diff --git a/ProjectPlugins/CodexContractsPlugin/CodexContractsAccess.cs b/ProjectPlugins/CodexContractsPlugin/CodexContractsAccess.cs
index 132451e7..0c952b1d 100644
--- a/ProjectPlugins/CodexContractsPlugin/CodexContractsAccess.cs
+++ b/ProjectPlugins/CodexContractsPlugin/CodexContractsAccess.cs
@@ -32,6 +32,7 @@ namespace CodexContractsPlugin
         TimeRange GetPeriodTimeRange(ulong periodNumber);
         void WaitUntilNextPeriod();
         bool IsProofRequired(byte[] requestId, decimal slotIndex);
+        bool WillProofBeRequired(byte[] requestId, decimal slotIndex);
         byte[] GetSlotId(byte[] requestId, decimal slotIndex);
 
         ICodexContracts WithDifferentGeth(IGethNode node);
@@ -172,6 +173,12 @@ namespace CodexContractsPlugin
             return IsProofRequired(slotId);
         }
 
+        public bool WillProofBeRequired(byte[] requestId, decimal slotIndex)
+        {
+            var slotId = GetSlotId(requestId, slotIndex);
+            return WillProofBeRequired(slotId);
+        }
+
         public ICodexContracts WithDifferentGeth(IGethNode node)
         {
             return new CodexContractsAccess(log, node, Deployment);
@@ -198,6 +205,16 @@ namespace CodexContractsPlugin
             return result.ReturnValue1;
         }
 
+        private bool WillProofBeRequired(byte[] slotId)
+        {
+            var func = new WillProofBeRequiredFunction
+            {
+                Id = slotId
+            };
+            var result = gethNode.Call<WillProofBeRequiredFunction, WillProofBeRequiredOutputDTO>(Deployment.MarketplaceAddress, func);
+            return result.ReturnValue1;
+        }
+
         private ContractInteractions StartInteraction()
         {
             return new ContractInteractions(log, gethNode);
diff --git a/Tests/CodexReleaseTests/MarketTests/IsProofRequiredTest.cs b/Tests/CodexReleaseTests/MarketTests/IsProofRequiredTest.cs
index 698b4afa..95f55fbd 100644
--- a/Tests/CodexReleaseTests/MarketTests/IsProofRequiredTest.cs
+++ b/Tests/CodexReleaseTests/MarketTests/IsProofRequiredTest.cs
@@ -51,16 +51,20 @@ namespace CodexReleaseTests.MarketTests
             {
                 Thread.Sleep(TimeSpan.FromSeconds(1));
                 var requiredSlotIndices = new List<int>();
+                var willRequireSlotIndices = new List<int>();
                 for (var i = 0; i < numSlots; i++)
                 {
                     if (GetContracts().IsProofRequired(requestId, i)) requiredSlotIndices.Add(i);
+                    if (GetContracts().WillProofBeRequired(requestId, i)) willRequireSlotIndices.Add(i);
                 }
 
                 var periodNumber = GetContracts().GetPeriodNumber(DateTime.UtcNow);
                 var blockNumber = GetGeth().GetSyncedBlockNumber();
                 Log($"[{blockNumber?.ToString().PadLeft(4, '0')}]" +
-                    $"{periodNumber.ToString().PadLeft(12, '0')} => " +
-                    $"{string.Join(",", requiredSlotIndices.Select(i => i.ToString()))}");
+                    $"{periodNumber.ToString().PadLeft(12, '0')} => Required now: " +
+                    $"[{string.Join(",", requiredSlotIndices.Select(i => i.ToString()))}] " +
+                    $"Will be required: " +
+                    $"[{string.Join(",", willRequireSlotIndices.Select(i => i.ToString()))}]");
 
                 //var num = currentPeriod.PeriodNumber;
                 //if (!map.ContainsKey(num))