/**
 * Copyright 2025 The Lotusia Stewardship
 * Github: https://github.com/LotusiaStewardship
 * License: MIT
 */
import { Buffer } from 'buffer/';
/**
 * Check provided script for OP_RETURN op code
 * @param script - The script to check, as a `Buffer` or hex `string`
 * @returns true if the output is an OP_RETURN, false otherwise
 */
export declare function isOpReturn(script: Buffer | string): boolean;
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