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pragma solidity =0.5.16;
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interface IFireBirdFactory {
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event PairCreated(address indexed token0, address indexed token1, address pair, uint32 tokenWeight0, uint32 swapFee, uint256);
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function feeTo() external view returns (address);
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function formula() external view returns (address);
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function protocolFee() external view returns (uint256);
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function feeToSetter() external view returns (address);
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function getPair(
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address tokenA,
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address tokenB,
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uint32 tokenWeightA,
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uint32 swapFee
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) external view returns (address pair);
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function allPairs(uint256) external view returns (address pair);
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function isPair(address) external view returns (bool);
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function allPairsLength() external view returns (uint256);
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function createPair(
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address tokenA,
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address tokenB,
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uint32 tokenWeightA,
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uint32 swapFee
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) external returns (address pair);
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function getWeightsAndSwapFee(address pair)
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external
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view
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returns (
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uint32 tokenWeight0,
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uint32 tokenWeight1,
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uint32 swapFee
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);
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function setFeeTo(address) external;
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function setFeeToSetter(address) external;
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function setProtocolFee(uint256) external;
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}
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interface IFireBirdPair {
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event Approval(address indexed owner, address indexed spender, uint256 value);
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event Transfer(address indexed from, address indexed to, uint256 value);
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function name() external view returns (string memory);
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function symbol() external view returns (string memory);
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function decimals() external pure returns (uint8);
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function totalSupply() external view returns (uint256);
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function balanceOf(address owner) external view returns (uint256);
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function allowance(address owner, address spender) external view returns (uint256);
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function approve(address spender, uint256 value) external returns (bool);
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function transfer(address to, uint256 value) external returns (bool);
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function transferFrom(
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address from,
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address to,
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uint256 value
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) external returns (bool);
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function DOMAIN_SEPARATOR() external view returns (bytes32);
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function PERMIT_TYPEHASH() external pure returns (bytes32);
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function nonces(address owner) external view returns (uint256);
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function permit(
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address owner,
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address spender,
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uint256 value,
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uint256 deadline,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external;
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event PaidProtocolFee(uint112 collectedFee0, uint112 collectedFee1);
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event Mint(address indexed sender, uint256 amount0, uint256 amount1);
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event Burn(address indexed sender, uint256 amount0, uint256 amount1, address indexed to);
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event Swap(address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, address indexed to);
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event Sync(uint112 reserve0, uint112 reserve1);
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function MINIMUM_LIQUIDITY() external pure returns (uint256);
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function factory() external view returns (address);
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function token0() external view returns (address);
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function token1() external view returns (address);
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function getReserves()
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external
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view
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returns (
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uint112 reserve0,
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uint112 reserve1,
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uint32 blockTimestampLast
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);
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function getCollectedFees() external view returns (uint112 _collectedFee0, uint112 _collectedFee1);
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function getTokenWeights() external view returns (uint32 tokenWeight0, uint32 tokenWeight1);
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function getSwapFee() external view returns (uint32);
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function price0CumulativeLast() external view returns (uint256);
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function price1CumulativeLast() external view returns (uint256);
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function mint(address to) external returns (uint256 liquidity);
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function burn(address to) external returns (uint256 amount0, uint256 amount1);
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function swap(
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uint256 amount0Out,
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uint256 amount1Out,
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address to,
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bytes calldata data
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) external;
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function skim(address to) external;
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function sync() external;
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function initialize(
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address,
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address,
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uint32,
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uint32
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) external;
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}
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interface IFireBirdFormula {
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function getFactoryReserveAndWeights(
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address factory,
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address pair,
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address tokenA,
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uint8 dexId
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)
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external
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view
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returns (
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address tokenB,
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uint256 reserveA,
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uint256 reserveB,
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uint32 tokenWeightA,
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uint32 tokenWeightB,
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uint32 swapFee
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);
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function getFactoryWeightsAndSwapFee(
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address factory,
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address pair,
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uint8 dexId
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)
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external
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view
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returns (
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uint32 tokenWeight0,
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uint32 tokenWeight1,
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uint32 swapFee
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);
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function getAmountIn(
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uint256 amountOut,
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uint256 reserveIn,
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uint256 reserveOut,
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uint32 tokenWeightIn,
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uint32 tokenWeightOut,
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uint32 swapFee
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) external view returns (uint256 amountIn);
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function getAmountOut(
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uint256 amountIn,
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uint256 reserveIn,
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uint256 reserveOut,
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uint32 tokenWeightIn,
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uint32 tokenWeightOut,
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uint32 swapFee
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) external view returns (uint256 amountOut);
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function getFactoryAmountsIn(
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address factory,
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address tokenIn,
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address tokenOut,
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uint256 amountOut,
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address[] calldata path,
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uint8[] calldata dexIds
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) external view returns (uint256[] memory amounts);
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function getFactoryAmountsOut(
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address factory,
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address tokenIn,
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address tokenOut,
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uint256 amountIn,
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address[] calldata path,
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uint8[] calldata dexIds
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) external view returns (uint256[] memory amounts);
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function ensureConstantValue(
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uint256 reserve0,
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uint256 reserve1,
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uint256 balance0Adjusted,
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uint256 balance1Adjusted,
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uint32 tokenWeight0
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) external view returns (bool);
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function getReserves(
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address pair,
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address tokenA,
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address tokenB
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) external view returns (uint256 reserveA, uint256 reserveB);
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function getOtherToken(address pair, address tokenA) external view returns (address tokenB);
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function quote(
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uint256 amountA,
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uint256 reserveA,
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uint256 reserveB
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) external pure returns (uint256 amountB);
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function sortTokens(address tokenA, address tokenB) external pure returns (address token0, address token1);
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function mintLiquidityFee(
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uint256 totalLiquidity,
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uint112 reserve0,
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uint112 reserve1,
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uint32 tokenWeight0,
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uint32 tokenWeight1,
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uint112 collectedFee0,
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uint112 collectedFee1
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) external view returns (uint256 amount);
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}
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interface IFireBirdERC20 {
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event Approval(address indexed owner, address indexed spender, uint256 value);
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event Transfer(address indexed from, address indexed to, uint256 value);
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function name() external view returns (string memory);
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function symbol() external view returns (string memory);
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function decimals() external pure returns (uint8);
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function totalSupply() external view returns (uint256);
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function balanceOf(address owner) external view returns (uint256);
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function allowance(address owner, address spender) external view returns (uint256);
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function approve(address spender, uint256 value) external returns (bool);
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function transfer(address to, uint256 value) external returns (bool);
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function transferFrom(
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address from,
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address to,
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uint256 value
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) external returns (bool);
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function DOMAIN_SEPARATOR() external view returns (bytes32);
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function PERMIT_TYPEHASH() external pure returns (bytes32);
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function nonces(address owner) external view returns (uint256);
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function permit(
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address owner,
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address spender,
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uint256 value,
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uint256 deadline,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external;
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}
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library SafeMath {
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function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
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require((z = x + y) >= x, "ds-math-add-overflow");
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}
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function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
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require((z = x - y) <= x, "ds-math-sub-underflow");
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}
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function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
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require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
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}
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function div(uint256 a, uint256 b) internal pure returns (uint256 c) {
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require(b > 0, "ds-math-division-by-zero");
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c = a / b;
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}
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}
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contract FireBirdERC20 is IFireBirdERC20 {
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using SafeMath for uint256;
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string public constant name = "FireBird Liquidity Provider";
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string public constant symbol = "FLP";
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uint8 public constant decimals = 18;
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uint256 public totalSupply;
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mapping(address => uint256) public balanceOf;
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mapping(address => mapping(address => uint256)) public allowance;
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bytes32 public DOMAIN_SEPARATOR;
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bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
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mapping(address => uint256) public nonces;
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constructor() public {
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uint256 chainId;
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assembly {
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chainId := chainid
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}
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DOMAIN_SEPARATOR = keccak256(
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abi.encode(keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(name)), keccak256(bytes("1")), chainId, address(this))
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);
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}
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function _mint(address to, uint256 value) internal {
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totalSupply = totalSupply.add(value);
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balanceOf[to] = balanceOf[to].add(value);
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emit Transfer(address(0), to, value);
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}
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function _burn(address from, uint256 value) internal {
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balanceOf[from] = balanceOf[from].sub(value);
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totalSupply = totalSupply.sub(value);
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emit Transfer(from, address(0), value);
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}
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function _approve(
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address owner,
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address spender,
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uint256 value
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) private {
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allowance[owner][spender] = value;
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emit Approval(owner, spender, value);
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}
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function _transfer(
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address from,
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address to,
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uint256 value
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) private {
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balanceOf[from] = balanceOf[from].sub(value);
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balanceOf[to] = balanceOf[to].add(value);
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emit Transfer(from, to, value);
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}
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function approve(address spender, uint256 value) external returns (bool) {
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_approve(msg.sender, spender, value);
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return true;
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}
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function transfer(address to, uint256 value) external returns (bool) {
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_transfer(msg.sender, to, value);
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return true;
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}
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function transferFrom(
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address from,
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address to,
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uint256 value
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) external returns (bool) {
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if (allowance[from][msg.sender] != uint256(-1)) {
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allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
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}
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_transfer(from, to, value);
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return true;
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}
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function permit(
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address owner,
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address spender,
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uint256 value,
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uint256 deadline,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external {
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require(deadline >= block.timestamp, "FLP: EXPIRED");
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bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))));
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address recoveredAddress = ecrecover(digest, v, r, s);
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require(recoveredAddress != address(0) && recoveredAddress == owner, "FLP: INVALID_SIGNATURE");
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_approve(owner, spender, value);
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}
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}
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library Math {
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function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
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z = x < y ? x : y;
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}
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function sqrt(uint256 y) internal pure returns (uint256 z) {
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if (y > 3) {
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z = y;
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uint256 x = y / 2 + 1;
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while (x < z) {
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z = x;
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x = (y / x + x) / 2;
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}
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} else if (y != 0) {
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z = 1;
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}
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}
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}
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library UQ112x112 {
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uint224 constant Q112 = 2**112;
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function encode(uint112 y) internal pure returns (uint224 z) {
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z = uint224(y) * Q112;
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}
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function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
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z = x / uint224(y);
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}
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}
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interface IERC20 {
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event Approval(address indexed owner, address indexed spender, uint256 value);
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event Transfer(address indexed from, address indexed to, uint256 value);
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function name() external view returns (string memory);
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function symbol() external view returns (string memory);
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function decimals() external view returns (uint8);
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function totalSupply() external view returns (uint256);
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function balanceOf(address owner) external view returns (uint256);
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function allowance(address owner, address spender) external view returns (uint256);
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function approve(address spender, uint256 value) external returns (bool);
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function transfer(address to, uint256 value) external returns (bool);
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function transferFrom(
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address from,
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address to,
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uint256 value
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) external returns (bool);
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}
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interface IUniswapV2Callee {
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function uniswapV2Call(
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address sender,
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uint256 amount0,
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uint256 amount1,
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bytes calldata data
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) external;
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}
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contract FireBirdPair is IFireBirdPair, FireBirdERC20 {
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using SafeMath for uint256;
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using UQ112x112 for uint224;
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uint256 public constant MINIMUM_LIQUIDITY = 10**3;
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bytes4 private constant SELECTOR = bytes4(keccak256(bytes("transfer(address,uint256)")));
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address public factory;
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address public token0;
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address public token1;
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uint112 private reserve0;
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uint112 private reserve1;
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uint32 private blockTimestampLast;
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uint256 public price0CumulativeLast;
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uint256 public price1CumulativeLast;
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uint256 private unlocked = 1;
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address public formula;
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uint112 private collectedFee0;
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uint112 private collectedFee1;
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uint32 private tokenWeight0;
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uint32 private swapFee;
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modifier lock() {
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require(unlocked == 1, "FLP: LOCKED");
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unlocked = 0;
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_;
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unlocked = 1;
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}
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function getReserves()
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public
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view
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returns (
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uint112 _reserve0,
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uint112 _reserve1,
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uint32 _blockTimestampLast
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)
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{
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_reserve0 = reserve0;
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_reserve1 = reserve1;
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_blockTimestampLast = blockTimestampLast;
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}
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function getCollectedFees() public view returns (uint112 _collectedFee0, uint112 _collectedFee1) {
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_collectedFee0 = collectedFee0;
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_collectedFee1 = collectedFee1;
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}
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function getTokenWeights() public view returns (uint32 _tokenWeight0, uint32 _tokenWeight1) {
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_tokenWeight0 = tokenWeight0;
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_tokenWeight1 = 100 - tokenWeight0;
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}
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function getSwapFee() public view returns (uint32 _swapFee) {
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_swapFee = swapFee;
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}
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function _safeTransfer(
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address token,
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address to,
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uint256 value
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) private {
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(bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
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require(success && (data.length == 0 || abi.decode(data, (bool))), "FLP: TRANSFER_FAILED");
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}
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constructor() public {
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factory = msg.sender;
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}
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|
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function initialize(
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address _token0,
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address _token1,
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uint32 _tokenWeight0,
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uint32 _swapFee
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) external {
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require(msg.sender == factory, "FLP: FORBIDDEN");
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token0 = _token0;
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token1 = _token1;
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tokenWeight0 = _tokenWeight0;
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swapFee = _swapFee;
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formula = IFireBirdFactory(factory).formula();
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}
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function _update(
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uint256 balance0,
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uint256 balance1,
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uint112 _reserve0,
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|
uint112 _reserve1
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) private {
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uint32 _tokenWeight0 = tokenWeight0;
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|
require(balance0 * (100 - _tokenWeight0) <= uint112(-1) && balance1 * _tokenWeight0 <= uint112(-1), "FLP: OVERFLOW");
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|
uint32 blockTimestamp = uint32(block.timestamp % 2**32);
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|
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
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|
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if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
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|
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uint112 mReserve0 = _reserve0 * (100 - _tokenWeight0);
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|
uint112 mReserve1 = _reserve1 * _tokenWeight0;
|
|
price0CumulativeLast += uint256(UQ112x112.encode(mReserve1).uqdiv(mReserve0)) * timeElapsed;
|
|
price1CumulativeLast += uint256(UQ112x112.encode(mReserve0).uqdiv(mReserve1)) * timeElapsed;
|
|
}
|
|
reserve0 = uint112(balance0);
|
|
reserve1 = uint112(balance1);
|
|
blockTimestampLast = blockTimestamp;
|
|
emit Sync(reserve0, reserve1);
|
|
}
|
|
|
|
function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
|
|
address feeTo = IFireBirdFactory(factory).feeTo();
|
|
uint112 protocolFee = uint112(IFireBirdFactory(factory).protocolFee());
|
|
feeOn = feeTo != address(0);
|
|
(uint112 _collectedFee0, uint112 _collectedFee1) = getCollectedFees();
|
|
if (protocolFee > 0 && feeOn && (_collectedFee0 > 0 || _collectedFee1 > 0)) {
|
|
uint32 _tokenWeight0 = tokenWeight0;
|
|
uint256 liquidity = IFireBirdFormula(formula).mintLiquidityFee(totalSupply, _reserve0, _reserve1, _tokenWeight0, 100 - _tokenWeight0, _collectedFee0 / protocolFee, _collectedFee1 / protocolFee);
|
|
if (liquidity > 0) _mint(feeTo, liquidity);
|
|
}
|
|
if (_collectedFee0 > 0) collectedFee0 = 0;
|
|
if (_collectedFee1 > 0) collectedFee1 = 0;
|
|
}
|
|
|
|
|
|
function mint(address to) external lock returns (uint256 liquidity) {
|
|
(uint112 _reserve0, uint112 _reserve1, ) = getReserves();
|
|
uint256 balance0 = IERC20(token0).balanceOf(address(this));
|
|
uint256 balance1 = IERC20(token1).balanceOf(address(this));
|
|
uint256 amount0 = balance0.sub(_reserve0);
|
|
uint256 amount1 = balance1.sub(_reserve1);
|
|
_mintFee(_reserve0, _reserve1);
|
|
uint256 _totalSupply = totalSupply;
|
|
|
|
if (_totalSupply == 0) {
|
|
liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
|
|
_mint(address(0), MINIMUM_LIQUIDITY);
|
|
|
|
} else {
|
|
liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
|
|
}
|
|
require(liquidity > 0, "FLP: INSUFFICIENT_LIQUIDITY_MINTED");
|
|
_mint(to, liquidity);
|
|
|
|
_update(balance0, balance1, _reserve0, _reserve1);
|
|
emit Mint(msg.sender, amount0, amount1);
|
|
}
|
|
|
|
|
|
function burn(address to) external lock returns (uint256 amount0, uint256 amount1) {
|
|
(uint112 _reserve0, uint112 _reserve1, ) = getReserves();
|
|
address _token0 = token0;
|
|
address _token1 = token1;
|
|
uint256 balance0 = IERC20(_token0).balanceOf(address(this));
|
|
uint256 balance1 = IERC20(_token1).balanceOf(address(this));
|
|
uint256 liquidity = balanceOf[address(this)];
|
|
_mintFee(_reserve0, _reserve1);
|
|
uint256 _totalSupply = totalSupply;
|
|
amount0 = liquidity.mul(balance0) / _totalSupply;
|
|
amount1 = liquidity.mul(balance1) / _totalSupply;
|
|
require(amount0 > 0 && amount1 > 0, "FLP: INSUFFICIENT_LIQUIDITY_BURNED");
|
|
_burn(address(this), liquidity);
|
|
_safeTransfer(_token0, to, amount0);
|
|
_safeTransfer(_token1, to, amount1);
|
|
balance0 = IERC20(_token0).balanceOf(address(this));
|
|
balance1 = IERC20(_token1).balanceOf(address(this));
|
|
|
|
_update(balance0, balance1, _reserve0, _reserve1);
|
|
emit Burn(msg.sender, amount0, amount1, to);
|
|
}
|
|
|
|
|
|
function swap(
|
|
uint256 amount0Out,
|
|
uint256 amount1Out,
|
|
address to,
|
|
bytes calldata data
|
|
) external lock {
|
|
require(amount0Out > 0 || amount1Out > 0, "FLP: INSUFFICIENT_OUTPUT_AMOUNT");
|
|
uint112 _reserve0 = reserve0;
|
|
uint112 _reserve1 = reserve1;
|
|
require(amount0Out < _reserve0 && amount1Out < _reserve1, "FLP: INSUFFICIENT_LIQUIDITY");
|
|
|
|
uint256 balance0;
|
|
uint256 balance1;
|
|
{
|
|
|
|
address _token0 = token0;
|
|
address _token1 = token1;
|
|
require(to != _token0 && to != _token1, "FLP: INVALID_TO");
|
|
if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out);
|
|
if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out);
|
|
if (data.length > 0) IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data);
|
|
balance0 = IERC20(_token0).balanceOf(address(this));
|
|
balance1 = IERC20(_token1).balanceOf(address(this));
|
|
}
|
|
uint256 amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
|
|
uint256 amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
|
|
require(amount0In > 0 || amount1In > 0, "FLP: INSUFFICIENT_INPUT_AMOUNT");
|
|
{
|
|
|
|
uint256 balance0Adjusted = balance0.mul(10000);
|
|
uint256 balance1Adjusted = balance1.mul(10000);
|
|
{
|
|
|
|
if (amount0In > 0) {
|
|
uint256 amount0InFee = amount0In.mul(swapFee);
|
|
balance0Adjusted = balance0Adjusted.sub(amount0InFee);
|
|
collectedFee0 = uint112(uint256(collectedFee0).add(amount0InFee));
|
|
}
|
|
if (amount1In > 0) {
|
|
uint256 amount1InFee = amount1In.mul(swapFee);
|
|
balance1Adjusted = balance1Adjusted.sub(amount1InFee);
|
|
collectedFee1 = uint112(uint256(collectedFee1).add(amount1InFee));
|
|
}
|
|
uint32 _tokenWeight0 = tokenWeight0;
|
|
if (_tokenWeight0 == 50) {
|
|
|
|
require(balance0Adjusted.mul(balance1Adjusted) >= uint256(_reserve0).mul(_reserve1).mul(10000**2), "FLP: K");
|
|
} else {
|
|
require(IFireBirdFormula(formula).ensureConstantValue(uint256(_reserve0).mul(10000), uint256(_reserve1).mul(10000), balance0Adjusted, balance1Adjusted, _tokenWeight0), "FLP: K");
|
|
}
|
|
}
|
|
}
|
|
_update(balance0, balance1, _reserve0, _reserve1);
|
|
emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
|
|
}
|
|
|
|
|
|
function skim(address to) external lock {
|
|
address _token0 = token0;
|
|
address _token1 = token1;
|
|
_safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
|
|
_safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
|
|
}
|
|
|
|
|
|
function sync() external lock {
|
|
_update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
|
|
}
|
|
}
|
|
|
|
contract FireBirdFactory is IFireBirdFactory {
|
|
address public feeTo;
|
|
address public formula;
|
|
uint256 public protocolFee;
|
|
address public feeToSetter;
|
|
|
|
mapping(bytes32 => address) private _pairSalts;
|
|
address[] public allPairs;
|
|
mapping(address => uint64) private _pairs;
|
|
|
|
constructor(address _feeToSetter, address _formula) public {
|
|
feeToSetter = _feeToSetter;
|
|
formula = _formula;
|
|
}
|
|
|
|
function isPair(address b) external view returns (bool) {
|
|
return _pairs[b] > 0;
|
|
}
|
|
|
|
function allPairsLength() external view returns (uint256) {
|
|
return allPairs.length;
|
|
}
|
|
|
|
function getPair(
|
|
address tokenA,
|
|
address tokenB,
|
|
uint32 tokenWeightA,
|
|
uint32 swapFee
|
|
) external view returns (address pair) {
|
|
(address token0, address token1, uint32 tokenWeight0) = tokenA < tokenB ? (tokenA, tokenB, tokenWeightA) : (tokenB, tokenA, 100 - tokenWeightA);
|
|
bytes32 salt = keccak256(abi.encodePacked(token0, token1, tokenWeight0, swapFee));
|
|
pair = _pairSalts[salt];
|
|
}
|
|
|
|
function createPair(
|
|
address tokenA,
|
|
address tokenB,
|
|
uint32 tokenWeightA,
|
|
uint32 swapFee
|
|
) external returns (address pair) {
|
|
require(tokenA != tokenB, "FLP: IDENTICAL_ADDRESSES");
|
|
require(tokenWeightA >= 2 && tokenWeightA <= 98 && (tokenWeightA % 2) == 0, "FLP: INVALID_TOKEN_WEIGHT");
|
|
|
|
require(swapFee >= 1 && swapFee <= 2000, "FLP: INVALID_SWAP_FEE");
|
|
(address token0, address token1, uint32 tokenWeight0) = tokenA < tokenB ? (tokenA, tokenB, tokenWeightA) : (tokenB, tokenA, 100 - tokenWeightA);
|
|
require(token0 != address(0), "FLP: ZERO_ADDRESS");
|
|
|
|
bytes memory bytecode = type(FireBirdPair).creationCode;
|
|
bytes32 salt = keccak256(abi.encodePacked(token0, token1, tokenWeight0, swapFee));
|
|
require(_pairSalts[salt] == address(0), "FLP: PAIR_EXISTS");
|
|
assembly {
|
|
pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
|
|
}
|
|
IFireBirdPair(pair).initialize(token0, token1, tokenWeight0, swapFee);
|
|
_pairSalts[salt] = address(pair);
|
|
allPairs.push(pair);
|
|
uint64 weightAndFee = uint64(swapFee);
|
|
weightAndFee |= uint64(tokenWeight0) << 32;
|
|
_pairs[address(pair)] = weightAndFee;
|
|
emit PairCreated(token0, token1, pair, tokenWeight0, swapFee, allPairs.length);
|
|
}
|
|
|
|
function setFeeTo(address _feeTo) external {
|
|
require(msg.sender == feeToSetter, "FLP: FORBIDDEN");
|
|
feeTo = _feeTo;
|
|
}
|
|
|
|
function setFeeToSetter(address _feeToSetter) external {
|
|
require(msg.sender == feeToSetter, "FLP: FORBIDDEN");
|
|
feeToSetter = _feeToSetter;
|
|
}
|
|
|
|
function setProtocolFee(uint256 _protocolFee) external {
|
|
require(msg.sender == feeToSetter, "FLP: FORBIDDEN");
|
|
require(_protocolFee == 0 || (_protocolFee >= 10000 && _protocolFee <= 100000), "FLP: Invalid Protocol fee");
|
|
protocolFee = _protocolFee;
|
|
}
|
|
|
|
function getWeightsAndSwapFee(address pair)
|
|
public
|
|
view
|
|
returns (
|
|
uint32 tokenWeight0,
|
|
uint32 tokenWeight1,
|
|
uint32 swapFee
|
|
)
|
|
{
|
|
uint64 weightAndFee = _pairs[pair];
|
|
if (weightAndFee > 0) {
|
|
swapFee = uint32(weightAndFee);
|
|
tokenWeight0 = uint32(weightAndFee >> 32);
|
|
tokenWeight1 = 100 - tokenWeight0;
|
|
} else {
|
|
|
|
return (50, 50, 30);
|
|
}
|
|
}
|
|
} |