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Version: 2.2

eth_chainId

Get ChainId

POSThttps://site1.moralis-nodes.com/:chain/:apiKey

Returns the current chain ID, identifying the current blockchain. The chain ID is a unique identifier for each blockchain and is used for transaction signing to prevent replay attacks across chains.

Note

Please refer to RPC schema page for more details on the RPC params and RPC response definitions of the RPC method.

PATH PARAMS
chainstringrequired
The blockchain to interact with.
apiKeystringrequired
Your API key for authentication.
BODY PARAM
jsonrpcstringrequired
JSON-RPC version (typically 2.0).
idnumberrequired
The request identifier.
methodstringrequired
The JSON-RPC method being invoked.
paramsrpcArrayrequired
Parameters for the method (empty for eth_chainId).
Responses
// Dependencies to install:
// $ npm install node-fetch --save
// add "type": "module" to package.json

import fetch from 'node-fetch';

const options = {
method: 'POST',
headers: {
accept: 'application/json',
'content-type': 'application/json'
},
body: JSON.stringify({
"jsonrpc": "2.0",
"id": 1,
"method": "eth_chainId"
})
};

fetch('https://site1.moralis-nodes.com/eth/YOUR_API_KEY', options)
.then(response => response.json())
.then(response => console.log(response))
.catch(err => console.error(err));
Response Example
{
"jsonrpc": "2.0",
"id": 1,
"result": "0x1"
}