1 unstable release
0.1.0 | Aug 26, 2021 |
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#22 in #eth
710 downloads per month
11KB
140 lines
Ethereum abi.encodePacked() in Rust
This project allows data serialization and packing in Rust as it's being done in Solidity with abi.encodePacked()
Example usage
packing an uint24
let input = vec![
// this is supposed to be uint24 variable in solidity
SolidityDataType::NumberWithShift(U256::from(4001), TakeLastXBytes(24))
];
let (bytes, hash) = abi::encode_packed(&input);
let hash = format!("0x{:}", hash);
let expected = "0x000fa1";
assert_eq!(hash, expected);
Packing a lot of data
Solidity
function packer(
uint24 uint24_data,
uint256 tokenId,
string calldata ipfsURI,
address sample,
uint256 id
) public pure returns (bytes memory ){
bytes memory res = abi.encodePacked(uint24_data, tokenId, ipfsURI, sample, id);
return res;
}
Rust
let address = hex::decode("d8b934580fcE35a11B58C6D73aDeE468a2833fa8").unwrap();
let address: [u8; 20] = address.try_into().unwrap();
let input = vec![
SolidityDataType::NumberWithShift(U256::from(3838), TakeLastXBytes(24)),
SolidityDataType::Number(U256::from(4001)),
SolidityDataType::String("this-is-a-sample-string"),
SolidityDataType::Address(Address::from(address)),
SolidityDataType::Number(U256::from(1)),
];
let (_bytes, hash) = abi::encode_packed(&input);
let hash = format!("0x{:}", hash);
let expected = "0x000efe0000000000000000000000000000000000000000000000000000000000000fa1746869732d69732d612d73616d706c652d737472696e67d8b934580fce35a11b58c6d73adee468a2833fa80000000000000000000000000000000000000000000000000000000000000001";
assert_eq!(hash, expected);
Dependencies
~2.6–3.5MB
~60K SLoC