Python开发Solana加密交易Telegram机器人遇类型转换错误

问题原因 #

新版本solana-py库的get_transaction方法要求传入Signature对象，而非原始字符串类型的交易ID。直接传递清理后的Base58字符串会触发类型转换错误：argument 'signature': 'str' object cannot be converted to 'Signature'。

解决步骤 #

1. 导入solana.publickey模块中的Signature类
2. 将清理后的交易ID字符串通过Signature.from_string()方法转换为Signature对象
3. 新增转换过程的异常捕获，处理无效Base58格式的情况

修改后的完整代码 #

from solana.rpc.api import Client  # type: ignore
from solana.publickey import Signature  # 新增导入Signature类
import re

# Set up your Solana RPC endpoint
SOLANA_RPC_URL = "https://api.mainnet-beta.solana.com"
solana_client = Client(SOLANA_RPC_URL)

# Function to sanitize transaction ID
def sanitize_transaction_id(transaction_id: str) -> str:
    """
    Removes invalid characters from a transaction ID, ensuring it is a valid Base58 string.
    """
    return re.sub(r'[^123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]', '', transaction_id)

# Function to check a Solana transaction
def check_transaction(transaction_id: str):
    try:
        # Sanitize the transaction ID
        sanitized_transaction_id = sanitize_transaction_id(transaction_id)
        print(f"Raw Transaction ID: {transaction_id}")
        print(f"Sanitized Transaction ID: {sanitized_transaction_id}")

        # Ensure the sanitized transaction ID is 88 characters long
        if len(sanitized_transaction_id) != 88:  # Solana transaction signatures are typically 88 Base58 characters
            raise ValueError("Transaction ID length is invalid.")
        
        # 将字符串转换为Signature对象
        try:
            signature = Signature.from_string(sanitized_transaction_id)
        except ValueError as ve:
            raise ValueError("Invalid Base58 transaction signature format.") from ve

        # Fetch the transaction details using the Solana RPC API
        print("Attempting to fetch transaction details...")
        transaction = solana_client.get_transaction(signature)  # 传递Signature对象而非字符串

        if not transaction or not transaction.get("result"):
            print("Transaction not found or incomplete.")
            return

        print("Transaction details fetched successfully!")
        print(transaction)
    except ValueError as ve:
        print(f"Validation Error: {ve}")
    except Exception as e:
        print(f"Unexpected Error: {e}")

# Example usage
if __name__ == "__main__":
    # Replace with your test transaction ID
    test_transaction_id = "2JNwfJbNmTFkH2YuWWErWTaNpMpbqETguMiLFWqFE6mMy8LiNrf3N9dYZc66NwowybPd1JaE1thTBT36cRx4h7ki"
    check_transaction(test_transaction_id)

关键修改点说明 #

• 新增from solana.publickey import Signature导入语句
• 在长度校验后，添加字符串转Signature对象的逻辑，并捕获转换失败的异常
• 将get_transaction的参数从字符串改为转换后的signature对象

内容的提问来源于stack exchange，提问作者Abhinav Sharma