diff --git a/src/services/paymentService.ts b/src/services/paymentService.ts
index a6a1459..3a0e83d 100644
--- a/src/services/paymentService.ts
+++ b/src/services/paymentService.ts
@@ -8,7 +8,6 @@ import {
 } from '@solana/spl-token'
 import { WalletType } from './types'
 
-// Constants remain the same
 const MTM_TOKEN_MINT: string = '97RggLo3zV5kFGYW4yoQTxr4Xkz4Vg2WPHzNYXXWpump'
 const PAYMENT_RECEIVER_ADDRESS: string = 'FFDx3SdAEeXrp6BTmStB4BDHpctGsaasZq4FFcowRobY'
 const SOLANA_RPC_URL: string = 'https://young-radial-orb.solana-mainnet.quiknode.pro/67612b364664616c29514e551bf5de38447ca3d4'
@@ -42,13 +41,24 @@ async function findAssociatedTokenAddress(
   )[0]
 }
 
+interface WalletAdapter {
+  signAndSendTransaction(transaction: Transaction): Promise<{ signature: string }>
+}
+
 export async function processMTMPayment(
   walletPublicKey: string,
   tokenAmount: number,
   walletType: WalletType
 ): Promise<PaymentResult> {
   try {
-    const wallet = window[walletType === 'phantom' ? 'phantom.solana' : 'solflare']
+    let wallet: WalletAdapter | null = null;
+    
+    if (walletType === 'phantom') {
+      wallet = window.phantom?.solana || null;
+    } else if (walletType === 'solflare') {
+      wallet = window.solflare || null;
+    }
+
     if (!wallet) {
       throw new Error(`${walletType} wallet not found`)
     }
@@ -63,7 +73,6 @@ export async function processMTMPayment(
       receiver: receiverPublicKey.toBase58(),
     })
 
-    // Find ATAs
     const senderATA = await findAssociatedTokenAddress(
       senderPublicKey,
       mintPublicKey
@@ -81,13 +90,11 @@ export async function processMTMPayment(
 
     const transaction = new Transaction()
 
-    // Check if accounts exist
     const [senderATAInfo, receiverATAInfo] = await Promise.all([
       connection.getAccountInfo(senderATA),
       connection.getAccountInfo(receiverATA),
     ])
 
-    // Create ATAs if they don't exist
     if (!receiverATAInfo) {
       console.log('Creating receiver token account')
       transaction.add(
@@ -112,7 +119,6 @@ export async function processMTMPayment(
       )
     }
 
-    // Add transfer instruction
     transaction.add(
       createTransferInstruction(
         senderATA,
@@ -150,4 +156,3 @@ export async function processMTMPayment(
     }
   }
 }
-