Rewrite /api/v1/subscriptions/enable handler to support more subscription types

docs/openapi.yaml

@@ -626,6 +626,8 @@ paths:
   /api/v1/subscriptions/authorize:
     get:
       summary: Get authorization for setting up Ethereum subscription.
+      security:
+        - tokenAuth: []
       parameters:
         - name: price
           in: query
@@ -647,6 +649,22 @@ paths:
   /api/v1/subscriptions/enable:
     post:
       summary: Enable subscriptions
+      security:
+        - tokenAuth: []
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                type:
+                  description: Subscription type
+                  type: string
+                  enum:
+                    - ethereum
+                    - monero
+              required:
+                - type
       responses:
         200:
           description: Successful operation

src/mastodon_api/subscriptions/types.rs

@@ -4,3 +4,12 @@ use serde::Deserialize;
 pub struct SubscriptionQueryParams {
     pub price: u64,
 }
+
+#[derive(Deserialize)]
+#[serde(tag = "type")]
+pub enum SubscriptionSettings {
+    #[serde(rename = "ethereum")]
+    Ethereum,
+    #[serde(rename = "monero")]
+    Monero { },
+}

src/mastodon_api/subscriptions/views.rs

@@ -13,8 +13,16 @@ use crate::ethereum::subscriptions::{
 use crate::mastodon_api::accounts::types::Account;
 use crate::mastodon_api::oauth::auth::get_current_user;
 use crate::models::profiles::queries::update_profile;
-use crate::models::profiles::types::{PaymentOption, ProfileUpdateData};
-use super::types::SubscriptionQueryParams;
+use crate::models::profiles::types::{
+    PaymentOption,
+    PaymentType,
+    ProfileUpdateData,
+};
+use crate::utils::currencies::Currency;
+use super::types::{
+    SubscriptionQueryParams,
+    SubscriptionSettings,
+};
 
 pub async fn authorize_subscription(
     auth: BearerAuth,
@@ -47,24 +55,40 @@ pub async fn subscriptions_enabled(
     config: web::Data<Config>,
     db_pool: web::Data<Pool>,
     maybe_blockchain: web::Data<Option<ContractSet>>,
+    subscription_settings: web::Json<SubscriptionSettings>,
 ) -> Result<HttpResponse, HttpError> {
     let db_client = &**get_database_client(&db_pool).await?;
     let mut current_user = get_current_user(db_client, auth.token()).await?;
+
+    let mut maybe_payment_option = None;
+    match subscription_settings.into_inner() {
+        SubscriptionSettings::Ethereum => {
             let contract_set = maybe_blockchain.as_ref().as_ref()
                 .ok_or(HttpError::NotSupported)?;
             let wallet_address = current_user
-        .public_wallet_address(&config.default_currency())
+                .public_wallet_address(&Currency::Ethereum)
                 .ok_or(HttpError::PermissionError)?;
-    let is_registered = is_registered_recipient(contract_set, &wallet_address)
-        .await.map_err(|_| HttpError::InternalError)?;
+            if !current_user.profile.payment_options
+                .any(PaymentType::EthereumSubscription)
+            {
+                let is_registered = is_registered_recipient(
+                    contract_set,
+                    &wallet_address,
+                ).await.map_err(|_| HttpError::InternalError)?;
                 if !is_registered {
                     return Err(ValidationError("recipient is not registered").into());
                 };
-
-    if current_user.profile.payment_options.is_empty() {
+                maybe_payment_option = Some(PaymentOption::EthereumSubscription);
+            };
+        },
+        SubscriptionSettings::Monero { } => {
+            todo!();
+        },
+    };
+    if let Some(payment_option) = maybe_payment_option {
         // Add payment option to profile
         let mut profile_data = ProfileUpdateData::from(&current_user.profile);
-        profile_data.payment_options = vec![PaymentOption::EthereumSubscription];
+        profile_data.payment_options.push(payment_option);
         current_user.profile = update_profile(
             db_client,
             &current_user.id,

src/models/profiles/types.rs

@@ -42,6 +42,7 @@ impl IdentityProofs {
 json_from_sql!(IdentityProofs);
 json_to_sql!(IdentityProofs);
 
+#[derive(PartialEq)]
 pub enum PaymentType {
     Link,
     EthereumSubscription,
@@ -81,6 +82,15 @@ pub enum PaymentOption {
     EthereumSubscription,
 }
 
+impl PaymentOption {
+    fn payment_type(&self) -> PaymentType {
+        match self {
+            Self::Link(_) => PaymentType::Link,
+            Self::EthereumSubscription => PaymentType::EthereumSubscription,
+        }
+    }
+}
+
 // Integer tags are not supported https://github.com/serde-rs/serde/issues/745
 // Workaround: https://stackoverflow.com/a/65576570
 impl<'de> Deserialize<'de> for PaymentOption {
@@ -110,10 +120,7 @@ impl Serialize for PaymentOption {
         where S: Serializer,
     {
         let mut map = serializer.serialize_map(None)?;
-        let payment_type = match self {
-            Self::Link(_) => PaymentType::Link,
-            Self::EthereumSubscription => PaymentType::EthereumSubscription,
-        };
+        let payment_type = self.payment_type();
         map.serialize_entry("payment_type", &i16::from(&payment_type))?;
 
         match self {
@@ -137,6 +144,14 @@ impl PaymentOptions {
         let Self(payment_options) = self;
         payment_options.is_empty()
     }
+
+    /// Returns true if payment option list contains at least one option
+    /// of the given type.
+    pub fn any(&self, payment_type: PaymentType) -> bool {
+        let Self(payment_options) = self;
+        payment_options.iter()
+            .any(|option| option.payment_type() == payment_type)
+    }
 }
 
 json_from_sql!(PaymentOptions);