eth_chainId

Returns the currently configured chain ID, a value used in replay-protected transaction signing as introduced by EIP-155.

The chain ID returned should always correspond to the information in the current known head block. This ensures that caller of this RPC method can always use the retrieved information to sign transactions built on top of the head. 
If the current known head block does not specify a chain ID, the client should treat any calls to eth_chainId as though the method were not supported, and return a suitable error.
You should prefer eth_chainId over net_version, so that you can reliably identify the chain you are communicating with.
Parameters
None
Returns
QUANTITY(hex string) - integer of the current chain ID.
Example
Request
curl
TypeScript
curl https://api.blockvision.org/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{
    "jsonrpc": "2.0",
    "method": "eth_chainId",
    "params": [],
    "id": 83
}'
import { BlockVisionProvider, BvNetwork } from 'blockvision.js'
​
// Optional parameters, but default to eth-mainnet and default api-key.
const bv = new BlockVisionProvider(BvNetwork.POL_MAINNET)
​
// Access BlockVision Enhanced API requests
bv.getChainId().then(console.log)
Result
{
    "jsonrpc": "2.0",
    "id": 83,
    "result": "0x1"
}

eth_syncing

eth_feeHistory

Last modified 1mo ago