Fix event origin address

src/mapping-instance.ts

@@ -30,7 +30,7 @@ export function handleDeposit(event: Deposit): void {
   entity.amount = result[1];
   entity.currency = result[0];
 
-  entity.from = event.address;
+  entity.from = event.transaction.from;
   entity.index = event.params.leafIndex;
   entity.blockNumber = event.block.number;
   entity.timestamp = event.block.timestamp;