Horizon 1.8.2

• Fixed a bug which prevented Horizon from accepting TLS connections.

Horizon 1.8.1

• Fixed a bug in code ingesting fee bump transactions.

Horizon 1.8.0

Changes

• Added new and changed existing metrics:
  • horizon_build_info - contains build information in labels (version - Horizon version, goversion - Go runtime version),
  • horizon_ingest_enable - equals 1 if ingestion system is running, 0 otherwise,
  • horizon_ingest_state_invalid - equals 1 if state is invalid, 0 otherwise,
  • horizon_db_max_open_connections - determines the maximum possible opened DB connections,
  • horizon_db_wait_duration_seconds_total - changed the values to be in seconds instead of nanoseconds.
• Fixed a data race when shutting down the HTTP server. (#2958).
• Fixed emitting incorrect errors related to OrderBook Stream when shutting down the app. (#2964)

Experimental

The previous implementation of Captive Stellar-Core streams meta stream using a filesystem pipe. This implies that both Horizon and Stellar-Core had to be deployed to the same server. One of the disadvantages of such requirement is a need for detailed per-process monitoring to be able to connect potential issues (like memory leaks) to the specific service.

To solve this it's now possible to start a captivecore on another machine and configure Horizon to use it in ingestion. This requires two config options set:

• ENABLE_CAPTIVE_CORE_INGESTION=true,
• REMOTE_CAPTIVE_CORE_URL - pointing to captivecore server.

Horizon 1.7.1

This patch release fixes a regression introduced in 1.7.0, breaking the /offers endpoint. Thus, we recommend upgrading as soon as possible.

Changes

• Fix path parameter mismatch in /offers endpoint #2927.

Horizon 1.7.0

DB schema migration (expected migration time: < 10 mins)

• Add new multicolumn index to improve the /trades's endpoint performance #2869.
• Add constraints on database columns which cannot hold negative values #2827.

Changes

• Update Go toolchain to 1.14.6 in order to fix golang/go#34775, which caused some database queries to be executed instead of rolled back.
• Fix panic on missing command line arguments #2872
• Fix race condition where submitting a transaction to Horizon can result in a bad sequence error even though Stellar Core accepted the transaction. #2877
• Add new DB metrics (#2844):
  • db_in_use_connections - number of opened DB connections in use (not idle),
  • db_wait_count - number of connections waited for,
  • db_wait_duration - total time blocked waiting for a new connection.

Horizon 1.6.0

• Add --parallel-workers and --parallel-job-size to horizon db reingest range. --parallel-workers will parallelize reingestion using the supplied number of workers. (#2724)
• Remove Stellar Core's database dependency for non-ingesting instances of Horizon. (#2759)
  Horizon doesn't require access to a Stellar Core database if it is only serving HTTP request, this allows the separation of front-end and ingesting instances.
  The following config parameters were removed:
  • core-db-max-open-connections
  • core-db-max-idle-connections
• HAL response population is implemented using Go strings package instead of regexp, improving its performance. (#2806)
• Fix a bug in POST /transactions that could cause tx_bad_seq errors instead of processing a valid transaction. (#2805)
• The --connection-timeout param is ignored in POST /transactions. The requests sent to that endpoint will always timeout after 30 seconds. (#2818)

Experimental

• Add experimental support for live ingestion using a Stellar Core subprocess instead of a persistent Stellar Core database.

  Stellar-core now contains an experimental feature which allows replaying ledger's metadata in-memory. This feature starts paving the way to remove the dependency between Stellar Core's database and Horizon. Requires Stellar Core v13.2.0.

  To try out this new experimental feature, you need to specify the following parameters when starting ingesting Horizon instance:

  • --enable-captive-core-ingestion or ENABLE_CAPTIVE_CORE_INGESTION=true.
  • --stellar-core-binary-path or STELLAR_CORE_BINARY_PATH.

Horizon 1.5.0

Changes

• Remove --ingest-failed-transactions flag. From now on Horizon will always ingest failed transactions. WARNING: If your application is using Horizon DB directly (not recommended!) remember that now it will also contain failed txs. (#2702).
• Add transaction set operation count to history_ledger(#2690).
  Extend ingestion to store the total number of operations in the transaction set and expose it in the ledger resource via tx_set_operation_count. This feature allows you to assess the used capacity of a transaction set.
• Fix /metrics end-point (#2717).
• Gracefully handle incorrect assets in the query parameters of GET /offers (#2634).
• Fix logging message in OrderBookStream (#2699).
• Fix data race in root endpoint (#2745).

Experimental

• Add experimental support for database reingestion using a Stellar Core subprocess instead of a persistent Stellar Core database (#2695).

  Stellar Core v12.3.0 added an experimental feature which allows replaying ledger's metadata in-memory. This feature speeds up reingestion and starts paving the way to remove the dependency between Stellar Core's database and Horizon.

  For now, this is only supported while running horizon db reingest. To try out this new experimental feature, you need to specify the following parameters:

  • --enable-captive-core-ingestion or ENABLE_CAPTIVE_CORE_INGESTION=true.
  • --stellar-core-binary-path or STELLAR_CORE_BINARY_PATH.

SDK Maintainers: action needed

• Add the new field tx_set_operation_count to the ledger resource (#2690). This field can be a number or null.

horizonclient v3.2.0 & txnbuild v3.2.0

• txnbuild now generates V1 transaction envelopes which are only supported by Protocol 13 (#2640)
• Add ToXDR() functions for Transaction and FeeBumpTransaction instances which return xdr transaction envelopes without errors (#2651)

Horizon 1.4.0

• Drop support for MuxedAccounts strkeys (spec'ed in SEP23).
  SEP23 is still a draft and we don't want to encourage storing strkeys which may not be definite.
• Replace SequenceProvider implementation with one which queries the Horizon DB for sequence numbers instead of the Stellar Core DB.
• Use the Horizon DB instead of Horizon's in memory order book graph to query orderbook details for the /order_book endpoint.
• Remove JSON variant of GET /metrics, both in the server and client code. It's using Prometheus format by default now.
• Decreased memory usage of initial state ingestion stage and state verifier (#2618).
• Remove --exp-ingest-in-memory-only Horizon flag. The in memory order book graph which powers the path finding endpoints is now updated using the Horizon DB instead of directly via ingestion (#2630).

horizonclient v3.1.0 & txnbuild v3.1.0

• Fix bug which occurs when parsing xdr offers with prices that require more than 7 decimals of precision (#2588)
• Add AddSignatureBase64 function to both Transaction and FeeBumpTransaction objects for adding a base64-encoded signature. #2586