eth_chainId - Moonbeam RPC Method
Get the chain ID for Moonbeam. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on Moonbeam.
Why Moonbeam? Build on the cross-chain connected EVM platform on Polkadot with $65M+ TVL and 100+ projects with full EVM compatibility on Polkadot, native XCM cross-chain messaging, 10K+ TPS, 24% staking APR, and $0.015 transaction costs.
Use Cases
The eth_chainId method is essential for:
- Transaction signing - Ensure transactions are signed for the correct network
- Network verification - Confirm connection to the expected chain
- Multi-chain apps - Handle different networks programmatically
- Wallet integration - Validate network before transactions
Code Examples
Related Methods
net_version- Get network versioneth_syncing- Check sync status
debug_traceTransaction
Trace a transaction execution on Moonbeam. Requires archive node for debugging cross-chain DeFi, multi-chain dApps, and Ethereum-to-Polkadot bridging via XCM, Axelar, LayerZero, and Wormhole.
eth_syncing
Check the sync status of your Moonbeam node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.