Add exponential backoff to payins

app/Console/Commands/CheckPendingPayins.php

@@ -24,6 +24,20 @@ public function handle()
         $controller = new LnAddressController();
 
         foreach ($pendingPayins as $payin) {
+
+            $last_check = $payin->last_check;
+            $retry = $payin->retry_check;
+
+            $expectedDelaySeconds = min(10 * (2 ** $retry), 600);
+
+            if (now()->timestamp - $last_check->timestamp < $expectedDelaySeconds) {
+                continue;
+            }
+
+            $payin->last_check = now();
+            $payin->retry_check = $retry + 1;
+            $payin->save();
+
             $invoiceStatus = $controller->getInvoiceStatus($payin->payment_hash);
 
             if (! $invoiceStatus) {
@@ -44,7 +58,7 @@ public function handle()
 
                 Log::info('Payin settled: '.$payin->id);
             } else {
-                // Log::info('Payin still pending: '.$payin->id);
+                Log::info('Payin still pending: '.$payin->id);
             }
         }
 

database/migrations/2024_06_24_164625_exponential_backoff_retry_payins.php

@@ -0,0 +1,30 @@
+<?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::table('payins', function (Blueprint $table) {
+            $table->timestamp('last_check')->after('updated_at')->useCurrent();
+            $table->integer('retry_check')->default(0)->after('last_check');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('payins', function (Blueprint $table) {
+            $table->dropColumn('last_check');
+            $table->dropColumn('retry_check');
+        });
+    }
+};