Method hexToBytes

java/lib/src/main/java/io/github/ccxt/base/Crypto.java:544–553

(String hex)

    }

    private static byte[] hexToBytes(String hex) {
        // return Hex.decode(hex.replaceFirst("^0x", ""));
        int len = hex.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) ((Character.digit(hex.charAt(i), 16) << 4)
                                 + Character.digit(hex.charAt(i+1), 16));
        }
        return data;
    }

    public static String ByteArrayToString(byte[] ba) {
        return binaryToHex(ba).toUpperCase(Locale.ROOT);