web3client 1.1.5

Batteries-included client to interact with blockchains and smart contracts

Batteries-included client to interact with blockchains and smart contracts; used by web3cli and crabada.py.

Features

• Easily create a client to interact with EVM-compatible chains
• Interact with the most popular chains: Ethereum, Binance, Avalanche, Arbitrum One, zkSync Era, and more to come!
• Subscribe to pending transactions in the mempool and new blocks.
• Save gas by setting an upper limit on the base fee.
• Need more flexibility? Use directly the underlying web3.py client.
• Perform ERC20 operations, using the token name (e.g. USDC) instead of address.

Install

pip3 install -U web3client

Examples

Get the latest block on supported blockchains:

from web3factory.factory import make_client

eth_block = make_client("eth").get_latest_block() # Ethereum
bnb_block = make_client("bnb").get_latest_block() # BNB chain
avax_block = make_client("avax").get_latest_block() # Avalanche
arb_block = make_client("arb").get_latest_block() # Arbitrum
era_block = make_client("era").get_latest_block() # zkSync Era

Get the ETH and USDC balances of the Ethereum foundation:

from web3factory.factory import make_client, make_erc20_client

address = "0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"
eth = make_client("eth").get_balance_in_eth(address)
usdc = make_erc20_client("USDC", "eth").balanceOf(address) / 10**6

Get the BNB and BUSD balances of Binance's hot wallet:

from web3factory.factory import make_client, make_erc20_client

address = "0x8894e0a0c962cb723c1976a4421c95949be2d4e3"
bnb = make_client("bnb").get_balance_in_eth(address)
busd = make_erc20_client("BUSD", "bnb").balanceOf(address) / 10**18

More examples

Please have a look at the tests folder or at the examples folder 🙂

Custom chains & contracts

The factory module only allows to interact with a small list of chains and contracts.

To interact with an arbitrary EVM chain or smart contract, instantiate a custom client using the BaseClient class.

For a more structured approach, use web3core, a sub-package of web3cli that comes with many preloaded chains, and allows to import chains and smart contracts dynamically.

It doesn't work 😡

Don't panic! Instead...

1. Please check if your issue is listed in the Issues tab.
2. If not, consider writing a new issue 🙂

Contributing

All contributions are welcome! To start improving web3client, please refer to our contribution guide.