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U.S. Bank Europe DAC. Registered in Ireland – Number 418442..  Registered Office: Block F1, Cherrywood Business Park, Dublin 18, D18 W2X7, Ireland.
U.S. Bank Europe DAC, trading as Elavon Merchant Services, is regulated by the Central Bank of Ireland.
 
U.S. Bank Europe DAC. Registered in Ireland with Companies Registration Office. The liability of the member is limited. United Kingdom branch registered in England and Wales under the number BR022122.
U.S. Bank Europe DAC, trading as Elavon Merchant Services, is a credit institution authorised and regulated by the Central Bank of Ireland.  Authorised by the Prudential Regulation Authority.  Subject to regulation by the Financial Conduct Authority and limited regulation by the Prudential Regulation Authority.  Details about the extent of our regulation by the Prudential Regulation Authority are available from us on request.

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POS can call this to check that BMS credentials (bmsUsername and bmsPassword) are valid.


## Code samples

### CWS 

#### Request

```json
{
 "method" : "validateBmsCredentials",
 "requestId" : "7571358",
 "targetType" : "paymentGatewayConverge",
 "version" : "1.0",
 "parameters" : {
 "paymentGatewayId" : "6f95a650-b56f-4b45-88d6-b2f53d55e4f6"
 }
}
```

#### Response - credentials are valid

```json
{
 "requestId" : "7571358",
 "statusDetails" : "REQUEST_ACCEPTED",
 "data" : {
 "paymentGatewayCommand" : {
 "completed" : true,
 "eventQueue" : [ ],
 "paymentTransactionData" : {
 "result" : "SUCCESS"
 },
 "warnings" : [ ]
 }
 }
}
```

#### Response - credentials are invalid 

```json
{
 "requestId" : "7571361",
 "statusDetails" : "REQUEST_ACCEPTED",
 "data" : {
 "paymentGatewayCommand" : {
 "completed" : true,
 "eventQueue" : [ ],
 "paymentTransactionData" : {
 "result" : "FAILED",
 "errors" : [ "ECLCommerceError ECLAccountInvalidCredentials" ]
 },
 "warnings" : [ ]
 }
 }
}
```

### Java

Create an instance of *com.elavon.commerce.ECLAccountValidationListener*, as shown below.

```java
// The following code is copied from MainActivity.java in the sample application code.
// The code displays results on UI.
 
ECLAccountValidationListener delegate = new ECLAccountValidationListener()
{
 @Override
 public void accountDidValidate(ECLAccountInterface eclAccountInterface)
 {
 displayMessageInProgressView("validate BMS Credentials - succeeded", false);
 }
 
 @Override
 public void accountDidFailToValidate(ECLAccountInterface eclAccountInterface, ECCError eccError)
 {
 displayErrorInProgressView("validate BMS Credentials - failed", eccError);
 }
};
```

Then pass the instance to method `validateBmsCredentials` on interface `com.elavon.commerce.ECLAccountInterface`. CSDK internally validates the combination of bmsUsername and bmsPassword provided by the POS.

If the BMS cannot validate the credentials, *ECLCommerceError.Codes.ECLAccountInvalidCredentials* will be returned in *ECLAccountValidationListener.accountDidFailToValidate*.

```java
TransactionSavedState.INSTANCE.account.validateBmsCredentials(delegate);
```

### Objective-C

Create a class implementing the ECLAccountValidationDelegate protocol and implement the methods accountDidValidate and accountDidFailToValidate, as shown below.

```objc
@interface ValidateBmsCredentialsDelegate : NSObject<ECLAccountValidationDelegate>
 
@property MainViewController *mainViewController;
 
@end
 
@implementation ValidateBmsCredentialsDelegate
 
- (void)accountDidValidate:(id<ECLAccountValidationDelegate>)delegate {
 [_mainViewController addStatusString:@"BMS credentials validated\n"];
}
 
- (void)accountDidFailToValidate:(id<ECLAccountValidationDelegate>)delegate error:(NSError *)error {
 [_mainViewController addStatusString:[NSString stringWithFormat:@"BMS credentials failed to be validated: %@\n", [error debugDescription]]];
}
 
@end
```

Then, pass an instance of the delegate to the method *validateBmsCredentials* of protocol *ECLAccountProtocol*. CSDK internally validates the combination of bmsUsername and bmsPassword provided by the POS.

If the BMS cannot validate the credentials, an ECLError with code *ECLAccountInvalidCredentials* will be returned in accountDidFailToValidate.

```objc
// inside MainViewController implementation
 
id<ECLAccountValidationDelegate> delegate = [[ValidateBmsCredentialsDelegate alloc] initWithMainViewController:self];
[_account validateBmsCredentials:delegate];
```

### C\#

```c#
// Asynchronous
StartValidateBmsCredentials(String paymentGatewayId, NotifyCWSEvent ne, PaymentTransactionComplete ptc) 
 
// Synchronous
PaymentTransactionResults results = m_CWS.ValidateBmsCredentials(String paymentGatewayId);
MyValidateBmsCredentialsComplete(results, results.Warnings);
 
// Do something with the response
public void MyValidateBmsCredentialsComplete(PaymentTransactionResults paymentResults, String[] warnings)
{
 lock (myPaymentCompleteLock)
 {
 Log("----------- Validate BMS Credentials Complete ------------");
```

Validate BMS credentials

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