import { NetworkRpcConfig } from '../utils/solana';
export interface X402FacilitatorConfig {
    /** Network-specific RPC URLs (optional, falls back to env vars or public endpoints) */
    rpcConfig?: NetworkRpcConfig;
    /** Default USDC mint address */
    usdcMint?: string;
}
export declare class X402FacilitatorServer {
    private connections;
    private agentWallet?;
    private usdcMint;
    private defaultNetworkId;
    private rpcConfig;
    private seenNonces;
    private logger;
    constructor(config?: X402FacilitatorConfig);
    /**
     * Get or create a connection for a specific network
     * Connections are cached for reuse
     */
    private getConnection;
    /**
     * Get the default connection (for backward compatibility)
     */
    private get connection();
    /**
     * Get networkId (for backward compatibility)
     */
    private get networkId();
    verify(paymentHeader: string, paymentRequirements: any): Promise<any>;
    private validatePaymentLocally;
    settle(paymentHeader: string, paymentRequirements: any): Promise<any>;
    private executeUSDCTransfer;
    private validateMintDecimals;
    private cleanupNonces;
    private validateSignedTransaction;
    private readU64;
    private sendTransactionWithRetry;
    /**
     * Get supported payment schemes
     * Returns all networks that can be handled (devnet and mainnet-beta)
     */
    getSupportedSchemes(): {
        kinds: Array<{
            scheme: string;
            network: string;
        }>;
    };
}
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