Optimize getting parsed tx from tx hash

.env.example

@@ -1,8 +1,9 @@
 # Client-side environment variables must be prefixed with NEXT_PUBLIC_
 
 # Solana Payment Configuration
-# TODO: Use different RPC URL
-NEXT_PUBLIC_SOLANA_RPC_URL=https://skilled-prettiest-seed.solana-mainnet.quiknode.pro/eeecfebd04e345f69f1900cc3483cbbfea02a158
+# Run the solana proxy to setup RPC and WS URLs: https://git.vdb.to/LaconicNetwork/solana-proxy
+NEXT_PUBLIC_SOLANA_RPC_URL=
+NEXT_PUBLIC_SOLANA_WS_URL=
 NEXT_PUBLIC_SOLANA_TOKEN_MINT_ADDRESS=71Jvq4Epe2FCJ7JFSF7jLXdNk1Wy4Bhqd9iL6bEFELvg
 NEXT_PUBLIC_SOLANA_TOKEN_SYMBOL=GOR
 

src/app/api/registry/route.ts

@@ -3,7 +3,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import axios from 'axios';
 import assert from 'assert';
 
-import { Connection } from '@solana/web3.js';
+import { Connection, ParsedTransactionWithMeta } from '@solana/web3.js';
 
 import { verifyUnusedSolanaPayment } from '@/utils/solana-verify';
 import { transferLNTTokens } from '@/services/laconic-transfer';
@@ -167,6 +167,7 @@ export async function POST(request: NextRequest) {
     // First check if the request body is valid JSON
     let url, txHash, senderPublicKey, paymentMethod;
     let connection: Connection;
+    let parsedTx: ParsedTransactionWithMeta | null;
 
     try {
       const body = await request.json();
@@ -186,6 +187,8 @@ export async function POST(request: NextRequest) {
         }, { status: 400 });
       }
 
+      parsedTx = tx;
+
       const signerKeys = tx.transaction.message.accountKeys
         .filter(k => k.signer)
         .map(k => k.pubkey.toBase58());
@@ -243,9 +246,13 @@ export async function POST(request: NextRequest) {
     const requiredAmountInBaseUnits = requiredTokenInfo.requiredAmountInBaseUnits;
     const expectedTokenAmount = Math.round(requiredAmountInBaseUnits - ALLOWED_SLIPPAGE_FACTOR * requiredAmountInBaseUnits);
 
+    if (!parsedTx) {
+      throw new Error(`Unable to find the tx with hash: ${txHash}`)
+    }
+
     const solanaPaymentResult = await verifyUnusedSolanaPayment(
       connection,
-      txHash,
+      parsedTx,
       new BN(expectedTokenAmount),
       paymentMethod,
     );
@@ -516,4 +523,4 @@ export async function POST(request: NextRequest) {
       message: error instanceof Error ? error.message : 'Unknown error',
     }, { status: 500 });
   }
-}
+}

src/components/WalletProviders.tsx

@@ -16,7 +16,10 @@ import { PaymentMethod } from '@/types';
 import '@solana/wallet-adapter-react-ui/styles.css';
 
 assert(process.env.NEXT_PUBLIC_SOLANA_RPC_URL, 'SOLANA_RPC_URL is required');
+assert(process.env.NEXT_PUBLIC_SOLANA_WS_URL, 'SOLANA_WS_URL is required');
+
 const SOLANA_RPC_URL = process.env.NEXT_PUBLIC_SOLANA_RPC_URL;
+const SOLANA_WS_URL = process.env.NEXT_PUBLIC_SOLANA_WS_URL;
 
 interface WalletProvidersProps {
   children: React.ReactNode;
@@ -59,7 +62,7 @@ export default function WalletProviders({ children }: WalletProvidersProps) {
   }, [allWallets, selectedPaymentMethod]);
 
   return (
-    <ConnectionProvider endpoint={endpoint}>
+    <ConnectionProvider endpoint={endpoint} config={{wsEndpoint: SOLANA_WS_URL}}>
       <WalletProvider wallets={wallets} autoConnect>
         <WalletModalProvider>
           {children}

src/utils/solana-verify.ts

@@ -1,6 +1,6 @@
 import BN from 'bn.js';
 
-import { Connection, ParsedInstruction, PartiallyDecodedInstruction } from '@solana/web3.js';
+import { Connection, ParsedInstruction, ParsedTransactionWithMeta, PartiallyDecodedInstruction } from '@solana/web3.js';
 import { TOKEN_PROGRAM_ID } from '@solana/spl-token';
 
 import { getRecipientAddress } from '@/services/solana';
@@ -9,12 +9,11 @@ import { PaymentMethod } from '../types';
 // Extract transaction info for native GOR transfers
 const extractTxInfo = async (
   connection: Connection,
-  transactionSignature: string,
+  parsedTx: ParsedTransactionWithMeta,
   paymentMethod: PaymentMethod
 ): Promise<{ authority: string; amount: string; destination: string }> => {
-  const result = await connection.getParsedTransaction(transactionSignature, 'confirmed');
 
-  if (!result) {
+  if (!parsedTx) {
     throw new Error('Transaction not found');
   }
 
@@ -23,7 +22,7 @@ const extractTxInfo = async (
   switch (paymentMethod) {
     case PaymentMethod.NAT_GOR:
       // Look for system program transfer instruction
-      transferInstruction = result.transaction.message.instructions.find(
+      transferInstruction = parsedTx.transaction.message.instructions.find(
         (instr) => 'parsed' in instr && instr.parsed.type === 'transfer'
       );
 
@@ -36,7 +35,7 @@ const extractTxInfo = async (
 
     case PaymentMethod.SPL_TOKEN:
       // Look for token transfer instruction using TOKEN_PROGRAM_ID
-      transferInstruction = result.transaction.message.instructions.find(
+      transferInstruction = parsedTx.transaction.message.instructions.find(
         (instr) => 'parsed' in instr && instr.programId.equals(TOKEN_PROGRAM_ID)
       );
 
@@ -68,7 +67,7 @@ const extractTxInfo = async (
 
 export const verifyUnusedSolanaPayment = async (
   connection: Connection,
-  transactionSignature: string,
+  parsedTx: ParsedTransactionWithMeta,
   expectedAmount: BN,
   paymentMethod: PaymentMethod,
 ): Promise<{
@@ -81,9 +80,7 @@ export const verifyUnusedSolanaPayment = async (
     // TODO: Check if provided signature is already used
 
     // Fetch transaction details
-    const transactionResult = await connection.getParsedTransaction(transactionSignature, 'confirmed');
-
-    if (!transactionResult) {
+    if (!parsedTx) {
       return {
         valid: false,
         reason: 'Transaction not found on Solana blockchain'
@@ -91,15 +88,15 @@ export const verifyUnusedSolanaPayment = async (
     }
 
     // Check if transaction was successful
-    if (transactionResult.meta?.err) {
+    if (parsedTx.meta?.err) {
       return {
         valid: false,
-        reason: `Transaction failed: ${JSON.stringify(transactionResult.meta.err)}`
+        reason: `Transaction failed: ${JSON.stringify(parsedTx.meta.err)}`
       };
     }
 
     // Check transaction timestamp (5-minute window)
-    const txTimestamp = transactionResult.blockTime ? new Date(transactionResult.blockTime * 1000) : null;
+    const txTimestamp = parsedTx.blockTime ? new Date(parsedTx.blockTime * 1000) : null;
     if (!txTimestamp) {
       return {
         valid: false,
@@ -119,7 +116,7 @@ export const verifyUnusedSolanaPayment = async (
     }
 
     // Extract transaction info based on payment method
-    const transferInfo = await extractTxInfo(connection, transactionSignature, paymentMethod);
+    const transferInfo = await extractTxInfo(connection, parsedTx, paymentMethod);
     const amount = transferInfo.amount;
     const authority = transferInfo.authority;
     const destination = transferInfo.destination;