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Release v0.68

MAINNET UPDATE SCHEDULED: DECEMBER 10, 2025
TESTNET UPDATE: NOVEMBER 25, 2025

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Release Highlights

Release v0.68 prepares the Hiero Consensus Node for Dynamic Address Book (DAB) node account ID changes as well as scheduled contract calls on Hiero Consensus Node. These changes are now live on Hedera testnet (Nov 13, 2025) and are scheduled for mainnet on Dec 10, 2025
Dynamic Address Book node account ID updates (HIP-1299) Release v0.68 introduces the consensus-node changes needed for HIP-1299 Dynamic Address Book node account ID updates. Updatable node account IDs: Node operators will be able to change their node’s nodeAccountId without redeploying the network or creating a brand-new node entry, aligning on-chain identity with operational realities (e.g., custody changes, account migration).Developer impact: For dApps, existing HAPI flows remain unchanged; however, infrastructure and tooling should avoid hard-coding node account ID’s, or at a minimum take extra consideration when hard-coding node account IDs as immutable they can now be changed and hard coding them into applications will introduce a failure mode. On testnet, mainnet, and previewnet you may observe some nodes’ nodeAccountId values changing over time as operators and the Council exercise the new capabilities.Generalized Scheduled Contract Calls (HIP-1215) Release v0.68 enables HIP-1215 Generalized Scheduled Contract Calls on the Hiero Consensus Node. Smart contracts can now schedule future contract calls directly through the Hedera Schedule Service system contract, without relying on external bots or separate “follow-up” user transactions.Key Benefits: New IHederaScheduleService.sol entry points, scheduleCall, scheduleCallWithPayer, executeCallOnPayerSignature, deleteSchedule, hasScheduleCapacity. These let contracts create, trigger, cancel and capacity check scheduled calls entirely on chain.Contracts can schedule calls to themselves or other contracts with a chosen expiry and gas limit, optionally designate a different payer.Developer Impact: Existing HAPI transaction types and receipts remain unchanged but smart contract developers now have an onchain method to express time or event driven workflows with their smart contracts using the Hedera Schedule service system contract.For developers and operators, the main impact from release v0.68 is more reliable block/RPC synchronization on testnet; client APIs and semantics remain unchanged. Release v0.68 prepares the network for Dynamic Address Book node account ID changes and enables new methods of leveraging scheduled smart contract calls with the Hedera Schedule Service system contract.

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Build 0.68.2

  • ci: Use mirrornode v0.142.2 in release/0.68 by @rbarker-dev in #22209
  • chore: wait for process termination (#21986) by @poulok in #22217
Full Changelog: v0.68.1…v0.68.2

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Build 0.68.1

  • feat: Cherry-pick (v68): Use streaming merkle trees for block proof hashes by @mhess-swl in #21994
  • chore: (Cherry-pick) Add executed_hook_id to EvmTransactionResult by @Neeharika-Sompalli in #22017
  • chore: cherry-pick PR #22019 (changing block item overhead to 5 bytes) by @timfn-hg in #22038
  • fix: Always clear state when exiting RPC sync protocol (#22081) by @abies in #22089
  • fix: BlockBufferService forceful BN Switch (#21803) by @derektriley in #21998
  • ci(bug-fix): Get the tag for the release labeled latest (#22157) by @rbarker-dev in #22163
  • fix: cherry-pick Block merkle tree optimizations by @derektriley in #22162
  • fix: Re-enable gas throttle; disable ops duration throttle by @lukelee-sl in #22164
Full Changelog: v0.68.0…v0.68.1

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Build 0.68.0

  • ci: Update SDPT and SDLT workflow to only tag when build ID is present by @andrewb1269hg in #20984
  • fix: Add scheduling.maxExpirySecsToCheckPerUserTxn by @tinker-michaelj in #20987
  • chore: Update incident_types by @rbarker-dev in #21055
  • chore: replace input.ref with github.ref in single day controllers by @andrewb1269hg in #20988
  • chore: Minor Version Roll to 0.67.0-SNAPSHOT by @andrewb1269hg in #21072
  • feat: 17002: A concept of default MerkleDb instance seems redundant by @artemananiev in #19700
  • chore: state validator rehash is too slow by @OlegMazurov in #21013
  • chore(20698): Invert PlatformWiring and PlatformCoordinator relationship by @mxtartaglia-sl in #20758
  • ci: Automatically generate the GH release by @rbarker-dev in #20970
  • chore: Rework block node communication metrics by @timfn-hg in #20885
Full Changelog: v0.66.0…v0.68.0

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Release v0.67

MAINNET UPDATE: NOVEMBER 12, 2025
TESTNET UPDATE: OCTOBER 29, 2025

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Release Highlights

Release v0.67 enhances the stability and performance of the Hiero Consensus Node and updates. Continued progress was made on HIP-1081 Block Nodes, adding features to improve connectivity and metrics.
Updates:
  • Improved Block Streaming Metrics: Metrics for communication between consensus and block nodes have been reworked for clarity and utility. Metric names no longer include the self-node ID, as this is now automatically added as a label
  • Block Streaming Service Lifecycle: The startup and shutdown procedures for the BlockBufferService and BlockNodeConnectionManager have been improved to ensure more reliable initialization and termination.
  • Enhanced Testing and CI: A large effort was invested in improving the test infrastructure, including adding test container support for block nodes, increasing test coverage for block node communication, and parallelizing test suite runs to accelerate the development cycle.
  • Besu Upgrade: Upgraded Besu EVM to 25.2.2. The update introduces Besu Native Libraries Verification, which ensures that required native libraries are available on the host operating system. When these libraries are missing, Besu falls back to non-native implementations, which can reduce performance. This verification helps maintain optimal execution efficiency and consistency across nodes.
Summary:Steady strides were also made in Block Node stability and manageability, including optimizations for error handling, and operational monitoring. The new Besu upgrade brings EVM to v.25.2.2 with Besu Native Libraries Verification enhancements.For developers, no breaking changes or immediate actions required. Existing contracts and integrations remain fully compatible.

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Build 0.67.2

  • feat: Block Node communication cherry-picks by @derektriley in #21742
  • fix(bug): (cherry-pick) Fix typo in GitHub release step (#21563) by @andrewb1269hg in #21760
  • fix: Disable RPC sync by @abies in #21841
  • fix: Re-enable gas throttle; disable ops duration throttle by @lukasz-hashgraph in #21845
Full Changelog: v0.67.1…v0.67.2

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Build 0.67.1

Full Changelog: v0.67.0…v0.67.1

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Build 0.67.0

Full Changelog: v0.66.0…v0.67.0

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Release v0.66

MAINNET UPDATE: OCTOBER 9, 2025
TESTNET UPDATE: SEPTEMBER 25, 2025

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Release Highlights

With the introduction of batch transactions, Release v0.66 marks a key milestone in enhancing flexibility and certainty when executing complex use cases.

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Batch Transaction Processing (HIP-551)

Historically, Hiero developers have been limited to submitting and processing transactions individually. To create complex flows developers relied on smart contracts to execute the series of transactions and mirror node queries to monitor the status of submitted transactions, leading to increased latency, added code complexity, and greater risk of partial failures or errors.Release v0.66 introduces HIP-551 - Batch Transactions, allowing multiple transactions to be bundled and submitted as a single unit that guarantees ACID properties (atomicity, consistency, isolation, and durability). The network handles the batch atomically, ensuring consistent execution while providing granular receipts for each inner transaction. This new feature unlocks capabilities like streamlined dApp interactions, atomic multi-step operations, and consolidation of multiple transactions into one HAPI call.Key benefits:
  • Efficiency Gains: Increases efficiency by processing multiple transactions in one submission, ideal for high-volume applications like DeFi or NFTs.
  • Developer Flexibility: Enables new use cases, such as batch token minting or multi-account updates, without requiring smart contracts.
  • User Experience Improvements: Simplifies interactions for end-users, e.g., executing a series of approvals and transfers in a single step.
To support this, no major client code changes are needed for basic usage, but developers should update to SDKs that support this feature.SDK Versions Supporting Batch TransactionsBelow are the versions of SDKs that support batch transactions:
SDKVersion
Javav2.55.0+
JavaScriptv2.64.0+
Gov2.61.0+
Rustv0.39.0+
C++v0.40.0+
NOTE: Batches may fail partially if inner transactions violate rules; always check individual receipts. For full details on batch structure and rules, see HIP-551.

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Advancements in Block Node Communication

The development of Block Nodes (HIP-1081) continues with this release, with the following development being done:State Export Tools: New commands and improvements for exporting states (Issue: #20622). This is a part of enabling block nodes to improve state snapshotting.Block Node Communication: Enhancements to the communication protocol between consensus nodes and block nodes. Provides better recovery and shutdown procedures to minimize downtime during events like freezes. (Issues: #20858, #20874)\

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Build 0.66.0

Full Changelog: v0.65.1…v0.66.0

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Performance Results

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Release v0.65

MAINNET UPDATE: SEPTEMBER 24, 2025
TESTNET UPDATE: SEPTEMBER 4, 2025

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Release Highlights

Release v0.65 highlights include Virtual Mega Map, enforcement of max_custom_fees for HIP-991 scheduled transactions, and Block Stream improvements including forward-compatibility and unified transaction records. Together, these changes introduce powerful new state management capabilities, scheduled transaction fee controls, and continued advancements toward production-ready Block Streams.

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Virtual Mega Map

The Virtual Mega Map enhances Hedera’s internal state data structure by consolidating all entities—including singletons, queues, and maps—into a single virtual map. This ensures the entire state rolls up to one root hash.Key benefit:
  • Enhanced Verifiability: A unified root hash simplifies state and block item proofs, used for block streams.

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HIP-991 Enhancements: max_custom_fees for Scheduled Transactions

Release v0.65 adds support for max_custom_fees in scheduled transactions with HIP-991 topics.Key benefits:
  • Predictable Fees: Ensures maximum custom fee limits are enforced.
  • Alignment with HTS: Extends scheduled transaction functionality to better match Hedera Token Service features.
  • Developer Guardrails: Protects applications and users from unexpected fee outcomes.

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Advancements in HIP-1056 & HIP-1127: Block Streams

Building on the Block Stream work from v0.64, this release delivers major steps toward a unified, verifiable stream layer.New developments:HIP-1127: Unified Transaction Record in Block Stream: Addresses historical duplication in how transactions are represented and creates a single, unified standard for the block stream. It achieves this while ensuring complete backward compatibility for existing applications, requiring no code changes for developers submitting transactions.Key benefits:
  • Performance & Scalability: Improves throughput and reduces latency when handling accounts, tokens, and other stateful data.
  • Future-Proofing: Provides a foundation for ongoing state service optimization.
  • Reduces State: Reduces the size and cost of the data stream

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Build 0.65.1

Full Changelog: v0.65.0…v0.65.1

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Build 0.65.0

Full Changelog: v0.64.2…v0.65.0

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Performance Results

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Release v0.64

MAINNET UPDATE: AUGUST 20, 2025
TESTNET UPDATE: AUGUST 7, 2025

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Release Highlights

Release v0.64 significantly improves the developer experience for frontend applications by introducing dynamic gRPC-Web endpoint discovery. This simplifies development workflows, enhances scalability, and sets the stage for a more decentralized and robust Hedera network. Additionally, this release includes important important block stream feature development, bug fixes, optimizations, and dependency updates that contribute to the overall stability and performance of the Hiero Consensus Node.

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HIP-1046: gRPC-Web Proxy Endpoint Support To the Address Book

Historically, connecting frontend applications to Hedera using the JavaScript SDK has been challenging due to browser security restrictions. gRPC-Web was used as a workaround, but the necessary endpoints were hardcoded into the SDK. This approach required manual updates and coordination, which could become problematic as Hedera grows and more independent nodes operate.To address this issue, release v0.64.0 introduces dynamic endpoint discovery for gRPC-Web, as described in HIP-1046. The Hedera address book now includes gRPC-Web endpoint information, which the JavaScript SDK uses dynamically. This eliminates the need for hardcoded endpoints and simplifies connecting frontend applications to the Hedera network, even as endpoints change.Key benefits:
  • Simplified Development: Eliminates the need for manual SDK updates to reflect endpoint changes.
  • Enhanced Scalability: Supports the growing number of nodes on the Hedera network.
  • Improved User Experience: Provides a more seamless and robust connection experience for frontend applications.
Client code impact:
  • Update to the latest Hedera JavaScript SDK to leverage this feature. The SDK will now automatically retrieve gRPC-Web endpoints from the address book.
  • Applications or tools that manually maintained lists of gRPC-Web endpoints should now query the mirror node for the latest list.

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Advancements in HIP-1056: Block Streams

Version 0.64 introduces substantial progress on HIP-1056, which aims to create Block Streams—a unified, verifiable data stream that combines Hedera’s existing event, record, and sidecar streams into a single efficient output. These enhancements focus on making Block Streams production-ready by prioritizing efficiency, cost-effectiveness, and security.Key developments in this release include:
  • Stream Size Optimization: The block stream has been refined to minimize its size, reducing storage and transmission costs while maintaining high performance and scalability. This release represents a partial update, with more enhancements to follow.
  • Batch Transaction Support: Added functionality to include batch transactions into the block stream.
  • Consensus Node-to-Block Node Communication: Established secure and reliable communication channels between consensus nodes and block nodes including features like acknowledgments and resend mechanisms. This release represents a partial update, with more enhancements to follow.

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Other updates:

In addition to the aforementioned features, release 0.64 introduces other updates:
  • Added TCK tests to the continuous integration pipeline ( #18727 ) to improve testing coverage and software quality.
  • Disallowed setting duplicate rosters ( #19072 ) to optimize storage and CPU usage.
  • Several dependency updates ( #18714, #18841, #19074 ) to leverage the latest improvements and security patches.

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Build 0.64.2

Full Changelog: v0.64.1…v0.64.2

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Build 0.64.1

Full Changelog: v0.64.0…v0.64.1

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Build 0.64.0

Features
  • Make worker loop sleep duration configurable (#20007)
  • Add transaction support for the container environment (#19941)
  • end the stream if block node is too far behind (#19434)
  • replace hashmap with an array to improve performace for ops duration lookups (#19836)
  • Apply EIP-3529 refund limits (#19769) (#19821)

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Bug Fixes

  • remove workflow dispatch inputs when calling integration workflow (#20046)
  • 18458 Pces file writer rollback (#20038)
  • false positive tests used ‘numeric contract complex’ from numeric validation test (#19954) (#20037)
  • resolve issues with the integration trigger workflow (#20026)
  • Restore missing deps, META-INF files (#20031)
Full changelog can be found in the repo.

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Performance Results

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Release v0.63

MAINNET UPDATE: JULY 23, 2025
TESTNET UPDATE: JULY 10, 2025

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Release Highlights

Release v0.63 introduces three focused improvements: birth-round based ancient event handling, low overhead SDK usage metrics, and full support for non-zero realm IDs.
Birth-Round MigrationToday ancient event pruning correlates with clock time rather than specifically from consensus rounds causing overhead during node updates. In this release birth-rounds are based on consensus time which causes more consistent pruning and smoother node joins, exits, and upgrades.SDK Usage Metrics & gRPC Call insightsRelease .63 introduces a gRPC interceptor that aggregates methods into gRPC_usage metrics every 15m. This will give node and network operators granular visibility with minimal overhead.Non-Zero Realm SupportShard and realm default values on Hiero have previously assumed 0 values, sometimes with hardcoded logic limiting our ability to test future multi value shard and realm network implementations. All APIs and services now accept arbitrary shard and realm IDs. Moving forward we can consistently test future network upgrades in a way that validates non zero realm and shard network configurations.

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Summary

Release 0.63 aligns ancient event handling with consensus time, adds actionable higher resolution SDK telemetry, and removes limitations to implementing non zero realm and shard value tests. This improves Hiero network operational robustness, and expands test configurations.

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Build 0.63.9

Full Changelog: v0.63.7…v0.63.9

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Build 0.63.7

Full Changelog: v0.63.6…v0.63.7

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Build 0.63.6

Full Changelog: v0.63.5…v0.63.6

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Build 0.63.0

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Features

  • remove shard/realm negative check in asTokenId (#19355)
  • 8841: Need a way to change the number of object key buckets in MerkleDb (#18910)
  • Support nonzero shard/realm in yahcli sys commands (#19297)
  • remove genesis freeze time (#19298)
  • Bump PBJ version and use Block Stream Publish Service (#19290)
  • overwrite default config converters (#18617)
  • Support nonzero shard/realm in fee and schedule commands (#19279)
  • add throttle for ops duration (#19053)
  • UnitTest of BirthRound Ancient Mode (#11560) (#19252)
  • Support accepting/declining rewards in yahcli DAB transactions (#19255)
  • Add ops duration (#18921)
  • limit birth round when freezing (#19193)
  • Enable Birth Rounds as Ancient Threshold (#19208)
  • Implement nonzero shard/realm for yahcli DAB transactions (#19166)
  • Migrate logging validation to assertThat for OtterTests (#19159)
  • 18458 Guarantee events are written on pces before handling that round (#18811)
  • stop consensus on freeze (#18937)
  • Yahcli nonzero shard/realm implementations for crypto transfers and sys file updates (#19063)
  • Implement feature flag for gRPC web proxy endpoint (#19051)
  • Implement staking activation with nonzero shard/realm (#19010)
  • Implement fee changes for HIP-991 (#18991)
  • add proper handling for unknown function calls in system contracts (#18733)
  • Capture GRPC/SDK usage metrics (#18469)
  • enable the jumbo transaction feature flag (#18969)
  • enhance logging validation for otter tests (#18897)
  • local deterministic generation (#18930)
  • add debug logs on key places (#18890)
  • Limit the callData field instead of ethereumData (#18647)

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Bug Fixes

  • Keep node weights in HintsConstruction (#19344)
  • Improve error handling when setting auto renew period (#19303)
  • 19319: Improve MerkleDb reconnect / compaction synchronization (#19321)
  • 19301 Updated StateIdentifier enum (#19302)
  • 19259 Fix race condition when setting freeze round value (#19299)
  • Fix batch transaction fees (#19101)
  • Correct HapiCryptoCreate staked account ID parsing (#19283)
  • ConcurrentModificationException in InMemoryAppender (#19266)
  • Fix the transactionFee in the record for ConsensusSubmitMessage with custom fees (#19201)
  • Move jumbo transaction size check only at ingest (#19118)
  • Remove default shard and realm constants (#19123)
  • Only use inner results for BATCH_INNER dispatches (#19157)
  • Use CompositeFilter for console logging (#19171)
  • 19162 Open clause for JMS runtime for junit-extensions (#19163)
  • Decouple shard/realm from hapiTestMisc (#19083)
  • Inner transaction node setting in test-clients (#19150)
  • asTokenId can generate TokenId with negative shard and realm (#18997)
  • Fix error in TipsetEventCreatorTests (#19120)
  • Decouple hapiTestSmartContracts shard and realm (#19077)
  • Update to respect 0.2.3-SNAPSHOT max CRS parties (#19106)
  • 19054: Need a way to check if a MerkleDb compaction tasks are running (#19069)
  • Change default decline_reward to true for nodes created during genesis (#19086)
  • NoArgsConstructor has duplicated get() method (#19089)
  • Decouple hapiTestToken (#18985)
  • Update Roster Schema isUpgrade check (#19006)
  • add required module to Otter tests test fixtures module info (#19024)
  • Flaky Jumbo transactions tests (#19015)
  • Improve exception handling when payer account is not meeting the specifications (#18995)
  • migrate judge hashes on birth rounds (#19000)
  • Assign nGen for GUI generated events (#18986)

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Performance Results

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Release v0.62

MAINNET UPDATE: JUNE 25, 2025
TESTNET UPDATE: JUNE 3, 2025

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Release Highlights

Release 0.62 delivers substantial improvements in Ethereum compatibility, continuing Hedera’s commitment to providing a seamless and cost-effective experience for developers and ecosystem participants building with Ethereum tools and infrastructure. In addition, this release updates the HIP-991 SubmitMessage fees and lays the groundwork for block streams. What’s new in Release 0.62?

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Jumbo Ethereum Transaction Support (HIP-1086)

Historically, the Hedera API (HAPI) transaction size has been limited to 6 KB. Many Ethereum smart contracts and certain Ethereum contract calls exceed this limit. To work around this, developers previously had to utilize Hedera’s file service to upload larger contracts or call data in multiple 6 KB chunks — a process that added complexity, cost, and latency. Release 0.62 eliminates this friction by supporting a significantly larger transaction size of almost 128 KB for smart contract transactions, thereby simplifying EVM developer workflows and improving performance. Key benefits:
  • Simplified development: Eliminates the need to write and maintain custom code to handle 6 KB chunking.
  • Reduced cost and latency: Streamlines common operations such as ContractCreate, ContractCall, and EthereumTransaction.
  • Improved cost efficiency for JSON-RPC relays: Lowers operational costs for relay providers.
  • Enhanced Ethereum compatibility: Brings the experience of creating and calling smart contracts on Hedera closer to native Ethereum workflows.
To support this capability, the release also introduces a reworked throttling system that protects against potential denial-of-service (DoS) attacks while maintaining fairness across transaction sizes.

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Zero-Cost EthereumTransaction on Success (HIP-1084)

A frequently reported pain point from JSON-RPC relay operators has been the cost of submitting wrapper EthereumTransactions. While gas costs for contract execution are typically borne by the calling entity (EOA or contract), relay operators have been required to fund the HBAR-based transaction fee — resulting in reduced adoption and ecosystem participation. Release 0.62 addresses this by eliminating the cover charge for EthereumTransactions where the inner call completes and pays for the gas consumed.

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Key benefits:

  • Simplified relay operation: Removes the need for relay operators or embedded relays in dApps to maintain funded HBAR accounts for successful calls.
  • Enhanced Ethereum compatibility: Further enhances Hedera’s Ethereum compatibility by charging all costs in gas alone.
  • Better ecosystem support: Encourages greater participation by third-party relay operators and dApp developers.
To maintain network security, malformed, underfunded, or invalid contract calls that fail to cover gas fees through regular mechanisms will still be charged a fee in order to prevent abuse.

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Other updates:

In addition to the aforementioned features that improve Ethereum compatibility, Release 0.62 introduces two other updates:
  • SubmitMessage API calls for an HCS topic with Custom Fees (HIP-991) have been updated to $0.05 for the Hedera network.
  • Foundational improvements in block stream management and handling workflows that will enable future features in block streaming capabilities and performance in upcoming releases.

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Summary:

Release 0.62 represents an important milestone toward making Hedera a highly competitive platform for Ethereum-compatible applications, completes the implementation of HIP-991, and sets up the foundation for streaming the network blocks and state information.

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Build 0.62.6

Full Changelog: v0.62.5…v0.62.6

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Build 0.62.5

  • chore: Remove the migration code for setting declineReward=true for all nodes on upgrade (#19338)

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Build 0.62.4

Full Changelog: v0.62.3…v0.62.4

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Build 0.62.3

Full Changelog: v0.62.2…v0.62.3

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Build 0.62.2

Full Changelog: v0.62.1…v0.62.2

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Build 0.62.1

Full Changelog: v0.62.0…v0.62.1

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Build 0.62.0

Features
  • remove code deposit gas charge waiver (#18797)
  • decouple backend throttle config from front end and add support for burst (#18743)
  • Update consensus to use nGen for determining when to recalculate metadata (#18882)
  • add cGen (#18867)
  • HIP-1046 Extend node address book with gRPC web proxy endpoint (#18766)
  • EventCreator uses nGen instead of generation (#18737)
  • Otter test logging improvements (#18850)
  • Add new v0.62 module and HederaEVM class (#18535)
  • Modifications to EventHeader for Block Stream (#18548)
  • Add otter test module (#18646)
  • handle ResendBlock block node responses (#18747)
  • Handle BlockAcknowledgements received from Block Nodes (#18536)
  • 18593: Need a mechanism to repair key to path mapping from data files at startup (#18625)
  • Jumbo bytes throttle (#18389)
  • Use existing key to create an account (#18611)
  • Remove use of generation from sync (#18590)
  • move parent event descriptors (#18524)
  • Long Term Schedule Transaction Support For DAB transactions (#18539)
  • Implement Non-deterministic Generation (#18506)
  • Stream to Block Node’s immediately without waiting BlockProofs (#18450)
  • Enhance yahcli rekey with ECDSA support (#18515)
  • Implement daily node rewards (#18441)
  • add HAPI verb to override the hederaFunctionality (#18481)
  • Increase the buffer size of ethereumCall gRPC endpoint (#18321)
  • Add ingest workflow jumbo checks (#18312)
  • try using non-zero realm/shard (#18092)
Bug Fixes
  • 18903: Tighten HDHM repair checks (#18906)
  • detach FCQueue copy when serializing (#18863)
  • Fix failing test in crypto-base (#18888)
  • fix copy paste error in TipsetEventCreatorTests (#18876)
  • disable GasCalculationIntegrityTest test suite (#18868)
  • 18844: HDHM repair mechanism should not be enabled for snapshots (#18859)
  • 18856: ReconnectHashLeafFlusher uses a wrong config (#18857)
  • NPE in HalfDiskHashMap (#18854)
  • Remove unused injections and fix tests (#18651)
  • Fix transactionFee in batch transactions (#18835)
  • Correctly populate sysfiles with node info (#18834)
  • Revalidate collector token association on transfer (#18674)
  • Fix the NPE in DefaultIssDetector.handleCatastrophic (#18830)
  • flaky completedHollowAccountOperationsFuzzing test (#18816)
  • Fix flakiness in HIP-1064 tests (#18822)
  • 18813: VirtualMapLargeReconnectTest.multipleAbortedReconnectsCanSucceed is unstable (#18814)
  • Use getIfUsable() in ApproveAllowanceValidator (#18580)
  • add auto-renew check for negative values (#18765)
  • 18795: HDHM repair mechanism can be improved to clean stale buckets (#18796)
  • Only allow creation of accounts that match the configured shard/realm (#18806)
  • Move sort before filterLikelyDuplicates (#18802)
  • adding validation for deleted token on unpause (#18671)
  • Update flow-pull-request-formatting.yaml (#18790)
  • 18658: ReconnectNodeRemover.setPathInformation() may cause OOM (#18708)
  • Remove mono logic returning the wrong response code (#18698)
  • 1280 hip 1056 block item with failed contract create result contains a contract (#18728)
  • Improved error handling for airdrops with multiple senders (#18604)
  • Use getIfUsable() when validate custom fees (#18576)
  • Fix TokenCreateTransaction TCK issues (#18577)
  • Add guard around LATEST_XTS_PASS_TAG (#18687)
  • Also archive config.txt as part of network archiving process (#18427)
  • Add back sorting of sync events (#18657)
  • memory leak in HalfDiskHashMap.endWriting() (#18659)
  • Call endRound after dispatch (#18620)
  • Only “go back” in cons time for post-restart system work (#18654)
  • 18561 Threads outlive the SequentialTaskScheduler created during test (#18391)
  • airdrop TCK issues fixes (#18582)
  • 18571: Current path range should be respected when path to hash and path to KV indices are restored (#18592)
  • contract get bytecode query to return the redirect code for hts token addresses (#18464) (#18563)
  • Fix flaky PcesFile tests (#18474)
  • Utilize more than one thread for SSL accept handling (#18557)
  • Ensure BlockStreamManager#endRound() is called after dispatching system txns (#18554)
  • 17180 EventCreator ignores HealthMonitor update when squelching enabled (#18387)
  • Import sentinel key from hapi utils (#18512)
  • compile fix (#18510)
  • Should reject a FILE_UPDATE to 0.0.123 with an invalid throttle definition (#18417)
  • 18410: Bucket integrity check in HDHM.ReadUpdateBucketTask can be improved (#18411)
  • HIP-1028 cleanup and versioning for GetTokenKey (#18304)
  • update reference to unhex method (#18470)

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Performance Results

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Release v0.61

MAINNET UPDATE: MAY 30, 2025
TESTNET UPDATE: MAY 20, 2025

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Release Highlights

This release focuses on enhancing network incentivization and improving overall system robustness and developer experience.

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Hiero Improvement Proposals (HIPs)

  • Daily rewards for active nodes HIP-1064: Full implementation of a daily reward mechanism for active consensus nodes, including an option for node operators to decline these rewards. This enhances network health by incentivizing consistent node uptime and participation, while providing operators flexibility in managing their rewards and improving network decentralization. Please note this feature will be disabled until a July 1, 2025 launch date.
  • HIP-551 (Atomic Batch Transactions): HIP-551 This release includes the implementation of Atomic Batch Transactions; however, due to technical challenges identified in testing, this feature has been temporarily disabled. As a result, users attempting to submit Atomic Batch Transactions will receive a status code of BUSY from the network. We are actively working to resolve these issues and plan to enable this feature in a future update.

​
New Features

  • Node Reward Opt-Out (HIP-1064): Node operators can now decline daily node rewards using a new decline_reward boolean flag in NodeCreateTransactionBody and NodeUpdateTransactionBody. This offers greater control and flexibility for node operators based on their specific requirements. The default value for this flag will be set to true to decline rewards by default. 
    • // Example: Opting out of node rewards during node creation
NodeCreateTransactionBody createBody = NodeCreateTransactionBody.newBuilder()
    // ... other fields like accountID, description, etc.
    .setDeclineReward(true) // Set to true to decline node rewards
    .build();

​
Notable Bug Fixes

  • #17478: Corrected Cancun SELFDESTRUCT Semantics: Fixed incorrect SELFDESTRUCT behavior per EIP-6780 post-Cancun, where a contract specifying itself as the beneficiary in a non-creation transaction erroneously triggered a SELF_DESTRUCT_TO_SELF error. The fix ensures compliance with EIP-6780, allowing the operation to proceed without deleting the contract or transferring its balance, including native tokens. Additionally, refactored CustomSelfDestructOperation.execute to streamline validation checks before state changes. Impact: Enhances EVM compatibility and reliability on Hedera for contracts using SELFDESTRUCT, ensuring correct execution under post-Cancun rules.

​
Build 0.61.10

  • chore: (cherry-pick to tag 0.61.10) Disable the defaults for contracts.evm.ethTransaction.zeroHapiFees.enabled and nodes.nodeRewardsEnabled by @Neeharika-Sompalli in #19521
Full Changelog: v0.61.9…v0.61.10

​
Build 0.61.9

Full Changelog: v0.61.8…v0.61.9

​
Build 0.61.8

Full Changelog: v0.61.7…v0.61.8

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Build 0.61.7

Full Changelog: v0.61.6…v0.61.7

​
Build 0.61.6

Full Changelog: v0.61.5…v0.61.6

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Build 0.61.5

Full Changelog: v0.61.4…v0.61.5

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Build 0.61.4

  • fix: 0.61 cherry-pick: Correctly populate sysfiles with node info by @mhess-swl in #18884
  • fix: 18771: Backport fixes for 18593, 18795, 18844, and 18903 to release 0.61 by @artemananiev in #18799
  • chore: (0.61) add fee refund mechanism, use for successful EthereumTransaction by @tinker-michaelj in #18913
Full Changelog: v0.61.3…v0.61.4

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Build 0.61.3

Full Changelog: v0.61.2…v0.61.3

​
Build 0.61.2

Full Changelog: v0.61.1…v0.61.2

​
Build 0.61.1

​
What’s Changed

Full Changelog: v0.61.0…v0.61.1

​
Build 0.61.0

Features
  • Dynamic peers for the sync network (#18051)
  • Add JumboTransactionsConfig (#18277)
  • implement exponential backoff for connections to Block Nodes (#18055)
  • HIP-1028 Fungible and NFT Token Info versioning (#18013)
  • add SCHEDULE_EXPIRY_NOT_CONFIGURABLE validation (#18239)
  • Add messages for skip and resend block to block service (#18133)
  • Create a HAPI test to validate birth round migration (#18005)
  • Close blocks during fatal ISS (#17942)
  • HIP-1028 apply versioning to Update Token and Update Token Keys System Contracts (#17994)
  • Add feature flag for CRS (#18073)
  • change version to 0.61 (#18088)
  • Support non-zero realms for contracts service (#18010)
  • HIP-551 atomic batch transactions (#17333)
Bug Fixes
  • Detect ISSes when states are not produced for every round (#18399)
  • remove @OrderedInIsolation from contract bdd tests (#18400)
  • HIP-632 fix alias length check (#18385)
  • Extended suite failure during insertRemoveAndModifyOneMillion (#18407)
  • 18393 metrics not updated in PlatformWiring (#18394)
  • Fix candidate roster adoption logic (v61) (#18372)

​
Performance Results

​
Release v0.60

MAINNET UPDATE: APRIL 16, 2025
TESTNET UPDATE: April 9, 2025

​
Release Highlights

This release focuses on significant performance improvements, enhanced developer tooling, and improved error handling.

​
Hiero Improvement Proposals (HIPs)

HIP-1021: Improve Assignment of Auto-Renew Account ID for Topics
  • Full implementation of improved auto-renew account ID assignment for topics, enabling setting autoRenewAccountId during topic creation without an admin key.
  • Developers benefit from simplified topic management and reduced risk of unexpected expirations.

​
Build 0.60.1

Full Changelog: v0.60.0…v0.60.1

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Build 0.60.0

Full Changelog: v0.59.5…v0.60.0

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Performance Results

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Release v0.59

MAINNET UPDATE: MARCH 26, 2025
TESTNET UPDATE: MARCH 18, 2025

​
Release Highlights

​
HIPs:

​
HIP-991: Topic Fees

  • Description: ​HIP-991 introduces an optional fee system for submitting messages to topics on the Hedera network, aiming to enhance economic scalability and simplify operations for topic operators.
  • Benefits: Empowers topic operators with greater control over their topics, offering mechanisms to monetize and manage access. Key features include:
    • Optional Submission Fees: Topic operators can set optional fees for message submissions, payable in HBAR or Hedera Token Service (HTS) fungible tokens.​
    • Fee Schedule Key: A new ‘Fee Schedule Key’ allows operators to manage and update fee structures. This key must be set during topic creation.​
    • Custom Fee Distribution: Collected fees can be distributed to multiple accounts, supporting both HBAR and HTS tokens.​
    • Fee Exemptions: Operators can specify a list of keys that are exempt from fees, allowing certain users to submit messages without incurring charges.​

​
HIP-755: Schedule Service System Contract signSchedule(address, bytes)

  • Description: This HIP introduces a Schedule Service System Contract to enhance the Hedera Smart Contract Service (HSCS) by enabling smart contracts to interact with scheduled transactions. This release includes signSchedule(address, bytes).
  • Benefits: HIP-755 introduces a Schedule Service System Contract to enhance the Hedera Smart Contract Service by enabling smart contracts to interact with scheduled transactions. signSchedule(address, bytes) method, allows smart contracts to pass along the signature from an EOA needed for a scheduled transaction.

​
HIP-756: Scheduled Token Create/Update Transactions via Smart Contract

  • Description: Enables scheduling token create and update operations through smart contracts, with implementation of the scheduleNative system contract function.
  • Benefits: Expands smart contract functionality by allowing developers to schedule token operations directly from smart contracts, providing more flexibility in DApp development.

​
Build 0.59.5

  • fix: Fix candidate roster adoption logic (v59) by @poulok in #18359
Full Changelog: v0.59.4…v0.59.5

​
Build 0.59.4

Full Changelog: v0.59.3…v0.59.4

​
Build 0.59.3

Full Changelog: v0.59.2…v0.59.3

​
Build 0.59.2

Full Changelog: v0.59.1…v0.59.2

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Build 0.59.0

  • refactor: 16436 Removed MerkleRoot interface. by @imalygin in #17130
  • fix: move and change value of Dockerfile environment variable by @matteriben in #16239
  • build: Roll hiero gradle conventions to version 0.1.4 by @andrewb1269hg in #17149
  • build(deps): bump actions/setup-java from 4.5.0 to 4.6.0 by @dependabot in #17113
  • build(deps): bump gradle/actions from 4.2.1 to 4.2.2 by @dependabot in #17111
  • chore: Update hedera-services to rename develop as main by @rbarker-dev in #17091
  • chore: Update workrflow names to point to main instead of develop by @rbarker-dev in #17158
  • ci: Update Check Integration/XTS Job State to include GH_TOKEN by @rbarker-dev in #17160
  • ci: add id_token write permission to node-flow-deploy-release-artifact.yaml by @rbarker-dev in #17161
  • feat: Support overwrites for interface bindings and endpoints by @timo0 in #17117
  • chore: Refactor hapi tests to use hapiTest(...) instead of defaultHapiSpec(...) (Part 3) by @mhess-swl in #16698
  • feat: consolidate hbar transfer list when decoding cryptoTransfer function by @lukelee-sl in #17165
Full Changelog: v0.58.9…v0.59.0

​
Release v0.58

MAINNET UPDATE: MARCH 12, 2025
TESTNET UPDATE: FEBRUARY 11, 2025

​
Release Highlights

This release introduces several new features, improvements, and bug fixes, including:

​
HIPs

  • HIP-423 Long-Term Scheduled Transactions: Update to ScheduleSign throttles changed: The ScheduleSign transaction is now throttled like other transactions and can now be managed by the default throttling mechanism on the network. (#16958, #16959) This completes HIP-423.
  • HIP-755 authorizeSchedule(address)
    Adds functionality to the Hedera Schedule Service System contract so that a smart contract can sign a referenced scheduled transaction using its contract key, enabling automated execution of scheduled transactions directly from smart contracts. (#16983), the remaining outstanding features to complete HIP-755 will be provisioned in release .59.

​
Other Notable Changes

  • Enabled mirror node to simulate contract calls: The standalone transaction executor now supports custom Operations. Developers can use this feature to create and execute custom operations that are not part of the standard Hedera API. (#17354)
  • Enhancing Dynamic Address Book v2 NodeCreate and NodeDelete transaction signature requirements changed:
    • The NodeCreate transaction now requires the admin key and one of the treasury account key, system admin key, or address book admin key to sign.
      • The NodeDelete transaction is now a non-privileged transaction and requires one of the admin key, treasury account key, system admin key, or address book admin key to sign. (#16900, #17021, #16990, #17029)
  • Ensuring state changes are now in block streams: Refactored out-of-band state modifications: All out-of-band state modifications have been refactored to be done in Schemas. (#16843)
  • Increased CryptoGetAccountBalance throttle: The throttle for the CryptoGetAccountBalance query has been increased to the number of network nodes times 1,000,000 plus a buffer. This change addresses an issue where the throttle was too low, leading to throttling errors. (#16850, #16857)

​
Build 0.58.13

  • Fail NFT airdrops that would trigger royalty fee payments.
Full Changelog: v0.58.11…v0.58.13

​
Build 0.58.11

  • Add safety checks before Besu secp256k1 native library invocations (c.f. here.
  • Ignore approval flag when de-duplicating account ids in a TokenTransferList.
Full Changelog: v0.58.10…v0.58.11

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Build 0.58.10

Full Changelog: v0.58.9…v0.58.10

​
Build 0.58.9

Full Changelog: v0.58.7…v0.58.9

​
Build 0.58.8

Re-tag of v0.58.7 to trigger workflowull Changelog: v0.58.6…v0.58.7

​
Build 0.58.7

Full Changelog: v0.58.6…v0.58.7

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Build 0.58.6

  • chore: Reapply “FileService address book and node details” by @mhess-swl in #17543
Full Changelog: v0.58.5…v0.58.6

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Build 0.58.5

Full Changelog: v0.58.3…v0.58.5

​
Build 0.58.3

  • feat: cherry-pick: Generated Files 101 & 102 Sequentially Ordered by Node ID by @iwsimon in #17289
Full Changelog: v0.58.2…v0.58.3

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Build 0.58.0

New ContributorsFull Changelog: v0.57.3…v0.58.0

​
Release v0.57

MAINNET UPDATE: JANUARY 28, 2025
TESTNET UPDATE: JANUARY 8, 2025

​
Release Highlights

This release introduces several new features, improvements, and bug fixes, including:

​
HIPs

  • HIP-423: Long-Term Scheduled Transactions: This release completes the implementation of HIP-423, enabling schedules to execute transactions at a future date and time. This provides developers with a powerful tool for automating on-chain actions and building time-based applications. Benefits include:
    • Automated Transactions: Schedule transactions to execute automatically at a specific time.
    • Time-Based Applications: Build applications that rely on time-based events, such as recurring payments or token distributions.
    • Enhanced Security: Schedule transactions can be signed by multiple parties, ensuring that they are executed only when all required approvals are obtained.

​
New Features

  • Node Operator Queries: This release introduces a dedicated gRPC port for node operators to perform free queries. This enables node operators to monitor the network and their nodes more efficiently without incurring transaction fees.
  • Proxy Redirect Contract for Schedule Entities: This release adds support for a proxy redirect contract for calls to schedule transactions. This allows EOAs to make function calls in schedule entity addresses, enabling more flexible and dynamic interactions with scheduled transactions.
  • HSS System Contract: This release introduces the Hedera Schedule Service (HSS) system contract, providing a set of functions for managing scheduled transactions, including signing and authorizing schedules.
  • Support for Extra Dispatch Authorizations: The ScheduleSignHandler now supports authorizing Key{contractID=0.0.X} and Key{delegatable_contract_id=0.0.X} keys in a schedule’s signatories list, enabling more granular control over schedule execution.

​
Build 0.57.5

Full Changelog: v0.57.4…v0.57.5

​
Build 0.57.4

Full Changelog: v0.57.3…v0.57.4

​
Build 0.57.3

  • fix: tokenClaimAirdrop throws NPE on null sender or receiver by @kimbor in #17096
Full Changelog: v0.57.2…v0.57.3

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Build 0.57.2

Full Changelog: v0.57.1…v0.57.2

​
Build 0.57.1

Full Changelog: v0.56.7…v0.57.1

​
Performance Results

​
Release v0.56

MAINNET UPDATE: DECEMBER 11, 2024
TESTNET UPDATE: DECEMBER 4, 2024

​
Release Highlights

​
HIPs

HIP-869 Dynamic Address Book—Stage 1: This release includes the implementation of HIP-869, enabling the Dynamic Address Book. Node operators can now update node details and address books via Hedera transactions. This streamlines network operations and enables node operators to manage their associated node entries directly in the Address Book. HIP-904 System Contract Functions: Implements the System Contract Functions section within HIP-904. Introduces Hedera Token Service (HTS) support for the airdrop-related capabilities. These functions are implemented as system contract functions, making it possible for smart contracts to issue Frictionless Airdrops, Token Reject, and AutomaticToken Association configurations for efficient management. HIP-632 - isAuthorized(): The isAuthorized() function introduced in HIP-632 extends the Hedera Account Service (HAS) System Contract, enabling smart contracts to authenticate signatures against Hedera accounts. This provides functionality akin to the validation step following Ethereum’s ECRECOVER, without recovering public keys. It supports ECDSA, ED25519, and complex keys such as threshold keys, though ECDSA is recommended for compatibility and interoperability with Ethereum. This builds on the previous functionality of isAuthorizedRaw() released in 0.52. Other Notable Changes: Block Streams - Dev Access Preview: Block Streams is a new output stream that will replace Hedera’s existing event and record streams into a single stream of verifiable data. This consolidated approach not only simplifies data consumption but also enhances Hedera’s capabilities by including state data. Starting with version 0.56, consensus nodes will publish preview block stream files alongside the existing record stream, which remains the authoritative source of truth for Hedera. This preview allows the community to explore, test, and provide feedback on this new feature, paving the way for its future adoption. Migration from .pfx to .pem Cryptography Files: The consensus node cryptography system was migrated from using .pfx files to more manageable .pem files.

​
Build 0.56.7

  • chore: Cherry-Pick (0.56): Increase CryptoGetAccountBalance throttle by @kimbor in #16852
Full Changelog: v0.56.6…v0.56.7

​
Build 0.56.6

  • chore: Cherry Pick: Modify and mount default block streams output directory by @mhess-swl in #16753
Full Changelog: v0.56.5…v0.56.6

​
Build 0.56.5

  • fix: correct a missing conversion between AddressBook cert hash hex-string-as-bytes and actual SHA2-384 hash bytes for Node entries. by @jsync-swirlds in #16659
  • chore: Do stricter validation of X.509 gossip cert in DAB transactions by @tinker-michaelj in #16666
Full Changelog: v0.56.4…v0.56.5

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Build 0.56.0

New ContributorsFull Changelog: v0.55.1…v0.56.0

​
Performance Results

​
Release v0.55

MAINNET UPDATE SCHEDULED: NOVEMBER 13, 2024
TESTNET UPDATE SCHEDULED: NOVEMBER 5, 2024

​
Release Highlights

​
Notable Change

Throttle for AccountBalanceQuery
  • A new throttle for AccountBalanceQuery requests to manage and optimize query load on the network.

​
Build 0.55.2

  • chore: 16356 cherry pick java version fixes by @rbarkerSL in #16358
  • feat: Cherry-Pick (0.55): Define throttle for GetBalance queries by @vtronkov in #16339
Full Changelog: v0.55.1…v0.55.2

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Build 0.55.1

TESTNET UPDATE SCHEDULED: OCTOBER 29, 2024
  • chore: cherry-pick, do not update file 102 during the first transaction after a freeze upgrade when DAB is disabled by @iwsimon in #16045
Full Changelog: v0.55.0…v0.55.1

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Build 0.55.0

New ContributorsFull Changelog: v0.54.2…v0.55.0

​
Performance Results

​
Release v0.54

MAINNET UPDATE SCHEDULED: OCTOBER 23, 2024
TESTNET UPDATE SCHEDULED: OCTOBER 16, 2024

​
Release Highlights

This release introduces exciting new features and improvements, including HIP-904 for token airdrops, and HIP-1010 for updating custom fee via smart contracts.

​
HIPs

HIP-904: Token Airdrops and Claims Implementation: Partial implementation Delivered in this release:
  • TokenAirdrop transaction is similar to crypto transfers, but differs in one fundamental way - when an airdrop is performed and the receiver does not have available or automatic association slots, rather than failing, the transfer will be kept in state as a pending transfer.
  • TokenClaimAirdrop transaction introduced for recipients to claim pending airdropped tokens.
  • TokenCancelAirdrop transaction introduced giving senders the ability to cancel unclaimed airdrops.
Benefits:
  • Streamlines token distribution, empowers token creators, developers, and projects by allowing them to distribute tokens more efficiently to a wider audience.\
HIP-1010: Update Token Custom Fee Schedules via Smart Contracts Implementation: Full implementation Delivered in this release:
  • updateFungibleTokenCustomFees system contract function for updating custom fees for fungible tokens.
  • updateNonFungibleTokenCustomFees system contract function for updating custom fees for non-fungible tokens.
Benefits:
  • Enables smart contracts to manage token custom fees, providing more dynamic and autonomous token management capabilities.

​
Build 0.54.2

  • fix: Cherry-Pick (0.54): Airdrop transfer list size validation by @mhess-swl in #15937
Full Changelog: v0.54.1…v0.54.2

​
Build 0.54.1

TESTNET UPDATE SCHEDULED: OCTOBER 2, 2024
Full Changelog: v0.54.0…v0.54.1

​
Build 0.54.0

➡ See the full list of changes here.

​
Performance Results

​
Release v0.53

MAINNET UPDATE SCHEDULED: SEPTEMBER 11, 2024
TESTNET UPDATE SCHEDULED: SEPTEMBER 4, 2024
builds.hedera.comBuild version.0 - zip sha384Build version.1 - zip sha384Build version.2 - zip sha384Build version.3 - zip sha384Build version.4 - zip sha384Build version.5 - zip sha384

​
Release Highlights

​
HIP-719: Associate and Dissociate Tokens via Facade Contract

​
Functionality

Delivered in release 0.53
  • isAssociated for token association via proxy facade contract.
    • Syntax
      • <tokenAddress>.isAssociated()
    • Example
      • IHRC719(<tokenAddress>).isAssociated()
Delivered in prior release(0.38)
  • Associate and Dissociate Tokens via proxy facade contract
Benefits
  • Enables developers to call functions in a way familiar to ERC-20 and ERC-721.
  • Token functions are callable by both EOAs and contracts.

​
HIP-904: tokenReject, account infinite maxAutoAssociation & Sender pays auto association

​
Functionality

Partial completion of HIP-904 Delivered in 0.53
  • Sender pays for association
    • Sender now pays for token association at the time of HTS transaction execution.
  • Max_auto_associations
    • Default value for max_auto_assocations will now be -1 meaning that if an account is created automatically by performing a token transfer to an alias that does not yet exist the account is configured with unlimited automatic token association.
    • HAPI:CryptoCreate will continue to have max_auto_associations defaulting to 0.
    • Accounts created before the launch of this feature will remain unchanged.
  • Token reject
    • Introduces TokenReject Transaction.

​
Benefits

  • maxAutoAssociation users can update their account preferences to unlimited association giving the ability to receive any airdrops without explicitly having to associate with that token.
  • Slots are only paid for when used, and are initially paid for by the sender during automatic associations.

​
HIP-850: HTS Mutable metadata in treasury

​
Functionality

  • Entire scope of HIP-850 delivered in release 0.53.
  • Enables the Supply Key to update an NFT metadata field while the NFT is held in the treasury account via TokenUpdateNftsTransaction function for a specific NFT serial number.

​
Benefits

  • NFT owners can return an NFT to treasury custody in order to update parameters within the metadata of the NFT.
  • NFT cannot be updated by unauthorized parties once distributed.

​
HIP-993: Improve record stream legibility and extensibility

​
Functionality

Delivered in release .53:
  • Itemized auto-creation fees
  • Unified child consensus times
  • Clean hollow account completion records
  • Synthetic file creations at genesis
  • Use natural order for preceding dispatch records
Planned for delivery in release .54:
  • Fail fast on throttled child transactions

​
Benefits

  • This HIP refines the legibility and extensibility of the record stream.

​
Build 0.53.5

​
What’s Changed

  • feat: add enableDAB flag to enable and disable DAB features by @iwsimon in #15232
  • ci: resolves release issue preventing the publication of the docker images by @nathanklick in #15158
  • fix: hedera-evm and hedera-evm-impl are overwriting each other in MC by @rbarkerSL in #15175

​
Build 0.53.1

​
What’s changed

​
Build 0.53.0

➡ See the full list of changes here.

​
Performance Results

​
Release v0.52

​
Release Highlights

​
HIP-632 - isAuthorizedRaw

​
Functionality

  • Accepts three parameters:
    • address
    • messageHash
    • signatureBlob
  • Validates the provided address (Hedera Account ID or virtual address)
  • Determines signature type based on signatureBlob length:
    • 65 bytes: ECDSA
    • 64 bytes: ED25519

​
ECDSA Signature Handling

  • Extracts v, r, and s components
  • Runs ECRECOVER to recover signing address
  • Compares result with the account’s virtual addresses

​
ED25519 Signature Handling

  • Retrieves Hedera address
  • Checks for single associated key on account
  • Verifies signature against message hash and account key

​
Benefits

  • Similar functionality to Ethereum’s ECRECOVER precompile
  • Supports both ECDSA and ED25519 signature verification
  • Works with Hedera Account IDs and virtual addresses
  • Simplifies signature verification in smart contracts
  • Streamlines transaction authentication within contracts
  • Enhances Hedera-Ethereum authorization flow compatibility
  • Improves developer experience with familiar authorization mechanism

​
HIP 904

​
TokenRect Functionality

  • Allows users to reject undesired tokens
  • Transfers thefull balance of one or more tokens from the requesting account to the treasury
  • Supports rejection of both fungible and non-fungible tokens
  • Handles up to 10 token rejections in a single transaction
  • Bypasses custom fees and royalties defined for the rejected tokens

​
Benefits of TokenReject

  • Enables users to remove unwanted tokens from their accounts
  • Protects users from potential scams or unwanted airdrops
  • Allows rejection of tokens regardless of how they were acquired (manual or automatic association)
  • Helps users manage their token holdings more effectively
  • Prevents users from being forced to pay exorbitant or potentially malicious fees to remove tokens
  • Maintains account association with the token, allowing for future transactions if desired
  • Provides a simple mechanism for users to clean up their accounts
  • Enhances user control over their token portfolio
  • Improves overall user experience in token management

​
Build 0.52.3

MAINNET UPDATE SCHEDULED: AUGUST 28, 2024

​
What’s Changed

​
Build 0.52.2

TESTNET UPDATE SCHEDULED: AUGUST 14, 2024

​
What’s Changed

  • chore(0.52): updates the buildkit and docker daemon configuration to use the registry mirror by @nathanklick in #14777
  • fix: immediately finalize transfer lists for scheduled crypto transfer by @tinker-michaelj in #14799

​
Build 0.52.1

​
What’s Changed

​
Build 0.52.0

TESTNET UPDATE SCHEDULED: JULY 31, 2024

​
What’s Changed

➡ See the full list of changes here.

​
Performance Results

​
v0.51

MAINNET UPDATE: JULY 17, 2024
TESTNET UPDATE: JULY 2, 2024

​
Release Highlights

​
HIP 206

Functionality
  • Defines a new function to the Hedera Token Service system contract that allows for the atomic transfer of HBAR, fungible tokens and non-fungible tokens.
    • Function cryptoTransfer(TransferList transferList,TokenTransferList[] tokenTransfer)
  • Exposes an existing HAPI call via smart contracts.
  • Transfer respects granted allowances.
Benefits
  • Enables native royalty support on the EVM since native $hbar can now be transferred using spending allowances
  • Direct interaction with HBAR and HTS tokens
  • Eliminates the need for token wrapping.
  • Enhances efficiency and reduces complexity.
  • Cuts costs by removing intermediary steps i.e., wrapping assets to interact with them.
  • Enables native royalty support on the EVM since native HBAR can now be transferred using spending allowances

​
HIP 906

Functionality
  • Introduces a new Hedera Account Service system contract.
  • Enables querying and granting approval of HBAR to a spender account from smart contracts code
    • hbarAllowance, hbarApprove
  • Developers do not have to context switch out of smart contract code
Benefits
  • Introduces new account proxy contract for HBAR allowances
  • Enables grant, retrieve, and manage HBAR allowances within smart contracts
    • Developers do not have to context switch out of smart contracts code
  • Simplifies workflows and enhances security
  • Expands potential use cases, especially for DeFi and token marketplaces

​
0.51.5

​
What’s Changed

➡ See the full list of changes here.

​
Performance Results

​
v0.50

MAINNET UPDATE: JUNE 20, 2024
TESTNET UPDATE: JUNE 5, 2024

​
0.50.1

​
What’s Changed

➡ See the full list of changes here.

​
0.50.0

​
What’s Changed

➡ See the full list of changes here.

​
Performance Results

​
v0.49

MAINNET UPDATE: MAY 22, 2024
TESTNET UPDATE: MAY 14, 2024

​
0.49.7

​
What’s Changed

​
0.49.6

​
What’s Changed

​
0.49.5

​
What’s Changed

​
0.49.1

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What’s Changed

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0.49.0

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What’s changed

➡ See the full list of changes here.

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Performance Results

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v0.48

MAINNET UPDATE: APRIL 25, 2024
TESTNET UPDATE: APRIL 18, 2024

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0.48.1

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What’s Changed

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0.48.0

TESTNET UPDATE: APRIL 11, 2024

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What’s Changed

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Performance Results

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v0.47

MAINNET UPDATE: APRIL 4, 2024
TESTNET UPDATE: MARCH 28, 2024

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0.47.4

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What’s Changed

  • chore: cherry-pick unified CryptoCreate throttle reclamation (#12339).

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0.47.3

TESTNET UPDATE: MARCH 20, 2024

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What’s Changed

  • chore: Configure maxAggregateRels to 15 million (all envs) (#12053).

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0.47.2

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What’s Changed

  • fix: Update Configuration hashesRamToDiskThreshold to 0 in MerkleDbConfig
  • fix: Backport the fix for virtual map flushes.

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0.47.1

TESTNET UPDATE: FEBRUARY 29, 2024

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What’s Changed

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0.47.0

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What’s Changed

➡ See the full list of changes here.

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Performance Results

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v0.46

MAINNET UPDATE: FEBRUARY 21, 2024
TESTNET UPDATE: FEBRUARY 6, 2024

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0.46.3

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What’s Changed

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0.46.2

TESTNET UPDATE: JANUARY 30, 2024

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What’s Changed

  • fix: Ensure that the pending creation customizer applies to the address being created by @lukelee-sl in #11213

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0.46.1

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What’s Changed

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0.46.0

TESTNET UPDATE: JANUARY 23, 2024

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What’s Changed

➡ See the full list of changes here.

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Performance Results

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v0.45

MAINNET UPDATE: JANUARY 9, 2024
TESTNET UPDATE: DECEMBER 28, 2023

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0.45.2

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What’s Changed

  • fix: Added a feature flag which is by default enabled to disable tokenBalances and tokenRelationships in getAccountInfo, getAccountBalance and getContractInfo queries. #10639

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0.45.0

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Performance Results

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v0.44

MAINNET UPDATE: DECEMBER 19, 2023
TESTNET UPDATE: DECEMBER 12, 2023

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0.44.3

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What’s Changed

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0.44.2

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What’s Changed

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0.44.1

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Bug Fixes

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0.44.0

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Features

  • Re-add bootstrap.properties file to maintain downstream processes and increase accounts.maxNumber=20_000_000 #8915
  • 8815: sort dirty leaves during flush #8981
  • Add setting to disable critical quorum. #8961
  • Add a doc for all system entity numbers #8993
  • 08566 - Validate PCES Events When Loading State On Different Network #8568
  • Differential testing analytic engine: State file file dumper now dumps special files #8991
  • Added improved startup ASCII art. #9028
  • Characterize invalid id failure modes for classic HTS calls #9053
  • Add ordinals to status diagram, and update javadocs #9108
  • 5552: Create a Grafana Data Dashboard to view all existing relevant data metrics #8845
  • Update Besu to version 23.10.0 #9168
➡ See the full list of changes here.

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Performance Results

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v0.43

MAINNET UPDATE: NOVEMBER 27, 2023
TESTNET UPDATE: NOVEMBER 2, 2023
Services v0.43.0 adds the following features:

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Enhancements

Services v0.43.0 adds the following enhancements:
  • Update Besu to 23.10.0 - cherry pick (#9199)
  • Update the Besu EVM library to version 23.7.2 (#8472)
  • “Productizing” contract disassembler at last (#8563)
  • Auto sidecar validations (#8404)
  • Create fat jar with services CLI so it can be run standalone (#8519)

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Performance Results

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v0.42

MAINNET UPDATE: OCTOBER 24, 2023
TESTNET UPDATE: SEPTEMBER 26, 2023

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0.42.6

This release updates the platform SDK version from 0.42.0 to 0.42.6, which removes reconnect.asyncStreamTimeout from the settings files. Doing so ensures that this property will default to the value specified in code (300 seconds).

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Changes

  • Upgrade platform SDK (#9224)

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0.42.2

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Changes

  • 0.42 account balance test (#8866)
  • Re-add bootstrap.properties file and increase accounts.maxNumber=20_000_000 (#8928)

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0.42.1

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Changes

  • Chore: normalize configuration values (release/0.42) (#8668)
  • 8751: No data source metrics for accounts, NFTs, or token rels (#8798)

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0.42.0

  • Add EIP 2930 support to EthTXData (#7696)
  • Provide entity and throttle dashboards (#7774)
  • 07748 Postconsensus signature gathering (#7776)
  • Enable EIP-2930 transactions by default (#7786)
  • 7570: Remove JasperDB (#7803)
  • Remove support for legacy sync gossip. (#8059)
  • Disable account balance exports (#8272)
  • Modify config to support state on disk by default (#8510)

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Performance Results

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v0.41

MAINNET UPDATE: SEPTEMBER 20, 2023
TESTNET UPDATE: AUGUST 22, 2023
  • Ethereum transaction type support is expanded to include type 1 transactions (#7670) which follow EIP 2930 RLP encoding. This increases the number of native EVM tools and scenarios the Hedera Smart Contract Service supports.
  • NFT mint pricing is changed to linearly scale based on number of serials minted. Also, minting a single NFT in collection is changed to cost 0.02from0.02 from 0.05. #7769

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Performance Results

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v0.40

MAINNET UPDATE: AUGUST 15, 2023
TESTNET UPDATE: AUGUST 8, 2023
TESTNET UPDATE: JULY 19, 2023
The 0.40 release of Consensus Node delivers HIP-729 ~ “Contract Accounts Nonce Externalization”. Smart contract developers using the Hedera public mirror node can now track contract nonces as they would on e.g., Ethereum. Use cases might include troubleshooting failed contract calls or writing unit tests that validate transaction ordering based on CREATE1 addresses (once these are set by default in release 0.41+). Open source contributors to the project will notice major refinements in the Gradle build, thanks to @jjohannes’s expert touch.

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Performance Results

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v0.39

MAINNET UPDATE: JULY 11, 2023
TESTNET UPDATE: JUNE 21, 2023
Services v0.39.0 adds the following features:
  • VirtualRootNode constructor creates a cache object that doesn’t get reused #6321
  • Implement blocklisting of EVM addresses #5799
  • Optimize virtual node cache flush strategy #5568
  • HIP-721: 06026 - add software version to events #6236
  • Implement CryptoCreate handle method #6112
  • UtilPrng handle Implementation #6310
  • Add a PCLI sub command to sign services stream files #6309
  • Implement token freeze handling #6467
  • Implement token unfreeze handle() #6502
  • Combine Admin and Network modules #6511
  • Implement the modular Pre-Handle Workflow #6291
  • Move hashes out of leaves node in VirtualMap #5825
  • TokenFeeScheduleUpdate handle() implementation #6582
  • Basic File service implementation #6522
  • Implement Token Association to Account #6609
  • Implementation of handle workflow #6476
  • Implement the modular record cache #6754
  • CryptoDelete handle implementation #6694

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Performance Results

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v0.38

MAINNET UPDATE: JUNE 8, 2023
TESTNET UPDATE: JUNE 1, 2023
TESTNET UPDATE: MAY 18, 2023
  • Upgrade EVM to Shanghai #5964
  • EVM version update and optimizations #5962
  • Turn on the Shanghai version of the EVM in previewnet #6212
  • Update hedera-protobufs-java version to 0.38.10 #6579
  • Add PCLI command to sign account balance files #6264

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Performance Results

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v0.37

MAINNET UPDATE: MAY 17, 2023
TESTNET UPDATE: APRIL 24, 2023

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Features

  • Implement topic deletion prehandle (#5033)
  • Generalize workflows enabled and add workflow ports (#5032)
  • Pre-handle improvements (#5056)
  • Support auto-scheduling operations by type within a suite (#5054)
  • Add SPI and App components supporting TransactionDispatcher for modularized HCS (#5062)
  • added the missing functionality to FileSignTool (#5100)
  • Consensus Message Submission Prehandle (#5059)
  • Add IngestChecker mono adapters for sigs and solvency (#5098)
  • [HIP-583] Finalize hollow accounts via any required signature in a txn (#4990)
  • Remove CryptoCreate capability to create hollow accounts (#4998)
  • Populate EVM Address in CryptoTranscation (#5010)
  • Enable All EVM E2E suites to run with Ethereum Calls (#4375)

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Performance Results

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v0.36

MAINNET UPDATE: APRIL 20, 2023
TESTNET UPDATE: APRIL 13, 2023
TESTNET UPDATE: APRIL 4, 2023

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Features

Services v0.36.0 adds the following functionality:
  • Add tracking of property changes for hollow account completion (#4647)
  • Adding support for Redirect Token Calls fro evm-module (#4880)
  • Update FileSignTool (#4988)
  • Adding block number tool (#4997)
  • Add client.workflow.operations and test with workflows (#5053)
  • update hedera-services to use FSTS CLI instead of system properties
  • 6166: Migrate VirtualMap data from JasperDB to MerkleDb data sources
  • Implementation of current network functionality in new, modularized application architecture: consensus operations, query workflow, and various preHandle implementations

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Security Updates: Hedera Smart Contract Service Security Model Changes

Changes from services v0.35.2 have also been ported to v0.36.0.
  • After the security incident on March 9th, the engineers conducted a thorough analysis of the Smart Contract Service and the Hedera Token Service system contracts.
  • As part of this exercise, we did not find any additional vulnerabilities that could result in an attack that that which we witnessed on March 9th.
  • The team also looked for any disparities between the expectations of a typical smart contract developer who is used to working with the Ethereum Virtual Machine (EVM) or ERC token APIs and the behaviors of the Hedera Token Service system contract APIs. Such differences in behavior could be used by a malicious smart contract developer in unexpected ways.
  • In order to eliminate the possibility of these behavioral differences being utilized as attack vectors in the future, the consensus node software will align the behaviors of the Hedera Smart Contract Service token system contracts with those of EVM and typical token APIs such as ERC 20 and ERC 721.
  • As a result, the following changes are made as of the mainnet 0.35.2 release on March 31st:
    • An EOA (externally owned account) will have to provide explicit approval/allowance to a contract if they want the contract to transfer value from their account balance.
    • The behavior of transferFrom system contract will be exactly the same as that of the ERC 20 and ERC 721 spec transferFrom function.
    • For HTS specific token functionality (e.g. Pause, Freeze, or Grant KYC), a contract will be authorized to perform the associated token management function only if the ContractId is listed as a key on the token (i.e. Pause Key, Freeze Key, KYC Key respectively).
    • The transferToken and transferNFT APIs will behave as transfer in ERC20/721 if the caller owns the value being transferred, otherwise it will rely on approve spender allowances from the token owner.
    • The above model will dictate entity (EOA and contracts) permissions during contract executions when modifying state. Contracts will no longer rely on Hedera transaction signature presence, but will instead be in accordance with EVM, ERC and ContractId key models noted.
  • As part of this release, the network will include logic to grandfather in previous contracts.
    • Any contracts created from this release onwards will utilize the stricter security model and as such will not have considerations for top-level signatures on transactions to provide permissions.
    • Existing contracts deployed prior to this upgrade will be automatically grandfathered in and continue to use the old model that was in place prior to this release for a limited time to allow for DApp/UX modification to work with the new security model.
    • The grandfather logic will be maintained for an approximate period of 3 months from this release. In a future release in July 2023, the network will remove the grandfather logic, and all contracts will follow the new security model.
    • Developers are encouraged to test their DApps with new contracts and UX using the new security model to avoid unintended consequences. If any DApp developers fail to modify their applications or upgrade their contracts (as applicable) to adhere to the new security model, they may experience issues in their applications.

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Performance Results

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v0.35

MAINNET UPDATE: MARCH 31, 2023
TESTNET UPDATE: MARCH 16, 2023

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0.35.2 Hedera Smart Contract Service Security Model Changes

  • After the security incident on March 9th, the engineers conducted a thorough analysis of the Smart Contract Service and the Hedera Token Service system contracts.
  • As part of this exercise, we did not find any additional vulnerabilities that could result in an attack that that which we witnessed on March 9th.
  • The team also looked for any disparities between the expectations of a typical smart contract developer who is used to working with the Ethereum Virtual Machine (EVM) or ERC token APIs and the behaviors of the Hedera Token Service system contract APIs. Such differences in behavior could be used by a malicious smart contract developer in unexpected ways.
  • In order to eliminate the possibility of these behavioral differences being utilized as attack vectors in the future, the consensus node software will align the behaviors of the Hedera Smart Contract Service token system contracts with those of EVM and typical token APIs such as ERC 20 and ERC 721.
  • As a result, the following changes are made as of the mainnet 0.35.2 release on March 31st:
    • An EOA (externally owned account) will have to provide explicit approval/allowance to a contract if they want the contract to transfer value from their account balance.
    • The behavior of transferFrom system contract will be exactly the same as that of the ERC 20 and ERC 721 spec transferFrom function.
    • For HTS specific token functionality (e.g. Pause, Freeze, or Grant KYC), a contract will be authorized to perform the associated token management function only if the ContractId is listed as a key on the token (i.e. Pause Key, Freeze Key, KYC Key respectively).
    • The transferToken and transferNFT APIs will behave as transfer in ERC20/721 if the caller owns the value being transferred, otherwise it will rely on approve spender allowances from the token owner.
    • The above model will dictate entity (EOA and contracts) permissions during contract executions when modifying state. Contracts will no longer rely on Hedera transaction signature presence, but will instead be in accordance with EVM, ERC and ContractId key models noted.
  • As part of this release, the network will include logic to grandfather in previous contracts.
    • Any contracts created from this release onwards will utilize the stricter security model and as such will not have considerations for top-level signatures on transactions to provide permissions.
    • Existing contracts deployed prior to this upgrade will be automatically grandfathered in and continue to use the old model that was in place prior to this release for a limited time to allow for DApp/UX modification to work with the new security model.
    • The grandfather logic will be maintained for an approximate period of 3 months from this release. In a future release in July 2023, the network will remove the grandfather logic, and all contracts will follow the new security model.
    • Developers are encouraged to test their DApps with new contracts and UX using the new security model to avoid unintended consequences. If any DApp developers fail to modify their applications or upgrade their contracts (as applicable) to adhere to the new security model, they may experience issues in their applications.

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Features

  • HIP-583 to expand alias support in CryptoCreate & CryptoTransfer Transactions.
This includes,
  • CryptoTransfer to non-existing EVM address alias causing hollow-account creation.
  • Finalizing a hollow account with the payer signature in an incoming transaction
Use cases for HIP-583 that work in this release :
  1. As a user with an ECDSA based account from another chain I can have a new Hedera account created based on my evm-address alias.
  2. As a developer, I can create a new account using a evm-address alias via the CryptoTransfer transaction.
  3. As a developer, I can transfer HBAR or tokens to a Hedera account using their evm-address alias.
  4. As a Hedera user with an Ethereum-native wallet, I can receive HBAR or tokens in my account by sharing only my evm-address alias.
  5. As a Hedera user with a Hedera-native wallet, I can transfer HBAR or tokens to another account using only the recipient’s evm-address alias.

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Configuration Changes

autoCreation.enabled=true
lazyCreation.enabled=true
cryptoCreateWithAliasAndEvmAddress.enabled=false
contracts.evm.version=v0.34

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Performance Results

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v0.34

MAINNET UPDATE: FEBRUARY 9, 2023
TESTNET UPDATE: JANUARY 24, 2023

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0.34.3

Use v0.34.3 SDK.

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0.34.0

Services v0.34.0 completes the implementation of HIP-583. To ensure full test coverage of this intricate feature, it will first be enabled only on previewnet. This release will not enable smart contract rent.

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Performance Results

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v0.33

MAINNET UPDATE: JANUARY 12, 2023
TESTNET UPDATE: DECEMBER 22, 2022
Services v0.33.0 adds the following features:
  • Hyperledger Besu EVM updated to version 22.10.x
  • ‘accounts send’ subcommand added to yahcli to support sending HTS token units
  • Developer documentation updates

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v0.31

MAINNET UPDATE: DECEMBER 9, 2022
TESTNET UPDATE: DECEMBER 1, 2022
TESTNET UPDATE: NOVEMBER 11, 2022
TESTNET UPDATE: OCTOBER 27, 2022
Services 0.31 completes the following features:
  • HIP-542 roadmap for making payer of the CryptoTransfer sponsor for auto-creation. It also enables auto-creation with Token transfers in addition to Hbar transfers.
  • HIP-564 roadmap for allowing zero unit fungible token transfers
  • HIP-573 roadmap for enabling token creators an option to exempt all of their token’s fee collectors from a custom fee.
In addition to the above features,
  • Adds support of the ERC20/721 transferFrom method for HTS precompiles from HIP-514 roadmap.
  • Enables Smart Contract Traceability.
  • Adds some changes related to testability improvements.

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v0.30

MAINNET UPDATE: OCTOBER 21, 2022
TESTNET UPDATE: OCTOBER 19, 2022
TESTNET UPDATE: OCTOBER 6, 2022
Services 0.30 completes the HIP-514 roadmap for making Hedera native tokens manageable via smart contracts. There are five new system contracts: getTokenExpiryInfo(address), updateTokenExpiryInfo(address, Expiry), isToken(address token), getTokenType(address token), and updateTokenInfo(address, HederaToken). The updateTokenInfo(address, HederaToken) call is especially powerful. If a token’s admin key signs the transaction calling a contract, that contract can now make itself the token’s treasury, assume authority to mint or burn units or NFTs, and so on. ⚠️ Contract authors should know this release initiates Hedera’s expiration and rent model for contracts. There will be two visible effects immediately after the 0.30 upgrade:
  • All non-deleted contracts will have their expiry extended to at least 90 days after the upgrade date.
  • Deleted contracts will start to be purged from state; so a getContractInfo query that previously
    returned CONTRACT_DELETED may now report INVALID_CONTRACT_ID.
About 90 days after the 0.30 upgrade, some contracts will begin to expire. The network will try to automatically charge the renewal fee (approximately $0.026 for 90 days) to the expired contract’s auto-renew account. If an auto-renew account has zero balance, the network will then try to charge the contract itself. A contract unable to pay renewal fees will enter a week-long “grace period” during which it is unusable, unless its expiry is extended via ContractUpdate or it receives hbar. After this grace period, the contract will be purged from state. We strongly encourage all contract authors to set an auto-renew account for their contract. This isolates the contract logic from the existence of rent. This release also brings two peripheral improvements:
  1. It will become possible to schedule a CryptoApproveAllowance transaction.
  2. Mirror node operators will be able to use the daily NodeStakeUpdate export to track the current values of several key staking properties. Please review the linked protobuf comments for more details on these properties.

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v0.29

MAINNET UPDATE: SEPTEMBER 27, 2022
TESTNET UPDATE: SEPTEMBER 7, 2022
TESTNET UPDATE: AUGUST 30, 2022

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Contract-managed tokens 🪙

In Services 0.29 we have followed the HIP-514 roadmap to give contract authors many new ways to inspect and manage HTS tokens. The HIP enumerates the ways; examples include a contract that revokes an account’s KYC for a token, or deletes a token for which it has admin privileges, or even changes a token’s supply key based on the metadata in an NFT! Note there are four HIP-514 functions that will be part of release 0.30, as follows: getTokenExpiryInfo(address), updateTokenExpiryInfo(address, Expiry), updateTokenInfo(address, HederaToken), isToken(address token) and getTokenType(address token). HIP-435 Record Stream v6 will be enabled on testnet and mainnet in this release.

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Deprecations

Please note this important deprecation that will change how clients fetch token associations and balances after the November release in this year. At that time, mirror nodes will become the exclusive source of token association metadata. This is because HIP-367 made token associations unlimited, so in the long run it will not be efficient for consensus nodes to serve this information.

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v0.28

MAINNET UPDATE: AUGUST 25, 2022
TESTNET UPDATE: JULY 29, 2022
Services 0.28 gives Hedera devs a new dApp building block in HIP-351 (Pseudorandom Numbers). HAPI has a new UtilService with a prng transaction that generates a record with either a pseudorandom 48-byte seed, or an integer in a requested range. Smart contracts can also get pseudorandom values by calling a new system contract at address 0x169, using the interface here as in this example. Applications might include NFT mint contracts, lotteries, and so on. 📝 The HIP-351 text does not yet reflect the name change from RandomGenerate to prng, or the system contract specification. It does explain in detail how prng derives its entropy from the running hash of transaction records generated by the network. This release also includes some bug fixes and smaller improvements; notably, it:
  1. Extends ContractCallLocal support to the ERC-20 and ERC-721 functions allowance, getApproved, and isApprovedForAll.
  2. Permits staking to contract accounts.

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v0.27

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v0.27.7

MAINNET UPDATE: AUGUST 9, 2022
Any ledger that will grow to billions of entities must have an efficient way to remove expired entities. In the Hedera network, this means keeping a list of NFTs owned by an account, so that when an account expires, we can return its NFTs to their respective treasury accounts. Under certain conditions in the 0.27.5 release, a bug in the logic maintaining these lists could cause NFT transfers to fail, without refunding fees. We appreciate the Hedera community working with us on this issue. We invite any users who were affected by this bug to contact support at support@hedera.com.

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v0.27.0

MAINNET UPDATE: JULY 21, 2022
TESTNET UPDATE: JULY 1, 2022
The 0.27 release of Consensus Node initiates the first phase of HIP-406 (Staking). We deeply appreciate the community’s feedback on this critical feature! As wallets and exchanges roll out client support, users will now have the choice to stake their hbar to a node. As nodes accumulate stake, from both individuals and organizations, they will become eligible to pay rewards to their stakers. At this point, once the 0.0.800 account balance has crossed a threshold to be set by the council coin committee, rewards will be permanently activated. This will set the stage for the second phase of staking, in which a node’s contribution to consensus becomes a direct function of its stake, and community nodes with sufficient stake can begin to participate in consensus. Please note the decentralized nature of this process makes it hard to predict exactly when each milestone and phase will be achieved. The immediately visible consequences of the 0.27 release will be simply,
  1. The consensus nodes handle CryptoCreate and CryptoUpdate transactions with staking elections---even if not all wallets and exchanges are updated to make these elections just yet.
Observant readers might recall that an earlier alpha release of Services 0.27 also enabled HIP-423 (Long Term Scheduled Transactions). This is a complex feature with some deep implications, and we have decided to defer for one more release before going to production.

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v0.26

MAINNET UPDATE: JUNE 9, 2022
TESTNET UPDATE: MAY 25, 2022
In this release, we are excited to deploy support for HIP-410 (Wrapping Ethereum Transaction Bytes in a Hedera Transaction). and HIP-415 (Introduction Of Blocks). HIP-410 adds a HAPI EthereumTransaction by which an account that was auto-created with an ECDSA(secp256k1) key can submit Ethereum transactions to Hedera by signing with its ECDSA key. (Standard Ethereum restrictions on the sender’s nonce apply.) Please see HIP-410 for details, including a summary of some very compelling use cases that the EthereumTransaction enables---for example, “I want to use MetaMask to create a transaction to transfer HBAR to another account”. HIP-415 also anticipates such use cases by standardizing the concept of a Hedera “block”; this is important for a full implementation of the Ethereum JSON-RPC API. The definition is simple: One block is all the transactions in a record stream file. The block hash is the 32-byte prefix of the transaction running hash at the end of the file. And the block number is the index of the record file in the full stream history, where the first file had index 0. Consensus Node 0.26 implements HIP-376, allowing smart contract developers to use the familiar EIP-20 and EIP-721 “operator approval” with both fungible and non-fungible HTS tokens. Approved operators can manage an owner’s tokens on their behalf; this is necessary for many consignment use cases with third party brokers/wallets/auctioneers. Any permissions granted in a contract through approve() or setApprovalForAll() have an equivalent HAPI cryptoApproveAllowance or cryptoDeleteAllowance expression---and this expression is externalized as a HAPI TransactionBody in the record stream. That is, the HIP-376 system contracts expose a subset of the native HAPI operations, only within the EVM.

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v0.25

MAINNET UPDATE: MAY 19, 2022
TESTNET UPDATE: APRIL 26, 2022
TESTNET UPDATE: APRIL 21, 202
The Consensus Node 0.25 release brings good news for HTS users who manage large numbers of token types, as it delivers HIP-367 (Unlimited Token Associations per Account). In particular, a single account can now serve as treasury for any number of token types. (Please do note the CryptoService HAPI queries still return information for only an account’s 1000 most recently associated tokens; mirror nodes remain the best source for full history.) We are also very excited to announce support for HIP-358 (Allow TokenCreate through Hedera Token Service Precompiled Contract). This HIP supercharges contract integration, making it possible for a smart contract to create a new HTS token---fungible or non-fungible, with or without custom fees. (An interested Solidity developer might consult the examples in this contract.) In a harbinger of more upcoming HTS precompile support, this release will also enable HIP-336 (Approval and Allowance API for Tokens). Token owners can now approve other accounts to manage their HTS tokens or NFTs, in direct analogy to the approve() and transferFrom() mechanisms in ERC-20 and ERC-721 style tokens.

​
Enhancements

  • HIP-336 implementation #2814
  • HIP-358 implementation #3015
  • HIP-367 implementation #2917

​
Fixes

  • ERC view functions now usable in ContractCallLocalQuery #3061

​
v0.24

MAINNET UPDATE: APRIL 15, 2022
TESTNET UPDATE: APRIL 7, 2022
TESTNET UPDATE: MARCH 31, 2022
TESTNET UPDATE: MARCH 24, 2022
In the 0.24 release of Consensus Node, we are excited to give smart contract developers a new level of interoperability with native Hedera Token Service (HTS) tokens via HIP-218 (Smart Contract interactions with Hedera Token Accounts). The Hedera EVM now exposes every HTS fungible token as an ERC-20 token at the address of the token’s 0.0.X entity id; and analogously, every HTS non-fungible token appears as an ERC-721 token. This means a smart contract can look up its balance of a fungible HTS token; or change its behavior based on the owner of a particular HTS NFT. Please see the linked HIP for full details. This upgrade also creates two new system accounts 0.0.800 and 0.0.801 that will hold reward funds. One change to the Hedera API (HAPI) is that we now have enough evidence to conclude the experimental getAccountNftInfos and getTokenNftInfos queries do not have a favorable cost/benefit ratio, and these queries are now permanently disabled.

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v0.23

MAINNET UPDATE: MARCH 10, 2022
TESTNET UPDATE: FEBRUARY 17, 2022
Consensus Node 0.23 fleshes out our smart contract service via the implementation of HIP-329 (Support CREATE2 opcode). Smart contract developers are now free to use the CREATE2 EVM opcode. A typical use case is a distributed exchange that wants its pair contracts to have deterministic addresses based on the tokens in the pair. Please note two issues fixed in this release. First, in release 0.22, the nodes returned the bytes ledger_id stipulated by HIP-33 as a UTF-8 encoding of a hex string. The returned bytes are now the big-endian representation of the ledger’s numeric id. Second, prior to this release, the record of a dissociateToken from a deleted token did not list the discarded balance of the dissociated account if the token’s treasury was missing. This is now fixed.

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v0.22

MAINNET UPDATE: FEBRUARY 3, 2022
TESTNET UPDATE: JANUARY 20, 2022
The 0.22 release is a paradigm shift for Consensus Node, as we deliver the next major step in our Smart Contracts 2.0 roadmap on the strength of the protean HIP-25, a technical foundation for scaling the world state of our ledger to billions of entities without sacrificing the high TPS enabled by the hashgraph consensus algorithm. Highlights of this release include:
  • Network EVM capacity increased to 15M gas-per-second. (Please see HIP-185 for details.)
  • Gas limit per ContractCreate or ContractCall raised to 4M.
  • Per-contract storage capacity increased to 10MB.
  • Solidity integration with native HTS tokens. (Please see HIP-206 for details.)
We expect more progress in these directions over the coming releases. Do note that the gas usage of the HTS integrations is still evolving; follow this issue to track the finalized gas charges leading up to mainnet release. There are two other HIP’s included in this release not related to the smart contract service. First, HIP-33 enhances queries like CryptoGetInfo with a ledger id that marks which Hedera network answered the query. Second, HIP-31 allows a client to include the expected decimals for a token in a CryptoTransfer. This means a hardware wallet can guarantee its token transactions will have the precision seen by the user in the device display. While we are gaining momentum in our smart contracts roadmap, we are also deeply committed to improving the developer experience, and welcome issues and ideas in our GitHub repository and Discord!

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v0.21.0

MAINNET UPDATE: JANUARY 13, 2022
TESTNET UPDATE: DECEMBER 21, 2021
In Consensus Node 0.21 we are pleased to announce support for ECDSA(secp256k1) keys and auto-account creation. The Ethereum network makes heavy use of ECDSA cryptography with the secp256k1 curve, and by supporting these keys we ease the developer experience of migrating a dApp to Hedera. Anywhere a Ed25519 key can be used in the Hedera API, it is now possible to substitute an ECDSA(secp256k1) key. Auto-account creation lets a new user receive ℏ via a CryptoTransfer without having already created an 0.0.X id on the network. The new user only needs to provide their public key, and when a sponsor account sends ℏ “to” their key via a new AccountID.alias field, the network automatically creates an account with their key. Additional transfers to and from an auto-created account may also use its alias instead of the account id. An alias may also be used to get the account balance and account info for the account. (Do note there is a known issue that causes the getAccountInfo query response to echo back the account alias instead of its 0.0.<num> id; this will be fixed in the next release. Please use the free getAccountBalance query to check the 0.0.<num> id that corresponds to an alias.) You will be able to use the alias in all other transactions and queries in a future release. Meanwhile, our team continues exhaustive due diligence for Smart Contracts 2.0… 🚀

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v0.20.0

MAINNET UPDATE: DECEMBER 2,2021
TESTNET UPDATE: NOVEMBER 18, 2021
Consensus Node 0.20 is primarily a scaffolding release, as our team is working heads-down to deliver the Smart Contract Service refresh with massive new scale and performance; as well as smart contract integration with native tokens created using the Hedera Token Service. The scope of this refresh is significant, and we believe it will be well worth the wait. The main deliverables in this release are improved automation for node operators to use in software upgrades; and a handful of minor bug fixes, including for #2432. Please also note the following deprecations in the Hedera API protobufs:

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v0.19.4

MAINNET UPDATE: NOVEMBER 4,2021
TESTNET UPDATE: OCTOBER 28, 2021

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v0.19.3

TESTNET UPDATE: OCTOBER 21, 2021
In Consensus Node 0.19, we are thrilled to announce migration of the Hedera smart contract service to the Hyperledger Besu EVM, as laid out in HIP-26. This enables support for the latest v0.8.9 Solidity contracts, and harmonizes our gas schedule with that of the “London” hard fork. The Besu migration also sets the stage for a step change in smart contract performance on Hedera. Two other HIPs targeting the Hedera Token Service go live in this release. First, the HIP-23 feature set is now enabled, so that any account that has been configured with a non-zero maxAutoAssociations can receive air-drops (i.e., units or NFTs of a token type without explicit association). Second, we have also implemented HIP-24, which provides a safety measure for token types created with a pauseKey. If a TokenPause is submitted with this key’s signature, then all operations on the token will be suspended until a subsequent TokenUnpause.

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v0.18.1

MAINNET UPDATE: OCTOBER 7, 2021
In Consensus Node 0.18.1, we have a new scalability profile for NFTs in the Hedera Token Service (HTS). Up to fifty million (50M) NFTs, each with 100 bytes of metadata, may now be minted. Of course our CryptoTransfer and ConsensusSubmitMessage operations are still supported at 10k TPS even with this scale. In this release, we have also enabled automatic reconnect. This feature comes into play when a network partition causes a node to “fall behind” in the consensus protocol. With reconnect enabled, the node can use a special form of gossip to “catch up” and resume participation in the network with no human intervention. This works even when the node has missed many millions of transactions, and the world state is very different from when it was last active. We are happy to also announce that accounts can be customized to take advantage of the upcoming HIP-23 (Opt-in Token Associations) feature set. That is, an account owner can now “pre-pay” for token associations via a CryptoCreate or CryptoUpdate transaction, without knowing in advance which specific token types they will use. Once HIP-23 is fully enabled in release 0.19, when their account receives units or NFT’s of a new token type via a CryptoTransfer, the network will automatically create the needed association---no explicit TokenAssociate transaction needed. This supports several interesting use cases; please see the linked HIP-23 for more details. There are three other points of interest in this release. First, we have removed the HIP-18 limitations noted in the previous release. The tokenFeeScheduleUpdate transaction has been re-enabled, and multiple royalty fees can now be charged for a non-fungible token type. Second, the address books in system files 0.0.101 and 0.0.102 will now populate their ServiceEndpoint fields. (However, the deprecated ipAddress, portno, and memo fields will no longer be populated after the next release.) Third, please note that the TokenService getTokenNftInfos and getAccountNftInfos queries are now deprecated and will be removed in a future release. The best answers to such queries demand historical context that only Mirror Nodes have; so these and related queries will move to mirror REST APIs. Developers will likely appreciate two other release 0.18.1 items. First, we have migrated to Dagger2 for dependency injection. Second, there is a new getExecutionTime query in the NetworkService that supports granular performance testing in development environments.

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v0.18.0

TESTNET UPDATE: SEPTEMBER 23, 2021
In Consensus Node 0.18.0, we are happy to announce support for HIP-23 (Opt-in Token Associations). This feature lets an Hedera account owner “pre-pay” for token associations via a CryptoCreate or CryptoUpdate transaction, without knowing in advance which specific token types they will use. Then, when their account receives units or NFT’s of a new token type via a CryptoTransfer, the network automatically creates the needed association---no explicit TokenAssociate transaction needed. This supports several interesting use cases; please see the linked HIP-23 for more details. There are three other points of interest in this release. First, we have removed the HIP-18 limitations noted in the previous release. The tokenFeeScheduleUpdate transaction has been re-enabled, and multiple royalty fees can now be charged for a non-fungible token type. Second, the address books in system files 0.0.101 and 0.0.102 will now populate their ServiceEndpoint fields. (However, the deprecated ipAddress, portno, and memo fields will not be no longer be populated after the next release.) Third, please note that the TokenService getTokenNftInfos and getAccountNftInfos queries are now deprecated and will be removed in a future release. The best answers to such queries demand historical context that only Mirror Nodes have; so these and related queries will move to mirror REST APIs. Developers will likely appreciate two other release 0.18.0 items. First, we have migrated to Dagger2 for dependency injection. Second, there is a new getExecutionTime query in the NetworkService that supports granular performance testing in development environments. Performance Measurement Results:

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v0.17.4

MAINNET UPDATE: SEPTEMBER 2, 2021
TESTNET UPDATE: AUGUST 30, 2021
In Consensus Node 0.17.2, we are excited to announce support for HIP-17 (Non-fungible Tokens), with a complementary extension to HIP-18 (Custom Hedera Token Service Fees) that lets an NFT creator set a royalty fee to be charged when fungible value is exchanged for one of their creations. Unique token types and minted NFTs are more natural for many use cases than fungible token types. The Hedera Token Service now supports both natively, so that a single CryptoTransfer can perform atomic swaps with any arbitrary combination of fungible, non-fungible, and ℏ transfers. (Please do note that the “paged” getAccountNftInfos and getTokenNftInfos queries will remain disabled until release 0.18.0, as several large performance improvements are pending.) In this release we have made it possible to denominate a fixed fee in the units of the token to which it is attached (assuming the type of this token is FUNGIBLE_COMMON). Custom fractional fees may now also be set as “net-of-transfer”. In this case the recipient(s) in the transfer list receive the stated amounts, and the assessed fee is charged to the sender. There are a few final points of more specialized interest. First, users of the scheduled transaction facility may now also schedule TokenBurn and TokenMint transactions. Second, network administrators issuing a CryptoUpdate to change the treasury account’s key must now sign with the new treasury key. Third, the supported TLS cipher suites have been updated to the following list:
  1. TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (TLS v1.2)
  2. TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (TLS v1.2)
  3. TLS_AES_256_GCM_SHA384 (TLS v1.3)
⚠️ There are two temporary limitations to HIP-18 in this release. First, the tokenFeeScheduleUpdate transaction is not currently available. Second, only one royalty fee will be charged for a non-fungible token type. Both limitations will be removed in release 0.18.0.

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Performance Measurement Results:

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v0.17.3

TESTNET UPDATE: AUGUST 24, 2021
Please see 0.17.4 release notes.

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v0.17.2

TESTNET UPDATE: AUGUST 19, 2021
Please see 0.17.4 release notes.

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v0.16.1

MAINNET UPDATE COMPLETED: AUGUST 5, 2021
TESTNET UPDATE COMPLETED: JULY 22, 2021
In Consensus Node 0.16.0, we are excited to announce support for HIP-18 (Custom Hedera Token Service Fees). Hedera tokens can now be created with a schedule of up to 10 custom fees, which are either fixed in units of ℏ or another token; or fractional and computed in the units of the owning token. The ledger automatically charges custom fees to accounts as they send units of a fungible token (or ownership of a NFT, see below) via a CryptoTransfer. When a custom fee cannot be charged, the CryptoTransfer fails atomically, changing no balances other than for the Hedera network fees. The five case studies in this document show the basics of how custom fees are charged, and how they appear in records. Note that at most two “levels” of custom HTS fees are allowed, and custom fee-charging cannot require changing more than 20 account balances. ⚠️ There is one variation on custom fees that requires a work-around in this release. Specifically, if a fixed fee should be collected in the units of the “parent” token to whose schedule it belongs, then in Release 0.16.0 this must be accomplished using a FractionalFee as described in this issue. In Release 0.17.0 the more natural FixedFee configuration will be available. In this release, we have also enabled previewnet support for HIP-17 (Non-fungible Tokens). Unique token types and minted NFTs are more natural for many use cases than fungible token types. The Hedera Token Service will soon support both natively, so that a single CryptoTransfer can perform atomic swaps with any arbitrary combination of fungible, non-fungible, and ℏ transfers. We are very grateful to the Hedera user community for these interesting and powerful new feature sets.

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Performance Measurement Results:

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v0.15.1

MAINNET UPDATE COMPLETED: JULY 1, 2021
TESTNET UPDATE COMPLETED: JUNE 17, 2021
In Consensus Node 0.15.1, we improved performance and integrated with the latest Platform SDK to enable full support of network reconnect. These performance improvements let us augment the Hedera world state with records of all transactions handled in the three minutes of consensus time, even when handling 10,000 transactions per second. The HAPI GetAccountRecords query now returns, from state, all such records for which the queried account was the payer account. We have also finalized the design for the non-fungible token (NFT) support to be added to the Hedera Token Service (HTS) in release 0.16.0. The protobufs for new HAPI operations are available in the 0.15.0 tag of the hedera-protobufs GitHub repository. To simplify fee calculations, there is now a maximum entity lifetime of a century for any entity whose lifetime is not _already_ constrained by the maximum auto-renew period. A HAPI transaction that tries to set an expiration further than a century from the current consensus time will resolve to INVALID_EXPIRATION_TIME.

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v0.14.0

MAINNET UPDATE COMPLETED: JUNE 3, 2021
TESTNET UPDATE COMPLETED: MAY 20, 2021
In Consensus Node 0.14.0, we have implemented account auto-renewal according to the specifications of HIP-16. This feature will not be enabled until a later date, after ensuring universal awareness of its impact in the user community. This release includes notable infrastructure work to enable use of the Platform reconnect feature. Reconnect allows a node that has fallen behind in consensus gossip to catch back up dynamically. A minor improvement to the Hedera API is that the GetVersionInfo query now includes the optional pre-release version and build metadata fields from the Semantic Versioning spec (if applicable). To simplify life for system admins who are updating a system account’s key, we now waive the signing requirement for the account’s new key.

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v0.13.2

MAINNET UPDATE COMPLETED: MAY 6, 2021
TESTNET UPDATE COMPLETED: APRIL 29, 2021 [v0.13.2]
TESTNET UPDATE COMPLETED: APRIL 22, 2021 [v0.13.0]
In Consensus Node v0.13.0, we have redesigned schedule transactions. The new design gives collaborating nodes a well-defined workflow if they happen to schedule identical transactions, even if they are using different gRPC client libraries (for example, Go and JavaScript). The new design also reduces the number of signatures required to submit a valid ScheduleSign transaction in many common use cases. Users will be able to schedule CryptoTransfer and ConsensusSubmitMessage transactions in this release. Other transaction types will be introduced in future releases.
Note: The schedule transactions feature will not be enabled in this release; it’s expected to be enabled on testnet in a subsequent v0.13.2 update on April 29th. This feature is enabled on previewnet.
This release deprecates three fields in the protobuf for system files 0.0.101 and 0.0.102. The three deprecated fields are ipAddress, portno, and memo. When we rely on these fields, we cannot concisely represent node with multiple IP addresses. For example, take mainnet node 0 (account 0.0.3), which as of this writing has proxy IPs 13.82.40.153, 34.239.82.6, and 35.237.200.180. The mainnet 0.0.101 file must include a NodeAddress entry for each proxy, which means duplicating fields like nodeCertHash. The new protobuf avoid this duplication, letting us represent node 0 in a protobuf equivalent of, 
{
    "nodeId" : 0,
    "certHash" : "337390d8fea144afc12e81254a28dac6ea82893836ac072effd85e0a7748580ef28096648c5a7f8dbb4ce81476815137",
    "nodeAccount" : "0.0.3",
    "serviceEndpoints" : [ {
      "ipAddressV4" : "13.82.40.153",
      "port" : 50211
    }, {
      "ipAddressV4" : "34.239.82.6",
      "port" : 50211
    }, {
      "ipAddressV4" : "35.237.200.180",
      "port" : 50211
    } ]
}
However, Services will continue to populate the deprecated fields in duplicate entries for six months, to give all consumers of files 0.0.101 and 0.0.102 time to prepare for exclusive use of the new format. After six months, we will eliminate the duplication and the ipAddress, portno, and memo fields will be left empty. (The fields will never be removed to ensure it remains possible to parse early versions of these system files.) In a minor point, Services now rejects any protobuf string field whose UTF-8 encoding includes the zero-byte character; that is, Unicode code point 0, NUL. Databases (for example, PostgreSQL) commonly reserve this character as a delimiter in their internal formats, so allowing it to occur in entity fields can make life harder for Mirror Node operators. To simplify tasks for network admins, we have also streamlined the signing requirements for updates to system accounts, and introduced a Docker-based utility called “yahcli” for admin actions such as updating system files.

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v0.12.0

MAINNET UPDATE COMPLETED: MARCH 12, 2021
TESTNET UPDATE COMPLETED: FEBRUARY 26, 2021
In Consensus Node v0.12.0, we completed the MVP implementation of the Hedera Scheduled Transaction Service (HSTS) as detailed in this design document. This service decouples what should execute on the ledger from when it should execute, giving new flexibility and programmability to users. Note that HSTS operations are enabled on Previewnet, but remain disabled on Testnet and Mainnet at this time. We have given users of the Hedera Token Service (HTS) more control over the lifecycle of their token associations. In v0.11.0, deleted tokens were immediately dissociated from all accounts. This automatic dissociation no longer occurs. If account X is associated with token Y, then even if token Y is marked for deletion, a getAccountInfo query for X will continue to show the association with Y _until_it is explicitly removed via a tokenDissociateFromAccount transaction. Note that for convenience, queries that return token balances now also return the decimals value for the relevant token. This allows a user to interpret e.g. balance=10050 as 100.50 tokens given decimals=2. In a final Hedera API (HAPI) change, we have extended the memo field present on contract and topic entities to the account, file, token, and scheduled transaction entities. (Note this memo is distinct from the short-lived memo that may be given to any TransactionBodyfor inclusion in the TransactionRecord.) All of these changes to HAPI are now more easily browsed via GitHub pages here; the new hashgraph/hedera-protobufs repository is now the authoritative source of the protobuf files defining HAPI. Apart from these enhancements to HAPI, the “streams” consumable by mirror node operators now include an alpha version of a protobuf file that contains the same information as the _Balances.csv files. The type of this file is AllAccountBalances.

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v0.11.0

MAINNET UPDATE COMPLETED: FEBRUARY 4, 2021
TESTNET UPDATE COMPLETED: JANUARY 26, 2021
In Consensus Node v0.11.0, we upgraded the record stream format from v2 to v5 and the event stream format from v3 to v5. These changes are described in detail in the “Record and Event Stream File Formats” article. We also updated startup code to make the number of system accounts in development and pre-production networks match the number of system accounts on mainnet, creating account numbers 900-1000 on startup if they do not exist.

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v0.10.0

MAINNET UPDATE COMPLETED: JANUARY 7, 2021
TESTNET UPDATE COMPLETED: DECEMBER 17, 2020
In Consensus Node v0.10.0, we improved the usability of the Hedera Token Service (HTS) with a newTotalSupply field in the receipts of TokenMint and TokenBurn transactions. Without this field, a client must follow the entire record stream of a token’s supply changes to be certain of its supply at the consensus timestamp in the receipt. (Note that HTS operations are now enabled on Previewnet and Testnet, but remain disabled on Mainnet at this time. Please consult the SDK documentation for HTS semantics.) Also for HTS, we added a property fees.tokenTransferUsageMultiplier that scales the resource usage assigned to a CryptoTransfer that changes token balances. This scaling factor is expected to be set so that the cost of a CryptoTransfer that changes two token balances is roughly 10x the cost of a CryptoTransfer that changes only two hbar balances. Apart from HTS, this release drops a restriction on what payer accounts can be used for CryptoUpdate transactions that target system accounts. (That is, accounts with numbers not greater than hedera.numReservedSystemEntities.) In earlier versions, only three payers were accepted: The target account itself, the system admin account, or the treasury account. Other payers resulted in a status of AUTHORIZATION_FAILED. This entire restriction is removed, with one exception---the treasury must pay for a CryptoUpdate targeting the treasury. Apart from these functional changes, we fixed an unintentional change in the naming of the crypto balances CSV file, and improved the usefulness of clients under test-clients/ for testing reconnect scenarios.

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v0.9.0

MAINNET UPDATE COMPLETED: DECEMBER 3, 2020
TESTNET UPDATE COMPLETED: NOVEMBER 19, 2020
In Consensus Node v0.9.0, we finished the alpha implementation of the Hedera Token Service (HTS). Note that all HTS operations are enabled on Previewnet, but remain disabled on Testnet and Mainnet. Please consult the SDK documentation for HTS semantics. We made several changes to the HAPI protobuf. First, we removed the deprecated SignatureList message type. Second, we added a top-level signedTransactionBytes field to the Transaction message to ensure deterministic transaction hashes across different client libraries; the top-level bodyBytes and sigMap fields are now deprecated and the already-deprecated body field is removed. Third, we deprecated all fields related to non-payer records, include account send and receive thresholds. This followed from the effective removal of non-payer records in v0.8.1. For the same reason, the semantics of the CryptoGetRecords and ContractGetRecords queries have also changed. The only queryable records are now those granted to the effective payer of a transaction that was handled while the network property ledger.keepRecordsInState=true. Such records have an expiry of 180 seconds. It is important to note that because a contract account can never be the effective payer for a transaction, any ContractGetRecords query will always return an empty record list, and we have deprecated the query.

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v0.8.1

MAINNET UPDATE COMPLETED: OCTOBER 22, 2020
TESTNET UPDATE COMPLETED: OCTOBER 7, 2020
The mainnet release includes the 0.8.0 version updates.

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v0.8.0

TESTNET UPDATE COMPLETED: SEPTEMBER 17, 2020
In Consensus Node v0.8.0, we made several minor fixes and improvements. This tag also includes pre-release implementations of several operations for an incipient Hedera Token Service (HTS). NOTE: HTS operations will remain disabled in non-development environments for some time. These operations are under active development; please consult master for up-to-date semantics.

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Enhancements

  • Deprecated fields related to threshold records in HAPI protobuf #506
  • Update Receipt proto to pair each Status with NodeID - Receipt is deleted only when the latest (duplicate) transaction expires. getTxRecord API will continue to return ALL records with the transaction ID.
  • First drafts of tokenCreate, tokenUpdate, tokenDelete, tokenTransfer, tokenFreeze, tokenUnfreeze, tokenGrantKyc, tokenRevokeYc, tokenWipe, and getTokenInfo HAPI operations. #505 and #522

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v0.7.0

MAINNET UPDATE COMPLETED: SEPTEMBER 8, 2020
TESTNET UPDATE COMPLETED: AUGUST 20, 2020
In Consensus Node v0.7.0, we’ve moved to Swirlds SDK release 0.7.3 which enables zero-stake nodes to be part of a network without affecting consensus. Consensus Node v0.7.0 migrated to new interfaces and methods provided in this version of the Swirlds SDK. HCS topic running hashes are now calculated including the payer account id. The release includes other minor fixes and improvements. Enhancements
  • Migrate to Swirlds SDK release 0.7.3 with appropriate settings and logging configurations #347, #427
  • Update HCS topic running hash to include the payer account id #88
  • Add zero-stake node functionality #274
  • Add new stats for the average size of HCS submit message transactions that got handled and for counting the number of platform transactions not created per second #316, #334
  • Change gRPC CipherSuite to be CNSA compliant #215
  • Make recordLogPeriod dynamic with a default of 2 seconds #315
  • Add record with 3-min expiry to effective payer account after handling transaction #348
  • Enhancements for going open source #378, #379
Documentation changes
  • Clarify interpretation of response codes UNKNOWN and PLATFORM_TRANSACTION_NOT_CREATED #314, #394
Bug fixes
  • Prevent CryptoCreate and CryptoUpdate transactions from giving an account an empty key #58, #60
  • Fix incorrect submitted smart contract transactions count #371
  • Validate total ledger balance before starting up Services #258
  • Add a new rolling file to log all queries with controlled maximum rate #59
  • Other minor bugs #373

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v0.6.0

MAINNET UPGRADE COMPLETED: AUGUST 6, 2020
TESTNET UPGRADE COMPLETED: JULY 16, 2020
In Consensus Node v0.6.0, we’ve enhanced the Hedera Consensus Service by supporting HCS Topic Fragmentation. We added, into the ConsensusSubmitMessageTransactionBody, an optional field for the current chunk information. For every chunk, the payer account that is part of the initialTransactionID must match the Payer Account of this transaction. The entire initialTransactionID should match the transactionID of the first chunk, but this is not checked or enforced by Hedera except when the chunk number is 1. Enhancements
  • Add support for HCS Topic Fragmentation
Documentation changes
  • Protobuf v0.6.0 with HAPI doc update to support HCS Topic Fragmentation

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v0.5.8

MAINNET UPGRADE COMPLETED: JUNE 18, 2020v0.5.8 includes all of the updates found in v0.5.0
TESTNET UPGRADE COMPLETED: JUNE 8, 2020
Version 0.5.8 includes a patch which addresses the resilience of peer-to-peer networking in the hashgraph consensus platform.

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v0.5.0

TESTNET UPGRADE COMPLETED: MAY 5, 2020
In Consensus Node v0.5.0, we’ve added TLS for trusted communication with nodes on the Hedera network. For better security, only TLS v1.2 and v1.3 with TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 and TLS_RSA_WITH_AES_256_GCM_SHA384 cipher suites are allowed. We’ve added new metadata in the Hedera NodeAddressBook, accessible in system file 0.0.101. The versions of the node software and gRPC Hedera API (HAPI) are now queryable via GetVersionInfo under the new NetworkService for node and network-scoped operations. For Hedera Consensus Service, we’ve updated the topic running hash calculation to use the SHA-384 hash of the submitted message, rather than the message itself. This reduces the storage requirements needed to validate the hash of a topic. The record of a ConsensusSubmitMessage transaction that uses the new hashing scheme will have a new topicRunningHashVersion field in its receipt. The value of the field will be 2. Hedera File Service also has several fixes of note. First, we enabled immutable files. Second, we relaxed the signing requirements for a FileDelete transaction to match the semantics of a revocation service. Third, we fixed a fee calculation bug that overcharged certain FileUpdate transactions. For Hedera Smart Contract Service, we’ve improved visibility into transactions that create child contracts using the new keyword by putting created ids in the record of the transaction; and we now propagate parent contract metadata to created children. Finally, if you use the throttle properties in system file 0.0.121 to estimate network performance limits, you will also be interested in a new standardized format of those properties. The lists below contain these and other minor updates, bug fixes, and documentation changes. Enhancements
  • Add support for TLS
  • Expand address book metadata
  • Return all created contract ids
  • Propagate creator contract metadata
  • Introduce GetVersionInfo query
  • Standardize throttle configuration
  • Enforce file.encoding=utf-8 on startup
  • Make duration properties inclusive for readability
Bug fixes
  • Use message SHA-384 hash in running hash
  • Enable immutable files
  • Relax FileDelete signing requirements
  • Fix sbh calculation in FileUpdate
  • Return metadata for deleted files
  • Enforce receiver signing requirements during contract execution
  • Reject invalid CryptoGetInfo
  • Reject CryptoCreate with empty key
  • Return NOT_SUPPORTED for state proof queries
  • Waive fees for 0.0.57 updating 0.0.111
  • Waive signing requirements for 0.0.55 updating 0.0.121/0.0.122
  • Waive all fees for 0.0.2
  • Do not throttle system accounts
Documentation changes
  • Replace “claim” with “livehash” as appropriate
  • Standardize and clarify HAPI doc

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v0.4.1

  • Software update includes the ability for Hedera to dynamically set throttles on network transaction types.
  • The following throttles would be updated to: 1000 submit messages per second and 5 topic creates per second.
  • Reassigning of new Council Member nodes

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v0.4.0

  • Say hello to the Hedera Consensus Service! This release is the first to include HCS, allowing verifiable timestamping and ordering of application messages.
  • Network pricing has been updated to include HCS transactions and queries
  • Network throttle for HCS set to 1000 tps for submitting messages, and 100 tps for each of the other HCS operations.
  • Improved end to end testing.
  • General code clean up and refactoring.
  • ContractCall - TransactionReceipt response to ContractCall no longer includes the contractID called
  • CryptoUpdate - TransactionReceipt response to CryptoUpdate no longer includes the accountID updated
  • CryptoTransfer – CryptoTransfer transactions resulting in INSUFFICIENT_ACCOUNT_BALANCE error no longer list Transfers in the TransactionRecord transferList that were not applied

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Miscellaneous

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SDKs

  • Java SDK has been updated to support the Hedera Consensus Service
  • JavaScript/Typescript SDK has reached version 1.0.0, supporting all four mainnet services
  • JavaScript/Typescript SDK supports both running in the browser (with Envoy Proxy) and in Node.
  • Go SDK now supports all four mainnet services.
Fees
  • Transfer list within transaction records now shows only a single net amount in or out for each account, reflecting both transfers and any fees paid.
  • Fixed bug in fee schedule that had resulted in fees for ContractCallLocal, ContractGetBytecode, and getVersion queries being undercharged by ~33%
  • You may get more information regarding transaction record fees here.

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SDK Extension Components

  • The Hedera SDK Extension Components (SXC) is an open sourced set of pre-built components that aim to provide additional functionality over and above HCS to make it easier and quicker to develop applications, particularly if they require secure communications between participants.
  • Components use the Hedera Java SDK to communicate with the Hedera Consensus Service.
  • Learn more about Hedera SXC here.