diff --git a/codex/contracts/market.nim b/codex/contracts/market.nim
index 4dadef03..92aa1b69 100644
--- a/codex/contracts/market.nim
+++ b/codex/contracts/market.nim
@@ -31,16 +31,10 @@ method requestStorage(market: OnChainMarket,
   await market.contract.requestStorage(request)
   return request
 
-method offerStorage(market: OnChainMarket,
-                    offer: StorageOffer):
-                   Future[StorageOffer] {.async.} =
-  var offer = offer
-  offer.host = await market.signer.getAddress()
-  await market.contract.offerStorage(offer)
-  return offer
-
-method selectOffer(market: OnChainMarket, offerId: array[32, byte]) {.async.} =
-  await market.contract.selectOffer(offerId)
+method fulfillRequest(market: OnChainMarket,
+                      requestId: array[32, byte],
+                      proof: seq[byte]) {.async.} =
+  await market.contract.fulfillRequest(requestId, proof)
 
 method subscribeRequests(market: OnChainMarket,
                          callback: OnRequest):
@@ -50,24 +44,14 @@ method subscribeRequests(market: OnChainMarket,
   let subscription = await market.contract.subscribe(StorageRequested, onEvent)
   return OnChainMarketSubscription(eventSubscription: subscription)
 
-method subscribeOffers(market: OnChainMarket,
-                       requestId: array[32, byte],
-                       callback: OnOffer):
-                      Future[MarketSubscription] {.async.} =
-  proc onEvent(event: StorageOffered) {.upraises:[].} =
+method subscribeFulfillment(market: OnChainMarket,
+                            requestId: array[32, byte],
+                            callback: OnFulfillment):
+                           Future[MarketSubscription] {.async.} =
+  proc onEvent(event: RequestFulfilled) {.upraises:[].} =
     if event.requestId == requestId:
-      callback(event.offer)
-  let subscription = await market.contract.subscribe(StorageOffered, onEvent)
-  return OnChainMarketSubscription(eventSubscription: subscription)
-
-method subscribeSelection(market: OnChainMarket,
-                          requestId: array[32, byte],
-                          callback: OnSelect):
-                         Future[MarketSubscription] {.async.} =
-  proc onSelect(event: OfferSelected) {.upraises: [].} =
-    if event.requestId == requestId:
-      callback(event.offerId)
-  let subscription = await market.contract.subscribe(OfferSelected, onSelect)
+      callback(event.requestId)
+  let subscription = await market.contract.subscribe(RequestFulfilled, onEvent)
   return OnChainMarketSubscription(eventSubscription: subscription)
 
 method unsubscribe*(subscription: OnChainMarketSubscription) {.async.} =
diff --git a/codex/market.nim b/codex/market.nim
index 9a36420e..9692f2cf 100644
--- a/codex/market.nim
+++ b/codex/market.nim
@@ -11,20 +11,16 @@ type
   Market* = ref object of RootObj
   Subscription* = ref object of RootObj
   OnRequest* = proc(id: array[32, byte], ask: StorageAsk) {.gcsafe, upraises:[].}
-  OnOffer* = proc(offer: StorageOffer) {.gcsafe, upraises:[].}
-  OnSelect* = proc(offerId: array[32, byte]) {.gcsafe, upraises: [].}
+  OnFulfillment* = proc(requestId: array[32, byte]) {.gcsafe, upraises: [].}
 
 method requestStorage*(market: Market,
                        request: StorageRequest):
                       Future[StorageRequest] {.base, async.} =
   raiseAssert("not implemented")
 
-method offerStorage*(market: Market,
-                     offer: StorageOffer):
-                    Future[StorageOffer] {.base, async.} =
-  raiseAssert("not implemented")
-
-method selectOffer*(market: Market, id: array[32, byte]) {.base, async.} =
+method fulfillRequest*(market: Market,
+                       requestId: array[32, byte],
+                       proof: seq[byte]) {.base, async.} =
   raiseAssert("not implemented")
 
 method subscribeRequests*(market: Market,
@@ -32,16 +28,10 @@ method subscribeRequests*(market: Market,
                          Future[Subscription] {.base, async.} =
   raiseAssert("not implemented")
 
-method subscribeOffers*(market: Market,
-                        requestId: array[32, byte],
-                        callback: OnOffer):
-                       Future[Subscription] {.base, async.} =
-  raiseAssert("not implemented")
-
-method subscribeSelection*(market: Market,
-                           requestId: array[32, byte],
-                           callback: OnSelect):
-                          Future[Subscription] {.base, async.} =
+method subscribeFulfillment*(market: Market,
+                             requestId: array[32, byte],
+                             callback: OnFulfillment):
+                            Future[Subscription] {.base, async.} =
   raiseAssert("not implemented")
 
 method unsubscribe*(subscription: Subscription) {.base, async, upraises:[].} =
diff --git a/tests/codex/helpers/mockmarket.nim b/tests/codex/helpers/mockmarket.nim
index 48b7f591..15f25a32 100644
--- a/tests/codex/helpers/mockmarket.nim
+++ b/tests/codex/helpers/mockmarket.nim
@@ -1,6 +1,4 @@
 import std/sequtils
-import std/heapqueue
-import pkg/questionable
 import pkg/codex/market
 
 export market
@@ -8,61 +6,37 @@ export market
 type
   MockMarket* = ref object of Market
     requested*: seq[StorageRequest]
-    offered*: seq[StorageOffer]
-    selected*: seq[array[32, byte]]
+    fulfilled*: seq[Fulfillment]
     subscriptions: Subscriptions
-    time: UInt256
-    waiting: HeapQueue[Expiry]
+  Fulfillment* = object
+    requestId: array[32, byte]
+    proof: seq[byte]
   Subscriptions = object
     onRequest: seq[RequestSubscription]
-    onOffer: seq[OfferSubscription]
-    onSelect: seq[SelectSubscription]
+    onFulfillment: seq[FulfillmentSubscription]
   RequestSubscription* = ref object of Subscription
     market: MockMarket
     callback: OnRequest
-  OfferSubscription* = ref object of Subscription
+  FulfillmentSubscription* = ref object of Subscription
     market: MockMarket
     requestId: array[32, byte]
-    callback: OnOffer
-  SelectSubscription* = ref object of Subscription
-    market: MockMarket
-    requestId: array[32, byte]
-    callback: OnSelect
-  Expiry = object
-    future: Future[void]
-    expiry: UInt256
+    callback: OnFulfillment
 
 method requestStorage*(market: MockMarket,
                        request: StorageRequest):
                       Future[StorageRequest] {.async.} =
   market.requested.add(request)
-  let subscriptions = market.subscriptions.onRequest
-  for subscription in subscriptions:
+  for subscription in market.subscriptions.onRequest:
     subscription.callback(request.id, request.ask)
   return request
 
-method offerStorage*(market: MockMarket,
-                     offer: StorageOffer):
-                    Future[StorageOffer] {.async.} =
-  market.offered.add(offer)
-  let subscriptions = market.subscriptions.onOffer
-  for subscription in subscriptions:
-    if subscription.requestId == offer.requestId:
-      subscription.callback(offer)
-  return offer
-
-proc findOffer(market: MockMarket, id: array[32, byte]): ?StorageOffer =
-  for offer in market.offered:
-    if offer.id == id:
-      return some offer
-
-method selectOffer*(market: MockMarket, id: array[32, byte]) {.async.} =
-  market.selected.add(id)
-  let subscriptions = market.subscriptions.onSelect
-  for subscription in subscriptions:
-    if offer =? market.findOffer(id):
-      if subscription.requestId == offer.requestId:
-        subscription.callback(id)
+method fulfillRequest*(market: MockMarket,
+                       requestId: array[32, byte],
+                       proof: seq[byte]) {.async.} =
+  market.fulfilled.add(Fulfillment(requestId: requestId, proof: proof))
+  for subscription in market.subscriptions.onFulfillment:
+    if subscription.requestId == requestId:
+      subscription.callback(requestId)
 
 method subscribeRequests*(market: MockMarket,
                           callback: OnRequest):
@@ -74,35 +48,20 @@ method subscribeRequests*(market: MockMarket,
   market.subscriptions.onRequest.add(subscription)
   return subscription
 
-method subscribeOffers*(market: MockMarket,
-                        requestId: array[32, byte],
-                        callback: OnOffer):
-                       Future[Subscription] {.async.} =
-  let subscription = OfferSubscription(
+method subscribeFulfillment*(market: MockMarket,
+                             requestId: array[32, byte],
+                             callback: OnFulfillment):
+                            Future[Subscription] {.async.} =
+  let subscription = FulfillmentSubscription(
     market: market,
     requestId: requestId,
     callback: callback
   )
-  market.subscriptions.onOffer.add(subscription)
-  return subscription
-
-method subscribeSelection*(market: MockMarket,
-                           requestId: array[32, byte],
-                           callback: OnSelect):
-                          Future[Subscription] {.async.} =
-  let subscription = SelectSubscription(
-    market: market,
-    requestId: requestId,
-    callback: callback
-  )
-  market.subscriptions.onSelect.add(subscription)
+  market.subscriptions.onFulfillment.add(subscription)
   return subscription
 
 method unsubscribe*(subscription: RequestSubscription) {.async.} =
   subscription.market.subscriptions.onRequest.keepItIf(it != subscription)
 
-method unsubscribe*(subscription: OfferSubscription) {.async.} =
-  subscription.market.subscriptions.onOffer.keepItIf(it != subscription)
-
-method unsubscribe*(subscription: SelectSubscription) {.async.} =
-  subscription.market.subscriptions.onSelect.keepItIf(it != subscription)
+method unsubscribe*(subscription: FulfillmentSubscription) {.async.} =
+  subscription.market.subscriptions.onFulfillment.keepItIf(it != subscription)
diff --git a/tests/contracts/testMarket.nim b/tests/contracts/testMarket.nim
index 4c3b7b52..7b92175d 100644
--- a/tests/contracts/testMarket.nim
+++ b/tests/contracts/testMarket.nim
@@ -6,6 +6,7 @@ import ./examples
 import ./time
 
 ethersuite "On-Chain Market":
+  let proof = seq[byte].example
 
   var market: OnChainMarket
   var storage: Storage
@@ -61,96 +62,40 @@ ethersuite "On-Chain Market":
     check receivedAsks == @[request.ask]
     await subscription.unsubscribe()
 
-  test "supports storage offers":
+  test "supports fulfilling of requests":
     await token.approve(storage.address, request.ask.maxPrice)
     discard await market.requestStorage(request)
-    check (await market.offerStorage(offer)) == offer
+    await market.fulfillRequest(request.id, proof)
 
-  test "sets host address when submitting storage offer":
+  test "support fulfillment subscriptions":
     await token.approve(storage.address, request.ask.maxPrice)
     discard await market.requestStorage(request)
-    var offerWithoutHost = offer
-    offerWithoutHost.host = Address.default
-    let submitted = await market.offerStorage(offerWithoutHost)
-    check submitted.host == accounts[0]
-
-  test "supports offer subscriptions":
-    await token.approve(storage.address, request.ask.maxPrice)
-    discard await market.requestStorage(request)
-    var received: seq[StorageOffer]
-    proc onOffer(offer: StorageOffer) =
-      received.add(offer)
-    let subscription = await market.subscribeOffers(request.id, onOffer)
-    discard await market.offerStorage(offer)
-    check received == @[offer]
+    var receivedIds: seq[array[32, byte]]
+    proc onFulfillment(id: array[32, byte]) =
+      receivedIds.add(id)
+    let subscription = await market.subscribeFulfillment(request.id, onFulfillment)
+    await market.fulfillRequest(request.id, proof)
+    check receivedIds == @[request.id]
     await subscription.unsubscribe()
 
-  test "subscribes only to offers for a certain request":
+  test "subscribes only to fulfillmentof a certain request":
     var otherRequest = StorageRequest.example
-    var otherOffer = StorageOffer.example
     otherRequest.client = accounts[0]
-    otherOffer.host = accounts[0]
-    otherOffer.requestId = otherRequest.id
-    otherOffer.price = otherrequest.ask.maxPrice
 
     await token.approve(storage.address, request.ask.maxPrice)
     discard await market.requestStorage(request)
     await token.approve(storage.address, otherrequest.ask.maxPrice)
     discard await market.requestStorage(otherRequest)
 
-    var submitted: seq[StorageOffer]
-    proc onOffer(offer: StorageOffer) =
-      submitted.add(offer)
+    var receivedIds: seq[array[32, byte]]
+    proc onFulfillment(id: array[32, byte]) =
+      receivedIds.add(id)
 
-    let subscription = await market.subscribeOffers(request.id, onOffer)
+    let subscription = await market.subscribeFulfillment(request.id, onFulfillment)
 
-    discard await market.offerStorage(offer)
-    discard await market.offerStorage(otherOffer)
+    await market.fulfillRequest(request.id, proof)
+    await market.fulfillRequest(otherRequest.id, proof)
 
-    check submitted == @[offer]
-
-    await subscription.unsubscribe()
-
-  test "supports selection of an offer":
-    await token.approve(storage.address, request.ask.maxPrice)
-    discard await market.requestStorage(request)
-    discard await market.offerStorage(offer)
-
-    var selected: seq[array[32, byte]]
-    proc onSelect(offerId: array[32, byte]) =
-      selected.add(offerId)
-    let subscription = await market.subscribeSelection(request.id, onSelect)
-
-    await market.selectOffer(offer.id)
-
-    check selected == @[offer.id]
-
-    await subscription.unsubscribe()
-
-  test "subscribes only to selection for a certain request":
-    var otherRequest = StorageRequest.example
-    var otherOffer = StorageOffer.example
-    otherRequest.client = accounts[0]
-    otherOffer.host = accounts[0]
-    otherOffer.requestId = otherRequest.id
-    otherOffer.price = otherrequest.ask.maxPrice
-
-    await token.approve(storage.address, request.ask.maxPrice)
-    discard await market.requestStorage(request)
-    discard await market.offerStorage(offer)
-    await token.approve(storage.address, otherrequest.ask.maxPrice)
-    discard await market.requestStorage(otherRequest)
-    discard await market.offerStorage(otherOffer)
-
-    var selected: seq[array[32, byte]]
-    proc onSelect(offerId: array[32, byte]) =
-      selected.add(offerId)
-
-    let subscription = await market.subscribeSelection(request.id, onSelect)
-
-    await market.selectOffer(offer.id)
-    await market.selectOffer(otherOffer.id)
-
-    check selected == @[offer.id]
+    check receivedIds == @[request.id]
 
     await subscription.unsubscribe()