https://cybertoolchain.io/tools/fhevm New releases and features in fhEVM, tracked by The Cyber Toolchain. en Fri, 30 Oct 2026 18:07:35 GMT https://github.com/zama-ai/fhevm/releases/tag/v0.14.5 https://github.com/zama-ai/fhevm/releases/tag/v0.14.5 Fri, 30 Oct 2026 18:07:35 GMT fhEVM adds BSC testnet support and a relayer query option to the Solidity library and SDK⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Add BSC testnet chain support to the SDK with the new `feat(sdk): add BSC testnet chain` backport, enabling encrypted smart contract development on Binance Smart Chain testnet.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Add a relayer query option to the SDK via the backported `relayer query option` (`#4544`), giving developers control over relayer selection when submitting encrypted transactions. • Remove transient allowance for inputs to sender in the Solidity library, changing how input permissions are granted on-chain. Breaking changes: • Transient allowance for inputs to sender has been removed from the Solidity library (`library-solidity`); contracts relying on this allowance behaviour will no longer work as before. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.14.3 https://github.com/zama-ai/fhevm/releases/tag/v0.14.3 Fri, 09 Oct 2026 13:15:18 GMT fhEVM v0.14.3 adds environment-variable-driven e2e coprocessor config generation for the test suite.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Generates e2e coprocessor configuration from environment variables in the test suite, enabling automated and CI-friendly stack setup.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.14.2 https://github.com/zama-ai/fhevm/releases/tag/v0.14.2 Fri, 02 Oct 2026 15:55:52 GMT fhEVM v0.14.2 adds BNB chain support to host-contract chainIds and improves scalar operand handling.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Adds BNB to the supported `chainIds` in host-contracts, enabling FHE workflows on the BNB chain.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Improves scalar operand handling in host-contracts for FHE arithmetic operations. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.13.4 https://github.com/zama-ai/fhevm/releases/tag/v0.13.4 Fri, 04 Sep 2026 14:57:47 GMT fhEVM v0.13.4 backports the Polygon CLI and expands the relayer to return all user-decrypt shares. • Backports the Polygon CLI to the 0.13.x release line, enabling Polygon-targeted workflows on the stable branch. • Relayer now returns all user-decrypt shares per request, rather than a subset. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.14.1 https://github.com/zama-ai/fhevm/releases/tag/v0.14.1 Tue, 01 Sep 2026 02:17:15 GMT fheVM v0.14.1 adds Polygon mainnet chain support and KMS canonical mirror tasks for host contracts. • Adds tasks to mirror the canonical KMS context and epoch onto replica chains in host contracts. • Adds Polygon mainnet chain configuration to the SDK and Solidity library. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.14.0 https://github.com/zama-ai/fhevm/releases/tag/v0.14.0 Fri, 14 Aug 2026 08:08:25 GMT fhEVM v0.14.0 adds KMS epoch lifecycle, unified EIP-712 decryption, confidential bridging, and new Solidity FHE APIs • Adds `destroyKmsEpoch` to the KMS connector for epoch destruction as part of the KMS context/epoch lifecycle, alongside single-in-flight enforcement, signature-checked epoch activation confirmations, and getters for context-switch monitoring. • Adds `deployProtocolConfigFromMigration`, `deployKMSGenerationFromMigration`, `upgradeKMSGeneration`, and `verify` Hardhat tasks as the new required deployment and rollout path replacing the removed KMSGeneration Gateway migration path. • Adds `--seed-start-block` flag to the host-listener poller for controlling coprocessor block replay start point. • Adds FHE.toExternal(...) for all encrypted types, enabling conversion of any encrypted value to an external representation from Solidity. • Adds FHE.mulDiv(...) for widened multiply-divide operations on encrypted integers, with HCU accounting including the scalar-type check for `fheMulDiv`. • Ships unified EIP-712 user decryption via signDecryptionPermit(), merging self and delegated decryption into one request model with per-handle ownership, `durationSeconds`, protocol-versioned permits, and ERC-1271 smart-account signature support. • Adds the `ConfidentialBridge` (LayerZero-based) for encrypted handle bridging across chains, including bridge events, Solidity helper APIs, deploy/prepareUpgrade tasks, LZ-delegate auto-resync to the ACL owner, and post-upgrade endpoint verification. • Adds new reinitializer versions for `FHEVMExecutor`, `HCULimit`, and `ProtocolConfig` host/gateway contracts with protocol storage for KMS epochs, context anchors, decryption invalidation, and confidential bridge configuration. • Adds per-context KMS threshold setters with caps on threshold and signer set for hardened decryption consensus. • Adds SNS/S3 ciphertext migration support with dedicated concurrency and DB pool controls, stalled-error backoff, and a wave1 migration verification script. • Adds ciphertext attestation plumbing and shadow verification in the KMS connector, including a shared ciphertext-attestation crate, embedded ciphertext format, coprocessor registry refresh, and S3 material verification. • Adds automatic protocol/WASM version resolution and bundled TFHE to the SDK, with cleartext mode, multi-version host-contracts support, and a narrower public API surface. • Adds full block payloads with adaptive Redis drain and stalled dependency-chain parking to the coprocessor for improved migration and live-operation reliability. • Adds replay of quorum-accepted input proofs and drift-recovery hardening with documented quorum requirements to the coprocessor. • Adds latency/gap metrics to the coprocessor for observability of block-processing performance. Breaking changes: • The signDecryptionPermit() API is now the required SDK decryption permit path; `durationDays` is replaced by `durationSeconds`, permit objects carry a protocol version, and several low-level SDK exports were removed in favor of high-level encrypt/decrypt/sign actions. • User-decryption authorization moves to the unified v2 flow; legacy on-chain request shapes remain only for the deprecation window. • The KMSGeneration Gateway migration path was removed; deployment and rollout flows must use `deployProtocolConfigFromMigration`, `deployKMSGenerationFromMigration`, `upgradeKMSGeneration`, `verify` tasks, and the KMS/wave1 migration verification scripts. • The coprocessor's Ethereum chain-ID flag was renamed to the canonical protocol-config chain ID; `host_chains` seeding is now declarative — coprocessor configuration must be updated accordingly. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.13.0 https://github.com/zama-ai/fhevm/releases/tag/v0.13.0 Thu, 11 Jun 2026 18:10:12 GMT fhEVM v0.13.0 adds PRSS key shares re-sharing, FHE handle ACL deny lists, and new hardhat deployment scripts • Adds `PRSSInit` and `KeyReshareSameSet` flows for threshold key share regeneration. • Adds `IsAccountDenied` function to library-solidity to check account restrictions. • Adds ACL deny list support in host-contracts to block specific accounts from persisting FHE handles. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.12.0 https://github.com/zama-ai/fhevm/releases/tag/v0.12.0 Wed, 08 Apr 2026 15:51:28 GMT fhEVM v0.12.0 adds per-block HCU metering, context-aware decryptions, and coprocessor state revert. • Adds `--ciphertext-commits-address` flag to the gateway listener for opt-in ciphertext drift detection via local digest comparison against on-chain consensus • Adds `revert_coprocessor_db_state.sql` script packaged in the db-migration Docker image to revert a coprocessor database to a previous block number • Adds HCULimit contract with configurable per-block, per-transaction, and per-transaction-depth Homomorphic Compute Unit limits and a whitelist mechanism for privileged callers Breaking changes: • MultichainACL.sol, MultichainACLChecks.sol, and IMultichainACL.sol are removed entirely from gateway-contracts • isUserDecryptionReady signature changed — the address userAddress parameter was removed; old signature preserved via backward-compat overload but is deprecated • FHEVMExecutor prepends COMPUTATION_DOMAIN_SEPARATOR ("FHE_comp") and appends blockhash(block.number-1) + block.timestamp to handle hashing • New HCULimit contract required — FHEVMExecutor REINITIALIZER_VERSION bumped to 3. Initialization requires hcuCapPerBlock, maxHCUDepthPerTx, and maxHCUPerTx parameters. • ACL REINITIALIZER_VERSION bumped to 4 — ExpirationDateBeforeOneHour error replaced by ExpirationDateInThePast • ECDSA.sol renamed to FhevmECDSA.sol — import path changed from cryptography/ECDSA.sol to cryptography/FhevmECDSA.sol, library renamed from ECDSA to FhevmECDSA • Tenants table removed from DB • Legacy tfhe-worker gRPC endpoint removed Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.11.0 https://github.com/zama-ai/fhevm/releases/tag/v0.11.0 Fri, 13 Feb 2026 18:56:27 GMT fhEVM v0.11.0 adds GPU acceleration for ZK proofs, host-listener poller mode, Confidential Tokens Registry with ERC7984, and Operator Staking system. • `gpu` acceleration is available for ZK proof verification, Switch-and-Squash (SnS), and re-randomisation in the coprocessor. • New `host-listener` poller mode provides an alternative to WebSocket-based event listening for the coprocessor scheduler. • Introduces Confidential Tokens Registry and ERC7984 upgradeable wrapper contracts for token management. • Adds a new Operator Staking system using ERC4626-based contracts, including reward distribution logic. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.10.6 https://github.com/zama-ai/fhevm/releases/tag/v0.10.6 Wed, 07 Jan 2026 06:13:04 GMT Adds coprocessor dependence chain release mechanism • Adds `coprocessor` mechanism to release dependence chains when no progress occurs Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.10.5 https://github.com/zama-ai/fhevm/releases/tag/v0.10.5 Mon, 29 Dec 2025 10:13:54 GMT fhEVM v0.10.5 adds a non-blocking distributed locking mechanism to tfhe-worker. • Adds a non-blocking, distributed locking mechanism in `tfhe-worker`. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.10.2 https://github.com/zama-ai/fhevm/releases/tag/v0.10.2 Tue, 09 Dec 2025 19:11:45 GMT Adds `--only-catchup-loop` mode to the coprocessor host-listener CLI. • Coprocessor host-listener gains a new `--only-catchup-loop` flag to run exclusively in catch-up mode. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.13 https://github.com/zama-ai/fhevm/releases/tag/v0.9.13 Fri, 14 Nov 2025 12:49:09 GMT Introduces `FHE.checkSignatures` for verifying homomorphic signatures and refactors `ZamaConfig.sol`. • Adds `FHE.checkSignatures` to verify encrypted data signatures Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.10 https://github.com/zama-ai/fhevm/releases/tag/v0.9.10 Wed, 05 Nov 2025 07:56:44 GMT Replaces the requestDecryption API with a new codegen feature for managing decryption requests • Introduces a new codegen feature that replaces the previous `requestDecryption` method • Removes the legacy `requestDecryption` function from the library API Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.6 https://github.com/zama-ai/fhevm/releases/tag/v0.9.6 Mon, 03 Nov 2025 13:12:31 GMT Adds `PRSSInit` and `KeyReshareSameSet` flows for key management and coprocessor metrics • Adds `PRSSInit` and `KeyReshareSameSet` flows to handle private random shared secret initialization and key resharing within the same set. • Exposes new metrics for the gw-listener component in the coprocessor to support observability. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.5 https://github.com/zama-ai/fhevm/releases/tag/v0.9.5 Wed, 29 Oct 2025 12:45:50 GMT fhEVM v0.9.5 adds a function to update operators in gateway contracts. • `feat(gateway-contracts): add function to update operators` Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.2 https://github.com/zama-ai/fhevm/releases/tag/v0.9.2 Fri, 17 Oct 2025 16:15:36 GMT fhEVM v0.9.2 exposes `coprocessor_threshold` config variable for coprocessor configuration. • Exposes new `coprocessor_threshold` config variable to control coprocessor behavior. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.1 https://github.com/zama-ai/fhevm/releases/tag/v0.9.1 Fri, 17 Oct 2025 08:39:23 GMT Adds per-transaction execution metrics for fhEVM. • `gw-listener` accepts `bucket.domain` URLs for object storage integration. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.9.0 https://github.com/zama-ai/fhevm/releases/tag/v0.9.0 Mon, 06 Oct 2025 10:04:24 GMT fhEVM v0.9.0 adds Gateway-triggered keygen, PauserSet contract, and in-event decryption shares • Adds `Gateway` method to trigger key generation directly • Moves user decryption share delivery from on-chain storage to event data emitted by the Gateway • Introduces `PauserSet` contract for pausing logic Breaking changes: • Gateway `check...` functions replaced by non-reverting `is...` boolean getters • `contractsChainId` field removed from user decryption request EIP712 struct Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.8.0 https://github.com/zama-ai/fhevm/releases/tag/v0.8.0 Tue, 02 Sep 2025 10:19:46 GMT fHEVM v0.8.0 adds a new KMS connector, compressed ciphertext support for SnS/KMS, and protocolId() to SepoliaConfig. • New KMS connector integration • Compressed ciphertext support for the Secret Number Service (SnS) worker and Key Management System (KMS) • Added protocolId() function in SepoliaConfig to follow ERC standards • Added extraData generic field to gateway functions, events, and signed structs Breaking changes: • Changed callback function expected by Oracle following ERC standards • Changed storage layout for the library following ERC standards Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.7.7 https://github.com/zama-ai/fhevm/releases/tag/v0.7.7 Mon, 14 Jul 2025 07:29:40 GMT Adds multi-pod coordination for kms-connector • `feat(kms-connector): multi-pod connectors coordination` Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm https://github.com/zama-ai/fhevm/releases/tag/v0.7.0 https://github.com/zama-ai/fhevm/releases/tag/v0.7.0 Wed, 18 Jun 2025 12:48:52 GMT fhEVM v0.7.0 introduces Zama Protocol with Gateway orchestration and FHE.requestDecryption • Adds `Gateway` as a core component to orchestrate protocol operations • Enforces coprocessor-side input verification for enhanced security • Coprocessors now prepare ciphertexts for the decryption pipeline • Restructures and modernizes the Solidity library for the new architecture • Adds `FHE.requestDecryption` with `msg.value` support, replacing deprecated `GatewayCaller` • Introduces per-transaction operation limits, replacing previous per-block limits Breaking changes: • Library renamed from `TFHE` to `FHE` • `ebytesXXX` types removed • `einput` replaced with `externalEuintXXX`, `externalEbool`, and `externalEaddress` • Previous per-block limit replaced by per-transaction operation limits Full history on Cyber Toolchain: https://cybertoolchain.io/tools/fhevm