▸ Idea 06 · Infrastructure
One-click privacy from any chain - Starknet as the privacy layer of crypto
Any user on Ethereum, Base, Arbitrum, or Solana gets one-click access to STRK20 privacy - without learning Starknet, installing a new wallet, or holding STRK. Bridge in, hold private, withdraw to any chain with zero on-chain link.
What this enables
- →Starknet as the privacy layer of crypto. Users come from every chain, pool their anonymity set, leave to any chain. The larger the pool gets, the stronger every individual's privacy. Network effects compound - more users → stronger privacy → more users.
- →Privacy for non-Starknet users. The vast majority of crypto users are on Ethereum, Solana, Base, Arbitrum. They don't want to learn a new chain. This abstracts all of it: connect existing wallet, get privacy, leave to any chain. Starknet is the engine, not the destination.
- →Cross-chain link breaking. Deposit on chain A, withdraw on chain B, no on-chain connection. Useful for portfolio restructuring, post-CEX-withdrawal privacy, multi-chain DeFi privacy, fresh starts for surveilled wallets.
- →Compliance-compatible. Unlike Tornado Cash (OFAC-sanctioned), this has a compliance path: viewing-key registration, auditable trace under legal process, self-disclosure for tax reporting. Confidentiality from public surveillance - not sanction evasion.
The growth lever
Starknet has ~20K DAU. Ethereum has ~400K. Base has ~2M. Solana has ~1.5M. The strongest path to a meaningful anonymity set isn't growing Starknet's user base 10× - it's tapping the existing users on other chains. Cross-chain privacy access does both at once: brings users and their assets into the pool, generates bridge + pool fees, grows the anonymity set.
What you build
A PrivacyHub helper contract that orchestrates bridge → shield → unshield → bridge. Source-chain UX wraps existing bridges (StarkGate, LayerSwap, Orbiter). Deterministic Starknet account generation from any chain's wallet (already shipped via earn-contracts for cross-chain yield - reused here for privacy onboarding). The user signs with MetaMask / Phantom; the rest is automated.
User mental model
"I have 10 ETH on Arbitrum. I want to send 5 ETH to a fresh address without anyone linking the two."
- →Connect Arbitrum wallet
- →Select 10 ETH → "Make Private"
- →Wait ~2 minutes
- →"10 ETH (private)" in dashboard
- →Later: "Withdraw" → enter a Base address → receive ETH on Base, no link to the source
The user never thinks about Starknet.
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