Arion
Earn yield on Zcash without compromising anonymity
Created on 4th December 2025
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Arion
Earn yield on Zcash without compromising anonymity
The problem Arion solves
Arion - Privacy-Preserving DeFi Yield Protocol: Earn yield on your Zcash without compromising anonymity
Arion enables Zcash holders to earn DeFi yields (Aave) on Base L2 network while maintaining privacy through shielded transactions. Users deposit from shielded addresses, the system handles cross-chain swaps via NEAR Intents, and withdrawals return to shielded addresses — keeping on-chain activity unlinkable.
Problem
DeFi requires exposing wallet addresses and transaction history on public blockchains. Privacy coins like Zcash offer shielded transactions, but can’t directly access DeFi yield opportunities on other chains.
Solution
Arion bridges Zcash’s privacy layer with Base’s DeFi ecosystem:
- Shielded Deposits: Users send ZEC from shielded wallets to transparent addresses
- Cross-Chain Swap: NEAR Intents automatically swaps ZEC → BASE ETH
- Yield Generation: ETH deposited to Aave on Base network
- Private Withdrawals: Reverse swap ETH → ZEC to user’s transparent address
- Shield Again: Users shield ZEC back to their shielded address
Result: On-chain observers cannot link users’ shielded addresses to their DeFi activity.
The App is currently on Zcash and Base Mainnet (Check links for access to live contract)
Challenges I ran into
Running Zcashd locally and waiting for blocks and headers to sync was very time-demanding.
Deserializing date and time for MongoDB was a phase of trial and error.
Tracks Applied (12)
Cross-Chain Privacy Solutions
Axelar Network
Cross-Chain Privacy Solutions
Osmosis
Private Payments & Transactions
Osmosis
Private DeFi & Trading
Zcash Community Grants
Privacy Infrastructure & Developer Tools
Zcash Community Grants
Private DeFi & Trading
Unstoppable Wallet
Cross-Chain Privacy Solution
Bitlux
Privacy Infrastructure & Developer Tools
Raybot
Cross-Chain Privacy Solutions
NEAR Protocol
Private Payments & Transactions
NEAR Protocol
General Bounty
Project Tachyon
Private Payments & Transactions
Star Fun



