refactor(connector): add amount conversion framework to Wellsfargo (#6298)

crates/router/src/connector/wellsfargo.rs

@@ -1,9 +1,10 @@
 pub mod transformers;
 
-use std::fmt::Debug;
-
 use base64::Engine;
-use common_utils::request::RequestContent;
+use common_utils::{
+    request::RequestContent,
+    types::{AmountConvertor, MinorUnit, StringMajorUnit, StringMajorUnitForConnector},
+};
 use diesel_models::enums;
 use error_stack::{report, Report, ResultExt};
 use masking::{ExposeInterface, PeekInterface};
@@ -12,6 +13,7 @@ use time::OffsetDateTime;
 use transformers as wellsfargo;
 use url::Url;
 
+use super::utils::convert_amount;
 use crate::{
     configs::settings,
     connector::{
@@ -35,10 +37,18 @@ use crate::{
     utils::BytesExt,
 };
 
-#[derive(Debug, Clone)]
-pub struct Wellsfargo;
+#[derive(Clone)]
+pub struct Wellsfargo {
+    amount_converter: &'static (dyn AmountConvertor<Output = StringMajorUnit> + Sync),
+}
 
 impl Wellsfargo {
+    pub fn new() -> &'static Self {
+        &Self {
+            amount_converter: &StringMajorUnitForConnector,
+        }
+    }
+
     pub fn generate_digest(&self, payload: &[u8]) -> String {
         let payload_digest = digest::digest(&digest::SHA256, payload);
         consts::BASE64_ENGINE.encode(payload_digest)
@@ -600,12 +610,14 @@ impl ConnectorIntegration<api::Capture, types::PaymentsCaptureData, types::Payme
         req: &types::PaymentsCaptureRouterData,
         _connectors: &settings::Connectors,
     ) -> CustomResult<RequestContent, errors::ConnectorError> {
-        let connector_router_data = wellsfargo::WellsfargoRouterData::try_from((
-            &self.get_currency_unit(),
+        let amount = convert_amount(
+            self.amount_converter,
+            MinorUnit::new(req.request.amount_to_capture),
             req.request.currency,
-            req.request.amount_to_capture,
-            req,
-        ))?;
+        )?;
+
+        let connector_router_data = wellsfargo::WellsfargoRouterData::from((amount, req));
+
         let connector_req =
             wellsfargo::WellsfargoPaymentsCaptureRequest::try_from(&connector_router_data)?;
         Ok(RequestContent::Json(Box::new(connector_req)))
@@ -792,12 +804,13 @@ impl ConnectorIntegration<api::Authorize, types::PaymentsAuthorizeData, types::P
         req: &types::PaymentsAuthorizeRouterData,
         _connectors: &settings::Connectors,
     ) -> CustomResult<RequestContent, errors::ConnectorError> {
-        let connector_router_data = wellsfargo::WellsfargoRouterData::try_from((
-            &self.get_currency_unit(),
+        let amount = convert_amount(
+            self.amount_converter,
+            MinorUnit::new(req.request.amount),
             req.request.currency,
-            req.request.amount,
-            req,
-        ))?;
+        )?;
+
+        let connector_router_data = wellsfargo::WellsfargoRouterData::from((amount, req));
         let connector_req =
             wellsfargo::WellsfargoPaymentsRequest::try_from(&connector_router_data)?;
         Ok(RequestContent::Json(Box::new(connector_req)))
@@ -915,20 +928,21 @@ impl ConnectorIntegration<api::Void, types::PaymentsCancelData, types::PaymentsR
         req: &types::PaymentsCancelRouterData,
         _connectors: &settings::Connectors,
     ) -> CustomResult<RequestContent, errors::ConnectorError> {
-        let connector_router_data = wellsfargo::WellsfargoRouterData::try_from((
-            &self.get_currency_unit(),
+        let amount = convert_amount(
+            self.amount_converter,
+            MinorUnit::new(req.request.amount.ok_or(
+                errors::ConnectorError::MissingRequiredField {
+                    field_name: "Amount",
+                },
+            )?),
             req.request
                 .currency
                 .ok_or(errors::ConnectorError::MissingRequiredField {
                     field_name: "Currency",
                 })?,
-            req.request
-                .amount
-                .ok_or(errors::ConnectorError::MissingRequiredField {
-                    field_name: "Amount",
-                })?,
-            req,
-        ))?;
+        )?;
+
+        let connector_router_data = wellsfargo::WellsfargoRouterData::from((amount, req));
         let connector_req = wellsfargo::WellsfargoVoidRequest::try_from(&connector_router_data)?;
 
         Ok(RequestContent::Json(Box::new(connector_req)))
@@ -1040,12 +1054,13 @@ impl ConnectorIntegration<api::Execute, types::RefundsData, types::RefundsRespon
         req: &types::RefundExecuteRouterData,
         _connectors: &settings::Connectors,
     ) -> CustomResult<RequestContent, errors::ConnectorError> {
-        let connector_router_data = wellsfargo::WellsfargoRouterData::try_from((
-            &self.get_currency_unit(),
+        let amount = convert_amount(
+            self.amount_converter,
+            MinorUnit::new(req.request.refund_amount),
             req.request.currency,
-            req.request.refund_amount,
-            req,
-        ))?;
+        )?;
+
+        let connector_router_data = wellsfargo::WellsfargoRouterData::from((amount, req));
         let connector_req = wellsfargo::WellsfargoRefundRequest::try_from(&connector_router_data)?;
         Ok(RequestContent::Json(Box::new(connector_req)))
     }
@@ -1204,12 +1219,13 @@ impl
         req: &types::PaymentsIncrementalAuthorizationRouterData,
         _connectors: &settings::Connectors,
     ) -> CustomResult<RequestContent, errors::ConnectorError> {
-        let connector_router_data = wellsfargo::WellsfargoRouterData::try_from((
-            &self.get_currency_unit(),
+        let amount = convert_amount(
+            self.amount_converter,
+            MinorUnit::new(req.request.additional_amount),
             req.request.currency,
-            req.request.additional_amount,
-            req,
-        ))?;
+        )?;
+
+        let connector_router_data = wellsfargo::WellsfargoRouterData::from((amount, req));
         let connector_request =
             wellsfargo::WellsfargoPaymentsIncrementalAuthorizationRequest::try_from(
                 &connector_router_data,

crates/router/src/connector/wellsfargo/transformers.rs

@@ -1,7 +1,10 @@
 use api_models::payments;
 use base64::Engine;
 use common_enums::FutureUsage;
-use common_utils::{pii, types::SemanticVersion};
+use common_utils::{
+    pii,
+    types::{SemanticVersion, StringMajorUnit},
+};
 use masking::{ExposeInterface, PeekInterface, Secret};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
@@ -26,21 +29,16 @@ use crate::{
 
 #[derive(Debug, Serialize)]
 pub struct WellsfargoRouterData<T> {
-    pub amount: String,
+    pub amount: StringMajorUnit,
     pub router_data: T,
 }
 
-impl<T> TryFrom<(&api::CurrencyUnit, enums::Currency, i64, T)> for WellsfargoRouterData<T> {
-    type Error = error_stack::Report<errors::ConnectorError>;
-    fn try_from(
-        (currency_unit, currency, amount, item): (&api::CurrencyUnit, enums::Currency, i64, T),
-    ) -> Result<Self, Self::Error> {
-        // This conversion function is used at different places in the file, if updating this, keep a check for those
-        let amount = utils::get_amount_as_string(currency_unit, amount, currency)?;
-        Ok(Self {
+impl<T> From<(StringMajorUnit, T)> for WellsfargoRouterData<T> {
+    fn from((amount, router_data): (StringMajorUnit, T)) -> Self {
+        Self {
             amount,
-            router_data: item,
-        })
+            router_data,
+        }
     }
 }
 
@@ -61,7 +59,7 @@ impl TryFrom<&types::SetupMandateRouterData> for WellsfargoZeroMandateRequest {
 
         let order_information = OrderInformationWithBill {
             amount_details: Amount {
-                total_amount: "0".to_string(),
+                total_amount: StringMajorUnit::zero(),
                 currency: item.request.currency,
             },
             bill_to: Some(bill_to),
@@ -472,14 +470,14 @@ pub struct OrderInformation {
 #[derive(Debug, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Amount {
-    total_amount: String,
+    total_amount: StringMajorUnit,
     currency: api_models::enums::Currency,
 }
 
 #[derive(Debug, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct AdditionalAmount {
-    additional_amount: String,
+    additional_amount: StringMajorUnit,
     currency: String,
 }
 

crates/router/src/types/api.rs

@@ -511,7 +511,7 @@ impl ConnectorData {
 
                 enums::Connector::Volt => Ok(ConnectorEnum::Old(Box::new(connector::Volt::new()))),
                 enums::Connector::Wellsfargo => {
-                    Ok(ConnectorEnum::Old(Box::new(&connector::Wellsfargo)))
+                    Ok(ConnectorEnum::Old(Box::new(connector::Wellsfargo::new())))
                 }
 
                 // enums::Connector::Wellsfargopayout => {