AmericanExpress\HyperledgerFabricClient\Transaction\TransactionIdentifierGenerator

Complexity

Total Complexity

3

Size/Duplication

Total Lines	55
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	fromSerializedIdentity()	0	15	1
A	__construct()	0	8	2

<?php

/**
 * Copyright 2017 American Express Travel Related Services Company, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

declare(strict_types=1);

namespace AmericanExpress\HyperledgerFabricClient\Transaction;

use AmericanExpress\HyperledgerFabricClient\Nonce\NonceGeneratorInterface;
use AmericanExpress\HyperledgerFabricClient\Serializer\AsciiCharStringSerializer;
use AmericanExpress\HyperledgerFabricClient\HashAlgorithm;
use AmericanExpress\HyperledgerFabricClient\Serializer\SignedCharStringSerializer;
use Hyperledger\Fabric\Protos\MSP\SerializedIdentity;

final class TransactionIdentifierGenerator implements TransactionIdentifierGeneratorInterface
{
    /**
     * @var NonceGeneratorInterface
     */
    private $nonceGenerator;

    /**
     * @var HashAlgorithm
     */
    private $hashAlgorithm;

    /**
     * @var AsciiCharStringSerializer
     */
    private $asciiCharStringSerializer;

    /**
     * @var SignedCharStringSerializer
     */
    private $signedCharStringSerializer;

    /**
     * @param NonceGeneratorInterface $nonceGenerator
     * @param HashAlgorithm $hashAlgorithm
     */
    public function __construct(
        NonceGeneratorInterface $nonceGenerator,
        HashAlgorithm $hashAlgorithm = null
    ) {
        $this->nonceGenerator = $nonceGenerator;
        $this->hashAlgorithm = $hashAlgorithm ?: new HashAlgorithm();
        $this->asciiCharStringSerializer = new AsciiCharStringSerializer();
        $this->signedCharStringSerializer = new SignedCharStringSerializer();
    }

    /**
     * @param SerializedIdentity $serializedIdentity
     * @return TransactionIdentifier
     */
    public function fromSerializedIdentity(SerializedIdentity $serializedIdentity): TransactionIdentifier
    {
        $nonce = $this->nonceGenerator->generateNonce();

        $noArray = $this->signedCharStringSerializer->deserialize($nonce);

        $identityArray = $this->signedCharStringSerializer->deserialize($serializedIdentity->serializeToString());

        $comp = \array_merge($noArray, $identityArray);

        $compString = $this->asciiCharStringSerializer->serialize($comp);

        return new TransactionIdentifier(
            \hash((string) $this->hashAlgorithm, $compString),
            $nonce
        );
    }
}