eth_chainId - zkSync RPC Method
Get the chain ID for zkSync Era. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on zkSync Era.
Why zkSync? Build on Matter Labs' flagship zkEVM powering the Elastic Network of interoperable hyperchains with ZK Stack modular framework, hyperchain interoperability, native account abstraction, and $1.9B in tokenized real-world assets.
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 zkSync Era. Requires archive node for debugging RWA tokenization ($1.9B, 25% market share), hyperchain deployment via ZK Stack, and cross-chain DeFi.
eth_syncing
Check the sync status of your zkSync Era node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.