diff --git a/codex/contracts/market.nim b/codex/contracts/market.nim
index e2c92751..0627b73a 100644
--- a/codex/contracts/market.nim
+++ b/codex/contracts/market.nim
@@ -42,19 +42,21 @@ method getRequest(market: OnChainMarket,
   else:
     return none StorageRequest
 
-method getHost(market: OnChainMarket,
-               id: array[32, byte]): Future[?Address] {.async.} =
-  let address = await market.contract.getHost(id)
-  if address != Address.default:
-    return some address
-  else:
-    return none Address
-
 method fulfillRequest(market: OnChainMarket,
                       requestId: array[32, byte],
                       proof: seq[byte]) {.async.} =
   await market.contract.fulfillRequest(requestId, proof)
 
+method getHost(market: OnChainMarket,
+               requestId: array[32, byte],
+               slotIndex: UInt256): Future[?Address] {.async.} =
+  let slotId = slotId(requestId, slotIndex)
+  let address = await market.contract.getHost(slotId)
+  if address != Address.default:
+    return some address
+  else:
+    return none Address
+
 method fillSlot(market: OnChainMarket,
                 requestId: array[32, byte],
                 slotIndex: UInt256,
diff --git a/codex/contracts/requests.nim b/codex/contracts/requests.nim
index 742f7109..8a39ea9b 100644
--- a/codex/contracts/requests.nim
+++ b/codex/contracts/requests.nim
@@ -120,9 +120,12 @@ func id*(request: StorageRequest): array[32, byte] =
   let encoding = AbiEncoder.encode((request, ))
   keccak256.digest(encoding).data
 
-func slotId*(request: StorageRequest, slot: UInt256): array[32, byte] =
-  let encoding = AbiEncoder.encode((request.id, slot))
+func slotId*(requestId: array[32, byte], slot: UInt256): array[32, byte] =
+  let encoding = AbiEncoder.encode((requestId, slot))
   keccak256.digest(encoding).data
 
+func slotId*(request: StorageRequest, slot: UInt256): array[32, byte] =
+  slotId(request.id, slot)
+
 func price*(request: StorageRequest): UInt256 =
   request.ask.slots.u256 * request.ask.duration * request.ask.reward
diff --git a/codex/market.nim b/codex/market.nim
index 1a3d5c91..6f152713 100644
--- a/codex/market.nim
+++ b/codex/market.nim
@@ -27,10 +27,6 @@ method getRequest*(market: Market,
                   Future[?StorageRequest] {.base, async.} =
   raiseAssert("not implemented")
 
-method getHost*(market: Market,
-                requestId: array[32, byte]): Future[?Address] {.base, async.} =
-  raiseAssert("not implemented")
-
 method fulfillRequest*(market: Market,
                        requestId: array[32, byte],
                        proof: seq[byte]) {.base, async.} =
diff --git a/tests/codex/helpers/mockmarket.nim b/tests/codex/helpers/mockmarket.nim
index 0ffce3ce..0c3ebe7f 100644
--- a/tests/codex/helpers/mockmarket.nim
+++ b/tests/codex/helpers/mockmarket.nim
@@ -58,13 +58,6 @@ method getRequest(market: MockMarket,
       return some request
   return none StorageRequest
 
-method getHost(market: MockMarket,
-               id: array[32, byte]): Future[?Address] {.async.} =
-  for fulfillment in market.fulfilled:
-    if fulfillment.requestId == id:
-      return some fulfillment.host
-  return none Address
-
 proc fulfillRequest*(market: MockMarket,
                      requestId: array[32, byte],
                      proof: seq[byte],
diff --git a/tests/contracts/testMarket.nim b/tests/contracts/testMarket.nim
index bcf884b4..752bda88 100644
--- a/tests/contracts/testMarket.nim
+++ b/tests/contracts/testMarket.nim
@@ -77,9 +77,9 @@ ethersuite "On-Chain Market":
   test "can retrieve host that filled slot":
     await token.approve(storage.address, request.price)
     discard await market.requestStorage(request)
-    check (await market.getHost(request.slotId(slotIndex))) == none Address
+    check (await market.getHost(request.id, slotIndex)) == none Address
     await market.fillSlot(request.id, slotIndex, proof)
-    check (await market.getHost(request.slotId(slotIndex))) == some accounts[0]
+    check (await market.getHost(request.id, slotIndex)) == some accounts[0]
 
   test "support fulfillment subscriptions":
     await token.approve(storage.address, request.price)