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Documentation Index

Fetch the complete documentation index at: https://docs.optimism.io/llms.txt

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op-challenger is a modular dispute game agent that monitors and challenges invalid fault proof games on-chain. See the fault proof specs.
April 15, 2026
LatestStable
v1.9.1

Overview

This is a patch release of op-challenger that includes important security fixes for chains running permissionless fault proofs, along with other bug fixes. It is a required upgrade for all users.View full release on GitHub →
January 21, 2026
Stable
v1.9.0

Overview

This is a minor release of op-challenger that includes important bug fixes. It is a required upgrade for all users.View full release on GitHub →
January 9, 2026
Stable
v1.8.0

Overview

This release of op-challenger includes support for Upgrade 18, plus minor bug fixes and improvements. It is a required upgrade for all users.View full release on GitHub →
November 6, 2025
Stable
v1.7.0

Overview

This is a minor release of op-challenger, it’s an optional upgrade preparing for for an upcoming refactor of the dispute game contracts to be reusable across chainsView full release on GitHub →
October 7, 2025
Stable
v1.6.0

Overview

This release of op-challenger adds support for the Ethereum Fusaka upgrade. It’s a required upgrade.View full release on GitHub →
June 12, 2025
Stable
v1.5.1

Overview

This is a minor release of op-challenger that includes important bug fixes. It is a required upgrade for all users.View full release on GitHub →
June 4, 2025
Stable
v1.5.0

Overview

This release of op-challenger adds support for a new version of Cannon that is compatible with Go 1.23. It is a required upgrade for all users.View full release on GitHub →
April 15, 2025
Stable
v1.4.0

Overview

This release of op-challenger fixes a medium severity bug related to EIP-4844 blob data handling. It is a required upgrade for all users.View full release on GitHub →
March 20, 2025
Stable
v1.3.3

Overview

This is a minor release of op-challenger that includes a fix to improve stability. It is an optional upgrade.View full release on GitHub →
March 3, 2025
Stable
v1.3.2

Overview

This is a minor release of op-challenger that includes important bug fixes. It is a required upgrade for all users.View full release on GitHub →
February 12, 2025
Stable
v1.3.1

Overview

This is a minor release of op-challenger includes support for the Pectra hard fork on L1. It is a required upgrade for all users prior to Pectra activating on the L1 chain.View full release on GitHub →
December 9, 2024
Stable
v1.3.0

Overview

This is a minor release of op-challenger that includes minor new features and bug fixes. It is an optional upgrade for all users.View full release on GitHub →
November 5, 2024
Stable
v1.2.0

Overview

This is a minor release of op-challenger that includes minor new features and bug fixes. It is an optional upgrade for all users.View full release on GitHub →
September 26, 2024
Stable
v1.1.2

Overview

This is a minor release of op-challenger with minor new features. It is an optional upgrade for all users.View full release on GitHub →
September 11, 2024
Stable
v1.1.0

Overview

This is a minor release of op-challenger that includes support for the Granite hard fork changes and bug fixes. It is a required upgrade for all users.View full release on GitHub →
June 15, 2024
Stable
v1.0.1

Overview

This is a minor release of op-challenger that includes minor new features. It is an optional upgrade for all users.View full release on GitHub →
June 10, 2024
Stable
v1.0.0

Overview

This is the 1.0 release of op-challenger, an implementation of the honest actor algorithm for fault dispute games. To learn more about dispute games, visit the fault proof specs.🚢 Docker Image:View full release on GitHub →