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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
// 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 (last updated v4.7.0) (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 Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
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/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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 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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}
// File: ShiwaMigrator.sol
/*
_____ __ _ __ ____ __
/ ___// /_ (_) ______ _ / |/ (_)___ __________ _/ /_____ _____
\__ \/ __ \/ / | /| / / __ `/ / /|_/ / / __ `/ ___/ __ `/ __/ __ \/ ___/
___/ / / / / /| |/ |/ / /_/ / / / / / / /_/ / / / /_/ / /_/ /_/ / /
/____/_/ /_/_/ |__/|__/\__,_/ /_/ /_/_/\__, /_/ \__,_/\__/\____/_/
/____/
Migrator Contract to migrate Shiwa Version 1 to Shiwa Version 2
Supercharged version of SHIWA now with dynamic rewards for all holders
-Website: https://shiwa.finance
-Telegram: https://t.me/shiwaportal
-Telegram announcements: https://t.me/shiwaAnnouncements
-Twitter: https://twitter.com/shiwa_finance
-Facebook: https://www.facebook.com/OFFICIALSHIWA/
-Github: https://github.com/Shiwa-Finance
-OpenSea: https://opensea.io/ShiwaOfficial
SHIWA is a true decentralized utility meme token. Our mission is to empower the community via the Dao Governance,
We are a constantly evolving decentralised ecosystem that puts its destiny in the hands of its holders.
SHIWA is a token that combines the power of a Wolf meme with real utility in the blockchain, including NFT Collections,
Web3 Marketplace & DAO Governance utility. Our goal is a honourable one, we want to improve transparency, honour,
trust & success in the cryptocurrency industry thus making SHIWA a safe haven for all our investors!
Shiwa Version II go live at 19/01/22 12:00 UTC
Visit our website to migrate from Shiwa version 1 to Shiwa version 2.
The King of the both Ethereums is back, renewed and more KING than ever!
Shiwa V2 is the first contract on the entire blockchain to deliver dynamic rewards to all holders that
will be voted in our DAO. The token of the moment will be in your wallet just for holding Shiwa!
*/
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
contract ShiwaMigrator is Ownable {
IERC20 public ShiwaTokenV1;
IERC20 public ShiwaTokenV2;
address public targetDest;
constructor(
address _tokenV1,
address _tokenV2,
address _target
) {
ShiwaTokenV1 = IERC20(_tokenV1);
ShiwaTokenV2 = IERC20(_tokenV2);
targetDest = _target;
}
function migrateV2(uint256 _amount) public returns (bool) {
ShiwaTokenV1.transferFrom(_msgSender(), targetDest, _amount);
uint256 _decAmount = precisionConverter(_amount);
ShiwaTokenV2.transfer(_msgSender(), _decAmount);
return true;
}
function migrateV2Nav(uint256 _amount, address _to) public returns (bool) {
ShiwaTokenV1.transferFrom(_msgSender(), targetDest, _amount);
uint256 _decAmount = precisionConverter(_amount);
ShiwaTokenV2.transfer(_to, _decAmount);
return true;
}
function migrateV2EmergencyWithdraw() public onlyOwner returns (bool) {
ShiwaTokenV2.transfer(_msgSender(), ShiwaTokenV2.balanceOf(_msgSender()));
return true;
}
function precisionConverter(uint256 _amount) public pure returns (uint256) {
return _amount * 10 ** (18-9);
}
function recoverERC20(address _token, uint256 _amount) public onlyOwner returns (bool) {
IERC20(_token).transfer(_msgSender(), _amount);
return true;
}
} |