# Coinbase的L2 Base 纪念nft mint 代码示例


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

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上篇文章写了存款的代码示例，这次来讲下如何mint主网的纪念nft:

[https://mirror.xyz/0x7b52FD04cC45B26F5bdea1CD7c8c56A00A3F859B/IeEw0Qp3MYbwFZx111fi1J25Dm8JLcm6avEHv\_72R-0](https://mirror.xyz/0x7b52FD04cC45B26F5bdea1CD7c8c56A00A3F859B/IeEw0Qp3MYbwFZx111fi1J25Dm8JLcm6avEHv_72R-0)

这是mint网址， mint需要花0.000777 哥ETH，大概1.28u

[https://zora.co/collections/0xd4307e0acd12cf46fd6cf93bc264f5d5d1598792](https://zora.co/collections/0xd4307e0acd12cf46fd6cf93bc264f5d5d1598792)

以下为python3代码样例:

    """
    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 = 'xxxxxxx' # 这里替换成自己的私钥
        account = web3.Account.from_key(privkey)
        rpc = Rpc(rpc='https://rpc.ankr.com/eth', chainid=1)
        amount = 0.000777 # 要存款的数量
        gaslimit = 116900 # gaslimit
        mint_nft_token = '0xd4307e0acd12cf46fd6cf93bc264f5d5d1598792' # base存款的合约地址
        method = '0xefef39a1' # mint nft 方法hash值
        uint_1 = '0000000000000000000000000000000000000000000000000000000000000001'
        data = method + uint_1 # 拼接数据
        amount = hex(int(amount * math.pow(10, 18))) # 处理amount值
        res = rpc.transfer(account, to=mint_nft_token, amount=amount, gaslimit=gaslimit, data=data) # 发送交易
        print(res)
    

通过交易hash在eth 浏览器查看状态

![](https://storage.googleapis.com/papyrus_images/3c9779fe6d54ec4ec2360bee7699107cf9913fd2d915e48c51da7f3d200351f6.png)

现在mint nft gas费有点高，花了6u，肉疼。建议大家在低gas费时参与mint

代码样例已上传:

[

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

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