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Basics of fhEVM

fhEVM enables confidential smart contracts on EVM-compatible blockchains using Fully Homomorphic Encryption (FHE). It ensures data privacy while maintaining usability and interoperability.

Core Principles

  1. Security: No compromise on blockchain security.
  2. Public Verifiability: Confidential yet verifiable computations.
  3. Developer-Friendly: Familiar Solidity tools.
  4. Composability: Interoperable confidential and public contracts.

Key Features

Encrypted Data Types

  • Booleans: ebool
  • Integers: euint4, euint8, ... euint256
  • Addresses: eaddress
  • Bytes: ebytes64, ebytes128, ebytes256
  • Inputs: einput

Type Casting

  • Convert between encrypted types: TFHE.asEbool, TFHE.asEuintX, TFHE.asEaddress, etc.

fhEVM empowers secure and efficient computation on encrypted data while preserving blockchain functionality.