Chain ID

A chain ID is the integer that uniquely identifies an EVM network so wallets and signed transactions cannot be replayed on the wrong one. Robinhood Chain mainnet is chain ID 4663 (0x1237), reachable at https://rpc.mainnet.chain.robinhood.com; the testnet is 46630 (0xb626). Adding the network to a wallet means registering this ID, the RPC URL, ETH as the currency, and the Blockscout explorer.