eth_chainId - Cronos RPC Method
Get the chain ID for Cronos. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on Cronos.
Why Cronos? Build on the EVM-compatible Crypto.com blockchain with fast finality and deep Crypto.com ecosystem 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
Request Parameters
This method accepts no parameters.
Response Body
Chain ID in hexadecimal
Code Examples
curl -X POST https://api-cronos-mainnet-archive.n.dwellir.com/YOUR_API_KEY \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"method": "eth_chainId",
"params": [],
"id": 1
}'Related Methods
net_version- Get network versioneth_syncing- Check sync status
debug_traceTransaction
Trace a transaction execution on Cronos. Requires archive node for debugging DeFi protocols, NFT marketplaces, and Crypto.com ecosystem integrations.
eth_syncing
Check the sync status of your Cronos node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.