setTransactionMessageHeapSize

function setTransactionMessageHeapSize<TTransactionMessage>(
    heapSize,
    transactionMessage,
): TTransactionMessage;

Sets the heap frame size for a transaction message.

This function works with all transaction versions:

V1: Sets the heapSize field in the transaction message's config.
Legacy / V0: Appends (or replaces) a RequestHeapFrame instruction from the Compute Budget program.

Type Parameters

Type Parameter	Description
`TTransactionMessage` extends `TransactionMessage`	The transaction message type.

Parameter	Type	Description
`heapSize`	`number` \| `undefined`	The requested heap frame size in bytes, or `undefined` to remove the setting.
`transactionMessage`	`TTransactionMessage`	The transaction message to configure.

TTransactionMessage

A new transaction message with the heap size set.

const txMessage = setTransactionMessageHeapSize(
    256_000,
    transactionMessage,
);