implement post commission

README.md

@@ -31,6 +31,7 @@ KevaChat is distributed chat platform for open, uncensored and privacy respectab
 
 ## Install
 
+* `apt install git composer memcached sqlite3 php-curl php-memcached php-sqlite3 php-mbstring`
 * `git clone https://github.com/kevachat/geminiapp.git`
 * `cd geminiapp`
 * `composer update`
@@ -41,6 +42,7 @@ KevaChat is distributed chat platform for open, uncensored and privacy respectab
 * `cp example/config.json host/127.0.0.1/config.json`
 * `cd host/127.0.0.1`
 * `openssl req -x509 -newkey rsa:4096 -keyout key.rsa -out cert.pem -days 365 -nodes -subj "/CN=127.0.0.1"`
+* `* * * * * php src/crontab.php 127.0.0.1` - if post commission enabled
 
 ## Start
 

composer.json

@@ -10,7 +10,7 @@
     },
     "require": {
         "yggverse/titan-ii": "^1.0",
-        "kevachat/kevacoin": "^1.6",
+        "kevachat/kevacoin": "^1.7",
         "clitor-is-protocol/kevacoin": "^1.0",
         "yggverse/cache": "^0.4"
     }

data.sql

@@ -0,0 +1,11 @@
+CREATE TABLE IF NOT EXISTS "pool" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+    "time" INTEGER NOT NULL,
+    "sent" INTEGER NOT NULL,
+    "expired" INTEGER NOT NULL,
+    "cost" INTEGER NOT NULL,
+    "address" VARCHAR NOT NULL,
+    "namespace" VARCHAR NOT NULL,
+    "key" VARCHAR NOT NULL,
+    "value" TEXT NOT NULL
+);

example/config.json

@@ -36,6 +36,16 @@
             "namespace":"geminiapp"
         }
     },
+    "sqlite":
+    {
+        "server":
+        {
+            "name":"127.0.0.1/data.db",
+            "user":"",
+            "password":"",
+            "timeout":600
+        }
+    },
     "kevachat":
     {
         "about":
@@ -62,6 +72,15 @@
             "value":
             {
                 "regex":"/.*/ui"
+            },
+            "pool":
+            {
+                "timeout":3600,
+                "confirmations":1
+            },
+            "cost":
+            {
+                "kva":1
             }
         },
         "user":

src/controller/room.php

@@ -10,6 +10,7 @@ class Room
 
     private \Kevachat\Kevacoin\Client $_kevacoin;
     private \Yggverse\Cache\Memory $_memory;
+    private \PDO $_database;
 
     public function __construct($config)
     {
@@ -40,6 +41,38 @@ class Room
             $this->_config->kevacoin->server->username,
             $this->_config->kevacoin->server->password
         );
+
+        // Init database
+        $this->_database = new \PDO(
+            sprintf(
+                'sqlite:%s/../../host/%s',
+                __DIR__,
+                $config->sqlite->server->name
+            ),
+            $config->sqlite->server->user,
+            $config->sqlite->server->password
+        );
+
+        $this->_database->setAttribute(
+            \PDO::ATTR_ERRMODE,
+            \PDO::ERRMODE_EXCEPTION
+        );
+
+        $this->_database->setAttribute(
+            \PDO::ATTR_DEFAULT_FETCH_MODE,
+            \PDO::FETCH_OBJ
+        );
+
+        $this->_database->setAttribute(
+            \PDO::ATTR_TIMEOUT,
+            $config->sqlite->server->timeout
+        );
+
+        $this->_database->query(
+            file_get_contents(
+                __DIR__ . '/../../data.sql'
+            )
+        );
     }
 
     public function list(): string
@@ -294,7 +327,7 @@ class Room
         );
     }
 
-    public function post(string $namespace, ?string $txid, int $session, string $message): ?string
+    public function post(string $namespace, ?string $mention, int $session, string $message, ?string &$address = null): null|int|string
     {
         // Validate funds available yet
         if (1 > $this->_kevacoin->getBalance())
@@ -322,9 +355,9 @@ class Room
         );
 
         // Append mention if provided
-        if ($txid)
+        if ($mention)
         {
-            $message = '@' . $txid . PHP_EOL . $message;
+            $message = '@' . $mention . PHP_EOL . $message;
         }
 
         // Validate final message length
@@ -333,32 +366,108 @@ class Room
             return null;
         }
 
-        // Send message
+        // Cleanup session
-        if
+        $this->_memory->delete(
-        (
+            $session
-            $txid = $this->_kevacoin->kevaPut(
+        );
+
+        // Payment required, get new address and save message to the pending pool
+        if ($this->_config->kevachat->post->cost->kva > 0)
+        {
+            $time = time();
+
+            $query = $this->_database->prepare(
+                'INSERT INTO `pool` (
+                    `time`,
+                    `sent`,
+                    `expired`,
+                    `cost`,
+                    `address`,
+                    `namespace`,
+                    `key`,
+                    `value`
+                ) VALUES (
+                    :time,
+                    :sent,
+                    :expired,
+                    :cost,
+                    :address,
+                    :namespace,
+                    :key,
+                    :value
+                )'
+            );
+
+            $query->execute(
+                [
+                    ':time'      => $time,
+                    ':sent'      => 0,
+                    ':expired'   => 0,
+                    ':cost'      => $this->_config->kevachat->post->cost->kva,
+                    ':address'   => $address = $this->_kevacoin->getNewAddress(),
+                    ':namespace' => $namespace,
+                    ':key'       => sprintf('%s@anon', $time),
+                    ':value'     => $message
+                ]
+            );
+
+            return $this->_database->lastInsertId();
+        }
+
+        // Publications free, send post immediately
+        else
+        {
+            return $this->_kevacoin->kevaPut(
                 $namespace,
                 sprintf(
                     '%s@anon',
                     time()
                 ),
                 $message
-            )
-        )
-        {
-            // Cleanup session
-            $this->_memory->delete(
-                $session
             );
-
+        }
-            // Success
-            return $txid;
     }
 
-        return null;
+    public function sent(string $namespace, mixed $id, ?string $address)
+    {
+        // Transaction requires payment
+        if ($address)
+        {
+            return str_replace(
+                [
+                    '{logo}',
+                    '{id}',
+                    '{address}',
+                    '{amount}',
+                    '{expires}',
+                    '{room}'
+                ],
+                [
+                    file_get_contents(
+                        __DIR__ . '/../../logo.ascii'
+                    ),
+                    $id,
+                    $address,
+                    $this->_config->kevachat->post->cost->kva,
+                    date(
+                        'c',
+                        $this->_config->kevachat->post->pool->timeout + time()
+                    ),
+                    $this->_link(
+                        sprintf(
+                            '/room/%s',
+                            $namespace
+                        )
+                    )
+                ],
+                file_get_contents(
+                    __DIR__ . '/../view/pool.gemini'
+                )
+            );
         }
 
-    public function sent(string $namespace, string $txid)
+        // Free post
+        else
         {
             return str_replace(
                 [
@@ -370,7 +479,7 @@ class Room
                     file_get_contents(
                         __DIR__ . '/../../logo.ascii'
                     ),
-                $txid,
+                    $id,
                     $this->_link(
                         sprintf(
                             '/room/%s',
@@ -383,6 +492,7 @@ class Room
                 )
             );
         }
+    }
 
     private function _post(
         string $namespace,

src/crontab.php

@@ -0,0 +1,237 @@
+<?php
+
+// Check arguments
+if (empty($argv[1]))
+{
+    exit(
+        sprintf(
+            _('[%s] [error] Configured hostname required as argument!'),
+            date('c')
+        ) . PHP_EOL
+    );
+}
+
+// Check host configured
+if (!file_exists(__DIR__ . '/../host/' . $argv[1] . '/config.json'))
+{
+    exit(
+        sprintf(
+            _('[%s] [error] Host "%s" not configured!'),
+            date('c'),
+            $argv[1]
+        ) . PHP_EOL
+    );
+}
+
+// Prevent multi-thread execution
+$semaphore = sem_get(
+    crc32(__FILE__ . $argv[1]), 1
+);
+
+if (false === sem_acquire($semaphore, true))
+{
+    exit(
+        sprintf(
+            _('[%s] [warning] Process locked by another thread!'),
+            date('c')
+        ) . PHP_EOL
+    );
+}
+
+// Init config
+$config = json_decode(
+    file_get_contents(
+        __DIR__ . '/../host/' . $argv[1] . '/config.json'
+    )
+);
+
+// Load dependencies
+require_once __DIR__ . '/../vendor/autoload.php';
+
+// Init kevacoin
+try
+{
+    $kevacoin = new \Kevachat\Kevacoin\Client(
+        $config->kevacoin->server->protocol,
+        $config->kevacoin->server->host,
+        $config->kevacoin->server->port,
+        $config->kevacoin->server->username,
+        $config->kevacoin->server->password
+    );
+}
+
+catch (Exception $exception)
+{
+    exit(
+        print_r(
+            $exception,
+            true
+        )
+    );
+}
+
+// Init database
+try
+{
+    $database = new \PDO(
+        sprintf(
+            'sqlite:%s/../host/%s',
+            __DIR__,
+            $config->sqlite->server->name
+        ),
+        $config->sqlite->server->user,
+        $config->sqlite->server->password
+    );
+
+    $database->setAttribute(
+        \PDO::ATTR_ERRMODE,
+        \PDO::ERRMODE_EXCEPTION
+    );
+
+    $database->setAttribute(
+        \PDO::ATTR_DEFAULT_FETCH_MODE,
+        \PDO::FETCH_OBJ
+    );
+
+    $database->setAttribute(
+        \PDO::ATTR_TIMEOUT,
+        $config->sqlite->server->timeout
+    );
+
+    $database->query(
+        file_get_contents(
+            __DIR__ . '/../data.sql'
+        )
+    );
+}
+
+catch (Exception $exception)
+{
+    exit(
+        print_r(
+            $exception,
+            true
+        )
+    );
+}
+
+// Init room list
+$rooms = [];
+
+foreach ((array) $kevacoin->kevaListNamespaces() as $value)
+{
+    $rooms[$value['namespaceId']] = mb_strtolower($value['displayName']);
+}
+
+// Skip room lock events
+if (empty($rooms))
+{
+    exit(
+        sprintf(
+            _('[%s] [error] Could not init room list!'),
+            date('c')
+        ) . PHP_EOL
+    );
+}
+
+// Process pool queue
+$total = 0;
+
+foreach ($database->query('SELECT * FROM `pool` WHERE `sent` = 0 AND `expired` = 0')->fetchAll() as $pool)
+{
+    // Payment received, send to blockchain
+    if ($kevacoin->getReceivedByAddress($pool->address, $config->kevachat->post->pool->confirmations) >= $pool->cost)
+    {
+        // Check physical wallet balance
+        if ($kevacoin->getBalance() <= $pool->getCost())
+        {
+            exit(
+                sprintf(
+                    _('[%s] [error] Insufficient wallet funds!'),
+                    date('c')
+                ) . PHP_EOL
+            );
+        }
+
+        // Check namespace is valid
+        if (!isset($rooms[$pool->namespace]))
+        {
+            print(
+                sprintf(
+                    _('[%s] [warning] Could not found "%s" in room list!'),
+                    date('c'),
+                    $pool->namespace
+                ) . PHP_EOL
+            );
+
+            continue;
+        }
+
+        // Send to blockchain
+        if ($txid = $kevacoin->kevaPut($pool->namespace, $pool->key, $pool->value))
+        {
+            // Update status
+            $database->query(
+                sprintf(
+                    'UPDATE `pool` SET `sent` = %d WHERE `id` = %d LIMIT 1',
+                    time(),
+                    $pool->id
+                )
+            );
+
+            print(
+                sprintf(
+                    _('[%s] [notice] Record ID "%d" sent to blockchain with transaction ID "%s"'),
+                    date('c'),
+                    $pool->id,
+                    $txid
+                ) . PHP_EOL
+            );
+        }
+
+        else
+        {
+            print(
+                sprintf(
+                    _('[%s] [error] Could not send record ID "%d" to blockchain!'),
+                    date('c'),
+                    $pool->id,
+                    $txid
+                ) . PHP_EOL
+            );
+        }
+    }
+
+    // Record expired
+    else if (time() >= $pool->time + $this->_config->kevachat->post->pool->timeout)
+    {
+        // Update status
+        $database->query(
+            sprintf(
+                'UPDATE `pool` SET `expired` = %d WHERE `id` = %d LIMIT 1',
+                time(),
+                $pool->id
+            )
+        );
+
+        print(
+            sprintf(
+                _('[%s] [notice] Record ID "%d" expired.'),
+                date('c'),
+                $pool->id,
+                $txid
+            ) . PHP_EOL
+        );
+    }
+
+    // Update counter
+    $total++;
+}
+
+print(
+    sprintf(
+        _('[%s] [notice] Records processed: %d'),
+        date('c'),
+        $total
+    ) . PHP_EOL
+);

src/server.php

@@ -160,10 +160,23 @@ $server->setHandler(
                     {
                         // Request post message
                         if (empty($request->getQuery()))
+                        {
+                            if ($config->kevachat->post->cost->kva)
+                            {
+                                $response->setMeta(
+                                    sprintf(
+                                        _('Enter your message text (cost: %s KVA)'),
+                                        $config->kevachat->post->cost->kva
+                                    )
+                                );
+                            }
+
+                            else
                             {
                                 $response->setMeta(
-                                'text/plain'
+                                    _('Enter your message text:')
                                 );
+                            }
 
                             $response->setCode(
                                 10
@@ -182,9 +195,9 @@ $server->setHandler(
                             );
 
                             // Success, redirect to this room page
-                            if ($txid = $room->post($matches[1], null, $matches[2], $request->getQuery()))
+                            if ($id = $room->post($matches[1], null, $matches[2], $request->getQuery(), $address))
                             {
-                                if ($result = $room->sent($matches[1], $txid))
+                                if ($result = $room->sent($matches[1], $id, $address))
                                 {
                                     $response->setContent(
                                         $result
@@ -204,10 +217,23 @@ $server->setHandler(
                     {
                         // Request post message
                         if (empty($request->getQuery()))
+                        {
+                            if ($config->kevachat->post->cost->kva)
+                            {
+                                $response->setMeta(
+                                    sprintf(
+                                        _('Enter your message text (cost: %s KVA)'),
+                                        $config->kevachat->post->cost->kva
+                                    )
+                                );
+                            }
+
+                            else
                             {
                                 $response->setMeta(
-                                'text/plain'
+                                    _('Enter your message text:')
                                 );
+                            }
 
                             $response->setCode(
                                 10
@@ -226,9 +252,9 @@ $server->setHandler(
                             );
 
                             // Success, redirect to this room page
-                            if ($txid = $room->post($matches[1], $matches[2], $matches[3], $request->getQuery()))
+                            if ($id = $room->post($matches[1], $matches[2], $matches[3], $request->getQuery(), $address))
                             {
-                                if ($result = $room->sent($matches[1], $txid))
+                                if ($result = $room->sent($matches[1], $id, $address))
                                 {
                                     $response->setContent(
                                         $result

src/view/pool.gemini

@@ -0,0 +1,15 @@
+```{logo}```
+
+# Success!
+
+Your message saved in pool with ID #{id}
+
+Send exactly {amount} KVA to this address:
+
+```
+{address}
+```
+
+Invoice expires at {expires}
+
+=> {room} Done!