# Coinbase的L2 Base 纪念nft mint 代码示例


**Published by:** [junjie9021](https://paragraph.com/@junjie9021-3/)
**Published on:** 2023-02-25
**URL:** https://paragraph.com/@junjie9021-3/coinbase-l2-base-nft-mint

## Content

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 这是mint网址， mint需要花0.000777 哥ETH，大概1.28u 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 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 Contribute to junjie9021/simple-airdrop-demo development by creating an account on GitHub. https://github.com

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