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Commit 05a7518

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created base structure of the blockchain with directory structure
0 parents commit 05a7518

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5 files changed

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5 files changed

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‎.gitignore‎

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.idea
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test.txt

‎Blockchain/Backend/core/Block.php‎

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<?php
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class Block {
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/**
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* Block is a storage container that stores transactions
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*/
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public function __construct($Height, $blockSize, $blockHeader, $TxCount, $Txs) {
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$this->Height = $Height;
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$this->Blocksize = $blockSize;
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$this->BlockHeader = $blockHeader;
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$this->TxCount = $TxCount;
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$this->Txs = $Txs;
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}
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}
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<?php
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require_once 'Blockchain/Backend/util/util.php';
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class BlockHeader {
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public function __construct($version, $prevBlockHash, $merkleRoot, $timestamp, $bits) {
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$this->bits = $bits;
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$this->timestamp = $timestamp;
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$this->merkleRoot = $merkleRoot;
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$this->prevBlockHash = $prevBlockHash;
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$this->version = $version;
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$this->nonce = 0;
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$this->blockHash = '';
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}
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public function mine() {
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while (substr($this->blockHash, 0, 4) !== '0000') {
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$inputString = $this->version . $this->prevBlockHash . $this->merkleRoot . $this->timestamp . $this->bits . $this->nonce;
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$inputString = hash256($inputString);
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$this->blockHash = bin2hex($inputString); // convert to hexadecimal
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$this->nonce++;
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echo "Mining started {$this->nonce}\r";
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}
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echo PHP_EOL; // Add a newline after mining is complete
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}
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}
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<?php
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require_once 'Blockchain/Backend/core/Block.php'; // Assuming the block.php file path
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require_once 'Blockchain/Backend/core/BlockHeader.php'; // Assuming the blockheader.php file path
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require_once 'Blockchain/Backend/util/util.php'; // Assuming the util.php file path
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$ZERO_HASH = str_repeat('0', 64);
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$VERSION = 1;
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class Blockchain {
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private $chain = [];
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public function __construct() {
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$this->GenesisBlock();
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}
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private function GenesisBlock() {
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$BlockHeight = 0;
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$prevBlockHash = $GLOBALS['ZERO_HASH'];
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$this->addBlock($BlockHeight, $prevBlockHash);
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}
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public function addBlock($BlockHeight, $prevBlockHash) {
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$timestamp = time();
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$Transaction = "Code Architect sent {$BlockHeight} Bitcoins to Indranil";
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$merkleRoot = bin2hex(hash256($Transaction));
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$bits = 'ffff001f';
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$blockheader = new BlockHeader($GLOBALS['VERSION'], $prevBlockHash, $merkleRoot, $timestamp, $bits);
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$blockheader->mine();
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$block = new Block($BlockHeight, 1, (array)$blockheader, 1, $Transaction);
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$this->chain[] = (array)$block;
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print_r(json_encode($this->chain, JSON_PRETTY_PRINT));
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}
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public function main() {
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while (true) {
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$lastBlock = array_reverse($this->chain);
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$BlockHeight = $lastBlock[0]['Height'] + 1;
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$prevBlockHash = $lastBlock[0]['BlockHeader']['blockHash'];
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$this->addBlock($BlockHeight, $prevBlockHash);
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}
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}
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}
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$blockchain = new Blockchain();
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$blockchain->main();
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‎Blockchain/Backend/util/util.php‎

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<?php
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function hash256($s) {
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// Two rounds of SHA256
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return hash('sha256', hash('sha256', $s, true), true);
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}

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