exposed nextTokenIdRangeStart (#138)

Author: GWSzeto

src/module/token/metadata/BatchMetadataERC1155.sol

@@ -9,13 +9,15 @@ contract BatchMetadataERC1155 is BatchMetadataERC721 {
     /// @notice Returns all implemented callback and module functions.
     function getModuleConfig() external pure virtual override returns (ModuleConfig memory config) {
         config.callbackFunctions = new CallbackFunction[](1);
-        config.fallbackFunctions = new FallbackFunction[](2);
+        config.fallbackFunctions = new FallbackFunction[](3);
 
         config.callbackFunctions[0] = CallbackFunction(this.onTokenURI.selector);
         config.fallbackFunctions[0] =
             FallbackFunction({selector: this.uploadMetadata.selector, permissionBits: Role._MINTER_ROLE});
         config.fallbackFunctions[1] =
             FallbackFunction({selector: this.getAllMetadataBatches.selector, permissionBits: 0});
+        config.fallbackFunctions[2] =
+            FallbackFunction({selector: this.getNextTokenIdRangeStart.selector, permissionBits: 0});
 
         config.requiredInterfaces = new bytes4[](1);
         config.requiredInterfaces[0] = 0xd9b67a26; // ERC1155

src/module/token/metadata/BatchMetadataERC721.sol

@@ -78,14 +78,16 @@ contract BatchMetadataERC721 is Module {
     /// @notice Returns all implemented callback and module functions.
     function getModuleConfig() external pure virtual override returns (ModuleConfig memory config) {
         config.callbackFunctions = new CallbackFunction[](1);
-        config.fallbackFunctions = new FallbackFunction[](2);
+        config.fallbackFunctions = new FallbackFunction[](3);
 
         config.callbackFunctions[0] = CallbackFunction(this.onTokenURI.selector);
 
         config.fallbackFunctions[0] =
             FallbackFunction({selector: this.uploadMetadata.selector, permissionBits: Role._MINTER_ROLE});
         config.fallbackFunctions[1] =
             FallbackFunction({selector: this.getAllMetadataBatches.selector, permissionBits: 0});
+        config.fallbackFunctions[2] =
+            FallbackFunction({selector: this.getNextTokenIdRangeStart.selector, permissionBits: 0});
 
         config.requiredInterfaces = new bytes4[](1);
         config.requiredInterfaces[0] = 0x80ac58cd; // ERC721.
@@ -146,6 +148,10 @@ contract BatchMetadataERC721 is Module {
         emit BatchMetadataUpdate(rangeStart, rangeEndNonInclusive - 1);
     }
 
+    function getNextTokenIdRangeStart() external view returns (uint256) {
+        return _batchMetadataStorage().nextTokenIdRangeStart;
+    }
+
     /*//////////////////////////////////////////////////////////////
                             INTERNAL FUNCTIONS
     //////////////////////////////////////////////////////////////*/

test/module/metadata/BatchMetadataERC1155.t.sol

@@ -80,4 +80,14 @@ contract BatchMetadataERC1155Test is Test {
         assertEq(batches[0].baseURI, "ipfs://base/");
     }
 
+    function test_getNextTokenIdRangeStart() public {
+        vm.prank(owner);
+        BatchMetadataExt(address(core)).uploadMetadata(100, "ipfs://base/");
+
+        // get metadata batches
+        uint256 nextTokenIdRangeStart = BatchMetadataExt(address(core)).getNextTokenIdRangeStart();
+
+        assertEq(nextTokenIdRangeStart, 100);
+    }
+
 }

test/module/metadata/BatchMetadataERC721.t.sol

@@ -80,4 +80,14 @@ contract BatchMetadataERC721Test is Test {
         assertEq(batches[0].baseURI, "ipfs://base/");
     }
 
+    function test_getNextTokenIdRangeStart() public {
+        vm.prank(owner);
+        BatchMetadataExt(address(core)).uploadMetadata(100, "ipfs://base/");
+
+        // get metadata batches
+        uint256 nextTokenIdRangeStart = BatchMetadataExt(address(core)).getNextTokenIdRangeStart();
+
+        assertEq(nextTokenIdRangeStart, 100);
+    }
+
 }