AvianNetwork/Avian v4.2.0 on GitHub

This is the general availability release of Avian Core 4.2.0 – Longbottom Leaf, focused on modernization, performance, and wallet usability.

Highlights

Modernized Qt and dependencies
- Qt upgraded from 5.7.0 → 5.12.11 (LTS)
- Updated depends stack to current, secure versions
- Improved multi‑platform CI/CD (Windows, Linux, macOS, ARM64, ARM32)
Consensus and network
- Protocol version bump (4.1+ only) to keep the network consistent and avoid slow, legacy peers
- getblocktemplate updated for better BIP22 compliance
- Added NetworkUpgrade struct and use chain‑specific params for PoW hash
New UTXO consolidation system
- New RPC: consolidateutxos <address> [min_utxos] [max_batches] [min_amount] [max_amount]
- New Qt dialog: “Consolidate UTXO Transactions” with configurable limits, real‑time stats, progress, and cancellation
- Greatly improves performance for wallets with many small outputs
GUI and UX improvements
- Faster, more responsive startup and splash screen
- Splash remains visible with real‑time progress and RC/Version info
- Defer network initialization to speed GUI construction
- UTXO consolidation runs in the background (no UI freezing)
RPC additions and wallet tools
- New RPCs:
  - getblockstats – block‑level stats and developer fee tracking
  - getnodeaddresses – list known peer nodes
  - getindexinfo – status of active indexes
  - listwatchonly – list watch‑only addresses
  - removewatchonly – remove watch‑only addresses
- Added powhashcache information to help and diagnostics

4.2.0 is compatible with 4.1+; older nodes should be upgraded before connecting.
As with any core upgrade, back up your wallet (wallet.dat) before installing.