by Unity Nodes
MPC (Chain Signatures)Stable

MPC (Chain Signatures) 3.19.0

3.19.0github.com

This release removes presignatures from the ECDSA threshold signing process, improves whitelist and enforcement support in Foreign Chain Transactions, takes the attestation expiry from collateral, and bumps nearcore to…

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  • The latest release in the 3.19 line.

MPC 3.19.0

This release removes presignatures from the ECDSA threshold signing process, improves whitelist and enforcement support in Foreign Chain Transactions, takes the attestation expiry from collateral, and bumps nearcore to include the fixes recently released in 2.14.1

🚀 Features

  • #4951(@pbeza): (contract) Require an attested destination node to start a node migration (#4951)

  • #4990(@gilcu3): (node) Robust ecdsa stub signing without presignatures (#4990)

  • #5000(@gilcu3): (node) Remove support for presignature generation (#5000)

  • #4872(@SimonRastikian): (contract) Report pending parameter votes by proposal hash in state() (#4872)

  • #4910(@barakeinav1): (contract) [breaking] Take the attestation expiry from the collateral (#4910)

  • #5052(@haiyuechen-nearone): (node) Rerun the foreign chain probe when the whitelist changes (#5052)

  • #5067(@gilcu3): (devnet) Prepay attestations and use existing transport patterns (#5067)

  • #5074(@haiyuechen-nearone): (node) Log only problems in each foreign chain probe round, then one summary line (#5074)

🐛 Bug Fixes

  • #4992(@anodar): Provider matching (#4992)

  • #4952(@pbeza): (contract) Stop clean_invalid_attestations from deleting nodes in use (#4952)

  • #5066(@gilcu3): Add RUSTSEC-2026-0441 exception, pin-utils is unmaintained (#5066)

  • #5041(@anodar): Resend foreign-chain registration until the contract reflects it (#5041)

🚜 Refactor

  • #4981(@anodar): Drop rpc quorum statuses for non-whitelisted chains (#4981)

  • #4869(@SimonRastikian): (contract) Move parameter votes from RunningContractState to MpcContract (#4869)

  • #4870(@SimonRastikian): (contract) Store parameter votes hash-only via Votes (#4870)

  • #4247(@SimonRastikian): Redundant code extermination in running.rs (#4247)

  • #4961(@SimonRastikian): (primitives) Move BlockHeight into mpc-primitives and re-export it from near-contract-transport (#4961)

  • #5051(@haiyuechen-nearone): (node) Split the foreign chain probe into modules (#5051)

  • #4953(@pbeza): (contract) Take TLS-key ownership from the node alone (#4953)

  • #4964(@SimonRastikian): (contract) Type key event heights and timeout with BlockHeight (#4964)

  • #5006(@SimonRastikian): (node) Type node-side block heights and deltas with BlockHeight and BlockCount (#5006)

  • #5031(@pbeza): (contract) Simplify the node types and their tests (#5031)

  • #5071(@gilcu3): (crypto) Presign_and_sign removal step 1 (#5071)

  • #5072(@gilcu3): (crypto) Remove presign_and_sign part 2 (#5072)

  • #5053(@haiyuechen-nearone): (node) Fold the whitelist verifier into the foreign chain probe (#5053)

  • #5107(@haiyuechen-nearone): (interface) Move the foreign chain hash, provider and chain support types into their own files (#5107)

  • #5108(@haiyuechen-nearone): (interface) Move the foreign tx request and RPC request types into their own files (#5108)

  • #5131(@SimonRastikian): (crypto) Move OT protocols into their own ecdsa/ot module (#5131)

📚 Documentation

  • #4972(@netrome): Tidy up the top level readme (#4972)

  • #5007(@pbeza): Tell agents to avoid as numeric conversions (#5007)

  • #4897(@barakeinav1): Update the TEE verifier runbook for rotations (#4897)

  • #5043(@barakeinav1): Clarify upgrade order and node/contract compatibility in RELEASES.md (#5043)

  • #4208(@AmHelm): Added design doc for debug information service (#4208)

  • #5026(@gilcu3): (crypto) Update docs after Cait-Sith presignature removal (#5026)

  • #5084(@kevindeforth): Update engineering standards about wire type and internal type separation (#5084)

  • #5129(@haiyuechen-nearone): Ask for files under 500 lines in AGENTS.md (#5129)

🧪 Testing

  • #4986(@barakeinav1): (localnet) Check localnet genesis protocol version matches nearcore (#4986)

  • #4941(@netrome): E2E test for leader failover (#4941)

  • #5064(@gilcu3): Ensure participants have valid attestations after contract initialization (#5064)

  • #5012(@barakeinav1): Run the contract and a cluster at mainnet's protocol version (#5012)

⚙️ Miscellaneous Tasks

  • #4994(@SimonRastikian): Update contract migrations after 3.18.0 release (#4994)

  • #4998(@gilcu3): Address libz-sys advisory (#4998)

  • #5001(@gilcu3): (crypto) Remove presignature support from robust ecdsa stub (#5001)

  • #5016(@gilcu3): Ignore RUSTSEC-2026-0424 wasmtime (#5016)

  • #5022(@gilcu3): Switch to opus 5.5 for reviews to improve efficiency (#5022)

  • #4912(@barakeinav1): Remove support for responder keys (#4912)

  • #5024(@gilcu3): (crypto) Benchmark only presign_and_sign for OT-based ECDSA (#5024)

  • #5032(@dependabot[bot]): Bump the github-actions group across 1 directory with 4 updates (#5032)

  • #5033(@dependabot[bot]): Bump httpmock from 0.8.3 to 0.9.0 (#5033)

  • #5025(@gilcu3): (crypto) Remove presignatures from Cait-Sith (#5025)

  • #5040(@gilcu3): Bump dcap-qvl to benefit from upstream changes in attestation-cli (#5040)

  • #4747(@anodar): Update release process documentation and release workflow (#4747)

  • #5082(@gilcu3): Bump near-sdk so that minimum protocol version is 85 again (#5082)

  • #5103(@pbeza): Bump rustix to 1.1.6 for RUSTSEC-2026-0486 (#5103)

  • #5106(@gilcu3): Bump nearcore to 2.14.1 (#5106)

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