feat: enhance isDatasetCompatibleWithDeal function to return with a reason

contracts/facets/IexecPoco1Facet.sol

@@ -68,35 +68,36 @@ contract IexecPoco1Facet is IexecPoco1, FacetBase, IexecEscrow, SignatureVerifie
      *
      * @param datasetOrder The dataset order to verify
      * @param dealid The deal ID to check against
-     * @return true if the dataset order is compatible with the deal, false otherwise
+     * @return result true if the dataset order is compatible with the deal, false otherwise
+     * @return reason the specific reason why the compatibility check failed, empty string if successful
      */
     function isDatasetCompatibleWithDeal(
         IexecLibOrders_v5.DatasetOrder calldata datasetOrder,
         bytes32 dealid
-    ) external view override returns (bool) {
+    ) external view override returns (bool result, string memory reason) {
         PocoStorageLib.PocoStorage storage $ = PocoStorageLib.getPocoStorage();
         // Check if deal exists
         IexecLibCore_v5.Deal storage deal = $.m_deals[dealid];
         if (deal.requester == address(0)) {
-            return false;
+            return (false, "Deal does not exist");
         }
         // The specified deal should not have a dataset.
         if (deal.dataset.pointer != address(0)) {
-            return false;
+            return (false, "Deal already has a dataset");
         }
         // Check dataset order owner signature (including presign and EIP1271)
         bytes32 datasetOrderHash = _toTypedDataHash(datasetOrder.hash());
         address datasetOwner = IERC5313(datasetOrder.dataset).owner();
         if (!_verifySignatureOrPresignature(datasetOwner, datasetOrderHash, datasetOrder.sign)) {
-            return false;
+            return (false, "Invalid dataset order signature");
         }
         // Check if dataset order is not fully consumed
         if ($.m_consumed[datasetOrderHash] >= datasetOrder.volume) {
-            return false;
+            return (false, "Dataset order is fully consumed");
         }
         // Check if deal app is allowed by dataset order apprestrict (including whitelist)
         if (!_isAccountAuthorizedByRestriction(datasetOrder.apprestrict, deal.app.pointer)) {
-            return false;
+            return (false, "App restriction not satisfied");
         }
         // Check if deal workerpool is allowed by dataset order workerpoolrestrict (including whitelist)
         if (
@@ -105,17 +106,17 @@ contract IexecPoco1Facet is IexecPoco1, FacetBase, IexecEscrow, SignatureVerifie
                 deal.workerpool.pointer
             )
         ) {
-            return false;
+            return (false, "Workerpool restriction not satisfied");
         }
         // Check if deal requester is allowed by dataset order requesterrestrict (including whitelist)
         if (!_isAccountAuthorizedByRestriction(datasetOrder.requesterrestrict, deal.requester)) {
-            return false;
+            return (false, "Requester restriction not satisfied");
         }
         // Check if deal tag fulfills all the tag bits of the dataset order
         if ((deal.tag & datasetOrder.tag) != datasetOrder.tag) {
-            return false;
+            return (false, "Tag compatibility not satisfied");
         }
-        return true;
+        return (true, "");
     }
 
     /***************************************************************************

contracts/interfaces/IexecPoco1.sol

@@ -50,5 +50,5 @@ interface IexecPoco1 {
     function isDatasetCompatibleWithDeal(
         IexecLibOrders_v5.DatasetOrder calldata datasetOrder,
         bytes32 dealid
-    ) external view returns (bool);
+    ) external view returns (bool result, string memory reason);
 }

contracts/interfaces/IexecPoco1.v8.sol

@@ -44,5 +44,5 @@ interface IexecPoco1 {
     function isDatasetCompatibleWithDeal(
         IexecLibOrders_v5.DatasetOrder calldata datasetOrder,
         bytes32 dealid
-    ) external view returns (bool);
+    ) external view returns (bool result, string memory reason);
 }

docs/solidity/index.md

@@ -74,7 +74,7 @@ function verifyPresignatureOrSignature(address _identity, bytes32 _hash, bytes _
 ### isDatasetCompatibleWithDeal
 
 ```solidity
-function isDatasetCompatibleWithDeal(struct IexecLibOrders_v5.DatasetOrder datasetOrder, bytes32 dealid) external view returns (bool)
+function isDatasetCompatibleWithDeal(struct IexecLibOrders_v5.DatasetOrder datasetOrder, bytes32 dealid) external view returns (bool result, string reason)
 ```
 
 Public view function to check if a dataset order is compatible with a deal.
@@ -94,7 +94,8 @@ This function should not be used in matchOrders as it does not check the same re
 
 | Name | Type | Description |
 | ---- | ---- | ----------- |
-| [0] | bool | true if the dataset order is compatible with the deal, false otherwise |
+| result | bool | true if the dataset order is compatible with the deal, false otherwise |
+| reason | string | the specific reason why the compatibility check failed, empty string if successful |
 
 ### matchOrders
 
@@ -456,6 +457,115 @@ function groupmember_purpose() external pure returns (uint256)
 function eip712domain_separator() external view returns (bytes32)
 ```
 
+## IexecPocoBoostAccessorsFacet
+
+Access to PoCo Boost tasks must be done with PoCo Classic `IexecAccessors`.
+
+### viewDealBoost
+
+```solidity
+function viewDealBoost(bytes32 id) external view returns (struct IexecLibCore_v5.DealBoost deal)
+```
+
+Get a deal created by PoCo Boost facet.
+
+#### Parameters
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| id | bytes32 | The ID of the deal. |
+
+## IexecPocoBoostFacet
+
+Works for deals with requested trust = 0.
+
+### matchOrdersBoost
+
+```solidity
+function matchOrdersBoost(struct IexecLibOrders_v5.AppOrder appOrder, struct IexecLibOrders_v5.DatasetOrder datasetOrder, struct IexecLibOrders_v5.WorkerpoolOrder workerpoolOrder, struct IexecLibOrders_v5.RequestOrder requestOrder) external returns (bytes32)
+```
+
+This boost match orders is only compatible with trust <= 1.
+The requester gets debited.
+
+#### Parameters
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| appOrder | struct IexecLibOrders_v5.AppOrder | The order signed by the application developer. |
+| datasetOrder | struct IexecLibOrders_v5.DatasetOrder | The order signed by the dataset provider. |
+| workerpoolOrder | struct IexecLibOrders_v5.WorkerpoolOrder | The order signed by the workerpool manager. |
+| requestOrder | struct IexecLibOrders_v5.RequestOrder | The order signed by the requester. |
+
+#### Return Values
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| [0] | bytes32 | The ID of the deal. |
+
+### sponsorMatchOrdersBoost
+
+```solidity
+function sponsorMatchOrdersBoost(struct IexecLibOrders_v5.AppOrder appOrder, struct IexecLibOrders_v5.DatasetOrder datasetOrder, struct IexecLibOrders_v5.WorkerpoolOrder workerpoolOrder, struct IexecLibOrders_v5.RequestOrder requestOrder) external returns (bytes32)
+```
+
+Sponsor match orders boost for a requester.
+Unlike the standard `matchOrdersBoost(..)` hook where the requester pays for
+the deal, this current hook makes it possible for any `msg.sender` to pay for
+a third party requester.
+
+Be aware that anyone seeing a valid request order on the network
+(via an off-chain public marketplace, via a `sponsorMatchOrdersBoost(..)`
+pending transaction in the mempool or by any other means) might decide
+to call the standard `matchOrdersBoost(..)` hook which will result in the
+requester being debited instead. Therefore, such a front run would result
+in a loss of some of the requester funds deposited in the iExec account
+(a loss value equivalent to the price of the deal).
+
+#### Parameters
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| appOrder | struct IexecLibOrders_v5.AppOrder | The app order. |
+| datasetOrder | struct IexecLibOrders_v5.DatasetOrder | The dataset order. |
+| workerpoolOrder | struct IexecLibOrders_v5.WorkerpoolOrder | The workerpool order. |
+| requestOrder | struct IexecLibOrders_v5.RequestOrder | The requester order. |
+
+### pushResultBoost
+
+```solidity
+function pushResultBoost(bytes32 dealId, uint256 index, bytes results, bytes resultsCallback, bytes authorizationSign, address enclaveChallenge, bytes enclaveSign) external
+```
+
+Accept results of a task computed by a worker during Boost workflow.
+
+#### Parameters
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| dealId | bytes32 | The id of the target deal. |
+| index | uint256 | The index of the target task of the deal. |
+| results | bytes | The results of the task computed by the worker. |
+| resultsCallback | bytes | The results of the task computed by the worker that will be forwarded as call data to the callback address set by the requester. |
+| authorizationSign | bytes | The authorization signed by the scheduler. authorizing the worker to push a result. |
+| enclaveChallenge | address | The enclave address which can produce enclave signature. |
+| enclaveSign | bytes | The signature generated from the enclave. |
+
+### claimBoost
+
+```solidity
+function claimBoost(bytes32 dealId, uint256 index) external
+```
+
+Claim task to get a refund if task is not completed after deadline.
+
+#### Parameters
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| dealId | bytes32 | The ID of the deal. |
+| index | uint256 | The index of the task. |
+
 ## IexecLibCore_v5
 
 ### Account
@@ -1651,112 +1761,3 @@ function manageWorkerpoolOrder(struct IexecLibOrders_v5.WorkerpoolOrderOperation
 function manageRequestOrder(struct IexecLibOrders_v5.RequestOrderOperation _requestorderoperation) external
 ```
 
-## IexecPocoBoostAccessorsFacet
-
-Access to PoCo Boost tasks must be done with PoCo Classic `IexecAccessors`.
-
-### viewDealBoost
-
-```solidity
-function viewDealBoost(bytes32 id) external view returns (struct IexecLibCore_v5.DealBoost deal)
-```
-
-Get a deal created by PoCo Boost facet.
-
-#### Parameters
-
-| Name | Type | Description |
-| ---- | ---- | ----------- |
-| id | bytes32 | The ID of the deal. |
-
-## IexecPocoBoostFacet
-
-Works for deals with requested trust = 0.
-
-### matchOrdersBoost
-
-```solidity
-function matchOrdersBoost(struct IexecLibOrders_v5.AppOrder appOrder, struct IexecLibOrders_v5.DatasetOrder datasetOrder, struct IexecLibOrders_v5.WorkerpoolOrder workerpoolOrder, struct IexecLibOrders_v5.RequestOrder requestOrder) external returns (bytes32)
-```
-
-This boost match orders is only compatible with trust <= 1.
-The requester gets debited.
-
-#### Parameters
-
-| Name | Type | Description |
-| ---- | ---- | ----------- |
-| appOrder | struct IexecLibOrders_v5.AppOrder | The order signed by the application developer. |
-| datasetOrder | struct IexecLibOrders_v5.DatasetOrder | The order signed by the dataset provider. |
-| workerpoolOrder | struct IexecLibOrders_v5.WorkerpoolOrder | The order signed by the workerpool manager. |
-| requestOrder | struct IexecLibOrders_v5.RequestOrder | The order signed by the requester. |
-
-#### Return Values
-
-| Name | Type | Description |
-| ---- | ---- | ----------- |
-| [0] | bytes32 | The ID of the deal. |
-
-### sponsorMatchOrdersBoost
-
-```solidity
-function sponsorMatchOrdersBoost(struct IexecLibOrders_v5.AppOrder appOrder, struct IexecLibOrders_v5.DatasetOrder datasetOrder, struct IexecLibOrders_v5.WorkerpoolOrder workerpoolOrder, struct IexecLibOrders_v5.RequestOrder requestOrder) external returns (bytes32)
-```
-
-Sponsor match orders boost for a requester.
-Unlike the standard `matchOrdersBoost(..)` hook where the requester pays for
-the deal, this current hook makes it possible for any `msg.sender` to pay for
-a third party requester.
-
-Be aware that anyone seeing a valid request order on the network
-(via an off-chain public marketplace, via a `sponsorMatchOrdersBoost(..)`
-pending transaction in the mempool or by any other means) might decide
-to call the standard `matchOrdersBoost(..)` hook which will result in the
-requester being debited instead. Therefore, such a front run would result
-in a loss of some of the requester funds deposited in the iExec account
-(a loss value equivalent to the price of the deal).
-
-#### Parameters
-
-| Name | Type | Description |
-| ---- | ---- | ----------- |
-| appOrder | struct IexecLibOrders_v5.AppOrder | The app order. |
-| datasetOrder | struct IexecLibOrders_v5.DatasetOrder | The dataset order. |
-| workerpoolOrder | struct IexecLibOrders_v5.WorkerpoolOrder | The workerpool order. |
-| requestOrder | struct IexecLibOrders_v5.RequestOrder | The requester order. |
-
-### pushResultBoost
-
-```solidity
-function pushResultBoost(bytes32 dealId, uint256 index, bytes results, bytes resultsCallback, bytes authorizationSign, address enclaveChallenge, bytes enclaveSign) external
-```
-
-Accept results of a task computed by a worker during Boost workflow.
-
-#### Parameters
-
-| Name | Type | Description |
-| ---- | ---- | ----------- |
-| dealId | bytes32 | The id of the target deal. |
-| index | uint256 | The index of the target task of the deal. |
-| results | bytes | The results of the task computed by the worker. |
-| resultsCallback | bytes | The results of the task computed by the worker that will be forwarded as call data to the callback address set by the requester. |
-| authorizationSign | bytes | The authorization signed by the scheduler. authorizing the worker to push a result. |
-| enclaveChallenge | address | The enclave address which can produce enclave signature. |
-| enclaveSign | bytes | The signature generated from the enclave. |
-
-### claimBoost
-
-```solidity
-function claimBoost(bytes32 dealId, uint256 index) external
-```
-
-Claim task to get a refund if task is not completed after deadline.
-
-#### Parameters
-
-| Name | Type | Description |
-| ---- | ---- | ----------- |
-| dealId | bytes32 | The ID of the deal. |
-| index | uint256 | The index of the task. |
-