Hidden holders
Tokens you buy become private notes in a shared Merkle tree. Explorers see a tree of commitments, not a list of wallets and balances.
// the private memecoin launchpad on Solana
hash
hash
crash
Launch and trade memecoins nobody can track. Your bag is a private note, not a public wallet balance. No holder list for snipers, bundlers or copy-trade bots to farm.
What you get
Trade like nobody's watching, because nobody can
On every other launchpad, the moment you buy, bots know your wallet, your size and your history. hashcrash borrows the shielded-pool design that made Zcash famous and puts it under a bonding curve. The curve works the way you already know. The holder list is gone.
Snipe-proof launches
Bots can't tell who loaded up early, which wallets are linked, or who is the dev. Nobody gets copy-traded, and no bundle is there to farm.
Make any pump.fun coin private
Already holding a coin on pump.fun? Wrap it. Our vault holds the tokens and you hold a private note for your share. On pump.fun's holder list, you disappear into one vault.
Clean exits
Sell with a zero-knowledge proof and send the SOL to any address you choose, including a brand-new one. Your buy wallet and your sell wallet never touch.
How it works
Same curve, different receipt
Buy
Pay SOL into the bonding curve. Pay from shielded SOL through a relayer and your wallet never appears at all.
Get a note
Instead of tokens landing in your wallet, a commitment to your note joins the tree. Only your secret can open it.
Hold or send
Split, merge or send notes to friends inside the pool. Every holder of every coin hides in the same crowd.
Sell
Prove you own a note without saying which one. The program checks the proof, records a spent tag and pays out SOL.
Try it now
Make a private buy in your browser
This builds a real note in your browser: a random secret, a commitment that goes into the tree, and the spent tag you'd reveal when selling. The left side is everything the public can see. The right side never leaves your device.
What the chain sees
Press "Buy privately" to add a note to the tree.
What only you hold
Your note's secret will appear here.
The demo uses SHA-256 for readability. The on-chain version uses Poseidon commitments and Groth16 proofs, which Solana can verify natively. The coins listed are examples.
Two ways in
Launch here, or wrap what you already hold
Launch on hashcrash
- Create a coin with a pump.fun-style bonding curve
- Private from the first buy, including the dev's
- Every coin shares one pool, so even small launches have a big crowd to hide in
Wrap a pump.fun coin
- Paste any pump.fun mint and buy through hashcrash
- The vault buys and holds, and you get a private note
- Unwrap anytime to get the real tokens back
| pump.fun | hashcrash | |
|---|---|---|
| Holder list | Public, every wallet | None |
| Wallet tracking | Easy | Nothing to track |
| Dev wallet visible | Yes | No |
| Sell to a fresh address | Manual, linkable | Built in, unlinkable |
| Price and trade sizes | Public | Public, the curve needs them |
Why Solana
Privacy at memecoin speed
Groth16
Solana verifies zero-knowledge proofs natively, so a private sell costs about the same as a normal one.
Poseidon
A built-in syscall keeps the commitment tree cheap to update, even with thousands of notes per launch.
~400 ms
Slot times keep private trading close to the speed you're used to.
hashcrash is an independent project inspired by Zcash's shielded pool design. It is not affiliated with or endorsed by pump.fun, Zcash, Shielded Labs or Zooko Wilcox. Prices and trade sizes on the bonding curve are public. Memecoins are highly speculative and can go to zero.