# Privacy Cash

> Your SOL waits in a shared pool with everyone else’s, then lands later.

Source: https://ravenwallet.pro/docs/privacy-cash

### Privacy Cash

*A shared pool and a zero-knowledge proof*

You pay into a pool many people use. Later the pool pays your other wallet, with a proof that the money is yours to take and no word of which deposit it came from.

| | |
|---|---|
| Lands in | Right away to a day |
| Recommended wait | 1 to 6 hours |
| Amounts | Round, the ones many people use |
| Costs | A small cut, read live |
| Raven’s fee | 0.2%, after the deposits land |

## How the money moves

- Your wallet (7xKX…9fGh) → 1 SOL → The pool (everyone’s SOL) → wait → Relayer (sends the proof) → about 1 SOL → Your other wallet (Hq3P…2mVd)

The pool cannot say which deposit a payout came from, so the chain cannot either.

## Two rules that make it work

- **Round amounts.** What goes in and what comes out are amounts many people use, never the exact sum, so amounts cannot be matched.
- **A wait.** Each landing is due at its own random time, so times cannot be matched either.

## When it lands

| Wait | How hard to match |
|---|---|
| Right away | Easiest |
| Within an hour | Some cover |
| 1 to 6 hours | Recommended |
| Within a day | Hardest |

## Landing

Landings happen while Raven is open in the browser that made the move. If one fails, Raven tries again by itself five times, then waits for you to tap **Try again**. The SOL stays safe in the pool the whole time.

## Under the hood

- **Zero-knowledge proof**: Your browser makes a proof that you own one of the pool’s deposits without saying which. The pool checks the proof and pays out.
- **A relayer sends it**: The payout is sent by Privacy Cash’s relayer, so your other wallet never has to pay a fee that would link it to you.
- **Made in your browser**: The proof is made in your browser, with Privacy Cash’s circuit served by Raven itself.
- **What Privacy Cash sees**: Which wallet paid in. The proof keeps it from knowing which payout was yours.