Get TRC20 balance and Transfer TRC20 tokens

trc20.py

import requests
import base58
import base64
from pprint import pprint


ADDRESS = "T....your address"
PRIV_KEY = 'hex private key'

CONTRACT = "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t"  # USDT
CONTRACT = "T,,,,,,,,,,,,,,,,,,,,,,ia"

API_URL_BASE = 'https://api.trongrid.io/'
# API_URL_BASE = 'https://api.shasta.trongrid.io/'
# API_URL_BASE = 'https://api.nileex.io/'

# 70a08231: balanceOf(address)
METHOD_BALANCE_OF = 'balanceOf(address)'

# a9059cbb: transfer(address,uint256)
METHOD_TRANSFER = 'transfer(address,uint256)'


DEFAULT_FEE_LIMIT = 1_000_000  # 1 TRX


def address_to_parameter(addr):
    return "0" * 24 + base58.b58decode_check(addr)[1:].hex()


def amount_to_parameter(amount):
    return '%064x' % amount


def get_balance(address=ADDRESS):
    url = API_URL_BASE + 'wallet/triggerconstantcontract'
    payload = {
        'owner_address': base58.b58decode_check(ADDRESS).hex(),
        'contract_address': base58.b58decode_check(CONTRACT).hex(),
        'function_selector': METHOD_BALANCE_OF,
        'parameter': address_to_parameter(address),
    }
    resp = requests.post(url, json=payload)
    data = resp.json()

    if data['result'].get('result', None):
        print(data['constant_result'])
        val = data['constant_result'][0]
        print('balance =', int(val, 16))
    else:
        print('error:', bytes.fromhex(data['result']['message']).decode())


def get_trc20_transaction(to, amount, memo=''):
    url = API_URL_BASE + 'wallet/triggersmartcontract'
    payload = {
        'owner_address': base58.b58decode_check(ADDRESS).hex(),
        'contract_address': base58.b58decode_check(CONTRACT).hex(),
        'function_selector': METHOD_TRANSFER,
        'parameter': address_to_parameter(to) + amount_to_parameter(amount),
        "fee_limit": DEFAULT_FEE_LIMIT,
        'extra_data': base64.b64encode(memo.encode()).decode(),  # TODO: not supported yet
    }
    resp = requests.post(url, json=payload)
    data = resp.json()

    if data['result'].get('result', None):
        transaction = data['transaction']
        return transaction

    else:
        print('error:', bytes.fromhex(data['result']['message']).decode())
        raise RuntimeError


def sign_transaction(transaction, private_key=PRIV_KEY):
    url = API_URL_BASE + 'wallet/addtransactionsign'
    payload = {'transaction': transaction, 'privateKey': private_key}
    resp = requests.post(url, json=payload)

    data = resp.json()

    if 'Error' in data:
        print('error:', data)
        raise RuntimeError
    return data


def broadcast_transaction(transaction):
    url = API_URL_BASE + 'wallet/broadcasttransaction'
    resp = requests.post(url, json=transaction)

    data = resp.json()
    print(data)


def transfer(to, amount, memo=''):
    transaction = get_trc20_transaction(to, amount, memo)
    pprint(transaction)
    transaction = sign_transaction(transaction)
    broadcast_transaction(transaction)


get_balance()

transfer('T..............q', 5_000, 'test from python')

Thanks for your help, according to your last email I already did it successfully without any issue the issue comes when I want to send from a multi-signiture address

from tronpy import Tron
from tronpy.keys import PrivateKey

client = Tron(network='nile', conf={'fee_limit': 10_000_000})

priv_key = PrivateKey(bytes.fromhex("e5f4a4acb3ecef9e8589d69c1aa9fa5723b04ff724b1c04ebe6cd746b241ad04"))
contractAddress = 'TLBaRhANQoJFTqre9Nf1mjuwNWjCJeYqUL'
myAddress = 'TGihHToJJ9B1NFi2Vx5bTM8muRmsbdAaJ8'
contract = client.get_contract(contractAddress)

oneUSDJ = 1_000_000_000_000_000_000

class Tron:
    def __init__(self):
        self.contract = contract
        self.myAdd = myAddress

    def getTokenBalance(self):
        return contract.functions.balanceOf(myAddress) / 10 ** 6

    def getBalance(self, address):
        return client.get_account_balance(address)

    def getAccount(self, address):
        return client.get_account(address)


    def sendTRX(self, accountAddress):
        txn = (
            client.trx.transfer(myAddress, accountAddress, 100_000_000)
                .with_owner(myAddress)
                .permission_id(2)
                .build()
                .sign(priv_key)
        )

        print(txn.txid)
        print(txn.broadcast().wait())
        return txn

tron = Tron()

I included permission_id but I got this error:

>>> tron.sendTRX('TC2r7dPEfMaMt8ToJ3rQ7SuVhX391cFhv5')
{'address': '414a0a401872a17daf91e753226e8981e434e97452', 'weight': 1}
a6c802ca8cbfd1562e6203a43437b98f30aef7b09f2d968be213afe56746c864
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\itk\dev\test\tronpy\example1.py", line 38, in sendTRX
    print(txn.broadcast().wait())
  File "C:\Users\itk\dev\test\venv\lib\site-packages\tronpy\tron.py", line 154, in broadcast
    return TransactionRet(self._client. Broadcast(self), client=self._client, method=self._method)
  File "C:\Users\itk\dev\test\venv\lib\site-packages\tronpy\tron.py", line 827, in broadcast
    self._handle_api_error(payload)
  File "C:\Users\itk\dev\test\venv\lib\site-packages\tronpy\tron.py", line 467, in _handle_api_error
    raise BadSignature(msg)
tronpy.exceptions.BadSignature: Validate signature error: sig error

this work perfect for me

`from tronpy import Tron, keys
from tronpy.providers import HTTPProvider

def usdt_to_sun(usdt_amount):
return int(usdt_amount * 1000000)

api_key="03c79334-***-979d-e6fad028f4d5" # Get it from https://www.trongrid.io/dashboard
to_address = "TR34fCKkk998toiF4YFRGmHrzdvCrcZNgY" # Where you want to send your USDT
amount = usdt_to_sun(500) # The amount of USDT to send

secret_key = ''
with open("secret_key.txt", "r") as secret_key_file: #this will inport secret_key.txt with your private jey
secret_key = secret_key_file.read().strip()

tron = Tron(HTTPProvider(api_key=api_key))

contract_address = 'TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t' # USDT token on mainnet

abi = [{
"outputs":[
{
"type":"bool"
}
],
"inputs":[
{
"name":"_to",
"type":"address"
},
{
"name":"_value",
"type":"uint256"
}
],
"name":"transfer",
"stateMutability":"Nonpayable",
"type":"Function"
}]

contract = tron.get_contract(contract_address)
contract.abi = abi

if secret_key:
try:
wallet = keys.PrivateKey(bytes.fromhex(secret_key))
from_address = wallet.public_key.to_base58check_address()
txn = (
contract.functions.transfer(to_address, amount)
.with_owner(from_address)
.fee_limit(50_000_000)
.build()
.inspect()
.sign(wallet)
.broadcast()
)

    txn.wait()

    print(txn)
except Exception as e:
    exit(f"Submit failed: {e}")

`