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kona-client is the bare-metal fault proof program that executes the OP Stack state transition on a MIPS prover. It is the primary fault proof program for OP Stack chains. See the fault proof specs.
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LatestStable
v1.7.0

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Overview

[!IMPORTANT] This is a major release of kona-client containing fault-proof soundness fixes, derivation alignment with op-node, and interop groundwork. It is a required upgrade for all chains that run kona-client fault proofs.
Note: Lagoon (interop) is not yet live in production. Changes to those code paths in this release are preparation for future functionality and do not affect operators today.View full release on GitHub →
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Stable
v1.6.0
⚠️ This release is a critical security fix and is a required update for users.
View full release on GitHub →
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Stable
v1.5.2

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Overview

This is a patch release of kona-client. It bumps FPVM precompile oracle gas for Glamsterdam (EIP-7904), tightens the interop trace-extension boundary to match op-program, and surfaces malformed output-root preimages explicitly. It is required before Glamsterdam activates on L1; otherwise optional.View full release on GitHub →
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Stable
v1.5.1

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Overview

[!IMPORTANT] This release assumes MSRV >= 1.94. You may use https://github.com/ethereum-optimism/optimism/releases/tag/kona-client%2Fv1.2.14 for users not supporting this rust version yet.
[!CAUTION] ⚠️ This release is a critical security fix and is a required update for users kona-client.
This is a patch release of kona-client that includes important bug fixes for state trie handling of destroyed accounts.View full release on GitHub →
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Stable
v1.2.14

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Overview

⚠️ This release is a critical security fix and is a required update for users of kona-client/v1.2.13.This is a patch release of kona-client that includes important bug fixes for state trie handling of destroyed accounts.View full release on GitHub →