UmiTop\UmiCore\Util\ConverterTrait

Complexity

Total Complexity

15

Size/Duplication

Total Lines	121
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

9 Methods

Rating	Name	Duplication	Size	Complexity
A	prefixToBytes()	0	3	1
A	versionToPrefix()	0	13	2
A	bytesToPrefix()	0	3	1
A	prefixToVersion()	0	17	3
A	int64ToBytes()	0	5	1
A	checkPrefixChars()	0	5	4
A	uint16ToBytes()	0	3	1
A	bytesToInt64()	0	4	1
A	bytesToUint16()	0	3	1

<?php

/**
 * Copyright (c) 2020 UMI
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

declare(strict_types=1);

namespace UmiTop\UmiCore\Util;

use Exception;

/**
 * Trait ConverterTrait
 * @package UmiTop\UmiCore\Util
 */
trait ConverterTrait
{
    /**
     * Преобразует версию адреса в префикс.
     * @param int $version Версия адреса.
     * @return string
     * @throws Exception
     */
    private function versionToPrefix(int $version): string
    {
        if ($version === 0) {
            return 'genesis';
        }

        $ch1 = $version >> 10 & 0x1F;
        $ch2 = $version >> 5 & 0x1F;
        $ch3 = $version & 0x1F;

        $this->checkPrefixChars([$ch1, $ch2, $ch3]);

        return chr($ch1 + 96) . chr($ch2 + 96) . chr($ch3 + 96);
    }

    /**
     * Преобразует бинарное представление версии в префикс.
     * @param string $bytes Версия в бинарном виде, длина 2 байта.
     * @return string
     * @throws Exception
     */
    private function bytesToPrefix(string $bytes): string
    {
        return $this->versionToPrefix($this->bytesToUint16($bytes));
    }

    /**
     * Преобразует префикс в версию.
     * @param string $prefix Префикс адреса, три символа.
     * @return int
     * @throws Exception
     */
    private function prefixToVersion(string $prefix): int
    {
        if ($prefix === 'genesis') {
            return 0;
        }

        if (strlen($prefix) !== 3) {
            throw new Exception('bech32: invalid prefix length');
        }

        $ch1 = ord($prefix[0]) - 96;
        $ch2 = ord($prefix[1]) - 96;
        $ch3 = ord($prefix[2]) - 96;

        $this->checkPrefixChars([$ch1, $ch2, $ch3]);

        return ($ch1 << 10) + ($ch2 << 5) + $ch3;
    }

    /**
     * Преобразует префикс в бинарное представление.
     * @param string $prefix Префикс адреса, три символа.
     * @return string
     * @throws Exception
     */
    private function prefixToBytes(string $prefix): string
    {
        return $this->uint16ToBytes($this->prefixToVersion($prefix));
    }

    /**
     * @param array<int, int> $chars
     * @return void
     * @throws Exception
     */
    private function checkPrefixChars(array $chars): void
    {
        foreach ($chars as $chr) {
            if ($chr < 1 || $chr > 26) {
                throw new Exception('bech32: invalid prefix character');
            }
        }
    }

    /**
     * @param int $value
     * @return string
     */
    private function uint16ToBytes(int $value): string
    {
        return (chr($value >> 8 & 0xff) . chr($value & 0xff));
    }

    /**
     * @param string $bytes
     * @return int
     */
    private function bytesToUint16(string $bytes): int
    {
        return ((ord($bytes[0]) << 8) + ord($bytes[1]));
    }

    /**
     * @param int $value
     * @return string
     */
    private function int64ToBytes(int $value): string
    {
        return chr($value >> 56 & 0xff) . chr($value >> 48 & 0xff) . chr($value >> 40 & 0xff)
            . chr($value >> 32 & 0xff) . chr($value >> 24 & 0xff) . chr($value >> 16 & 0xff)
            . chr($value >> 8 & 0xff) . chr($value & 0xff);
    }

    /**
     * @param string $bytes
     * @return int
     */
    private function bytesToInt64(string $bytes): int
    {
        return (ord($bytes[0]) << 56) | (ord($bytes[1]) << 48) | (ord($bytes[2]) << 40) | (ord($bytes[3]) << 32)
            | (ord($bytes[4]) << 24) | (ord($bytes[5]) << 16) | (ord($bytes[6]) << 8) | (ord($bytes[7]));
    }
}