From c835ac1cc4ed45496706acbb6b054440a71dc857 Mon Sep 17 00:00:00 2001
From: Mark Spanbroek <mark@spanbroek.net>
Date: Mon, 21 Feb 2022 14:00:59 +0100
Subject: [PATCH] Emit event when offer is selected

---
 contracts/Marketplace.sol | 3 +++
 test/Marketplace.test.js  | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/contracts/Marketplace.sol b/contracts/Marketplace.sol
index f8348ac..4f00c1c 100644
--- a/contracts/Marketplace.sol
+++ b/contracts/Marketplace.sol
@@ -81,6 +81,8 @@ contract Marketplace is Collateral {
     funds.sent += difference;
     funds.balance -= difference;
     token.transfer(request.client, difference);
+
+    emit OfferSelected(id);
   }
 
   struct Request {
@@ -108,6 +110,7 @@ contract Marketplace is Collateral {
 
   event StorageRequested(bytes32 id, Request request);
   event StorageOffered(bytes32 id, Offer offer);
+  event OfferSelected(bytes32 id);
 
   modifier marketplaceInvariant() {
     MarketplaceFunds memory oldFunds = funds;
diff --git a/test/Marketplace.test.js b/test/Marketplace.test.js
index a95c52c..ed5a41b 100644
--- a/test/Marketplace.test.js
+++ b/test/Marketplace.test.js
@@ -163,6 +163,12 @@ describe("Marketplace", function () {
       switchAccount(client)
     })
 
+    it("emits event when offer is selected", async function () {
+      await expect(marketplace.selectOffer(offerId(offer)))
+        .to.emit(marketplace, "OfferSelected")
+        .withArgs(offerId(offer))
+    })
+
     it("returns price difference to client", async function () {
       let difference = request.maxPrice - offer.price
       let before = await token.balanceOf(client.address)