sub0 Asia 2024 - Juan Leni (Zondax)
summary
A new Ledger generic app bundles merklized metadata (Merkle root + per-transaction proofs) so the hardware wallet signs a blob that includes a verified type-root the node checks, preventing a compromised host from tricking the device; demo on polkadot-js with a Poo testnet transfer shows chain name, SS58-encoded destination and balances transfer rendered correctly on-device. Design targets tiny devices with 4 KB RAM, avoids frequent app upgrades, adds a Migration app for derivation-path recovery, and estimates ~6–8 weeks after RFC 78 and runtime sign-extension land.
AI-written summary · about
chapters (12)
- 0:00Verifiable metadata effort
- 1:08Verifiable metadata importance
- 3:14Verifiable metadata for Polkadot
- 4:41Technical workings
- 6:06Implementation challenges
- 7:31RFC 78 role
- 8:56Wallet integration migration
- 11:03Runtime upgrade needs
- 12:29Ledger app process
- 13:54Migration strategy
- 15:21Demo walkthrough
- 20:39Q&A
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