feat(webhooks): Webhook source verification (#2069)

crates/api_models/src/admin.rs

@@ -641,6 +641,8 @@ pub struct MerchantConnectorCreate {
 pub struct MerchantConnectorWebhookDetails {
     #[schema(value_type = String, example = "12345678900987654321")]
     pub merchant_secret: Secret<String>,
+    #[schema(value_type = String, example = "12345678900987654321")]
+    pub additional_secret: Option<Secret<String>>,
 }
 
 /// Response of creating a new Merchant Connector for the merchant account."

crates/api_models/src/payments.rs

@@ -2474,6 +2474,8 @@ pub struct ApplepaySessionTokenResponse {
     pub connector_reference_id: Option<String>,
     /// The public key id is to invoke third party sdk
     pub connector_sdk_public_key: Option<String>,
+    /// The connector merchant id
+    pub connector_merchant_id: Option<String>,
 }
 
 #[derive(Debug, Eq, PartialEq, serde::Serialize, Clone, ToSchema)]

crates/api_models/src/webhooks.rs

@@ -114,3 +114,8 @@ pub enum OutgoingWebhookContent {
     #[schema(value_type = DisputeResponse)]
     DisputeDetails(Box<disputes::DisputeResponse>),
 }
+
+pub struct ConnectorWebhookSecrets {
+    pub secret: Vec<u8>,
+    pub additional_secret: Option<masking::Secret<String>>,
+}