Coinbase iOS SDK

This library is deprecated.

Thank you all for your contributions.

Table of Contents

• Installation
• Basic usage
• RxSwift
• Examples
• Testing
• License

Installation

CocoaPods

CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

$ gem install cocoapods

To integrate Coinbase SDK into your Xcode project using CocoaPods, specify it in your Podfile:

pod 'coinbase-official', '~> 4.0'

Then, run the following command:

$ pod install

If you want to use the RxSwift extensions for Coinbase SDK add:

pod 'coinbase-official/RxSwift', '~> 4.0'

Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

To integrate Coinbase SDK into your Xcode project using Carthage, specify it in your Cartfile:

github "coinbase/coinbase-ios-sdk"

Run carthage update to build the framework and drag the built CoinbaseSDK.framework into your Xcode project. If you want to use the RxSwift extensions for Coinbase SDK add RxCoinbaseSDK.framework into your project as well.

Swift Package Manager

The Swift Package Manager is a tool for automating the distribution of Swift code and is integrated into the swift compiler.

Once you have your Swift package set up, adding Coinbase SDK as a dependency is as easy as adding it to the dependencies value of your Package.swift.

dependencies: [
        .package(url: "https://github.com/coinbase/coinbase-ios-sdk")
    ]

And in the target where you want to use it:

targets: [
    .target(
        name: "<project_name>",
        dependencies: ["CoinbaseSDK"])
]

If you want to use the RxSwift extensions for Coinbase SDK add to target’s dependencies: "RxCoinbaseSDK".

Important

Swift Package Manager currently does not support resources. Coinbase SDK requires additional resource files to work properly (Trusted SSL Certificates). If you want to use Swift Package Manager you should provide those resources manually.

You can find the required resources in Coinbase iOS SDK GitHub repository under Source/Supporting Files/PinnedCertificates path. Collect those files and add them to your project.

• Using Xcode:

  You should additionally configure CoinbaseSDK target. In tab Build Phases add new phase by selecting New Copy File Phase. Drag and Drop required resources to this phase.

• Using console:

  To provide the required resources you should copy them to a location with built files.

  Example: If required files are located in directory Resources and you building for x86_64-apple-macosx10.10 platform in debug mode then resources can be copied with the command:

  cp Resources/* ./.build/x86_64-apple-macosx10.10/debug

Basic usage

In source file where you want to use CoinbaseSDK add:

import CoinbaseSDK

If you want to use the RxSwift extensions for CoinbaseSDK using not CocoaPods, please import RxCoinbaseSDK by adding the following line:

import RxCoinbaseSDK

To use CoinbaseSDK you need to have an instance of Coinbase class. You can create a new Coinbase instance:

let coinbase = Coinbase()

Or you can use convenience static instance:

Coinbase.default

Authentication

To work with resources which require authentication you should provide a valid access token to Coinbase instance.

Access token can be provided either directly by setting its value to coinbase‘s property:

coinbase.accessToken = accessToken

or by passing it to the initializer:

let coinbase = Coinbase(accessToken: accessToken)

If you do not provide an access token to the instance of Coinbase you can successfully work with only the next resources:

1. CurrenciesResource
2. ExchangeRatesResource
3. PricesResource
4. TimeResource

Getting access token

To get an access token the Coinbase iOS SDK uses OAuth2 authentication.

You should call configure method on oauth property of Coinbase instance to set all required properties before calling any authorization method:

coinbase.oauth.configure(clientID: <client_id>,
                         clientSecret: <client_secret>,
                         redirectURI: <redirect_uri>)

Then you can initiate OAuth flow by calling beginAuthorization

try coinbase.oauth.beginAuthorization(scope: [Scope.Wallet.Accounts.read, ...])

It will redirect user into Safari browser where they can authorize your application.

In AppDelegate you should handle redirection back by calling coinbase.oauth.completeAuthorization method inside application(_:open:options:)

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        let handleCoinbaseOAuth = coinbase.oauth.completeAuthorization(url) { result in
            // setup coinbase, e.g. coinbase.accessToken = result.value?.accessToken
        }
        return handleCoinbaseOAuth
    }

To get a detailed guide on how to use OAuth2 with CoinbaseSDK read Getting Acess Token.

Note

Coinbase instace for completeAuthorization call should be the same as you used to call beginAuthorization method.

Important

Access token lifetime is pretty short and after the expiration, it should be refreshed with the refresh token.

You can perform refresh manually or allow auto-refresh by calling setRefreshStrategy with TokenRefreshStrategy.refresh on Coinbase instance.

Reed more about TokenRefreshStrategy in Token refreshing.

RxSwift

CoinbaseSDK provides wrappers that allow you to use it with RxSwift. To get more information about how to use it read page.

Examples

To see more details on how to work with CoinbaseSDK you can check sample app or read some Coinbase Examples.

Sample app

To be able to use Coinbase SDK iOS Example app you should setup OAuth2 application keys. You can get the required keys after creating Coinbase OAuth2 Application.

• Log in to your Coinbase account and create a new OAuth2 application (or get an existing one).
• In application details page you can get clientId, clientSecret and redirectUri.
• Open Coinbase workspace then inside iOS Example project fill empty values for OAuth2ApplicationKeys in Source/Constants.swift file.
• Register custom scheme used in your redirectURI. In Info.plist file add:

<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLName</key>
        <string>Coinbase OAuth Scheme</string>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>[redirect_uri_scheme]</string>
        </array>
    </dict>
</array>

Note:

Make sure that you used the same URI scheme in redirectURI constant and your Info.plist file.

For example, if your [redirect_uri_scheme] is com.example.app, then your redirect URI can be: com.example.app://callback

Testing

To be able to run tests, you should download dependencies. To do so, run:

carthage bootstrap --platform iOS

If you do not have Carthage installed, check the installation instructions.

After that, you can open Coinbase.xcworkspace and select CoinbaseSDK target and hit ⌘+U to start testing.

License

Coinbase is available under the Apache License 2.0. See LICENSE file for more info.