Add auxiliary PoW to a Monero block template for merge mining

POST

https://xmr.nownodes.io/json_rpc

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Enables merge mining without manually altering the coinbase transaction. Accepts auxiliary block information and returns a modified block template with the auxiliary PoW included.

Body

application/json

jsonrpcstring

idstring

methodstring

paramsobject

Show child attributes

blocktemplate_blobstring

Hexadecimal representation of the block template

aux_powArray<object>

List of auxiliary block hashes and IDs

Show child attributes

idstring

hashstring

Response

200OK

Auxiliary PoW added successfully

400Bad Request

Bad Request – invalid parameters

403Forbidden

Forbidden – insufficient permissions

404Not Found

Not Found – block template not found

500Internal Server Error

Internal server error

Add auxiliary PoW to a Monero block template for merge mining

curl -X POST 'https://xmr.nownodes.io/json_rpc' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": "0",
    "method": "add_aux_pow",
    "params": {
      "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
      "aux_pow": [
        {
          "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
          "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
        }
      ]
    }
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://xmr.nownodes.io/json_rpc");
const result = await provider.send("add_aux_pow", {
  "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
  "aux_pow": [
    {
      "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
      "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
    }
  ]
});
console.log(result);

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

uri = URI('https://xmr.nownodes.io/json_rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "add_aux_pow",
  "params": {
    "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
    "aux_pow": [
      {
        "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
        "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
      }
    ]
  },
  "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://xmr.nownodes.io/json_rpc"))
response = w3.provider.make_request("add_aux_pow", {
  "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
  "aux_pow": [
    {
      "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
      "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
    }
  ]
})
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "add_aux_pow",
  params: {
  "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
  "aux_pow": [
    {
      "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
      "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
    }
  ]
},
});

console.log(result);

const endpoint = "https://xmr.nownodes.io/json_rpc";
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: "add_aux_pow", params: {
  "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
  "aux_pow": [
    {
      "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
      "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
    }
  ]
}, id: 1 });
console.log(result);

const response = await fetch('https://xmr.nownodes.io/json_rpc', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": "0",
      "method": "add_aux_pow",
      "params": {
        "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
        "aux_pow": [
          {
            "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
            "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
          }
        ]
      }
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": "0",
  "method": "add_aux_pow",
  "params": {
    "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
    "aux_pow": [
      {
        "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
        "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
      }
    ]
  }
}

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

require 'net/http'
require 'json'

uri = URI('https://xmr.nownodes.io/json_rpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": "0",
    "method": "add_aux_pow",
    "params": {
      "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
      "aux_pow": [
        {
          "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
          "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
        }
      ]
    }
  }'

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",
  "id": "0",
  "method": "add_aux_pow",
  "params": {
    "blocktemplate_blob": "1010ee97e2a106e9f8ebe888...",
    "aux_pow": [
      {
        "id": "3200b4ea97c3b2081cd4190b58e49572b2319fed00d030ad51809dff06b5d8c8",
        "hash": "7b35762de164b20885e15dbe656b1138db06bb402fa1796f5765a23933d8859a"
      }
    ]
  }
}

{
  "id": "string",
  "jsonrpc": "string",
  "result": {
    "blocktemplate_blob": "string",
    "blockhashing_blob": "string",
    "merkle_root": "string",
    "merkle_tree_depth": 0,
    "aux_pow": [
      {
        "id": "string",
        "hash": "string"
      }
    ],
    "status": "OK",
    "untrusted": false
  }
}

{
  "error": "Invalid params"
}

"Forbidden"

{
  "error": "Block template not found"
}

{
  "error": "Internal server error"
}

Documentation

How to migrate to NOWNodes

Add auxiliary PoW to a Monero block template for merge mining

Authorizations

Body

Response