/**
 * Interface for accumulator state. This should be implemented by the persistence layer that stores the accumulator
 * members. It is advised to update the state when elements are added or removed from the accumulator.
 */
export interface IAccumulatorState {
    add(element: Uint8Array): Promise<void>;
    remove(element: Uint8Array): Promise<void>;
    /**
     * Check if element is a member of the state.
     * @param element
     */
    has(element: Uint8Array): Promise<boolean>;
}
/**
 * Additional interface for universal accumulator to expose a method that allows to iterate over the
 * accumulator members.
 */
export interface IUniversalAccumulatorState extends IAccumulatorState {
    elements(): Promise<Iterable<Uint8Array>>;
}
export interface IKBUniversalAccumulatorState extends IAccumulatorState {
    /**
     * Whether this element is in the domain (could be a member or not)
     * @param element
     */
    inDomain(element: Uint8Array): Promise<boolean>;
    /**
     * Takes an element not in the domain and adds it.
     * @param element
     */
    addToDomain(element: Uint8Array): Promise<void>;
}
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