Ethereum의 경우 버전에 따라 트랜잭션에 gasPrice를 쓸 지, maxFeePerGas/maxPriorityFeePerGas 를 쓸 지가 정해진다. https://ethereum.stackexchange.com/questions/147692/how-to-get-public-key-by-the-transaction-hash 를 참고.
주소를 얻을 때, Public key에서 앞의 한 바이트(0x04)를 빼고, keccak256을 돌리는 부분에 유의하자.
const { ethers } = require("hardhat");
// 트랜잭션 서명 값
// const r = "0xe680637b83a1dd102364503bd77979b87c92ba651132a4df8e839af69c20af95";
// const s = "0x65becfa32384747adb05f543397baaf23d1c55fa28d0c9a38924912dae6df28f";
// const v = 12266684226873;
// const chainId = 6133342113419;
// 트랜잭션 해시
const txHash = "0xc7159866fb5b94d291e8624bdc731b7a6d46533b398065de7aa7dd1af7b6aa36";
const ethermainHash = "0xef120deb6ff2e516ad44724d220c0cd73166d169a2a0b0f66dfb5613d2d6169c"
const sepoliaHash = "0xfe4ddad4cae9ea353fc91441ee5db6c70bd5468673d907926be92dd4b8a63f63"
// 실제 트랜잭션에 사용된 private key. 아무거나 넣자.
const privateKey = "0x0000000000000000000000000000000000000000000000000000000000000001";
// Web3 프로바이더 설정 (Hardhat 로컬 노드 사용 예시)
const provider = ethers.provider;
// 서명된 트랜잭션 정보 가져오기
async function getPublicKeyFromTransactionHash(provider, txHash) {
// Fetch the transaction using the transaction hash and provier
const tx = await provider.getTransaction(txHash);
console.log(tx);
// Extract the all the relevant fields from the transaction (We need all of them)
const unsignedTx = {
gasPrice: tx.gasPrice,
gasLimit: tx.gasLimit,
value: tx.value,
nonce: tx.nonce,
data: tx.data,
chainId: tx.chainId,
to: tx.to,
type: tx.type,
// maxFeePerGas: tx.maxFeePerGas,
// maxPriorityFeePerGas: tx.maxPriorityFeePerGas,
};
// Serializing tx without the signature
const serializedTx = ethers.utils.serializeTransaction(unsignedTx);
// Extract the signature (v, r, s) from the transaction
const { v, r, s } = tx;
// Join splitted signature
const signature = ethers.utils.joinSignature({ v, r, s });
const recoveredPublicKey = ethers.utils.recoverPublicKey(
ethers.utils.keccak256(serializedTx),
signature,
);
console.log("recoveredPublicKey:", recoveredPublicKey);
const keccak = ethers.utils.keccak256("0x" + recoveredPublicKey.slice(4))
console.log("keccak256 of recoveredPublicKey:", keccak, ethers.utils.keccak256("0x" + recoveredPublicKey.slice(4)));
// Recover the address or public key with (replace recoverAddress by recoverPublicKey) associated with the transaction
return ethers.utils.recoverAddress(
ethers.utils.keccak256(serializedTx),
signature
);
}
async function main() {
const address = await getPublicKeyFromTransactionHash(provider, txHash);
console.log("Address:", address);
}
main()
.then(() => process.exit(0))
.catch((error) => {
console.error(error);
process.exit(1);
});