This is a minor release: 1.27.5. It does not require a hardfork nor a hived node upgrade (although it is recommended). Upgraded nodes will require a full replay.

Most of changes is specific to API nodes improvements like also this version is required by HAF node.

1. Hive/Blockchain features/improvements
   • Hardfork 28 changes (note: date in code is a placeholder HF28 date, likely to change in the future):
     • Multiple recurrent transfers for same sender/receiver pair: https://gitlab.syncad.com/hive/hive/-/merge_requests/870
     • Tests and fix (enabled at HF28) related to bad vests/hive price rounding that lead to improper calculations at very early hardforks: https://gitlab.syncad.com/hive/hive/-/merge_requests/901
   • Account history API improvements (defines an explicit operation filter for API calls): https://gitlab.syncad.com/hive/hive/-/merge_requests/898
   • All condenser API methods return result sets using the JSON legacy form: https://gitlab.syncad.com/hive/hive/-/merge_requests/964
   • proposal_pay_operation (virtual operation) uses less space (unneeded fields have been removed): https://gitlab.syncad.com/hive/hive/-/merge_requests/973
   • Ability to specify some chain parameters in non-mainnet builds in order to simplify testing: https://gitlab.syncad.com/hive/hive/-/merge_requests/888
   • Fix bugs related to fc logger (file appenders):
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/934
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/946
   • Fix random crash at hived exit: https://gitlab.syncad.com/hive/hive/-/merge_requests/990
   • The auto-generated block_log.artifacts file has a new format and supports interruption and better consistency validation:
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/949
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/974
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/983
   • Improve validation of snapshot consistency (improved validation):
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/913
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/919
     • loading a snapshot automatically wipes any old shared memory file (previously the loading aborted with an error message): https://gitlab.syncad.com/hive/hive/-/merge_requests/969
   • Resource constraint (RC) code moved closer to the chain code, slightly reducing memory footprint, making it more core-code compliant, and iteratively preparing for RC to be part of consensus in the future:
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/917
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/951
   • In order to speed up file IO, hived has a new dependency: uring library https://gitlab.syncad.com/hive/hive/-/merge_requests/968
   • Code cleanup:
     • Removed legacy operation classes & related code: https://gitlab.syncad.com/hive/hive/-/merge_requests/923
     • Removed support for unused automated actions: https://gitlab.syncad.com/hive/hive/-/merge_requests/938
2. New beekeeper tool that safely holds customer keys and signs Hive transactions without a need to directly access private keys:
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/902
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/929
   • Beekeeper is directly accessible from JS environments (e.g. web browser): https://gitlab.syncad.com/hive/hive/-/merge_requests/976
3. DevOps/CI improvements:
   • Common job definitions used across several Hive repos: https://gitlab.syncad.com/hive/hive/-/merge_requests/765
   • Mirrornet conversion can be done automatically: https://gitlab.syncad.com/hive/hive/-/merge_requests/877
4. Tests improvements:
   • Unified unit tests startup by sharing regular hived code inside Boost Unit Test framework: https://gitlab.syncad.com/hive/hive/-/merge_requests/948
   • Shared tools/test code across HAF repo: https://gitlab.syncad.com/hive/hive/-/merge_requests/892
   • Thorough tests specific to Account History API: https://gitlab.syncad.com/hive/hive/-/merge_requests/928
   • Improved tests related to decline_voting_rights behavior
   • Dedicated test scenarios for verifying account recovery system https://gitlab.syncad.com/hive/hive/-/merge_requests/885
   • Dedicated test scenarios for power up https://gitlab.syncad.com/hive/hive/-/merge_requests/911
   • Dedicated test scenarios for limit order create: https://gitlab.syncad.com/hive/hive/-/merge_requests/927

and more (to be supplemented soon)

Warning: this update changes hived state format and requires hived node replay, if you are using version 1.27.3 or earlier.

1. General notes: upgrade to Ubuntu 22.04 as base supported OS: https://gitlab.syncad.com/hive/hive/-/merge_requests/838
2. New features:
   • new virtual operations emitted: https://gitlab.syncad.com/hive/hive/-/merge_requests/332
   • prepare code for new Hardfork 28
   • prerequisites for strict matching of Hived data structures to the shared_memory.bin and snapshot contents: https://gitlab.syncad.com/hive/hive/-/merge_requests/784
3. Hived bugfixes:
   • fixed shutdown problems:
     • while executing broadcast_transaction_synchronuous: https://gitlab.syncad.com/hive/hive/-/merge_requests/812
     • when --exit-before-sync was used: https://gitlab.syncad.com/hive/hive/-/merge_requests/833
   • plugin/index state is more strict verified (Issue #423): https://gitlab.syncad.com/hive/hive/-/merge_requests/772
   • fixed cli_wallet shutdown problems leading to random failure: https://gitlab.syncad.com/hive/hive/-/merge_requests/726
   • elimination of custom fc::uint128 implementation (standard builtin GCC type is used): https://gitlab.syncad.com/hive/hive/-/merge_requests/804
   • silent truncation of fixed_string is eliminated (what could lead to silent modification of broken operations in transaction - now they will explicitly fail): https://gitlab.syncad.com/hive/hive/-/merge_requests/794
   • Fixed transaction counter in AH RockDB plugin (to improve reporting): https://gitlab.syncad.com/hive/hive/-/merge_requests/850
   • Fixed impacted account collection (leads to AH collection) for comment_payout_beneficiaries: https://gitlab.syncad.com/hive/hive/-/merge_requests/844
   • Account History API better handles history data coming from reversible blocks: https://gitlab.syncad.com/hive/hive/-/merge_requests/866
   • RC mana can't go under zero anymore: https://gitlab.syncad.com/hive/hive/-/merge_requests/863
4. Python regression test improvements:
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/811
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/683
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/813
   • database_api suite extended: https://gitlab.syncad.com/hive/hive/-/merge_requests/516
   • dedicated performance test suite for recurrent transfers to show corner cases: https://gitlab.syncad.com/hive/hive/-/merge_requests/823
   • enhanced suite related to condenser_api, transaction_status_api https://gitlab.syncad.com/hive/hive/-/merge_requests/816, https://gitlab.syncad.com/hive/hive/-/merge_requests/795
   • created tests specific to decline_voting_rights and proxy operations: https://gitlab.syncad.com/hive/hive/-/merge_requests/851, https://gitlab.syncad.com/hive/hive/-/merge_requests/815
   • new tests for market_history_api: https://gitlab.syncad.com/hive/hive/-/merge_requests/826
   • enhanced tests specific to recurrent transfers: https://gitlab.syncad.com/hive/hive/-/merge_requests/807
5. Low level unit tests extended by suite of tests covering AH calls (prerequisites to internal code cleanup/refactoring, which will need good test base):
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/810
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/825
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/862
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/867
   • https://gitlab.syncad.com/hive/hive/-/merge_requests/874
6. Devops/workflow automation:
   • dockerized setup fixes/simplifications (mostly solved permission issues):
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/865
     • https://gitlab.syncad.com/hive/hive/-/merge_requests/869
   • Simplify replay of test node and use GitLab cache to lower resource usage during testing: https://gitlab.syncad.com/hive/hive/-/merge_requests/801
   • Official Hive images can be published by automatic job: https://gitlab.syncad.com/hive/hive/-/merge_requests/868

Restore the prior timeshare/backup witness scheduling behavior. Due the nature of this change it is a hardfork release.

Optional bugfix release: snapshot dump and load extended by generic_index::_next_id to prevent update_proposal failures on nodes configured using snapshot.

https://hive.blog/hive/@hiveio/the-evolution-of-hive-hardfork-26

Full Changelog: https://github.com/openhive-network/hive/compare/v1.25.0...v1.26.0

Consensus changes

• new operation and API to enable recurrent transfers
• new operation and API to convert Hive to HBD + https://gitlab.syncad.com/hive/hive/-/merge_requests/215 + https://gitlab.syncad.com/hive/hive/-/issues/129
• expire old governance votes + https://gitlab.syncad.com/hive/hive/-/merge_requests/172 + https://gitlab.syncad.com/hive/hive/-/merge_requests/174 + https://gitlab.syncad.com/hive/hive/-/merge_requests/181 + https://gitlab.syncad.com/hive/hive/-/merge_requests/195 + https://gitlab.syncad.com/hive/hive/-/merge_requests/213
• changes to curation window and curation rewards calculation + https://gitlab.syncad.com/hive/hive/-/merge_requests/204
• only pay interest on HBD held in savings account + https://gitlab.syncad.com/hive/hive/-/merge_requests/203
• don't allow voting on expired proposals
• allow shortening the end date of a proposal
• re-allow vote operation for already paid posts
• hardfork 25 set trigger at June 30, 2021 at 14:00 UTC

New command-line options

• added account-history-rocksdb-dump-balance-history option to account-history-rocksdb to create a CSV file recording account balance changes

Bug fixes

• fix condenser_api.get_key_references not returning keys for claimed accounts
• fix duplicate operations in get_account_history due to operations being flushed to history db at wrong time
• fix duplicate operations in get_account_history due to reversion of last irreversible block on startup
• fix #139 enum_virtual_ops gives also non-virtual ops
• fix #96 get_account_history not returning expected number of operations
• restore use of the unlinked_index cache which holds blocks that aren't currently linkable to the head block + https://gitlab.syncad.com/hive/hive/-/merge_requests/226
• remove unavailable item from active sync requests, fix node stuck issue
• account history operation filter needs to be 64bit not just in filter enum
• fix libreadline static link with cli_wallet + https://gitlab.syncad.com/hive/hive/-/issues/143
• remove shared_memory.bin when --force-replay flag is specified
• fix rounding errors in proposal payouts and maintenance window timings
• fix for recently introduced replay problem caused by empty recovery account
• fix unstable behavior related to --exit-after-replay flag
• fix crash when node started with account-history-rocksdb plugin configured without a blockchain directory created
• fix get open orders cli_wallet command threw an exception when casting asset type
• fix chain-id related problem causing to fail testnet configuration when custom chain-id has been passed through hived commandline
• fix for bug in new recurring transfers operation
• Fixed issue #162: hived crash when invoked with --resync-blockchain and block_log/sharedmem files do not exist
• Fixed assertion failure during early block evaluation (caused by improper Last Irreversible Block update)

New API calls

• new network node API calls: get_info, add_node, set_allowed_peers, get_connected_peers

Miscellaneous changes

• allow the timestamps printed in log messages to be formatted in several different ways
• improve error message on bad call to fc::static_variant::get<> method
• extension in 'update_proposal' is internally created
• get_config.cpp is fully generated in cmake, by reflecting config.hpp + https://gitlab.syncad.com/hive/hive/-/merge_requests/192
• change database_api.is_known_transaction method signature to match account_history_api.get_transaction
• locking account also clears memo_key (this will clear memo_key for hive.fund)
• python_tests/cli_wallet can now run just one or selected tests matching given substring with --test-filter substring
• added mechanism and macros to allow tests to require concrete assertion
• Add proposal_id to the proposal_pay virtual operation
• reduce block_log locking and add get_block_range api call
• add changed_recovery_account vop after an account recovery is executed
• add new virtual operations useful for financial accounting
• changed method of tests <=> wallet_cli communication
• governance vote expiration is set to 5 days for testnet
• when connecting to peers, always send Hive chain id
• simplify fc logging syntax

Miscellaneous code and documentation cleanup

• support compilation under Ubuntu 20.04 LTS, tested with boost 1.71 and boost 1.65
• gcc-10 compiler fixes
• remove deprecated LOW_MEMORY_NODE and CLEAR_VOTES settings
• remove deprecated STORE_COMMENT_CONTENT setting
• remove deprecated MIRA support
• remove redundant -std compiler options from cmake, refactor to one location
• If '--force-replay' flag is used, then --replay-blockchain flag is implied
• encapsulate state object members
• add new group of replay-based tests. snapshot and vops tests
• sps_remove_threshold renamed to current_remove_threshold and placed in dgpo
• removed condenser_api::api_comment_object and condenser_api::discussion datatypes
• Minor improvements to docs, scripts and configs

The merge to master containing all changes since the last official update is here: https://gitlab.syncad.com/hive/hive/-/merge_requests/262/diffs

Hardfork date set for Oct 6th, 2020.

New command-line options:

• --dump-snapshot snapshot_name
• --load-snapshot snapshot_name
• --snapshot-root-dir directory_for_storing_snapshots (creates directory if it doesn't already exist)
• --exit-after-replay

Node management improvements

• Snapshot dump/load: A node’s state information can be stored to disk, then used to setup a new node, without requiring a time-consuming replay of the blockchain. Snapshots are stored in the snapshot root directory as a subdirectory with the snapshot name supplied when creating the snapshot. By default, the snapshot root directory is a directory called snapshot in the application's data directory.
• Replays can be stopped via Ctrl-C and resumed. To resume an interrupted replay, relaunch hived, and hived will auto-resume the replay if the state's headblock is less than the block_log's headblock.

Performance Improvements

• A full replay currently takes 16-18 hours. Previously this took several days.
• Huge reduction in memory requirements. A fully featured API node now only requires 16GB RAM.
• New virtual operations to supply more information to hivemind and other microservices:

Governance changes

• Hive must be staked for 30 days before it counts towards witness and proposal voting tallies.

Updates to Decentralized Hive Fund

• steem.dao account has been replaced by hive.fund account: https://gitlab.syncad.com/hive/hive/-/issues/25
• Hive in the treasury fund (hive.fund) will automatically be converted over time to Hive-backed Dollars (HBD). https://gitlab.syncad.com/hive/hive/-/merge_requests/97
• The HBD in the decentralized hive fund doesn't count towards the debt ratio https://gitlab.syncad.com/hive/hive/-/merge_requests/97
• Proposals can be updated after creation time using update_proposal operation. Changes include title changes and lowering the proposal payout request. https://gitlab.syncad.com/hive/hive/-/merge_requests/48
• Increased creation fee for long running proposals, the base price (10 HBD) increases by 1 HBD per extra day past 60 days https://gitlab.syncad.com/hive/hive/-/merge_requests/48
• Fixed bug in descending order in DHF API (another regression from when worker proposal code was originally merged in): https://gitlab.syncad.com/hive/hive/-/issues/31
• Restored support for last_id parameter needed for proposal pagination (this was lost when Steemit merged in the original worker proposal code): https://gitlab.syncad.com/hive/hive/-/issues/32
• Proposal votes are summed up and available via API queries before a proposal becomes active (previously this data was only available after the proposal became active): https://gitlab.syncad.com/hive/hive/-/issues/33

Miscellaneous changes

• Airdrop for accounts voted for via proposal system.
• Major rebranding, replace all Steem/SBD references with Hive/HBD
• Updated code to allow for major release version changes (e.g. 0.23.0 → 1.24.0)
• Chain id changed from 0x0000… to 0xBEEABODE…
• Improved validate_invariants to detect any future code changes that might leave the ledger in an inconsistent state.

Long-standing bug fixes

• Fixed bugs in node shutdown (by Ctrl+C) that led to intermittent crashes at shutdown.
• Fixed fc bug unpacking flat sets that resulted in bug when restoring a snapshot.

And much more

See https://gitlab.syncad.com/hive/hive/-/releases for details on minor version releases.