/**
 * AP2 (A2A Payment) Protocol
 * Agent-to-Agent Payment Protocol for autonomous transactions
 */
export interface AP2PaymentRequest {
    id: string;
    from: string;
    to: string;
    amount: string;
    currency: string;
    network: string;
    description?: string;
    metadata?: Record<string, any>;
    createdAt: number;
    expiresAt: number;
}
export interface AP2PaymentResponse {
    requestId: string;
    status: 'pending' | 'approved' | 'rejected' | 'completed' | 'failed';
    transactionHash?: string;
    message?: string;
    timestamp: number;
}
export interface AP2PaymentVerification {
    requestId: string;
    transactionHash: string;
    network: string;
    verified: boolean;
    confirmations: number;
    timestamp: number;
}
export declare class AP2Protocol {
    private network;
    private currency;
    constructor(network?: string, currency?: string);
    createPaymentRequest(from: string, to: string, amount: number, description?: string, metadata?: Record<string, any>): AP2PaymentRequest;
    createPaymentResponse(requestId: string, status: AP2PaymentResponse['status'], transactionHash?: string, message?: string): AP2PaymentResponse;
    verifyPayment(requestId: string, transactionHash: string, verified: boolean, confirmations?: number): AP2PaymentVerification;
    isExpired(request: AP2PaymentRequest): boolean;
    validateRequest(request: AP2PaymentRequest): {
        valid: boolean;
        errors: string[];
    };
    encodeRequest(request: AP2PaymentRequest): string;
    decodeRequest(encoded: string): AP2PaymentRequest;
}
export declare class AP2PaymentNegotiation {
    private requests;
    private responses;
    constructor();
    proposePayment(request: AP2PaymentRequest): void;
    respondToPayment(response: AP2PaymentResponse): void;
    getRequest(requestId: string): AP2PaymentRequest | undefined;
    getResponse(requestId: string): AP2PaymentResponse | undefined;
    clearExpiredRequests(): number;
}
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