[sales] Use correct slot price

codex/contracts/requests.nim

@@ -127,5 +127,11 @@ func slotId*(requestId: array[32, byte], slot: UInt256): array[32, byte] =
 func slotId*(request: StorageRequest, slot: UInt256): array[32, byte] =
   slotId(request.id, slot)
 
+func pricePerSlot*(ask: StorageAsk): UInt256 =
+  ask.duration * ask.reward
+
+func price*(ask: StorageAsk): UInt256 =
+  ask.slots.u256 * ask.pricePerSlot
+
 func price*(request: StorageRequest): UInt256 =
-  request.ask.slots.u256 * request.ask.duration * request.ask.reward
+  request.ask.price

codex/sales.nim

@@ -97,7 +97,7 @@ func findAvailability(sales: Sales, ask: StorageAsk): ?Availability =
   for availability in sales.available:
     if ask.size <= availability.size and
        ask.duration <= availability.duration and
-       ask.reward >= availability.minPrice:
+       ask.pricePerSlot >= availability.minPrice:
       return some availability
 
 proc finish(agent: SalesAgent, success: bool) =

tests/codex/testsales.nim

@@ -10,13 +10,13 @@ suite "Sales":
   let availability = Availability.init(
     size=100.u256,
     duration=60.u256,
-    minPrice=42.u256
+    minPrice=600.u256
   )
   var request = StorageRequest(
     ask: StorageAsk(
       duration: 60.u256,
       size: 100.u256,
-      reward:42.u256,
+      reward: 10.u256,
       slots: 4
     ),
     content: StorageContent(
@@ -77,6 +77,13 @@ suite "Sales":
     discard await market.requestStorage(tooBig)
     check sales.available == @[availability]
 
+  test "ignores request when reward is too low":
+    sales.add(availability)
+    var tooCheap = request
+    tooCheap.ask.reward = request.ask.reward - 1
+    discard await market.requestStorage(tooCheap)
+    check sales.available == @[availability]
+
   test "retrieves and stores data locally":
     var storingCid: string
     var storingAvailability: Availability