merging branch 1

.gitignore

@@ -1,3 +1,4 @@
 .idea
 test.txt
 test.php
+

Blockchain/Backend/core/Blockchain.php

@@ -1,6 +1,7 @@
 <?php
 require_once 'Blockchain/Backend/core/Block.php'; // Assuming the block.php file path
 require_once 'Blockchain/Backend/core/BlockHeader.php'; // Assuming the blockheader.php file path
+require_once 'Blockchain/Backend/core/database/BaseDB.php'; // Assuming the blockheader.php file path
 require_once 'Blockchain/Backend/util/util.php'; // Assuming the util.php file path
 
 $ZERO_HASH = str_repeat('0', 64);
@@ -13,6 +14,16 @@ public function __construct() {
         $this->GenesisBlock();
     }
 
+    public function writeOnDisk($block) {
+        $blockchainDB = new BlockchainDB();
+        $blockchainDB->write($block);
+    }
+
+    public function fetchLastBlock() {
+        $blockchainDB = new BlockchainDB();
+        return $blockchainDB->lastBlock();
+    }
+
     private function GenesisBlock() {
         $BlockHeight = 0;
         $prevBlockHash = $GLOBALS['ZERO_HASH'];
@@ -27,15 +38,14 @@ public function addBlock($BlockHeight, $prevBlockHash) {
         $blockheader = new BlockHeader($GLOBALS['VERSION'], $prevBlockHash, $merkleRoot, $timestamp, $bits);
         $blockheader->mine();
         $block = new Block($BlockHeight, 1, (array)$blockheader, 1, $Transaction);
-        $this->chain[] = (array)$block;
-        print_r(json_encode($this->chain, JSON_PRETTY_PRINT));
+        $this->writeOnDisk((array)$block);
     }
 
     public function main() {
         while (true) {
-            $lastBlock = array_reverse($this->chain);
-            $BlockHeight = $lastBlock[0]['Height'] + 1;
-            $prevBlockHash = $lastBlock[0]['BlockHeader']['blockHash'];
+            $lastBlock = $this->fetchLastBlock();
+            $BlockHeight = $lastBlock['Height'] + 1;
+            $prevBlockHash = $lastBlock['BlockHeader']['blockHash'];
             $this->addBlock($BlockHeight, $prevBlockHash);
         }
     }

Blockchain/Backend/core/database/BaseDB.php

@@ -0,0 +1,51 @@
+<?php
+class BaseDB {
+    private string $basepath = 'D:\\xampp\\htdocs\\sand_box\\get_job\\custom-php-blockchain\\Blockchain\\data\\';
+    private string $filepath;
+
+    public function __construct($filename) {
+        $this->filepath = $this->basepath . DIRECTORY_SEPARATOR . $filename;
+    }
+
+    public function read() {
+        if (!file_exists($this->filepath)) {
+            echo "File named {$this->filepath} does not exist." . PHP_EOL;
+            return false;
+        }
+
+        $raw = file_get_contents($this->filepath);
+
+        if (strlen($raw) > 0) {
+            $data = json_decode($raw, true);
+        } else {
+            $data = [];
+        }
+
+        return $data;
+    }
+
+    public function write($item) {
+        $data = $this->read();
+        if ($data) {
+            $data[] = $item;
+        } else {
+            $data = [$item];
+        }
+
+        file_put_contents($this->filepath, json_encode($data, JSON_PRETTY_PRINT));
+    }
+}
+
+class BlockchainDB extends BaseDB {
+    public function __construct() {
+        parent::__construct('blockchain');
+    }
+
+    public function lastBlock() {
+        $data = $this->read();
+
+        if ($data) {
+            return end($data);
+        }
+    }
+}

Blockchain/data/blockchain

@@ -0,0 +1,107 @@
+[
+    {
+        "Height": 0,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918870,
+            "merkleRoot": "01d3c8ffac385f49854b12bc69248645efddb80a0435dd09631643bdc605d1d1",
+            "prevBlockHash": "0000000000000000000000000000000000000000000000000000000000000000",
+            "version": 1,
+            "nonce": 57706,
+            "blockHash": "0000d0f7be9722a4d33a1147995f54e00dd09304c3de35b86abf3c73d493f269"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 0 Bitcoins to Indranil"
+    },
+    {
+        "Height": 1,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918885,
+            "merkleRoot": "ede8645e1159205c35365fc6b765fbea7acab3d30d83f2094e87b1dc2829b69b",
+            "prevBlockHash": "0000d0f7be9722a4d33a1147995f54e00dd09304c3de35b86abf3c73d493f269",
+            "version": 1,
+            "nonce": 30400,
+            "blockHash": "0000145cbce04e57681a3492198f05ca5f68f730d2a49ced6f62a22e1e0fb89e"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 1 Bitcoins to Indranil"
+    },
+    {
+        "Height": 2,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918893,
+            "merkleRoot": "ee3d44bff24ade0bd29fbf90bcfa1a8a2ef2c991a92bf92e8e8d7bf85cf75e30",
+            "prevBlockHash": "0000145cbce04e57681a3492198f05ca5f68f730d2a49ced6f62a22e1e0fb89e",
+            "version": 1,
+            "nonce": 57819,
+            "blockHash": "0000b8ef9e602a62196ef75a05dc898ac1e599b4cfe69fd23fcef020ffe70e82"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 2 Bitcoins to Indranil"
+    },
+    {
+        "Height": 3,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918912,
+            "merkleRoot": "d0249e654794fa76a823925895732057dc5c51075131f4784a65d31f93754113",
+            "prevBlockHash": "0000b8ef9e602a62196ef75a05dc898ac1e599b4cfe69fd23fcef020ffe70e82",
+            "version": 1,
+            "nonce": 91549,
+            "blockHash": "000046cfcf21c1ef5ae5abdc09ee2f5d2a95dc4b19dea21e312b1ce3f8cc2718"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 3 Bitcoins to Indranil"
+    },
+    {
+        "Height": 4,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918942,
+            "merkleRoot": "3bf90cb05ba2fb3325fec0def457cd7cc6126b204c8963d4939350b2add27c6d",
+            "prevBlockHash": "000046cfcf21c1ef5ae5abdc09ee2f5d2a95dc4b19dea21e312b1ce3f8cc2718",
+            "version": 1,
+            "nonce": 88482,
+            "blockHash": "00008541d660a151dc1d3d4ca81c5dd844c0c37b07e643322192eace6b5e50b7"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 4 Bitcoins to Indranil"
+    },
+    {
+        "Height": 5,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918975,
+            "merkleRoot": "5957ff49fe734ffde6fb685fd313afff54a59671e98acab4f5c84fa8ded0b177",
+            "prevBlockHash": "00008541d660a151dc1d3d4ca81c5dd844c0c37b07e643322192eace6b5e50b7",
+            "version": 1,
+            "nonce": 8339,
+            "blockHash": "00005c7fd514f61cd3173a7cbd5fa54a0eb90b0ba28e9c442bc0a666fdb1dc71"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 5 Bitcoins to Indranil"
+    },
+    {
+        "Height": 6,
+        "Blocksize": 1,
+        "BlockHeader": {
+            "bits": "ffff001f",
+            "timestamp": 1692918978,
+            "merkleRoot": "fc73585acb5dfb029ad461c0a2caa7259d33e3e9c613eec7ea9926a7fdceb92c",
+            "prevBlockHash": "00005c7fd514f61cd3173a7cbd5fa54a0eb90b0ba28e9c442bc0a666fdb1dc71",
+            "version": 1,
+            "nonce": 268283,
+            "blockHash": "0000210da7a197c7734b55f27751ecfdc7bb3f881bf49f230d5866625fd3dd54"
+        },
+        "TxCount": 1,
+        "Txs": "Code Architect sent 6 Bitcoins to Indranil"
+    }
+]

README.md

@@ -0,0 +1,2 @@
+# Blockchain with php
+A personal project

test.php

@@ -0,0 +1,14 @@
+<?php
+require_once 'Blockchain/Backend/core/database/BaseDB.php';
+
+$blockchainDB = new BlockchainDB();
+$lastBlock = $blockchainDB->lastBlock();
+if ($lastBlock) {
+    print_r($lastBlock);
+} else {
+    echo "Blockchain is empty.\n";
+}
+echo "\n";
+print_r(__DIR__);
+echo "\n";
+print_r(__FILE__);