Submit and watch extrinsic

POST

https://moonbeam.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Submit a fully-formed extrinsic and watch for its lifecycle events.

The author_submitAndWatchExtrinsic method submits a signed extrinsic to the transaction pool and returns a subscription ID that can be used to track the extrinsic's progress through various stages until it is finalized or fails.

This method provides real-time updates about the extrinsic's status including:

When it enters the transaction pool
When it is included in a block
Finalization status
Any errors that occur

Body

application/json

jsonrpcstring2.0required

JSON-RPC version identifier

methodstringauthor_submitAndWatchExtrinsicrequired

The method to be invoked

idinteger | stringrequired

Request identifier for matching responses

paramsArray<string>required

Array containing the hex-encoded extrinsic

Response

200OK

Extrinsic submitted successfully, subscription created

400Bad Request

Invalid extrinsic or request

500Internal Server Error

Internal server error

Submit and watch extrinsic

curl -X POST 'https://moonbeam.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "author_submitAndWatchExtrinsic",
    "id": 1,
    "params": [
      "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://moonbeam.nownodes.io/");
const result = await provider.send("author_submitAndWatchExtrinsic", [
  "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://moonbeam.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "author_submitAndWatchExtrinsic",
  "params": [
    "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://moonbeam.nownodes.io/"))
response = w3.provider.make_request("author_submitAndWatchExtrinsic", [
  "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://moonbeam.nownodes.io/"),
});

const result = await client.request({
  method: "author_submitAndWatchExtrinsic",
  params: [
  "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
],
});

console.log(result);

const endpoint = "https://moonbeam.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "author_submitAndWatchExtrinsic", params: [
  "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
], id: 1 });
console.log(result);

const response = await fetch('https://moonbeam.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "author_submitAndWatchExtrinsic",
      "id": 1,
      "params": [
        "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "author_submitAndWatchExtrinsic",
  "id": 1,
  "params": [
    "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
  ]
}

response = requests.post('https://moonbeam.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://moonbeam.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "author_submitAndWatchExtrinsic",
    "id": 1,
    "params": [
      "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
    ]
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "method": "author_submitAndWatchExtrinsic",
  "id": 1,
  "params": [
    "0x2d028400d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d00a0db2df800ff8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000000000000000000000000000000"
  ]
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x1234567890abcdef"
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params",
    "data": "Invalid extrinsic format"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32603,
    "message": "Internal error",
    "data": "Failed to submit extrinsic"
  }
}

Documentation

How to migrate to NOWNodes

Submit and watch extrinsic

Authorizations

Body

Response