feat: Solana chain

app/Models/WalletAddress.php

@@ -8,7 +8,7 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 class WalletAddress extends Model
 {
     /** @var list<string> */
-    public const COIN_COLUMNS = ['usdt', 'trx', 'eth', 'btc', 'bnb'];
+    public const COIN_COLUMNS = ['usdt', 'trx', 'eth', 'btc', 'bnb', 'sol'];
 
     /** Display decimal places per coin (UI). */
     public const DISPLAY_DECIMALS = [
@@ -17,11 +17,12 @@ class WalletAddress extends Model
         'eth' => 6,
         'btc' => 8,
         'bnb' => 6,
+        'sol' => 6,
     ];
 
     protected $fillable = [
         'device_id', 'address', 'chain_type',
-        'usdt', 'trx', 'eth', 'btc', 'bnb',
+        'usdt', 'trx', 'eth', 'btc', 'bnb', 'sol',
         'monitor', 'monitor_synced', 'monitor_failures', 'source', 'mnemonic_id', 'derive_index',
     ];
 
@@ -37,6 +38,7 @@ class WalletAddress extends Model
             'eth' => 'decimal:18',
             'btc' => 'decimal:8',
             'bnb' => 'decimal:18',
+            'sol' => 'decimal:9',
         ];
     }