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Echooo is a decentralized self-custodial MPC&AA smart contract wallet app that supports multi-signature and social recovery.

The multi-signature mechanism ensures security while significantly reducing transaction costs through Echooo's unique AI-driven technology architecture, combined with the zkSync layer2 network. Echooo uses the ERC-4337 standard and continuously optimizes account abstraction, so as to deliver a better user experience and a seamless transition from Web2 to Web3 for more users.

Hybrid Wallet (EOA + Vault):
· EOA wallet for high-frequency trading with MPC protection.
· Smart Contract Account Vault for low-frequency trading with Multi-Signature & Social Recovery.

Security:
· Echooo is seed phrase free with security ensured by algorithm encryption and cloud storage technology.
· Multi-Layer Security Infrastructure combined with MPC, TEE (Trusted Execution Environment), social recovery and multi-signature infrastructure to ensure bulletproof asset security.
· No single point failure anymore with an account recovery mechanism in place.

Multi-chain Support:
· Echooo supports both all EVM-compatible chains and main non-EVM chains.

Embedded Smart AI Engine:
· Transaction costs are significantly reduced in Echooo wallets through Echooo's unique AI-driven technology architecture, combined with the zkSync layer2 and other Ethereum Level 2 network.
· Realtime Risk Detection: Users will be notified immediately when risks are detected.
· Smart Trading Router: It sources liquidity from various exchanges and is capable of splitting a single transaction across multiple DEXes to ensure the best rates.

User-friendly:
· Supports payment of gas fees in multiple currencies.
· Uses the ERC-4337 standard for continuous optimization of account abstraction.
· Provides optimal exchange ways especially for leading providers and local providers.