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tas-indraniltas-indranil
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Issure resolved. Writing data into file properly
1 parent 05a7518 commit 6643a19

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5 files changed

+189
-6
lines changed

5 files changed

+189
-6
lines changed

‎.gitignore

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,2 +1,3 @@
11
.idea
2-
test.txt
2+
test.txt
3+
test.php

‎Blockchain/Backend/core/Blockchain.php

Lines changed: 15 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
11
<?php
22
require_once 'Blockchain/Backend/core/Block.php'; // Assuming the block.php file path
33
require_once 'Blockchain/Backend/core/BlockHeader.php'; // Assuming the blockheader.php file path
4+
require_once 'Blockchain/Backend/core/database/BaseDB.php'; // Assuming the blockheader.php file path
45
require_once 'Blockchain/Backend/util/util.php'; // Assuming the util.php file path
56

67
$ZERO_HASH = str_repeat('0', 64);
@@ -13,6 +14,16 @@ public function __construct() {
1314
$this->GenesisBlock();
1415
}
1516

17+
public function writeOnDisk($block) {
18+
$blockchainDB = new BlockchainDB();
19+
$blockchainDB->write($block);
20+
}
21+
22+
public function fetchLastBlock() {
23+
$blockchainDB = new BlockchainDB();
24+
return $blockchainDB->lastBlock();
25+
}
26+
1627
private function GenesisBlock() {
1728
$BlockHeight = 0;
1829
$prevBlockHash = $GLOBALS['ZERO_HASH'];
@@ -27,15 +38,14 @@ public function addBlock($BlockHeight, $prevBlockHash) {
2738
$blockheader = new BlockHeader($GLOBALS['VERSION'], $prevBlockHash, $merkleRoot, $timestamp, $bits);
2839
$blockheader->mine();
2940
$block = new Block($BlockHeight, 1, (array)$blockheader, 1, $Transaction);
30-
$this->chain[] = (array)$block;
31-
print_r(json_encode($this->chain, JSON_PRETTY_PRINT));
41+
$this->writeOnDisk((array)$block);
3242
}
3343

3444
public function main() {
3545
while (true) {
36-
$lastBlock = array_reverse($this->chain);
37-
$BlockHeight = $lastBlock[0]['Height'] + 1;
38-
$prevBlockHash = $lastBlock[0]['BlockHeader']['blockHash'];
46+
$lastBlock = $this->fetchLastBlock();
47+
$BlockHeight = $lastBlock['Height'] + 1;
48+
$prevBlockHash = $lastBlock['BlockHeader']['blockHash'];
3949
$this->addBlock($BlockHeight, $prevBlockHash);
4050
}
4151
}

‎Blockchain/Backend/core/database/BaseDB.php

Lines changed: 51 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,51 @@
1+
<?php
2+
class BaseDB {
3+
private string $basepath = 'D:\\xampp\\htdocs\\sand_box\\get_job\\custom-php-blockchain\\Blockchain\\data\\';
4+
private string $filepath;
5+
6+
public function __construct($filename) {
7+
$this->filepath = $this->basepath . DIRECTORY_SEPARATOR . $filename;
8+
}
9+
10+
public function read() {
11+
if (!file_exists($this->filepath)) {
12+
echo "File named {$this->filepath} does not exist." . PHP_EOL;
13+
return false;
14+
}
15+
16+
$raw = file_get_contents($this->filepath);
17+
18+
if (strlen($raw) > 0) {
19+
$data = json_decode($raw, true);
20+
} else {
21+
$data = [];
22+
}
23+
24+
return $data;
25+
}
26+
27+
public function write($item) {
28+
$data = $this->read();
29+
if ($data) {
30+
$data[] = $item;
31+
} else {
32+
$data = [$item];
33+
}
34+
35+
file_put_contents($this->filepath, json_encode($data, JSON_PRETTY_PRINT));
36+
}
37+
}
38+
39+
class BlockchainDB extends BaseDB {
40+
public function __construct() {
41+
parent::__construct('blockchain');
42+
}
43+
44+
public function lastBlock() {
45+
$data = $this->read();
46+
47+
if ($data) {
48+
return end($data);
49+
}
50+
}
51+
}

‎Blockchain/data/blockchain

Lines changed: 107 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,107 @@
1+
[
2+
{
3+
"Height": 0,
4+
"Blocksize": 1,
5+
"BlockHeader": {
6+
"bits": "ffff001f",
7+
"timestamp": 1692918870,
8+
"merkleRoot": "01d3c8ffac385f49854b12bc69248645efddb80a0435dd09631643bdc605d1d1",
9+
"prevBlockHash": "0000000000000000000000000000000000000000000000000000000000000000",
10+
"version": 1,
11+
"nonce": 57706,
12+
"blockHash": "0000d0f7be9722a4d33a1147995f54e00dd09304c3de35b86abf3c73d493f269"
13+
},
14+
"TxCount": 1,
15+
"Txs": "Code Architect sent 0 Bitcoins to Indranil"
16+
},
17+
{
18+
"Height": 1,
19+
"Blocksize": 1,
20+
"BlockHeader": {
21+
"bits": "ffff001f",
22+
"timestamp": 1692918885,
23+
"merkleRoot": "ede8645e1159205c35365fc6b765fbea7acab3d30d83f2094e87b1dc2829b69b",
24+
"prevBlockHash": "0000d0f7be9722a4d33a1147995f54e00dd09304c3de35b86abf3c73d493f269",
25+
"version": 1,
26+
"nonce": 30400,
27+
"blockHash": "0000145cbce04e57681a3492198f05ca5f68f730d2a49ced6f62a22e1e0fb89e"
28+
},
29+
"TxCount": 1,
30+
"Txs": "Code Architect sent 1 Bitcoins to Indranil"
31+
},
32+
{
33+
"Height": 2,
34+
"Blocksize": 1,
35+
"BlockHeader": {
36+
"bits": "ffff001f",
37+
"timestamp": 1692918893,
38+
"merkleRoot": "ee3d44bff24ade0bd29fbf90bcfa1a8a2ef2c991a92bf92e8e8d7bf85cf75e30",
39+
"prevBlockHash": "0000145cbce04e57681a3492198f05ca5f68f730d2a49ced6f62a22e1e0fb89e",
40+
"version": 1,
41+
"nonce": 57819,
42+
"blockHash": "0000b8ef9e602a62196ef75a05dc898ac1e599b4cfe69fd23fcef020ffe70e82"
43+
},
44+
"TxCount": 1,
45+
"Txs": "Code Architect sent 2 Bitcoins to Indranil"
46+
},
47+
{
48+
"Height": 3,
49+
"Blocksize": 1,
50+
"BlockHeader": {
51+
"bits": "ffff001f",
52+
"timestamp": 1692918912,
53+
"merkleRoot": "d0249e654794fa76a823925895732057dc5c51075131f4784a65d31f93754113",
54+
"prevBlockHash": "0000b8ef9e602a62196ef75a05dc898ac1e599b4cfe69fd23fcef020ffe70e82",
55+
"version": 1,
56+
"nonce": 91549,
57+
"blockHash": "000046cfcf21c1ef5ae5abdc09ee2f5d2a95dc4b19dea21e312b1ce3f8cc2718"
58+
},
59+
"TxCount": 1,
60+
"Txs": "Code Architect sent 3 Bitcoins to Indranil"
61+
},
62+
{
63+
"Height": 4,
64+
"Blocksize": 1,
65+
"BlockHeader": {
66+
"bits": "ffff001f",
67+
"timestamp": 1692918942,
68+
"merkleRoot": "3bf90cb05ba2fb3325fec0def457cd7cc6126b204c8963d4939350b2add27c6d",
69+
"prevBlockHash": "000046cfcf21c1ef5ae5abdc09ee2f5d2a95dc4b19dea21e312b1ce3f8cc2718",
70+
"version": 1,
71+
"nonce": 88482,
72+
"blockHash": "00008541d660a151dc1d3d4ca81c5dd844c0c37b07e643322192eace6b5e50b7"
73+
},
74+
"TxCount": 1,
75+
"Txs": "Code Architect sent 4 Bitcoins to Indranil"
76+
},
77+
{
78+
"Height": 5,
79+
"Blocksize": 1,
80+
"BlockHeader": {
81+
"bits": "ffff001f",
82+
"timestamp": 1692918975,
83+
"merkleRoot": "5957ff49fe734ffde6fb685fd313afff54a59671e98acab4f5c84fa8ded0b177",
84+
"prevBlockHash": "00008541d660a151dc1d3d4ca81c5dd844c0c37b07e643322192eace6b5e50b7",
85+
"version": 1,
86+
"nonce": 8339,
87+
"blockHash": "00005c7fd514f61cd3173a7cbd5fa54a0eb90b0ba28e9c442bc0a666fdb1dc71"
88+
},
89+
"TxCount": 1,
90+
"Txs": "Code Architect sent 5 Bitcoins to Indranil"
91+
},
92+
{
93+
"Height": 6,
94+
"Blocksize": 1,
95+
"BlockHeader": {
96+
"bits": "ffff001f",
97+
"timestamp": 1692918978,
98+
"merkleRoot": "fc73585acb5dfb029ad461c0a2caa7259d33e3e9c613eec7ea9926a7fdceb92c",
99+
"prevBlockHash": "00005c7fd514f61cd3173a7cbd5fa54a0eb90b0ba28e9c442bc0a666fdb1dc71",
100+
"version": 1,
101+
"nonce": 268283,
102+
"blockHash": "0000210da7a197c7734b55f27751ecfdc7bb3f881bf49f230d5866625fd3dd54"
103+
},
104+
"TxCount": 1,
105+
"Txs": "Code Architect sent 6 Bitcoins to Indranil"
106+
}
107+
]

‎test.php

Lines changed: 14 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
1+
<?php
2+
require_once 'Blockchain/Backend/core/database/BaseDB.php';
3+
4+
$blockchainDB = new BlockchainDB();
5+
$lastBlock = $blockchainDB->lastBlock();
6+
if ($lastBlock) {
7+
print_r($lastBlock);
8+
} else {
9+
echo "Blockchain is empty.\n";
10+
}
11+
echo "\n";
12+
print_r(__DIR__);
13+
echo "\n";
14+
print_r(__FILE__);

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