From 33183c2f5a038e98afa3b39794b2674214ebe508 Mon Sep 17 00:00:00 2001 From: roethke Date: Tue, 10 Feb 2026 13:11:58 -0800 Subject: [PATCH 1/2] added fault proof diversity section, config changes for mainnet + sepolia --- .../configuration-changelog.mdx | 2 ++ .../transaction-finality.mdx | 17 +++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/docs/base-chain/network-information/configuration-changelog.mdx b/docs/base-chain/network-information/configuration-changelog.mdx index 92eb2830c..57db8b016 100644 --- a/docs/base-chain/network-information/configuration-changelog.mdx +++ b/docs/base-chain/network-information/configuration-changelog.mdx @@ -10,6 +10,7 @@ This page tracks configuration changes to the Base networks, including updates t | Date | Change | Documentation | |------|--------|---------------| +| TBD | Upgrade 18: Cannon + Kona fault proof support | [Fault Proof Diversity](/base-chain/network-information/transaction-finality#fault-proof-diversity) | | February 4, 2026 | Increased EIP-1559 Denominator to 125 | [EIP-1559 Fee Parameters](/base-chain/network-information/network-fees#eip-1559-fee-parameters) | | February 2, 2026 | Increased Minimum Base Fee to 2,000,000 wei | [Minimum Base Fee](/base-chain/network-information/network-fees#minimum-base-fee) | | January 22, 2026 | Increased Minimum Base Fee to 1,000,000 wei | [Minimum Base Fee](/base-chain/network-information/network-fees#minimum-base-fee) | @@ -26,6 +27,7 @@ This page tracks configuration changes to the Base networks, including updates t | Date | Change | Documentation | |------|--------|---------------| +| TBD | Upgrade 18: Cannon + Kona fault proof support | [Fault Proof Diversity](/base-chain/network-information/transaction-finality#fault-proof-diversity) | | November 20, 2025 | Enabled Minimum Base Fee (200,000 wei) | [Minimum Base Fee](/base-chain/network-information/network-fees#minimum-base-fee) | | September 3, 2025 | Enabled Per-Transaction Gas Maximum | [Per-Transaction Gas Maximum](/base-chain/network-information/block-building#per-transaction-gas-maximum) | | February 25, 2025 | Enabled Flashblocks | [Flashblocks](/base-chain/network-information/block-building#flashblocks) | diff --git a/docs/base-chain/network-information/transaction-finality.mdx b/docs/base-chain/network-information/transaction-finality.mdx index 01ae09508..7551cf1aa 100644 --- a/docs/base-chain/network-information/transaction-finality.mdx +++ b/docs/base-chain/network-information/transaction-finality.mdx @@ -70,6 +70,23 @@ This system requires only a one honest party to remain secure. Base will always Note: if the dispute game is won by a challenger, the state of the L2 chain does not reorg. The output proposal is marked invalid and any withdrawals that were proven against it cannot finalize. Those withdrawals would need to be re-proven against a different, valid output root. +### Fault Proof Diversity + +As part of [Upgrade 18], Base supports two independent fault proof implementations running in parallel: + +| Game Type | Implementation | Description | +|-----------|----------------|-------------| +| `CANNON` (0) | op-program (Go) | Original fault proof using `op-node` + `op-geth` | +| `CANNON_KONA` (8) | kona-client (Rust) | Alternate fault proof using `kona-node` + `op-reth` | + +Both implementations use Cannon as the Fault Proof Virtual Machine (FPVM) and share the same dispute game contract (`FaultDisputeGame.sol`). This diversity increases redundancy in the fault proof layer—if a bug affects one implementation, the other can still secure the network. + + +Games of either type can be created after upgrade, but withdrawals continue to use the respected game type configured by governance. + + +[Upgrade 18]: https://docs.optimism.io/notices/upgrade-18 + ## FAQ From 1229b1caef4705b44c54f2049e5f55e461f4d0e4 Mon Sep 17 00:00:00 2001 From: roethke Date: Tue, 10 Feb 2026 13:16:13 -0800 Subject: [PATCH 2/2] update date --- .../network-information/configuration-changelog.mdx | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/base-chain/network-information/configuration-changelog.mdx b/docs/base-chain/network-information/configuration-changelog.mdx index 57db8b016..a85a8eaa1 100644 --- a/docs/base-chain/network-information/configuration-changelog.mdx +++ b/docs/base-chain/network-information/configuration-changelog.mdx @@ -10,7 +10,7 @@ This page tracks configuration changes to the Base networks, including updates t | Date | Change | Documentation | |------|--------|---------------| -| TBD | Upgrade 18: Cannon + Kona fault proof support | [Fault Proof Diversity](/base-chain/network-information/transaction-finality#fault-proof-diversity) | +| February 10, 2026 | Upgrade 18: Cannon + Kona fault proof support | [Fault Proof Diversity](/base-chain/network-information/transaction-finality#fault-proof-diversity) | | February 4, 2026 | Increased EIP-1559 Denominator to 125 | [EIP-1559 Fee Parameters](/base-chain/network-information/network-fees#eip-1559-fee-parameters) | | February 2, 2026 | Increased Minimum Base Fee to 2,000,000 wei | [Minimum Base Fee](/base-chain/network-information/network-fees#minimum-base-fee) | | January 22, 2026 | Increased Minimum Base Fee to 1,000,000 wei | [Minimum Base Fee](/base-chain/network-information/network-fees#minimum-base-fee) | @@ -27,7 +27,7 @@ This page tracks configuration changes to the Base networks, including updates t | Date | Change | Documentation | |------|--------|---------------| -| TBD | Upgrade 18: Cannon + Kona fault proof support | [Fault Proof Diversity](/base-chain/network-information/transaction-finality#fault-proof-diversity) | +| February 10, 2026 | Upgrade 18: Cannon + Kona fault proof support | [Fault Proof Diversity](/base-chain/network-information/transaction-finality#fault-proof-diversity) | | November 20, 2025 | Enabled Minimum Base Fee (200,000 wei) | [Minimum Base Fee](/base-chain/network-information/network-fees#minimum-base-fee) | | September 3, 2025 | Enabled Per-Transaction Gas Maximum | [Per-Transaction Gas Maximum](/base-chain/network-information/block-building#per-transaction-gas-maximum) | | February 25, 2025 | Enabled Flashblocks | [Flashblocks](/base-chain/network-information/block-building#flashblocks) |