async_web3.py

Asynchronous wrapper of Web3 class that makes queries, builds transactions, calls contract functions, broadcasts transactions and fetches event logs asynchronously.

Features

• Custom AsyncWebsocketProvider that supports eth_subscribe and eth_unsubscribe RPC methods, listening to newHeads, newPendingTransactions and logs.
• Custom MulticallHTTPProvider that automatically combines concurrent eth_call requests into a single call to Multicall contract.

Environment Setup

Define the following in .env according to the chain you use

WEB3_INFURA_PROJECT_ID=
WEB3_INFURA_SCHEME=https
WEB3_WS_PROVIDER_URI=
NETWORK=goerli
BLOCK_EXPLORER=https://api-goerli.etherscan.io/
EXPLORER_API_KEY=

Install dependencies

pip install -r requirements.txt
pip install websockets~=11.0.3