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Python 3,以太坊-如何发送ERC20令牌?

parity-io ethereum python-3.x python

Kamil · 技术社区 · 6 年前

我有一些脚本用于将以太从地址发送到地址。Im使用奇偶校验和Python 3.6。它使用的烧瓶看起来像:

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”来实现这一点,但我不知道如何通过这个脚本发送ERC20令牌。令牌事务的结构类似于“我的地址->令牌地址->令牌接收方”。

有什么想法吗?

3 回复 | 直到 6 年前

Kamil 5 年前

伙计们,这比看起来要简单。您只需输入:

合同地址

作为接收器并生成一个长的“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

交易示例: https://etherscan.io/tx/0x9c27df8af24e06edb819a8d7a380f548fad637de5edddd6155d15087d1619964

user94559 6 年前

web3.py 这绝对是一条路要走。如果您想手工操作,只需调用标准ERC-20 transfer 方法 from 地址应保持不变 to 地址应该是令牌合约,然后是 data 应将以下内容串联在一起并格式化为十六进制:

“transfer(address,uint256)”的keccak256散列的前4个字节,它是函数的签名。
收件人的地址,左零填充为32字节。
要转移的金额。(一定要考虑令牌的小数点…1令牌通常是10**18,但小数点的位数因令牌而异,可以通过调用 decimals() 函数。)还应将其格式化为32字节的数字(因此保留零填充)。

web3.py 会容易得多。:-)类似于:

web3.eth.contract(address, abi=standard_token_abi).sendTransaction({
    'from': from_address
}).transfer(to_address, amount)

-1

jmunsch Colin Pickard 6 年前

启动a geth 节点并向JSON-RPC接口发送post请求,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)

就令牌契约而言,您需要找到契约部署的地址,查看ABI,并确定调用 transfer 令牌部署的方法。