KeepKey Vault v11

Desktop hardware wallet application built with Electrobun (Bun main process + system WebView) + React 18 + Chakra UI 3.0.

Architecture

Electrobun Desktop App
├── Main Process (Bun) ──── USB (HID + WebUSB) ──── KeepKey Device
│   ├── Engine Controller (device lifecycle, USB events)
│   ├── SQLite persistence (bun:sqlite)
│   ├── Pioneer API integration (balance/portfolio)
│   └── REST API on port 1646 (opt-in, KEEPKEY_REST_API=true)
└── WebView (React 18 + Chakra UI 3.0 + Vite)
    └── Tab-based state machine (dashboard | addresses | settings)

• The vault talks directly to the KeepKey device via USB -- no external desktop app dependency.
• All device operations go through Electrobun RPC (no REST required for normal use).
• The REST API on port 1646 is opt-in (KEEPKEY_REST_API=true), compatible with the kkapi:// protocol.
• No React Router -- the UI uses a simple tab-based state machine.
• Theme: black/gold (#000/#111/#FFD700) matching KeepKey branding.

Prerequisites

• Bun >= 1.3.5
• Yarn (for hdwallet monorepo build)
• KeepKey hardware wallet connected via USB
• For signing/notarization: Apple Developer ID certificate + Xcode CLI tools

Quick Start

make vault      # Build modules + install deps + run dev mode
make dev        # Build and run in dev mode
make dev-hmr    # Dev mode with Vite HMR

Make Targets

Target	Description
make vault	Build modules + install deps + run dev mode
make dev	Build and run in dev mode
make dev-hmr	Dev mode with Vite HMR
make build	Development build (no signing)
make build-signed	Full pipeline: build, prune, DMG, sign, notarize
make prune-bundle	Prune app bundle (version-aware dedup + re-sign)
make dmg	Create DMG from existing build
make upload-dmg	Upload signed DMG to CI draft release
make release	Build, sign, and create new GitHub release
make modules-build	Build hdwallet + proto-tx-builder from source
make audit	Generate dependency manifest + SBOM
make clean	Remove all build artifacts

Project Structure

keepkey-vault-v11/
├── Makefile
├── modules/
│   ├── hdwallet/                   # Git submodule: keepkey/hdwallet (yarn+lerna)
│   ├── proto-tx-builder/           # Git submodule: @keepkey/proto-tx-builder
│   ├── keepkey-firmware/           # Git submodule: device firmware (C, CMake)
│   └── device-protocol/           # Git submodule: protobuf definitions
├── docs/
│   ├── ARCHITECTURE.md
│   ├── COIN-ADDITION-GUIDE.md
│   ├── coins/
│   └── firmware/README.md
├── firmware/                       # Firmware manifest + binaries
└── projects/
    └── keepkey-vault/              # Electrobun app
        ├── electrobun.config.ts
        ├── vite.config.ts
        ├── entitlements.plist
        ├── scripts/                # Build scripts (collect-externals, prune, etc.)
        ├── docs/                   # BUILD.md, API.md, ELECTROBUN.md
        └── src/
            ├── bun/                # Main process
            │   ├── index.ts        # Electrobun RPC + engine controller + REST
            │   ├── engine-controller.ts  # USB event-driven device lifecycle
            │   ├── rest-api.ts     # Bun.serve() REST API (opt-in)
            │   ├── evm-rpc.ts      # EVM chain RPC calls
            │   └── ...             # DB, Pioneer, TX builder modules
            ├── shared/
            │   ├── rpc-schema.ts   # Electrobun RPC type definitions
            │   ├── types.ts        # DeviceStateInfo, FirmwareProgress, etc.
            │   └── chains.ts       # Chain definitions
            └── mainview/           # React frontend
                ├── main.tsx        # React entry + ChakraProvider
                ├── App.tsx         # Tab-based state machine (no router)
                ├── components/
                │   ├── Dashboard.tsx
                │   ├── Addresses.tsx
                │   ├── TopNav.tsx
                │   ├── SplashScreen.tsx
                │   ├── OobSetupWizard.tsx
                │   ├── DeviceSettings.tsx
                │   └── device/     # PinEntry, PassphraseEntry, RecoveryWordEntry
                ├── hooks/          # useDeviceState, useFirmwareUpdate, etc.
                └── lib/            # rpc.ts (browser-side RPC transport)

Supported Chains

• Bitcoin: Multi-account, SegWit (p2wpkh, p2sh-p2wpkh, p2pkh)
• Ethereum + 6 EVM L2s: Polygon, Arbitrum, Optimism, Avalanche, BSC, Base
• Cosmos ecosystem: Cosmos, THORChain, Osmosis, Mayachain
• Other: Ripple (XRP), Binance (BNB), Solana
• Custom EVM chains: User-defined via Add Chain dialog

Tech Stack

• Runtime: Electrobun (Bun + system WebView)
• UI: React 18 + Chakra UI 3.0
• Build: Vite 6
• Device communication: @keepkey/hdwallet-* (HID + WebUSB dual transport with automatic fallback)
• Persistence: SQLite (bun:sqlite)
• Signing: Apple codesign + notarize + staple

Documentation

• Build and Signing Guide
• REST API Reference
• Electrobun Integration
• Architecture
• Coin Addition Guide

Submodules

After cloning, initialize the git submodules:

git submodule update --init --recursive

The modules/hdwallet/ submodule must be on the master branch (which has lodash/rxjs removed from source). Build with:

make modules-build

This builds proto-tx-builder (bun + tsc) then hdwallet (yarn install + yarn build).