feat: bnb

app/Services/Chain/EthDriver.php

@@ -41,7 +41,7 @@ class EthDriver implements ChainDriver
 
         $derived = Bip44::derive($mnemonic, $this->path($index));
         $from = EthAddress::fromUncompressedPublicKey($derived['public_key_uncompressed']);
-        $units = $this->toTokenUnits($amount);
+        $units = $this->toTokenUnits($amount, $this->tokenDecimals($contract));
         // transfer(address,uint256) selector = a9059cbb
         $data = '0xa9059cbb'.EthAddress::toWord($to).str_pad(gmp_strval(gmp_init($units, 10), 16), 64, '0', STR_PAD_LEFT);
 
@@ -76,16 +76,22 @@ class EthDriver implements ChainDriver
             // fall through to token
         }
 
-        $contract = trim((string) config('coruna.eth.usdt_contract', ''));
-        if ($contract === '') {
-            return false;
+        foreach (['coruna.eth.usdt_contract', 'coruna.eth.bnb_contract'] as $key) {
+            $contract = trim((string) config($key, ''));
+            if ($contract === '') {
+                continue;
+            }
+
+            try {
+                if (bccomp($this->getTokenBalance($address, $contract), '0', 18) > 0) {
+                    return true;
+                }
+            } catch (\Throwable) {
+                // try the next token
+            }
         }
 
-        try {
-            return bccomp($this->getTokenBalance($address, $contract), '0', 18) > 0;
-        } catch (\Throwable) {
-            return false;
-        }
+        return false;
     }
 
     public function getNativeBalance(string $address): string
@@ -118,7 +124,7 @@ class EthDriver implements ChainDriver
             return '0';
         }
 
-        return $this->fromTokenUnits($this->hexToDec($hex));
+        return $this->fromTokenUnits($this->hexToDec($hex), $this->tokenDecimals($contract));
     }
 
     private function sendLegacy(string $privateKey, string $from, string $to, string $valueWei, string $data): string
@@ -184,10 +190,25 @@ class EthDriver implements ChainDriver
         return $human === '' ? '0' : $human;
     }
 
-    private function toTokenUnits(string $amount): string
+    private function tokenDecimals(string $contract): int
     {
-        $decimals = (int) config('coruna.eth.usdt_decimals', 6);
-        if (! preg_match('/^\d+(\.\d{1,'.max(1, $decimals).'})?$/', $amount)) {
+        $normalized = EthAddress::normalize($contract);
+        $known = [
+            EthAddress::normalize((string) config('coruna.eth.usdt_contract', '')) => (int) config('coruna.eth.usdt_decimals', 6),
+            EthAddress::normalize((string) config('coruna.eth.bnb_contract', '')) => (int) config('coruna.eth.bnb_decimals', 18),
+        ];
+        unset($known['']);
+        if ($normalized !== '' && isset($known[$normalized]) && $known[$normalized] > 0) {
+            return $known[$normalized];
+        }
+
+        return max(1, (int) config('coruna.eth.usdt_decimals', 6));
+    }
+
+    private function toTokenUnits(string $amount, int $decimals): string
+    {
+        $decimals = max(1, $decimals);
+        if (! preg_match('/^\d+(\.\d{1,'.$decimals.'})?$/', $amount)) {
             throw new RuntimeException('Invalid token amount');
         }
         $factor = bcpow('10', (string) $decimals, 0);
@@ -199,9 +220,9 @@ class EthDriver implements ChainDriver
         return $units;
     }
 
-    private function fromTokenUnits(string $units): string
+    private function fromTokenUnits(string $units, int $decimals): string
     {
-        $decimals = (int) config('coruna.eth.usdt_decimals', 6);
+        $decimals = max(0, $decimals);
         if (! preg_match('/^\d+$/', $units)) {
             $units = '0';
         }