/**
 * Defines an interface for services which are able to store branch updates.
 *
 * An "update" is a simplified interface where updates are encoded as strings and can be applied in any order
 * and multiple times.
 */
export interface UpdatesStore {
    /**
     * Gets the list of updates for the given branch.
     * @param branch The branch.
     */
    getUpdates(branch: string): Promise<StoredUpdates>;
    /**
     * Adds the given updates to the given branch.
     * @param branch The branch that the updates should be added to.
     * @param updates The updates that should be added.
     */
    addUpdates(branch: string, updates: string[]): Promise<AddUpdatesResult>;
    /**
     * Deletes all the updates for the given branch.
     * @param branch The branch.
     */
    clearUpdates(branch: string): Promise<void>;
    /**
     * Replaces the given set of updates with a new set of updates.
     * Useful for when updates have been merged and the old ones should be replaced by the new one(s).
     * @param branch The branch.
     * @param updatesToRemove The updates that should be moved. Only valid if the result from getUpdates() is used.
     * @param updatesToAdd The updates that should be added.
     */
    replaceUpdates(branch: string, updatesToRemove: StoredUpdates, updatesToAdd: string[]): Promise<ReplaceUpdatesResult>;
}
export interface StoredUpdates {
    updates: string[];
    timestamps: number[];
}
export type AddUpdatesResult = AddUpdatesSuccess | AddUpdatesFailure;
export interface AddUpdatesSuccess {
    success: true;
    /**
     * The current size of the branch.
     */
    branchSizeInBytes?: number;
}
export type AddUpdatesFailure = MaxSizeReachedFailure;
export interface MaxSizeReachedFailure {
    success: false;
    errorCode: 'max_size_reached';
    /**
     * The branch that the updates were being added to.
     */
    branch: string;
    /**
     * The maximum allowed size for the branch.
     */
    maxBranchSizeInBytes: number;
    /**
     * The size that the branch would be at if the updates were added.
     */
    neededBranchSizeInBytes: number;
}
export type ReplaceUpdatesResult = ReplaceUpdatesSuccess | ReplaceUpdatesFailure;
export interface ReplaceUpdatesSuccess {
    success: true;
}
export type ReplaceUpdatesFailure = MaxSizeReachedFailure;
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