@solana/kit

v5.5.0 (2026-01-27)

Minor Changes

• [@solana/errors, @solana/instruction-plans] #1253 b4f5897 Thanks @lorisleiva! - Add isX and assertIsX type guard helpers for instruction plans, transaction plans, and transaction plan results

• [@solana/errors] #1260 08c9062 Thanks @mcintyre94! - Mark the cause deprecated for SOLANA_ERROR__INSTRUCTION_PLANS__FAILED_TO_EXECUTE_TRANSACTION_PLAN error

• [@solana/errors, @solana/instruction-plans] #1254 ba3f186 Thanks @lorisleiva! - Add SuccessfulTransactionPlanResult type with isSuccessfulTransactionPlanResult and assertIsSuccessfulTransactionPlanResult type guards

• [@solana/errors, @solana/instruction-plans] #1236 1cc0a31 Thanks @mcintyre94! - Add getFirstFailedSingleTransactionPlanResult, which you can use to get the first failed transaction plan result from a transaction plan result, or throw if none failed

• [@solana/errors] #1230 6af7c15 Thanks @mcintyre94! - Add a function unwrapSimulationError, which will return the cause of an error if it is a simulation error. Otherwise it is returned unchanged.

• [@solana/instruction-plans] #1245 f731129 Thanks @mcintyre94! - Add flattenInstructionPlan and flattenTransactionPlan functions, that can be used to remove the sequential/parallel structure from these plans. Deprecate getAllSingleTransactionPlans which is superseded by flattenTransactionPlan.

• [@solana/instruction-plans] #1233 b174ed5 Thanks @lorisleiva! - Add everyInstructionPlan, everyTransactionPlan and everyTransactionPlanResult functions that can be used to ensure a given predicate holds for all nodes inside their respective plan structures.

• [@solana/instruction-plans] #1247 ea97d43 Thanks @mcintyre94! - Add a new function appendTransactionMessageInstructionPlan that can be used to add the instructions from an instruction plan to a transaction message

• [@solana/instruction-plans] #1243 60e8c45 Thanks @lorisleiva! - Add transformInstructionPlan, transformTransactionPlan and transformTransactionPlanResult helpers for bottom-up transformation of instruction plan trees.

• [@solana/instruction-plans] #1235 a47e441 Thanks @lorisleiva! - Add passthroughFailedTransactionPlanExecution helper function that wraps a transaction plan execution promise to return a TransactionPlanResult even on execution failure. This allows handling execution results in a unified way without try/catch.

• [@solana/instruction-plans] #1232 589d761 Thanks @mcintyre94! - Add findInstructionPlan, findTransactionPlan and findTransactionPlanResult functions that can be used to find the plan matching a given predicate

Patch Changes

• [@solana/instruction-plans] #1256 cccea6f Thanks @mcintyre94! - Fix a bug where a message packer that requires multiple iterations is not correctly added when forced to fit in a single transaction, even if it can fit

• [@solana/kit] #1234 7e0377b Thanks @mcintyre94! - Fix a race condition in sendAndConfirmDurableNonceTransactionFactory

• [@solana/react] #1210 56433e9 Thanks @rajgoesout! - Return immediately when passing empty array of transactions to useSignTransactions and useSignAndSendTransactions