diff --git a/Sources/src/main/kotlin/allin/data/postgres/PostgresBetDataSource.kt b/Sources/src/main/kotlin/allin/data/postgres/PostgresBetDataSource.kt
index 103ace9..3ff7ffc 100644
--- a/Sources/src/main/kotlin/allin/data/postgres/PostgresBetDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/postgres/PostgresBetDataSource.kt
@@ -200,12 +200,27 @@ class PostgresBetDataSource(private val database: Database) : BetDataSource {
             }
         )
 
-        if (bet.type == BetType.CUSTOM) {
-            bet.response.forEach { selected ->
+        val responses = if (bet.type == BetType.BINARY) {
+            listOf(YES_VALUE, NO_VALUE)
+        } else {
+            bet.response
+        }
+
+        responses.forEach { response ->
+            database.betAnswerInfos.add(
+                BetAnswerInfoEntity {
+                    this.betId = bet.id
+                    this.response = response
+                    this.totalStakes = 0
+                    this.odds = 1f
+                }
+            )
+
+            if (bet.type == BetType.CUSTOM) {
                 database.responses.add(
                     ResponseEntity {
                         this.betId = bet.id
-                        this.response = selected
+                        this.response = response
                     }
                 )
             }
diff --git a/Sources/src/main/kotlin/allin/data/postgres/PostgresParticipationDataSource.kt b/Sources/src/main/kotlin/allin/data/postgres/PostgresParticipationDataSource.kt
index c6b3b96..6a56aa3 100644
--- a/Sources/src/main/kotlin/allin/data/postgres/PostgresParticipationDataSource.kt
+++ b/Sources/src/main/kotlin/allin/data/postgres/PostgresParticipationDataSource.kt
@@ -34,8 +34,9 @@ class PostgresParticipationDataSource(private val database: Database) : Particip
             if (it.response == participation.answer) {
                 it.totalStakes += participation.stake
             }
-            val probability = it.totalStakes / betInfo.totalStakes.toFloat()
-            it.odds = 1 / probability
+
+            val probability = (it.totalStakes / betInfo.totalStakes.toFloat())
+            it.odds = if (probability == 0f) 1f else 1 / probability
             it.flushChanges()
         }
     }
diff --git a/Sources/src/main/kotlin/allin/data/postgres/entities/ParticipationEntity.kt b/Sources/src/main/kotlin/allin/data/postgres/entities/ParticipationEntity.kt
index 222df52..1397233 100644
--- a/Sources/src/main/kotlin/allin/data/postgres/entities/ParticipationEntity.kt
+++ b/Sources/src/main/kotlin/allin/data/postgres/entities/ParticipationEntity.kt
@@ -28,7 +28,7 @@ interface ParticipationEntity : Entity<ParticipationEntity> {
 }
 
 object ParticipationsEntity : Table<ParticipationEntity>("participation") {
-    val id = varchar("id").primaryKey()
+    val id = varchar("id").primaryKey().bindTo { it.id }
     val betId = varchar("bet").references(BetsEntity) { it.bet }
     val username = varchar("username").bindTo { it.username }
     val answer = varchar("answer").bindTo { it.answer }
diff --git a/Sources/src/main/kotlin/allin/routing/betRouter.kt b/Sources/src/main/kotlin/allin/routing/betRouter.kt
index 0170980..3fea20c 100644
--- a/Sources/src/main/kotlin/allin/routing/betRouter.kt
+++ b/Sources/src/main/kotlin/allin/routing/betRouter.kt
@@ -1,6 +1,7 @@
 package allin.routing
 
 import allin.dataSource
+import allin.dto.UserDTO
 import allin.ext.hasToken
 import allin.ext.verifyUserFromToken
 import allin.model.*
@@ -21,6 +22,7 @@ val tokenManagerBet = AppConfig.tokenManager
 fun Application.betRouter() {
     val userDataSource = this.dataSource.userDataSource
     val betDataSource = this.dataSource.betDataSource
+    val participationDataSource = this.dataSource.participationDataSource
     val logManager = AppConfig.logManager
 
     routing {
@@ -352,11 +354,38 @@ fun Application.betRouter() {
                             logManager.log("Routing", "UNAUTHORIZED /bets/confirm/{id}")
                             call.respond(HttpStatusCode.Unauthorized)
                         }
-
                     }
                 }
             }
+            post("/bets/users", {
+                description = "gets all userDTO of a bet"
+                request {
+                    headerParameter<JWTPrincipal>("JWT token of the logged user")
+                    pathParameter<String>("Id of the desired bet")
+                    body<List<UserDTO>> {
+                        description = "UserDTO of the bet"
+                    }
+                }
+                response {
+                    HttpStatusCode.OK to {
+                        description = "The final answer has been set"
+                    }
+                    HttpStatusCode.Unauthorized to {
+                        description = "The user is not the creator of the bet"
+                    }
+                }
+            }) {
+                logManager.log("Routing","POST /bets/users")
+                hasToken { principal ->
+                    verifyUserFromToken(userDataSource, principal) { user, _ ->
+                        val id = call.receive<Map<String, String>>()["id"] ?: ""
+                        val participations = participationDataSource.getParticipationFromBetId(id)
+                        val users = participations.map { userDataSource.getUserByUsername(it.username).first }.toSet().take(4).toList()
+                        call.respond(users)
+                    }
+                }
         }
 
     }
+}
 }
\ No newline at end of file