Smart Contract
NFC Plastic Card.

Spend your crypto securely in the real world. No central authority, no frozen bank accounts. Just you, your PIN, and a non-custodial smart wallet in your pocket.

--- Users

--- Merchants

ZionDefi | Black

Active

•••• 8F9E

Card Holder

Satoshi Nakamoto

Smart Contract Address

0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b...

Click to flip

Hardware Security.
DeFi Freedom.

Your funds never leave the contract until the exact moment of purchase. Completely non-custodial, infinitely scalable.

Non-Custodial

You hold the keys. The smart contract holds the funds. We cannot freeze, access, or seize your assets. You are the bank.

Auto-Swaps

Hold STRK or ETH, but pay merchants in USDC. The contract automatically swaps with strict slippage protection in one transaction.

ECDSA PIN Security

Every payment is mathematically signed on your device using your 6-digit PIN before hitting the blockchain. Hardware-level security.

Gasless Experience

Never worry about gas fees. ZionDefi Relayers pay the gas for you, extracting a micro-fee from the transaction transparently.

On-Chain Fraud Prevention

Set strict daily spending limits, maximum transaction amounts, and automatically blacklist malicious merchants. If a charge exceeds your historical anomaly threshold, the card automatically freezes itself to protect your funds.

10% Fee Cashback

Individuals automatically earn 10% of the protocol transaction fee back into their card balance on every single purchase. Spend and earn.

Omnichain Deposits

Bridge and deposit funds directly to your card from Ethereum, Arbitrum, Optimism, Polygon, or any major chain in seconds.

Total On-Chain Control

Freeze, unfreeze, or permanently burn your card on-chain with a single tap. If a card is burned, all funds are instantly swept back to your wallet.

Developer First.
Integration in minutes.

Merchants charge your ZionDefi card just like a standard Visa or Mastercard. Our powerful API handles the complex interactions, real-time USD/Token conversions, and cryptographic PIN verification instantly.

Simple REST API integration for merchants.
Auto-converts to Merchant's preferred stablecoin.
Instant Layer 2 Settlement.

charge_card.js

const ziondefi = require('ziondefi-node');

// 1. Configure Merchant API Keys
ziondefi.public_key = 'pk_live_8f9e2b4c...';
ziondefi.secret_key = 'sk_live_9a1d3f7e...';

// 2. Initiate a charge request
const charge = await ziondefi.charges.create({
  amount: 15000, // $150.00
  currency: 'usd',
  card_address: '0x049d365...4dc7',
  description: 'MacBook Pro Case',
  
  // The cardholder's ECDSA PIN signature
  auth_sig_r: request.body.sigR, 
  auth_sig_s: request.body.sigS   
});

if (charge.status === 'succeeded') {
  console.log(`Payment successful! Tx: ${charge.transaction_hash}`);
}

ZionDefi vs TradFi

Feature	ZionDefi	Visa / Mastercard
Custody of Funds	Self-Custody (You)	Bank / Exchange
Settlement Time	Instant (L2)	2 - 5 Business Days
Chargeback Fraud	Zero (Immutable)	High (Reversible)
Global Merchant Fee	0.5% Flat Capped $10	2.5% - 3.5% + Fixed
Censorship Resistance	100% Resistant	Can freeze anytime

Transparent Pricing

Monthly Cost

Forever.

Card Deployment $2One-time
Transaction Fee (Paid by Merchant) 0.5% Flat Capped $10
Gas Fees Abstracted
Expires? Does not exist

The Roadmap

Phase 1 (Current)

Testnet & Security Audits

Deploying core logic to Starknet Sepolia. Refining PIN security algorithms and Relayer infrastructure.

Phase 2

Mainnet & Waitlist Fulfillment

Deploying on Starknet Mainnet. Shipping physical RFID/NFC plastic cards to the first 5,000 waitlist members.

Phase 3

Merchant SDKs & POS Terminals

Releasing ZionDefi developer SDKs for seamless e-commerce checkout and launching physical POS terminal integration.

The Builders

Bringing Web3 to your physical stores.

Adeyeye George

Founder & Engineering Lead

@manomitehq

Mercy Owoade

Co Founder & Marketing Lead

@mercyignites

Smart Contract NFC Plastic Card.

Hardware Security.DeFi Freedom.