Dwolla Grid (OAuth 1) SDK

Simple library for gaining access to the Dwolla OAuth Rest APIs with only a few lines of code, based on the Linked-In SDK(https://github.com/ResultsDirect/LinkedIn-iPhone)!

Documentation & Example Code

Documentation is provided below and an example at https://github.com/dwolla/DwollaOAuthDemo.

Installation (XCode 4)

1. Download or Use Git Submodule
   1. Adding a git submodule to your project by using git submodule add git://github.com/dwolla/dwolla-sdk-ios.git DwollaOAuth
2. Use the "Add files to "...."" feature in XCode 4 to include the DwollaOAuth submodule folder:
   1. Make sure "Create groups for any folders" is checked.

OR

1. Download or Use Git Submodule
   1. Adding a git submodule to your project by using git submodule add git://github.com/dwolla/dwolla-sdk-ios.git DwollaOAuth
2. Use the "Add files to "...."" feature in XCode 4 to include each folder in the DwollaOAuth submodule folder:
   1. Make sure "Create groups for any folders" is checked.

(I'm not sure which one is the best, if you have a better idea on how to include these let me know)

You should now be able to build successfully

Usage

1. The view controller you wish to communicate with the Dwolla SDK will need to implement 2 interfaces:

    "DwollaOAuthEngineDelegate" and "DwollaAuthorizationControllerDelegate"

2. Next you will need to define 2 variables. A ###(DwollaOAuthEngine )### and a ###(UIViewController )###. The Engine will hold the Class which holds a majority of the logic for passing data to and from the Dwolla OAuth REST methods. The "UIViewController" is the authorization view that will pop up to do the verification and token processing for the OAuth workflow.

3. Next, you need to implement the functions for both Delegates:

   DwollaEngineDelegate

    #Is called  the AccessToken for storing. Tokens can store themselves with "storeInUserDefaultsWithServiceProviderName:prefix:"
    - (void)dwollaEngineAccessToken:(DwollaOAuthEngine *)engine setAccessToken:(DwollaToken *)token 
   
    #Is called when the DwollaEngine needs the AccessToken out of the data store. Tokens can be recalled with: "initWithUserDefaultsUsingServiceProviderName:prefix:"
    - (OAToken *)dwollaEngineAccessToken:(DwollaOAuthEngine *)engine 
   
    #Is called  results from OAuth REST calls. 'results' returns as an NSDictionary with the same structure as the JSON returned from Dwolla.
    - (void)dwollaEngine:(DwollaOAuthEngine *)engine requestSucceeded:(DwollaConnectionID *)identifier withResults:(id)results 
   
    #Is called  the error to you if a problem occured with a Rest call within the Engine.
    - (void)dwollaEngine:(DwollaOAuthEngine *)engine requestFailed:(DwollaConnectionID *)identifier withError:(NSError *)error 

   DwollaAuthorizationControllerDelegate

    #Is called if the user is successfully Authorized.
    - (void)dwollaAuthorizationControllerSucceeded:(DwollaAuthorizationController *)controller 
   
    #Is called if the user's authroization Fails.
    - (void)dwollaAuthorizationControllerFailed:(DwollaAuthorizationController *)controller 
   
    #Is called if the user cancels the Authorization.
    - (void)dwollaAuthorizationControllerCanceled:(DwollaAuthorizationController *)controller 

4. Next, you need to allocate your ###DwollaEngine### with your ###Consumer Key,Secret, Scope, and Callback###. NOTE: The callback in this isn't really used, we scrap the URL for the needed results. Would probably be best if was some sort of a "We are logining you in page".

    dwollaEngine = [[DwollaOAuthEngine 
                 engineWithConsumerKey:@"KEY" 
                 consumerSecret:@"SECRET"
                 scope: @"AccountAPI:AccountInfoFull|AccountAPI:Send|AccountAPI:Contacts|AccountAPI:Transactions|AccountAPI:Balance"
                 callback: @"http://www.<url>.com/" //Needs 'http://' and also trailing '/'
                 delegate:self] retain];  

5. You can try and make API calls through your ###DwollaEngine variable### at this point and it will attempt to grab the AccessToken using the Delegate function we created. If it can't find an Access Token the funciton you called will return 'nil'.

6. To Authorize a user, you just need to call:

    controller = [DwollaAuthorizationController authorizationControllerWithEngine:dwollaEngine delegate:self];
    if( controller ) {
           [self presentModalViewController:controller animated:YES];
    }

   This will open up the webview, get all tokens, pass them to the Engine and call your Delegate to save them.

   You NOW should be able to make full calls into the Dwolla API using any of the following functions:

    - (DwollaConnectionID *)accountInformationCurrentUser;
   
    - (DwollaConnectionID *)balanceCurrentUser;
   
    - (DwollaConnectionID *)accountInformationForUser:(NSString *) userIdentifier;
   
    - (DwollaConnectionID *)contactSearch:(NSString *) searchString 
                        withLimit:(NSInteger) limit 
                        withTypes:(NSString *) types;
   
    - (DwollaConnectionID *)transactionsSince:(NSString *) sinceDate 
                            withLimit:(NSInteger) limit 
                            withTypes:(NSString *) types;
   
    - (DwollaConnectionID *)sendMoneyWithPin:(NSString *) pin 
            withDestinationId:(NSString *) destinationId 
                   withAmount:(NSDecimalNumber *) amount 
                    withNotes:(NSString *) note 
          withDestinationType:(NSString *) type 
               withAssumeCost:(BOOL) assumeCost 
              withFundsSource:(NSString *) fundSource;
   
    - (DwollaConnectionID *)nearbySearchWithLongitude:(NSString *) longitude 
                                 withLatitude:(NSString *) latitude 
                                    withLimit:(NSInteger) limit
                                    withRange:(NSInteger) range;
   
    - (DwollaConnectionID *) registerWithEmail:(NSString *) email 
                          withPassword:(NSString *) password
                         withFirstName:(NSString *) firstName 
                          withLastName:(NSString *) lastName 
                              withType:(NSString *) accountType 
                      withOrganization:(NSString *) organization 
                               withEIN:(NSString *) ein 
                           withAddress:(NSString *) address 
                        withAddressTwo:(NSString *) address2 
                              withCity:(NSString *) city 
                             withState:(NSString *) state 
                               withZip:(NSString *) zip 
                             withPhone:(NSString *) phone 
                          withPhoneTwo:(NSString *) phone2
                               withPIN:(NSString *) pin 
                               withDOB:(NSString *) dob;

POSSIBLE ERRORS RETURNED FROM DWOLLA REST API

    SERVICE_ERROR, 
    INVALID_ACCOUNT_IDENTIFIER, 
    INVALID_ACCOUNT_CREDENTIALS, 
    ACCOUNT_TEMPORARILY_LOCKED, 
    NOTES_TOO_LONG, 
    INVALID_SOURCE_ID, 
    TWITTER_ID_NOT_LINKED, 
    FACEBOOK_ID_NOT_LINKED,
    SOURCE_ID_NOT_REGISTERED, 
    INSUFFICIENT_FUNDS, 
    INVALID_FUNDS_SOURCE, 
    INVALID_DESTINATION_ID, 
    DESTINATION_ID_NOT_REGISTERED, 
    INVALID_DESTINATION_TYPE, 
    INVALID_SINCE_DATE, 
    INVALID_START_DATE, 
    INVALID_END_DATE, 
    INVALID_PHONE_TYPE, 
    INVALID_LATITUDE_LONGITUDE