(hub): remove event FlowEdgeEffected and simplify StreamCompleted eve…

…nt; again for compile size

src/hub/Hub.sol

@@ -132,14 +132,8 @@ contract Hub is Circles, TypeDefinitions, IHubErrors {
 
     event Stopped(address indexed avatar);
 
-    event FlowEdgeEffected(uint16 flowEdgeId, uint16 streamSinkId);
     event StreamCompleted(
-        address indexed operator,
-        address indexed from,
-        address indexed to,
-        uint256[] ids,
-        uint256[] amounts,
-        uint16 streamSinkId
+        address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] amounts
     );
 
     // Modifiers
@@ -840,10 +834,6 @@ contract Hub is Circles, TypeDefinitions, IHubErrors {
                     );
                 }
 
-                // emit the flow edge's index and the associated stream sink id
-                // so that terminal flow edges can be matched with streams
-                emit FlowEdgeEffected(index / 3, _flow[i].streamSinkId);
-
                 index = index + 3;
             }
 
@@ -898,7 +888,7 @@ contract Hub is Circles, TypeDefinitions, IHubErrors {
 
             // emit the stream completed event which expresses the effective "ERC1155:BatchTransfer" event
             // for the stream as part of a batch of path transfers.
-            emit StreamCompleted(msg.sender, _flowVertices[_streams[i].sourceCoordinate], receiver, ids, amounts, i + 1);
+            emit StreamCompleted(msg.sender, _flowVertices[_streams[i].sourceCoordinate], receiver, ids, amounts);
         }
 
         return nettedFlow;