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Skyge/CalcContractAddress.sol

Created February 27, 2023 12:17
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Calculate contract address that generates by opcode `create`.
Raw
CalcContractAddress.sol
pragma solidity ^0.4.0;
contract CalcContractAddress {
function addressFrom(address _origin, uint _nonce) public pure returns (address) {
bytes memory data;
if (_nonce == 0x00) data = abi.encodePacked(byte(0xd6), byte(0x94), _origin, byte(0x80));
else if (_nonce <= 0x7f) data = abi.encodePacked(byte(0xd6), byte(0x94), _origin, byte(_nonce));
else if (_nonce <= 0xff) data = abi.encodePacked(byte(0xd7), byte(0x94), _origin, byte(0x81), uint8(_nonce));
else if (_nonce <= 0xffff) data = abi.encodePacked(byte(0xd8), byte(0x94), _origin, byte(0x82), uint16(_nonce));
else if (_nonce <= 0xffffff) data = abi.encodePacked(byte(0xd9), byte(0x94), _origin, byte(0x83), uint24(_nonce));
else data = abi.encodePacked(byte(0xda), byte(0x94), _origin, byte(0x84), uint32(_nonce));
return address(keccak256(data));
}
}
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