[Storage] Move submitProof() to Proofs

contracts/Marketplace.sol

@@ -89,7 +89,7 @@ contract Marketplace is Collateral, Proofs {
     require(balanceOf(msg.sender) >= collateral, "Insufficient collateral");
 
     _expectProofs(slotId, requestId, request.ask.proofProbability);
-    _submitProof(slotId, proof);
+    submitProof(slotId, proof);
 
     slot.host = msg.sender;
     slot.requestId = requestId;

contracts/Proofs.sol

@@ -161,7 +161,7 @@ contract Proofs {
     return isRequired && pointer < downtime;
   }
 
-  function _submitProof(SlotId id, bytes calldata proof) internal {
+  function submitProof(SlotId id, bytes calldata proof) public {
     require(proof.length > 0, "Invalid proof"); // TODO: replace by actual check
     require(!received[id][currentPeriod()], "Proof already submitted");
     received[id][currentPeriod()] = true;

contracts/Storage.sol

@@ -35,10 +35,6 @@ contract Storage is Marketplace {
     minCollateralThreshold = _minCollateralThreshold;
   }
 
-  function submitProof(SlotId slotId, bytes calldata proof) public {
-    _submitProof(slotId, proof);
-  }
-
   function markProofAsMissing(SlotId slotId, uint256 period)
     public
     slotMustAcceptProofs(slotId)

contracts/TestProofs.sol

@@ -56,10 +56,6 @@ contract TestProofs is Proofs {
     return _getPointer(id);
   }
 
-  function submitProof(SlotId id, bytes calldata proof) public {
-    _submitProof(id, proof);
-  }
-
   function markProofAsMissing(SlotId id, uint256 _period) public {
     _markProofAsMissing(id, _period);
   }