Last Call for Starknet Hacker House Applications

Ready wallet has integrated STRK20 Shielding for Ledger hardware devices, enabling users to keep private keys in cold storage while maintaining balance privacy on Starknet. **Key Features:** - Hardware wallet security meets on-chain privacy - Keys remain on Ledger device throughout shielding process - Flat 4 STRK fee (~$0.12) regardless of amount - Works with Starknet's native privacy infrastructure **How It Works:** Tokens are deposited into STRK20 privacy pools where balances and amounts are encrypted. Users can then perform private swaps through [AVNU](https://avnu.fi) with one-click privacy toggle. This integration extends Starknet's privacy stack to cold storage users, combining the security of hardware wallets with confidential transactions.

Sats Terminal has launched on Starknet, powered by Vesu, enabling users to borrow USDC against their Bitcoin holdings. **Key Features:** - Access to competitive lending rates across Starknet's BTCfi ecosystem - Integration brings Sats Terminal's existing user base of over 100,000 unique wallets to Starknet - Builds on Starknet's existing BTCfi infrastructure, which includes tBTC staking options **Context:** Starknet has been developing its Bitcoin DeFi capabilities since launching direct tBTC minting in June. The network offers: - tBTC staking through Endur with target yields around 2.5% APR - Auto-looping vaults via xtBTC (liquid staking token) - Bridge connections from Ethereum L1 The expansion positions Starknet as a scaling solution for Bitcoin-based decentralized finance, combining faster transaction speeds with Bitcoin liquidity. *Note: DeFi protocols carry inherent risks including smart contract vulnerabilities and market volatility.*

Starknet has introduced a **flat-fee privacy solution** for onchain transactions, charging just **4 STRK (approximately $0.12)** regardless of transaction size. **Key features:** - Same fee applies whether shielding $10 or $1 billion - No variable pricing based on transaction amount - Aims to make privacy practical and scalable for everyday use This pricing model contrasts with traditional approaches where larger transactions typically incur higher fees. The fixed-cost structure makes private transactions predictable and accessible across all transaction sizes. The solution addresses a key barrier to privacy adoption: cost-effectiveness at scale.

Starknet has officially launched its privacy infrastructure for builders with the release of SDK and Wallet API tools. **What's New:** - Developers can now integrate privacy features into their applications using the new SDK and Wallet API - Shielded balances and private DeFi protocols are already operational on mainnet - The STRK20 standard enables users to shield any asset with one click **Key Features:** - Privacy layer works without requiring new token standards or wrapped assets - Built-in compliance layer for institutional use cases - Minimal integration work required for existing teams The infrastructure aims to bring practical privacy to crypto applications while maintaining compatibility with existing ERC-20 assets and DeFi protocols.

**STRK20** introduces privacy features for ERC-20 tokens on Starknet while maintaining regulatory compliance through encrypted viewing keys. **Key Features:** - Private balances, transfers, and swaps for any ERC-20 on Starknet - Fixed cost of 4 $STRK per transaction, regardless of size - Single shared privacy pool that strengthens as more users join - Encrypted viewing keys allow authorized auditors to access specific information on legitimate requests **How It Works:** Users can shield ERC-20 tokens into private balances, conduct private transactions, then unshield with one click—all within the same wallet and liquidity pools. The framework leverages Starknet's provable computation capabilities to verify private transactions without exposing details. As the privacy pool grows with more users and assets, individual transactions become harder to isolate. **Ecosystem Expansion:** STRK20 is rolling out across Starknet with integrations for [avnu](https://avnu.fi) and [Ekubo](https://ekubo.org), plus an open-source SDK. The [Proof of Privacy incubator](https://starknet.io) supports teams building private applications for payments, trading, identity, and DeFi. *Privacy by default, accountability when required.*