Technical Articles

Dark isometric illustration of a signing machine seen from a raised corner: ranks of interlock stations with red locking bars and one empty socket, a teal engraved notch-plate lit under glass on a reading stand, a different red-inked notch-plate clamped in the press bed directly below it, and a cropped gloved hand sliding a second brass plate into the open station

Ledger's Clear Signing Race: One Extra APDU Could Swap the Transaction You Approved

Ledger shipped twenty-one fixes in Ethereum app 1.22.2 under a two-word changelog line. The git history shows what they closed: a second command could replace the transaction behind the screen.

Dmitry Serdyuk·Aug 25, 2026

Smart contract audit preparation checklist

technical

Smart Contract Audit Checklist: What to Prepare Before Your Engagement

The preparation checklist that separates smooth audit engagements from costly delays. What your team needs to have ready before auditors touch your code.

Dmitry Serdyuk·Mar 20, 2026