Simulate transaction execution

POST

https://sei.nownodes.io/cosmos/tx/v1beta1/simulate

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Object containing post data.

Body

application/json

SimulateRequest is the request type for the Cosmos.Simulate RPC method.

tx_bytesstring

tx_bytes is the raw transaction.

Response

200OK

A successful response.

400Bad Request

Invalid request.

default

An unexpected error response.

Simulate transaction execution

curl -X POST 'https://sei.nownodes.io/cosmos/tx/v1beta1/simulate' \
  -H 'Content-Type: application/json' \
  -d '{
    "tx_bytes": "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"
  }'

const response = await fetch('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "tx_bytes": "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"
    }),
});

const data = await response.json();

require 'net/http'
require 'json'

uri = URI('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "tx_bytes": "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"
  }'

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

import requests

payload = {
  "tx_bytes": "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"
}

response = requests.post('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate', json=payload)
data = response.json()

const response = await fetch('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "tx_bytes": "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"
    }),
});

const data = await response.json();

const endpoint = "https://sei.nownodes.io/cosmos/tx/v1beta1/simulate";
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({
    "tx_bytes": "CtwCCtkCCjkvc2VpcHJvdG9jb2wuc2VpY2hhaW4ub3JhY2xlLk1zZ0FnZ3JlZ2F0ZUV4Y2hhbmdlUmF0ZVZvdGUSmwISuQExLjY5ODI4MzIzMDM2MTg4NDg5M3VhdG9tLDgzNTIyLjQ2MjM2MjM5NTU4ODkzNTkxOHVidGMsMjY0OS4zNzE2OTQzOTMyMzk2OTkyMjR1ZXRoLDAuMDM1NTc2NDM1MDkzNzA2NDgzdW9zbW8sMC4wNTgxMzkzMjA4NTY1OTExMDN1c2VpLDEuMDAwMTgzNTM2ODE3NzgxMTYwdXVzZGMsMC45OTk3MTE1NDc0NzQwMTcxNDl1dXNkdBoqc2VpMWFjcTVyamVxMzIwdXZxd2d6bHNhZ3IydXJ2dnVmendlbmtxcHZuIjFzZWl2YWxvcGVyMW1tNXA2YWsydzk0Y3dyeTBuNDJweDNzc2FqZ3l0eG53ZnZkNHc4EmIKUwpGCh8vY29zbW9zLmNyeXB0by5zZWNwMjU2azEuUHViS2V5EiMKIQLmKr80MEnkeXJ9pjmpZQtLAX9HdB6gkWi6mcbMv3uRhRIECgIIARiZ5L8vEgsKCQoEdXNlaRIBMBpAwCaBFZUaFXjDHAB2E5o8NR5bR9F4rA7L9jGja15r/X4k0Y/vQP8lKYeTYDmz0+9Gm8+E67VrIKBcC9lMlyoNnA=="
  });
console.log(result);

const response = await fetch('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "tx_bytes": "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"
    }),
});

const data = await response.json();

import requests

payload = {
  "tx_bytes": "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"
}

response = requests.post('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://sei.nownodes.io/cosmos/tx/v1beta1/simulate')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "tx_bytes": "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"
  }'

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

Request Body

{
  "tx_bytes": "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"
}

{
  "gas_info": {
    "gas_wanted": "string",
    "gas_used": "string"
  },
  "result": {
    "data": "string",
    "log": "string",
    "events": [
      {
        "type": "string",
        "attributes": [
          {
            "key": "string",
            "value": "string",
            "index": true
          }
        ]
      }
    ],
    "msg_responses": [
      {
        "@type": "string"
      }
    ]
  }
}

{
  "code": 3,
  "message": "Invalid request.",
  "details": []
}

{
  "error": "string",
  "code": 0,
  "message": "string",
  "details": [
    {
      "@type": "string"
    }
  ]
}