feat: add rav collected event (#1056)

Signed-off-by: Tomás Migone <[email protected]>

Author: tmigone

packages/horizon/contracts/interfaces/ITAPCollector.sol

@@ -34,6 +34,26 @@ interface ITAPCollector is IPaymentsCollector {
         bytes signature;
     }
 
+    /**
+     * @notice Emitted when a RAV is collected
+     * @param payer The address of the payer
+     * @param dataService The address of the data service
+     * @param serviceProvider The address of the service provider
+     * @param timestampNs The timestamp of the RAV
+     * @param valueAggregate The total amount owed to the service provider
+     * @param metadata Arbitrary metadata
+     * @param signature The signature of the RAV
+     */
+    event RAVCollected(
+        address indexed payer,
+        address indexed dataService,
+        address indexed serviceProvider,
+        uint64 timestampNs,
+        uint128 valueAggregate,
+        bytes metadata,
+        bytes signature
+    );
+
     /**
      * Thrown when the caller is not the data service the RAV was issued to
      * @param caller The address of the caller

packages/horizon/contracts/payments/collectors/TAPCollector.sol

@@ -85,6 +85,15 @@ contract TAPCollector is EIP712, GraphDirectory, ITAPCollector {
         }
 
         emit PaymentCollected(paymentType, payer, receiver, tokensToCollect, dataService, tokensDataService);
+        emit RAVCollected(
+            payer,
+            dataService,
+            receiver,
+            signedRAV.rav.timestampNs,
+            signedRAV.rav.valueAggregate,
+            signedRAV.rav.metadata,
+            signedRAV.signature
+        );
         return tokensToCollect;
     }