feat: Solana chain

database/migrations/2026_09_23_000010_add_sol_to_wallet_addresses.php

@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Native SOL balance column for Solana addresses.
+ * USDT on Solana lives in the existing `usdt` column (SPL USDT).
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('wallet_addresses', function (Blueprint $table) {
+            $table->decimal('sol', 36, 9)->nullable()->after('bnb');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('wallet_addresses', function (Blueprint $table) {
+            $table->dropColumn('sol');
+        });
+    }
+};