Chains
Arbitrum One
Arbitrum One, chain 42161. Nova is not registered.
- create
- create("arbitrum")
- family
- EVM · evm
- symbol
- ETH · 18 decimals
- bip44
- 60
- chainId · caip2
- 0xa4b1 · eip155:42161
- explorer
- arbiscan.io
This is Arbitrum One, chain 42161. Arbitrum Nova is a different chain ID and isn't in the registry.
Address format
The EVM format, shared by every EVM chain here: 0x and 40 hex digits, any case. An address that fits Arbitrum One fits the other twelve EVM chains too, and identify says so rather than picking one. The EIP-55 checksum, the one carried in letter case, isn't verified.
import { getChain } from "@agntn/chains";
const chain = getChain("arb");
chain.assertAddress("0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"); // returned unchanged
chain.chainId; // "0xa4b1"
chain.caip2; // "eip155:42161"
Spellings
arbitrum, arb, arb1, Arbitrum One. The key is arbitrum, the rest resolve through getChain.