signrawtransactionwithkey

POST

https://bch.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Changed. Since 29.2.0 the node signs with Schnorr signatures by default (-signschnorr=1). Inputs in the returned hex carry 65-byte Schnorr signatures (64 bytes plus the sighash byte) instead of DER-encoded ECDSA signatures, so the signed transaction is shorter and its exact bytes differ from earlier versions. For a multisig input, all cosigners must use the same scheme: mixing Schnorr and ECDSA signatures in one input is forbidden by consensus.

Signs inputs for a raw transaction using explicitly provided private keys, without needing access to a local wallet. Useful for offline signing or stateless transaction construction.

Body

application/json

jsonrpcstringrequired

idstringrequired

methodstringsignrawtransactionwithkeyrequired

paramsArray<string | Array<string> | Array<object>>required

Parameters:

hexstring (string, required): The raw transaction hex string.
privkeys (array of strings, required): Array of WIF private keys.
prevtxs (array, optional): Array of previous output details for inputs to sign.

Show child attributes

One of

string

Array<string>

Array<object>

Show child attributes

txidstring

Transaction ID of the UTXO being spent.

voutinteger

Output index.

scriptPubKeystring

Script of the UTXO.

redeemScriptstring

(optional) Redeem script for P2SH inputs.

witnessScriptstring

(optional) Witness script for P2WSH inputs.

amountnumber

Amount in BTC of the UTXO.

Response

200OK

Transaction signed successfully

401Unauthorized

Unauthorized

500Internal Server Error

Internal Server Error

signrawtransactionwithkey

curl -X POST 'https://bch.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "signrawtransactionwithkey",
    "params": [
      "0200000001abcd...00000000",
      [
        "cV...yourWIFkey..."
      ],
      [
        {
          "txid": "abcd1234...",
          "vout": 0,
          "scriptPubKey": "76a914...88ac",
          "redeemScript": "0020...",
          "amount": 0.001
        }
      ]
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://bch.nownodes.io/");
const result = await provider.send("signrawtransactionwithkey", [
  "0200000001abcd...00000000",
  [
    "cV...yourWIFkey..."
  ],
  [
    {
      "txid": "abcd1234...",
      "vout": 0,
      "scriptPubKey": "76a914...88ac",
      "redeemScript": "0020...",
      "amount": 0.001
    }
  ]
]);
console.log(result);

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

uri = URI('https://bch.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "signrawtransactionwithkey",
  "params": [
    "0200000001abcd...00000000",
    [
      "cV...yourWIFkey..."
    ],
    [
      {
        "txid": "abcd1234...",
        "vout": 0,
        "scriptPubKey": "76a914...88ac",
        "redeemScript": "0020...",
        "amount": 0.001
      }
    ]
  ],
  "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://bch.nownodes.io/"))
response = w3.provider.make_request("signrawtransactionwithkey", [
  "0200000001abcd...00000000",
  [
    "cV...yourWIFkey..."
  ],
  [
    {
      "txid": "abcd1234...",
      "vout": 0,
      "scriptPubKey": "76a914...88ac",
      "redeemScript": "0020...",
      "amount": 0.001
    }
  ]
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "signrawtransactionwithkey",
  params: [
  "0200000001abcd...00000000",
  [
    "cV...yourWIFkey..."
  ],
  [
    {
      "txid": "abcd1234...",
      "vout": 0,
      "scriptPubKey": "76a914...88ac",
      "redeemScript": "0020...",
      "amount": 0.001
    }
  ]
],
});

console.log(result);

const endpoint = "https://bch.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: "signrawtransactionwithkey", params: [
  "0200000001abcd...00000000",
  [
    "cV...yourWIFkey..."
  ],
  [
    {
      "txid": "abcd1234...",
      "vout": 0,
      "scriptPubKey": "76a914...88ac",
      "redeemScript": "0020...",
      "amount": 0.001
    }
  ]
], id: 1 });
console.log(result);

const response = await fetch('https://bch.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "1.0",
      "id": "curltest",
      "method": "signrawtransactionwithkey",
      "params": [
        "0200000001abcd...00000000",
        [
          "cV...yourWIFkey..."
        ],
        [
          {
            "txid": "abcd1234...",
            "vout": 0,
            "scriptPubKey": "76a914...88ac",
            "redeemScript": "0020...",
            "amount": 0.001
          }
        ]
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "1.0",
  "id": "curltest",
  "method": "signrawtransactionwithkey",
  "params": [
    "0200000001abcd...00000000",
    [
      "cV...yourWIFkey..."
    ],
    [
      {
        "txid": "abcd1234...",
        "vout": 0,
        "scriptPubKey": "76a914...88ac",
        "redeemScript": "0020...",
        "amount": 0.001
      }
    ]
  ]
}

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

require 'net/http'
require 'json'

uri = URI('https://bch.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "signrawtransactionwithkey",
    "params": [
      "0200000001abcd...00000000",
      [
        "cV...yourWIFkey..."
      ],
      [
        {
          "txid": "abcd1234...",
          "vout": 0,
          "scriptPubKey": "76a914...88ac",
          "redeemScript": "0020...",
          "amount": 0.001
        }
      ]
    ]
  }'

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

Request Body

{
  "jsonrpc": "1.0",
  "id": "curltest",
  "method": "signrawtransactionwithkey",
  "params": [
    "0200000001abcd...00000000",
    [
      "cV...yourWIFkey..."
    ],
    [
      {
        "txid": "abcd1234...",
        "vout": 0,
        "scriptPubKey": "76a914...88ac",
        "redeemScript": "0020...",
        "amount": 0.001
      }
    ]
  ]
}

{
  "result": {
    "hex": "0200000001abcd...00000000",
    "complete": true,
    "errors": []
  },
  "error": null,
  "id": "curltest"
}

"Unknown API_key"

"Service is unavailable"