/**
 * CoT stream first-byte detection: TAK Protocol (0xBF) or traditional XML (0x3C '<').
 * Used by tests and any code that must distinguish CoT from other protocols.
 */

export const COT_FIRST_BYTE_TAK = 0xBF
export const COT_FIRST_BYTE_XML = 0x3C

/** @param {number} byte - First byte of stream. @returns {boolean} */
export function isCotFirstByte(byte) {
  return byte === COT_FIRST_BYTE_TAK || byte === COT_FIRST_BYTE_XML
}