Off-Ramp via Radio Relay

🔄 Stripe Off-Ramp via Radio Relay (Operator-Verified Path)

📡 Scenario:

  • Operator in a disconnected zone wants to off-ramp BTC/USDT → USD into a bank
  • They broadcast the off-ramp request via radio (FT8 or packet)
  • A trusted, internet-connected validator node receives and relays the request securely to Stripe

🔧 System Flow

1. Operator Wallet:

  • Operator signs an off-ramp transaction
  • Contains:
    • Amount (e.g., 0.0001 BTC)
    • Destination (e.g., Bank of America via Stripe)
    • Wallet signature
    • Call sign and timestamp
  • Transaction is then:
    • Sent via FT8 to a known validator
    • OR logged locally and handed off via USB (if radio fails)

2. Validator Node:

  • Receives TX → Verifies:
    • Signature
    • Balance
    • Region (U.S. + allies only)
    • Valid off-ramp destination
  • Uses pre-configured Stripe API key to submit:
    • A payout to the operator’s linked account
    • Logs tx on-chain or IPFS if needed

3. Confirmation Path:

  • Optional radio-based response:
    • “Off-ramp confirmed: 0.0001 BTC → USD sent to xxxx1234”
  • Could be queued for next FT8 cycle or USB token return

🔒 Why This Is Secure

LayerSecurity Mechanism
Operator SignatureBIP39 keypair (cold wallet OK)
TX VerificationValidator node with OTA + Stripe link
Region LockOnly allowed for verified U.S.-based operators
Broadcast ProtectionFT8 signed, optionally encrypted
Stripe Relay APIWallet-signed, validator-verified only

🛠 Additional Enhancements

  • Relay fee taken from OTA balance
  • Smart contract escrow to prove intent before fiat release
  • Multi-sig mode for validator quorum on high-value TXs

✅ Result:

We now have an SDR-powered, air-gapped way to access fiat banking services without ever logging into the internet — as long as a trusted node with Stripe connectivity exists somewhere on the network.