Sign arbitrary data

deprecated

POST

https://vinu.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Signs arbitrary data with a key held in the node's keystore, using the \x19Ethereum Signed Message prefix.

Not usable on this endpoint.

eth_sign signs with a key from the node's keystore. Our nodes hold no keys - eth_accounts returns [] - so every call fails with -32000 unknown account. Sign the transaction on your side and broadcast it with eth_sendRawTransaction.

Body

application/json

jsonrpcstringrequired

methodstringrequired

paramsArray<string>required

[address, data]

address: The account that will sign the data
data: The data to be signed (must be a hex string)

idintegerrequired

Response

200OK

Not reachable on this endpoint: the call always fails with -32000 unknown account

405Method Not Allowed

Method not served by this endpoint. The body is the plain-text string Method Not Allowed, not JSON.

422Unprocessable Entity

Missing API key - the api-key header was absent. The body is the plain-text string Missing API_key, not JSON.

Sign arbitrary data

curl -X POST 'https://vinu.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -H 'api-key: YOUR_API_KEY' \
  -d '{"jsonrpc": "2.0", "method": "eth_sign", "params": ["0x1b409ffc459802fbaa4a3797e86beb9a001b318e", "0xdeadbeef"], "id": 1}'

import { FetchRequest, JsonRpcProvider } from "ethers";

const request = new FetchRequest("https://vinu.nownodes.io/");
request.setHeader("api-key", "YOUR_API_KEY");

const provider = new JsonRpcProvider(request);
const result = await provider.send("eth_sign", ["0x1b409ffc459802fbaa4a3797e86beb9a001b318e", "0xdeadbeef"]);
console.log(result);

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

uri = URI('https://vinu.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request['api-key'] = 'YOUR_API_KEY'
request.body = '{"jsonrpc": "2.0", "method": "eth_sign", "params": ["0x1b409ffc459802fbaa4a3797e86beb9a001b318e", "0xdeadbeef"], "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://vinu.nownodes.io/",
    request_kwargs={"headers": {"api-key": "YOUR_API_KEY"}},
))

response = w3.provider.make_request("eth_sign", [
    "0x1b409ffc459802fbaa4a3797e86beb9a001b318e",
    "0xdeadbeef",
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://vinu.nownodes.io/", {
    fetchOptions: { headers: { "api-key": "YOUR_API_KEY" } },
  }),
});

const result = await client.request({
  method: "eth_sign",
  params: ["0x1b409ffc459802fbaa4a3797e86beb9a001b318e", "0xdeadbeef"],
});

console.log(result);

const endpoint = "https://vinu.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: "eth_sign", params: [
  "0x1b409ffc459802fbaa4a3797e86beb9a001b318e",
  "0xdeadbeef"
], id: 1 });
console.log(result);

const response = await fetch('https://vinu.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'api-key': 'YOUR_API_KEY',
  },
  body: JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_sign",
    "params": [
      "0x1b409ffc459802fbaa4a3797e86beb9a001b318e",
      "0xdeadbeef"
    ],
    "id": 1
  }),
});

const data = await response.json();

import requests

payload = {
    "jsonrpc": "2.0",
    "method": "eth_sign",
    "params": [
        "0x1b409ffc459802fbaa4a3797e86beb9a001b318e",
        "0xdeadbeef",
    ],
    "id": 1,
}

response = requests.post(
    "https://vinu.nownodes.io/",
    json=payload,
    headers={"api-key": "YOUR_API_KEY"},
)

print(response.json())

require 'net/http'
require 'json'

uri = URI('https://vinu.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request['api-key'] = 'YOUR_API_KEY'
request.body = '{"jsonrpc": "2.0", "method": "eth_sign", "params": ["0x1b409ffc459802fbaa4a3797e86beb9a001b318e", "0xdeadbeef"], "id": 1}'

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

puts JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "method": "eth_sign",
  "params": [
    "0x1b409ffc459802fbaa4a3797e86beb9a001b318e",
    "0xdeadbeef"
  ],
  "id": 1
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x2c6401ff89...3b4998b061"
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "invalid argument"
  }
}

Method Not Allowed

Missing API_key