diff --git a/examples/payout_usage.php b/examples/payout_usage.php
index d14ab46..9f471bb 100644
--- a/examples/payout_usage.php
+++ b/examples/payout_usage.php
@@ -113,7 +113,7 @@ public function markPayoutAsPaid()
 
     public function approvePayout()
     {
-        $payoutId ='';
+        $payoutId = '';
         try {
             $client = new PullPayment($this->host, $this->apiKey);
             var_dump($client->approvePayout(
diff --git a/examples/store_onchain_wallet.php b/examples/store_onchain_wallet.php
index 99751ad..77a21e8 100644
--- a/examples/store_onchain_wallet.php
+++ b/examples/store_onchain_wallet.php
@@ -32,6 +32,21 @@ public function getStoreOnChainWalletOverview()
         }
     }
 
+    public function createStoreOnChainWallet()
+    {
+        $cryptoCode = 'BTC';
+
+        try {
+            $client = new StoreOnChainWallet($this->host, $this->apiKey);
+            var_dump($client->createStoreOnchainWallet(
+                $this->storeId,
+                $cryptoCode
+            ));
+        } catch (\Throwable $e) {
+            echo "Error: " . $e->getMessage();
+        }
+    }
+
     public function getStoreOnChainWalletFeeRate()
     {
         $cryptoCode = 'BTC';
@@ -171,3 +186,4 @@ public function getStoreOnChainWalletUTXOs()
 $store->getStoreOnChainWalletTransactions();
 //$store->getStoreOnChainWalletTransaction();
 //$store->getStoreOnChainWalletUTXOs();
+//$store->createStoreOnChainWallet();
diff --git a/src/Client/InvoiceCheckoutOptions.php b/src/Client/InvoiceCheckoutOptions.php
index e88d562..144ea0b 100644
--- a/src/Client/InvoiceCheckoutOptions.php
+++ b/src/Client/InvoiceCheckoutOptions.php
@@ -170,7 +170,7 @@ public function toArray(): array
 
             $lastIndex = strrpos($k, $separator);
             if ($lastIndex !== false) {
-                $k = substr($k, $lastIndex +1);
+                $k = substr($k, $lastIndex + 1);
             }
             $array[$k] = $v;
         }
diff --git a/src/Client/StoreOnChainWallet.php b/src/Client/StoreOnChainWallet.php
index 4633f54..0315a5c 100644
--- a/src/Client/StoreOnChainWallet.php
+++ b/src/Client/StoreOnChainWallet.php
@@ -35,6 +35,50 @@ public function getStoreOnChainWalletOverview(
         }
     }
 
+    public function createStoreOnChainWallet(
+        string $storeId,
+        string $cryptoCode,
+        ?string $existingMnemonic = null,
+        ?string $passphrase = null,
+        int $accountNumber = 0,
+        bool $savePrivateKeys = false,
+        bool $importKeysToRPC = false,
+        string $wordList = 'English',
+        int $wordCount = 12,
+        string $scriptPubKeyType = 'Segwit'
+    ): ResultStoreOnChainWallet {
+        $url = $this->getApiUrl() . 'stores/' .
+          urlencode($storeId) . '/payment-methods/onchain/' .
+          urlencode($cryptoCode) . '/generate';
+
+        $headers = $this->getRequestHeaders();
+        $method = 'POST';
+
+        $body = json_encode(
+            [
+              'existingMnemonic' => $existingMnemonic,
+              'passphrase' => $passphrase,
+              'accountNumber' => $accountNumber,
+              'savePrivateKeys' => $savePrivateKeys,
+              'importKeysToRPC' => $importKeysToRPC,
+              'wordList' => $wordList,
+              'wordCount' => $wordCount,
+              'scriptPubKeyType' => $scriptPubKeyType
+            ],
+            JSON_THROW_ON_ERROR
+        );
+
+        $response = $this->getHttpClient()->request($method, $url, $headers, $body);
+
+        if ($response->getStatus() === 200) {
+            return new ResultStoreOnChainWallet(
+                json_decode($response->getBody(), true, 512, JSON_THROW_ON_ERROR)
+            );
+        } else {
+            throw $this->getExceptionByStatusCode($method, $url, $response);
+        }
+    }
+
     public function getStoreOnChainWalletFeeRate(
         string $storeId,
         string $cryptoCode,