How zlink.cash Enables Private DeFi
zlink.cash acts as the backbone of on-chain privacy, enabling users to interact with decentralized finance (DeFi) protocols like Uniswap or PancakeSwap — privately. It bridges the gap between transparent blockchains and private user activity by shielding funds and generating zero-knowledge proofs for every confidential interaction.
How It Works
Entering Privacy Mode
A user starts by depositing assets into the zLink-Core (through zLinkShieldRouter) contract.
The contract creates a commitment inside the Merkle tree, and the user’s funds become shielded — meaning their wallet and balances are now private.
At this point, the user has effectively “entered” the privacy layer of zlink.cash.
Private Trading Example (Uniswap / PancakeSwap)
Suppose the user wants to trade privately. Instead of interacting directly with Uniswap, they go through the zLink-Swap-Proxy.
The user generates a zero-knowledge proof (zkProof) to prove they own, for example, 100 USDC in the shielded pool — without revealing their identity or balance.
The user then requests to trade 50 USDC for 50 USDT, while keeping the remaining 50 USDC shielded.
What Happens Behind the Scenes
The zLink-Swap-Proxy submits the zkProof to withdraw the necessary funds from the shielded pool.
Once verified, the funds are temporarily unshielded inside the proxy contract.
The contract performs the swap on Uniswap or PancakeSwap.
Finally, the output tokens (e.g., USDT) are re-shielded back into the pool for the user.
What You See on the Blockchain
From an outside observer’s perspective, here’s what’s visible:
A relayer (not the actual user) swapped $100 USDC for USDT.
No one can tell who made the trade, how much balance they still hold, or what their wallet address is.
All sensitive information — the owner’s identity, balances, and transaction paths — remain completely private.
Why It Matters
This mechanism allows users to engage in DeFi activities privately while keeping all transactions verifiable on-chain. zlink.cash enables:
Private Trading: Shielded swaps across major DEXs.
Secure Privacy Layer: Fully decentralized, no centralized mixers or custodians.
Composable Privacy: Integrates seamlessly with other protocols without breaking transparency.
In essence, zlink.cash makes private DeFi possible — combining the power of open finance with the confidentiality users deserve.
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