import type { X402ProofOfPayment } from '../interfaces/x402.js';
/**
 * Result of proof validation
 */
export interface ProofValidationResult {
    /** Whether the proof is valid */
    valid: boolean;
    /** Validation method used */
    method: 'rpc' | 'indexer' | 'skip';
    /** Error message if validation failed */
    error?: string;
    /** Transaction details if found */
    details?: {
        blockTime?: number;
        slot?: number;
        fee?: number;
        status: 'confirmed' | 'finalized' | 'processed' | 'unknown';
    };
}
/**
 * Validation options
 */
export interface ValidationOptions {
    /** Require specific confirmation level (Solana) */
    commitment?: 'processed' | 'confirmed' | 'finalized';
    /** Timeout in milliseconds */
    timeoutMs?: number;
}
/**
 * Validate a proof of payment (FORMAT ONLY)
 *
 * IMPORTANT: This function only validates the proof format (address formats,
 * transaction hash format, etc.). It does NOT verify the transaction on-chain.
 * On-chain verification would require RPC access and is not currently implemented.
 *
 * For production use, consider verifying proofs on-chain via the respective
 * chain's RPC (e.g., getTransaction on Solana, eth_getTransactionReceipt on EVM).
 */
export declare function validateProofFormat(proof: X402ProofOfPayment, _options?: ValidationOptions): Promise<ProofValidationResult>;
/**
 * @deprecated Use validateProofFormat instead. This function only validates format,
 * not on-chain presence of the transaction.
 */
export declare const validateProof: typeof validateProofFormat;
/**
 * Check if a proof looks valid without on-chain validation
 * Fast sanity check for format correctness
 */
export declare function isProofFormatValid(proof: X402ProofOfPayment): {
    valid: boolean;
    errors: string[];
};
/**
 * Detect chain type from proof format
 */
export declare function getChainTypeFromProof(proof: X402ProofOfPayment): 'solana' | 'evm' | 'unknown';
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