web3.py | python interface for interacting with the Ethereum | Cryptocurrency library

by ethereum Python Version: v3.11.1 License: MIT

X-Ray Key Features Code Snippets(10)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | web3.py Summary

web3.py is a Python library typically used in Blockchain, Cryptocurrency, Ethereum applications. web3.py has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can install using 'pip install web3.py' or download it from GitHub, PyPI.

A Python library for interacting with Ethereum, inspired by web3.js.

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Quality

Security

License

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Support

web3.py has a medium active ecosystem.

It has 4289 star(s) with 1514 fork(s). There are 117 watchers for this library.

It had no major release in the last 12 months.

There are 203 open issues and 1130 have been closed. On average issues are closed in 165 days. There are 33 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of web3.py is v3.11.1

Quality

web3.py has 0 bugs and 0 code smells.

Security

web3.py has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

web3.py code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

web3.py is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

web3.py releases are available to install and integrate.

Deployable package is available in PyPI.

Build file is available. You can build the component from source.

Installation instructions are available. Examples and code snippets are not available.

web3.py saves you 3211 person hours of effort in developing the same functionality from scratch.

It has 6902 lines of code, 630 functions and 150 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed web3.py and discovered the below as its top functions. This is intended to give you an instant insight into web3.py implemented functionality, and help decide if they suit your requirements.

Get event logs
Find an event that matches the ABI
Construct the filter parameters for an event
Construct filter params
Creates a middleware that returns the latest block - based cache
Generate a cache key for the given value
Check if the given method is a valid block number
Handle an OffchainLookup payload
Replace old key with new name
Sets the value of a key
Return a gas price strategy
Return an async contract factory
Create a local filter middleware
Constructs a middleware middleware for a given method
Set the value of a key
Fill default values for transaction defaults
Returns a Dependencies instance
Returns ipc
Insert an element into the queue
Returns a dict containing the deployed deployments
Create a Contracting checking factory
Setup a new name
Create a new name
Call the contract function
Calls the contract function
Constructs a middleware that returns a middleware that can be used to cache requests

Get all kandi verified functions for this library.

web3.py Key Features

No Key Features are available at this moment for web3.py.

web3.py Examples and Code Snippets

Python usage,ERC-20 token example

Python

Lines of Code : 60

License : No License

Copy

import pytest
from web3 import Web3, EthereumTesterProvider

from eth_hentai.token import create_token


@pytest.fixture
def tester_provider():
    return EthereumTesterProvider()


@pytest.fixture
def eth_tester(tester_provider):
    return tester_p

ETHome,Quickstart

Python

Lines of Code : 28

License : Weak Copyleft (LGPL-3.0)

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import json
from solc import compile_source
from web3 import Web3, HTTPProvider

fr = open('CommunityController.sol')
contract_source_code = fr.read()
fr.close()

compiled_sol = compile_source(contract_source_code)
contract_interface = compiled_sol['

Usage

Python

Lines of Code : 15

License : Strong Copyleft (AGPL-3.0)

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from skale import SkaleManager
from skale.wallets import Web3Wallet
from skale.utils.web3_utils import init_web3

web3 = init_web3(ENDPOINT)
wallet = Web3Wallet(private_key, web3)
skale = Skale(ENDPOINT, ABI_FILEPATH, wallet)

from skale import Skale

python sintax problem for solidity compilator

Python

Lines of Code : 2

License : Strong Copyleft (CC BY-SA 4.0)

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solc_version="0.8.13",

Compute the LP Address of a token pair using web3.py

Python

Lines of Code : 9

License : Strong Copyleft (CC BY-SA 4.0)

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pair_traded = [token_a, token_b] #token_a, token_b are the address's
pair_traded.sort()

hexadem_1 = 0xff
abiEncoded_1 = encode_abi_packed(['address', 'address'], (token_list[0], token_list[1] ))
salt_ = w3.solidityKeccak(['bytes'], ['0x'

PIP failed to build package cytoolz

Python

Lines of Code : 4

License : Strong Copyleft (CC BY-SA 4.0)

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python -m pip install --user cython
python -m pip install --user cytoolz
python -m pip install --user eth-brownie

PYPY venv pip ERROR: ModuleNotFoundError: No module named 'pip._vendor.six'

Python

Lines of Code : 3

License : Strong Copyleft (CC BY-SA 4.0)

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pypy3 -m venv /tmp/venv
source /tmp/venv/bin/activate

The transaction declared chain ID 5777, but the connected node is on 1337

Python

Lines of Code : 9

License : Strong Copyleft (CC BY-SA 4.0)

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transaction = 
 SimpleStorage.constructor().buildTransaction( {
    "gasPrice": w3.eth.gas_price, 
    "chainId": chain_id, 
    "from": my_address, 
    "nonce": nonce, 
})
print(transaction)

KeyError: 'name' abi error on web3 Python

Python

Lines of Code : 10

License : Strong Copyleft (CC BY-SA 4.0)

Copy

def filter_by_name(name: str, contract_abi: ABI) -> List[Union[ABIFunction, ABIEvent]]:

    for abi in contract_abi:
        print(abi)
        print('---')

    # ... rest ...

{'stateMutability': 'payable', 't

How to filter for ethereum address

Python

Lines of Code : 25

License : Strong Copyleft (CC BY-SA 4.0)

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async function checkBlock(address) {
    const block = await web3.eth.getBlock('latest');
    console.log(`Checking new block ${block.number}`);

    for (let txHash of block.transactions) {
        const tx = await web3.eth.getTransaction

Community Discussions

Trending Discussions on web3.py

Trying to run "brownie run .\scripts\deploy.py --network rinkeby" but getting a ValueError

How to connect to already created ETH wallet using phrase and Web3.py?

How to get an unsigned transaction data from web3.py using contract interaction

Web3.py: ValueError when using pending filter

ValueError: Method eth_maxPriorityFeePerGas not supported, web3.py with ganache

TypeError: 'type' object is not subscriptable web3.py

Interacting with Ethereum smart contracts from Python

Error when deploying a smart contract with w3.eth.contract(): "The method eth_sendTransaction is not supported"

Python Web3 connect to Ankr Binance Smart Chain API, through user and password

Listening to Uniswap contract events using web3.py and infura.io

QUESTION

Trying to run "brownie run .\scripts\deploy.py --network rinkeby" but getting a ValueError

Asked 2022-Mar-01 at 18:15

Hey guys I am trying to deploy my project on the rinkeby chain using infura, but I am getting a ValueError Here is my trackback:

...

ANSWER

Answered 2021-Nov-28 at 10:14

it appears your env variables are not set correctly, and it looks like in this case it's your WEB3_INFURA_PROJECT_ID.

You can fix it by setting the variable in your .env file and adding dotenv: .env to your brownie-config.yaml.

brownie-config.yaml:

dotenv: .env .env:

export WEB3_INFURA_PROJECT_ID=YOUR_PROJECT_ID_HERE Remember to save these files.

Additionally, you should be on at least brownie version v1.14.6. You can find out what version you're on with:

brownie --version

Source https://stackoverflow.com/questions/70098080

QUESTION

How to connect to already created ETH wallet using phrase and Web3.py?

Asked 2022-Jan-19 at 18:21

How to control my already created Ethereum wallet using passphrase and Python with Web3.py?

...

ANSWER

Answered 2022-Jan-19 at 18:21

You can export the private key from the wallet and import in Web3.py

Some examples

Source https://stackoverflow.com/questions/70751732

QUESTION

How to get an unsigned transaction data from web3.py using contract interaction

Asked 2022-Jan-04 at 20:08

Currently I'm working on a project where I have the following flow:

User wants to make a transaction, they choose chain and token.
The contract (possibly proxy contract) and other data is retrieved from the database
I compute the data key, value pair to be used in my front-end call to Metamask

...

ANSWER

Answered 2022-Jan-04 at 20:08

And as always, devs should read better:

replace:

Source https://stackoverflow.com/questions/70583907

QUESTION

Web3.py: ValueError when using pending filter

Asked 2021-Dec-05 at 12:51

I am trying to look up pending transactions in the BEP20 network using web3.py. As stated in in this stack overflow question, one option to do this is using the filter object. Here is a minimal example that should reproduce my problem:

...

ANSWER

Answered 2021-Dec-05 at 12:51

You are using a crappy Binance Smart Chain public node.

It may or may not support your operations. Apparently it doesn't. We cannot do anything about it.

Please write this question to the Binance support, as Ethereum community cannot help you with nodes run by private parties.

Source https://stackoverflow.com/questions/70234159

QUESTION

ValueError: Method eth_maxPriorityFeePerGas not supported, web3.py with ganache

Asked 2021-Nov-24 at 23:22

I'm running the following code with web3.py:

...

ANSWER

Answered 2021-Nov-24 at 23:22

This is an issue from a new edition of web3.py.

You need to add gasPrice to your transaction, like so:

Source https://stackoverflow.com/questions/70104101

QUESTION

TypeError: 'type' object is not subscriptable web3.py

Asked 2021-Nov-22 at 07:45

Hey I am getting TypeError: 'type' object is not subscriptable when trying to print SimpleStorage.I am using env, my python version is 3.10.0 n the library is web3.py idk if this is enough this is my first q on stakeoverflow

...

ANSWER

Answered 2021-Nov-22 at 07:36

use () instead of []. Using [] treats it as a subscriptable object/container, meaning they contain other objects. Like strings, lists, tuples, and dictionaries.

Source https://stackoverflow.com/questions/70062196

QUESTION

Interacting with Ethereum smart contracts from Python

Asked 2021-Jun-03 at 06:37

What Python Ethereum client is meant for smart contract interaction ?
(mostly ERC20 tokens methods balanceOf, transfer)

I guess web3.py is older and low level close to JSON RPC.
But newer Trinity in in alpha.

The Trinity client is currently in an alpha release stage and is not suitable for mission critical production use cases.

...

ANSWER

Answered 2021-Jun-03 at 06:35

You do not need a "client", or run your own "node", you need a library and some API service provider.

Try Brownie and Web3.py.

For JSON-RPC API services check Ethereum nodes.

Source https://stackoverflow.com/questions/67781988

QUESTION

Error when deploying a smart contract with w3.eth.contract(): "The method eth_sendTransaction is not supported"

Asked 2021-May-21 at 07:59

I'm using Web3.py, and a permissioned Hyperledger Besu network.

When trying to use w3.eth.contract(...) method to deploy a smart contract into the network, I get the following error:

...

ANSWER

Answered 2021-May-11 at 08:17

You are likely to use Infura node or similar.

You need to sign the transaction locally with Web3.py and have your app to manage the private key for you.

Source https://stackoverflow.com/questions/67477675

QUESTION

Python Web3 connect to Ankr Binance Smart Chain API, through user and password

Asked 2021-May-10 at 10:38

Maybe this is a dumb question but for web3.js there is the option to use another API service Ankr, instead of Infura. Ankr gives access to BSC network which has lower fees. I cannot seem to figure out how to connect to Ankr through python web3 as it requires authentication with a username and password. It returns false when I run the python code. I am not sure which keys I am suppose to use for web3.py, or possibly the syntax for the call is wrong, when I use the requests library everything works fine so it is not an issue with the address.

...

ANSWER

Answered 2021-May-10 at 10:38

You should save the headers on a Session object, and pass it as a parameter of HTTPProvider

Source https://stackoverflow.com/questions/67336484

QUESTION

Listening to Uniswap contract events using web3.py and infura.io

Asked 2020-Dec-06 at 11:24

I want to use web3.py and infura.io to listen for Uniswap factory events however I am not too sure where to go about doing so.

Here is a link: https://uniswap.org/docs/v2/smart-contracts/factory/

More specifically I want to listen for the PairCreated event.

...

ANSWER

Answered 2020-Jun-25 at 08:22

Here is rough guide

Get ABI for Uniswap contract
Create a web3.py contract object
You can use web3.eth.getLogs() to query events over past block range
You cannot query all events once, because there are so many events and Infura would time out. Instead you need to query events carefully over a block range slices.

Here is some old code which may or may not work with the latest web3.py versions

https://github.com/TokenMarketNet/sto/blob/master/sto/ethereum/scanner.py#L153

If you want a real time scanner you can listed to events over a WebSocket connection as they happen:

https://web3py.readthedocs.io/en/stable/filters.html#asynchronous-filter-polling

Source https://stackoverflow.com/questions/62377210

Community Discussions, Code Snippets contain sources that include Stack Exchange Network