/**
 * @name hosted-gateway/receipt-verifier
 * @description On-chain receipt verification for premium session activation.
 *
 * Solking disclosure 2026-09-07 (Finding 2): activation accepted any 8-character
 * receipt string. This module implements the `ReceiptVerifier` contract by
 * resolving the receipt as a Solana transaction signature and requiring it to
 * be FINALIZED on-chain. Amount/payTo binding is enforced at the facilitator
 * settlement layer; this check guarantees the receipt is a real, landed
 * transaction rather than an invented placeholder.
 *
 * @module hosted-gateway/receipt-verifier
 */
/**
 * @name ReceiptVerificationConfig
 * @description RPC endpoint used to resolve receipt signatures.
 */
export interface ReceiptVerificationConfig {
    rpcUrl: string;
    commitment?: 'confirmed' | 'finalized';
}
/**
 * @name createOnChainReceiptVerifier
 * @description Build a ReceiptVerifier that resolves the receipt as a Solana
 * transaction signature and requires it to be confirmed on-chain.
 *
 * Returns `valid: false` with a structured reason when the signature is
 * malformed, not found, or failed on-chain. Never throws for invalid receipts —
 * errors inside the verification flow surface as `receipt_verification_error`
 * at the activation-manager layer.
 *
 * @param config - RPC endpoint configuration.
 * @returns A ReceiptVerifier backed by Solana RPC lookups.
 */
export declare function createOnChainReceiptVerifier(config: ReceiptVerificationConfig): {
    verify(receipt: string, expectedAmountUsd?: number): Promise<{
        valid: boolean;
        payer?: string;
        reason?: string;
    }>;
};
/** Re-exported for unit conversion in amount-binding follow-ups. */
export declare const SOL_LAMPORTS = 1000000000;
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