Introduction

What is IRON Vault?

IRON Vault repurposes an old Android phone as a BLE hardware wallet. From the perspective of a host app like OKX Wallet or MetaMask, it behaves identically to a Ledger Nano X — communicating over Bluetooth using the same GATT profile and APDU protocol.

Key Capabilities

• Ethereum HD key derivation (BIP-44, m/44'/60'/0'/0/i)
• Solana HD key derivation (SLIP-10 Ed25519, m/44'/501'/0'/0')
• BLE peripheral mode with exact Ledger GATT UUIDs
• Transaction signing with on-device confirmation UI
• Mnemonic backup and PIN protection

This Site

This DevTools site provides:

1. Documentation — Full protocol reference for developers integrating with IRON Vault
2. APDU Debugger — Send commands to the simulator or a real device and inspect responses
3. Wallet Simulator — A live software simulator that responds to APDU commands in real-time

Use the APDU Debugger (link in the sidebar) to explore the protocol interactively.