web3-collections 0.0.4

Alternatives to some of the web3's classes

Web3.py collections

This module providing alternatives to some of the web3's classes

Installation

Install the package using the following command:

pip install -U web3-collections

Alternatives

Class name	Alternative to
MultiEndpointHTTPProvider	HTTPProvider

MultiEndpointHTTPProvider

The constructor gives a list of endpoint URIs. In each http request, it tries to use the current_endpoint to fetch data and if it fails, updates the current endpoint and tries again.

import web3
from web3_collections import MultiEndpointHTTPProvider

endpoint_uris = ['https://rpc.ankr.com/eth', 'https://1rpc.io/eth', 'https://eth.drpc.org', ...]
w3 = web3.Web3(MultiEndpointHTTPProvider(endpoint_uris))

By default auto_update=True and you don't need to use update_endpoint method. But, you can disable auto update and handle it manually:

w3 = web3.Web3(MultiEndpointHTTPProvider(endpoint_uris, auto_update=False))
try:
    w3.eth.get_block('latest')
except Exception as e:
    print(f'{w3.provider.current_endpoint} got error: {e}')
    w3.provider.update_endpoint()
    print(f'Endpoint updated to {w3.provider.current_endpoint}')

Method MultiEndpointHTTPProvider.sort_endpoints sorts the endpoints by their latest block number (most updated will choose as current_endpoint):

>>> endpoint_uris = [
...  'https://arbitrum.meowrpc.com',
...  'https://1rpc.io/arb',
...  'https://arbitrum-one-rpc.publicnode.com',
...  'https://arb-pokt.nodies.app'
... ]
>>> w3 = web3.Web3(MultiEndpointHTTPProvider(endpoint_uris))
>>> w3.provider.current_endpoint  # before sorting
'https://arbitrum.meowrpc.com'
>>> w3.provider.sort_endpoints()  # sorting by latest block number
>>> w3.provider.current_endpoint  # after sorting
'https://arbitrum-one-rpc.publicnode.com'