Chain info | Monad

The chain info JSON RPC methods allow developers to access chain-specific information on Monad, such as the chain ID for transaction signing and replay protection.

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Retrieving chain information from the Monad blockchain can be done by using the following methods:

eth_chainId

eth_syncing

This information can be used for:

• Transaction signing — ensure transactions are signed with the correct chain ID for replay protection.
• Network identification — verify the connected network (mainnet vs testnet).
• Multi-chain applications — correctly route transactions in applications supporting multiple networks.