Version 1.4.2.0 HOTFIX MANDATORY UPDATE

TLDR for the TLDR

The crisis is over. The prodigal sons have returned, and the wallet will simply sync as normal. As a precaution, check the block height (on explorer.veil-project.com) and only run the later described command if your old wallet is stuck and won't sync.

TLDR—

While there were many improvements ready for this update since v1.4.1.0 the
URGENT prompt that prompted this release at this time was an exploit on the 28th of June, 2026 where invalid Veil was created in Stealth (CT) funds, which stalled the chain for many hours.

The entire chain was then scanned and eight "poisoned" blocks were identified, the first of which was at block height 3890103 with the now invalid block ID of 913780c878021677e2c5fc471016c8db5e1acf5e705ed48c413525bff85009fc.

Because of this, if you have synced beyond the height 3890103 before the Veil core wallet builds on June 28th, 2026, then you need to manually invalidate the block in the Debug Console or the command line interface (or Terminal) with

invalidateblock 913780c878021677e2c5fc471016c8db5e1acf5e705ed48c413525bff85009fc

The wallet updated builds were made available the same day from the Github Actions tab, but, and I profusely apologise, in the rush, it was not placed here in the Releases section!

Steps to install this upgrade

• 1. Either in the old wallet before shutting down or in the new wallet after startup
  • invalidateblock 913780c878021677e2c5fc471016c8db5e1acf5e705ed48c413525bff85009fc
    • Note, that the official snapshots on veil.tools also will fix this, but this command saves an unnecessary download of many GigaBytes of data and a more complicated process.
  • Wait until the command completes.
  • If you are on the old wallet,
  • clearmempool # this removes unconfirmed transactions from the memory pool
  • clearbanned # this unbans good chain peers so you can sync the new wallet
    • Good (or the canonical) chain peers may have you banned for up to 24 hours! Using a different IP address, if possible, may make your next sync faster, or try to sync from another local wallet computer that is on the good chain.
  • stop the wallet.
• 2. Install this wallet v1.4.2.0
  • Choosing the appropriate binaries for your operating system and computer architecture, such as commonly,
    • macOS → macosx-binaries
    • Linux / Ubuntu → x86_64-linux-binaries
    • Windows → win64-binaries
  • Copy the binaries over top of the old ones, (such as by dragging and dropping from inside the mounted macOS DMG into the Applications folder, or unzipping the Windows or Linux ones and dropping them into the folder where the old ones are).
• 3. On start up it will synchronise blocks from whichever other peers are on the network.
• 4. If you have transactions since or on June 28th 2026 on the rejected chain you may need to
  • rescanblockchain 3890102
  • Do any related accounting as a matter of urgency.

What's Changed

• [Github actions] RISCV64 by @steel97 in #1036
• Fixed build by @steel97 in #1038
• [Github actions] Updated actions by @steel97 in #1042
• Fix compilation under gcc 13 by @philmb3487 in #1039
• Enhanced FAQ Section: Updated Staking, Mining, and General Guidance by @ohcee in #1043
• Upgrade GitHub Actions Ubuntu runners from 20.04 to 22.04 by @ohcee in #1049
• Light Wallet Upgrades, Ubuntu 24 Support by @blondfrogs in #1047
• Fix macOS CI build issues (libtinfo + fcommon) by @ohcee in #1050
• Batch Zerocoin Database Write to Improve Sync Speed by @ohcee in #1051
• Fix/bech32 address handling by @ohcee in #1059
• Fix/spendzerocoinmints help 1045 by @ohcee in #1058
• Zerocoin sync optimization by @ohcee in #1056
• CI: update GitHub Actions to v5/v6/v7 for native Node.js 24 support by @ohcee in #1061
• Reject stealth and RingCT coinbase outputs after rollback height by @nik343 in #1062

New Contributors

• @nik343 made their first contribution in #1062

Full Changelog: v1.4.1.0...v1.4.2.0

20260716: Uploading the PGP key used to sign these. Thanks to the person who alerted me that I hadn't included it in this release.

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