fix: radiant PoC

contracts/coupons/RadiantCoupon.sol

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: BUSL-1.1
+
+pragma solidity ^0.8.17;
+
+import { ERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
+import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
+import { IERC20 } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
+
+import "../utils/UUPSHelper.sol";
+
+contract RadiantCoupon is UUPSHelper, ERC20Upgradeable {
+    using SafeERC20 for IERC20;
+
+    /// @notice `Core` contract handling access control
+    ICore public core;
+
+    function initialize() public initializer {
+        __ERC20_init("RadiantCoupon", "cpRDNT");
+        __UUPSUpgradeable_init();
+    }
+
+    function _beforeTokenTransfer(address from, address to, uint256 amount) internal override {
+        // Needs an approval before hand, this is how mints are done
+        if (to == address(DISTRIBUTOR)) {
+            IERC20(RADIANT).safeTransferFrom(from, address(this), amount);
+            _mint(from, amount); // These are then transfered to the distributor
+        }
+        if (to == address(FEE_MANAGER)) {
+            IERC20(RADIANT).safeTransferFrom(from, address(FEE_MANAGER), amount);
+            _mint(from, amount); // These are then transferred to the fee manager
+        }
+    }
+
+    function _afterTokenTransfer(address from, address to, uint256 amount) internal override {
+        if (to == address(FEE_MANAGER)) {
+            _burn(to, amount); // To avoid having any token aside from on the distributor
+        }
+        if (from == address(DISTRIBUTOR)) {
+            _burn(to, amount);
+            // HERE CALL THE VESTING CONTRACT TO STAKE ON BEHALF OF THE USER
+        }
+    }
+
+    /// @inheritdoc UUPSUpgradeable
+    function _authorizeUpgrade(address) internal view override onlyGovernorUpgrader(core) {}
+}