# Coinbase的L2 Base 存款代码交互


By [junjie9021](https://paragraph.com/@junjie9021-3) · 2023-02-25

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最近看大家在说Coinbase推出了自家L2 Base网络。Base 是一种安全、低成本、对开发人员友好的以太坊 L2，旨在将下一个十亿用户带入 web3。我们用代码的方式来交互下存款。

默认你已经具备以下知识:

*   python3
    

存款示例, 以下是Python3的代码示例:

    """
    安装依赖
    pip3 install web3
    """
    import web3
    import math
    import requests
    
    headers = {
        'content-type': 'application/json',
        'accept-encoding': 'gzip, deflate, br',
        '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_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_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()
    
        def get_transaction_count_by_address(self, address):
            """获取地址nonce"""
            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 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 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 = 'xxxxxxxx' # 这里替换成自己的私钥
        account = web3.Account.from_key(privkey)
        rpc = Rpc()
        value = 0.01 # 要存款的数量
        gaslimit = 100000 # gaslimit
        base_token = '0xe93c8cd0d409341205a592f8c4ac1a5fe5585cfa' # base存款的合约地址
        method = '0xe9e05c42' # 存款方法hash值
        addr_0 = account.address[2:].rjust(64,'0') # 地址格式处理
        amount = int(value * math.pow(10, 18)) # eth的主币精度是18位
        value = hex(amount) # value hex格式处理
        unit_1 = value[2:].rjust(64,'0')
        unit_2 = hex(int(gaslimit))[2:].rjust(64,'0')
        bool_3 = '0000000000000000000000000000000000000000000000000000000000000000'
        unit_4 = '00000000000000000000000000000000000000000000000000000000000000a0'
        unit_5 = '0000000000000000000000000000000000000000000000000000000000000000'
        data = method + addr_0 + unit_1 + unit_2 + bool_3 + unit_4 + unit_5 # 拼接数据
        res = rpc.transfer(account, to=base_token, amount=amount, gaslimit=gaslimit, data=data) # 发送交易
        print(res) # 打印交易hash
    

通过交易hash在Goerli 浏览器查看状态，状态成功后

[https://goerli.etherscan.io/](https://goerli.etherscan.io/)

![](https://storage.googleapis.com/papyrus_images/658ea50a5320a6c5ebbcd6398309fcdae4b100d12fda9f49c91acc434a557a53.png)

再在L2 Base 浏览器查看地址余额数量，检查是否存款

[

Base Göerli blockchain explorer - View Base Göerli stats | Blockscout
---------------------------------------------------------------------

Open-source block explorer by Blockscout. Search transactions, verify smart contracts, analyze addresses, and track network activity. Complete blockchain data and APIs for the Base Göerli (Goerli) Explorer network.

https://base-goerli.blockscout.com

![](https://storage.googleapis.com/papyrus_images/d7cc116b0e3800b3d77dd261c558e0d8aec48f7ee9e42f7d20533ec15d93e400.png)

](https://base-goerli.blockscout.com/)

![](https://storage.googleapis.com/papyrus_images/e9655d17c3ab717fc9a29c4dbf4ef5fd78eebca1193d33d927fcaa23cac9e8d6.png)

代码样例已上传:

[

simple-airdrop-demo/base at main · junjie9021/simple-airdrop-demo
-----------------------------------------------------------------

Contribute to junjie9021/simple-airdrop-demo development by creating an account on GitHub.

https://github.com

![](https://storage.googleapis.com/papyrus_images/a303994f79fc141394f6feea017019eb0e96152879642705dad0f7823815b7af.png)

](https://github.com/junjie9021/simple-airdrop-demo/tree/main/base)

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*Originally published on [junjie9021](https://paragraph.com/@junjie9021-3/coinbase-l2-base)*