import EventEmitter from 'eventemitter3';
/**
 * Blockchain Service - Client-Side Smart Contract Interactions
 *
 * This service enables direct interaction with PMT Gateway smart contracts
 * from the browser, eliminating the need for a backend server.
 */
export interface BlockchainConfig {
    rpcUrl: string;
    escrowContractAddress: string;
    merchantRegistryAddress: string;
    subscriptionContractAddress: string;
    chainId?: number;
}
export interface PaymentEventData {
    paymentId: string;
    buyer: string;
    merchant: string;
    amount: string;
    externalId?: string;
    txHash: string;
}
export declare class BlockchainService extends EventEmitter {
    private provider;
    private escrowContract;
    private merchantRegistryContract;
    private subscriptionContract;
    private config;
    private isMonitoring;
    private static ESCROW_ABI;
    private static MERCHANT_REGISTRY_ABI;
    private static SUBSCRIPTION_ABI;
    constructor(config: BlockchainConfig);
    /**
     * Initialize blockchain connection with browser wallet
     */
    initializeWithWallet(): Promise<void>;
    /**
     * Initialize blockchain connection with RPC provider (read-only)
     */
    initializeWithRPC(): Promise<void>;
    /**
     * Initialize smart contract instances
     */
    private initializeContracts;
    /**
     * Get signer for transactions
     */
    private getSigner;
    /**
     * Create escrow payment on-chain
     */
    createEscrowPayment(merchant: string, amount: string, expirationSeconds: number, externalId: string): Promise<{
        paymentId: string;
        txHash: string;
    }>;
    /**
     * Release escrow payment
     */
    releasePayment(paymentId: string): Promise<string>;
    /**
     * Refund escrow payment
     */
    refundPayment(paymentId: string): Promise<string>;
    /**
     * Dispute escrow payment
     */
    disputePayment(paymentId: string): Promise<string>;
    /**
     * Get payment details from blockchain
     */
    getPayment(paymentId: string): Promise<any>;
    /**
     * Get all payments for a merchant
     */
    getMerchantPayments(merchantAddress: string): Promise<string[]>;
    /**
     * Get all payments for a buyer
     */
    getBuyerPayments(buyerAddress: string): Promise<string[]>;
    /**
     * Register merchant on-chain
     */
    registerMerchant(businessName: string, ipfsHash: string): Promise<string>;
    /**
     * Get merchant details from blockchain
     */
    getMerchant(merchantAddress: string): Promise<any>;
    /**
     * Create subscription on-chain
     */
    createSubscription(merchant: string, amountPerPeriod: string, interval: number, trialPeriod: number, initialPayment: string): Promise<{
        subscriptionId: string;
        txHash: string;
    }>;
    /**
     * Cancel subscription
     */
    cancelSubscription(subscriptionId: string): Promise<string>;
    /**
     * Start monitoring blockchain events
     */
    startEventMonitoring(): Promise<void>;
    /**
     * Stop monitoring blockchain events
     */
    stopEventMonitoring(): void;
    /**
     * Get current network info
     */
    getNetworkInfo(): Promise<{
        chainId: number;
        name: string;
    }>;
    /**
     * Check if connected to correct network
     */
    isCorrectNetwork(): Promise<boolean>;
    /**
     * Disconnect and cleanup
     */
    disconnect(): void;
}
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