Reference

• basic-api/ – Definitions for CryptoHDKey, CryptoCoinInfo, and CryptoKeypath used when decoding QR payloads.

• ethereum-and-evm/ – Examples for EthSignRequest, EthSignature, and other EVM‑centric offline signing flows.

Pair this reference with the Quick Start for end‑to‑end integration:

• Air‑Gap Quick Start

Tip: Study basic-api before implementing scanning/decoding to ensure correct parsing.

Note on Tron: Tron Air‑Gap helpers live in our QR wallet SDK and follow the same UR patterns; see Tron Quick Start for usage.

Packages

• Use Keystone official packages: @keystonehq/keystone-sdk, @keystonehq/bc-ur-registry*

• UR primitives: @ngraveio/bc-ur