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ActivationRegistry

The ActivationRegistry tracks which Base features are live. This is managed exclusive by the Base and integrators don't typically need to query it. See IActivationRegistry for the full Solidity interface.

Feature IDs

Feature IDs are opaque bytes32 values. By convention each is the keccak256 digest of a human-readable feature name (e.g., keccak256("base.b20_asset")); a feature ID is permanently bound to its semantic and is never recycled.

The canonical IDs in use today, defined in ActivationRegistryFeatureList:

Constant Preimage Value
B20_ASSET "base.b20_asset" 0xcdcc772fe4cbdb1029f822861176d09e646db96723d4c1e82ddfdeb8163ef54c
B20_STABLECOIN "base.b20_stablecoin" 0xecfa0def2c10020caaf65e6155aa69c84b24892aaef76eeac52e0e2b3a0b8601
POLICY_REGISTRY "base.policy_registry" 0xb582ebae03f16fee49a6763f78df482fb11ae73f103ed0d330bbe556aa90a43f

User Flows

Activate Feature

The admin marks a feature as live; downstream consumers can immediately observe the change.

sequenceDiagram
    participant Admin
    participant ActivationRegistry

    Admin->>ActivationRegistry: activate(featureId)
    Note over ActivationRegistry: features[featureId] = true
    ActivationRegistry-->>Admin: emit FeatureActivated(feature, caller)
Loading

Reverts: Unauthorized (non-admin caller), AlreadyActivated, DelegateCallNotAllowed / StaticCallNotAllowed.

Deactivate Feature

The admin marks a previously-active feature as inactive.

sequenceDiagram
    participant Admin
    participant ActivationRegistry

    Admin->>ActivationRegistry: deactivate(featureId)
    Note over ActivationRegistry: features[featureId] = false
    ActivationRegistry-->>Admin: emit FeatureDeactivated(feature, caller)
Loading

Reverts: Unauthorized, AlreadyDeactivated, DelegateCallNotAllowed / StaticCallNotAllowed.