Use the voucher adjustment amount for redeeming

app/services/vine/voucher_redeemer_service.rb

@@ -11,16 +11,16 @@ def initialize(order: )
 
     def redeem
       # Do nothing if we don't have a vine voucher added to the order
-      voucher_adjustment = order.voucher_adjustments.first
-      @voucher = voucher_adjustment&.originator
+      @voucher_adjustment = order.voucher_adjustments.first
+      @voucher = @voucher_adjustment&.originator
 
-      return true if voucher_adjustment.nil? || !@voucher.is_a?(Vouchers::Vine)
+      return true if @voucher_adjustment.nil? || !@voucher.is_a?(Vouchers::Vine)
 
       return false if vine_settings.nil?
 
       call_vine_api
 
-      voucher_adjustment.close
+      @voucher_adjustment.close
 
       true
     rescue Faraday::ClientError => e
@@ -44,9 +44,10 @@ def call_vine_api
       jwt_service = Vine::JwtService.new(secret: vine_settings["secret"])
       vine_api = Vine::ApiService.new(api_key: vine_settings["api_key"], jwt_generator: jwt_service)
 
-      # Voucher amount is stored in dollars, VINE expect cents
+      # Voucher adjustment amount is stored in dollars and negative, VINE expect cents
+      amount = -1 * @voucher_adjustment.amount * 100
       vine_api.voucher_redemptions(
-        @voucher.external_voucher_id, @voucher.external_voucher_set_id, (@voucher.amount * 100)
+        @voucher.external_voucher_id, @voucher.external_voucher_set_id, amount
       )
     end
 

spec/services/vine/voucher_redeemer_service_spec.rb

@@ -12,7 +12,7 @@
 
   let(:vine_voucher) {
     create(:vine_voucher, code: 'some_code', enterprise: distributor,
-                          amount: 6, external_voucher_id: voucher_id,
+                          amount: 50, external_voucher_id: voucher_id,
                           external_voucher_set_id: voucher_set_id )
   }
   let(:voucher_id) { "9d316d27-0dad-411a-8953-316a1aaf7742" }
@@ -56,8 +56,9 @@
       before { add_voucher(vine_voucher) }
 
       it "redeems the voucher with VINE" do
+        # Order pre discount total is $10, so we expect to redeen 1000 cents
         expect(vine_api_service).to receive(:voucher_redemptions)
-          .with(voucher_id, voucher_set_id, 600)
+          .with(voucher_id, voucher_set_id, 1000)
           .and_return(mock_api_response(data:))
 
         voucher_redeemer_service.redeem