[英]Python 3, Ethereum - how to send ERC20 Tokens?
我有一些脚本使用从地址发送Ethers到地址。 我使用Parity和Python 3.6。 它使用Flask看起来像:
from flask import Flask, render_template, json, request
import urllib
import requests
import binascii
from decimal import *
app = Flask(__name__)
def Eth(method,params=[]):
data = {"method":method,"params":params,"id":1,"jsonrpc":"2.0"}
headers = {'Content-type': 'application/json'}
r = requests.post(ethrpc, data=json.dumps(data), headers=headers)
r = r.text
response = json.loads(r)
return(response)
hot = str("XXXXXXX")
@app.route('/')
def index():
ethnumbers = int(10)**int(18)
hot = str("XXXXX")
balance = Eth("eth_getBalance",[hot,'latest'])
balance = balance["result"]
balance = int(balance, 16)
balance = float(balance)
balance = balance / ethnumbers
balance = str(balance)
return render_template('index.html',hot = hot,balance=balance)
@app.route('/send/',methods=['POST','GET'])
def send():
getcontext().prec = 28
ethnumbers = Decimal(10)**Decimal(18)
print(ethnumbers)
if request.method == "POST":
_myaddress = request.form['_myaddress']
_youraddress = request.form['_youraddress']
_amount = request.form['_amount']
_gas = request.form['_gas']
_gas = hex(int(_gas))
passy = str("XXXXXXXXX")
getcontext().prec = 28
_amount = Decimal(_amount)
getcontext().prec = 28
_amount = _amount * ethnumbers
getcontext().prec = 28
_amount = int(_amount)
_amount = hex(_amount)
r = [{'from':_myaddress,"to":_youraddress,"value":_amount,"gas":_gas,},str("XXXXXXXXXX!")]
print(r)
json.dumps(r)
resultio = Eth("personal_sendTransaction",r)
try:
resultio["result"]
return render_template('sent.html',resultio=resultio["result"])
except: KeyError
return render_template('sent.html',resultio=resultio["error"]["message"])
else:
return render_template('index.html')
if __name__ == "__main__":
app.run()
我很确定,我必须使用“数据”来做到这一点,但我不知道如何通过这个脚本发送ERC20令牌。 令牌交易的结构看起来像“我的地址 - >令牌地址 - >令牌接收器”。
有任何想法吗?
伙计们看起来比它看起来更简单。 你只需要:
合同地址
作为接收器并创建一个长“数据”字段,它将字符串表示为:
// method name, its constans in erc20
0xa9059cbb
//receiver address (you have to do it without "0x" because its needed only when
//you have to tell "im using hexadecimal". You did it above, in method field.
//so, receiver address:
5b7b3b499fb69c40c365343cb0dc842fe8c23887
// and fill it with zeros, it have to be lenght 64. So fill rest of address
0000000000000000000000005b7b3b499fb69c40c365343cb0dc842fe8c23887
// then you need amount, please convert it to hexadecimal, delete "0x" and
// remember, you need to integer first, so if token has 18 "decimals" it need
// to be amount / 10**18 first!!
//1e27786570c272000 and fill that with zeros, like above:
000000000000000000000000000000000000000000000001e27786570c272000
//just add string, to string, to string, and you have data field:
0xa9059cbb0000000000000000000000005b7b3b499fb69c40c365343cb0dc842fe8c23887000000000000000000000000000000000000000000000001e27786570c272000
示例交易: https : //etherscan.io/tx/0x9c27df8af24e06edb819a8d7a380f548fad637de5edddd6155d15087d1619964
web3.py
肯定是要走的路。 如果你想手动完成并且你只想调用标准的ERC-20 transfer
方法,则from
地址应该保持不变, to
地址应该是令牌契约,然后data
应该是以下连接在一起的格式化为十六进制:
decimals()
函数来检索。)这也应该是格式化为32字节数字(左零填充)。 web3.py
会容易得多。 :-) 就像是:
web3.eth.contract(address, abi=standard_token_abi).sendTransaction({
'from': from_address
}).transfer(to_address, amount)
启动geth
节点并将发布请求发送到JSON-RPC接口,如:
data = {"method": "personal_sendTransaction",
"params":[{
"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
"gas": "0x76c0", // 30400
"gasPrice": "0x9184e72a000", // 10000000000000
"value": "0x9184e72a", // 2441406250
"data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"}],
"id":1,
"jsonrpc":"2.0"
}
headers = {'Content-type': 'application/json'}
r = requests.post('127.0.0.1:8545', data=json.dumps(data), headers=headers)
对于令牌合同,您需要找到合同部署的地址,查看ABI,并确定您需要哪些信息才能调用令牌部署的transfer
方法。
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