Starknet

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 released two integration options for developers building privacy features: **Integration Options:** - **Wallet API** (via starknet.js): Simplified approach where the wallet manages viewing keys and proofs automatically - **TypeScript SDK** (Apache 2.0): Full control over notes and proving for wallets and advanced integrators **What's Available:** The privacy stack enables shielded balances and private DeFi on mainnet. The STRK20 standard allows users to shield any asset in one click while maintaining compliance capabilities. Developers can now add privacy features with minimal integration work, while businesses can build confidential onchain solutions. The infrastructure supports practical privacy designed for real-world crypto use cases.

Several Starknet ecosystem projects are now building privacy-focused applications using STRK20: - **AVNU** is developing trading and routing infrastructure for STRK20 and private asset flows - **Troves** is creating automated yield vaults with private deposits - **Forge Yields** is exploring cross-chain yield vaults with private, institutional-grade allocation - **Provable Games** is working on private onchain organizations - **Invoicemate** is building a private mainnet featuring a one-click privacy toggle for lenders These developments follow earlier announcements about STRK20 expanding across Starknet, including broader app integrations, open-source SDK access, and a Proof of Privacy incubator launch.

A new privacy solution allows users to perform **anonymous swaps** directly against existing liquidity pools without requiring isolated pools or cold starts. **Key features:** - Multi-call privacy enables users to unshield, swap, repay, and reshield assets in a single transaction - Works through existing signing keys via native account abstraction - no new wallet required - Users can shield assets in one click and control wallet disclosure - Builders can add private flows without rebuilding privacy infrastructure - Compatible with ERC-20 assets on Starknet without new token standards or wrappers - Designed for institutional use with confidentiality by default and customizable disclosure paths The solution addresses common privacy challenges by integrating directly with existing DeFi infrastructure rather than creating fragmented liquidity pools.

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.

The Financial Privacy Inc (FPI) holds the master disclosure key within a dual-enclave Trusted Execution Environment (TEE), establishing a multi-layered security framework for Starknet's privacy infrastructure. **Key Security Measures:** - Primary protection: 3-of-4 multisig split between StarkWare and FPI - Secondary backup: 7-of-12 multisig controlled by Starknet Security Council - Disclosure only occurs through valid lawful requests assessed by FPI **Privacy Features:** - Users undergo screening when entering STRK20 Privacy Pool - All activity remains encrypted once inside - Selective disclosure limited to specific users, transfers, or time windows as requested This architecture balances user privacy with regulatory compliance through independent oversight.

**STRK20 Privacy Pool** has implemented a compliance framework that balances user privacy with regulatory requirements. **How it works:** - Users undergo screening before entering the privacy pool - All activity inside remains encrypted - Disclosure only occurs following valid lawful requests - Independent audit firm **FPI (Financial Privacy Inc)** assesses each request - Only specific requested information is revealed (individual user, transfer, or time window) The system uses viewing keys encrypted by an independent auditor, enabling scoped access without exposing other pool participants. This approach aims to prevent the common issues of fund freezes and asset delistings that affect privacy solutions unable to respond to legal requests without compromising entire user pools.

**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.*

**Private swaps are now live on Starknet**, marking a significant milestone for privacy-focused DeFi on the network. **Key features:** - Private transactions enabled through Paymaster integration - Powered by AVNU protocol - Available on Starknet Mainnet This launch represents Starknet's entry into privacy-preserving DeFi, allowing users to execute token swaps without publicly exposing transaction details on-chain. The announcement includes a guide for users to begin swapping privately on the platform.

**Privacy doesn't have to mean breaking compliance rules.** Most privacy solutions face a problem: they either can't respond to legal requests without exposing everyone, or they isolate users in fragmented ecosystems. **STRK20 takes a different approach:** - Viewing keys are encrypted by an independent auditor - Legal requests can be answered with scoped access per user - Other users in the pool remain protected - No need to freeze funds or delist assets This design keeps privacy functional while meeting regulatory demands—connecting users to existing DeFi without the compliance risks that have plagued other privacy tools.