ERC-20
Overview
Max Total Supply
831,379.61109561446941018 VERSE-X
Holders
1,788
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.006341887460648047 VERSE-XValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Minimal Proxy Contract for 0x7290367aa694703220516a35e68e3d339ee7d193
Contract Name:
SwapsPair
Compiler Version
v0.8.14+commit.80d49f37
Contract Source Code (Solidity Multiple files format)
// SPDX-License-Identifier: BCOM pragma solidity =0.8.14; import "./IERC20.sol"; import "./ISwapsFactory.sol"; import "./ISwapsCallee.sol"; import "./SwapsERC20.sol"; contract SwapsPair is SwapsERC20 { uint224 constant Q112 = 2 ** 112; uint112 constant UINT112_MAX = type(uint112).max; uint256 public constant MINIMUM_LIQUIDITY = 10 ** 3; bytes4 private constant SELECTOR = bytes4( keccak256(bytes('transfer(address,uint256)')) ); address public factory; address public token0; address public token1; uint112 private reserve0; uint112 private reserve1; uint32 private blockTimestampLast; uint256 public price0CumulativeLast; uint256 public price1CumulativeLast; uint256 public kLast; uint256 private unlocked; modifier lock() { require( unlocked == 1, "SwapsPair: LOCKED" ); unlocked = 0; _; unlocked = 1; } 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 initialize( address _token0, address _token1 ) external { require( factory == ZERO_ADDRESS, "SwapsPair: ALREADY_INITIALIZED" ); token0 = _token0; token1 = _token1; factory = msg.sender; unlocked = 1; } function getReserves() public view returns ( uint112, uint112, uint32 ) { return ( reserve0, reserve1, blockTimestampLast ); } function _update( uint256 _balance0, uint256 _balance1, uint112 _reserve0, uint112 _reserve1 ) private { require( _balance0 <= UINT112_MAX && _balance1 <= UINT112_MAX, "SwapsPair: OVERFLOW" ); uint32 blockTimestamp = uint32(block.timestamp % 2 ** 32); unchecked { uint32 timeElapsed = blockTimestamp - blockTimestampLast; if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) { price0CumulativeLast += uint256(uqdiv(encode(_reserve1), _reserve0)) * timeElapsed; price1CumulativeLast += uint256(uqdiv(encode(_reserve0), _reserve1)) * timeElapsed; } } reserve0 = uint112(_balance0); reserve1 = uint112(_balance1); blockTimestampLast = blockTimestamp; emit Sync( reserve0, reserve1 ); } function _mintFee( uint112 _reserve0, uint112 _reserve1, uint256 _kLast ) private { if (_kLast == 0) return; uint256 rootK = sqrt(uint256(_reserve0) * _reserve1); uint256 rootKLast = sqrt(_kLast); if (rootK > rootKLast) { uint256 liquidity = totalSupply * (rootK - rootKLast) / (rootK * 5 + rootKLast); if (liquidity == 0) return; _mint( ISwapsFactory(factory).feeTo(), liquidity ); } } 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 - _reserve0; uint256 amount1 = balance1 - _reserve1; _mintFee( _reserve0, _reserve1, kLast ); uint256 _totalSupply = totalSupply; if (_totalSupply == 0) { liquidity = sqrt( amount0 * amount1 ) - MINIMUM_LIQUIDITY; _mint( ZERO_ADDRESS, MINIMUM_LIQUIDITY ); } else { liquidity = min( amount0 * _totalSupply / _reserve0, amount1 * _totalSupply / _reserve1 ); } require( liquidity > 0, "INSUFFICIENT_LIQUIDITY_MINTED" ); _mint( _to, liquidity ); _update( balance0, balance1, _reserve0, _reserve1 ); kLast = uint256(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, kLast ); uint256 _totalSupply = totalSupply; amount0 = liquidity * balance0 / _totalSupply; amount1 = liquidity * balance1 / _totalSupply; require( amount0 > 0 && amount1 > 0, "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 ); kLast = uint256(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, "INSUFFICIENT_OUTPUT_AMOUNT" ); ( uint112 _reserve0, uint112 _reserve1, ) = getReserves(); require( _amount0Out < _reserve0 && _amount1Out < _reserve1, "INSUFFICIENT_LIQUIDITY" ); uint256 balance0; uint256 balance1; { address _token0 = token0; address _token1 = token1; if (_amount0Out > 0) _safeTransfer(_token0, _to, _amount0Out); if (_amount1Out > 0) _safeTransfer(_token1, _to, _amount1Out); if (_data.length > 0) ISwapsCallee(_to).swapsCall( 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, "INSUFFICIENT_INPUT_AMOUNT" ); { uint256 balance0Adjusted = balance0 * 1000 - (_amount0In * 3); uint256 balance1Adjusted = balance1 * 1000 - (_amount1In * 3); require( balance0Adjusted * balance1Adjusted >= uint256(_reserve0) * _reserve1 * (1000 ** 2) ); } _update( balance0, balance1, _reserve0, _reserve1 ); emit Swap( msg.sender, _amount0In, _amount1In, _amount0Out, _amount1Out, _to ); } function skim() external lock { address _token0 = token0; address _token1 = token1; address _feesTo = ISwapsFactory(factory).feeTo(); _safeTransfer( _token0, _feesTo, IERC20(_token0).balanceOf(address(this)) - reserve0 ); _safeTransfer( _token1, _feesTo, IERC20(_token1).balanceOf(address(this)) - reserve1 ); } function sync() external lock { _update( IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1 ); } function encode( uint112 _y ) pure internal returns (uint224 z) { unchecked { z = uint224(_y) * Q112; } } function uqdiv( uint224 _x, uint112 _y ) pure internal returns (uint224 z) { unchecked { z = _x / uint224(_y); } } function min( uint256 _x, uint256 _y ) internal pure returns (uint256 z) { z = _x < _y ? _x : _y; } function sqrt( uint256 _y ) internal pure returns (uint256 z) { unchecked { if (_y > 3) { z = _y; uint256 x = _y / 2 + 1; while (x < z) { z = x; x = (_y / x + x) / 2; } } else if (_y != 0) { z = 1; } } } function _safeTransfer( address _token, address _to, uint256 _value ) internal { (bool success, bytes memory data) = _token.call( abi.encodeWithSelector( SELECTOR, _to, _value ) ); require( success && ( data.length == 0 || abi.decode( data, (bool) ) ), "SwapsPair: TRANSFER_FAILED" ); } }
File 1 of 5: IERC20.sol
// SPDX-License-Identifier: BCOM pragma solidity =0.8.14; interface IERC20 { function balanceOf( address _owner ) external view returns (uint256); }
File 2 of 5: ISwapsCallee.sol
// SPDX-License-Identifier: BCOM pragma solidity =0.8.14; interface ISwapsCallee { function swapsCall( address _sender, uint256 _amount0, uint256 _amount1, bytes calldata _data ) external; }
File 3 of 5: ISwapsFactory.sol
// SPDX-License-Identifier: BCOM pragma solidity =0.8.14; interface ISwapsFactory { 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; function cloneTarget() external view returns (address target); }
File 4 of 5: SwapsERC20.sol
// SPDX-License-Identifier: BCOM pragma solidity =0.8.14; contract SwapsERC20 { string public constant name = "Verse Exchange"; string public constant symbol = "VERSE-X"; uint8 public constant decimals = 18; address constant ZERO_ADDRESS = address(0); uint256 constant UINT256_MAX = type(uint256).max; uint256 public totalSupply; mapping(address => uint256) public balanceOf; mapping(address => mapping(address => uint256)) public allowance; mapping(address => uint256) public nonces; bytes32 public immutable DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256( "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)" ); event Approval( address indexed owner, address indexed spender, uint256 value ); event Transfer( address indexed from, address indexed to, uint256 value ); constructor() { DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(name)), keccak256(bytes("1")), block.chainid, address(this) ) ); } function _mint( address _to, uint256 _value ) internal { totalSupply = totalSupply + _value; unchecked { balanceOf[_to] = balanceOf[_to] + _value; } emit Transfer( ZERO_ADDRESS, _to, _value ); } function _burn( address _from, uint256 _value ) internal { unchecked { totalSupply = totalSupply - _value; } balanceOf[_from] = balanceOf[_from] - _value; emit Transfer( _from, ZERO_ADDRESS, _value ); } function _approve( address _owner, address _spender, uint256 _value ) private { allowance[_owner][_spender] = _value; emit Approval( _owner, _spender, _value ); } function _transfer( address _from, address _to, uint256 _value ) private { balanceOf[_from] = balanceOf[_from] - _value; unchecked { balanceOf[_to] = balanceOf[_to] + _value; } emit Transfer( _from, _to, _value ); } function approve( address _spender, uint256 _value ) external returns (bool) { _approve( msg.sender, _spender, _value ); return true; } function transfer( address _to, uint256 _value ) external returns (bool) { _transfer( msg.sender, _to, _value ); return true; } function transferFrom( address _from, address _to, uint256 _value ) external returns (bool) { if (allowance[_from][msg.sender] != UINT256_MAX) { allowance[_from][msg.sender] -= _value; } _transfer( _from, _to, _value ); return true; } function permit( address _owner, address _spender, uint256 _value, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external { require( _deadline >= block.timestamp, "SwapsERC20: PERMIT_CALL_EXPIRED" ); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256( abi.encode( PERMIT_TYPEHASH, _owner, _spender, _value, nonces[_owner]++, _deadline ) ) ) ); if (uint256(_s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { revert("SwapsERC20: INVALID_SIGNATURE"); } address recoveredAddress = ecrecover( digest, _v, _r, _s ); require( recoveredAddress != ZERO_ADDRESS && recoveredAddress == _owner, "SwapsERC20: INVALID_SIGNATURE" ); _approve( _owner, _spender, _value ); } }
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