File: src/Structure/BlockChain.php

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File: src/Structure/BlockChain.php
Role: Unit test script
Content type: text/plain
Description: Unit test script
Class: Halite
Perform cryptography operations with libsodium
Author: By
Last change:
Date: 5 years ago
Size: 1,115 bytes
 

 

Contents

Class file image Download
<?php
declare(strict_types=1);
namespace
ParagonIE\Halite\Structure;

class
BlockChain
{
    private
$startHash;
    private
$trees;
    private
$lastHash;
   
   
/**
     * A block chain data structure
     *
     * @param string $startHash The hash from which we begin loading trees
     * @param MerkleTree $trees
     */
   
public function __construct(string $startHash = '', MerkleTree ...$trees)
    {
       
$this->startHash = $startHash;
       
$this->trees = $trees;
       
$this->lastHash = $this->calculateHash();
    }

    public function
getHash(bool $raw = false): string
   
{
        if (
$raw) {
            return
$this->lastHash;
        }
        return \
Sodium\bin2hex($this->lastHash);
    }

   
/**
     *
     * @return string
     */
   
protected function calculateHash(): string
   
{
       
$numTrees = \count($this->trees);
       
$hash = $this->startHash;
        for (
$i = 0; $i < $numTrees; ++$i) {
           
$hash = \Sodium\crypto_generichash(
               
$this->trees[$i]->getRoot(true),
               
$hash
           
);
        }
        return
$hash;
    }
}


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