Move ExpiredRoot & NonExistentRoot to IBaseWorldID (#109)

src/WorldIDIdentityManagerImplV1.sol

@@ -179,13 +179,6 @@ contract WorldIDIdentityManagerImplV1 is WorldIDImpl, IWorldID {
     /// @param latestRoot The actual latest root at the time of the transaction.
     error NotLatestRoot(uint256 providedRoot, uint256 latestRoot);
 
-    /// @notice Thrown when attempting to validate a root that has expired.
-    error ExpiredRoot();
-
-    /// @notice Thrown when attempting to validate a root that has yet to be added to the root
-    ///         history.
-    error NonExistentRoot();
-
     /// @notice Thrown when attempting to enable the bridge when it is already enabled.
     error StateBridgeAlreadyEnabled();
 

src/interfaces/IBaseWorldID.sol

@@ -0,0 +1,18 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+/// @title Base WorldID interface
+/// @author Worldcoin
+/// @notice The interface providing basic types across various WorldID contracts.
+interface IBaseWorldID {
+    ///////////////////////////////////////////////////////////////////////////////
+    ///                                  ERRORS                                 ///
+    ///////////////////////////////////////////////////////////////////////////////
+
+    /// @notice Thrown when attempting to validate a root that has expired.
+    error ExpiredRoot();
+
+    /// @notice Thrown when attempting to validate a root that has yet to be added to the root
+    ///         history.
+    error NonExistentRoot();
+}

src/interfaces/IWorldID.sol

@@ -1,10 +1,12 @@
 //SPDX-License-Identifier: MIT
 pragma solidity ^0.8.19;
 
+import {IBaseWorldID} from "./IBaseWorldID.sol";
+
 /// @title WorldID Interface
 /// @author Worldcoin
 /// @notice The interface to the proof verification for WorldID.
-interface IWorldID {
+interface IWorldID is IBaseWorldID {
     /// @notice Verifies a WorldID zero knowledge proof.
     /// @dev Note that a double-signaling check is not included here, and should be carried by the
     ///      caller.

src/interfaces/IWorldIDGroups.sol

@@ -1,10 +1,12 @@
 //SPDX-License-Identifier: MIT
 pragma solidity ^0.8.19;
 
+import {IBaseWorldID} from "./IBaseWorldID.sol";
+
 /// @title WorldID Interface with Groups
 /// @author Worldcoin
 /// @notice The interface to the proof verification for WorldID.
-interface IWorldIDGroups {
+interface IWorldIDGroups is IBaseWorldID {
     /// @notice Verifies a WorldID zero knowledge proof.
     /// @dev Note that a double-signaling check is not included here, and should be carried by the
     ///      caller.