ninjacato/erc20

Rust ERC20 parser

erc20

Rust ERC20 parser

This project intends to parse the Ethereum transactions from web3 into an abstraction that makes generic dealing with Ethereum or ERC20 transfers.

Available at https://crates.io/crates/erc20

Code examples

Parsing a transfer

let serialized_str = "a9059cbb0000000000000000000000006748f50f686bfbca6fe8ad62b22228b87f31ff2b00000000000000000000000000000000000000000000003635c9adc5dea00000";

let transaction = Transaction {
    hash: H256::from_str("43a5d6d13b6a9dca381e3f4b4677a4b9e5d9f80d1a5b6cfa2b1404fab733bcee").unwrap(),
    nonce: Default::default(),
    block_hash: None,
    block_number: None,
    transaction_index: None,
    from: H160::random(),
    to: Some(H160::random()),
    value: Default::default(),
    gas_price: Default::default(),
    gas: Default::default(),
    input: Bytes(hex::decode(serialized_str).unwrap()),
    raw: None,
};

let resp: Result<TransactionAndTransferType, ERC20Error> = transaction.clone().try_into();
assert!(resp.is_ok());
let resp = resp.unwrap();
assert_eq!(transaction.from, resp.from());

Identifying an ERC20 contract address

let tusd_address = H160::from_str("0000000000085d4780B73119b644AE5ecd22b376").unwrap();
assert_eq!("0x0000000000085d4780b73119b644ae5ecd22b376".to_string(), format!("{:?}", tusd_address));

let contract_address: ContractAddress = tusd_address.into();
assert_eq!(ContractAddress::TUSD, contract_address);

let tusd_from_contract: H160 = contract_address.into();
assert_eq!(tusd_address, tusd_from_contract);

References

• https://eips.ethereum.org/EIPS/eip-20