- go-ethereum生成solidity calldata非常容易:
contractABI, err := abi.JSON(strings.NewReader(ABI))
encodedData, err := contractABI.Pack(method, args...)
- go-ethereum中crypto.Sign默认签出来的v是0, 1需要加27
- A delegateCall B, 如果B会修改数据那势必会修改到A上, 如果B本身就没有storage就不会有问题. B也可以是A, 这样也不会数据corrupt的风险
- solidity计算implementation合约的方法:
bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
- solidity使用
abi.encodePacked来生成calldata, 链接string以及hash数组类数据
- solidity使用
bytes32(uint256(keccak256(abi.encode(k, p)))) 来计算mapping某个key的storage slot
- solidity使用
bytes32(uint256(keccak256(abi.encode(p))) + k) 来计算array某个index的storage slot
- solidity中的
abi.encode等价于ethers中的defaultAbiCoder.encode, abi.encodePacked 等价于ethers中的solidityPack
0x08c379a0 // Function selector of "Error(string)"
0000000000000000000000000000000000000000000000000000000000000020 // Offset of string return value
0000000000000000000000000000000000000000000000000000000000000047 // Length of string return value (the revert reason)
6d7946756e6374696f6e206f6e6c79206163636570747320617267756d656e74 // first 32 bytes of the revert reason
7320776869636820617265206772656174686572207468616e206f7220657175 // next 32 bytes of the revert reason
616c20746f203500000000000000000000000000000000000000000000000000 // last 7 bytes of the revert reason
- 根据salt和creationCode计算合约地址
address predictedAddress = address(uint160(uint(keccak256(abi.encodePacked(
bytes1(0xff),
address(this),
salt,
keccak256(abi.encodePacked(
type(D).creationCode,
arg
))
)))));
- 合约事件检索
- indexed非数值类型会被hash
- 非indexed数据会原封不动放到data中
- 重要的EIP
- EIP1559
- EIP712, EIP2612
- EIP1822, EIP1967, EIP2535
- EIP3156, EIP4626
- EIP4337: 抽象钱包
- EIP4844: 坎昆升级
- EIP1271: contract signature
- solidity中bytes在memory里仅仅包含length + data，但是作为calldata或者returndata则会包含offset
