const crcTable = [
    0x0000,
    0x1021,
    0x2042,
    0x3063,
    0x4084,
    0x50a5,
    0x60c6,
    0x70e7,
    0x8108,
    0x9129,
    0xa14a,
    0xb16b,
    0xc18c,
    0xd1ad,
    0xe1ce,
    0xf1ef,
    0x1231,
    0x0210,
    0x3273,
    0x2252,
    0x52b5,
    0x4294,
    0x72f7,
    0x62d6,
    0x9339,
    0x8318,
    0xb37b,
    0xa35a,
    0xd3bd,
    0xc39c,
    0xf3ff,
    0xe3de,
    0x2462,
    0x3443,
    0x0420,
    0x1401,
    0x64e6,
    0x74c7,
    0x44a4,
    0x5485,
    0xa56a,
    0xb54b,
    0x8528,
    0x9509,
    0xe5ee,
    0xf5cf,
    0xc5ac,
    0xd58d,
    0x3653,
    0x2672,
    0x1611,
    0x0630,
    0x76d7,
    0x66f6,
    0x5695,
    0x46b4,
    0xb75b,
    0xa77a,
    0x9719,
    0x8738,
    0xf7df,
    0xe7fe,
    0xd79d,
    0xc7bc,
    0x48c4,
    0x58e5,
    0x6886,
    0x78a7,
    0x0840,
    0x1861,
    0x2802,
    0x3823,
    0xc9cc,
    0xd9ed,
    0xe98e,
    0xf9af,
    0x8948,
    0x9969,
    0xa90a,
    0xb92b,
    0x5af5,
    0x4ad4,
    0x7ab7,
    0x6a96,
    0x1a71,
    0x0a50,
    0x3a33,
    0x2a12,
    0xdbfd,
    0xcbdc,
    0xfbbf,
    0xeb9e,
    0x9b79,
    0x8b58,
    0xbb3b,
    0xab1a,
    0x6ca6,
    0x7c87,
    0x4ce4,
    0x5cc5,
    0x2c22,
    0x3c03,
    0x0c60,
    0x1c41,
    0xedae,
    0xfd8f,
    0xcdec,
    0xddcd,
    0xad2a,
    0xbd0b,
    0x8d68,
    0x9d49,
    0x7e97,
    0x6eb6,
    0x5ed5,
    0x4ef4,
    0x3e13,
    0x2e32,
    0x1e51,
    0x0e70,
    0xff9f,
    0xefbe,
    0xdfdd,
    0xcffc,
    0xbf1b,
    0xaf3a,
    0x9f59,
    0x8f78,
    0x9188,
    0x81a9,
    0xb1ca,
    0xa1eb,
    0xd10c,
    0xc12d,
    0xf14e,
    0xe16f,
    0x1080,
    0x00a1,
    0x30c2,
    0x20e3,
    0x5004,
    0x4025,
    0x7046,
    0x6067,
    0x83b9,
    0x9398,
    0xa3fb,
    0xb3da,
    0xc33d,
    0xd31c,
    0xe37f,
    0xf35e,
    0x02b1,
    0x1290,
    0x22f3,
    0x32d2,
    0x4235,
    0x5214,
    0x6277,
    0x7256,
    0xb5ea,
    0xa5cb,
    0x95a8,
    0x8589,
    0xf56e,
    0xe54f,
    0xd52c,
    0xc50d,
    0x34e2,
    0x24c3,
    0x14a0,
    0x0481,
    0x7466,
    0x6447,
    0x5424,
    0x4405,
    0xa7db,
    0xb7fa,
    0x8799,
    0x97b8,
    0xe75f,
    0xf77e,
    0xc71d,
    0xd73c,
    0x26d3,
    0x36f2,
    0x0691,
    0x16b0,
    0x6657,
    0x7676,
    0x4615,
    0x5634,
    0xd94c,
    0xc96d,
    0xf90e,
    0xe92f,
    0x99c8,
    0x89e9,
    0xb98a,
    0xa9ab,
    0x5844,
    0x4865,
    0x7806,
    0x6827,
    0x18c0,
    0x08e1,
    0x3882,
    0x28a3,
    0xcb7d,
    0xdb5c,
    0xeb3f,
    0xfb1e,
    0x8bf9,
    0x9bd8,
    0xabbb,
    0xbb9a,
    0x4a75,
    0x5a54,
    0x6a37,
    0x7a16,
    0x0af1,
    0x1ad0,
    0x2ab3,
    0x3a92,
    0xfd2e,
    0xed0f,
    0xdd6c,
    0xcd4d,
    0xbdaa,
    0xad8b,
    0x9de8,
    0x8dc9,
    0x7c26,
    0x6c07,
    0x5c64,
    0x4c45,
    0x3ca2,
    0x2c83,
    0x1ce0,
    0x0cc1,
    0xef1f,
    0xff3e,
    0xcf5d,
    0xdf7c,
    0xaf9b,
    0xbfba,
    0x8fd9,
    0x9ff8,
    0x6e17,
    0x7e36,
    0x4e55,
    0x5e74,
    0x2e93,
    0x3eb2,
    0x0ed1,
    0x1ef0,
  ];
  
  const computeCRC = (str: string): string => {
    let crc = 0xffff;
    let j, i;
    for (i = 0; i < str.length; i++) {
      const c = str.charCodeAt(i);
      if (c > 255) throw new RangeError();
      j = (c ^ (crc >> 8)) & 0xff;
      crc = crcTable[j] ^ (crc << 8);
    }
    return ((crc ^ 0) & 0xffff).toString(16).toUpperCase();
  };
  export default computeCRC;