diff --git a/.github/actions/upload-artifact b/.github/actions/upload-artifact
new file mode 160000
index 0000000..6027e3d
--- /dev/null
+++ b/.github/actions/upload-artifact
@@ -0,0 +1 @@
+Subproject commit 6027e3dd177782cd8ab9af838c04fd81a07f1d47
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..bbabb30
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,39 @@
+name: Build ocktopus
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install PHP dependencies
+        run: composer install --no-dev --optimize-autoloader
+
+      - name: Prepare deploy folder
+        run: |
+          mkdir deploy
+          rsync -av --progress ./ ./deploy \
+            --exclude='.env' \
+            --exclude='storage' \
+            --exclude='node_modules' \
+            --exclude='tests' \
+            --exclude='vendor/bin' \
+            --exclude='deploy' \
+            --exclude='.git'
+
+          cd deploy
+          tar -czf ../deploy.tar.gz .
+
+      - name: Upload artifact
+        uses: ./.github/actions/upload-artifact
+        with:
+          name: laravel-deploy-package
+          path: deploy.tar.gz
diff --git a/app/Http/Controllers/TransactionController.php b/app/Http/Controllers/TransactionController.php
new file mode 100644
index 0000000..b7de874
--- /dev/null
+++ b/app/Http/Controllers/TransactionController.php
@@ -0,0 +1,180 @@
+<?php 
+
+namespace App\Http\Controllers;
+
+use App\Models\Articles;
+use App\Models\MarketPrices;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Http;
+
+class TransactionController extends Controller
+{
+    public function handle(Request $request)
+    {
+        $badgeId = $request->input('badge_id');
+        $items = $request->input('items'); // [[article_id, quantity], ...]
+        $sessionId = $request->input('session_id');
+
+        $systemId = env('WEEZEVENT_SYSTEM_ID');
+        $appKey = env('WEEZEVENT_APP_KEY');
+        $fundId = env('WEEZEVENT_FUND_ID');
+
+        $mappedItems = [];
+        foreach ($items as [$articleId, $quantity]) {
+            $categoryId = $this->getCategoryFromArticle($articleId);
+            if ($categoryId == 11 || $categoryId == 10) {    // Si c'est une bière pression ou bouteille, on remplace par le prix du marché
+                $firstTransaction = Http::withHeaders([  // Première transaction de l'article (qui aura été mis à 0e) pour les stats
+                    'accept-language' => 'fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7',
+                ])->post('https://api.nemopay.net/services/POSS3/transaction?system_id='.$systemId.'&app_key='.$appKey.'&sessionid='.$sessionId, [
+                    'badge_id' => $badgeId,
+                    'obj_ids' => [[$articleId, $quantity]],
+                    'fun_id' => $fundId,
+                ])->throw();
+
+                $currentPrice = $this->getCurrentMarketPrice($articleId);
+                $replacementArticleId = $this->mapPriceToBeerArticle($currentPrice);
+                for ($i = 0; $i < $quantity; $i++) {
+                    $currentPrice = $this->getCurrentMarketPrice($articleId);
+                    $replacementArticleId = $this->mapPriceToBeerArticle($currentPrice);
+                    
+                    $mappedItems[] = [$replacementArticleId, 1];  // On passe les articles 1 par 1 au cas où le prix augmente 
+                    $this->updateMarket($articleId, 1);
+                }
+            } else {
+                $mappedItems[] = [$articleId, $quantity];
+            }
+        }
+
+        $response = Http::withHeaders([
+            'accept-language' => 'fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7',
+        ])->post('https://api.nemopay.net/services/POSS3/transaction?system_id='.$systemId.'&app_key='.$appKey.'&sessionid='.$sessionId, [
+            'badge_id' => $badgeId,
+            'obj_ids' => $mappedItems,
+            'fun_id' => $fundId,
+        ])->throw();
+
+        return response()->json($response->json()); 
+    }
+
+    private function getCategoryFromArticle($articleId)
+    {
+        $article = Articles::where('article_id', $articleId)->first() ?? null;
+        return $article ? $article->category_id : null;
+    }
+
+    private function getCurrentMarketPrice($articleId)
+    {
+        return MarketPrices::where('article_id', $articleId)
+            ->first()
+            ->price ?? 1.80;
+    }
+
+    private function mapPriceToBeerArticle($price)  // Calcule l'id de la bière sachant que 60 centimes c'est l'id 23658 et qu'on augmente l'id de 1 par centime
+    {
+        $rounded = number_format($price, 2, '.', '');
+        $basePrice = 0.60;
+        $baseId = 23658;
+
+        $diff = ($rounded - $basePrice) * 100; // nb centimes d'écart
+        $id = $baseId + (int)round($diff);  // l'ID part de baseId + centimes d'écart
+
+        if ($id < $baseId || $id > 23658 + 180) {  // Si le prix est inférieur à 0.60 ou spérieur à 2.40
+            return 23778; // Prix inconnu ? -> 1e80
+        }
+
+        return $id;
+    }
+
+    private function updateMarket($articleId, $quantity)
+    {
+        $maxPrice = 2.4;
+        $minPrice = 0.6;
+        $priceStep = 0.07;      // Plus ou moins de fluctuation sur le prix du marché
+        $balanceMarket = 1.80;   // Le marché se balance autour de cette valeur
+
+        $article = Articles::where('article_id', $articleId)->first();
+        if (!$article) return;
+
+        $categoryId = $article->category_id;
+        $allArticles = Articles::where('category_id', $categoryId)->get();
+        $nbArticles = $allArticles->count();
+
+        if ($nbArticles <= 1) return;
+
+        $weights = [];
+        $totalWeight = 0;
+        foreach ($allArticles as $otherArticle) {
+            if ($otherArticle->article_id == $articleId) continue;
+
+            $w = mt_rand(50, 150);
+            $weights[$otherArticle->article_id] = $w;
+            $totalWeight += $w;
+        }
+
+        foreach ($allArticles as $otherArticle) {
+            $currentPrice = MarketPrices::firstOrNew(
+                ['article_id' => $otherArticle->article_id]
+            );
+
+            if (!$currentPrice->exists) {
+                $currentPrice->price = 1.00;
+            }
+
+            $newPrice = $currentPrice->price;
+
+            if ($otherArticle->article_id == $articleId) {
+                $newPrice += $priceStep * $quantity;
+            } else {
+                $weight = $weights[$otherArticle->article_id];
+                $share = ($priceStep * $quantity) * ($weight / $totalWeight);
+                $newPrice -= $share;
+            }
+
+            $newPrice = max($minPrice, min($maxPrice, round($newPrice, 2)));
+
+            $currentPrice->price = $newPrice;
+            $currentPrice->updated_at = now();
+            $currentPrice->save();
+        }
+
+        $sum = 0;
+        foreach ($allArticles as $article) {
+            $marketPrice = MarketPrices::where('article_id', $article->article_id)->first();
+            $sum += $marketPrice ? $marketPrice->price : 1.00;
+        }
+
+        $mean = $sum / $nbArticles;
+        $delta = $balanceMarket - $mean;
+        $correction = round($delta, 4);
+
+        foreach ($allArticles as $article) {
+            $marketPrice = MarketPrices::where('article_id', $article->article_id)->first();
+            if (!$marketPrice) continue;
+
+            $adjusted = max($minPrice, min($maxPrice, round($marketPrice->price + $correction, 2)));
+            $marketPrice->price = $adjusted;
+            $marketPrice->save();
+        }
+    }
+
+    public function getPrices()
+    {
+        $articles = MarketPrices::all();
+
+        foreach ($articles as $article) {
+            $articleModel = Articles::where('article_id', $article->article_id)->first();
+            $article->article_name = $articleModel ? $articleModel->article_name : null;
+            $article->category_id = $articleModel ? $articleModel->category_id : null;
+        }
+
+        $response = [
+            'refresh' => 5000,
+            'data' => $articles,
+        ];
+
+        return response()->json($response)
+            ->header('Access-Control-Allow-Origin', '*')
+            ->header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS')
+            ->header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
+    }
+}
diff --git a/app/Models/Articles.php b/app/Models/Articles.php
new file mode 100644
index 0000000..702a044
--- /dev/null
+++ b/app/Models/Articles.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Articles extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['article_id', 'article_name', 'category_id'];
+}
diff --git a/app/Models/MarketPrices.php b/app/Models/MarketPrices.php
new file mode 100644
index 0000000..fa0bbdf
--- /dev/null
+++ b/app/Models/MarketPrices.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class MarketPrices extends Model
+{
+    use HasFactory;
+
+    protected $table = 'market_prices';
+    protected $primaryKey = 'article_id';
+    protected $keyType = 'int';
+    public $incrementing = false;
+    public $timestamps = true;
+
+    protected $fillable = ['article_id', 'price'];
+}
diff --git a/database/migrations/create_articles_table.php b/database/migrations/create_articles_table.php
new file mode 100644
index 0000000..35a95eb
--- /dev/null
+++ b/database/migrations/create_articles_table.php
@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('articles', function (Blueprint $table) {
+            $table->integer('article_id')->primary();
+            $table->string('article_name');
+            $table->integer('category_id');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('articles');
+    }
+};
diff --git a/database/migrations/create_market_prices_table.php b/database/migrations/create_market_prices_table.php
new file mode 100644
index 0000000..fab4133
--- /dev/null
+++ b/database/migrations/create_market_prices_table.php
@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('market_prices', function (Blueprint $table) {
+            $table->integer('article_id')->primary();
+            $table->decimal('price', 3, 2)->default(1.00);
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('market_prices');
+    }
+};
diff --git a/routes/api.php b/routes/api.php
index acdebed..e1d553d 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -3,6 +3,7 @@
 use App\Http\Controllers\BachController;
 use App\Http\Controllers\ExonerationController;
 use App\Http\Controllers\TodayConsumptionController;
+use App\Http\Controllers\TransactionController;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Route;
 
@@ -36,3 +37,5 @@
 
 // Exoneration d'un achat
 Route::post('/exoneration', [ExonerationController::class, 'storeExonerations']);
+
+Route::post('/transaction', [TransactionController::class, 'handle']);
\ No newline at end of file
diff --git a/routes/web.php b/routes/web.php
index 990be13..adc44c3 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -58,3 +58,5 @@
         return response()->json(['message' => 'Image not found'], 404);
     }
 })->name('download');
+
+Route::get('/bourse',[\App\Http\Controllers\TransactionController::class,'getPrices']);