export interface PrwatchTarget {
    readonly pullRequestNumber: number;
    readonly repo: string;
}
export interface PrwatchRegistration extends PrwatchTarget {
    readonly callId: string;
}
interface PrwatchRecord {
    readonly callId: string;
    readonly cancelled: boolean;
}
export interface PrwatchRegistryState {
    readonly watches: Readonly<Record<string, PrwatchRecord>>;
}
export declare function prwatchKey(input: PrwatchTarget): string;
export declare function emptyPrwatchRegistry(): PrwatchRegistryState;
export declare function registerPrwatchInState(state: PrwatchRegistryState, input: PrwatchRegistration): PrwatchRegistryState;
export declare function isPrwatchCancelledInState(state: PrwatchRegistryState, input: PrwatchRegistration): boolean;
export declare function cancelPrwatchInState(state: PrwatchRegistryState, input: PrwatchTarget): {
    readonly deleted: boolean;
    readonly state: PrwatchRegistryState;
};
export declare function completePrwatchInState(state: PrwatchRegistryState, input: PrwatchRegistration): PrwatchRegistryState;
export declare function registerActivePrwatch(input: PrwatchRegistration): Promise<void>;
export declare function prwatchWasCancelled(input: PrwatchRegistration): Promise<boolean>;
export declare function finishPrwatch(input: PrwatchRegistration): Promise<void>;
export declare function deletePrwatch(input: PrwatchTarget): Promise<boolean>;
export {};