import type { SolanaIntent, IntentStatus } from './intent';
/**
 * Verifies the signature of a Solana intent
 * @param intent The intent to verify
 * @returns boolean indicating if the signature is valid
 */
export declare function verifyIntentSignature(intent: SolanaIntent): boolean;
/**
 * Checks if an intent has expired
 * @param intent The intent to check
 * @returns boolean indicating if the intent has expired
 */
export declare function isIntentExpired(intent: SolanaIntent): boolean;
/**
 * Updates the status of an intent
 * @param intent The intent to update
 * @param status The new status
 * @param error Optional error message if status is 'failed'
 * @returns A new intent with updated status
 */
export declare function updateIntentStatus(intent: SolanaIntent, status: IntentStatus, error?: string): SolanaIntent;
/**
 * Validates an intent against current blockchain state
 * Note: This is a placeholder - actual implementation would check against a Solana node
 * @param intent The intent to validate
 * @param currentBlockhash Current network blockhash
 * @returns Validation result with success status and optional error message
 */
export declare function validateIntent(intent: SolanaIntent, currentBlockhash: string): Promise<{
    valid: boolean;
    error?: string;
}>;
/**
 * Processes a batch of intents for synchronization
 * @param intents Array of intents to process
 * @param connection Connection to Solana network
 * @returns Processed intents with updated statuses
 */
export declare function processIntentsForSync(intents: SolanaIntent[], connection: any): Promise<SolanaIntent[]>;
/**
 * Filters out expired intents and updates their status
 * @param intents Array of intents to check
 * @returns Tuple of [validIntents, expiredIntents]
 */
export declare function filterExpiredIntents(intents: SolanaIntent[]): [SolanaIntent[], SolanaIntent[]];
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