Show investment in market resolve email

functions/src/email-templates/market-resolved.html

@@ -437,6 +437,28 @@
                                   margin: 0;
                                 "
                               />
+                              Your investment was
+                              <span style="font-weight: bold"
+                                >M$ {{investment}}</span
+                              >.
+                              <br
+                                style="
+                                  font-family: 'Helvetica Neue', Helvetica,
+                                    Arial, sans-serif;
+                                  box-sizing: border-box;
+                                  font-size: 16px;
+                                  margin: 0;
+                                "
+                              />
+                              <br
+                                style="
+                                  font-family: 'Helvetica Neue', Helvetica,
+                                    Arial, sans-serif;
+                                  box-sizing: border-box;
+                                  font-size: 16px;
+                                  margin: 0;
+                                "
+                              />
                               Your payout is
                               <span style="font-weight: bold"
                                 >M$ {{payout}}</span

functions/src/emails.ts

@@ -16,6 +16,7 @@ type market_resolved_template = {
   creatorName: string
   question: string
   outcome: string
+  investment: string
   payout: string
   url: string
 }
@@ -39,6 +40,7 @@ const toDisplayResolution = (
 
 export const sendMarketResolutionEmail = async (
   userId: string,
+  investment: number,
   payout: number,
   creator: User,
   contract: Contract,
@@ -69,6 +71,7 @@ export const sendMarketResolutionEmail = async (
     creatorName: creator.name,
     question: contract.question,
     outcome,
+    investment: `${Math.round(investment)}`,
     payout: `${Math.round(payout)}`,
     url: `https://manifold.markets/${creator.username}/${contract.slug}`,
   }

functions/src/resolve-market.ts

@@ -134,14 +134,24 @@ const sendResolutionEmails = async (
     _.uniq(openBets.map(({ userId }) => userId)),
     Object.keys(userPayouts)
   )
+  const investedByUser = _.mapValues(
+    _.groupBy(openBets, (bet) => bet.userId),
+    (bets) => _.sumBy(bets, (bet) => bet.amount)
+  )
   const emailPayouts = [
     ...Object.entries(userPayouts),
     ...nonWinners.map((userId) => [userId, 0] as const),
-  ]
+  ].map(([userId, payout]) => ({
+    userId,
+    investment: investedByUser[userId],
+    payout,
+  }))
+
   await Promise.all(
-    emailPayouts.map(([userId, payout]) =>
+    emailPayouts.map(({ userId, investment, payout }) =>
       sendMarketResolutionEmail(
         userId,
+        investment,
         payout,
         creator,
         contract,