Append answers to contract field 'answers'

common/contract.ts

@@ -1,3 +1,5 @@
+import { Answer } from './answer'
+
 export type Contract = {
   id: string
   slug: string // auto-generated; must be unique
@@ -15,6 +17,7 @@ export type Contract = {
 
   outcomeType: 'BINARY' | 'MULTI' | 'FREE_RESPONSE'
   multiOutcomes?: string[] // Used for outcomeType 'MULTI'.
+  answers?: Answer[] // Used for outcomeType 'FREE_RESPONSE'.
 
   mechanism: 'dpm-2'
   phantomShares?: { [outcome: string]: number }

common/new-contract.ts

@@ -72,6 +72,7 @@ const getFreeAnswerProps = (ante: number) => {
     pool: { '0': ante },
     totalShares: { '0': ante },
     totalBets: { '0': ante },
+    answers: [],
   }
 }
 

functions/src/create-answer.ts

@@ -99,6 +99,7 @@ export const createAnswer = functions.runWith({ minInstances: 1 }).https.onCall(
         pool: newPool,
         totalShares: newTotalShares,
         totalBets: newTotalBets,
+        answers: [...(contract.answers ?? []), answer],
       })
       transaction.update(userDoc, { balance: newBalance })