/**
 * Performs a single SHA256.
 */
export declare function sha256(hex: string): string;
/**
 * Performs a single RIPEMD160.
 */
export declare function ripemd160(hex: string): string;
/**
 * Performs a SHA256 followed by a RIPEMD160.
 */
export declare function hash160(hex: string): string;
/**
 * Performs 2 SHA256.
 */
export declare function hash256(hex: string): string;
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