import { Delegation, DelegationRequest, DelegationResponse, Receipt, StorageConfig } from "@kya-os/contracts/registry";
/**
 * Delegation management for XMCP-I runtime
 */
export interface DelegationManager {
    /**
     * Issue a new delegation
     */
    issue(request: DelegationRequest): Promise<DelegationResponse>;
    /**
     * Revoke an existing delegation
     */
    revoke(delegationRef: string): Promise<Receipt>;
    /**
     * Check if a delegation is active
     */
    isActive(delegationRef: string): Promise<boolean>;
    /**
     * Get delegation details
     */
    get(delegationRef: string): Promise<Delegation | null>;
    /**
     * List active delegations for a subject
     */
    listBySubject(subject: string): Promise<Delegation[]>;
}
/**
 * Default delegation manager implementation
 */
export declare class DefaultDelegationManager implements DelegationManager {
    private config;
    constructor(config?: Partial<StorageConfig>);
    issue(request: DelegationRequest): Promise<DelegationResponse>;
    revoke(_delegationRef: string): Promise<Receipt>;
    isActive(delegationRef: string): Promise<boolean>;
    get(delegationRef: string): Promise<Delegation | null>;
    listBySubject(_subject: string): Promise<Delegation[]>;
    /**
     * Encrypt delegation payload for audience
     */
    private encryptDelegation;
}
/**
 * Create delegation manager instance
 */
export declare function createDelegationManager(config?: Partial<StorageConfig>): DelegationManager;
/**
 * Delegation context for runtime use
 */
export interface DelegationContext {
    delegationRef?: string;
    scopes: string[];
    audience?: string;
    expiresAt: number;
}
/**
 * Extract delegation context from proof metadata
 */
export declare function extractDelegationContext(delegationRef?: string): DelegationContext | null;