mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
40 lines
1.6 KiB
Solidity
40 lines
1.6 KiB
Solidity
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contract C {
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function addr() external returns (address) {
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return address(this);
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}
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function testRunner() external returns (address a1, address a2) {
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assembly {
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// This is `return(0, 1)`. We are using a simplified/fixed initcode to avoid
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// instability due to metadata changes.
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let initcode := hex"60016000f3"
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mstore(0, initcode)
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a1 := create(0, 0, 5)
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a2 := create2(0, 0, 5, address())
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}
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}
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function testCalc() external returns (address a1, address a2) {
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a1 = calculateCreate(address(this), 1);
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a2 = calculateCreate2(address(this), keccak256(hex"60016000f3"), bytes32(uint256(uint160(address(this)))));
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}
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function calculateCreate(address from, uint256 nonce) private pure returns (address) {
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assert(nonce <= 127);
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bytes memory data =
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bytes.concat(hex"d694", bytes20(uint160(from)), nonce == 0 ? bytes1(hex"80") : bytes1(uint8(nonce)));
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return address(uint160(uint256(keccak256(data)))); // Take the lower 160-bits
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}
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function calculateCreate2(address creator, bytes32 codehash, bytes32 salt) private pure returns (address) {
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return address(uint160(uint256(keccak256(abi.encodePacked(bytes1(0xff), creator, salt, codehash)))));
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}
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}
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// ====
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// EVMVersion: >=constantinople
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// ----
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// addr() -> 0xc06afe3a8444fc0004668591e8306bfb9968e79e
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// testRunner() -> 0x137aa4dfc0911524504fcd4d98501f179bc13b4a, 0x2c1c30623ddd93e0b765a6caaca0c859eeb0644d
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// testCalc() -> 0x137aa4dfc0911524504fcd4d98501f179bc13b4a, 0x2c1c30623ddd93e0b765a6caaca0c859eeb0644d
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