diff --git a/common/contract.ts b/common/contract.ts
index ac4848ec..e9b768ea 100644
--- a/common/contract.ts
+++ b/common/contract.ts
@@ -46,7 +46,6 @@ export type Contract = FullContract<
 export type BinaryContract = FullContract<DPM | CPMM, Binary>
 export type FreeResponseContract = FullContract<DPM | CPMM, FreeResponse>
 export type NumericContract = FullContract<DPM, Numeric>
-export type AnyOutcome = Binary | Multi | FreeResponse | Numeric
 
 export type DPM = {
   mechanism: 'dpm-2'
diff --git a/common/payouts-dpm.ts b/common/payouts-dpm.ts
index a3208ab3..300a906f 100644
--- a/common/payouts-dpm.ts
+++ b/common/payouts-dpm.ts
@@ -2,12 +2,12 @@ import { sum, groupBy, sumBy, mapValues } from 'lodash'
 
 import { Bet, NumericBet } from './bet'
 import { deductDpmFees, getDpmProbability } from './calculate-dpm'
-import { DPM, FreeResponse, FullContract, Multi, AnyOutcome } from './contract'
+import { DPM, FreeResponse, FullContract, Multi } from './contract'
 import { DPM_CREATOR_FEE, DPM_FEES, DPM_PLATFORM_FEE } from './fees'
 import { addObjects } from './util/object'
 
 export const getDpmCancelPayouts = (
-  contract: FullContract<DPM, AnyOutcome>,
+  contract: FullContract<DPM, any>,
   bets: Bet[]
 ) => {
   const { pool } = contract
@@ -31,7 +31,7 @@ export const getDpmCancelPayouts = (
 
 export const getDpmStandardPayouts = (
   outcome: string,
-  contract: FullContract<DPM, AnyOutcome>,
+  contract: FullContract<DPM, any>,
   bets: Bet[]
 ) => {
   const winningBets = bets.filter((bet) => bet.outcome === outcome)
@@ -78,7 +78,7 @@ export const getDpmStandardPayouts = (
 
 export const getNumericDpmPayouts = (
   outcome: string,
-  contract: FullContract<DPM, AnyOutcome>,
+  contract: FullContract<DPM, any>,
   bets: NumericBet[]
 ) => {
   const totalShares = sumBy(bets, (bet) => bet.allOutcomeShares[outcome] ?? 0)
@@ -129,7 +129,7 @@ export const getNumericDpmPayouts = (
 }
 
 export const getDpmMktPayouts = (
-  contract: FullContract<DPM, AnyOutcome>,
+  contract: FullContract<DPM, any>,
   bets: Bet[],
   resolutionProbability?: number
 ) => {
diff --git a/common/payouts.ts b/common/payouts.ts
index 54c850f0..68fb8694 100644
--- a/common/payouts.ts
+++ b/common/payouts.ts
@@ -9,7 +9,6 @@ import {
   FreeResponse,
   FullContract,
   Multi,
-  AnyOutcome,
 } from './contract'
 import { Fees } from './fees'
 import { LiquidityProvision } from './liquidity-provision'
@@ -73,17 +72,15 @@ export const getPayouts = (
       liquidities,
       resolutionProbability
     )
-  } else if (contract.mechanism === 'dpm-2') {
-    return getDpmPayouts(
-      outcome,
-      resolutions,
-      contract,
-      bets,
-      resolutionProbability
-    )
-  } else {
-    throw new Error('Unknown contract mechanism.')
   }
+
+  return getDpmPayouts(
+    outcome,
+    resolutions,
+    contract,
+    bets,
+    resolutionProbability
+  )
 }
 
 export const getFixedPayouts = (
@@ -115,7 +112,7 @@ export const getDpmPayouts = (
   resolutions: {
     [outcome: string]: number
   },
-  contract: FullContract<DPM, AnyOutcome>,
+  contract: Contract,
   bets: Bet[],
   resolutionProbability?: number
 ): PayoutInfo => {