simulateTransaction RPC Method

Simulate sending a transaction

params

stringrequired

Transaction, as an encoded string.

The transaction must have a valid blockhash, but is not required to be signed.

objectoptional

Configuration object containing the following fields:

result

object

The result will contain:

$ curl https://api.devnet.solana.com -s -X \
>   POST -H "Content-Type: application/json" -d ' 
>   {
>     "jsonrpc": "2.0",
>     "id": 1,
>     "method": "simulateTransaction",
>     "params": [
>       "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAEEjNmKiZGiOtSZ+g0//wH5kEQo3+UzictY+KlLV8hjXcs44M/Xnr+1SlZsqS6cFMQc46yj9PIsxqkycxJmXT+veJjIvefX4nhY9rY+B5qreeqTHu4mG6Xtxr5udn4MN8PnBt324e51j94YQl285GzN2rYa/E2DuQ0n/r35KNihi/zamQ6EeyeeVDvPVgUO2W3Lgt9hT+CfyqHvIa11egFPCgEDAwIBAAkDZAAAAAAAAAA=",
>       {
>         "commitment": "confirmed",
>         "encoding": "base64",
>         "replaceRecentBlockhash": true
>       }
>     ]
>   }
> '

Response

{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "apiVersion": "2.3.3",
      "slot": 393226680
    },
    "value": {
      "accounts": null,
      "err": null,
      "innerInstructions": null,
      "loadedAccountsDataSize": 413,
      "logs": [
        "Program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb invoke [1]",
        "Program log: Instruction: Transfer",
        "Program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb consumed 1714 of 200000 compute units",
        "Program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb success"
      ],
      "replacementBlockhash": {
        "blockhash": "6oFLsE7kmgJx9PjR4R63VRNtpAVJ648gCTr3nq5Hihit",
        "lastValidBlockHeight": 381186895
      },
      "returnData": null,
      "unitsConsumed": 1714
    }
  },
  "id": 1
}

$ curl https://api.devnet.solana.com -s -X \
>   POST -H "Content-Type: application/json" -d ' 
>   {
>     "jsonrpc": "2.0",
>     "id": 1,
>     "method": "simulateTransaction",
>     "params": [
>       "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAEEjNmKiZGiOtSZ+g0//wH5kEQo3+UzictY+KlLV8hjXcs44M/Xnr+1SlZsqS6cFMQc46yj9PIsxqkycxJmXT+veJjIvefX4nhY9rY+B5qreeqTHu4mG6Xtxr5udn4MN8PnBt324e51j94YQl285GzN2rYa/E2DuQ0n/r35KNihi/zamQ6EeyeeVDvPVgUO2W3Lgt9hT+CfyqHvIa11egFPCgEDAwIBAAkDZAAAAAAAAAA=",
>       {
>         "commitment": "confirmed",
>         "encoding": "base64",
>         "replaceRecentBlockhash": true
>       }
>     ]
>   }
> '