feat(router): add straight-through routing connector selection in payments (#153)

crates/api_models/src/enums.rs

@@ -468,6 +468,34 @@ pub enum MandateStatus {
     Revoked,
 }
 
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Default,
+    Eq,
+    PartialEq,
+    serde::Deserialize,
+    serde::Serialize,
+    strum::Display,
+    strum::EnumString,
+    frunk::LabelledGeneric,
+)]
+#[serde(rename_all = "snake_case")]
+#[strum(serialize_all = "snake_case")]
+pub enum Connector {
+    Aci,
+    Adyen,
+    Applepay,
+    Authorizedotnet,
+    Braintree,
+    Checkout,
+    #[default]
+    Dummy,
+    Klarna,
+    Stripe,
+}
+
 impl From<AttemptStatus> for IntentStatus {
     fn from(s: AttemptStatus) -> Self {
         match s {

crates/api_models/src/payments.rs

@@ -22,6 +22,7 @@ pub struct PaymentsRequest {
     pub merchant_id: Option<String>,
     #[serde(default, deserialize_with = "amount::deserialize_option")]
     pub amount: Option<Amount>,
+    pub connector: Option<api_enums::Connector>,
     pub currency: Option<String>,
     pub capture_method: Option<api_enums::CaptureMethod>,
     pub amount_to_capture: Option<i64>,