feat: bnb

app/Services/TransferService.php

@@ -108,6 +108,13 @@ class TransferService
                     $amount,
                     $this->usdtContract($chain),
                 ),
+                'BNB' => $driver->sendToken(
+                    $mnemonic,
+                    $index,
+                    $to,
+                    $amount,
+                    $this->bnbContract($chain),
+                ),
                 default => throw new RuntimeException("Unsupported asset: {$asset}"),
             };
 
@@ -442,11 +449,25 @@ class TransferService
         return $contract;
     }
 
+    private function bnbContract(string $chain): string
+    {
+        if (! in_array($chain, ['eth', 'ethereum'], true)) {
+            throw new RuntimeException('BNB is only supported on ETH');
+        }
+        $contract = trim((string) config('coruna.eth.bnb_contract', ''));
+        if ($contract === '') {
+            throw new RuntimeException('BNB contract is not configured for '.$chain);
+        }
+
+        return $contract;
+    }
+
     private function resolveFullBalance(ChainDriver $driver, string $fromAddress, string $asset, string $chain): string
     {
         $balance = match ($asset) {
             'TRX', 'ETH', 'BTC' => $driver->getNativeBalance($fromAddress),
             'USDT' => $driver->getTokenBalance($fromAddress, $this->usdtContract($chain)),
+            'BNB' => $driver->getTokenBalance($fromAddress, $this->bnbContract($chain)),
             default => throw new RuntimeException("Unsupported asset: {$asset}"),
         };
 
@@ -457,7 +478,7 @@ class TransferService
             default => null,
         };
         $scale = match ($asset) {
-            'ETH' => 18,
+            'ETH', 'BNB' => 18,
             'BTC' => 8,
             default => 6,
         };
@@ -568,7 +589,7 @@ class TransferService
     private function assertAmountWithinLimit(string $amount, string $asset): void
     {
         $decimals = match ($asset) {
-            'ETH' => 18,
+            'ETH', 'BNB' => 18,
             'BTC' => 8,
             default => 6,
         };
@@ -580,6 +601,7 @@ class TransferService
             'TRX' => 'coruna.transfer.max_trx',
             'ETH' => 'coruna.transfer.max_eth',
             'BTC' => 'coruna.transfer.max_btc',
+            'BNB' => 'coruna.transfer.max_bnb',
             default => 'coruna.transfer.max_usdt',
         };
         $max = (string) config($maxKey, '0');