(Objective-C) PayPal - Store Credit Card in Vault

Saves the buyer's credit card information to PayPal's vault. This avoids storing credit card details on your server and thus PCI compliance is no longer an issue.

Note: For sandbox calls, you can use the credit card numbers provided in your sandbox test accounts.

Note: This example requires Chilkat v9.5.0.65 or greater.

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#import <CkoJsonObject.h>
#import <CkoStringBuilder.h>
#import <CkoRest.h>

// Note: Requires Chilkat v9.5.0.65 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
CkoJsonObject *jsonToken = [[CkoJsonObject alloc] init];
[jsonToken LoadFile: @"qa_data/tokens/paypal.json"];

// Build the Authorization request header field value.
CkoStringBuilder *sbAuth = [[CkoStringBuilder alloc] init];
// token_type should be "Bearer"
[sbAuth Append: [jsonToken StringOf: @"token_type"]];
[sbAuth Append: @" "];
[sbAuth Append: [jsonToken StringOf: @"access_token"]];

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
CkoRest *rest = [[CkoRest alloc] init];
BOOL bAutoReconnect = YES;
BOOL success = [rest Connect: @"api.sandbox.paypal.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Build the JSON containing the credit card data.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
json.EmitCompact = NO;
[json UpdateString: @"payer_id" value: @"user12345"];
[json UpdateString: @"type" value: @"visa"];
[json UpdateString: @"number" value: @"4032031087659974"];
[json UpdateString: @"expire_month" value: @"9"];
[json UpdateString: @"expire_year" value: @"2021"];
[json UpdateString: @"first_name" value: @"Joe"];
[json UpdateString: @"last_name" value: @"Shopper"];

NSLog(@"%@",[json Emit]);

// The JSON created by the above code is this:

// 	{ 
// 	  "payer_id": "user12345",
// 	  "type": "visa",
// 	  "number": "4032031087659974",
// 	  "expire_month": "9",
// 	  "expire_year": "2021",
// 	  "first_name": "Joe",
// 	  "last_name": "Shopper"
// 	}

[rest AddHeader: @"Authorization" value: [sbAuth GetAsString]];
[rest AddHeader: @"Content-Type" value: @"application/json"];

// Send the POST request containign the JSON in the request body, and get the JSON response.
CkoStringBuilder *sbJsonRequest = [[CkoStringBuilder alloc] init];
json.EmitCompact = YES;
[json EmitSb: sbJsonRequest];
CkoStringBuilder *sbJsonResponse = [[CkoStringBuilder alloc] init];
success = [rest FullRequestSb: @"POST" uriPath: @"/v1/vault/credit-card" requestBody: sbJsonRequest responseBody: sbJsonResponse];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

json.EmitCompact = NO;
[json LoadSb: sbJsonResponse];

NSLog(@"%@%d",@"Response Status Code = ",[rest.ResponseStatusCode intValue]);

// Did we get a 201 success response?
if ([rest.ResponseStatusCode intValue] != 201) {
    NSLog(@"%@",[json Emit]);
    NSLog(@"%@",@"Failed.");
    return;
}

// a sample JSON response is shown below.
NSLog(@"%@",[json Emit]);

// // The "id" is what will be used to create a payment with the stored credit card.
NSLog(@"%@%@",@"card ID: ",[json StringOf: @"id"]);
NSLog(@"%@",@"success.");

// ---------------------------------------------------------
// A sample JSON response:

// 	{ 
// 	  "id": "CARD-52W84623JH8043102LA3CLGA",
// 	  "state": "ok",
// 	  "payer_id": "user12345",
// 	  "type": "visa",
// 	  "number": "xxxxxxxxxxxx9974",
// 	  "expire_month": "9",
// 	  "expire_year": "2021",
// 	  "first_name": "Joe",
// 	  "last_name": "Shopper",
// 	  "valid_until": "2019-11-23T00:00:00Z",
// 	  "create_time": "2016-11-23T23:26:16Z",
// 	  "update_time": "2016-11-23T23:26:16Z",
// 	  "links": [
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/vault/credit-card/CARD-52W84623JH8043102LA3CLGA",
// 	      "rel": "self",
// 	      "method": "GET"
// 	    },
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/vault/credit-card/CARD-52W84623JH8043102LA3CLGA",
// 	      "rel": "delete",
// 	      "method": "DELETE"
// 	    },
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/vault/credit-card/CARD-52W84623JH8043102LA3CLGA",
// 	      "rel": "patch",
// 	      "method": "PATCH"
// 	    }
// 	  ]
//