eth_chainId | Tempo

POST

eth_chainId

cURL

curl --request POST \
  --url https://tempo-mainnet.core.chainstack.com/c3ce2925b51f1ed18719fe8a23bbdccf/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_chainId",
  "params": [],
  "id": 1
}
'

200

{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}

Tempo API method that returns the chain ID of the current network. The Tempo mainnet chain ID is 4217 (0x1079 in hexadecimal). The Moderato testnet chain ID is 42431 (0xa5bf).

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Parameters

• none

Response

• result — the chain ID encoded as hexadecimal (0x1079 for Tempo mainnet / 0xa5bf for Moderato testnet)

eth_chainId code examples

web3.js

const Web3 = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);

async function getChainId() {
  const chainId = await web3.eth.getChainId();
  console.log(`Chain ID: ${chainId}`);
}

getChainId()

Body

application/json

jsonrpc · string · default: 2.0

method · string · default: eth_chainId

params · any[]

id · integer · default: 1

Response

200 - application/json

The chain ID

jsonrpc · string

id · integer

result · string

The chain ID encoded as hexadecimal (0xa5bd for Tempo testnet)