The eth_chainId method returns the chain ID of the current network. The chain ID is a unique identifier for different Celo networks (42220 for Celo Mainnet, 44787 for Alfajores testnet) and is crucial for preventing replay attacks across different networks.

This method is essential for wallet applications and transaction signing to ensure transactions are executed on the intended network. By including the chain ID in the transaction signature (as defined in EIP-155), transactions signed for one network cannot be replayed on another network, protecting users from cross-chain replay attacks. Applications should verify the chain ID matches their expected network before signing or broadcasting transactions.

Parameters

This method does not require any parameters.

Return Object

field	type	description
result	string	The chain ID encoded as a hexadecimal string. For Celo networks: 0xa4ec (42220) for Celo Mainnet, 0xaef3 (44787) for Alfajores testnet.

Request Example

Request

Response Example

Response

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