The `Toll` contract is an access control module that allows authorized users to grant or revoke access to certain functions via `kiss` and `diss`. It tracks tolled addresses, ensuring only those with granted access can call restricted functions using the `toll` modifier.

The `Auth` contract provides access control, allowing only authorized addresses to call protected functions. It initializes with one authorized address and offers `rely` and `deny` functions to grant or revoke access, respectively. It tracks and verifies authorization status.

The `IAuth` interface defines an authorization system for smart contracts. It includes functionality to grant and revoke authorization to addresses, check if an address is authorized, and retrieve a list of authorized addresses. It emits events for granting and renouncing authorization and provides a deprecated alternative check for authorization status.

The `IChronicle` interface defines an oracle protocol with methods to retrieve an oracle's identifier, current value, and the age of the value. It includes functions to safely check for the existence of a value, returning a boolean alongside the value and its age.

The `IToll` interface defines a system for managing access control, where certain addresses can be granted or renounced a "toll" (likely a form of permission). It includes functions to grant (`kiss`) or revoke (`diss`) this toll, check if an address is tolled (`tolled`), and retrieve a list of all tolled addresses. It also emits events for granting and renouncing tolls, and maintains a deprecated function (`bud`) for checking toll status.

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The Chronicle Std Library provides a set of contracts used throughout the Chronicle Protocol