IERC20Mintable, not IERC20

contracts/mocks/ExampleERC20.sol

@@ -13,8 +13,9 @@ import {
     ERC20Burnable,
     ERC20
 } from "@openzeppelin/contracts@5.0.2/token/ERC20/extensions/ERC20Burnable.sol";
+import {IERC20Mintable} from "../staking/interfaces/IERC20Mintable.sol";
 
-contract ExampleERC20 is ERC20Burnable {
+contract ExampleERC20 is ERC20Burnable, IERC20Mintable {
     string private constant _TOKEN_NAME = "Mock Token";
     string private constant _TOKEN_SYMBOL = "EXMP";
 
@@ -30,4 +31,8 @@ contract ExampleERC20 is ERC20Burnable {
 
         _mint(msg.sender, amount);
     }
+
+    function mint(address account, uint256 amount) external {
+        _mint(account, amount);
+    }
 }

contracts/staking/ERC20TokenStakingManager.sol

@@ -8,7 +8,7 @@ pragma solidity 0.8.25;
 import {IERC20TokenStakingManager} from "./interfaces/IERC20TokenStakingManager.sol";
 import {Initializable} from
     "@openzeppelin/contracts-upgradeable@5.0.2/proxy/utils/Initializable.sol";
-import {IERC20} from "@openzeppelin/contracts@5.0.2/token/ERC20/IERC20.sol";
+import {IERC20Mintable} from "./interfaces/IERC20Mintable.sol";
 import {SafeERC20TransferFrom} from "@utilities/SafeERC20TransferFrom.sol";
 import {SafeERC20} from "@openzeppelin/contracts@5.0.2/token/ERC20/utils/SafeERC20.sol";
 import {ICMInitializable} from "../utilities/ICMInitializable.sol";
@@ -20,13 +20,13 @@ contract ERC20TokenStakingManager is
     PoSValidatorManager,
     IERC20TokenStakingManager
 {
-    using SafeERC20 for IERC20;
-    using SafeERC20TransferFrom for IERC20;
+    using SafeERC20 for IERC20Mintable;
+    using SafeERC20TransferFrom for IERC20Mintable;
 
     // solhint-disable private-vars-leading-underscore
     /// @custom:storage-location erc7201:avalanche-icm.storage.ERC20TokenStakingManager
     struct ERC20TokenStakingManagerStorage {
-        IERC20 _token;
+        IERC20Mintable _token;
         uint8 _tokenDecimals;
     }
     // solhint-enable private-vars-leading-underscore
@@ -62,22 +62,25 @@ contract ERC20TokenStakingManager is
      */
     function initialize(
         PoSValidatorManagerSettings calldata settings,
-        IERC20 token
+        IERC20Mintable token
     ) external reinitializer(2) {
         __ERC20TokenStakingManager_init(settings, token);
     }
 
     // solhint-disable func-name-mixedcase
     function __ERC20TokenStakingManager_init(
         PoSValidatorManagerSettings calldata settings,
-        IERC20 token
+        IERC20Mintable token
     ) internal onlyInitializing {
         __POS_Validator_Manager_init(settings);
         __ERC20TokenStakingManager_init_unchained(token);
     }
 
     // solhint-disable func-name-mixedcase
-    function __ERC20TokenStakingManager_init_unchained(IERC20 token) internal onlyInitializing {
+    function __ERC20TokenStakingManager_init_unchained(IERC20Mintable token)
+        internal
+        onlyInitializing
+    {
         ERC20TokenStakingManagerStorage storage $ = _getERC20StakingManagerStorage();
         require(address(token) != address(0), "ERC20TokenStakingManager: zero token address");
         $._token = token;

contracts/staking/interfaces/IERC20Mintable.sol

@@ -0,0 +1,12 @@
+// (c) 2024, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+// SPDX-License-Identifier: Ecosystem
+
+pragma solidity 0.8.25;
+
+import {IERC20} from "@openzeppelin/contracts@5.0.2/token/ERC20/IERC20.sol";
+
+interface IERC20Mintable is IERC20 {
+    function mint(address account, uint256 amount) external;
+}

contracts/staking/tests/ERC20TokenStakingManagerTests.t.sol

@@ -12,16 +12,16 @@ import {PoSValidatorManagerSettings} from "../interfaces/IPoSValidatorManager.so
 import {IRewardCalculator} from "../interfaces/IRewardCalculator.sol";
 import {ICMInitializable} from "../../utilities/ICMInitializable.sol";
 import {ExampleERC20} from "@mocks/ExampleERC20.sol";
-import {IERC20} from "@openzeppelin/contracts@5.0.2/token/ERC20/IERC20.sol";
+import {IERC20Mintable} from "../interfaces/IERC20Mintable.sol";
 import {SafeERC20} from "@openzeppelin/contracts@5.0.2/token/ERC20/utils/SafeERC20.sol";
 
 // TODO: Remove this once all unit tests implemented
 // solhint-disable no-empty-blocks
 contract ERC20TokenStakingManagerTest is PoSValidatorManagerTest {
-    using SafeERC20 for IERC20;
+    using SafeERC20 for IERC20Mintable;
 
     ERC20TokenStakingManager public app;
-    IERC20 public token;
+    IERC20Mintable public token;
 
     function setUp() public virtual {
         // Construct the object under test