eth_chainId - BSC RPC Method
Get the chain ID for Binance Smart Chain. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on Binance Smart Chain.
Why BSC? Build on the third-largest blockchain by market cap with $12B+ TVL and 37%+ DEX market share with sub-$0.10 fees, 2.6M daily active users, full EVM compatibility, and direct Binance integration.
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 Binance Smart Chain. Requires archive node for debugging high-frequency DeFi (PancakeSwap), NFT marketplaces, and GameFi applications.
eth_syncing
Check the sync status of your Binance Smart Chain node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.