Add priority fee when creating Stellar intent transaction

[hetfly]

Some intents are not created and transactions are being timed out / not being included in the blockchain.

To avoid this, please add priority fee to the transaction.

example of adding priority fee (the optimal amount is likely different, I haven't tested it):

  // Build your transaction
  const transaction = new TransactionBuilder(sourceAccount, {
    fee: '100', // Default fee
    networkPassphrase: Networks.TESTNET
  })
  .addOperation(/* your operation */)
  .setTimeout(30)
  .build();

  // Simulate first
  const simulation = await server.simulateTransaction(transaction);
  
  // Get the minimum resource fee required
  const minResourceFee = simulation.minResourceFee;
  
  // Set a higher fee for priority (base fee + resource fee + priority boost)
  const priorityFee = '10000'; // Higher priority fee in stroops
  const totalFee = (BigInt(priorityFee) + BigInt(minResourceFee)).toString();
  
  // Rebuild transaction with the higher fee
  const priorityTransaction = new TransactionBuilder(sourceAccount, {
    fee: totalFee,
    networkPassphrase: Networks.TESTNET
  })
  .addOperation(/* your operation */)
  .setTimeout(30)
  .build();
  
  // Sign and submit
  // ...
}