Tracking snapshot: Iroha v2 (2.0.0-rc.3 milestone)

[s8sato]

Purpose

This issue documents the implementation status of Iroha v2 as of commit 884f870.
It provides a clear view of the current milestone status—covering both implemented and ongoing work—so that the baseline remains reproducible, traceable, and informative for future iterations.

Snapshot metadata

• Milestone: 2.0.0-rc.3

• Reference commit: 884f870

• Docker image: hyperledger/iroha:2-snapshot-2025-10

  docker pull hyperledger/iroha:2-snapshot-2025-10

• Total issues: 37 (excluding sub-issues)

• Categories:

  • Open – feature issues
  • Open – non-feature issues
  • Closed issues

Open – feature issues

Core functional items still in progress or planned for the next incremental release.

• Research transaction fees #1177
• Introduce a set of waiting peers #1225
• Refactor Execution Cycle #5356
• feat: generic structure through execution cycle #5355
• Include the transaction hash in data events #5250
• Record Wasm trigger executions for auditing #5522
• Query permissions (Visibility Control 1) #5338
• Event subscription permissions (Trigger Safety 2-A / Visibility Control 2) #5439
• Quota-based economic deterrence (Trigger Safety 3) #5440
• Account aliases (for recovery?) #4372
• Guardian scheme for account recovery #5486
• Private validators (hub-chain as a cross-border tx solution) #4637
• Client-side block header validation to support Merkle proofs #5498
• Add technical account that will receive network fees #5315
• Permissionless accounts: registration-free model #4426
• Address dynamic IP addresses without requiring a restart with new configuration #5351
• Integrated webhook support for transaction events #5477

Open – non-feature issues

Maintenance and improvement tasks that can be addressed after release, including bug fixes, performance tuning, documentation updates, and security hardening.

• api-changes Data integrity in World #4672
• api-changes Namespace dimension vs. lightweight IDs #5361
• api-changes Replace public keys with those compressed #5280
• api-changes Deny external access to non-personal accounts #5022
• api-changes Register and call Wasm instructions #5147
• api-changes Registrable permissions #5359
• api-changes Pipeline triggers: re-evaluate the necessity and safety #5512
• Size limits for individual instructions or entire transactions #5342
• Performance degradation in executor for permission check #4756
• Ensure every execution path goes through the executor #5442
• Reintroduce topology shuffling to restore fault tolerance #5495
• Verify that features are additive #5416
• Transactional queries execution context #5171
• Stateful communication protocol and initialization handshake #2112
• DAG-based consensus #5375

Closed issues

Changes already merged but not yet included in a tagged release.

• Consensus hash should reflect the validation outcome #5473
• Record trigger execution as a transaction #4968
• Data triggers should inherit origin authorities (Trigger Safety 2-B) #5441
• Per-transaction triggers #4937
• Trigger that fires too often #5232

State of Iroha JavaScript SDK

A pre-release version of Iroha JS supporting 884f870 (as clearly seen here) is available at the current main (https://github.com/hyperledger-iroha/iroha-javascript/tree/c7fad03a54e2317ccf63f9960c7bfe198a2e9f3d) and is published on JSR:

• https://jsr.io/@iroha/core@0.5.0-alpha
• https://jsr.io/@iroha/client@0.5.0-alpha-1

SDK API changes are briefly documented in the relevant PR:

• feat!: support post-2.0.0-rc.2.0 Iroha iroha-javascript#263