Defcoin Core Nu v26.6.8-alpha

Alpha prerelease candidate for Defcoin Core Nu.

This rollup covers the Nu app work since the published v26.3.1 Nu wallet release. The newer cpuminer-opt-v26.1-defcoin GitHub release is a helper-binary release, not the Nu wallet baseline.

Current Platform Builds

• Tahoe / Apple Silicon: Defcoin-Core-Nu-v26.6.8l-alpha-macOS-AppleSilicon-Tahoe.dmg
• Windows 11 x86_64: Defcoin-Core-Nu-v26.6.8e-alpha-Windows-11-x86_64-Setup.exe and Defcoin-Core-Nu-v26.6.8e-alpha-Windows-11-x86_64-Portable.zip
• OS X Lion 10.7: Defcoin-Core-Nu-26.6.8-alpha-osx107.dmg

Highlights

• Adds and hardens modern wallet workflows: Wallets management, recovery phrase creation/restore, optional SQL descriptor recovery, passphrase quality feedback, passphrase visibility controls, wallet stats columns, watch-only address tooling, message-signing guidance, selectable inspection text, and a restored Debug Log surface.
• Adds the Paper Wallet workflow with local key/address derivation, BIP38 handling, print/preview controls, Atkinson Hyperlegible Mono key rendering, entropy safeguards, and release-gated Design 1 output.
• Improves send reliability around depleted keypool/change-address errors by allowing Nu to refill the keypool and retry when the backend reports that a change address cannot be generated.
• Improves shutdown and relaunch behavior by keeping shutdown progress visible while backend processes are still exiting.
• Updates peer, seed, traceroute, and diagnostics behavior for the current Defcoin network: August 1, 2026 defcoin-only magic enforcement date, dc903 default-port seed migration, DNS seed source attribution, IPv6 seed display, Trippy non-scrolling output mode, Atkinson Hypermobile Mono traceroute font, and clearer peer inspection/copy behavior.
• Refreshes Nu branding: locked DEFCOIN / CORE NU logo ratios, corrected splash/About/navigation lockups, updated Tahoe-style app icons, and cleaned DMG artwork.
• Improves update and packaging behavior across macOS and Windows staging, including Velopack-aware update checks, Windows child-process containment, clearer fallback installer handling, and release metadata consistency.
• Carries forward Fast Sync and Quick Clone hardening from the 26.6.x line: Core validation remains authoritative, UDP is treated as transport, ACK and reservation accounting is clearer, and UI metrics distinguish TCP, UDP, and fallback paths.
• Adds the Tahoe Mining > Benchmark Pools workflow and iterates it through 26.6.8l-alpha: editable pool presets, per-pool payout/password inheritance, built-in endpoint latency probes, selectable/sortable benchmark tables, fairer accepted share-difficulty work/s scoring, corrected .fun pool software labeling as UNOMP, improved table range selection, drag-to-reorder feedback, and branded 1920x1080 benchmark PNG output with average overlays and diagnostics sidecars for longer runs.

Known Issues / Experimental Features

• Quick Clone is experimental and not fully working yet. Discovery, source selection, and request/response handling can still fail or stall on some LAN setups.
• UDP Fast Sync is experimental and not fully working yet. Core/TCP remains the authoritative fallback and may still win or dominate block delivery while UDP diagnostics continue.
• Mining Pool Benchmarking is experimental. Treat generated comparisons, saved charts, and accepted-work scores as diagnostic output until more pool/miner validation is complete.

Verification

• Tahoe Apple Silicon 26.6.8l-alpha app metadata and bundled tools report v26.6.8l-alpha.
• Tahoe Apple Silicon 26.6.8l-alpha app passes codesign --verify --deep --strict.
• Tahoe Apple Silicon 26.6.8l-alpha DMG passes hdiutil verify.
• Tahoe Apple Silicon 26.6.8l-alpha checksum is published in SHA256SUMS-v26.6.8l-alpha.txt and appended to SHA256SUMS.txt.
• Windows setup/portable artifacts are not Authenticode-signed in this alpha because no Windows signing parameters were provided during local packaging.

SHA256

See SHA256SUMS-v26.6.8l-alpha.txt for the newest Tahoe / Apple Silicon candidate. The aggregate SHA256SUMS.txt remains attached for existing release assets.

cpuminer-opt v26.1 Defcoin helper binaries

Defcoin helper binaries for cpuminer-opt v26.1.

• macOS Apple Silicon: locally built from JayDDee/cpuminer-opt tag v26.1, commit b34565bfaca5da9ed894a326e3ba0dfe459550a4. Bundles libjansson and libgmp next to the executable.
• Windows x86_64: upstream JayDDee release asset mirrored for convenience; SHA-256 matches GitHub's published release digest.

These miner binaries are optional. Defcoin Core Nu does not bundle miners; use the Mining page to select a miner executable you trust and generate the scrypt stratum command.

Upstream project: https://github.com/JayDDee/cpuminer-opt
Upstream release: https://github.com/JayDDee/cpuminer-opt/releases/tag/v26.1

Defcoin Core Nu 26.3.1 "Core Memories"

Defcoin Core Nu 26.3.1 Release Notes

Codename: Core Memories

Defcoin Core Nu 26.3.1 is a cleanup release for the current Nu desktop
wallet line. It keeps the 26.3.0 network, wallet, peer-magic, and
User-Agent filtering behavior while reducing packaged Nu assets to the files
the Qt Quick shell actually uses.

Notable release changes:

• Runtime asset staging now copies an explicit allowlist of Nu icons and brand
  assets instead of the whole asset directory.
• Unused Nu image drafts, duplicate icon outputs, and Finder metadata were
  removed from source and packages.
• Build notes and release-facing documentation were tightened to describe the
  current release only.

Technical details are maintained in
doc/defcoin-core-nu-technical-guide.md.

Optional bootstrap pack:

• Defcoin-bootstrap-mainnet-2332283.zip is an optional block import pack for users who want to speed up first sync.
• Snapshot height: 2,332,283; best block hash: 5c5c925594fab481d69096fee7fadf35784ba0bd590804cc9314a81b86aa084e.
• ZIP SHA-256: d8eda60bb38ac65006d3f0df0e3a7b11713ee6751d5bf080cfc00b644b95ae1c.
• The archive includes bootstrap.dat, macOS and Windows import scripts, install instructions, and per-file checksums.

Legacy Mac OS X 10.7.5 Lion Intel builds:

• Defcoin-Core-Nu-v26.3.1-macOS-10.7-Lion-Intel.dmg is the validated classic Defcoin Core / standard Qt wallet reference build for Lion-era Intel Macs.
• Defcoin-Core-Nu-v26.3.1-macOS-10.7-Lion-Intel-NuUI.dmg is the optimized Lion-compatible Nu UI build. It uses a Qt 5.5 Widgets shell that mirrors the Nu navigation and status surface while keeping backend wallet, signing, validation, and peer logic inside bundled defcoind.
• Defcoin-Core-Nu-v26.3.1-macOS-10.7-Lion-Intel-DC34.dmg is the Lion-compatible DC34 Edition build, packaged as Defcoin Core Nu DC34 Edition.app with the DC34 theme resources included.
• The Nu UI Lion image was optimized by stripping local Mach-O symbols, copying only the runtime Nu shell assets, and removing the direct QtNetwork dependency from the UI shell.
• All three Lion images were verified on Mac OS X 10.7.5. The optimized Nu UI and DC34 apps were launched from mounted DMGs on the Lion machine; Tahoe was used only where faster DMG metadata assembly made sense.
• Checksums for all Lion artifacts are included in SHA256SUMS.txt.

Defcoin Core Nu 26.3.0 "Core Memories"

Defcoin Core Nu 26.3.0 Release Notes

Codename: Core Memories

Defcoin Core Nu 26.3.0 is a full-node Defcoin desktop wallet derived from
Litecoin Core v0.21.5.5. It keeps the Litecoin-derived Defcoin backend and
adds a Qt Quick desktop interface, bundled backend launch management, startup
diagnostics, receive-request history, transaction detail actions, PSBT tools,
peer diagnostics, dual-magic migration controls, and stricter Defcoin
peer/address hygiene.

Notable release changes:

• Current release identity: 26.3.0 Core Memories.
• Defcoin-specific mainnet magic support: preferred defc014e with temporary
  compatibility for legacy fbc0b6db.
• Peer User-Agent filtering: accepted Defcoin peers must begin with
  /Defcoin.
• Address-gossip filtering: non-Defcoin legacy peers are disconnected before
  their address gossip is accepted or rebroadcast.
• Diagnostics: simple and detailed peer views, actual per-peer magic, compact
  service flags, traffic charts, log viewing, and console access.
• Receive flow: generated request history and request management.
• Settings: Defcoin-only magic controls, launch/network options, wallet safety
  actions, About, and build notes.

Technical details are maintained in
doc/defcoin-core-nu-technical-guide.md.