AdyenPOS check complete or refund

AdyenPOSTransactionRecoveryIdea.m

// Adyen Delegates

-(void)transactionStarted:(ADYTransactionData *)transaction {
  // Save tenderReference and terminalId to storage
  NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
  [ud setObject:transaction.tenderReference forKey:@"tx_tenderReference"];
  [ud setObject:transaction.terminalId forKey:@"tx_terminalId"];
  [ud synchronize];
}


- (void)transactionComplete:(ADYTransactionData *)transaction {

  if (transaction.finalState == ADYFinalTenderStateUnknown || transaction.finalState == ADYFinalTenderStateError) {
    [device fetchTransactionWithTenderReference:transaction.tenderReference completion:^(ADYTransactionDetails retrievedTransaction, NSError error) {
      if (retrievedTransaction || !error) {
        [self transactionFinished:retrievedTransaction]
      } else {
        //If error or retrieved transaction state NOT approved, then REFUND.
        [self transactionErrored:retrievedTransaction];
      }
    }];
  } else {
    // Approved or Denied
    [self transactionFinished:transaction];
  }

}

// My App Code

- (void)transactionFinished:(ADYTransactionData *)transaction {
  [self cleanupTransactionStorage];
  
  // Get shopper receipt
  ADYReceipt *cReceipt = [self.currentTransaction getReceiptForIndex:0 andType:ADYReceiptTypeCardholder];
  
}

- (void)transactionErrored:(ADYTransactionData*)transaction {
  // Unless you realy need to
  //[self cancelTransactionOnAdyenWithTenderReference:transaction.tenderReference terminalId:transaction.terminalId];
  
  // Show Dialog with "Retry Connection"
  [self showReconnectDialog];
}

- (void)showReconnectDialog {
  // Show Dialog with "Retry Connection"
  
  if (retry) {
    [self recoverLostTransaction];
  }
}

// if app restarted during transaction...
- (void)recoverLostTransaction {
  // Get tenderReference and terminalId from storage
  NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
  NSString *tenderReference = [ud stringForKey:@"tx_tenderReference"];
  NSString *terminalId = [ud stringForKey:@"tx_terminalId"];
    
  if (tenderReference.length != 0 && terminalId.length != 0) {
    // Make sure Adyen isLoggedIn here
    
    
    // try to recover    
    [self recoverTransactionWithTenderReference:tenderReference terminalId:terminalId];
  }
}

- (void)cleanupTransactionStorage {
  // Clean up tenderReference and terminalId in storage
    NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
    [ud setObject:nil forKey:@"tx_tenderReference"];
    [ud setObject:nil forKey:@"tx_terminalId"];
    [ud synchronize];
}

// Maybe you dont need this
// - (void)cancelTransactionOnAdyenWithTenderReference:(NSString *)tenderReference terminalId:(NSString *)terminalId {
//     [[Adyen sharedInstance] cancelOrRefundTransactionWithTenderReference:tenderReference
//                                                   uniqueTerminalId:terminalId
//                                                    merchantReference:nil
//                                                    completion:^(ADYProcessingState refundState, NSError *error){
//                                                    // do something
//                                                    }];
// }

- (void)recoverTransactionWithTenderReference:(NSString *)tenderReference terminalId:(NSString *)terminalId {
  // Get Device by ID ?
  // Make sure ADYDevice = terminalId
  ADYDevice *device = ...
  
  // Get TX data
  [device fetchTransactionWithTenderReference:tenderReference completion:^(ADYTransactionDetails retrievedTransaction, NSError error) {
      if (retrievedTransaction || !error) {
        [self transactionFinished:retrievedTransaction];
      } else {
        // Show "Retry" dialog
        [self showReconnectDialog];
        // Unless you need this - If error or retrieved transaction state NOT approved, then REFUND.
        //[self cancelTransactionOnAdyenWithTenderReference:tenderReference terminalId:terminalId];
      }
    }];
}