eth_chainId - Sonic RPC Method
Get the chain ID for Sonic. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on Sonic.
Why Sonic? Build on the world's fastest EVM chain with 720ms finality, $1.2B+ TVL, and 1,534% growth since launch with 720ms transaction finality, 10K TPS, 90% fee sharing via FeeM, Fantom heritage with Andre Cronje leadership.
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
trace_transaction
Get traces for a specific transaction on Sonic. Requires archive node for ultra-fast DeFi, high-frequency trading dApps, and performance-critical applications.
eth_syncing
Check the sync status of your Sonic node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.