ScheduleService

ScheduleService protobuf gRPC definition exposing the Hedera Schedule Service RPC methods for create, sign, delete, and getInfo operations.

Transactions and queries for the Schedule Service

The Schedule Service allows transactions to be submitted without all the required signatures and allows anyone to provide the required signatures independently after a transaction has already been created.

Execution:

Scheduled Transactions are executed once all required signatures are collected and witnessed. Every time new signature is provided, a check is performed on the “readiness” of the execution.

The Scheduled Transaction will be executed immediately after the transaction that triggered it and will be externalized in a separate Transaction Record.

Transaction Record:

The timestamp of the Scheduled Transaction will be equal to consensusTimestamp + 1 nano, where consensusTimestamp is the timestamp of the transaction that triggered the execution.

The Transaction ID of the Scheduled Transaction will have the scheduled property set to true and inherit the transactionValidStart and accountID from the ScheduleCreate transaction.

The scheduleRef property of the transaction record will be populated with the ScheduleID of the Scheduled Transaction.

Post execution:

Once a given Scheduled Transaction executes, it will be removed from the ledger and any upcoming operation referring the ScheduleID will resolve to INVALID_SCHEDULE_ID.

Expiry:

Scheduled Transactions have a global expiry time txExpiryTimeSecs (Currently set to 30 minutes). If txExpiryTimeSecs pass and the Scheduled Transaction haven’t yet executed, it will be removed from the ledger as if ScheduleDelete operation is executed.

ScheduleService

RPC	Request	Response	Comments
createSchedule	Transaction	TransactionResponse	Creates a new Schedule by submitting the transaction
signSchedule	Transaction	TransactionResponse	Signs a new Schedule by submitting the transaction
deleteSchedule	Transaction	TransactionResponse	Deletes a new Schedule by submitting the transaction
getScheduleInfo	Query	Response	Retrieves the metadata of a schedule entity