/**
 * PermissionService — centralized permission checking for Groups and Channels.
 *
 * Tracks member roles and mute status per context (group or channel ID).
 * Uses the DEFAULT_ROLE_PERMISSIONS map from brightchain-lib to resolve
 * whether a given role grants a specific permission.
 *
 * Requirements: 7.1, 7.2, 7.3, 7.4
 */
import { DefaultRole, Permission } from '../../enumerations/communication';
export declare class PermissionService {
    /** memberId:contextId → DefaultRole */
    private readonly roles;
    /** memberId:contextId → mute expiry timestamp (ms since epoch) */
    private readonly mutes;
    /**
     * Check whether a member has a specific permission in a context.
     * Returns false if the member has no role in the context or is missing the permission.
     *
     * Requirement 7.1: check member permissions against role-based permission sets.
     */
    hasPermission(memberId: string, contextId: string, permission: Permission): boolean;
    /**
     * Assign (or update) a role for a member in a context.
     *
     * Requirement 7.2: assign and retrieve member roles per context.
     */
    assignRole(memberId: string, contextId: string, role: DefaultRole): void;
    /**
     * Get the role assigned to a member in a context, or null if none.
     */
    getMemberRole(memberId: string, contextId: string): DefaultRole | null;
    /**
     * Check whether a member is currently muted in a context.
     * A mute is active when the stored expiry timestamp is in the future.
     *
     * Requirement 7.3, 7.4: track mute status with expiration, auto-clear on check.
     */
    isMuted(memberId: string, contextId: string): boolean;
    /**
     * Mute a member in a context for the given duration (milliseconds).
     *
     * Requirement 7.3: track member mute status with expiration.
     */
    muteMember(memberId: string, contextId: string, durationMs: number): void;
}
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