Supported Networks

ERC-8004 contracts are deployed via CREATE2, so all mainnets share the same addresses and all testnets share the same addresses.

Mainnets

Network	Chain ID	CAIP-2 ID
Ethereum	1	eip155:1
Base	8453	eip155:8453
Polygon	137	eip155:137
Arbitrum One	42161	eip155:42161
Celo	42220	eip155:42220
Gnosis	100	eip155:100
Scroll	534352	eip155:534352
Taiko (Alethia)	167000	eip155:167000
Monad	143	eip155:143
BNB Smart Chain	56	eip155:56

Testnets

Network	Chain ID	CAIP-2 ID
Ethereum Sepolia	11155111	eip155:11155111
Base Sepolia	84532	eip155:84532
Polygon Amoy	80002	eip155:80002
Arbitrum Sepolia	421614	eip155:421614
Celo Alfajores	44787	eip155:44787
Scroll Sepolia	534351	eip155:534351
Monad Testnet	10143	eip155:10143
BNB Smart Chain Testnet	97	eip155:97

Usage

Select a network when creating the client:

use erc8004::{Erc8004, Network};

// Mainnet
let client = Erc8004::new(provider).with_network(Network::EthereumMainnet);
let client = Erc8004::new(provider).with_network(Network::Base);
let client = Erc8004::new(provider).with_network(Network::Polygon);

// Testnet
let client = Erc8004::new(provider).with_network(Network::BaseSepolia);
let client = Erc8004::new(provider).with_network(Network::EthereumSepolia);

Multi-network Queries

Query the same registry across multiple chains:

use erc8004::{Erc8004, Network};
use alloy::primitives::U256;

let networks = [Network::EthereumMainnet, Network::Base, Network::Polygon];

for network in networks {
    let provider = create_provider_for(network);
    let client = Erc8004::new(provider).with_network(network);
    let identity = client.identity()?;

    match identity.token_uri(U256::from(1)).await {
        Ok(uri) => println!("{network:?}: {uri}"),
        Err(_) => println!("{network:?}: not found"),
    }
}

Custom Network

For networks not in the built-in list, provide contract addresses manually:

use alloy::primitives::address;

let client = Erc8004::new(provider)
    .with_identity_address(address!("0x…"))
    .with_reputation_address(address!("0x…"))
    .with_validation_address(address!("0x…"));