eth_chainId - Blast RPC Method
Get the chain ID for Blast. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on Blast.
Why Blast? Build on the only Ethereum L2 with native yield—4% for ETH and 5%+ for stablecoins automatically with $2.5B+ TVL, auto-rebasing ETH and USDB, gas revenue sharing for developers, and Blur-backed ecosystem.
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 Blast. Requires archive node for debugging yield-generating dApps, DeFi protocols with built-in returns, and gas-subsidized applications.
eth_syncing
Check the sync status of your Blast node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.