some fixes

src/api/invoice.rs

@@ -4,7 +4,7 @@
 //! Customers with a PayPal account can log in and pay the invoice with PayPal. Alternatively,
 //! customers can pay as a guest with a debit card or credit card. For more information, see the Invoicing Overview and the Invoicing Integration Guide.
 //!
-//! Reference: https://developer.paypal.com/docs/api/invoicing/v2/
+//! Reference: <https://developer.paypal.com/docs/api/invoicing/v2/>
 
 use std::borrow::Cow;
 
@@ -53,8 +53,8 @@ impl Endpoint for GenerateInvoiceNumber {
         reqwest::Method::POST
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        Some(&self.invoice_number)
+        Some(self.invoice_number.clone())
     }
 }
 
@@ -88,8 +88,8 @@ impl Endpoint for CreateDraftInvoice {
         reqwest::Method::POST
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        Some(&self.invoice)
+        Some(self.invoice.clone())
     }
 }
 
@@ -153,8 +153,8 @@ impl Endpoint for ListInvoices {
         reqwest::Method::GET
     }
 
-    fn query(&self) -> Option<&Self::Query> {
+    fn query(&self) -> Option<Self::Query> {
-        Some(&self.query)
+        Some(self.query.clone())
     }
 }
 
@@ -234,12 +234,12 @@ impl Endpoint for UpdateInvoice {
         reqwest::Method::PUT
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        Some(&self.invoice)
+        Some(self.invoice.clone())
     }
 
-    fn query(&self) -> Option<&Self::Query> {
+    fn query(&self) -> Option<Self::Query> {
-        Some(&self.query)
+        Some(self.query.clone())
     }
 }
 
@@ -274,8 +274,8 @@ impl Endpoint for CancelInvoice {
         reqwest::Method::POST
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        Some(&self.reason)
+        Some(self.reason.clone())
     }
 }
 
@@ -383,7 +383,7 @@ mod tests {
 
         let invoice = CreateDraftInvoice::new(payload);
 
-        let res = client.execute(&invoice).await?;
+        let _res = client.execute(&invoice).await?;
         Ok(())
     }
 }

src/api/orders.rs

@@ -1,6 +1,6 @@
 //! An order represents a payment between two or more parties. Use the Orders API to create, update, retrieve, authorize, and capture orders.
 //!
-//! https://developer.paypal.com/docs/api/orders/v2/
+//! <https://developer.paypal.com/docs/api/orders/v2/>
 
 use std::borrow::Cow;
 
@@ -41,8 +41,8 @@ impl Endpoint for CreateOrder {
         reqwest::Method::POST
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        Some(&self.order)
+        Some(self.order.clone())
     }
 }
 
@@ -97,10 +97,11 @@ pub struct PaymentSource {
 }
 
 /// The capture order endpoint body.
-#[derive(Debug, Serialize, Clone)]
+#[derive(Debug, Serialize, Clone, Default)]
 pub struct PaymentSourceBody {
     /// The payment source definition.
-    pub payment_source: PaymentSource,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub payment_source: Option<PaymentSource>,
 }
 
 /// Captures payment for an order. To successfully capture payment for an order,
@@ -111,7 +112,7 @@ pub struct CaptureOrder {
     /// The id of the order.
     pub order_id: String,
     /// The endpoint body.
-    pub body: Option<PaymentSourceBody>,
+    pub body: PaymentSourceBody,
 }
 
 impl CaptureOrder {
@@ -119,7 +120,7 @@ impl CaptureOrder {
     pub fn new(order_id: &str) -> Self {
         Self {
             order_id: order_id.to_string(),
-            body: None,
+            body: PaymentSourceBody::default(),
         }
     }
 }
@@ -139,8 +140,8 @@ impl Endpoint for CaptureOrder {
         reqwest::Method::POST
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        self.body.as_ref()
+        Some(self.body.clone())
     }
 }
 
@@ -152,7 +153,7 @@ pub struct AuthorizeOrder {
     /// The order id.
     order_id: String,
     /// The endpoint body.
-    pub body: Option<PaymentSourceBody>,
+    pub body: PaymentSourceBody,
 }
 
 impl AuthorizeOrder {
@@ -160,7 +161,7 @@ impl AuthorizeOrder {
     pub fn new(order_id: &str) -> Self {
         Self {
             order_id: order_id.to_string(),
-            body: None,
+            body: PaymentSourceBody::default(),
         }
     }
 }
@@ -180,8 +181,8 @@ impl Endpoint for AuthorizeOrder {
         reqwest::Method::POST
     }
 
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
-        self.body.as_ref()
+        Some(self.body.clone())
     }
 }
 
@@ -194,7 +195,7 @@ mod tests {
     #[tokio::test]
     async fn test_order() -> anyhow::Result<()> {
         let mut client = create_client().await;
-        client.get_access_token().await?;
+        client.get_access_token().await.expect("get access token error");
 
         let order = OrderPayloadBuilder::default()
             .intent(Intent::Authorize)
@@ -219,7 +220,11 @@ mod tests {
                     ..Default::default()
                 },
             )
-            .await?;
+            .await;
+
+        assert!(order_created.is_ok());
+
+        let order_created = order_created?;
 
         assert_ne!(order_created.id, "");
         assert_eq!(order_created.status, OrderStatus::Created);
@@ -235,14 +240,19 @@ mod tests {
                     ..Default::default()
                 },
             )
-            .await?;
+            .await;
+
+        assert!(show_order_result.is_ok());
+
+        let show_order_result = show_order_result?;
 
         assert_eq!(order_created.id, show_order_result.id);
         assert_eq!(order_created.status, show_order_result.status);
 
-        let capture_order = CaptureOrder::new(&show_order_result.id);
+        let authorize_order = AuthorizeOrder::new(&show_order_result.id);
 
-        let _res = client.execute(&capture_order).await?;
+        let res = client.execute(&authorize_order).await;
+        assert!(res.is_err()); // Fails with ORDER_NOT_APPROVED
 
         Ok(())
     }

src/api/payments.rs

@@ -1,6 +1,6 @@
 //! Call the Payments API to authorize payments, capture authorized payments, refund payments that have already been captured, and show payment information.
 //!
-//! Reference: https://developer.paypal.com/docs/api/payments/v2/
+//! Reference: <https://developer.paypal.com/docs/api/payments/v2/>
 
 use std::borrow::Cow;
 
@@ -42,8 +42,4 @@ impl Endpoint for GetAuthorizedPayment {
     fn method(&self) -> reqwest::Method {
         reqwest::Method::GET
     }
-
-    fn body(&self) -> Option<&Self::Body> {
-        None
-    }
 }

src/client.rs

@@ -13,7 +13,7 @@ use crate::{
 
 /// Represents the access token returned by the OAuth2 authentication.
 ///
-/// https://developer.paypal.com/docs/api/get-an-access-token-postman/
+/// <https://developer.paypal.com/docs/api/get-an-access-token-postman/>
 #[derive(Debug, Deserialize)]
 pub struct AccessToken {
     /// The OAuth2 scopes.
@@ -196,7 +196,7 @@ impl Client {
         let mut url = endpoint.full_path(self.sandbox);
 
         if let Some(query) = endpoint.query() {
-            let query_string = serde_qs::to_string(query).expect("serialize the query correctly");
+            let query_string = serde_qs::to_string(&query).expect("serialize the query correctly");
             url.push_str(&query_string);
         }
 
@@ -204,7 +204,7 @@ impl Client {
         request = self.setup_headers(request, headers).await?;
 
         if let Some(body) = endpoint.body() {
-            request = request.json(body);
+            request = request.json(&body);
         }
 
         let res = request.send().await?;
@@ -225,7 +225,7 @@ impl Client {
 
     /// Executes the given endpoints with the default headers.
     ///
-    /// You must remember to call `get_access_token` first or this may fail due to not being authed.
+    /// You must remember to call [Client::get_access_token] first or this may fail due to not being authed.
     pub async fn execute<E>(&self, endpoint: &E) -> Result<E::Response, ResponseError>
     where
         E: Endpoint,

src/countries.rs

@@ -1,4 +1,4 @@
-//! Generated using https://github.com/edg-l/payhelper
+//! Generated using <https://github.com/edg-l/payhelper>
 
 use crate::errors::InvalidCountryError;
 use serde::{Deserialize, Serialize};

src/data/common.rs

@@ -8,7 +8,7 @@ use std::str::FromStr;
 
 /// The phone type.
 ///
-/// https://developer.paypal.com/docs/api/orders/v2/#definition-phone_with_type
+/// <https://developer.paypal.com/docs/api/orders/v2/#definition-phone_with_type>
 #[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Copy, Clone)]
 #[serde(rename_all = "SCREAMING_SNAKE_CASE")]
 #[allow(missing_docs)]

src/data/invoice.rs

@@ -569,7 +569,7 @@ pub struct InvoicePayload {
     pub refunds: Option<Refunds>,
 }
 
-/// Definition: https://developer.paypal.com/docs/api/invoicing/v2/#invoices_get
+/// Definition: <https://developer.paypal.com/docs/api/invoicing/v2/#invoices_get>
 #[skip_serializing_none]
 #[derive(Debug, Serialize, Deserialize, Clone, Builder)]
 #[builder(setter(strip_option, into))]

src/data/orders.rs

@@ -27,7 +27,7 @@ impl Default for Intent {
 
 /// Represents a payer name.
 ///
-/// https://developer.paypal.com/docs/api/orders/v2/#definition-payer.name
+/// <https://developer.paypal.com/docs/api/orders/v2/#definition-payer.name>
 #[derive(Debug, Serialize, Deserialize, Eq, PartialEq, Clone)]
 pub struct PayerName {
     /// When the party is a person, the party's given, or first, name.
@@ -80,7 +80,7 @@ pub struct TaxInfo {
 
 /// The customer who approves and pays for the order. The customer is also known as the payer.
 ///
-/// https://developer.paypal.com/docs/api/orders/v2/#definition-payer
+/// <https://developer.paypal.com/docs/api/orders/v2/#definition-payer>
 #[skip_serializing_none]
 #[derive(Debug, Default, Serialize, Deserialize, Clone, Builder)]
 pub struct Payer {
@@ -428,7 +428,7 @@ pub struct PurchaseUnit {
     pub id: Option<String>,
     /// The soft descriptor is the dynamic text used to construct the statement descriptor that appears on a payer's card statement.
     ///
-    /// More info here: https://developer.paypal.com/docs/api/orders/v2/#definition-purchase_unit_request
+    /// More info here: <https://developer.paypal.com/docs/api/orders/v2/#definition-purchase_unit_request>
     pub soft_descriptor: Option<String>,
     /// An array of items that the customer purchases from the merchant.
     pub items: Option<Vec<Item>>,

src/endpoint.rs

@@ -20,12 +20,12 @@ pub trait Endpoint {
     fn method(&self) -> reqwest::Method;
 
     /// The query to be used when calling this endpoint.
-    fn query(&self) -> Option<&Self::Query> {
+    fn query(&self) -> Option<Self::Query> {
         None
     }
 
     /// The body to be used when calling this endpoint.
-    fn body(&self) -> Option<&Self::Body> {
+    fn body(&self) -> Option<Self::Body> {
         None
     }
 
@@ -33,10 +33,14 @@ pub trait Endpoint {
     ///
     /// Automatically implemented.
     fn full_path(&self, is_sandbox: bool) -> String {
+        let relative_path = self.relative_path();
+
+        assert!(relative_path.starts_with('/'), "relative path must start with '/'");
+
         if is_sandbox {
-            format!("{}{}", SANDBOX_ENDPOINT, self.relative_path())
+            format!("{}{}", SANDBOX_ENDPOINT, relative_path)
         } else {
-            format!("{}{}", LIVE_ENDPOINT, self.relative_path())
+            format!("{}{}", LIVE_ENDPOINT, relative_path)
         }
     }
 }

src/lib.rs

@@ -7,6 +7,8 @@
 //!
 //! A rust library that wraps the [paypal api](https://developer.paypal.com/docs/api) asynchronously in a strongly typed manner.
 //! 
+//! If there is a missing endpoint that you need, you may try to implement the [Endpoint](endpoint::Endpoint) and pass it to [Client::execute](client::Client::execute)
+//!
 //! Currently in early development.
 //!
 
@@ -91,7 +93,7 @@ pub const LIVE_ENDPOINT: &str = "https://api-m.paypal.com";
 pub const SANDBOX_ENDPOINT: &str = "https://api-m.sandbox.paypal.com";
 /// Represents the query used in most GET api requests.
 ///
-/// Reference: https://developer.paypal.com/docs/api/reference/api-requests/#query-parameters
+/// Reference: <https://developer.paypal.com/docs/api/reference/api-requests/#query-parameters>
 ///
 /// Note: You can avoid most fields by the Default impl like so:
 /// ```
@@ -130,7 +132,7 @@ pub struct Query {
 
 /// Represents the optional header values used on paypal requests.
 ///
-/// https://developer.paypal.com/docs/api/reference/api-requests/#paypal-auth-assertion
+/// <https://developer.paypal.com/docs/api/reference/api-requests/#paypal-auth-assertion>
 #[derive(Debug, Default, Builder, Clone)]
 pub struct HeaderParams {
     /// The merchant payer id used on PayPal-Auth-Assertion