Sealed on Zyn.
Anchored in Zcash.
Every epoch seals the ledger into one state root, laid down on top of the last. The operator writes those roots into ordinary Zcash transactions, so each anchored layer is pinned to a Zcash block that anyone can look up.
It runs. Open any of it.
These are the live apps, captured from their public addresses on testnet. Nothing here is a mockup.
Ask the ledger yourself.
ZynScan's API is public and needs no key. This is the newest sealed epoch, fetched when you opened this page.
$ curl https://zyn-rpc.cavebro.win/scan-testnet/api/epochs
…
Built on Zyn
Cave is the first consumer app on Zyn: Collection Z, the Cave store and the Jade launchpad. Nap is the wallet all of them talk to. Every screen below is a live capture.
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Nap Wallet
Mainnet · TestnetShielded ZEC and Zyn notes side by side. In the browser now; the extension and phone apps are waiting on store review.
nap.cavebro.win -
Market
Built and enabledSwaps and pools inside the VM. Orders in one epoch clear together at one price, so nothing can be sandwiched within a batch. The operator still sees each order and can refuse or delay it.
nap.cavebro.win/market -
Jade
MainnetCoins start on a bonding curve and graduate into a market pool. Reserves and fees are published on ZynScan.
cave-jade.pages.dev -
Collection Z
Mainnet4,444 pixel creatures: 2,222 Moles, 1,333 Owls and 889 Moths, frozen under one root. Traded in the Cave store, every write signed in your wallet.
cavebro.win -
Bridge
ZEC mainnet · others testnetZEC in and out through a 2-of-3 threshold vault. SOL, ETH and BTC on test networks (Solana devnet, Sepolia, Bitcoin signet), their test keys on a single machine.
nap.cavebro.win/bridge -
ZynScan
Mainnet · TestnetAn explorer that replays each network's journal and compares every root with the node's.
zynscan.pages.dev
What you are trusting
One operator orders transactions. Zyn is operator-sequenced, with no fraud proofs and no validity proofs.
Withdrawals depend on our custodians. Bridged ZEC is backed by ZEC in a 2-of-3 threshold vault run by the Zyn team.
Zcash keeps time; it does not check our work. It records deposits, withdrawals and anchor commitments, but does not validate Zyn state transitions. Zyn does not inherit Zcash's security.
Private from the public, visible to the operator. Who holds and trades what is not published. The operator and authorised verifiers can see it today; we are working toward a version where they cannot.
Hallmarks
Precious metal carries stamps anyone can check. These are Zyn's, and none of them needs our help.
- BACKED
Issued against the vault. The ledger publishes what it has issued per asset; the bridge checks the vault still holds it every pass, and you can compare the same figure with the vault's balance on Zcash.
- REPLAYED
Rebuilt from the journal. ZynScan replays every sealed epoch and reports whether its root matches the node's.
- ANCHORED
Written into Zcash. Once a root is anchored, changing it would contradict a Zcash block.
- SEALED EXIT
Destination kept to one reader. A withdrawal records only a hash of where money goes; the address is shown to the bridge that pays it.
Questions
Straight answers, including the uncomfortable ones. The short version is in what you are trusting.
What is Zyn?
An application execution layer built for Zcash. It runs deterministic application state machines (a wallet, a market, a launchpad, a collection), batches their activity into epochs, and anchors each sealed state root to Zcash.
Is Zyn a Zcash layer 2, a rollup or its own chain?
No. Zyn is operator-sequenced: one sequencer orders transactions, and there are no fraud proofs or validity proofs. Zcash records its deposits, withdrawals and anchor commitments but does not validate its state transitions, so Zyn does not inherit Zcash's security. Built for Zcash, not part of it.
How do I start?
Open Nap Wallet in your browser and create or restore a wallet with a 24-word recovery phrase. There is no account server: your keys are derived on your device. Try it on testnet first; testnet coins are worth nothing.
How does ZEC get in and out?
Send shielded ZEC to your Nap deposit address and it arrives on Zyn as ZEC.zy. Withdrawing burns ZEC.zy on Zyn and the bridge pays ZEC back to the Zcash address you give. Withdrawals depend on the Zyn-operated custodians: the ZEC sits in a 2-of-3 threshold vault run by the Zyn team.
Is what I do private?
From the public, yes: who holds and trades what is not published, and a withdrawal records only a hash of where the money goes. It is visible to the operator and authorised verifiers today. We are working toward a version where it is not visible to anyone.
How can I tell the ZEC is really there?
The ledger publishes what it has issued of each asset, and the bridge checks every pass that the vault still holds that much. Anyone can compare the same figure with the vault's balance on Zcash. ZynScan separately replays every epoch and checks its root against the node's.
What does anchored mean?
Each sealed epoch has a state root. The operator writes that root into an ordinary Zcash transaction, so it is timestamped in a Zcash block anyone can look up, and it cannot later be rewritten without contradicting that block. Zcash stores the commitment; it does not check the state behind it.
What if the operator stops or refuses my transaction?
The operator can refuse or delay a transaction, and leaving depends on the custodians. The published journal and the anchored roots are evidence of what the ledger held; they do not release money by themselves. That is the trust you are extending today, which is why it is stated up front.
Are the SOL, ETH and BTC bridges live?
On test networks only: Solana devnet, Ethereum Sepolia and Bitcoin signet, with their test keys on a single machine. They exist to show the design (a one-time deposit code instead of your account, an exit address only the paying bridge sees), not to hold real value.
Can I build my own app on Zyn?
Not by deploying a contract. Zyn is a programmable architecture, but applications are compiled into the node rather than uploaded by anyone. What runs today is listed above.