Deposits

When you deposit into ZeroK, your SOL or USDC joins one shared, shielded vault for that asset. Here is everything worth knowing.

What happens when you deposit

1. You enter any amount and approve a single transaction in your wallet.
2. Your SOL joins the shared vault on chain.
3. A private note is created, encrypted with a key derived from your wallet signature, and stored on chain alongside your deposit.

The whole thing is non custodial. The protocol is a smart contract on Solana, and only your wallet can produce a valid spend. The transaction confirms in well under a second, and your deposit immediately joins the crowd.

Any amount, no choices to make

You enter one number. That is it. There are no fixed sizes to pick and no pools to choose between. Deposit 0.05 or 250, round or odd, it all works. Behind the scenes ZeroK keeps your spending on a clean, even footing so your payments always blend in, but you never have to think about any of that.

Your note, handled for you

Your note is the secret that lets you spend. Instead of asking you to back up a file, ZeroK uses your wallet itself as the recovery key:

• When you deposit, your wallet produces a signature that derives an encryption key.
• That key encrypts your note, and the encrypted note is written to the chain as part of the deposit.
• Reconnect later and the same signature decrypts the same notes.

So your private balance follows your wallet, not your browser. Close the tab, switch devices, or come back a year later. Reconnect the same wallet and your balance is right there.

The crowd you join

Your deposit joins the vault’s anonymity set, the full group of unspent funds inside. When someone spends, the chain shows that value left the vault but not which note paid for it. How much that hides you depends entirely on how many notes are in there with yours.

• Right after you deposit, the crowd may be small. If you are the only recent depositor, your privacy is limited.
• As more people deposit, the crowd grows and your privacy strengthens.
• With steady activity, an observer has very little chance of tying your deposit to any particular payment.

Tip: for stronger privacy, let a few more deposits land before you spend. See the Privacy model for more.

After your deposit

Once it confirms:

1. Nothing to save. Your note is already encrypted and stored for you.
2. Let the crowd grow if you want maximum privacy.
3. Spend to any address when you are ready. See Withdrawals.