Changelog - Base Documentation

This directory holds per-hardfork, per-feature migration notes for the Base precompile standard. Each entry is a focused, code-forward changelog for one scoped feature change that crosses a hardfork boundary: the API, function, event, and error deltas behind a single line item in a hardfork’s release notes (for example, Cobalt’s “Schedule Multiplier Updates”). This complements the product references in docs/. docs/ describes how a product works today. changelog/ describes what changes at a hardfork and how to migrate across it.

Hardfork ordinals

Ordinal	Hardfork	Status
`01`	Beryl	Live
`02`	Cobalt	Upcoming

Index

Grouped by hardfork, one collapsible section per hardfork, newest first.

Cobalt (upcoming) — ordinal 02

Product(s)	Change	Affected interfaces	Entry
B20 Asset	Schedule Multiplier Updates (ERC-8056)	`src/interfaces/IB20Asset.sol`	02_Cobalt_B20Asset_multiplier
B20 Asset, B20 Stablecoin	Seize surface + `burnBlocked` deprecation	`src/interfaces/IB20.sol` (shared surface) → inherited by `src/interfaces/IB20Asset.sol`, `src/interfaces/IB20Stablecoin.sol`	02_Cobalt_B20_seize
PolicyRegistry	Composite Policies (UNION/INTERSECT)	`src/interfaces/IPolicyRegistry.sol`	02_Cobalt_PolicyRegistry_composite_policy

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​Hardfork ordinals

​Index

Hardfork ordinals

Index