PrivX Pay — Private Digital Cash

This is your PrivX ATM.
Deposit stablecoins into a private shield vault and receive an encrypted denomination note — exactly like withdrawing $20 bills from a cash machine. Scan the note QR into the PrivX Pay mobile wallet on your phone. Your notes are private digital cash, held in your pocket.

Zero-knowledge proofs No on-chain identity Bearer notes 0.5% deposit fee

How it works

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1. Shield Stablecoins

Deposit DAI, pSunDAI or USDC here on desktop. Choose a denomination and confirm — funds enter the private shield vault.

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2. Receive a Note

You receive an encrypted bearer note — a secret string representing that denomination, like a $20 bill in digital form.

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3. Scan to Phone

Open the PrivX Pay mobile wallet, tap Scan Note, and point it at the QR on this screen to load the note into your phone.

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4. Private Digital Cash

Your phone holds your notes as private, spendable cash. No on-chain link between your deposit and any future redemption.

Deposit

Wallet

Redeem

You're at the ATM. Shield stablecoins into a private vault and receive an encrypted denomination note — a bearer instrument, like a $20 bill in digital form.

1. Choose currency & denomination below.
2. Connect wallet → approve → confirm deposit.
3. Scan the note QR into your phone using the PrivX Pay mobile wallet.
4. Your note is now in your pocket — private digital cash.

Do this at home on desktop. A 0.5% fee is charged at deposit.

Choose Currency

DAI

Stablecoin

pSunDAI

Autonomous Stable

USDC

USD Coin

Choose Denomination

Not connected

Note shielded — scan this QR with the PrivX Pay mobile wallet to load it onto your phone, or copy the note text as a backup.

Privacy & Security

How is my privacy protected?
When you deposit, a cryptographic commitment is stored on-chain — not your address or amount. When the note is redeemed, a zero-knowledge proof confirms the note is valid without revealing which deposit it came from. No on-chain link between sender and receiver exists.

What if I lose my note?
The note is your only key. If lost, the funds in that shield slot cannot be recovered by anyone — including the protocol. Scan notes to your phone wallet immediately after shielding, and keep a text backup in encrypted storage.

Can a note be used twice?
No. Each note has a unique nullifier that is recorded on-chain the moment it's redeemed. Any second attempt with the same note will revert. This is enforced by the smart contract, not the UI.

What are PRIVX mining rewards?
Merchants who redeem notes earn PRIVX tokens from the PrivX Pay Mining Vault. Rewards scale with denomination — larger bills earn more PRIVX per redemption. Rewards reduce proportionally as the vault empties and refill when the community tops it up.

Who controls the contracts?
The PrivX Pay shields are fully immutable after deployment — no admin can pause, upgrade, or confiscate funds. The protocol fee (0.5%) and mining rewards are set at construction and cannot be changed.