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RELEASE_NOTES.md

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Release Notes

Changes in Transact 0.3.6

  • Update the cylinder dependency of libtransact and the simple_xo example to version 0.2

Changes in Transact 0.3.5

libtransact Updates

  • Add a 32bit-usize-friendly lmdb DEFAULT_SIZE value

Changes in Transact 0.3.4

libtransact Updates

  • Fix a serial scheduler execution task iterator test that was failing due to timing issues.

Changes in Transact 0.3.3

libtransact Updates

  • Update the executor's internal thread to shutdown the fan-out threads after its main loop has terminated to ensure they get shut down properly every time.
  • Fix a bug where the task readers in the executor were always being given an index of 0.
  • Add better management of task readers to the executor to enable shutting down the task readers when they have completed. Previously, these task readers were not being cleaned up, which leaked memory.
  • Fix a bug in the serial scheduler's shutdown process where the scheduler's core thread did not always send a message to terminate the execution task iterator.
  • Update the serial scheduler's execution task iterator to log an error whenever the scheduler's core thread shuts down without notifying the iterator.

Changes in Transact 0.3.2

libtransact Updates

  • Fix an issue in state::merkle::MerkleRadixTree where an empty set of state changes would produce an empty state id. This has been updated to return the current state root hash.
  • Fix two issues in the SerialScheduler with call ordering of cancel and finalize. These methods can be called in either order.

Changes in Transact 0.3.1

Highlights

  • Update the sawtooth-sdk version to 0.5. The sawtooth-sdk is used for the sawtooth-compat feature.

Changes in Transact 0.3.0

Highlights

  • The contract-archive feature has been stabilized. This feature guards the smart contract archive (scar) functionality.
  • The transact::signing module has been replaced by the cylinder library crate.

libtransact Updates

  • Update the sawtooth-sdk and sawtooth-xo dependencies to 0.4.
  • Add a clone_box method to ContextLifecycle that enables the trait to be clone-able.
  • Add the ExecutionTaskSubmitter for submitting tasks to the executor. This struct is thread-safe and allows a single executor to be used across threads.
  • Update the families::command::make_command_transaction function to take a signer for signing the transaction.
  • Refactor the XoTransactionWorkload and XoBatchWorkload to take optional workload seeds and signers.

Scheduler

  • Add the SchedulerFactory trait for creating generic schedulers, along with implementations for MultiScheduler and SerialScheduler.
  • Require implementations of the Scheduler trait to have the Send marker trait.
  • Change the Scheduler::cancel method to abort and return any in-progress batches.
  • Change the Scheduler::cancel method to send a None execution result if the scheduler is finished.
  • Update all schedulers to shut themselves down when they are finished and have no more batches to execute.
  • Fix a bug in the serial scheduler where a None execution result was not sent when the scheduler was finalized with a non-empty batch queue.

CI Changes

  • Enable nightly builds to catch any breaking changes in dependencies or upstream tools.

Changes in Transact 0.2.4

Experimental Changes

  • Add a field to the SqliteDatabaseBuilder to modify the "synchronous" setting via PRAGMA statement. This setting provides different guarantees of data safety for situations such as OS crash or power loss.
  • Make the transact::workload module publicly available with the experimental feature "workload".
  • Make the xo workload tools publicly available with the transact::families::xo module and the experimental feature "family-xo".
  • Make the CommandTransactionHandler and associated methods for the command transaction family publicly available with the transact::families::command module and the experimental feature "family-command".

Other Changes

  • Add a justfile to enable running just build, just lint, and just test

Changes in Transact 0.2.3

Experimental Changes

  • Allow configuring "Write-Ahead Logging" (WAL) journal mode for SQLite databases. This mode offers significant performance improvements over the standard atomic commit and rollback mode.

Other Changes

  • Add TryFrom implementations to convert TransactionResult enums and TransactionReceipt structs into StateChange structs.

Changes in Transact 0.2.2

Experimental Changes

  • Update the SmartContractArchive::from_scar_file constructor to take multiple search paths for .scar files.
  • Add a configurable prefix for table names in SQLite databases.
  • Enable reading state via the cursor when using the SQLite database writer.

Changes in Transact 0.2.1:

Highlights:

  • Enable loading a .scar file into a native SmartContractArchive with the experimental feature "contract-archive"

Changes in Transact 0.2.0:

Highlights:

  • Add experimental SQLite support for state storage
  • Add an executable example using the Addresser trait implementations to generate radix addresses for up to three natural keys
  • Add support for storing invalid transaction results as transaction receipts

Breaking Changes:

  • Update DatabaseReader trait such that its "get" method returns a result
  • Remove change_log from the Merkle state implementation's public API
  • Update transaction receipt builder to allow building transaction receipts for invalid transactions.
  • Capture invalid transaction results as transaction receipts

Experimental Changes:

  • Add all experimental features to the Rust docs
  • Add a SQLite-backed implementation of the Database trait behind the experimental feature "sqlite-db"
  • Add KeyValueTransactionContext implementation behind the experimental "contract-context-key-value" feature, which uses a key-value state representation
  • Update Addresser error messages to be more accurate
  • Add more robust validation and error handling within the Addresser trait implementations
  • Add experimental "key-value-state" feature

Other Changes:

  • Add conversion from TransactionBuilder into BatchBuilder for easier batch building
  • Support converting a BatchList to and from a native Vec<Batch>
  • Add "state-merkle" feature for conditional compilation of the Merkle state implementation
  • Fix bug that converted transaction receipt header signatures to hex twice