zama_fhe 0.0.1

Pure-Dart client for the Zama Protocol (fhEVM): network configs, ciphertext handle computation, FHE type system, and EIP-712 typed-data builders for user/public decryption. The cryptographic engine (T [...]

Changelog

0.0.1

Initial public preview of zama_fhe — the pure-Dart core of the first Dart/Flutter SDK for the Zama Protocol (fhEVM).

• FhevmInstance — wires a crypto backend, the relayer, and the protocol glue into one entry point (createEncryptedInput, publicDecrypt, userDecrypt).
• EncryptedInputBuilder — typed input assembly (addBool, add8/16/32/ 64/128/256, addAddress) with range validation.
• FHE type system: ebool, euint8–euint256, eaddress.
• Ciphertext handle computation, 92-byte auxiliary input metadata, EIP-712 typed-data builders for user/public decryption.
• Relayer HTTP client with content-addressed key-material caching.
• KMS threshold-signature verification (a user-decrypted value is rejected unless at least threshold responses recover to a known KMS signer).
• Pluggable FhevmBackend / KmsBackend interfaces — the cryptographically heavy work (TFHE encryption + ZK proof, ML-KEM user decryption) is supplied by separate native (zama_fhe_ffi) or web backends, so the same app code is portable across platforms.

The full confidential lifecycle (encrypt → ZK input proof → on-chain tx → public decryption and private threshold-verified user decryption) has been verified live on Sepolia, including on-device encryption in a Flutter app on Android and iOS.