Initial Interchain token

src/protocol/tokens/regular/KlimaInterchain.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import {IERC20, ERC20, ERC20Wrapper} from "oz/token/ERC20/extensions/ERC20Wrapper.sol";
+import {ERC20Permit} from "oz/token/ERC20/extensions/ERC20Permit.sol";
+
+import {Minter} from "@axelar-network/interchain-token-service/contracts/utils/Minter.sol";
+// import {IInterchainTokenStandard} from
+//     "@axelar-network/interchain-token-service/contracts/interfaces/IInterchainTokenStandard.sol";
+
+contract KlimaInterchain is ERC20Wrapper, ERC20Permit, Minter {
+    uint8 internal immutable decimals_ = 9;
+
+    uint256 internal constant UINT256_MAX = 2 ** 256 - 1;
+
+    constructor(string memory name_, string memory symbol_, IERC20 _underlying)
+        ERC20(name_, symbol_)
+        ERC20Permit(name_)
+        ERC20Wrapper(_underlying)
+    {
+        _addMinter(msg.sender);
+    }
+
+    function decimals() public pure override(ERC20, ERC20Wrapper) returns (uint8) {
+        return decimals_;
+    }
+
+    /**
+     * @notice Function to mint new tokens.
+     * @dev Can only be called by the minter address.
+     * @param account The address that will receive the minted tokens.
+     * @param amount The amount of tokens to mint.
+     */
+    function mint(address account, uint256 amount) external onlyRole(uint8(Roles.MINTER)) {
+        _mint(account, amount);
+    }
+
+    /**
+     * @notice Function to burn tokens.
+     * @dev Can only be called by the minter address.
+     * @param account The address that will have its tokens burnt.
+     * @param amount The amount of tokens to burn.
+     */
+    function burn(address account, uint256 amount) external onlyRole(uint8(Roles.MINTER)) {
+        _burn(account, amount);
+    }
+}