如何验证交易是否由 NEAR 协议中的给定帐户 ID 签名？

Question

我有一个已签名的交易，我想验证它是由 NEAR 上存在的帐户 ID 签名的。

Answer 1

问题有三层：

检查交易哈希。用 Borsh 序列化交易并计算 sha256，它应该匹配 transaction.hash.

验证签名对于给定的 public 密钥是否有效。使用可以验证给定签名类型的任何可用工具。 Python里面有ed25519包，所以这里举例：

import ed25519
import base58

transaction = {
    "hash": "EzvvJEqdxKA62oAjG32y5herDtRGYEdmZXHDDyxorJ48",
    "public_key": "ed25519:oNCFEmRotRHTySKqmAwifNZ8VRpYS973p8cL61y7eiE",
    "signature": "ed25519:46WsywQYe31isWcHASrnR2pYCja4Mtjzs4n87isrTHWyDdX5uwrUaUn4SbhY9BMwWKvWwdcuyCjMsXdkXdPJv8ko",
}

pk_bytes = base58.b58decode(transaction['public_key'][len('ed25519:'):])
pk = ed25519.VerifyingKey(pk_bytes)

# OK:
pk.verify(
    sig=base58.b58decode(transaction['signature'][len('ed25519:'):]),
    msg=base58.b58decode(transaction['hash'])
)

# Exception BadSignatureError:
pk.verify(
    sig=base58.b58decode('66666666' + transaction['signature'][len('ed25519:') + 8:]),
    msg=base58.b58decode(transaction['hash'])
)

使用 near-shell、near-api-* 或原始 RPC 调用检查给定帐户 ID 的密钥是否存在：

$ http post https://rpc.nearprotocol.com method=query params:='["access_key/test/ed25519:oNCFEmRotRHTySKqmAwifNZ8VRpYS973p8cL61y7eiE", ""]' id=123 jsonrpc=2.0

{
    ...
    "result": {
        "block_height": 3297678,
        "nonce": 10493,
        "permission": "FullAccess"
    }
}

如何验证交易是否由 NEAR 协议中的给定帐户 ID 签名？

How to verify that a transaction was signed by a given account ID in NEAR protocol?

nearprotocol