# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html)
## [Unreleased]
## [1.10.0] - 2026-11-10
### Added
- Errors have a binary encoding: `Except` has `Serial`, `Serialize` and
`Binary` instances. It is one byte that says which error, followed by the
message of `UserError` and `StringError`, as UTF-8 with its length, or
by the transactions of `TxIndexConflict`. Until now a server answered an
error in JSON whatever the client had asked for, so a client that spoke
binary needed a JSON decoder for that one case.
- `apiCall` and `apiBatch` decode an error as the `Content-Type` of the
response says: binary from a server that sends binary errors, JSON from
an older one. A client built with this version works with both.
- `apiEvents` listens to the events of a server and calls a function with
each as it comes. `apiCall` could not: it waits for a whole response, and
that one has no end.
### Changed
- Breaking, version 1.10.0, on the wire: `RawResultList`, the answer of
`/transactions/raw`, `/block/{block}/transactions/raw` and
`/block/height/{height}/raw`, starts with the number of its values, like
every other list. It was the values alone, one after the other. A client
and a server have to be of the same side of this change for those three
endpoints.
- Breaking, version 1.10.0: the response of `GetEvents` is an
`EventStream`, events one after the other with no count, which is what
servers have always sent. It was declared as a `SerialList`, whose count
was never there.
- Breaking, version 1.10.0: `Except` has a `BehindFleet` constructor, for
the 503 of a server that is one of a fleet and does not have the block
that the fleet answers from. In JSON it is `"error": "behind-fleet"`, as
such servers already answered. Code that matches every constructor of
`Except` has to add it.
## [1.9.0] - 2026-11-10
### Changed
- Breaking, version 1.9.0: `HealthCheck` has a field `redis`, whether the
Redis cache of the store answers, `Nothing` for a store without one. Code
that builds a `HealthCheck` has to give it. In JSON it is
`"redis": {"ok": true}`, left out when there is no cache; in the binary
encoding it is one more byte at the end. Both may be missing when read,
so old output still decodes, and old clients read new output. It does not
count towards `isOK`: a store without its Redis answers from its own
database and is fit to serve.
- Breaking, version 1.9.0: `apiCall` and `apiBatch` run in plain `IO` and
return `Either Except` the response, instead of working in any monad with
`MonadIO` and `MonadError Except`. Where you wrote
`runExceptT (apiCall ctx cfg req)`, write `apiCall ctx cfg req`; in an
`ExceptT` of your own, wrap it with `ExceptT`. `apiBatch` stops at the
first error. The package no longer depends on mtl.
- Breaking, version 1.9.0: no dependency on Scotty. `capturePath` gives the
route pattern as `Text`, such as `/block/:block`, instead of a Scotty
`RoutePattern`. The `Parsable` instances of `DeriveType`, `BinfoBlockId`,
`BinfoTxId`, `BinfoFilter` and `BinfoDate` are replaced by the functions
`textToDeriveType`, `parseBinfoBlockId`, `parseBinfoTxId`,
`parseBinfoFilter` and `parseBinfoDate`, which give `Maybe` the value.
- Version 1.9.0: legacy addresses are called `legacy` in the `derive`
parameter, and `deriveTypeToText DeriveNormal` is `"legacy"`.
`textToDeriveType` still reads `normal`, the old name, so old URLs keep
working. Clients never send the default, legacy, so requests stay
readable by older servers.
- haskoin-store-data has its own repository,
[jprupp/haskoin-store-data](https://github.com/jprupp/haskoin-store-data),
and its own releases. Up to 1.8.1 it was released from the haskoin-store
repository together with haskoin-store, with the same version number; the
entries below that version describe both packages.
- GHC2024 edition, with `DuplicateRecordFields`, `NoFieldSelectors`,
`OverloadedRecordDot` and `OverloadedStrings` on for every module, and
explicit deriving strategies. The API is unchanged.
- `Haskoin.Store.WebCommon` has an explicit export list, with the same
exports as before.
- The package has a full description, PVP upper bounds on every dependency,
and no `Setup.hs`. It builds with the same warnings as haskoin-store.
### Added
- Tests checked by law for every type: binary encodings round-trip and agree
between Serial, cereal and binary; JSON round-trips and the fast encoders
write the same JSON as `toJSON`; the wire format of the basic types is
pinned. Types whose encoding depends on the network get a random network
for each case, so every network is covered without running each law once
per network. The suite runs in about 4 seconds instead of nearly four
minutes.
## [1.8.1] - 2026-11-07
### Changed
- Documentation: the README explains the purpose and design of the store, with
installation steps, a full configuration reference, monitoring and a
tutorial, and the Haddock of every module and function says why it works the
way it does.
- Build against nqe 0.6.9, rocksdb-haskell-jprupp 2.6.1, rocksdb-query 0.6.1,
statsd-rupp 0.5.0.2, secp256k1-haskell 2.0.1, haskoin-node 2.3.1 and
Stackage nightly-2026-11-07.
## [1.8.0] - 2026-11-07
### Changed
- Index the mempool by the time each transaction entered it. `/mempool`,
`/blockchain/unconfirmed-transactions` and the health check read only the
page they return, newest first, instead of loading and sorting the whole
mempool on every request. Data version 20: a version 18 or 19 database is
migrated when it is opened, with no resync.
- The block store no longer reads the whole mempool to publish mempool
events, to set the mempool gauge or to find expired transactions. Each
import reports which transactions it added to the mempool or removed from
it; pruning reads only the oldest entries of the index. Before, every
block, every batch of new transactions and every clock tick (several per
second) read the whole mempool at least once.
- Count the transactions of an xpub without building the list of all of them
when the cache is not used.
- Keep the derived addresses of the 512 to 1024 most recently queried xpubs
in memory. Every xpub query derived each address again before reading a
balance. Addresses depend only on the xpub, so the cache never goes stale.
- Page the unspent outputs of an xpub by merging its addresses in order of
block, stopping once the page is full, instead of decoding up to offset
plus limit outputs of every address and sorting them all. The pages are
the same.
- Count the transactions of an xpub by merging the raw keys of its
addresses, without decoding keys or reading values.
- Open the iterators of a query over many addresses in one bracket instead
of one bracket each. Every call into RocksDB walked the stack past one
frame per address.
- Double the page, up to 1024 rows, when streaming a source by offset, as
`/blockchain/unspent` does. The rows read and skipped grew with the square
of the rows returned.
- Check that an xpub is cached in the same Redis round trip as the read of
its balances, transaction count, or a page of its transactions or unspent
outputs that does not start at a transaction.
- Serialize a transaction at most twice to compute its id, size and weight,
and stop looking up its witnesses with a quadratic list index.
- Build on haskoin-core 1.6.1, which encodes CashAddr and Base58 addresses
faster: about 10% less CPU per request on endpoints that return many
addresses.
- The executable uses every core of the host by default (`-N` instead of
`-N4`). Set `+RTS -N<n> -RTS` on the command line to choose a number.
- Read the balances of many addresses, and lists of transactions, with one
RocksDB multi-get instead of one read per key. `StoreReadBase` has a new
method, `getManyTxData`, which defaults to reading the transactions one by
one; `getTransactions` reads many transactions with it.
- Give RocksDB a block cache of 1 GiB by default, shared by all column
families, and keep their index and filter blocks in it at high priority,
with those of level 0 pinned. Before, each column family had RocksDB's
default cache of 32 MiB, and index and filter blocks stayed in memory
outside any cache for every open file. Set the size with `--block-cache-mb`
or `BLOCK_CACHE_MB`; 0 restores the RocksDB defaults. `StoreConfig` and
`withDatabaseReader` take the size in bytes. Requires rocksdb-haskell-jprupp
2.6.0.
### Added
- `store/bench`: a benchmark server that syncs a synthetic regtest chain and
serves the web API on it, and times the encoding of a response with the
argument `micro`. `scripts/bench-web.sh` runs wrk against it and reports
the CPU time of the server per request.
## [1.7.0] - 2026-11-06
### Changed
- Build on haskoin-core 1.6.0 and haskoin-node 2.3.0, the releases with the
fixes of the November 2026 security review. Their changelogs list the
changes to message parsing, header validation and peer handling that the
store now runs with.
- An output has an address only when the network defines one for its script,
as in haskoin-core 1.6.0. A SegWit-shaped output has no address on Bitcoin
Cash. A 256-bit script hash output (`OP_HASH256`, a push of 32 bytes,
`OP_EQUAL`) has none on Bitcoin. Such an output is no longer indexed under
an address, and its `address` is `null`. Entries that an older version
wrote under such an address stay in the database. No request can name them,
since the address has no text form on the network.
- `POST /transactions` takes a body that holds one transaction and nothing
else. Bytes after the transaction are refused, as Bitcoin Core does for a
raw transaction. They used to be ignored.
- `POST /transactions` takes the transaction in the format that peers of the
network read. A network without SegWit, such as Bitcoin Cash, has the
format without witness only.
- `GET /peers` gives the `version` of a peer as a signed number, as
haskoin-core 1.6.0 reads it. A peer that sends version ffffffff has version
-1, where it used to appear as 4294967295.
- Breaking, in `haskoin-store-data`: `toTransaction` takes the `Network` as
its first argument, and the `version` field of `PeerInfo` is an `Int32`.
The binary form of `PeerInfo` is the same bytes as before.
- From haskoin-node 2.3.0: a peer is disconnected when it sends more than
50000 entries in an `inv` or `getdata` message. On Bitcoin Cash a message
may be at most 2 MiB, unless it carries block content. Transactions from
Bitcoin Cash peers are read in the format without witness only.
### Fixed
- A response no longer fails on a transaction with an output that has no
address on the network. Since haskoin-core 1.5.0 the JSON encoder of such
an address threw, which cut the response off. One such output is in Bitcoin
block 211997 (transaction
`a4bfa8ab6435ae5f25dae9d89e4eb67dfa94283ca751f393c1ddc5a837bbc31b`,
output 0).
## [1.6.5] - 2026-11-04
### Fixed
- Build on haskoin-core 1.5.1, which evaluates the ASERT difficulty rule at the
parent block. With 1.5.0 the store rejected a valid block on Bitcoin Cash
mainnet at height 975899.
## [1.6.4] - 2026-11-04
### Added
- Support Bitcoin testnet4 (`NET=btctest4`), from haskoin-core 1.4.0.
- Option `--block-window` (`BLOCK_WINDOW`) to set how many blocks to request
from the syncing peer at a time.
- Option `--write-buffer-mb` (`WRITE_BUFFER_MB`) to cap RocksDB memtables
across all column families, 256 MiB by default (0 = unlimited). Without a
cap the nine column families can keep up to 1.1 GiB of memtables.
- Option `--max-wal-mb` (`MAX_WAL_MB`), 1024 MiB by default (0 = RocksDB
default), to bound the RocksDB write-ahead log: once it is larger, the
column families holding its oldest file are flushed so the file can be
deleted.
- `/dbstats` starts with the memory RocksDB uses outside the GHC heap:
memtables and table readers for each column family, and the block cache.
- The mempool is kept in its own column family, one key per transaction,
instead of as a single list value that every import batch read, loaded
into a hash table and wrote back whole. Data version 19: a version 18
database is migrated when it is opened, with no resync.
### Changed
- Replace monad-logger with the fast-logger `Logger` from haskoin-node 2.0.0.
- Request 64 blocks at a time from the syncing peer instead of 500, and ask
for more once fewer than 16 remain, to bound memory use while catching up.
- haskoin-store-data builds against secp256k1-haskell 2.0.0, which hides the
raw `PubKey` constructor: `XPubSpec` reads its stored key with `pubKey`,
which checks it.
- Build on haskoin-core 1.5.0, haskoin-node 2.1.2 and secp256k1-haskell 2.0.0.
`genesisBlock` no longer takes a context.
- A pay-to-public-key output has no address any more, as in haskoin-core
1.5.0. Its coins cannot be spent with the input script of the P2PKH address
of the same key, so they are no longer counted under that address.
- The block store no longer reads the whole mempool four extra times on every
internal ping: it compares mempool snapshots only when there are pending
transactions to import or expired ones to delete.
- Run with four capabilities (`-N4`) instead of one per core (`-N`), so that
memory overhead does not grow with the size of the host. Override with
`+RTS -N<n> -RTS`.
- Docker image: pin the base image to Debian trixie (RocksDB 9.10) by digest
instead of `debian:latest`, and run with `MALLOC_ARENA_MAX=2` to limit
malloc fragmentation from RocksDB.
- Each `/events` client, websocket or HTTP stream, gets a queue of at most
10,000 events and is disconnected when it fills up, instead of the queue
growing for as long as the client stays connected. Store events that
`/events` does not show are no longer queued for its clients.
- A request waiting for another to load an xpub into the cache retries for
about 30 seconds, with at most 5 seconds between attempts, and then serves
the xpub from the database. It used to retry forever with a delay that
doubled each time.
- Continuous integration on GitHub Actions: build, run both test suites,
and check that the heap stays flat while syncing 6000 regtest blocks.
### Fixed
- Support full-RBF: accept replacements of transactions that do not signal BIP125.
- Correct various space leaks.
- `Unspent` implements `coinInputKind`, new in haskoin-core 1.5.0, from its
output script, so coin selection with it no longer fails at run time.
### Added
- Support for testnet4 on both networks.
## [1.6.3] - 2026-08-31
### Added
- Allow disabling web server to sync block chain only.
## [1.6.2] - 2026-08-13
### Fixed
- Fix upstream regressions in haskoin-node.
## [1.6.1] - 2026-08-13
### Fixed
- Support latest version of haskoin-node.
## [1.6.0] - 2026-08-12
### Fixed
- Support for Bitcoin Cash 256-bit scripts.
- Address parsing now allows only correct lengths.
## [1.5.16] - 2025-05-08
### Changed
- Move to personal repository.
### Removed
- Disable `NO_SLOW` as an option.
### Added
- Allow to set `NO_XPUB` to disable extended public keys.
## [1.5.14] - 2024-12-04
### Changed
- Move `/dbstats` and `/mempool` to slow endpoints section.
### Added
- Cull old transactions from mempool automatically.
## [1.5.13] - 2024-10-25
### Changed
- Dummy release: update upstream LTS Haskell dependency in `stack.yaml` file.
## [1.5.12] - 2024-07-22
### Added
- Metric to track time to import a new block.
- Parameter `no_compact` allowed for backwards compatiblity.
## [1.5.11] - 2024-05-24
### Fixed
- Parameter `noCompact` corrected for `multiaddr` endpoint.
## [1.5.10] - 2024-05-24
### Fixed
- Prune obsolete transactions from outgoing peer requests.
- Remove unnecessary module imports.
## [1.5.9] - 2024-05-23
### Fixed
- Only sync mempool once for each peer.
## [1.5.8] - 2024-05-23
### Fixed
- Dummy release to bump upstream dependency on `haskoin-node`.
## [1.5.7] - 2024-05-23
### Fixed
- Dummy release to bump upstream dependency on `statsd-rupp`.
## [1.5.6] - 2024-05-22
### Changed
- Allow to toggle RocksDB Bloom filters off.
### Fixed
- Correct command-line option behaviour for some rarely-used parametres.
## [1.5.5] - 2024-05-19
### Changed
- Lock Redis before checking if the database needs to be pruned, rather than after.
- Lock xpub in Redis to avoid computing derivations multiple times.
### Fixed
- Rename redis-min-gap to redis-min-addrs to match environment config variable.
## [1.5.4] - 2024-05-07
### Fixed
- Fix Redis bug where old keys weren't pruned quickly enough.
### Changed
- Remove Nomad-specific environment variable parsing for statsd.
## [1.5.2] - 2024-04-24
### Changed
- Use default GHC garbage collector.
## [1.5.1] - 2024-04-23
### Changed
- Compile with GHC 9.8.2.
- Enable optimisations.
## [1.5.0] - 2024-04-06
### Fixed
- Use an optimised topological sort for importing transactions in bulk.
## [1.4.0] - 2024-03-27
### Changed
- Use default optimisation settings.
- Use default RocksDB parameters.
## [1.3.0] - 2024-03-14
### Changed
- Bump upstream dependencies.
## [1.2.5] - 2023-01-31
### Fixed
- Test suite now working again.
## [1.2.4] - 2023-01-31
### Changed
- Bump upstream dependencies.
## [1.2.3] - 2023-12-06
### Changed
- Transactions received via POST are just forwarded to every peer without delay or validation.
- Bump dependency on NQE to resolve async issue.
## [1.2.2] - 2023-10-21
### Fixed
- Fix comparison function for unspent outputs.
### Changed
- Avoid deprecated `param` function from Scotty.
## [1.2.1] - 2023-10-04
### Fixed
- Correct web exception output format (JSON).
- Correct block path parsing order.
## [1.2.0] - 2023-10-03
### Changed
- Upgrade `scotty` dependency and fix incompatibilities.
## [1.1.0] - 2023-09-15
### Added
- Add cache height stats.
- Add database iterator stats.
### Changed
- Detect xpub gap more strictly.
- Use statsd-rupp instead of ekg-stats.
- All stat reporting keys changed.
### Removed
- Remove unsafeInterleaveIO from Web.hs.
- Remove unnecessary WAI middlewares.
- Remove server and client error reporting per endpoint.
## [1.0.2] - 2023-08-25
### Changed
- Code refactoring and simplification.
- Improve logging output.
### Removed
- Do not impose time limits on REST API responses.
### Fixed
- Remove loop in Blockchain.info unspents function.
- Correct documentation for /blockchain/rawblock endpoint.
- Fix no match in record selector address for coinbases.
## [1.0.1] - 2023-08-03
### Changed
- Add compatibility with latest nightly LTS Haskell.
## [1.0.0] - 2023-07-28
### Changed
- Compatibility with latest haskoin-core and haskoin-node packages.
- Use DuplicateRecordFields and OverloadedRecordDot language extensions.
- Modernize package in a backwards-incompatible manner.
- Refactor package extensively.
## [0.65.10] - 2023-05-12
### Changed
- Revert to older LTS Haskell to attempt to resolve memory leak.
### Removed
- Remove unnecessary lock release.
## [0.65.9] - 2023-05-09
### Changed
- Be more aggressive caching individual transactions.
- Introduce a periodic cache mempool sync task.
## [0.65.8] - 2023-05-08
### Changed
- Perform health check in separate thread.
## [0.65.7] - 2023-05-05
### Changed
- Do not sync mempool to Redis if node is not up-to-date.
## [0.65.6] - 2023-05-04
### Changed
- Improve caching ingestion performance.
## [0.65.5] - 2022-09-19
### Added
- Fee field added to Blockchain.info-style export-history endpoint.
### Changed
- Bump version due to Git mistake.
## [0.65.3] - 2022-04-13
### Added
- IPv6 peer support.
## [0.65.2] - 2022-04-13
### Fixed
- Correct lazy bytestring deserialization algorithm for web client.
## [0.65.1] - 2022-04-13
### Changed
- Simplify function in Cache module.
- Bump depenedencies.
## [0.65.0] - 2022-02-03
### Changed
- Spenders now embedded into tx objects in database for performance.
- Use faster IORef instead of slow TVar when ingesting.
- Use mutable hash tables when ingesting.
- Allow to disable unscalable API endpoints.
## [0.64.19] - 2022-02-01
### Added
- Allow to set query timeouts.
## [0.64.18] - 2022-01-21
### Fixed
- Off-by-one error when importing change addresses to cache.
## [0.64.17] - 2022-01-21
### Fixed
- Add change addresses to cache when necessary.
## [0.64.16] - 2022-01-10
### Fixed
- Correct fee calculation for blocks that do not claim all rewards.
## [0.64.15] - 2022-01-07
### Fixed
- Correct scale of cache pruning code.
## [0.64.14] - 2022-01-07
### Fixed
- Always prune to 80% of max cache size.
## [0.64.13] - 2022-01-07
### Fixed
- Avoid doing a hissy fit on transient cache issue.
## [0.64.12] - 2022-01-07
### Fixed
- Prune a little more cache to allow for new keys.
## [0.64.11] - 2022-01-06
### Fixed
- Prune cache more often.
## [0.64.10] - 2021-12-30
### Changed
- Return empty addresses in xpub balances call.
## [0.64.9] - 2021-12-29
### Fixed
- Avoid notifying same transactions in mempool.
## [0.64.8] - 2021-12-26
### Changed
- Use better Fourmolu format.
- Be more precise when counting retrieved items.
### Fixed
- Avoid transactions duplicated in xpub data.
- Refactor some functions to make them more robust.
## [0.64.7] - 2021-12-26
### Fixed
- Optimisations for various Blockchain endpoints.
- More accurate item counts for various web endpoints.
## [0.64.6] - 2021-12-25
### Fixed
- Record cache index time just once per xpub.
## [0.64.5] - 2021-12-25
### Changed
- Add suffix cached to cache entries to avoid conflicts with data entries.
## [0.64.4] - 2021-12-25
### Fixed
- Bring dots back and avoid stats hacks.
## [0.64.3] - 2021-12-25
### Fixed
- Fix typo.
## [0.64.2] - 2021-12-25
### Changed
- Replace dots for underscores in metrics.
## [0.64.1] - 2021-12-25
### Changed
- Automatic formatting.
- Improve cache debug logging.
### Fixed
- Add item count to 'all' query metrics.
## [0.64.0] - 2021-12-25
### Changed
- Improve metrics.
### Fixed
- Get lock before importing transactions to cache.
## 0.63.0
### Fixed
- Make cache updates lightweight.
## 0.62.1
### Fixed
- Fix idempotent transaction elimination bug.
## 0.62.0
### Added
- Configurable Blockchain price URLs.
- Reuse HTTP connections with wreq sessions.
## 0.61.1
### Changed
- Upstream improvements on Base58 performance.
## 0.61.0
### Fixed
- Fixed recursion bug in Blockchain format conversion function.
## 0.60.0
### Fixed
- Correct notifications subsystem.
## 0.59.0
### Fixed
- Correct internal dependency.
## 0.58.0
### Fixed
- Correct output freeing algorithm.
## 0.57.0
### Changed
- Report errors freeing outputs.
## 0.56.0
### Changed
- Report all deleted mempool transactions.
- Crash on certain data corruption.
## 0.55.0
### Changed
- Always have a previous output object in Blockchain inputs.
## 0.54.0
### Added
- WebSocket support.
- Testnet4 support.
## 0.53.11
### Changed
- Dummy version increase to signal upstream update of Haskoin Core.
## 0.53.10
### Fixed
- Correct test that was reversed in previous version.
## 0.53.9
### Removed
- Mempool is no longer synced by default to fix public Bitcoin Core regression.
## 0.53.8
### Changed
- Put derivations stat inside database.
## 0.53.7
### Added
- Added counters for database retrievals.
- Added counter for xpub derivations.
### Changed
- Removed some buggy or unnecessary stats.
## 0.53.6
### Changed
- Improve web server statistics.
## 0.53.5
### Addded
- Endpoint to delete an xpub from cache.
## 0.53.4
### Added
- Debugging when reverting block.
### Fixed
- Negative (headers - blocks) diff shown incorrectly.
- Infinite loop when removing a block's coinbase transaction.
## 0.53.3
### Added
- Blockchain.info endpoint: `q/pubkeyhash/:addr`.
- Blockchain.info endpoint: `q/getsentbyaddress/:addr`.
- Blockchain.info endpoint: `q/pubkeyaddr/:addr`.
- Configurable request body limit size.
## 0.53.2
### Fixed
- Return output in satoshi for some endpoints.
## 0.53.1
### Fixed
- Return 404 in case of bad address.
## 0.53.0
### Added
- Blockchain.info endpoint: `q/addresstohash/:addr`.
- Blockchain.info endpoint: `q/addrpubkey/:pubkey`.
- Blockchain.info endpoint: `q/hashpubkey/:pubkey`.
- Blockchain.info endpoint: `q/getblockcount`.
- Blockchain.info endpoint: `q/latesthash`.
- Blockchain.info endpoint: `q/bcperblock`.
- Blockchain.info endpoint: `q/txtotalbtcoutput/:txid`.
- Blockchain.info endpoint: `q/txtotalbtcinput/:txid`.
- Blockchain.info endpoint: `q/txfee/:txid`.
- Blockchain.info endpoint: `q/txresult/:txhash/:addr`.
- Blockchain.info endpoint: `q/getreceivedbyaddress/:addr`.
- Blockchain.info endpoint: `q/addressbalance/:addr`.
- Blockchain.info endpoint: `q/addressfirstseen/:addr`.
- Support xpubs in `blockchain/rawaddr` endpoint.
### Fixed
- Various latest blocks endpoint fixes.
- Allow empty parameters in Blockchain.info POST requests.
## 0.52.13
### Fixed
- Upstream fixes for unknown inv types.
## 0.52.12
### Fixed
- Fix limits for legacy endpoints.
## 0.52.11
### Added
- Alias for Blockchain.info raw address endpoint.
### Fixed
- Fix unknown message types without payload upstream.
- Randomise peer timeouts upstream.
## 0.52.10
### Fixed
- Fix binary search algorithm for blocks upstream.
## 0.52.9
### Added
- Add Blockchain.info latest block endpoint.
- Add Blockchain.info unconfirmed-transactions endpoint.
- Add Blockchain.info blocks for one day endpoint.
## 0.52.8
### Fixed
- Fix special case for zero limit.
## 0.52.7
### Fixed
- Fix cache bug when too many transactions in mempool.
## 0.52.6
### Changed
- Use rationals for Blockchain.info export-history endpoint arithmetics.
## 0.52.5
### Added
- Support for Blockchain.info export-history endpoint.
### Fixed
- Use strict bytestring decoder for HTTP API client.
## 0.52.4
### Fixed
- Use Base58 addresses by default in Blockchain.info balance querios.
## 0.52.3
### Fixed
- Errors should also contain CORS headers.
## 0.52.2
### Fixed
- Blockchain.info raw address limit should use `limit` parametre and not `n`.
## 0.52.1
### Changed
- Stream multiple transactions when requested.
### Fixed
- Fix missing unspent outputs.
## 0.52.0
### Changed
- Remove unnecessary performance optimisations.
### Fixed
- Reduce balance retrievals for xpubs.
- Hack UTXO ordering to avoid unwanted behaviours.
- Do not merge conduits when there are too many.
## 0.51.0
### Fixed
- Data type for RequestTooLarge was missing.
## 0.50.3
### Added
- Log HTTP request bodies.
### Removed
- Remove web request timeout.
### Fixed
- Do not ignore unknown start tx anchors in conduits.
- Use fast transaction counting in cache.
### Changed
- Use WAI middlewares to manage stats.
## 0.50.2
### Fixed
- Do not use lazy parsers for incoming data that may throw exceptions.
## 0.50.1
### Fixed
- Do not allow incoming POST requests of unlimited body size.
## 0.50.0
### Added
- Limit number of simultaneous xpubs being cached.
## 0.49.0
### Changed
- Improve conduit merging algorithm.
## 0.48.0
### Added
- Timeouts and token bucket for web requests.
- Configurable price fetch interval.
## 0.47.6
### Fixed
- Fix web.all stat.
## 0.47.5
### Changed
- Simplify stats.
## 0.47.4
### Added
- Implement Blockchain.info block height.
- Implement Blockchain.info raw address.
- Implement Blockchain.info balances.
### Fixed
- Make Blockchain.info unspent endpoint more efficient.
- Make Blockchain.info xpubs endpoint more efficient.
### Changed
- Use compact JSON serialization by default everywhere.
## 0.47.3
### Fixed
- Fix serialization bug with unspents.
## 0.47.2
### Fixed
- Fix serialization bug for health check.
## 0.47.1
### Fixed
- Fix serialization bugs for web data types.
## 0.47.0
### Added
- Support for legacy block endpoints.
### Changed
- Serialization now uses bytes library and does interleaved IO.
## 0.46.6
### Added
- Allow comma-separated values in multiaddr.
## 0.46.5
### Changed
- Throw error when offset exceeded instead of truncating it.
## 0.46.4
### Fixed
- Do not compute balances separately for loose addresses when part of an xpub.
### Changed
- Do not fetch entire transaction list for loose addresses.
- Transaction count in wallet object is just a synonym for filtered tx count.
- Use conduits to prevent over-fetching transactions from database.
## 0.46.3
### Fixed
- Make hex value encoding compatible with Java BigInteger decoder.
## 0.46.2
### Changed
- Allow negative confirmations for compatibility with old API.
## 0.46.1
### Added
- Filters for transactions in multiaddr endpoint.
## 0.46.0
### Fixed
- Release to fix unintentional upload.
## 0.45.0
### Added
- Using a tx_index that results in a txid conflict returns a 409 - Conflict.
## 0.44.0
### Changed
- Numeric txid now 53 bits long and doesn't return transactions when hashes collide.
## 0.43.1
### Fixed
- Do not overcount statistics.
## 0.43.0
### Changed
- Transaction index now simply encodes txid as a long number (sorry JS users).
## 0.42.4
### Changed
- Optimise encoding of JSON data for Blockchain.info API.
## 0.42.3
### Changed
- Narrow down the balance for transactions to onlyShow set.
## 0.42.2
### Changed
- Make unspent algorithm more efficient.
## 0.42.1
### Added
- Support for Blockchain.info API unspent endpoint.
### Fixed
- Fix RBF transactions on Blockchain.info API.
## 0.42.0
### Removed
- No more pruning of old mempool transactions.
## 0.41.4
### Fixed
- Correct error computing wallet balances.
## 0.41.3
### Changed
- Use whole active set when computing results for multiaddr.
- Compute correct count of transactions for wallet.
## 0.41.2
### Changed
- Caching mempool is not much slower when pruning, so reversing that change.
## 0.41.1
### Changed
- Only prune mempool every ten minutes or so.
## 0.41.0
### Removed
- No more cache eviction endpoint.
## 0.40.22
### Added
- More metrics for cache.
## 0.40.21
### Added
- Support HTTP GET for multiaddr endpoint.
## 0.40.20
### Added
- Prefix 'app.' in statsd when using Nomad variables.
## 0.40.19
### Added
- Statsd support and pleny of statistics.
### Removed
- Removed use of sync lock for importing xpubs in cache due to volume.
## 0.40.18
### Added
- New options to control cache lock retry count and delay.
### Changed
- Cache xpubs asyncrhonously.
- Mempool syncs fully every refresh cycle.
## 0.40.17
### Changed
- Delete more than 1000 xpubs from Redis if needed.
- Attempt to get lock ten times in order to index a new xpub.
## 0.40.16
### Fixed
- Fix best block not set.
## 0.40.15
### Fixed
- Do not update cache best block if it is higher.
## 0.40.14
### Fixed
- Always respond to cache pings to avoid getting stuck.
## 0.40.13
### Added
- Be more careful about importing blocks to the cache.
### Removed
- Reduce excessive cache logging.
## 0.40.12
### Fixed
- Correct bad arithmetics in cache cooldown.
## 0.40.11
### Added
- Debug log cache cooldown.
### Fixed
- Unlimited retry lock acquisition now works.
- Make locking tighter
## 0.40.10
### Changed
- Reduce the number of things that cache do when pinged.
## 0.40.9
### Fixed
- Avoid filling the cache actor mailbox with pings.
## 0.40.8
### Fixed
- Correct a typo in cache code.
## 0.40.7
### Changed
- Improve cache mempool sync algorithm.
## 0.40.6
### Changed
- Make cache cooldown a number.
## 0.40.5
### Added
- Log every non-successful query.
## 0.40.4
### Fixed
- Use Redis TTL for cache cooldown.
## 0.40.3
### Fixed
- Mempool no longer gets saved in cache when node is not in sync.
## 0.40.2
### Changed
- Change source of price data to https://blockchain.info/ticker.
## 0.40.1
### Removed
- Do not expose Paths_haskoin_store module explicitly.
## 0.40.0
### Added
- Blockchain.info API compatibility for multiaddr and rawtx endpoints.
### Changed
- Segwit fields are no longer omitted on incompatible networks.
## 0.39.0
### Changed
- Upgrade Haskoin Core to support higher version on witness addresses.
## 0.38.4
### Fixed
- Fix block search by timestamp.
## 0.38.3
### Changed
- Disable low latency garbage collector by default.
## 0.38.2
### Changed
- Use GHC 8.10 and its low latency garbage collector.
## 0.38.1
### Changed
- Optimise algorithm for fork safety check.
## 0.38.0
### Added
- Support for Bitcoin Cash hard fork.
## 0.37.5
### Added
- Configurable cache refresh time.
## 0.37.4
### Fixed
- Now request mempool when connecting even if already in sync.
### Changed
- Add a delay to mempool sync to allow for block headers to catch up.
- Attempt to sync mempool whenever syncing is done or a new peer connects.
## 0.37.3
### Changed
- Correct logic error when deleting superseded transactions.
## 0.37.2
### Changed
- Simplify multiple algorithms to hopefully solve corruption bug.
- Allow to disable mempool transaction indexing via command line.
## 0.37.1
### Changed
- Better locking around caching operations.
- Have a global cooldown on cache mempool updates.
### Fixed
- Fix address unspent retrieval using correct column family.
## 0.37.0
### Added
- Add support for column families and prefixes breaking database backwards compatibility.
## 0.36.2
### Fixed
- Fix another place where mempool sorting was wrong.
## 0.36.1
### Fixed
- Fix wrong sorting of mempool transactions in database.
## 0.36.0
### Changed
- Do not use STM transactions because it is impossible to reason about preloading.
- Make importing blocks after mempool is populated faster.
## 0.35.2
### Changed
- Reduce frequency of cache mempool updates.
## 0.35.1
### Changed
- Remove cache lock retries.
- Do not use lock when caching a new xpub.
## 0.35.0
### Changed
- Use new RocksDB Haskell bindings.
- Make headers - blocks diff configurable in health check.
- Simplify locking in cache.
## 0.34.8
### Changed
- Minor refactoring.
- Only send one mempool message ever.
## 0.34.7
### Changed
- Fix block heights endpoint URL.
## 0.34.6
### Removed
- Remove asynchronous database retrieval permanently due to instability.
## 0.34.5
### Added
- Preload memory before freeing outputs.
## 0.34.4
### Added
- Asynchronous preloading only for blocks.
## 0.34.3
### Removed
- Disable asynchronous preloading to prevent segmentation fault error.
## 0.34.2
### Removed
- No more upper limit for mempool call.
### Fixed
- Health check uses minimum between last block and mempool tx.
## 0.34.1
### Added
- Pending mempool transactions health check.
### Removed
- No more upper limit for mempool call.
## 0.34.0
### Changed
- New format for health check.
## 0.33.1
### Changed
- Upload with updated Cabal files.
## 0.33.0
### Fixed
- Fix outputs showing up as both spent and unspent.
### Changed
- Simplify data structures used to hold uncommitted changes.
- Split StoreRead class in two.
- Improve pre-loading algorithms.
## 0.32.3
### Fixed
- Fix command line argument mappings to env vars.
## 0.32.2
### Fixed
- Do not complain when deleting non-existent unconfirmed txs.
## 0.32.1
### Fixed
- Fix corruption bug when deleting transactions during some reorgs.
- Fix tests on data package.
- Rename upstream address string functions.
## 0.32.0
### Changed
- Concurrently load dependencies when importing transaction data.
- Import each transaction using STM.
- Rework logging.
- Refactor all block chain importing algorithms.
- Use peer locking when importing data.
- Change license to MIT.
### Added
- Make max peer count configurable.
### Fixed
- Prevent premature peer timeouts when importing blocks.
## 0.31.0
### Added
- Add Haskell web client code to data library.
- Use type-safe definitions for web paths and parameters.
- Support JSON pretty encoding and enable by default for some endpoints.
- Allow environment variables for configuration.
### Changed
- Change command-line arguments to better fit GNU style.
- Refactor code to manipulate address balances.
- Improve logging.
- Rate-limit mempool importing.
- Do not add xpubs to cache if node not in sync.
- Do not import transactions to cache if no xpubs in cache.
- Refactor transaction importing logic extremely.
- Refactor memory database and writer.
### Fixed
- Fix BTC double-count transaction bug.
- Add missing xpub derive parameter to xpub evict documentation.
## 0.30.1
### Changed
- Limit mempool API endpoint list.
## 0.30.0
### Changed
- Raw JSON values are now wrapped in an object with a result property.
- Better logging when importing transactions into mempool.
### Fixed
- Transaction limit by block height works now.
## 0.29.3
### Changed
- Revert concurrent retrieval changes from 0.29.1 and 0.29.0 to solve stability
issues.
- Bitcoin Cash (BCH) replaces BTC as default network in CLI.
- Peer discovery enabled automatically if no peers specified in CLI.
- Use separate Stack configuration file for data package.
## 0.29.2
### Changed
- Increase timeouts for manager and chain health checks.
## 0.29.1
### Added
- Perform xpub operations concurrently.
## 0.29.0
### Changed
- BlockTx renamed to TxRef.
- Remove unnecessary monad transformers to simplify import code.
### Added
- Retrieve balances and unspent outputs concurrently when importing.
- Coin instance for Unspent in data package.
## 0.28.0
### Changed
- Change the way that limits, start, and offset values are handled.
### Fixed
- Fix incorrect limit responses.
## 0.27.0
### Added
- Complete support for offset.
### Changed
- Improve monad stack for cache.
## 0.26.6
### Added
- Support for offset in all endpoints where it makes sense.
## 0.26.5
### Fixed
- Sort after using the nub function or use Data.List.nub in exceptional cases.
## 0.26.4
### Changed
- Don't do certain validity checks on confirmed transactions.
### Fixed
- Do not crash when syncing the blockchain from scratch on a populated cache.
## 0.26.3
### Changed
- Replace nub function everywhere with faster version written using hash sets.
### Fixed
- Fix shared cache locking.
## 0.26.2
### Changed
- Simplify cache block import code.
- Improve cache import performance.
## 0.26.1
### Fixed
- Do not call zadd or zrem in Redis with incorrect argument count.
### Changed
- Do not use slow Transaction type in Logic.
- Improve logging while importing blocks.
- Better transaction import algorithm.
## 0.26.0
### Changed
- Add information to some binary types for feature parity with JSON.
## 0.25.4
### Changed
- Hide segwit data on non-segwit networks.
### Fixed
- Fix work which now always serialises as a number literal.
## 0.25.3
### Changed
- Fix version display on health check.
## 0.25.2
### Changed
- Fix wrong version of Haskoin Store Data dependency.
## 0.25.1
### Changed
- Improve code organisation.
- Split data definitions and serialisation into its own package.
## 0.24.0
### Changed
- Use mocking to simulate peers instead of connecting to the network while testing.
- Depend on latest version of Haskoin Core for faster JSON serialisation.
- Clean up confusing JSON encoding/decoding codebase.
## 0.23.24
### Changed
- Implement faster JSON encoding using toEncoding from the Aeson library.
## 0.23.23
### Changed
- Do not read full mempool so often from cache code.
## 0.23.22
### Changed
- Depend on latest Haskoin Node that fixes debugging regression.
## 0.23.21
### Changed
- Reduce non-debug log verbosity.
## 0.23.20
### Changed
- Better Haskoin Node logging.
## 0.23.19
### Changed
- Use set peer timeout instead of constant in block store.
## 0.23.18
### Changed
- Allow setting peer timeouts in command line.
### Fixed
- Bump Haskoin Node dependency to fix another premature timeout condition.
## 0.23.17
### Fixed
- Touch syncing peer whenever we process one of its blocks to avoid premature timeout.
## 0.23.16
### Changed
- Better algorithm to avoid importing transaction multiple times in cache.
- Depend on latest Haskoin Node.
## 0.23.15
### Changed
- Do not storm the cache with mempool transactions.
## 0.23.13
### Fixed
- Do not ignore deleted incoming transactions.
## 0.23.12
### Fixed
- Do not do RBF checks when replacing a mempool transaction with a confirmed one.
## 0.23.11
### Fixed
- Streamline mempool transaction importing.
## 0.23.10
### Fixed
- Fix transactions not recorded in cache mempool set.
- Fix transactions being downloaded multiple times.
### Removed
- Do not store orphan transactions in database.
### Changed
- Use sets for incoming transactions instead of lists.
- Do not do anything to the cache if there are no xpubs in it.
## 0.23.9
### Fixed
- Wiping mempool fixed.
## 0.23.8
### Added
- Chunk transactions to be deleted from mempool.
## 0.23.7
### Added
- Mempool improvements.
## 0.23.6
### Added
- Ability to wipe mempool at start.
- Improvements to mempool processing code.
## 0.23.5
### Changed
- Tighten the locking loop to avoid slow cache building.
## 0.23.5
### Fixed
- Wrong error in cache when acquiring lock.
## 0.23.4
### Added
- Add extra debug logging for cache code.
### Fixed
- Fix a bug with xpub growing algorithm.
### Changed
- Use locks instead of transactions to update cache.
## 0.23.3
### Fixed
- Reduce contention when many instances of Haskoin Store share a cache.
## 0.23.2
### Added
- Allow retrieving xpub data without using cache.
## 0.23.1
### Added
- Allow xpub eviction from cache via API.
- Clarify cache address addition code.
### Fixed
- Balances were incorrectly computed in cache when new transactions arrived.
## 0.23.0
### Added
- Support for Redis transactions.
- Use a smaller initial gap for empty xpubs.
### Changed
- Remove custom JSON encoding class.
- Refactor and code simplification.
## 0.22.5
### Fixed
- Cache was being completely pruned.
## 0.22.4
### Fixed
- Cache now prunes correctly.
## 0.22.3
### Fixed
- Bug was making cache get stuck when pruning.
## 0.22.2
### Changed
- More efficient algorithms for caching and cache misses.
- Better debug logging of cache hits and misses.
## 0.22.1
### Added
- More debug logging for cache hits.
### Fixed
- Bug using maximum against empty list.
## 0.22.0
### Changed
- Extreme code refactoring.
- Move all code to Haskoin and drop Network from modules.
### Added
- Use Redis pipelining when importing multiple transactions into cache.
- Implement configurable LRU for Redis cache.
- Import xpubs directly into cache from web worker thread when a key is requested.
### Removed
- Only expose a few modules to external API.
## 0.21.7
### Changed
- Improve build configuration.
### Fixed
- Use minimum used addresses instead of minimum index for xpub cache decision.
## 0.21.6
### Fixed
- Fix missing xpub unspent outputs when using cache.
## 0.21.5
### Added
- Only store xpubs in cache if they have more than a threshold addresses used.
## 0.21.4
### Fixed
- Fix shared cache case where head is set beyond header chain by another node.
## 0.21.3
### Fixed
- Fix bug where best head was not being registered in cache.
- Fix best head in cache being decoded incorrectly.
## 0.21.2
### Added
- Complete support for Redis xpub cache.
## 0.21.1
### Fixed
- Latest version of secp256k1-haskell works with Debian 9.
## 0.21.0
### Fixed
- Fix output of web API calls when issuing limits with offsets.
### Changed
- Massive refactoring of entire codebase.
### Added
- Work in progress Redis caching for extended public keys.
## 0.20.2
### Changed
- Filter xpub address balances on web API to show only addresses that have been used.
### Removed
- Remove paths and addresses from xpub summary.
## 0.20.1
### Changed
- Refactor code greatly.
- Depend on new Haskoin Store package to avoid missing tx broadcasts.
- Merge StoreStream class into StoreRead.
- Move former streaming functions to use lists instead of conduits.
- Remove excessively verbose debugging.
## 0.20.0
### Added
- Set minimum version bounds for some dependencies.
- Now compatible with GHC 8.8.
- Extended key caching system using Redis.
### Changed
- Massively refactored codebase.
- Less verbose debug logging.
### Removed
- Removed conduits for faster queries.
## 0.19.6
### Added
- Use a parallel strategy to compute key derivations.
### Fixed
- Do not fail health check upon transaction timeout while syncing.
### Changed
- Do not use conduits for xpub balance streams.
- Multiple minor refactorings.
## 0.19.5
### Changed
- Minor refactor to block import code.
### Fixed
- Minor fix to transaction timeout check.
## 0.19.4
### Fixed
- Clarify and correct health check algorithm.
## 0.19.3
### Changed
- Add address transactions to cache.
- Improve multi-address transaction retrieval algorithms.
## 0.19.2
### Removed
- Cache-Control header turned out to be unnecessary.
### Fixed
- Fix some minor errors in web module.
## 0.19.1
### Added
- Set Cache-Control header to no-cache.
## 0.19.0
### Changed
- Store mempool in single key/value pair.
## 0.18.11
### Changed
- Do not stream mempool.
## 0.18.10
### Removed
- Disable timeout checks for testnets.
## 0.18.9
### Added
- Endpoint to locate a block by unix timestamp.
### Removed
- No more persistence for peers due to dependency on newest haskoin-node.
## 0.18.8
### Added
- Transaction and block timeouts for health check.
- Raw blocks.
## 0.18.7
### Fixed
- Missing tranasctions on xpub listings.
## 0.18.6
### Removed
- Follow Stack advise removing `-O2` GHC option.
## 0.18.5
### Added
- Compatibility with SegWit on extended public key endpoints.
### Changed
- Fix syncing peer not reset after timeout.
- Use simpler monad for streaming data.
## 0.18.4
### Changed
- Bump Haskoin Node to fix peers not stored and excessively verbose logging.
## 0.18.3
### Changed
- Configurable HTTP request logging. Disabled by default.
## 0.18.2
### Changed
- Fix for memory leak.
## 0.18.1
### Removed
- Remove transaction count from xpub summary object.
## 0.18.0
### Changed
- Simplified limits and start point handling on web API.
- Made transaction streaming algorithm faster for xpub transactions.
- Extended public key summary output contains all addresses that have received transactions.
### Added
- Fine-grained control for maximum limits via command line options.
- Transaction hash as starting point.
- Block hash as starting point.
- Timestamp as starting point.
- Configurable xpub gap limit.
- Transaction count added to xpub summary.
- UTXO count added to xpub summary.
### Removed
- Mempool endpoint now has no limits or offsets and always returns full list.
- Extended public key summary output no longer includes any transactions.
- Offsets not allowed for transaction lists involving multiple addresses or xpubs.
- Confusing block position parameter no longer part of web API.
## 0.17.2
### Changed
- Stream address balances and unspent outputs.
- Add configurable max value for limit and offset which defaults at 10000.
## 0.17.1
### Changed
- When posting a transaction to the network, timeout is now five seconds.
- Improve error message when transaction post timeout reached.
- Remove obsolete `not found` error for transaction post.
- Endpoints for retrieving blocks now do streaming for better performance.
- Improve Swagger API documentation.
## 0.17.0
### Added
- Endpoints for retrieving block transactions.
- Endpoint for retrieving set of latest blocks.
### Changed
- Use standardized JSON and binary serialization schemes for raw transaction endpoints.
## 0.16.6
### Changed
- Now logging info messages too by default.
- Consolidated web logging in middleware.
### Removed
- UUIDs for web requests.
## 0.16.5
### Removed
- Remove concurrency from xpub balance requests to prevent RocksDB segfaults.
## 0.16.4
### Removed
- Remove concurrency from requests using iterators to prevent RocksDB from segfaulting.
## 0.16.3
### Added
- Debugging information for web API.
## 0.16.2
### Changed
- Debugging disabled by default (use `--debug` to enable).
## 0.16.1
### Added
- Cache mempool transactions.
- Improve initial syncing performance.
## 0.16.0
### Added
- Orphan transaction support.
- Full address balance cache in RocksDB.
- Full unspent output cache in RocksDB.
### Changed
- Significantly refactor code.
- Move web stuff to its own module.
- Change types related to databases.
- Make xpub balance, transaction and unspent queries fetch data in parallel.
## 0.15.2
### Added
- Internal data types to support orphan transactions.
### Changed
- Do not spam block actor with pings.
- Fix balance/unspent cache not reverting when importing fails.
- Fix transaction sorting algorithm not including transaction position information.
- Fix conflicting mempool transaction preventing block from importing.
## 0.15.1
### Changed
- Fix duplicate coinbase transaction id bug.
## 0.15.0
### Removed
- Removed `PreciseUnixTime` data type.
### Changed
- Use 64 bits for Unix time representation.
- Data model now uses simplified Unix time representation.
## 0.14.9
### Added
- Last external/change index information to xpub summary object.
## 0.14.8
### Added
- Endpoint for xpub summaries.
- Endpoints for full transactions.
- Ability to query by offset/limit.
- More API documentation.
## 0.14.7
### Added
- Debug information for `publishTx`.
### Changed
- Transaction publishing no longer requests mempool.
- Fixed serialization for `TxId` freezing the entire program by infinitely recursing.
## 0.14.6
### Changed
- Enable full threading again as it was deemed not responsible for the freezing behaviour.
## 0.14.5
### Changed
- Enable threading but leave it at a single thread to be able to open more than 1024 files.
## 0.14.4
### Changed
- Target LTS Haskell 13.20 and disable threading in new attempt to fix freezing bug.
## 0.14.3
### Changed
- Remove `-O2`.
## 0.14.2
### Changed
- Target LTS Haskell 12.26 to attempt to fix freezing bug.
## 0.14.1
### Added
- Extra debugging around code that freezes.
### Changed
- Bump dependency on `haskoin-node`.
## 0.14.0
### Removed
- Dump slow protobuf serialization.
### Added
- Add custom serialization.
- Extra debug logging.
### Changed
- Bump `haskoin-core` and `haskoin-node`.
## 0.13.1
### Changed
- Bump `haskoin-node` in `stack.yaml`.
- Do not send empty `getdata` messages.
## 0.13.0
### Added
- Primitive content negotiation for web exceptions.
- Protobuf support for errors.
- Protobuf support for tranasction ids.
### Changed
- Protobuf format changed in non-backwards-compatible manner for transaction ids.
## 0.12.0
### Added
- Support for binary serialization using Protocol Buffers.
- New endpoints for binary raw transactions (not hex-encoded).
### Changed
- Services field now a hex string instead of a number to avoid overflowing signed 64-bit integer.
- Flatten list of block data objects when responding to request for multiple block heights.
- Errors now reported in plain text without container JSON object.
- Transaction broadcasts are responded to with transaction id in plaintext hex (no JSON).
- Remove database snapshots to improve performance.
## 0.11.2
### Changed
- Fix duplicate mempool transaction announcements in event stream.
## 0.11.1
### Removed
- Removed latest block time check.
## 0.11.0
### Changed
- Improve post transactions endpoint.
## 0.10.1
### Changed
- Fix bug where transaction lists from multiple addresses would sort incorrectly.
- Address gap reduced to 20.
## 0.10.0
### Removed
- Remove addresses from transaction lists.
- No longer use container objects for xpub transactions.
## 0.9.3
### Added
- Permissive CORS headers to allow queries from any domain.
- Improved documentation using real-world examples from the BCH testnet.
## 0.9.2
### Added
- HTTP JSON API switch to turn off transaction list when retrieving blocks.
## 0.9.1
### Added
- Total block fees.
- Total block outputs.
- Block subsidy.
### Changed
- Do not consider the blocks less one block away from headers as out of sync in health check.
- Health check now returns HTTP 503 when not OK or out of sync.
## 0.9.0
### Added
- Version to health check output.
- Block weight for segwit.
- Transaction weight for segwit.
## 0.8.1
### Added
- Health check endpoint.
## 0.8.0
### Added
- Limits and skips.
- Add timestamps to transactions.
- Add transaction count to address balance object.
- Add Merkle root to block data.
- Total funds received by an address now shows up in balance.
- Balances for any address that ever had funds show up in xpub endpoints.
### Changed
- Data model update.
- Performance improvement for xpub calls.
- Transactions are returned in reverse mempool/block order (highest or most recent first).
- Balance objects do not get deleted from database ever.
## 0.6.9
### Changed
- Reduce number of coinbase checks to 10,000 ancestors.
## 0.6.8
### Changed
- Further optimize coinbase after height checks.
## 0.6.7
### Changed
- Impose restrictions on recursion for coinbase after height checks.
## 0.6.6
### Added
- Check whether a transaction can be traced back to a coinbase after certain height.
## 0.6.5
### Changed
- Delete transactions in reverse topological order when reverting a block.
## 0.6.4
### Changed
- Do not fail silently when importing orphan transactions into the mempool.
## 0.6.3
### Changed
- Dummy release to bump haskoin-node in stack.yaml.
## 0.6.2
### Changed
- Correct bug where coinbase transactions weren't properly flagged.
## 0.6.1
### Changed
- Compatibility with Bitcoin Cash hard fork.
- Various bug fixes.
## 0.6.0
### Added
- Address balance cache in memory.
### Changed
- Simplify data model further.
- Fix bug importing outputs with UTXO cache.
- Unspent balances cannot be negative.
## 0.5.0
### Added
- Add UTXO cache in memory.
- Get transactions with witness data in segwit networks.
### Changed
- Paths for derivations in xpubs is a list and no longer a string.
- Various bug fixes.
## 0.4.2
### Removed
- Remove extended public key itself from output of relevant endpoints to save bandwidth.
## 0.4.1
### Changed
- Fix bug when deleting coinbase transactions.
- Extended public key API support.
## 0.4.0
### Changed
- Generate events for mempool transactions.
- Respond with entire block data when querying blocks by height.
## 0.3.1
### Changed
- Do not import transactions to mempool while not synced.
- Only sync mempool against a single peer.
- Allow duplicate transactions to fix re-introduced sync bug.
## 0.3.0
### Added
- Update dependencies.
- Keep orphan blocks and deleted transactions in database.
- Add a `mainchain` field for block data and a `deleted` field for transactions.
- Stream records for performance.
- Show witness data for transaction inputs in SegWit network.
- Support RBF in SegWit network.
### Changed
- Refactor all data access code away from actor.
- Refactor import logic away from actor.
- Abstract data access using typeclasses.
- Implement data access using clean layered architecture.
- Make most of import logic code pure.
- Database now in `db` as opposed to `blocks` directory.
- Use latest `haskoin-node`.
### Removed
- Remove some data from peer information output.
- Remove full transaction from address transaction data.
- Remove limits from address transaction data.
- Remove block data from previous output.
- Remove spender from JSON response when output not spent.
- Remove block hash from block reference.
## 0.2.3
### Removed
- Do not send transaction notifications if a block is being imported.
## 0.2.2
### Added
- Peer information endpoint.
### Changed
- Update `haskoin-node`.
## 0.2.1
### Changed
- Fix tests
## 0.2.0
### Added
- Documentation everywhere.
- Ability to retrieve address transactions.
### Changed
- New versions of NQE and Haskoin Node upstream.
- Improve and simplify API.
- Multi-element endpoints return arrays of arrays.
- Database snapshots for all queries are now mandatory.
### Removed
- Retrieving unspent and spent outputs for an address.
- Redundant API endpoints for multiple elements.
## 0.1.3
### Changed
- Fix a bug with transaction notifications.
- Improve handling orphan transactions.
## 0.1.2
### Changed
- Specify dependencies better.
## 0.1.1
### Changed
- Dependency `secp256k1` is now `secp256k1-haskell`.
## 0.1.0
### Added
- New `CHANGELOG.md` file.
- Bitcoin (BTC) and Bitcoin Cash (BCH) compatibility.
- RocksDB database.
- Mempool support.
- HTTP streaming for events.
- CashAddr support.
- Bech32 support.
- Rate limits.
### Changed
- Split out of former `haskoin` repository.
- Use hpack and `package.yaml`.
### Removed
- Removed Stylish Haskell configuration file.
- Remvoed `haskoin-core` and `haskoin-wallet` packages from this repository.