feat: mint CFG from legacy variants

src/spell/V2CleaningsSpell.sol

@@ -31,10 +31,23 @@ IERC20 constant USDC_ETHEREUM = IERC20(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB4
 IERC20 constant USDC_BASE = IERC20(0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913);
 IERC20 constant USDC_ARBITRUM = IERC20(0xaf88d065e77c8cC2239327C5EDb3A432268e5831);
 
+address constant CNF_TREASURY_WALLET = 0xD052A46b8e0C89fAcB393805E1917AfD20f293Cb;
+
+// Centrifuge Chain CFG amount derivation:
+//   Total issuance on Centrifuge Chain:             578_423_119_298_517_443_782_165_480
+//   Minus migrated CFG (4dpEcgqFp38bzzT5VruKgbfVs6zcDMFRKUetx3fz2ndLRHMu):  -350_860_057_533_953_490_820_324_585
+//   Minus chainbridge  (4dpEcgqFp8UL6eA3b7hhtdj7qftHRZE7g1uadHyuw1WSNSgH):  -192_726_451_002_520_311_526_501_638
+//   = Remaining CFG on Centrifuge Chain:              34_836_610_762_043_641_435_339_257
+uint256 constant CENTRIFUGE_CHAIN_CFG_AMOUNT = 34_836_610_762_043_641_435_339_257;
+
 uint256 constant ETHEREUM_CHAIN_ID = 1;
 uint256 constant BASE_CHAIN_ID = 8453;
 uint256 constant ARBITRUM_CHAIN_ID = 42161;
 
+interface CFGTokenLike {
+    function mint(address to, uint256 value) external;
+}
+
 interface EscrowV2Like is IAuth {
     function approveMax(address token, address spender) external;
 }
@@ -51,6 +64,7 @@ contract V2CleaningsSpell {
         _disableRootV2FromShareTokensV2(rootV3);
         _moveFundsFromEscrowToTreasury();
         _relyContractUpdaterOnHooks(rootV3);
+        _mintCFGToTreasury(rootV3);
 
         if (address(ROOT_V2).code.length > 0) {
             ROOT_V2.deny(address(this));
@@ -136,4 +150,15 @@ contract V2CleaningsSpell {
         rootV3.relyContract(FREELY_TRANSFERABLE_HOOK, CONTRACT_UPDATER);
         rootV3.relyContract(REDEMPTION_RESTRICTIONS_HOOK, CONTRACT_UPDATER);
     }
+
+    function _mintCFGToTreasury(Root rootV3) internal {
+        if (block.chainid == ETHEREUM_CHAIN_ID) {
+            // Subtract wCFG balance held by the IOU_CFG contract, since those were already
+            // redeemed 1:1 for CFG and the wCFG total supply was not reduced upon redemption.
+            uint256 amount = IERC20(WCFG).totalSupply() - IERC20(WCFG).balanceOf(IOU_CFG) + CENTRIFUGE_CHAIN_CFG_AMOUNT;
+            rootV3.relyContract(CFG, address(this));
+            CFGTokenLike(CFG).mint(CNF_TREASURY_WALLET, amount);
+            rootV3.denyContract(CFG, address(this));
+        }
+    }
 }

test/integration/spell/V2Cleanings.t.sol

@@ -33,7 +33,9 @@ import {
     ESCROW_V2,
     USDC_ETHEREUM,
     USDC_BASE,
-    USDC_ARBITRUM
+    USDC_ARBITRUM,
+    CNF_TREASURY_WALLET,
+    CENTRIFUGE_CHAIN_CFG_AMOUNT
 } from "../../../src/spell/V2CleaningsSpell.sol";
 
 contract V2CleaningsSpellTest is Test {
@@ -42,6 +44,8 @@ contract V2CleaningsSpellTest is Test {
     address constant GUARDIAN_V2_BASE = 0x427A1ce127b1775e4Cbd4F58ad468B9F832eA7e9;
     address constant ROOT_V3_ETH = 0x7Ed48C31f2fdC40d37407cBaBf0870B2b688368f;
 
+    uint256 constant MAX_POST_MINT_CFG_SUPPLY = 692_049_712_426_095_885_688_933_007;
+
     function _testCase(string memory network, string memory rpcUrl) public {
         vm.createSelectFork(rpcUrl);
 
@@ -58,6 +62,15 @@ contract V2CleaningsSpellTest is Test {
 
         // ----- PRE SPELL -----
 
+        uint256 preCfgTotalSupply;
+        uint256 preCfgMintTreasuryBalance;
+        if (CFG.code.length > 0) {
+            preCfgTotalSupply = IERC20(CFG).totalSupply();
+            preCfgMintTreasuryBalance = IERC20(CFG).balanceOf(CNF_TREASURY_WALLET);
+        }
+        uint256 preWcfgTotalSupply = block.chainid == ETHEREUM_CHAIN_ID ? IERC20(WCFG).totalSupply() : 0;
+        uint256 preWcfgBalanceOfIouCfg = block.chainid == ETHEREUM_CHAIN_ID ? IERC20(WCFG).balanceOf(IOU_CFG) : 0;
+
         IERC20 usdc = _usdc();
         uint256 preTreasuryValue;
         uint256 preEscrowValue;
@@ -100,6 +113,13 @@ contract V2CleaningsSpellTest is Test {
 
             assertEq(IAuth(CFG).wards(address(ROOT_V2)), 0);
             assertEq(IAuth(CFG).wards(IOU_CFG), 0);
+
+            // CFG minting assertions
+            uint256 expectedMintAmount = preWcfgTotalSupply - preWcfgBalanceOfIouCfg + CENTRIFUGE_CHAIN_CFG_AMOUNT;
+            assertEq(IERC20(CFG).totalSupply(), preCfgTotalSupply + expectedMintAmount);
+            assertEq(IERC20(CFG).totalSupply(), MAX_POST_MINT_CFG_SUPPLY, "Total CFG supply exceeds max post-mint cap");
+            assertEq(IERC20(CFG).balanceOf(CNF_TREASURY_WALLET), preCfgMintTreasuryBalance + expectedMintAmount);
+            assertEq(IAuth(CFG).wards(address(spell)), 0);
         }
 
         if (TRANCHE_JTRSY.code.length > 0) {