simulateTransaction RPC Method

Parameters

transaction

string

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

object

The configuration object with the following fields:

Returns

result

Null if the account doesn't exist otherwise RpcResponse JSON object with the following fields:

context

An object that contains metadata about the current state of the Solana network at the time the request was processed

apiVersion

The version number

slot

The current slot in the Solana cluster during which the transactions are processed and new blocks are added to the blockchain

err

Error code if the transaction failed or null if the transaction succeeds

logs

An array of log messages the transaction instructions output during execution, null if simulation failed before the transaction was able to execute (for example due to an invalid blockhash or signature verification failure)

accounts

An array of accounts with the same length as the accounts.addresses array in the request

null

If the account doesn't exist or if err is not null

object

otherwise, a JSON object containing:

lamports

The number of lamports assigned to this account as u64 (64-bit unsigned integer)

owner

The base-58 encoded Pubkey of the program this account has been assigned to

data

The data associated with the account, either as encoded binary data or JSON format {'program': 'state'}, depending on encoding parameter

executable

A boolean indicating if the account contains a program (and is strictly read-only)

rentEpoch

The epoch at which this account will next owe rent, as u64 (64-bit unsigned integer)

Request

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curl https://docs-demo.solana-mainnet.quiknode.pro/ \
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  -X POST \
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  -H "Content-Type: application/json" \
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  --data '{"method":"simulateTransaction","params":["ENTER_ENCODED_TRANSACTION_ID"],"id":1,"jsonrpc":"2.0"}'

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