eth_chainId - Avalanche RPC Method
Get the chain ID for Avalanche. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on Avalanche.
Why Avalanche? Build on the fastest smart contract platform with sub-second finality and customizable L1 subnets with sub-second finality, Evergreen subnets for institutions, and partnerships with Franklin Templeton, VanEck, and Bergen County.
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 Avalanche. Requires archive node for debugging institutional RWA tokenization ($18B+ transfer volume), gaming subnets, and enterprise blockchains.
eth_syncing
Check the sync status of your Avalanche node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.