FastPay ⚡

Tap-to-pay crypto payments in under 10 seconds.

Problem

Current crypto point-of-sale systems are broken:

• Customer scans QR code
• Manually enters payment amount
• Calculates gas fees
• Merchant typically reconciles offline

Result: Nobody uses crypto for coffee.

Solution

Make crypto payments work like Google/Apple Pay:

1. Merchant enters amount on terminal
2. Terminal creates charge via Coinbase Commerce
3. Customer scans QR OR taps phone (both work)
4. Wallet opens with payment details pre-filled
5. Customer approves with one tap
6. Confirmed on-chain in <10 seconds

Result: Feels like Google/Apple Pay. Costs like crypto.

How NFC Improves UX

The NFC tap is a convenience feature that provides the same UX as credit card terminals:

• Customer taps phone → Terminal detects tap → Associates with pending charge
• Customer's wallet app opens payment page (same as QR scan)
• Both paths lead to same Coinbase Commerce hosted checkout
• No data transferred via NFC - just tap detection for UX

Tech Stack

• NFC Hardware: PN532 module in reader mode (tap detection)
• Payment Processing: Coinbase Commerce (charge creation, hosted checkout, webhooks)
• Blockchain: Base L2 (fast, cheap settlement)
• Token: USDC (stable, no volatility)
• Terminal: Node.js (business logic) + Python (NFC hardware bridge)
• Customer App: Any wallet with Base L2 support (MetaMask, Coinbase Wallet, etc.)

Status

🚧 In Development (Week 2 of 12)

Phase 1 progress - Building terminal software:

• Hardware setup (PN532 NFC module + USB-UART converter)
• NFC communication working (Adafruit library, firmware v1.6 detected)
• Phone tap detection tested (reader mode validated)
• Architecture finalized (reader mode + Coinbase Commerce)
• Terminal software (Node.js + Python bridge)
• First payment completed on Base testnet
• Merchant pilot (3 locations)

Follow the build: @pxaxm.base.eth or @pcdkd

Why This Matters

For Merchants:

• 0.01% fees (vs 3% for credit cards)
• Instant settlement (vs 2-7 days)
• No chargebacks
• Global payments (no forex fees)

For Customers:

• Fast end-to-end process (10 seconds vs 60+ seconds)
• Familiar UX (tap like a credit card)
• Self-custodial (no middleman)
• Works with existing wallets (MetaMask, Coinbase Wallet)

Roadmap

• Phase 1 (Weeks 1-4): Desktop terminal POC
• Phase 2 (Weeks 5-8): Merchant pilots + POS integration
• Phase 3 (Months 3-6): Phone dongle ($25 plug-in device)
• Phase 4 (Months 6-12): Custom hardware at scale

Get Involved

This is an open-source project. Contributions welcome.

• Merchants: Want to pilot? DM me
• Developers: Star the repo, issues coming soon
• Investors: Not happening

License

License

MIT. Fork it, improve it, deploy it.

If you're building something similar, I'd love to collaborate.

Commercial partnerships available for:

• White-label terminal deployments
• POS system integrations
• Custom hardware manufacturing

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Making crypto payments work IRL. Built on Base.