Web3.py is a library for interacting with EVM based blockchains and smart contracts in Python.
For more information see Web3.py documentation.
Web3.py is maintained by Ethereum Foundation.
Questions tagged [web3py]
578 questions
2
votes
1 answer
Web3.py transactions are not broadcast on Ethereum Rinkby testnet
I am using the web.py code below to try and send a transaction with 1 ETH on the Rinkeby testnet via a local geth node. I can see the transactions as submitted in live local ethereum node log stream, but they don't ever seem to be broadcast to the…
Initial Commit
- 497
- 3
- 14
2
votes
1 answer
How to connect web3 to main ethereum network using python?
I am using web3.py on my private/test network though:
from web3 import Web3, HTTPProvider
w3 = Web3(HTTPProvider("https://private-ip:8545"))
For making connection to my private network i use this method and
after performing all the oprations and…
Abdullah Ahmed Ghaznavi
- 1,978
- 3
- 17
- 27
2
votes
1 answer
How to transfer tokens between wallets using geth
I've been struggling for the last couple of days trying to make a transfer of a customized token between 2 ethereum wallets.
I am using populus (python) and It seems to be quite easy to make an ETH transfer but I couldn't understand how to do the…
Pedro Lobito
- 94,083
- 31
- 258
- 268
2
votes
1 answer
Unable to unlock account with Parity and Web3 on the testnet
I'm running a local Parity node for the testnet (Ropsten) on Debian (Jessie). I'm using web3.py to connect to this node and create transactions.
I've created a new account:
parity account new --chain ropsten
I'm running my parity node with the…
Timon
- 2,682
- 1
- 20
- 33
1
vote
1 answer
Connecting 3rd party nodes to Bitcoinlib
I have this node endpoint that requires JSON-RPC payload:
https://btc.getblock.io/my_api_key/testnet/
I have not been able to connect this node to the Bitcoinlib Python module.
I have tried to connect this node to the Bitcoinlib module. I however…
Fluxx
- 15
- 4
1
vote
1 answer
How to get web3py transaction complete
Where is a mistake?
while True:
balance = w3.eth.get_balance(pubadd)
gasPrice = w3.to_wei('55', 'gwei')
gasLimit = 2000000
nonce = w3.eth.get_transaction_count(pubadd)
tx = {
'nonce': nonce,
…
areza
- 11
- 1
1
vote
1 answer
Getting DNS data from ENS using `web3.py`
I am trying to get the DNS records for an ETH domain name, e.g. get the IPv4 addresses for james.eth
I have web3.py installed & working & have an RPC account with Alchemy set up & working. I can get the block address of a ETH name, but I can't find…
James Stevens
- 374
- 2
- 8
1
vote
1 answer
Create an account on polygon pos blockchain using python
I want to get the mnemonics to create the phrase key; the private key from the mnemonics and the address.
I tried using web3.py and it was creating a node in Ethereum blockchain which was accessible in the polygon testnet but wanted to do that in…
Shubhankar Banerjee
- 11
- 2
1
vote
1 answer
AsyncEventFilterBuilder.deploy raises "Invalid web3 argument" when provided with AsyncWeb3 instance
Providing an instance of AsyncWeb3 to async event builder
AsyncEventFilterBuilder.deploy(AsyncWeb3)
raises ValueError: Invalid web3 argument: got:
adam
- 159
- 9
1
vote
0 answers
Python web3 OneSplit (1inch) contract SWAP error: Fail with error 'SafeERC20: low-level call failed'
I'm trying to execute a swap by Onesplit contract at:
0xC586BeF4a0992C495Cf22e1aeEE4E446CECDee0E
Here is my Python (web3) code:
transaction = onesplit_abi_contract.functions.swap(
'0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2', #WETH…
Edoardo Calderoni
- 56
- 6
1
vote
0 answers
ContextualVersionConflict error message when using "web3" on google colab
pip install protobuf==4.21.6
Successfully installed protobuf-4.21.6
pip install web3
Successfully installed
pip freeze | grep protobuf
protobuf==4.21.6
from web3 import…
servet akay
- 11
- 1
1
vote
1 answer
Web3.py contract owner address return null address
I am trying to get the owner's address of a contract, but the address is always coming back with a 0x0000000000000000000000000000000000000000 address. Can someone validate if I am missing something in my code to be able to parse the address?
The API…
Geo
- 3,160
- 6
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- 82
1
vote
1 answer
How to decode transaction log data
With Python, how can I decode the topics from an Ethereum transaction log?
rec = w3.eth.getTransactionReceipt('0x034...').logs #reading the logs of a transaction
rec[4]["topics"]
Getting HexBytes, how to convert that into a human readable…
Peter
- 11
- 2
1
vote
1 answer
web3.py function get_block tranactions is not in the current block
I want to synchronize all transactions with the database, so I use get_ Block method. The code is as follows：
cur_block_num = web3.eth.get_block_number()
if cur_block_num <= last_block_num:
return
res =…
zl zero
- 13
- 2
1
vote
1 answer
Can enum be extended in upgradeable contract?
Can enum be extended in upgradeable contract, adding new value into the enum? If it can be extended, what are the consideration I should do before extending the enum?
Gowtham Paramasivam
- 65
- 10