fix: 🐛 Finance Subsidy requirement error

src/v0.8/core/finance/escrow/EscrowDataTradingFee.sol

@@ -195,50 +195,69 @@ contract EscrowDataTradingFee is EscrowBase {
         address _payer,
         address _token
     ) public view override onlyRole(roles, RolesType.DATASWAP_CONTRACT) returns (uint256 amount) {
+        (, , uint256 current, uint256 total ) = roles.finance().getAccountEscrow(
+            _datasetId,
+            _matchingId,
+            _payer,
+            _token,
+            FinanceType.Type.EscrowDataTradingFee
+        );
+
         if (_payer == roles.matchingsBids().getMatchingWinner(_matchingId)) {
             amount = roles.matchingsBids().getMatchingBidAmount(
                 _matchingId,
                 _payer
             );
         } else if (_payer == roles.datasets().getDatasetMetadataSubmitter(_datasetId)) {
-            // Source account balance
-            (, , uint256 balance, ) = roles.finance().getAccountEscrow(
-                _datasetId,
-                0,
-                _payer,
-                _token,
-                FinanceType.Type.EscrowDataTradingFee
-            );
-
-            (, , uint64 matchingSize, , , ) = roles
-                .matchingsTarget()
-                .getMatchingTarget(_matchingId);
-
-            (uint256 usedSize, , , , , ) = roles
-                .storages()
-                .getDatasetStorageOverview(_datasetId);
-
-            uint256 unusedSize = roles.datasetsProof().getDatasetSize(
-                _datasetId,
-                DatasetType.DataType.Source
-            ) *
-                roles.datasetsRequirement().getDatasetReplicasCount(_datasetId) -
-                usedSize;
-
-            amount = (balance / unusedSize) * matchingSize;
+            if (total <= 0) {
+                amount = _getSubsidyAmount(_datasetId, _matchingId, _payer, _token);
+            } else {
+                amount = total;
+            }
         } else {
             require(false, "payer account does not exist");
         }
 
-        (, , uint256 current, ) = roles.finance().getAccountEscrow(
+        amount = current >= amount ? 0 : amount - current;
+    }
+
+    /// @notice Get matching subsidy amount.
+    /// @param _datasetId The ID of the dataset.
+    /// @param _matchingId The ID of the matching process.
+    /// @param _payer An array containing the addresses of the dataset and matching process payers.
+    /// @param _token The type of token for escrow handling (e.g., FIL, ERC-20).
+    /// @return subsidy The subsidy amount.
+    function _getSubsidyAmount(
+        uint64 _datasetId,
+        uint64 _matchingId,
+        address _payer,
+        address _token
+    ) internal view returns (uint256 subsidy) {
+        // Source account balance
+        (, , uint256 balance, ) = roles.finance().getAccountEscrow(
             _datasetId,
-            _matchingId,
+            0,
             _payer,
             _token,
             FinanceType.Type.EscrowDataTradingFee
         );
 
-        amount = current >= amount ? 0 : amount - current;
+        (, , uint64 matchingSize, , , ) = roles
+            .matchingsTarget()
+            .getMatchingTarget(_matchingId);
+
+        (uint256 usedSize, , , , , ) = roles
+            .storages()
+            .getDatasetStorageOverview(_datasetId);
+
+        uint256 unusedSize = roles.datasetsProof().getDatasetSize(
+            _datasetId,
+            DatasetType.DataType.Source
+        ) *
+            roles.datasetsRequirement().getDatasetReplicasCount(_datasetId) -
+            usedSize;
+
+        subsidy = (balance / unusedSize) * matchingSize;
     }
 
     /// @dev Internal function to get payers associated with a dataset and matching process.

src/v0.8/module/matching/MatchingsBids.sol

@@ -359,13 +359,18 @@ contract MatchingsBids is
                 winner
             );
 
-            // Transfer parent account escrow to sub-account escrow
-            roles.finance().__claimMoveEscrow(
-                _datasetId,
-                _matchingId,
-                FinanceType.FIL,
-                FinanceType.Type.EscrowDataTradingFee
-            );
+            (,,,DatasetType.DataType dataType,,) = roles.matchingsTarget().getMatchingTarget(_matchingId);
+
+            if (dataType == DatasetType.DataType.Source) {
+                // Transfer parent account escrow to sub-account escrow
+                roles.finance().__claimMoveEscrow(
+                    _datasetId,
+                    _matchingId,
+                    FinanceType.FIL,
+                    FinanceType.Type.EscrowDataTradingFee
+                );
+            }
+
         } else {
             uint64 _size = _afterMatchingFailed(_matchingId);
             roles.matchings().__reportMatchingNoWinner(_matchingId, _size);