/**
 * Hosted x402 proxy verification helpers.
 *
 * These helpers let a buyer validate a hosted paid-MCP proxy challenge before
 * any wallet signs. They check the machine-readable 402 payment requirement
 * and the local buyer controls that sit outside the remote proxy: approval,
 * spend cap, audit logging, and pooled-token lock-in acceptance.
 */
type HeaderGetter = {
    get(_name: string): string | null | undefined;
};
type HeaderSource = Record<string, string | undefined> | Array<[string, string]> | HeaderGetter;
export type HostedProxyVerificationInput = {
    status: number;
    headers?: HeaderSource;
    body?: string;
    allowedNetworks: string[];
    allowedAssets: string[];
    maxAmountRequired?: string | bigint;
    approvalGate: {
        required: boolean;
        state: 'approved' | 'pending' | 'declined' | 'not_configured';
    };
    auditLog: {
        required: boolean;
        destination?: string;
        correlationId?: string;
    };
    upstreamCredentialMode: 'buyer-owned' | 'operator-pooled' | 'unknown';
    pooledTokenLockInAccepted?: boolean;
};
export type HostedProxyVerifiedOffer = {
    scheme?: string;
    network: string;
    asset: string;
    amountRequired: string;
    payTo: string;
};
export type HostedProxyVerificationResult = {
    ok: boolean;
    failures: string[];
    warnings: string[];
    source: 'payment-required-header' | 'x-payment-required-header' | 'body' | 'none';
    offers: HostedProxyVerifiedOffer[];
};
export declare function verifyHostedProxyPaymentRequirement(input: HostedProxyVerificationInput): HostedProxyVerificationResult;
export {};
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