Better /monitor response type

1 files changed, 31 insertions, 9 deletions

diff --git a/core/api-corebank.rst b/core/api-corebank.rst
index 15e91537..e1df169e 100644
--- a/core/api-corebank.rst
+++ b/core/api-corebank.rst
@@ -1043,35 +1043,57 @@ Monitor
     factors to serve different views to their users.
 
   .. ts:def:: MonitorResponse
+    
+    // Union discriminated by the "type" field.
+    type MonitorResponse =
+      | MonitorJustPayouts
+      | MonitorWithCashout;
 
-    interface MonitorResponse {
+  .. ts:def:: MonitorJustPayouts
+
+    // Monitoring stats when conversion is not supported
+    interface MonitorJustPayouts {
+      type: "just-payouts";
+
+      // This number identifies how many payments were made by a
+      // Taler exchange to a merchant bank account in the internal
+      // currency, in the timeframe specified in the request.
+      talerPayoutCount: number;
+
+      // This amount accounts the overall *internal* currency that
+      // has been paid by a Taler exchange to a merchant internal
+      // bank account, in the timeframe specified in the request.
+      talerPayoutInternalVolume: Amount;
+    }
+
+  .. ts:def:: MonitorWithCashout
+
+    // Monitoring stats when conversion is supported
+    interface MonitorWithCashout {
+      type: "with-cashout";
 
       // This number identifies how many cashin operations
       // took place in the timeframe specified in the request.
       // This number corresponds to how many withdrawals have
       // been initiated by a wallet owner.  Note: wallet owners
       // are NOT required to be customers of the libeufin-bank.
-      // Only present if conversion is supported 
-      cashinCount?: number;
+      cashinCount: number;
 
       // This amount accounts how much external currency has been
       // spent to withdraw Taler coins in the internal currency.
       // The exact amount of internal currency being created can be
       // calculated using the advertised conversion rates.
-      // Only present if conversion is supported 
-      cashinExternalVolume?: Amount;
+      cashinExternalVolume: Amount;
 
       // This number identifies how many cashout operations were
       // confirmed in the timeframe speficied in the request.
-      // Only present if conversion is supported 
-      cashoutCount?: number;
+      cashoutCount: number;
 
       // This amount corresponds to how much *external* currency was
       // paid by the libeufin-bank administrator to fulfill all the
       // confirmed cashouts related to the timeframe specified in the
       // request.
-      // Only present if conversion is supported 
-      cashoutExternalVolume?: Amount;
+      cashoutExternalVolume: Amount;
 
       // This number identifies how many payments were made by a
       // Taler exchange to a merchant bank account in the internal