eth_signTransaction

POST

https://trx.nownodes.io/jsonrpc

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Signs a transaction locally with the private key of the specified account.

Body

application/json

Request value.

jsonrpcstringrequired

JSON-RPC protocol version.

methodstringeth_signTransactionrequired

JSON-RPC method name.

paramsArray<object>required

Array with a single object representing the transaction to sign.

Show child attributes

fromstringrequired

The address of the account that will sign the transaction.

tostring

The destination address of the transaction.

gasstring

Gas limit for the transaction, as a hex string.

gasPricestring

Gas price in wei, as a hex string.

valuestring

Amount of wei to send, as a hex string.

datastring

Data payload of the transaction, hex encoded.

noncestring

Nonce of the transaction, as a hex string.

chainIdinteger

The chain ID to protect against replay attacks.

idintegerrequired

Client request identifier echoed by the server.

Response

200OK

HTTP 200 response for eth_signTransaction. The body contains either a successful result or a node-level error.

400Bad Request

Bad Request. The request is malformed or contains invalid parameters.

401Unauthorized

Unauthorized: API key is present but rejected by the NOWNodes gateway.

405Method Not Allowed

Method Not Allowed. Returned by the NOWNodes gateway for malformed or unsupported gateway-level requests.

422Unprocessable Entity

Missing API key. The NOWNodes gateway returns plain text for this error.

500Internal Server Error

Internal Server Error. The gateway or node failed while processing the request.

eth_signTransaction

curl -X POST 'https://trx.nownodes.io/jsonrpc' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_signTransaction",
    "params": [
      {
        "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
        "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
        "gas": "0x5208",
        "gasPrice": "0x4a817c800",
        "value": "0xde0b6b3a7640000",
        "data": "0x",
        "nonce": "0x1",
        "chainId": 1
      }
    ],
    "id": 1
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://trx.nownodes.io/jsonrpc");
const result = await provider.send("eth_signTransaction", [
  {
    "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
    "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
    "gas": "0x5208",
    "gasPrice": "0x4a817c800",
    "value": "0xde0b6b3a7640000",
    "data": "0x",
    "nonce": "0x1",
    "chainId": 1
  }
]);
console.log(result);

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

uri = URI('https://trx.nownodes.io/jsonrpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_signTransaction",
  "params": [
    {
      "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
      "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
      "gas": "0x5208",
      "gasPrice": "0x4a817c800",
      "value": "0xde0b6b3a7640000",
      "data": "0x",
      "nonce": "0x1",
      "chainId": 1
    }
  ],
  "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://trx.nownodes.io/jsonrpc"))
response = w3.provider.make_request("eth_signTransaction", [
  {
    "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
    "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
    "gas": "0x5208",
    "gasPrice": "0x4a817c800",
    "value": "0xde0b6b3a7640000",
    "data": "0x",
    "nonce": "0x1",
    "chainId": 1
  }
])
print(response)

import { createPublicClient, http } from "viem";

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

const result = await client.request({
  method: "eth_signTransaction",
  params: [
  {
    "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
    "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
    "gas": "0x5208",
    "gasPrice": "0x4a817c800",
    "value": "0xde0b6b3a7640000",
    "data": "0x",
    "nonce": "0x1",
    "chainId": 1
  }
],
});

console.log(result);

const endpoint = "https://trx.nownodes.io/jsonrpc";
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_signTransaction", params: [
  {
    "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
    "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
    "gas": "0x5208",
    "gasPrice": "0x4a817c800",
    "value": "0xde0b6b3a7640000",
    "data": "0x",
    "nonce": "0x1",
    "chainId": 1
  }
], id: 1 });
console.log(result);

const response = await fetch('https://trx.nownodes.io/jsonrpc', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_signTransaction",
      "params": [
        {
          "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
          "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
          "gas": "0x5208",
          "gasPrice": "0x4a817c800",
          "value": "0xde0b6b3a7640000",
          "data": "0x",
          "nonce": "0x1",
          "chainId": 1
        }
      ],
      "id": 1
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_signTransaction",
  "params": [
    {
      "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
      "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
      "gas": "0x5208",
      "gasPrice": "0x4a817c800",
      "value": "0xde0b6b3a7640000",
      "data": "0x",
      "nonce": "0x1",
      "chainId": 1
    }
  ],
  "id": 1
}

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

require 'net/http'
require 'json'

uri = URI('https://trx.nownodes.io/jsonrpc')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "eth_signTransaction",
    "params": [
      {
        "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
        "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
        "gas": "0x5208",
        "gasPrice": "0x4a817c800",
        "value": "0xde0b6b3a7640000",
        "data": "0x",
        "nonce": "0x1",
        "chainId": 1
      }
    ],
    "id": 1
  }'

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": "eth_signTransaction",
  "params": [
    {
      "from": "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
      "to": "0x85a3d76e3a6a4b16b5b442c1b11a03bdcc0a9f30",
      "gas": "0x5208",
      "gasPrice": "0x4a817c800",
      "value": "0xde0b6b3a7640000",
      "data": "0x",
      "nonce": "0x1",
      "chainId": 1
    }
  ],
  "id": 1
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "blockHash": "0x000000000502e9686b96165061a0c1deaa8818cb4c2950a60d0d713865b106d3",
    "blockNumber": "0x502e969",
    "from": "0x5aeda56215b167893e80b4fe645ba6d5bab767de",
    "gas": "0x5208",
    "gasPrice": "0x0",
    "hash": "0xaaeb5bfd0d5f5a4ba8c825bdc8bc6f6ceaec896f11f31c1374d9285dc0c12906",
    "input": "0x",
    "nonce": "0x0",
    "to": "0x5aeda56215b167893e80b4fe645ba6d5bab767de",
    "transactionIndex": "0x0",
    "value": "0x0",
    "type": "0x0",
    "v": "0x0",
    "r": "0x1",
    "s": "0x1"
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32602,
    "message": "invalid argument 0: invalid parameter for eth_signTransaction"
  }
}

{
  "code": 400,
  "message": "Bad Request"
}

Unknown API_key

Method Not Allowed

Missing API_key

{
  "code": 500,
  "message": "Internal Server Error"
}

Documentation

How to migrate to NOWNodes

eth_signTransaction

Authorizations

Body

Response