Transaction Service

Compile, sign, simulate, and submit Solana transactions through the full lifecycle.

The Transaction Service manages the complete Solana transaction lifecycle — from draft construction through compilation, signing, and on-chain submission. Every transaction progresses through a defined set of states: DRAFT → COMPILED → PARTIALLY_SIGNED → FULLY_SIGNED → submitted. See the Transaction Lifecycle concept page for a full walkthrough with state machine diagram.

Methods

Method	Description	State Transition
CompileTransaction	Serialize a draft transaction to wire format, fetching the latest blockhash.	DRAFT → COMPILED
EstimateTransaction	Estimate compute units and fee lamports for a compiled transaction.	None (read-only)
SimulateTransaction	Dry-run a transaction against current ledger state without committing it.	None (read-only)
SignTransaction	Add one or more cryptographic signatures to a compiled transaction.	COMPILED → PARTIALLY_SIGNED → FULLY_SIGNED
CheckIfTransactionIsExpired	Check whether a compiled transaction’s blockhash has expired (~150 slots).	None (read-only)
SubmitTransaction	Broadcast a fully signed transaction to the Solana network.	FULLY_SIGNED → submitted
GetTransaction	Look up an on-chain transaction by signature.	None (read-only)
MonitorTransaction	Stream real-time status updates for a submitted transaction.	Streaming RPC