/**
 * Get request signature
 * @param t Timestamp
 * @returns Request signature
 */
export declare function getAppSignature(t: number): string;
/**
 * Get signature for reward token request
 * @param t Timestamp
 * @param userId User ID
 * @param v App version (build number)
 * @returns Signature
 */
export declare function getRewardTokenSignature(t: number, userId: number, v: number): string;
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