The isBase utility is designed to verify if the chain id is a valid Base or Base Sepolia chain id.

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Usage

import { isBase } from '@coinbase/onchainkit';

// Base Mainnet (chain ID: 8453)
isBase({ chainId: 8453 }); // returns true

// Base Sepolia (chain ID: 84532)
isBase({ chainId: 84532 }); // returns true

// Ethereum (chain ID: 1)
isBase({ chainId: 1 }); // returns false

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Returns

boolean - Returns true if the chain id is Base or Base Sepolia, otherwise false.

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Parameters

IsBaseOptions - See IsBaseOptions for more details.