0.8.0

• BREAKING Hydra keys now use the text envelope format.

  • hydra-tools executable now produces keys in the same format as cardano keys so this should make key handling simpler.
  • Take a look at the example on how to use hydra-tools to generate necessary hydra keys.

• BREAKING hydra-node command line flag --node-id is now mandatory.

  • Instead of Host we are using the node-id in the server messages like + PeerConnected/Disconnected which are also used in
  • the TUI to distinguish between different connected peers.
  • This also changes the way how NodeIds are represented on the API.

• BREAKING Keep track of contestationDeadline instead of remainingContestationPeriod and fix ReadyToFanout. #483

  • Clients can now rely on ReadyToFanout, such that sending a Fanout input after seeing this output will never be "too early".
  • The HeadIsClosed server output now contains the deadline instead of the remaining time.
  • See hydra-tui for an example how to use the contestationDeadline and ReadyToFanout.
  • See ADR20 for details and the rationale.

• BREAKING Several changes to the API:

  • The InitialSnapshot only contains the initialUTxO as the rest of the information was useless. #533
  • Renamed CannotSpendInput -> InternalWalletError and CannotCoverFees -> NotEnoughFuel. #582

• BREAKING Changed logs to improve legibility and trace on-chain posting errors. #472

  • Strip chain layer logs to only contain TxId instead of full transactions in the nominal cases.
  • Renamed log entry prefixes Processing -> Begin and Processed -> End.
  • Added PostingFailed log entry.

• BREAKING The hydra-cluster executable (our smoke test) does require --publish-scripts or --hydra-scripts-tx-id now as it may be provided with pre-published hydra scripts.

• The hydra-node does persist L1 and L2 states on disk now: #187

  • New --persistence-dir command line argument to configure location.
  • Writes two JSON files headstate and chainstate to the persistence directory.
  • While introspectable, modification of these files is not recommended.

• Fixed bugs in hydra-node:

  • Crash after 3k blocks because of a failed time conversion. #523
  • Internal wallet was losing memory of spent fuel UTxOs in presence of transaction failures. #525
  • Node does not see some UTxOs sent to the internal wallet on startup. #526
  • Prevent transactions from being resubmitted for application over and over. #485

• Prevent misconfiguration of hydra-node by logging the command line options used and error out when:

  • provided number of Hydra parties exceeds a known working maximum (currently 4)
  • number of provided Cardano and Hydra keys is not the same

• Added a hydra-tools executable, to help with generating Hydra keys and get hold of the marker datum hash. #474

• Compute transaction costs as a "min fee" and report it in the tx-cost benchmark.

• Update hydra-node-options section in docs.

• Publish test results on website. #547

• Improved hydra-tui user experience:

  • Fixed too fast clearing of errors and other feedback #506
  • Introduced a pending state to avoid resubmission of transactions #526
  • Can show full history (scrollable) #577

• Build & publish static Linux x86_64 executables on each release 👇 #546

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Built artifacts

• 📦 Static x86_64-linux binaries: here (also attached)
• 🐳 Docker image: here

Hydra Scripts

Transaction IDs to be used as --hydra-scripts-tx-id when running hydra-node on the following networks:

• preview: 4081fab39728fa3c05c0edc4dc7c0e8c45129ca6b2b70bf8600c1203a79d2c6d
  published & checked during smoke test run #32 (failing because no PlutusV2 cost model was on the testnet at that time)