/**
 * Check if a byte array has the PSBT magic bytes
 *
 * PSBTs start with the magic bytes "psbt" (0x70 0x73 0x62 0x74) followed by a separator 0xff.
 * This method checks if the given bytes start with these 5 magic bytes.
 *
 * @param bytes - The byte array to check
 * @returns true if the bytes start with PSBT magic, false otherwise
 *
 * @example
 * ```typescript
 * import { hasPsbtMagic } from "@bitgo/wasm-utxo";
 *
 * if (hasPsbtMagic(data)) {
 *   const psbt = BitGoPsbt.fromBytes(data, network);
 * }
 * ```
 */
export declare function hasPsbtMagic(bytes: Uint8Array): boolean;
