scroll alpha test bridge代码交互

March 3rd, 2023

scroll alpha 网络的交互，目前只有bridge，暂时还没看到其他应用。大家要是有找到L2层上部署的应用，可以发下哈。

python3 代码样例

安装依赖

pip install web3

注意

privkey 改成要交互的私钥
发送后去浏览器上查下tx状态，半天没返回的，就要换下rpc节点，可在 chainlist查看
有个key值暂时不要动，要是tx 状态失败的，还得去合约上查下最新的

import web3
import math
import requests

headers = {
    'content-type': 'application/json',
    'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36',
    }

class Rpc:
    """
    eth rpc方法
    """
    def __init__(self, rpc='https://rpc.ankr.com/eth_goerli', chainid=5, proxies=None, timeout=30):
        self.rpc = rpc
        self.chainid = chainid
        self.proxies = proxies
        self.timeout = timeout

    def get_current_block(self):
        """获取最新区块"""
        data = {"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def get_block_detail(self, number):
        """获取区块hash"""
        if isinstance(number, int):
            number = hex(number)
        data = {"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":[number,True],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def get_transaction(self, txhash):
        """获取的交易详情"""
        data = {"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":[txhash],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def get_gas_price(self):
        """获取gas"""
        data = {"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def get_transaction_count_by_address(self, address):
        data = {"jsonrpc":"2.0","method":"eth_getTransactionCount","params":[address,'latest'],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def call(self, to, data):
        data = {"jsonrpc":"2.0","method":"eth_call","params":[{"to": to, "data": data}, "latest"],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def send_raw_transaction(self, hex):
        """广播交易"""
        data = {"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":[hex],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers,  proxies=self.proxies, timeout=self.timeout)
        return res.json()

    def get_balance(self, address):
        """获取余额"""
        data = {"jsonrpc":"2.0","method":"eth_getBalance","params":[address, 'latest'],"id":1}
        res = requests.post(self.rpc, json=data, headers=headers, proxies=self.proxies, timeout=self.timeout)
        return res.json()#(int(res.json()['result'], 16)) / math.pow(10,18)

    def transfer(self, account, to, amount, gaslimit, **kw):
        """离线交易
        account
        to: 收款地址
        gaslimit: 由当前区块的gaslimit获取
        gasprice: get_gas_price获取
        nonce: 交易总数 get_transaction_count_by_address获取
        chainId: 链id
        """
        amount = int(amount, 16) if isinstance(amount, str) else int(amount)
        gaslimit = int(gaslimit, 16) if not isinstance(gaslimit, int) else gaslimit
        gasprice = int(self.get_gas_price()['result'], 16)
        nonce = int(self.get_transaction_count_by_address(account.address)['result'], 16)
        tx = {'from': account.address, 'value': amount,'to': to, 'gas': gaslimit, 'gasPrice': gasprice, 'nonce': nonce, 'chainId': self.chainid}
        if kw:
            tx.update(**kw)
        signed = account.signTransaction(tx)
        return self.send_raw_transaction(signed.rawTransaction.hex())
    
if __name__ == '__main__':
    privkey = 'xxxxxxxxxxxx' # 这里替换成自己的私钥
    value = 0.1 # 要存款的数量
    account = web3.Account.from_key(privkey)
    BALANCE_PRECISION = math.pow(10, 18) # 主币精度，18位
    rpc = Rpc('https://goerli.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161')
    value = int(value * BALANCE_PRECISION)
    gaslimit = 280000 # gaslimit
    to = '0xe5e30e7c24e4dfcb281a682562e53154c15d3332' # 交互的合约地址
    method = '0x9f8420b3' # 存款方法hash值
    key = 0.0000000625 # key值有可能经常改，昨晚还是0.00000004的
    amount = value + key * BALANCE_PRECISION # 计算要发送的amount
    data = '0x9f8420b3' + hex(value)[2:].rjust(64,'0') + '0000000000000000000000000000000000000000000000000000000000009c40' # 拼接数据
    res = rpc.transfer(account, to=to, amount=amount, gaslimit=gaslimit, data=data) # 发送交易
    print(res)

执行脚本后打印交易hash, 去浏览器查询状态