simulateTransaction

Simulate sending a transaction

simulateTransaction

POSThttps://mainnet.helius-rpc.com/?api-key=<api-key>

Body

application/json

jsonrpcenum

The JSON-RPC protocol version.

Example: "2.0"

2.0

idstring

A unique identifier for the request.

Example: "1"

methodenum

The name of the RPC method to invoke.

Example: "simulateTransaction"

simulateTransaction

paramsarray of one of

Parameters for simulating a transaction.

Response

200400401500

Successfully simulated the transaction.

Body

application/jsonexample

jsonrpcenum

The JSON-RPC protocol version.

Example: "2.0"

2.0

idstring

Identifier matching the request.

Example: "1"

resultobject

Result of the simulated transaction.

Request

JavaScriptCurlPython

const response = await fetch('https://mainnet.helius-rpc.com/?api-key=<api-key>', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "simulateTransaction",
      "params": [
        "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAEDArczbMia1tLmq7zz4DinMNN0pJ1JtLdqIJPUw3YrGCzYAMHBsgN27lcgB6H2WQvFgyZuJYHa46puOQo9yQ8CVQbd9uHXZaGT2cvhRs7reawctIXtX1s3kTqM9YV+/wCp20C7Wj2aiuk5TReAXo+VTVg8QTHjs0UjNMMKCvpzZ+ABAgEBARU=",
        {
          "encoding": "base64"
        }
      ]
    }),
});
const data = await response.json();

Response

200400401500

{
  "jsonrpc": "2.0",
  "id": "1",
  "result": {
    "context": {
      "slot": 218
    },
    "value": {
      "err": null,
      "logs": [
        "Program 83astBRguLMdt2h5U1Tpdq5tjFoJ6noeGwaY3mDLVcri invoke [1]"
      ],
      "accounts": [
        {
          "lamports": 5000,
          "owner": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"
        }
      ],
      "returnData": {
        "programId": "83astBRguLMdt2h5U1Tpdq5tjFoJ6noeGwaY3mDLVcri",
        "data": [
          "Kg=="
        ],
        "computeUnitsConsumed": 2366
      }
    }
  }
}