Optimism

create

create("optimism")

family

EVM · evm

symbol

ETH · 18 decimals

bip44

60

chainId · caip2

0xa · eip155:10

explorer

optimistic.etherscan.io

Chain 10, the original OP Stack chain. The alias is op, two letters people already use.

Address format

The EVM format, shared by every EVM chain here: 0x and 40 hex digits, any case. An address that fits Optimism 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("op");
chain.assertAddress("0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"); // returned unchanged
chain.chainId; // "0xa"
chain.caip2; // "eip155:10"

Spellings

optimism, op, Optimism. The key is optimism, the rest resolve through getChain.