Ethereum Transfer Editing in the BEP20 chain using Web3 in Python
As a developer and longtime user of Ethereum, I recently found a problem when I tried to transfer USDT from my main wallet to another using the Python Web3 library. In this article we will deepen in the details of the problem and provide a solution.
The question:
The error message shows that there is a problem with the generation or verification of HASH of the Transaction (Txhash) from the Web3 library. The exact error message is:
`
It is not possible to send USDT to the BEP20 chain using Web3
`
This suggests that the contract, which deals with the USDT transfer to the BEP20 chain, is not compatible with Ethereum Mainnet.
Code:
Here’s a simplified example of how the code can be:
`Python
Import Web3
Configure the Web3 library
W3 = Web3.Web3 ()
Contact Ethereum Mainnet
W3.etwallet (“mainnet”)
Get the USDT transfer contract address
Contract_addr = W3.ETH.getContatat (‘0x …’, ‘0x …’)
Set the USDT value and destination address
USDT_amount = 10 ** 18
destination_addr = “0x …”
Complete the transaction
tx_hash = w3.eth.sendransction (
{
‘De’: ‘mainnet’,
‘To’: Destination_Addr,
‘Value’: USDT_amount * 1E18,
“Gasprice ‘: W3.towei (‘ 20 ‘,’ Gwei ‘),
‘Nonce’: w3.eth.gettransactationCount (w3.eth.getwallet (‘mainnet’),
},
{
‘Signed’: {‘address’: ‘0x …’},
}
))
Print (“Transaction hash:”, tx_hash.hex ())
`
The problem:
In this code, we try to send USDT from the main portfolio to a contract in the BEP20 chain. The problem arises when we use the function W3.eth.getContratratrat () to obtain the contract address until the USDT is transferred. However, Ethereum contracts are executed with specific addresses that do not correspond to the address of the main portfolio.
Decision:
To correct this problem, you must apply the contract to another Ethereum network, such as Ropsten or Rinkeby, and then use the W3.etContcontratrat () function to obtain the contract address to the transfer of USDT. Here’s an updated example:
`Python
Import Web3
Configure the Web3 library
W3 = Web3.Web3 ()
Contact Ethereum Mainnet
W3.etwallet (“mainnet”)
Determine contract address Bep20 and Abbi
Contract_addr_Bep20 = w3.eth.getContatat (‘0x …’, ‘0x …’)
Abbi = {
‘Constant’: True,
“Records”: [
{‘Name’: ‘_Value’, ‘type’: ‘uint256’},
{‘Name’: ‘_to’, ‘type’: ‘address’},
{‘Name’: ‘Value’, ‘Type’: ‘uns256’},
],
“Statemutability”: “View”,
“Type”: “function”,
}
Implant the BEP20 contract
Contract = W3.ETH.DeplayContract (ABI, [Contract_Addr_Bep20]))
Set the USDT value and destination address
USDT_amount = 10 ** 18
Complete the transaction
tx_hash = Contract.functions.usdttransfer (USDT_amount) .transact ()
Print (“Transaction hash:”, tx_hash.hex ())
`
In this updated example, we executed the ROPSEN BEP20 contract using W3.eth.DeplayContract (). We then use Contract.functions.usdttransfer () to obtain USDT transfer functionality and to execute the transaction.
Conclusion:
In conclusion, when you are trying to send USDT from one major portfolio to another using the Python Web3, you must apply the contract to another Ethereum network and update the contract address to the agreement. Following these steps, you can successfully solve the problem and transfer USDT to the main network portfolios.
Observation:
Check the Ethereum account settings to make sure they are compatible with the other’s networks (such as Mainnet vs. Ropsten). Also, always check that the contract is also addressed ABI before you execute contracts on new networks.