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NFC Crypto Kit

Card-Confirmed Wallet

  • Flutter
  • Version 1.0.0
  • Payments and tokens

NFC Crypto Kit is the complete source code for a physical-card crypto product under your brand. In NFC Crypto, a self-custody wallet for EVM networks, Solana and Bitcoin, a paired NFC card opens the app and confirms every payment; cards have Owner, Backup or Spender roles, Spender cards have daily limits per network, a customer gets paid by tapping their card, and the recovery phrase can be saved on the card, locked with a PIN.

Features

  • NFC card confirms every signature (EVM, Solana, Bitcoin, WalletConnect)
  • Card gate: require the card to open the app, for transactions, or both; 72-hour lost-card switch-off checked against network time
  • Card roles Owner / Backup / Spender
  • Spender daily limits per chain (rolling 24h, native coin, enforced by the app on this phone)
  • Tap to pay / share address: public receive addresses on the card (record mikodes.com:nfcaddr), 'Tap recipient's card' in Send
  • PIN-encrypted seed backup on the card (record mikodes.com:nfcseed, Argon2id + AES-256-GCM)
  • Card pairing, card list, card activity log
  • Native NFC bridges (Core NFC on iOS, reader mode on Android) and universal/app links from the card

What you get

nfc-crypto-v1.0.0.zip3.7 MB
  • Full source code v1.0.0Every file, nothing encrypted
  • DocumentationInstall, configure, deploy
  • Setup and brandingFree, done by us

Built with

  • Flutter
  • Python

You need

  • Flutter >=3.29.0 (developed with 3.41)
  • Dart SDK nfc_crypto '>=3.2.0 <4.0.0'; cryptocard_wallet and nfc_recovery ^3.11.1
  • iOS iOS 15.5+ (nfc_crypto), iOS 15.0+ (cryptocard_wallet, nfc_recovery); Xcode 16+; iPhone XS or newer for NFC
  • Android compileSdk/targetSdk 36; minSdk = Flutter default (24) for all three; NFC-capable phone
  • Python (Card Studio) 3.10+; pyscard>=2.0, argon2-cffi>=23.1, cryptography>=42; optional pywebview>=5

Questions

What can I do with it?

Anything. One price, no licence tiers: use it for any number of projects and clients, run it as a paid SaaS, change and rebrand it.

Is the code complete?

Yes. Full source code and docs, no encrypted parts, no licence server.

What does the free setup include?

We install NFC Crypto Kit for you and put in your logo, colors and texts. Write to us after the payment with your order number.

Can I pay another way?

Write to mikodes.team@gmail.com or on Telegram and we send an invoice or a payment link.
$699Instant ZIP, free setup