75 lines
2.7 KiB
Python
75 lines
2.7 KiB
Python
import logging
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from decimal import Decimal
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from typing import Optional, Dict, Any
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from web3 import AsyncWeb3, AsyncHTTPProvider
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from eth_account import Account
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from app.config import settings
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logger = logging.getLogger(__name__)
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class RelayerService:
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"""
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【WTFX Relayer 链上代付撮合服务】
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代表持有 Session Key 授权的用户，将其交易免 Gas 费提交至链上执行
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"""
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def __init__(self):
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self.w3 = AsyncWeb3(AsyncHTTPProvider(settings.ROBINHOOD_TESTNET_RPC))
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# 管理员/Relayer 私钥
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self.relayer_private_key = "0x02aef1247dbddab8e8d6b0962f086f47874626e94988541ca21c9c2ea2475e62"
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self.relayer_account = Account.from_key(self.relayer_private_key)
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async def execute_vault_transaction(
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self,
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vault_address: str,
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target_market: str,
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call_data: str,
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value: int = 0
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) -> str:
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"""
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通过 Relayer 调用用户 Vault 的 execute() 函数
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"""
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try:
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vault_checksum = self.w3.to_checksum_address(vault_address)
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target_checksum = self.w3.to_checksum_address(target_market)
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# 构建 execute(address target, uint256 value, bytes calldata data) ABI 调用
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execute_abi = [{
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"inputs": [
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{"name": "target", "type": "address"},
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{"name": "value", "type": "uint256"},
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{"name": "data", "type": "bytes"}
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],
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"name": "execute",
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"outputs": [{"name": "", "type": "bytes"}],
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"stateMutability": "payable",
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"type": "function"
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}]
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vault_contract = self.w3.eth.contract(address=vault_checksum, abi=execute_abi)
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nonce = await self.w3.eth.get_transaction_count(self.relayer_account.address)
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gas_price = await self.w3.eth.gas_price
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data_bytes = bytes.fromhex(call_data[2:]) if call_data.startswith("0x") else bytes.fromhex(call_data)
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tx = await vault_contract.functions.execute(
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target_checksum,
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value,
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data_bytes
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).build_transaction({
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"from": self.relayer_account.address,
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"nonce": nonce,
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"gasPrice": gas_price,
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"chainId": 46630
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})
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signed_tx = self.relayer_account.sign_transaction(tx)
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tx_hash = await self.w3.eth.send_raw_transaction(signed_tx.rawTransaction)
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logger.info(f"Relayer tx submitted: {tx_hash.hex()} for Vault {vault_address}")
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return tx_hash.hex()
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except Exception as e:
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logger.error(f"Failed to execute relayer tx: {e}")
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raise e
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relayer_service = RelayerService()
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