Merge pull request #216 from afterpay/docs/payment-diagrams

docs: checkout sequence diagrams
afterpay · May 27, 2024 · ecf6dd7 · ecf6dd7
2 parents cf5e89f + 6cc0c9e
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diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
@@ -1,46 +1,56 @@
 GEM
   remote: https://rubygems.org/
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       ruby2_keywords (>= 0.0.4)
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-      jekyll-coffeescript (= 1.1.1)
+    gemoji (4.1.0)
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+      jekyll-avatar (= 0.8.0)
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       jekyll-commonmark-ghpages (= 0.4.0)
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 PLATFORMS

diff --git a/docs/_config.yml b/docs/_config.yml
@@ -26,3 +26,6 @@ callouts:
   info:
     title: Info
     color: blue
+
+mermaid:
+  version: "10.9.1"
diff --git a/docs/_includes/mermaid_config.js b/docs/_includes/mermaid_config.js
@@ -0,0 +1,11 @@
+{
+  theme: "base",
+  'themeVariables': {
+    'primaryColor': '#b2fce4',
+    'primaryBorderColor': '#dfdfdf',
+    'lineColor': '#F8B229',
+    'secondaryColor': '#006100',
+    'tertiaryColor': '#fff',
+    'fontFamily': 'system-ui, -apple-system, blinkmacsystemfont, "Segoe UI", roboto, "Helvetica Neue", arial, sans-serif, "Segoe UI Emoji"'
+  }
+}
diff --git a/docs/_sass/color_schemes/afterpay.scss b/docs/_sass/color_schemes/afterpay.scss
@@ -5,3 +5,4 @@ $feedback-color: rgb(223, 234, 246);
 $sidebar-color: $white;
 $nav-width: 18.75rem;
 $nav-width-md: 18.75rem;
+$content-width: 60rem;
diff --git a/docs/_sass/custom/custom.scss b/docs/_sass/custom/custom.scss
@@ -38,6 +38,10 @@ code {
     color: white;
     display: inline-block;
     padding: 4px;
+
+    &.language-mermaid {
+        display: block;
+    }
 }
 
 img {

diff --git a/docs/getting-started/cash-app-pay.md b/docs/getting-started/cash-app-pay.md
@@ -206,6 +206,83 @@ Afterpay.validateCashAppOrder(
 
 The `Approved` state will contain a **Grants list** object associated with it and it can be used with Afterpay's **Immediate Payment Capture** or **Deferred Payment Auth** API. Pass the **grant ID** along with the token to capture/authorize using a server-to-server request.
 
+## Sequence Diagram
+
+The below diagram describes the happy path.
+
+``` mermaid
+%%{
+  init: {
+    'theme': 'base',
+    'themeVariables': {
+      'primaryColor': '#00c846',
+      'primaryTextColor': '#FFFFFF',
+      'primaryBorderColor': '#dfdfdf',
+      'signalTextColor': '#000000',
+      'signalColor': '#000000',
+      'secondaryColor': '#006100',
+      'tertiaryColor': '#fff'
+    }
+  }
+}%%
+
+sequenceDiagram
+  participant App
+  participant Afterpay SDK
+  participant Cash App Pay SDK
+  participant Proxy Server
+  participant Afterpay API
+
+  Note over App,Afterpay API: Setup
+
+  App->>Afterpay SDK: Configure the SDK
+  Note over App,Afterpay SDK: Required for setting environment
+
+  App->>Cash App Pay SDK: Create Cash App Pay instance
+  Note over App,Cash App Pay SDK: Ensure same environment<br>as Afterpay SDK config
+
+  App->>App: Implement<br>deep linking
+
+  App->>Cash App Pay SDK: Register for state updates
+
+  Note over App,Afterpay API: Create Customer Request and Capture
+
+  App->>Proxy Server: Get Token Request
+
+  Proxy Server->>Afterpay API: Create Checkout Request
+  Note over Proxy Server,Afterpay API: Ensure same environment<br>as Afterpay SDK config<br><br>Request body should<br>contain `isCashAppPay: true`
+
+  Afterpay API-->>Proxy Server: Create Checkout Response
+  Note over Afterpay API,Proxy Server: Body contains a token
+
+  Proxy Server-->>App: Get Token Response
+
+  App->>Afterpay SDK: Sign the token
+
+  Afterpay SDK->>Afterpay API: Token signing request
+
+  Afterpay API-->>Afterpay SDK: Token signing response
+
+  Afterpay SDK-->>App: Decoded token data
+
+  App->>Cash App Pay SDK: Create a customer request
+
+  App->>Cash App Pay SDK: Authorize the customer request
+
+  App->>Afterpay SDK: Validate the order
+
+  App->>Proxy Server: Upon approved state send capture request
+  Note over App,Proxy Server: Pass the Grant Id (from the approved state)<br>and token in the body
+
+  Proxy Server->>Afterpay API: Capture Payment Request
+
+  Afterpay API-->>Proxy Server: Capture Payment Response
+
+  Proxy Server-->>App: Capture Payment Respnse
+
+  App->>App: Handle payment<br>capture response
+```
+
 [cash-on-maven]: https://central.sonatype.com/artifact/app.cash.paykit/core/1.0.3/overview
 [configure-afterpay]: ../configuring-the-sdk
 [sandbox-app]: https://developers.cash.app/docs/api/technical-documentation/sandbox/sandbox-app