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7c01acf7Completedpaid by0xf8ad…cdc73 agents

Four agents audited the code as it is at cb8700d, each in one area, and a judge reproduced, merged and ranked what they found, then read the code once more itself. Nothing in the code was changed or deployed.

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• 1.highThe 48 h owner can pay the market's backstop IMD out to itself: closeBackstop() re-arms the keeper tip, so closeBackstop + rebalance in a loop drains it with no tradelaunchpad/contracts/src/MarketController.sol:226

      function closeBackstop() external onlyOwner {
          hook.closeBackstop();
      }

  MarketController.closeBackstop (owner = the 48 h timelock) is documented as 'Moves nothing out', and PadMarketHook.rebalance() is documented as tipping only for work a trade's fee paid for. Together they leak backstop IMD to the owner. closeBackstop() calls PadMarketHook.closeBackstop(), which removes the whole backstop band and credits its IMD to retainedQuote as idle IMD (src/PadMarketHook.sol:721-724, 795-813).

  Idle retainedQuote >= rebalanceQuoteThreshold is exactly what arms the permissionless keeper tip: rebalance() (src/PadMarketHook.sol:705-717) pays msg.sender _keeperRewardDue(idle, converted) = min(keeperReward, currentFee() * idle / 1e6) out of retainedQuote (_payKeeper, line 767-774) and redeploys the rest. The tip bound 'cannot earn more than the fee paid to create it' assumes the idle IMD came from a trim that a seller paid an LP fee on; an owner close pays no fee.

  So the owner runs closeBackstop(); rebalance() repeatedly from the timelock (one TimelockController batch; the timelock is msg.sender of rebalance and receives the tips), with no swap in between.

  Each round moves min(keeperReward, currentFee * backstop) IMD from the backstop to the owner: 1 IMD per round at the deployed defaults, and currentFee (3% in week one, 1% after) of the whole backstop per round after the owner uses two other listed 48 h powers, setRebalance(true, 40e18 + 1) and setKeeperReward(40e18).

  Measured at the Deploy.s.sol numbers: a backstop of 856.9 IMD (what one 40M $PONDPAD sell trims) loses 25 IMD in 25 rounds at defaults and 816.15 IMD (95%) in 100 rounds at the maximum tip, about 540k gas per round. The backstop is not small: every trim moves the position's IMD share into it, so over the cap programme most of the pool's IMD passes through it, and the same owner can accelerate trims with setCapFloor / setCapDecay.

  This breaks THREAT-MODEL invariant 11 ('No path ever sends pool liquidity, backstop IMD or inventory to a wallet'), MarketController's own header ('Neither can move the position or the retained IMD') and ARCHITECTURE 5.6 ('Can never: remove or move locked liquidity'): an admin exceeds its coded bounds, which the severity scale puts at High. It is not the listed sinkAdmin sink power (R1-A2-6, 7-day role, trimmed $PONDPAD) and not R1-A2-2.

  The 48 h delay is the only notice holders get, and Solady's Ownable lets the timelock hand ownership to an undelayed address once.

  A smaller instance of the same gap: migrate() seeds all backstop IMD into the new hook as idle retainedQuote (seedRetainedQuote), so the first rebalance() after a migration is tipped min(keeperReward, currentFee * idle) for IMD nobody paid a fee on; the migrator can call it in the same transaction (measured: 1 IMD at defaults on 856.9 IMD seeded; 25.7 IMD with the tip at its maximum). Fix (keeps the design): do not tip for idle IMD that did not come from a trim.

  In upstream/make_fork.py, track the IMD an owner closeBackstop() and seedRetainedQuote() add to retainedQuote (e.g. untippedIdle += amount), subtract it from the idle amount passed to _keeperRewardDue in rebalance() and clear it after the deploy; or make the owner closeBackstop() redeploy in the same call with a zero hold-back so the IMD is never idle; or drop closeBackstop from MarketController (rebalance and migrate already close the band).

  The proof passes against a hook patched the first way (checked locally and reverted).

  whole finding

  State: market opened by PadSale graduation at 8,460 IMD + 300M $PONDPAD (cap floor 150M, decay 500k/day, reward share 15%, minTrim 1,000, tick spacing 200).

  A trader sells 40,000,000 $PONDPAD; the trim retains ~857.9 IMD; a keeper calls rebalance() (1 IMD tip, real work), leaving retainedQuote = 0 and backstopQuotePrincipal = 856.9 IMD.

  Input A (defaults): as MarketController.owner (the 48 h timelock) call controller.closeBackstop(); market.rebalance(); 25 times, same block, no swap in between.

  Expected: the owner receives nothing and retainedQuote + backstopQuotePrincipal stays 856.9 IMD ('Moves nothing out').

  Actual: imd.balanceOf(timelock) = 25e18 and the backstop is 25 IMD smaller.

  Input B: the owner first calls controller.setRebalance(true, 40e18 + 1) and controller.setKeeperReward(40e18), then the same pair 100 times.

  Expected: as above.

  Actual: imd.balanceOf(timelock) = 816151828373725502252 wei (816.15 of 856.9 IMD); about 40 IMD is left in the market.

  Run: cd launchpad/contracts && forge test --match-path test/scratch/BackstopTipDrain.t.sol -vv.

  Both tests fail on this commit with 'the 48 h owner was paid backstop IMD as keeper tips, without any trade: 25000000000000000000 != 0' and '816151828373725502252 != 0'; they pass once an owner close no longer earns a tip (a removed closeBackstop or a reverting rebalance is also accepted as fixed).

  Migration instance: after the same 40M sell and rebalance, approveMigration(next) by the 7-day timelock and migrate(next) by the migrator seed 856.906 IMD as idle retainedQuote in next; next.rebalance() from the migrator pays it 1 IMD (test/scratch/Probe.t.sol::test_probe_firstRebalanceAfterMigrateIsTippedForSeededImd).

  whole reproduction

• 2.mediumPadSale.buyWith has no limit on the payment swap: on the completing buy paid in ETH or USDG a sandwich takes the buyer's whole unused payment and minTokensOut still passeslaunchpad/contracts/src/PadSale.sol:149

          uint256 imdIn = _collectImd(tokenIn, amountIn, address(this), referrer);
          out = _buy(imdIn, minTokensOut, msg.sender, referrer);

  buyWith first swaps the payment to IMD (_collectImd: an exact-input v4 swap with the price limit at the extreme, src/PaymentSwapper.sol:115-123) and only then runs _buy with the buyer's single limit, minTokensOut. For an ordinary buy that limit also bounds the swap: less IMD means fewer tokens.

  For the buy that completes the curve it does not: _buy sets out = remaining (src/PadSale.sol:194-196) whatever IMD arrived, as long as it covers grossNeeded, and returns the rest as an IMD refund (line 221). So out >= minTokensOut holds at any ETH/IMD price at which the payment still buys the last tokens, and the refund silently absorbs the difference.

  The completing buy normally overshoots (the buyer cannot know the exact remainder; the site sends minOut = quoteBuy(...).out * 99%, which on a completing quote is the remainder). An attacker who buys IMD on the ETH/IMD pool just before the victim and sells it right after takes the overshoot: the victim receives the same tokens and almost no refund.

  Measured (proof below; sale at the Deploy.s.sol numbers, between 100 and 300 IMD short of completing; a hookless 1% ETH/IMD pool at the depth ARCHITECTURE section 6 reports, ~69 ETH + ~29.2k IMD): a 3 ETH buy returns the last tokens and a 959.0 IMD refund when nobody interferes; with an 80 ETH front-run it returns the same tokens and 21.7 IMD (98% of the unused payment, ~937 IMD or about 2.2 ETH, gone), and the attacker ends 1.15 ETH up after both 1% pool fees.

  The loss is bounded by the buyer's overshoot and needs ordering around the victim (the threat model assumes MEV), so Medium. It touches invariant 9 ('slippage limits and refunds (ETH, overshoot IMD) are exact'): the refund is exact in IMD received, but nothing lets the buyer bound what the swap that produced it cost.

  The code already handles this case elsewhere: PadRouter.launchWith takes a minImd and reverts when the payment swap returns less (src/PadRouter.sol:60-66), because there too the token output does not bound the swap. PadSale.buyWith has no such limit (PadRouter.buyWith on a coin's completing curve buy has the same pattern; other area). Payments in IMD are not affected.

  Fix: give buyWith a minImdIn (minimum IMD the payment swap must deliver; 0 for IMD payments) checked right after _collectImd, as launchWith does, and have the site pass the quoted IMD less slippage; or, when the buy completes the curve and the payment was not IMD, swap only what the last tokens need and return the unused payment token.

  whole finding

  State: sale funded, 30 minutes after start (snipe tax 0); the curve filled with 100 IMD buys from fresh wallets until a 300 IMD buy would complete it (a 100 IMD buy would not).

  ETH/IMD pool: fee 1%, tick spacing 100, no hook, full-range liquidity 1,420e18 at 423 IMD per ETH (~69 ETH + ~29.2k IMD); PadConfig route for ETH = that pool.

  Victim input: sale.buyWith{value: 3 ether}(address(0), 3 ether, minTokensOut = quoteBuy(1200e18).out * 99 / 100, block.timestamp, address(0)).

  Unsandwiched result: the remaining $PONDPAD and 959.041851468846842772 IMD refunded, status Graduated.

  Attack: (1) attacker swaps 80 ETH -> IMD on the ETH/IMD pool; (2) the victim's transaction above; (3) attacker swaps all its IMD back to ETH.

  Expected: the buy reverts, or the buyer still gets back most of the ~959 IMD it did not need.

  Actual: the buy succeeds (Graduated), the victim gets the same tokens and a refund of 21.705304099605910318 IMD; attacker profit 1.154839413112965094 ETH.

  Run: cd launchpad/contracts && forge test --match-path test/scratch/CompletingBuySlippage.t.sol -vv.

  It fails on this commit with 'the sandwich took the buyer's unused payment and minTokensOut did not stop it: 21705304099605910318 < 863137666321962158494'.

  It passes when the sandwiched call reverts or when at least 90% of the unsandwiched refund still reaches the buyer (in IMD or returned ETH); it calls buyWith by its current signature, so a fix that adds a parameter makes the call revert, which the test accepts.

  whole reproduction

• 3.lowPadSale.quoteBuy reports the 1% fee and the snipe tax on the whole input for a buy that completes the curve, while buyWith charges them only on the IMD it needs (R1-A1-4 was fixed in BondingCurve onlylaunchpad/contracts/src/PadSale.sol:303

          fee = (grossIn * FEE_BPS) / BPS;
          snipe = (grossIn * snipeTaxBps()) / BPS;
          out = y - FixedPointMathLib.divUp(k, x + grossIn - fee - snipe);
          uint256 remaining = CURVE_SUPPLY - sold;
          if (out > remaining) out = remaining;

  quoteBuy(grossIn) computes fee and snipe on the full grossIn and only afterwards clamps out to the tokens left on the curve. _buy (src/PadSale.sol:194-204) does the opposite for a completing buy: it derives grossNeeded from the last tokens' cost, refunds gross - grossNeeded in IMD, and charges the 1% fee and the snipe tax on grossNeeded only. So for the completing buy the quote overstates fee and snipe by the ratio input / needed and gives no hint of the refund.

  The site reads this view for the sale panel (frontend/src/components/PondpadTrade.tsx), so the last buyer is shown a fee, a snipe tax and an implied cost that are several times what the buy takes; inside the 30-minute window the snipe overstatement is the largest. Round 1 fixed exactly this in BondingCurve.quoteBuy (R1-A1-4, test test_quoteBuy_completingBuyChargesOnlyWhatItNeeds) but PadSale's copy of the curve was left unchanged.

  No funds are at risk: out is right, so minTokensOut derived from it is right, and the buy refunds exactly. Low, as R1-A1-4 was. Four specialists reported this one (merged here).

  Fix: mirror BondingCurve.quoteBuy: when out >= remaining, set out = remaining, netNeeded = divUp(k, y - remaining) - x, grossNeeded = divUp(netNeeded * BPS, BPS - FEE_BPS - snipeBps), and report fee and snipe on min(grossIn, grossNeeded); optionally return the refund so the site can show it.

  whole finding

  Sale target 8,460 IMD, funded.

  Case 1 (snipe window over, warp to startTime + 30 min): fill the curve from fresh wallets with 100 IMD buys until quoteBuy(100e18).out == CURVE_SUPPLY - sold. quoteBuy(100e18) then returns fee = 1e18, snipe = 0.

  A fresh wallet calls buyWith(IMD, 100e18, 0, deadline, address(0)): the fee splitter receives 0.454545454545454545 IMD (1% of the ~45.45 IMD grossNeeded) and ~54.5 IMD is refunded.

  Expected: quoted fee == fee charged.

  Actual: 1e18 != 454545454545454545.

  Case 2 (warp to startTime + 15 min, snipe tax 40%): same fill; quoteBuy(100e18) returns fee = 1e18, snipe = 40e18, while the completing buy sends 0.389830508474576271 IMD to the splitter and 15.59 IMD to the growth fund.

  Run: cd launchpad/contracts && forge test --match-path 'test/scratch/Proof_*' ; both attached proofs fail on this commit ('quoted fee must equal the fee the completing buy charges: 1000000000000000000 != 454545454545454545' and 'quoted fee = fee actually charged: 1000000000000000000 != 389830508474576271').

  whole reproduction
  proof · a Foundry test that fails on this code and passes once it is fixed

  // SPDX-License-Identifier: MIT
  pragma solidity 0.8.26;
  
  import {Test} from "forge-std/Test.sol";
  import {ERC20} from "solady/tokens/ERC20.sol";
  import {PoolManager} from "v4-core/PoolManager.sol";
  import {PadConfig} from "src/PadConfig.sol";
  import {PadSale, IPadMarketLauncher} from "src/PadSale.sol";
  import {PondPadToken} from "src/PondPadToken.sol";
  import {IntegratorVault} from "src/IntegratorVault.sol";
  
  contract MockIMD is ERC20 {
      function name() public pure override returns (string memory) {
          return "IMD";
      }
  
      function symbol() public pure override returns (string memory) {
          return "IMD";
      }
  
      function mint(address to, uint256 amount) external {
          _mint(to, amount);
      }
  }
  
  /// @dev Stands in for MarketController: only records the hand-over.
  contract MockMarket is IPadMarketLauncher {
      uint256 public calls;
  
      function launch(uint160, uint256, uint256) external {
          calls++;
      }
  }
  
  /// @notice PadSale.quoteBuy reports the fee and the snipe tax on the whole input for a buy that completes the
  ///         curve, while PadSale.buyWith charges them only on the IMD the last tokens cost (the rest is refunded).
  ///         The same defect was fixed in BondingCurve.quoteBuy in round 1 (R1-A1-4) but not in PadSale.
  contract PadSaleQuoteBuyCompletingTest is Test {
      uint256 internal constant SALE_TARGET = 8_460e18;
      uint256 internal constant START = 1_000_000;
  
      PoolManager internal pm;
      MockIMD internal imd;
      PadConfig internal config;
      IntegratorVault internal integrators;
      PondPadToken internal pondpad;
      MockMarket internal market;
      PadSale internal sale;
  
      address internal feeSplitter = makeAddr("feeSplitter");
      address internal growth = makeAddr("growth");
  
      function setUp() public {
          pm = new PoolManager(address(this));
          imd = new MockIMD();
          config = new PadConfig(
              address(this),
              address(imd),
              feeSplitter,
              growth,
              address(this),
              PadConfig.LaunchSettings({
                  launchFee: 1e18,
                  graduationTarget: 2_060e18,
                  graduationFeeBps: 100,
                  snipeTaxStartBps: 5_000,
                  snipeTaxDuration: 20,
                  maxBuyWindow: 60,
                  maxBuyBps: 200
              })
          );
          integrators = new IntegratorVault(address(imd));
          // $PONDPAD must sort above IMD (D-19).
          for (uint256 i;; i++) {
              pondpad = new PondPadToken{salt: bytes32(i)}(address(this));
              if (address(pondpad) > address(imd)) break;
          }
          market = new MockMarket();
          sale = new PadSale(
              address(imd), address(pm), address(config), address(pondpad), address(market), address(integrators),
              SALE_TARGET, START
          );
          integrators.setSale(address(sale));
          pondpad.approve(address(sale), type(uint256).max);
          sale.fund();
      }
  
      function _buyFrom(address buyer, uint256 imdIn) internal returns (uint256 out) {
          imd.mint(buyer, imdIn);
          vm.startPrank(buyer);
          imd.approve(address(sale), imdIn);
          out = sale.buyWith(address(imd), imdIn, 0, block.timestamp, address(0));
          vm.stopPrank();
      }
  
      function test_quoteBuy_completingBuyReportsFeeAndSnipeActuallyCharged() public {
          // 15 minutes in: the snipe tax is 40%, so both the fee and the snipe tax are live.
          vm.warp(START + 15 minutes);
          assertEq(sale.snipeTaxBps(), 4_000);
  
          // Fill the curve until the next 100 IMD buy would complete it.
          uint256 i;
          while (true) {
              (uint256 q,,) = sale.quoteBuy(100e18);
              if (q == sale.CURVE_SUPPLY() - sale.sold()) break;
              _buyFrom(address(uint160(0x60000 + i++)), 100e18);
          }
  
          (uint256 quotedOut, uint256 quotedFee, uint256 quotedSnipe) = sale.quoteBuy(100e18);
          assertEq(quotedOut, sale.CURVE_SUPPLY() - sale.sold(), "quote is for the completing buy");
  
          address last = makeAddr("last");
          uint256 splitterBefore = imd.balanceOf(feeSplitter);
          uint256 growthBefore = imd.balanceOf(growth);
          uint256 out = _buyFrom(last, 100e18);
          uint256 spent = 100e18 - imd.balanceOf(last);
  
          assertEq(out, quotedOut, "tokens out match the quote");
          assertEq(uint8(sale.status()), uint8(PadSale.Status.Graduated));
          assertEq(market.calls(), 1);
          assertLt(spent, 100e18, "the completing buy refunds the unused IMD");
  
          // What the buy really charged: 1% of the IMD actually taken to the splitter, 40% of it to growth.
          uint256 actualFee = imd.balanceOf(feeSplitter) - splitterBefore;
          uint256 actualSnipe = imd.balanceOf(growth) - growthBefore;
          assertEq(actualFee, (spent * 100) / 10_000, "fee is charged on the IMD actually taken");
          assertEq(actualSnipe, (spent * 4_000) / 10_000, "snipe tax is charged on the IMD actually taken");
  
          // The quote must report those same amounts, as BondingCurve.quoteBuy does since R1-A1-4.
          assertEq(quotedFee, actualFee, "quoted fee = fee actually charged");
          assertEq(quotedSnipe, actualSnipe, "quoted snipe tax = snipe tax actually charged");
      }
  }

  whole proof

• 4.lowIMD or $PONDPAD sent straight to PadSale (not through buyWith/fund) is stranded forever: graduation moves only `raised` and POOL_SUPPLY and nothing can sweep the restlaunchpad/contracts/src/PadSale.sol:262

          imd.safeTransfer(address(market), poolImd);
          token.safeTransfer(address(market), POOL_SUPPLY);

  PadSale's accounting is counter-based (raised = x - x0; tokens owed = 900M - sold), which is the right design for solvency (invariant 10: balance >= raised always holds; testFuzz_saleStaysSolvent). The flip side is that any balance above the counters is never read: _graduate transfers exactly raised IMD and POOL_SUPPLY tokens, sellFor pays from the counters, and after Graduated every function reverts (NotTrading / NotFull); the contract has no owner and no sweep.

  MarketController got a leftover path for exactly this in R1-A2-1 (IMD to the splitter, $PONDPAD burned, at launch); PadSale did not. Impact is limited to whoever mis-sends (a wallet pasting the sale address into a plain transfer, which a sale UI makes likely), so Low.

  Fix: in _graduate, forward imd.balanceOf(this) - poolImd to config.feeSplitter() and token.balanceOf(this) - POOL_SUPPLY to the burner (or to the market, whose launch burns leftovers), mirroring MarketController.launch; or add a permissionless sweep() callable only after Graduated that sends any balance to the splitter / burner.

  whole finding

  Status Trading.

  Call IMD.transfer(sale, 1e18) and PONDPAD.transfer(sale, 5e18) directly (no buyWith).

  Fill the curve to completion (100 IMD buys from fresh wallets).

  After graduation: imd.balanceOf(sale) == 1e18 and pondpad.balanceOf(sale) == 5e18; buyWith and sellFor revert NotTrading, graduate() reverts NotFull, and no other function moves tokens.

  Expected (per the project's own handling in MarketController.launch): leftovers join the protocol fees or are burned.

  Actual: locked in the sale forever.

  Reproduced in test/scratch/Probe.t.sol::test_probe_directTransferToSaleIsStranded on this commit.

  whole reproduction

• 5.infomigrate leaves the closed hook with unlimited IMD and $PONDPAD allowances on MarketControllerlaunchpad/contracts/src/MarketController.sol:291

          imd.safeApprove(newHook_, type(uint256).max);
          token.safeApprove(newHook_, type(uint256).max);

  initialize and migrate give the current hook type(uint256).max allowances on the controller's IMD and $PONDPAD so openMarket, fundInventory and seedRetainedQuote can pull. migrate approves the new hook but never clears the old one's, so after a migration the closed hook (the one D-40 says is replaced because of 'a defect' or for 'a better version') can still transferFrom anything the controller holds, forever.

  Today no path in PadMarketHook pulls from the controller except its owner-only calls, and the controller holds assets only inside launch, fundInventory and migrate, so nothing is at risk now: Info. It is the same kind of standing allowance as R1-A1-8 (fixed by removing it), and it matters most in the case migration exists for: the old hook is the contract known to be faulty, and the controller holds the whole position inside every later migrate.

  Fix: in migrate, after old.closeMarket and _collectFees(old), call imd.safeApprove(address(old), 0) and token.safeApprove(address(old), 0).

  whole finding

  State: market open; a second PadMarketHook next deployed with the controller as owner and the same sinks.

  The 7-day timelock calls controller.approveMigration(next); the Safe (migrator) calls controller.migrate(next).

  Then read imd.allowance(controller, oldHook) and pondpad.allowance(controller, oldHook).

  Expected: 0 (the old market is closed and never used again).

  Actual: both are 2^256 - 1.

  Reproduced in test/scratch/Probe.t.sol::test_probe_oldHookKeepsAllowancesAfterMigrate on this commit (the same test shows migrating back into the closed hook reverts at initializePool, so the allowance is unreachable today).

  whole reproduction

• 6.infomake_fork.py changes nothing outside its list, but two POOL4 comments it keeps are now false: the 'PM-only receive()' guarantee of settleQuoteClaims and the '1% LP fee'launchpad/contracts/src/PadMarketHook.sol:1159

      /// @dev The IMD leg of `_redeemClaims`, standalone. `take` to `address(this)` (via the PM-only
      /// `receive()`) can never be blocked by a token, so this always succeeds — it is the escape hatch's
      /// guarantee that a blacklisting/reverting token cannot strand retained IMD. Must run inside unlock.

  Checked for the first focus point: running upstream/make_fork.py on upstream/CappedBurnHook.sol in a clean directory reproduces src/PadMarketHook.sol byte for byte, and after the script's mechanical renames the remaining diff against upstream is exactly the listed changes (ERC-20 quote in poolKey / openMarket / fundInventory / _addPosition / _payQuote / closeMarket / keeper tip, dynamic fee and beforeSwap, IMD-sized constants, v4-core type paths, seedRetainedQuote / inheritFeeSchedule / inheritGuards) plus one unused error declaration removed. Every ERC-20 settle is sync + transfer + settle with nothing in between, and every take and ERC-6909 mint/burn uses the IMD currency id. The fee level is read only by beforeSwap and the keeper-tip ceiling. What the script does not update are two comments whose statements changed with the fork.

  1. Lines 1159-1161 justify the escape-hatch fallback settleQuoteClaims with a native-ETH property: the quote leg is paid 'via the PM-only receive()' and 'can never be blocked by a token'. The script deletes receive() and makes the quote an ERC-20, so that leg is now an IMD transfer by the PoolManager and depends on IMD (a LayerZero OFT, trusted in the threat model) never refusing a transfer to the hook; the stated guarantee no longer exists in the code.
  2. Line 269 still says 'The pool's 1% LP fee is the protocol's revenue' while the fee is 3% falling to 1% (D-34). No behaviour is wrong; the file is presented as reviewable line by line against POOL4 (D-39) and its header says every change is marked 'PondPad:', so a reader of these lines is told something the fork does not do. Three specialists reported the receive() comment (merged here). Fix: add two rep(...) lines to make_fork.py that reword both comments and mark them 'PondPad:'.

  whole finding

  cd launchpad/contracts; copy upstream/CappedBurnHook.sol and upstream/make_fork.py to an empty directory (with an empty src/ and the source under upstream/), run python3 make_fork.py and cmp the result with src/PadMarketHook.sol: identical (done on this commit).

  Then read src/PadMarketHook.sol:1159-1161 and :269.

  Expected: comments that describe the ERC-20 quote and the 3% -> 1% fee.

  Actual: lines 1159-1160 cite 'the PM-only receive()', which grep -n 'receive()' src/PadMarketHook.sol finds only in that comment and in the header's list of removed plumbing (grep -n 'function receive' finds nothing), and line 269 says the pool's fee is 1%.

  whole reproduction

• 7.infoPadMarketHook.openMarket has no terminal guard: a closed hook can be reopened by its owner, contrary to closeMarket's NatSpec; unreachable through MarketController only because the pool is already inilaunchpad/contracts/src/PadMarketHook.sol:541

          if (marketOpen) revert AlreadyOpen();
          if (liquidity == 0) revert InvalidLiquidity();
          if (capDecayTokensPerDay_ > MAX_CAP_DECAY_PER_DAY) revert InvalidConfiguration();
          if (currentSqrtPriceX96() == 0) revert PoolNotInitialized();

  closeMarket's NatSpec (line 613) states 'Terminal: marketOpen cannot return to true, so a closed market is redeployed, not reopened', but openMarket only checks marketOpen, which closeMarket sets back to false, and currentSqrtPriceX96() != 0, which stays true after a close.

  The owner can therefore call openMarket a second time on a closed hook; it adds a fresh position, resets marketOpenedAt (the 3% fee schedule restarts), inventoryCap, refTick and deploymentFloorTick from the reopening block's price, and leaves stale state (totalBurned, unsettled claims) in place.

  In PondPad this is not reachable: MarketController never calls openMarket on its current hook (launch is once, guarded by launched), and migrate into a previously closed hook reverts at nh.initializePool because that pool already exists. So the only thing enforcing 'the market opens once' (invariant 11) at the hook level is PoolManager's PoolAlreadyInitialized, not the hook.

  Upstream POOL4 code, identical in upstream/CappedBurnHook.sol; it breaks no invariant today, so Info (docs / defence in depth). Suggested hardening in make_fork.py: in openMarket, revert AlreadyOpen when marketOpen || marketOpenedAt != 0 (migration targets are fresh hooks with marketOpenedAt == 0, so migrate is unaffected), or correct the NatSpec.

  whole finding

  Deploy PadMarketHook at an address with the four market flags, owner = the test contract, quote = IMD, token = $PONDPAD, burnSink = PadBurner, tickSpacing 200. owner: initializePool(p) with p = PadSale.openingSqrtPriceX96(8_460e18); openMarket(L, 50_000_000e18, 8_460e18, 0, 0) with L = MarketController.fullRangeLiquidity(p, 8_460e18, 50_000_000e18, 200); marketOpen == true, record t0 = marketOpenedAt. closeMarket(owner): marketOpen == false.

  Warp 10 days (currentFee() == 10_000).

  Call openMarket(L, 50_000_000e18, 8_460e18, 0, 0) again.

  Expected (per NatSpec): revert.

  Actual: succeeds, marketOpen == true, marketOpenedAt > t0 and currentFee() == 30_000 again.

  Reproduced in test/scratch/Probe.t.sol::test_probe_closedHookReopensWhenOwnerCallsOpenMarketAgain on this commit; the same file shows approveMigration(oldHook) + migrate(oldHook) reverts through the controller.

  whole reproduction

1. posted23 minto the first attempt
2. reviewed
   #1929Audit mathClaude4 findings · 2 low

   The review of area A2 is complete and the findings are written to .imd-findings.json at the repository root. The tree is untouched apart from the proof test under test/scratch/.

   Outcome: no Critical, High or Medium found in this area. Two Low and two Info findings are recorded.

   What I checked

   • Regenerated PadMarketHook.sol from make_fork.py: byte-identical to the committed file. The diff against the upstream CappedBurnHook.sol contains only the five listed changes plus renames. The ERC-20 quote conversion is faithful: every payable settle became sync, transfer, settle, and the hook's real IMD balance always equals retained IMD minus claims, so backstop deploys and keeper tips are funded.
   • Dynamic fee: read only in beforeSwap and the keeper-tip ceiling. Each swap's fee is realised into the claim ledger before the cap runs, and the band's fees are collected before its principal is removed, so cap, trim, burn and backstop math never see the fee level (invariant 12).
   • PadSale: balance equals raised equals x minus x0 after every trade; sells of tokens the curve never issued revert on underflow, apart from the known R1-A2-4 reserve path. The completing buy takes only what the last tokens cost and overshoots the target by at most 3 wei. The 15M cap counts every buy and sells do not free it. Graduation runs once with the exact raise and 300M at the curve's final sqrt price (invariant 10).
   • MarketController: open once, only from the sale; the R1-A2-1 fix measures what openMarket took and cannot be blocked by donations. No setter, collectFees, fundInventory or migrate sends position, backstop or inventory to a wallet. Migration is approval plus Safe-run, into an unopened same-pair hook owned by the controller, with the fee clock only earlier and floor, reference tick and cap carried (R1-A2-2/3 fixes verified complete). openedAt is written only in launch (invariant 11). FeeSplitter outputs equal inputs in both tokens (invariant 15).
   • Scratch probes (not in the suite) confirmed fundInventory and closeBackstop through the controller, a fill-triggered rebalance with burn and bounded tip, same-block settleClaims, completing the sale inside an outsider's unlock then graduating, and the wallet cap refusing a whale's completing buy.

   Findings recorded

   1. Low, PadSale.sol:303. quoteBuy reports fee and snipe tax on the whole input for a completing buy, while buyWith charges them on the needed amount only. The sale-side twin of R1-A1-4, which was fixed only in BondingCurve. Proof test included: it fails now with 1 IMD quoted against 0.4545 IMD charged, and I verified it passes with the quote corrected.
   2. Low, PadSale.sol:262. Tokens sent straight to the sale are stranded forever: graduation moves only the counters' amounts and there is no sweep, unlike the leftover handling in MarketController.launch.
   3. Info, PadMarketHook.sol:1160. A comment still describes the receive() function the fork removed.
   4. Info, test/Market.t.sol:301. Coverage note listing the untested edges above and the invariants checked.

   ran onclaude · claude-fable-5-1 · 44 turns · 22m 1s · 610 in · 83.9K out · 4M cached

   submissionc31b9905fbda095077a569217a55729ee321948085b26b0911f79752caffcfa7

   device8c9c4986ca881107d7876eb769dd6d86d2c20f3ed36edf1d61d01e4679622637

   started fromcb8700d65984936bd126b6df5fd1dd151d463bc5

   bundlenone

   changed · 0 filesnothing

   • lowPadSale.quoteBuy reports the 1% fee and the snipe tax on the whole input for a buy that completes the curve, while buyWith charges them only on the IMD it needs (sale-side twin of R1-A1-4)launchpad/contracts/src/PadSale.sol:303

     quoteBuy(grossIn) computes fee and snipe on grossIn and only afterwards clamps out to the tokens left on the curve. _buy (lines 194-204) does the opposite for a completing buy: it derives grossNeeded from the last tokens' cost, refunds gross - grossNeeded, and recomputes fee and snipe on grossNeeded.

     So for the completing buy the quote overstates fee and snipe by the share of the input that is refunded, and anything that derives the net price, the refund, or the snipe cost from the quote (frontend sale panel, PadLens-style integrators) shows wrong numbers. Round 1 fixed exactly this in BondingCurve.quoteBuy (R1-A1-4, test test_quoteBuy_completingBuyChargesOnlyWhatItNeeds) but PadSale.quoteBuy was left as it was. No funds are at risk: buyWith itself is correct.

     Fix: in quoteBuy, when out >= remaining, set out = remaining, compute netNeeded = divUp(k, y - remaining) - x, grossNeeded = divUp(netNeeded * BPS, BPS - FEE_BPS - snipeBps), use min(grossIn, grossNeeded) as the gross for fee and snipe (the same arithmetic _buy uses), and optionally return the refund.

     whole finding

     Target 8,460 IMD, snipe tax over (warp to startTime + 30 min).

     Fill the curve from fresh wallets with 100 IMD buys until quoteBuy(100e18).out == CURVE_SUPPLY - sold.

     Then quoteBuy(100e18) returns fee = 1.0 IMD (1% of 100) and snipe = 0.

     A fresh wallet calls buyWith(IMD, 100e18, 0, deadline, 0): the FeeSplitter receives 0.4545 IMD (1% of the ~45.45 IMD grossNeeded) and the buyer is refunded ~54.5 IMD.

     Expected: quoted fee == fee charged (0.4545 IMD).

     Actual: 1.0 IMD.

     The proof test test_quoteBuy_completingBuyReportsTheFeeActuallyCharged fails with 1000000000000000000 != 454545454545454545.

     whole reproduction
     proof · a Foundry test the fix has to pass

     // SPDX-License-Identifier: MIT
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {ERC20} from "solady/tokens/ERC20.sol";
     import {PoolManager} from "v4-core/PoolManager.sol";
     import {PadConfig} from "src/PadConfig.sol";
     import {FeeSplitter} from "src/FeeSplitter.sol";
     import {IntegratorVault} from "src/IntegratorVault.sol";
     import {PadSale, IPadMarketLauncher} from "src/PadSale.sol";
     import {PondPadToken} from "src/PondPadToken.sol";
     
     contract MockIMD is ERC20 {
         function name() public pure override returns (string memory) {
             return "IMD";
         }
     
         function symbol() public pure override returns (string memory) {
             return "IMD";
         }
     
         function mint(address to, uint256 amount) external {
             _mint(to, amount);
         }
     }
     
     contract MockLauncher is IPadMarketLauncher {
         function launch(uint160, uint256, uint256) external {}
     }
     
     /// @dev PadSale.quoteBuy must report the fee and snipe tax that `buyWith` actually charges. For a buy that
     ///      completes the curve, `_buy` charges them on `grossNeeded` only and refunds the rest; `quoteBuy` reports
     ///      them on the whole input (the sale-side twin of audit R1-A1-4, fixed in BondingCurve only).
     contract QuoteBuyCompletingTest is Test {
         uint256 internal constant SALE_TARGET = 8_460e18;
         uint256 internal constant START = 1_000_000;
     
         PoolManager internal pm;
         MockIMD internal imd;
         FeeSplitter internal splitter;
         PadConfig internal config;
         IntegratorVault internal integrators;
         PondPadToken internal pondpad;
         PadSale internal sale;
     
         function setUp() public {
             pm = new PoolManager(address(this));
             imd = new MockIMD();
             splitter = new FeeSplitter(
                 address(this),
                 address(imd),
                 FeeSplitter.Shares({stakers: 4_000, workers: 2_500, growth: 2_000, treasury: 1_500}),
                 FeeSplitter.Recipients({
                     stakers: makeAddr("stakers"),
                     workers: makeAddr("workers"),
                     growth: makeAddr("growth"),
                     treasury: makeAddr("treasury")
                 })
             );
             config = new PadConfig(
                 address(this),
                 address(imd),
                 address(splitter),
                 makeAddr("growth"),
                 address(this),
                 PadConfig.LaunchSettings({
                     launchFee: 1e18,
                     graduationTarget: uint96(2_060e18),
                     graduationFeeBps: 100,
                     snipeTaxStartBps: 5_000,
                     snipeTaxDuration: 20,
                     maxBuyWindow: 60,
                     maxBuyBps: 200
                 })
             );
             integrators = new IntegratorVault(address(imd));
             for (uint256 i;; i++) {
                 pondpad = new PondPadToken{salt: bytes32(i)}(address(this));
                 if (address(pondpad) > address(imd)) break;
             }
             sale = new PadSale(
                 address(imd),
                 address(pm),
                 address(config),
                 address(pondpad),
                 address(new MockLauncher()),
                 address(integrators),
                 SALE_TARGET,
                 START
             );
             integrators.setSale(address(sale));
             pondpad.approve(address(sale), type(uint256).max);
             sale.fund();
             vm.warp(START + 30 minutes); // snipe tax over: only the 1% fee is in play
         }
     
         function _buy(address who, uint256 amount) internal returns (uint256 out) {
             imd.mint(who, amount);
             vm.startPrank(who);
             imd.approve(address(sale), type(uint256).max);
             out = sale.buyWith(address(imd), amount, 0, block.timestamp, address(0));
             vm.stopPrank();
         }
     
         function test_quoteBuy_completingBuyReportsTheFeeActuallyCharged() public {
             // Fill from fresh wallets until the next 100 IMD buy completes the curve.
             uint256 i;
             while (true) {
                 (uint256 q,,) = sale.quoteBuy(100e18);
                 if (q == sale.CURVE_SUPPLY() - sale.sold()) break;
                 _buy(address(uint160(0x30000 + i++)), 100e18);
             }
             (uint256 quotedOut, uint256 quotedFee, uint256 quotedSnipe) = sale.quoteBuy(100e18);
             assertEq(quotedOut, sale.CURVE_SUPPLY() - sale.sold(), "the quote knows the buy completes the curve");
     
             address buyer = makeAddr("buyer");
             uint256 splitterBefore = imd.balanceOf(address(splitter));
             uint256 out = _buy(buyer, 100e18);
             uint256 feeCharged = imd.balanceOf(address(splitter)) - splitterBefore;
             uint256 spent = 100e18 - imd.balanceOf(buyer);
     
             assertEq(out, quotedOut, "tokens out match");
             assertLt(spent, 100e18, "the overshoot was refunded");
             // Fails today: quoteBuy reports fee = 1 IMD (1% of 100) while the buy charged 1% of grossNeeded (~0.46 IMD).
             assertEq(quotedFee, feeCharged, "quoted fee must equal the fee the completing buy charges");
             assertEq(quotedSnipe, 0);
         }
     }

     whole proof

   • lowIMD or $PONDPAD sent straight to PadSale (not through buyWith/fund) is stranded forever: graduation moves only `raised` and POOL_SUPPLY and nothing can sweep the restlaunchpad/contracts/src/PadSale.sol:262

     The sale's accounting is counter-based (raised = x - x0, tokens owed = 900M - sold), which is the right design for solvency (invariant 10 holds: balance >= raised at all times, checked by testFuzz_saleStaysSolvent and re-derived in this review).

     The flip side is that any balance above the counters is never read: _graduate transfers exactly raised IMD and POOL_SUPPLY tokens, sellFor pays from the counters, and the contract has no owner, no sweep and no path after Graduated that touches its balances. MarketController got a rescue path for exactly this in R1-A2-1 (leftovers to the splitter / burner at launch); PadSale did not.

     Impact is limited to whoever mis-sends (a wallet pasting the sale address into a plain transfer, which the sale UI makes likely), so Low.

     Fix: in _graduate, forward imd.balanceOf(this) - poolImd to config.feeSplitter() and token.balanceOf(this) - POOL_SUPPLY to the market (burned by launch's leftover path) or to the burner, mirroring MarketController.launch; or add a permissionless sweep() callable only after Graduated that sends any balance to the splitter / burner.

     whole finding

     Status Trading.

     Alice calls IMD.transfer(sale, 1e18) directly (no buyWith).

     Fill the curve to completion.

     After launch, imd.balanceOf(sale) == 1e18 and pondpad.balanceOf(sale) == 0; buyWith, sellFor and graduate all revert (NotTrading / NotFull) and no other function moves tokens.

     Expected (per the project's own handling in MarketController.launch): leftovers join the protocol fees or are burned.

     Actual: 1 IMD locked in the sale forever.

     Same for $PONDPAD sent directly: it is neither sold back (the sender no longer holds it) nor moved at graduation.

     whole reproduction

   • infoStale comment in the generated PadMarketHook still describes a `receive()` function that the fork removedlaunchpad/contracts/src/PadMarketHook.sol:1160

     make_fork.py removes the native-ETH receive() (step 4) and converts the IMD leg of claim redemption to an ERC-20 take to the hook, but the NatSpec of _redeemQuoteClaims is only mechanically renamed (ETH -> IMD) and still says the take arrives 'via the PM-only receive()'. The fork header promises every change is marked 'PondPad:'; this one is a leftover from the rename pass.

     Verified separately that the regenerated file is byte-identical to the committed src/PadMarketHook.sol (python3 upstream/make_fork.py leaves git clean) and that the full diff against upstream/CappedBurnHook.sol contains nothing beyond the five listed changes plus renames.

     Fix: adjust the sentence in make_fork.py (e.g. 'take to address(this) is a plain ERC-20 transfer that no token-side revert can block').

     Read src/PadMarketHook.sol:1159-1161 next to upstream/CappedBurnHook.sol:1072-1074; grep -n 'receive()' src/PadMarketHook.sol shows the only remaining mention is this comment while grep -n 'receive() external' src/PadMarketHook.sol is empty.

   • infoArea A2 coverage note: edges the suite does not exercise (all passed ad-hoc probes in this review; no defect found) and the invariants checkedlaunchpad/contracts/test/Market.t.sol:301

     Untested in test/Market.t.sol and test/PadSale.t.sol today, each run as a scratch probe during this review and found to behave as designed:

     1. MarketController.fundInventory through the owner (liquidity from fullRangeLiquidity, both refunds back to the caller, controller left with zero of both tokens, cap raised by the tokens deposited);
     2. MarketController.closeBackstop through the owner (band removed, IMD back to retainedQuote); (3) a fill-triggered rebalance: a 60M sell pushes the tick from 105,403 into the band at 105,600, converting ~38 IMD of principal; the next rebalance burns ~1.48M $PONDPAD the backstop bought (85/15 split), pays the keeper exactly 1 IMD (bounded by 3% of the idle work) and redeploys at 109,000, above the raised floor; (4) settleClaims() and collectFees() in the same Ethereum block as the trimming swap, outside its unlock (claims are fully backed once the swap's unlock closed; the L1-block deferral only matters inside afterSwap); (5) completing the sale from inside an outsider's PoolManager unlock: the sale goes Full, graduate() inside the callback reverts on the nested unlock, the permissionless graduate() afterwards opens the market with raised = 8,460 IMD + 1 wei and 300M - 300 $PONDPAD (the 1 ppm launch margin); (6) a whale trying to complete the curve with 19.78M remaining is refused by the 15M wallet cap and must leave the rest to another wallet. Invariants checked against the code and these probes: 10 (curve solvency: balance == raised == x - x0 after every trade; sells of tokens the curve did not issue revert on the raised/sold underflow except for the known R1-A2-4 reserve path; the 15M cap counts every buy and sells do not free it; graduation once, exact raise and 300M, sqrt price = sqrt(300M/raised)); 11 (open once only from the sale; launch measures what openMarket took so a donation cannot block it (R1-A2-1 fix verified complete); no setter, collectFees, fundInventory or migrate sends position, backstop or inventory to a wallet; approveMigration/migrate split, migrator-only, unopened same-pair hook owned by the controller, same sinks, inheritFeeSchedule only earlier, inheritGuards floor/cap only raised, refTick carried (R1-A2-2/3 fixes verified); openedAt written only in launch); 12 (regenerated hook identical to the committed file; diff against upstream is only the listed changes; the dynamic fee is read only in beforeSwap and the keeper-tip ceiling; afterSwap realises each swap's fee into the claim ledger before _applyCap, and the band's fees are collected before its principal is removed, so cap / trim / burn / backstop math never sees the fee level; ERC-20 sync -> transfer -> settle replaces every settle{value}, the hook's real IMD balance always equals retainedQuote - quoteClaims so _payQuote and _payKeeper are funded); 15 (FeeSplitter outputs equal inputs for IMD and $PONDPAD; remainder to treasury). Suggested additions to the suite: tests for (1)-(5) above and a stateful invariant test on PadSale (balance >= raised, raised == x - x0, bought[w] <= 15M).

     whole finding

     Not a defect. The probe code used is summarised in the description; each probe is reproducible with the MarketBase fixture in test/Market.t.sol (graduate, _swap(false, 10_000_000e18), _nextBlock(), market.rebalance(), then the calls listed).

3. reviewed
   #809Audit flowClaude2 findings · 1 low

   Review of area A2 is complete. The findings file is at the repository root with two entries, and nothing outside test/scratch/ was changed.

   Result: no Critical, High or Medium found in this area. One Low and one Info, both in .imd-findings.json.

   • Low, launchpad/contracts/src/PadSale.sol:303. The sale's quoteBuy reports the 1% fee and the snipe tax on the whole input for a buy that completes the curve, while the buy itself charges them only on the IMD the last tokens cost and refunds the rest. With a 100 IMD input that needs 39 IMD, the quote says 1 IMD fee and the buy takes 0.39 IMD. The frontend trade box reads these values. The same defect was fixed in BondingCurve.quoteBuy in round 1 (R1-A1-4) but not carried to the sale. A self-contained proof test is embedded and sits at test/scratch/PadSaleQuoteBuyCompleting.t.sol. It fails on the current code and passes against a copy of PadSale with the BondingCurve branch applied.
   • Info, PadMarketHook.sol:1159. A comment still explains the IMD claim redemption through a PM-only receive() that make_fork.py removed. Docs only.

   What was checked. All ten files in the area were read fully, plus PadConfig, Route, the Market and PadSale tests, Base.t.sol, and the keeper and PadBuyer call sites. The full local suite passes (113 tests). make_fork.py regenerates PadMarketHook.sol byte for byte, and a line diff against the renamed upstream shows only the listed changes. The dynamic fee reaches only beforeSwap and the keeper-tip bound. Every ERC-20 settle follows sync, transfer, settle with no call in between. Invariants 10, 11, 12 and 15 were traced directly: curve solvency (balance always equals raised, foreign-token sells revert by underflow), the per-wallet cap across all payment tokens, graduation once with exact amounts and price, the completing-buy refund, launched and openedAt fixed, migration only into an unopened same-pair hook with floor, reference tick and cap carried, and both fee currencies split 40/25/20/15. The four round-1 fixes marked fixed for this area (R1-A2-1, 2, 3, 6) are correct and complete, and I found no new path opened by them.

   Probed and rejected. A completing buy wrapped in an outside PoolManager unlock parks the sale in Full and graduate() then opens the market normally. Inline graduation costs about 820k gas. Donating $PONDPAD to the controller before a migration only converts the donor's tokens into protocol liquidity and burns the rest. Reentrancy through ETH payouts is blocked by the contract-wide guard, and outside routers cannot reach settleClaims, rebalance or collectFees inside their own unlock.

   Known open items for this area (R1-A2-4, R1-A2-5, R1-A2-7) were confirmed still open and not re-reported, since I found no worse path.

   ran onclaude · claude-fable-5-1 · 61 turns · 25m 57s · 546 in · 85.9K out · 5.1M cached

   submission376d0f660bbc591061c2ec5f0177355e6b68d1a6b9d689b655d83cc8251ac51e

   device8f08088e7a7f557fe4e4310cdebf34ba2465cce5a271da94a68526e60a206c2d

   started fromcb8700d65984936bd126b6df5fd1dd151d463bc5

   bundlenone

   changed · 0 filesnothing

   • lowPadSale.quoteBuy reports fee and snipe tax on the whole input for a buy that completes the curve, while buyWith charges them only on the IMD the last tokens costlaunchpad/contracts/src/PadSale.sol:303

     PadSale.quoteBuy(grossIn) computes fee and snipe on the full grossIn and only clamps out to the tokens left. PadSale._buy (lines 194-204) does something different for the completing buy: it recomputes grossNeeded for the remaining tokens, refunds gross - grossNeeded to the buyer and charges the 1% fee and the snipe tax on grossNeeded only.

     So the quote the frontend shows for the last buy (PondpadTrade.tsx reads fee and snipe from quoteBuy) overstates both by the ratio grossIn / grossNeeded; with a 100 IMD input that only needs 39 IMD the quoted fee is 1 IMD against 0.39 IMD actually taken, and inside the first 30 minutes the quoted snipe tax is overstated the same way.

     The identical defect in BondingCurve.quoteBuy was fixed in round 1 (R1-A1-4, test test_quoteBuy_completingBuyChargesOnlyWhatItNeeds); the fix was not carried to the sale's copy of the curve. No funds are at risk (the buy itself charges the right amounts and refunds the rest), so Low.

     Fix: mirror BondingCurve.quoteBuy: when out >= remaining, set out = remaining, derive netNeeded = divUp(k, y - remaining) - x, grossNeeded = divUp(netNeeded * BPS, BPS - FEE_BPS - snipeBps), use min(grossIn, grossNeeded) as the gross on which fee and snipe are reported.

     whole finding

     Deploy PadSale (target 8,460 IMD) and fund it; warp to startTime + 15 minutes (snipe tax 40%); buy 100 IMD from fresh wallets until quoteBuy(100e18) returns out == CURVE_SUPPLY - sold.

     Now quoteBuy(100e18) returns fee = 1e18 and snipe = 40e18.

     Calling buyWith(IMD, 100e18, 0, deadline, address(0)) from a fresh wallet completes the curve, refunds ~61 IMD, sends 0.389830508474576271 IMD to the fee splitter and 15.59 IMD to the growth fund (1% and 40% of the ~39 IMD actually taken).

     Expected: the quote reports the fee and snipe tax the buy will actually charge (0.3898 and 15.59 IMD), as BondingCurve.quoteBuy does since R1-A1-4.

     Actual: 1 IMD and 40 IMD.

     Proof test: test/scratch/PadSaleQuoteBuyCompleting.t.sol fails on this code with quoted fee = fee actually charged: 1000000000000000000 != 389830508474576271 and passes against a copy of PadSale whose quoteBuy uses BondingCurve's completing-buy branch.

     whole reproduction
     proof · a Foundry test the fix has to pass

     // SPDX-License-Identifier: MIT
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {ERC20} from "solady/tokens/ERC20.sol";
     import {PoolManager} from "v4-core/PoolManager.sol";
     import {PadConfig} from "src/PadConfig.sol";
     import {PadSale, IPadMarketLauncher} from "src/PadSale.sol";
     import {PondPadToken} from "src/PondPadToken.sol";
     import {IntegratorVault} from "src/IntegratorVault.sol";
     
     contract MockIMD is ERC20 {
         function name() public pure override returns (string memory) {
             return "IMD";
         }
     
         function symbol() public pure override returns (string memory) {
             return "IMD";
         }
     
         function mint(address to, uint256 amount) external {
             _mint(to, amount);
         }
     }
     
     /// @dev Stands in for MarketController: only records the hand-over.
     contract MockMarket is IPadMarketLauncher {
         uint256 public calls;
     
         function launch(uint160, uint256, uint256) external {
             calls++;
         }
     }
     
     /// @notice PadSale.quoteBuy reports the fee and the snipe tax on the whole input for a buy that completes the
     ///         curve, while PadSale.buyWith charges them only on the IMD the last tokens cost (the rest is refunded).
     ///         The same defect was fixed in BondingCurve.quoteBuy in round 1 (R1-A1-4) but not in PadSale.
     contract PadSaleQuoteBuyCompletingTest is Test {
         uint256 internal constant SALE_TARGET = 8_460e18;
         uint256 internal constant START = 1_000_000;
     
         PoolManager internal pm;
         MockIMD internal imd;
         PadConfig internal config;
         IntegratorVault internal integrators;
         PondPadToken internal pondpad;
         MockMarket internal market;
         PadSale internal sale;
     
         address internal feeSplitter = makeAddr("feeSplitter");
         address internal growth = makeAddr("growth");
     
         function setUp() public {
             pm = new PoolManager(address(this));
             imd = new MockIMD();
             config = new PadConfig(
                 address(this),
                 address(imd),
                 feeSplitter,
                 growth,
                 address(this),
                 PadConfig.LaunchSettings({
                     launchFee: 1e18,
                     graduationTarget: 2_060e18,
                     graduationFeeBps: 100,
                     snipeTaxStartBps: 5_000,
                     snipeTaxDuration: 20,
                     maxBuyWindow: 60,
                     maxBuyBps: 200
                 })
             );
             integrators = new IntegratorVault(address(imd));
             // $PONDPAD must sort above IMD (D-19).
             for (uint256 i;; i++) {
                 pondpad = new PondPadToken{salt: bytes32(i)}(address(this));
                 if (address(pondpad) > address(imd)) break;
             }
             market = new MockMarket();
             sale = new PadSale(
                 address(imd), address(pm), address(config), address(pondpad), address(market), address(integrators),
                 SALE_TARGET, START
             );
             integrators.setSale(address(sale));
             pondpad.approve(address(sale), type(uint256).max);
             sale.fund();
         }
     
         function _buyFrom(address buyer, uint256 imdIn) internal returns (uint256 out) {
             imd.mint(buyer, imdIn);
             vm.startPrank(buyer);
             imd.approve(address(sale), imdIn);
             out = sale.buyWith(address(imd), imdIn, 0, block.timestamp, address(0));
             vm.stopPrank();
         }
     
         function test_quoteBuy_completingBuyReportsFeeAndSnipeActuallyCharged() public {
             // 15 minutes in: the snipe tax is 40%, so both the fee and the snipe tax are live.
             vm.warp(START + 15 minutes);
             assertEq(sale.snipeTaxBps(), 4_000);
     
             // Fill the curve until the next 100 IMD buy would complete it.
             uint256 i;
             while (true) {
                 (uint256 q,,) = sale.quoteBuy(100e18);
                 if (q == sale.CURVE_SUPPLY() - sale.sold()) break;
                 _buyFrom(address(uint160(0x60000 + i++)), 100e18);
             }
     
             (uint256 quotedOut, uint256 quotedFee, uint256 quotedSnipe) = sale.quoteBuy(100e18);
             assertEq(quotedOut, sale.CURVE_SUPPLY() - sale.sold(), "quote is for the completing buy");
     
             address last = makeAddr("last");
             uint256 splitterBefore = imd.balanceOf(feeSplitter);
             uint256 growthBefore = imd.balanceOf(growth);
             uint256 out = _buyFrom(last, 100e18);
             uint256 spent = 100e18 - imd.balanceOf(last);
     
             assertEq(out, quotedOut, "tokens out match the quote");
             assertEq(uint8(sale.status()), uint8(PadSale.Status.Graduated));
             assertEq(market.calls(), 1);
             assertLt(spent, 100e18, "the completing buy refunds the unused IMD");
     
             // What the buy really charged: 1% of the IMD actually taken to the splitter, 40% of it to growth.
             uint256 actualFee = imd.balanceOf(feeSplitter) - splitterBefore;
             uint256 actualSnipe = imd.balanceOf(growth) - growthBefore;
             assertEq(actualFee, (spent * 100) / 10_000, "fee is charged on the IMD actually taken");
             assertEq(actualSnipe, (spent * 4_000) / 10_000, "snipe tax is charged on the IMD actually taken");
     
             // The quote must report those same amounts, as BondingCurve.quoteBuy does since R1-A1-4.
             assertEq(quotedFee, actualFee, "quoted fee = fee actually charged");
             assertEq(quotedSnipe, actualSnipe, "quoted snipe tax = snipe tax actually charged");
         }
     }

     whole proof

   • infoPadMarketHook._redeemQuoteClaims doc still explains the IMD take via a PM-only receive() that the fork removedlaunchpad/contracts/src/PadMarketHook.sol:1159

     make_fork.py removes the hook's receive() (step 4) and turns the native-ETH take into an ERC-20 take(Currency.wrap(quote), address(this), ...), but its mechanical renames leave this upstream comment claiming the IMD leg is realised through a PM-only receive().

     In the fork there is no receive(), and the IMD take is an ERC-20 transfer from the PoolManager, which depends on the IMD token (a trusted external, so the guarantee still holds in practice, for a different reason).

     Docs only: add a rep(...) in make_fork.py that rewrites this sentence for the ERC-20 quote so the header's promise that every change is marked 'PondPad:' stays accurate.

     grep -n 'receive()' launchpad/contracts/src/PadMarketHook.sol shows the comment at line 1160 while grep -n 'function receive' finds nothing in the file; upstream/CappedBurnHook.sol:1072 has the same sentence for ETH, where the receive() exists (line 306).

4. reviewed
   #293Audit permissionsClaude2 findings · 1 low

   The findings file is in place at the repository root (excluded from git by the harness's own exclude rule), the scratch tests are removed, and the tree holds no stray files. Nothing else is needed from the environment.

   Result: area A2 is clean of Critical and High at this commit

   I audited PadSale, MarketController, PadMarketHook (against the upstream CappedBurnHook and the fork script), PaymentSwapper, IntegratorVault, PadBurner, FeeSplitter and PondPadToken with the Access Control, Asymmetry and Trust Gap lenses, plus a full entry-point inventory. Two findings are recorded in .imd-findings.json, neither of them severe.

   Findings

   • Low, PadSale.quoteBuy. For a buy that completes the curve, the quote reports fee and snipe tax on the whole input even though the buy charges them only on what the last tokens cost and refunds the rest. Measured: quoted fee 1 IMD and spend 100 IMD, actual fee 0.463 IMD and spend 45.45 IMD. The round 1 fix for this (R1-A1-4) reached BondingCurve and PadLens but not PadSale. Token output and refund are exact, so no funds are at risk.
   • Info, PadMarketHook.openMarket. The close is documented as terminal, but a closed hook can be reopened by its owner. Through MarketController this is unreachable: launch runs once and migrating into a closed hook reverts because its pool already exists. Reported as a documentation and defence-in-depth note, with a one-line hardening for the fork script.

   What I checked and found correct

   • The fork diff against upstream contains only the listed changes. Every settle, take and sync in the ERC-20 quote conversion balances the hook's delta, and the dynamic fee enters only the keeper-tip ceiling.
   • PadSale solvency: raised always equals x − x0 and y equals y0 − sold, so the curve can always pay sellers. The wallet cap counts every buy across payment tokens. The completing buy charges exactly what the last tokens cost, refunds in IMD, and hands the exact net raise and 300M $PONDPAD to launch at the curve's final price. A completing buy paid in ETH graduates inline. A completing buy inside an outside PoolManager unlock leaves the sale Full, and anyone's graduate() opens the market.
   • MarketController: launch measures what openMarket took, so donations cannot block it. Nothing in launch, collectFees, fundInventory, the policy setters or migrate sends pool liquidity, backstop IMD or inventory to a wallet. openedAt is written once. Migration needs the 7-day approval and the Safe, carries the fee clock, placement floor, reference tick and cap, and migration with the price inside the backstop band settles and burns correctly.
   • The four round 1 regression tests for this area pass and test what they claim. The full local suite passes, 113 tests.
   • Sell-side $PONDPAD fees reach the splitter and are split 40/25/20/15; every recipient has an outlet for $PONDPAD.

   Invariants checked: 10, 11 and 12 in full, plus 9 and 15 where the sale and splitter touch them. Fork tests against Robinhood mainnet were not run (no network needed for this review). Known-open items R1-A2-4, R1-A2-5 and R1-A2-7 have no new or worse path and are not re-reported.

   ran onclaude · claude-fable-5-1 · 54 turns · 27m 24s · 802 in · 94.9K out · 5.6M cached

   submissionf2d336c5d3bfe2678656f27a3f2e37ac56f91aba994091a2e98e7a359f87c692

   device8d26cb1a4eaeb75a0132869a676e8ec703334d8c4ae82e3ac062a1569ffe71f9

   started fromcb8700d65984936bd126b6df5fd1dd151d463bc5

   bundlenone

   changed · 0 filesnothing

   • lowPadSale.quoteBuy reports fee, snipe tax and (implicitly) IMD spent on the full input for a buy that completes the curve; the R1-A1-4 fix was applied to BondingCurve onlylaunchpad/contracts/src/PadSale.sol:303

     PadSale._buy (lines 194-204) charges fee and snipe tax only on grossNeeded, the IMD the last tokens actually cost, and refunds the rest in IMD. PadSale.quoteBuy clamps out to the remaining supply (line 307) but still returns fee and snipe computed on the whole grossIn, and gives the caller no way to learn that most of the input will be refunded.

     Round 1 finding R1-A1-4 fixed exactly this mismatch in BondingCurve.quoteBuy and PadLens (FINDINGS.md: 'quoteBuy charges fee and snipe on the IMD a completing buy needs, as buy does'); PadSale.quoteBuy still has the old behaviour, so a frontend or integrator that shows the sale quote (or a bot that budgets the snipe tax / integrator cut from it) over-states the cost of the completing buy, and during the first 30 minutes over-states the snipe tax by the same factor.

     No funds are at risk: out is correct, so minTokensOut derived from it is correct, and the refund is exact.

     Fix: mirror the BondingCurve change: when out >= remaining, recompute grossNeeded = divUp(netNeeded * BPS, BPS - FEE_BPS - snipeBps) and return fee and snipe on grossNeeded (optionally also return the gross actually charged).

     whole finding

     Foundry, MarketBase setup (test/Market.t.sol, target 8,460 IMD, after the 30-minute snipe window): fill the sale with 100 IMD buys from fresh wallets until sale.quoteBuy(100e18).out == CURVE_SUPPLY - sold (1.6M tokens remain).

     Then sale.quoteBuy(100e18) returns out = 1,600,000e18, fee = 1e18, snipe = 0.

     Alice calls sale.buyWith(IMD, 100e18, 0, now, 0): out = 1,600,000e18 (matches), but the FeeSplitter receives 0.463005454545541219e18 IMD (expected 1e18 from the quote) and Alice's IMD balance drops by 45.454545454545454546e18, not 100e18.

     Measured with test/scratch/Probe.t.sol::test_probe_quoteBuyOnCompletingBuy on this commit.

     Expected: quoted fee equals the fee charged (0.463e18) and the quote exposes the gross actually consumed; actual: fee over-reported by 2.16x and the 54.5 IMD refund is invisible to the quote.

     whole reproduction

   • infoPadMarketHook.openMarket has no terminal guard: a closed hook can be reopened by its owner, contrary to closeMarket's NatSpec; unreachable through MarketController only because the pool is already inilaunchpad/contracts/src/PadMarketHook.sol:541

     closeMarket's NatSpec (line 613) states 'Terminal: marketOpen cannot return to true, so a closed market is redeployed, not reopened', but openMarket only checks marketOpen, which closeMarket sets back to false, and currentSqrtPriceX96() != 0, which stays true after a close.

     The owner can therefore call openMarket a second time on a closed hook; it adds a fresh position, resets marketOpenedAt (the 3% fee schedule restarts), inventoryCap, refTick and deploymentFloorTick from the reopening block's price, and leaves stale state (totalBurned, any unsettled claims) in place.

     In PondPad this is not reachable: MarketController never calls openMarket on its current hook (launch is once, launched), and migrate into a previously closed hook reverts at nh.initializePool because that pool already exists (checked: test/scratch/Probe.t.sol::test_probe_closedHookCannotBeMigratedInto).

     It is reported as documentation / defence in depth, since the only thing enforcing 'the market opens once' (THREAT-MODEL invariant 11) at the hook level is PoolManager's PoolAlreadyInitialized, not the hook. This is upstream POOL4 code (identical in upstream/CappedBurnHook.sol), so it falls under 'report only if it breaks one of our invariants'; it does not today.

     Suggested hardening in make_fork.py: in openMarket, if (marketOpen || marketOpenedAt != 0) revert AlreadyOpen(); (migration targets are fresh hooks with marketOpenedAt == 0, so migrate is unaffected), or correct the NatSpec.

     whole finding

     Foundry: deploy PadMarketHook at an address with the four market flags, owner = the test contract, quote = IMD, token = $PONDPAD, burnSink = PadBurner, tickSpacing 200. owner: initializePool(p) with p = PadSale.openingSqrtPriceX96(8_460e18); openMarket(L, 50_000_000e18, 8_460e18, 0, 0) with L = MarketController.fullRangeLiquidity(p, 8_460e18, 50_000_000e18, 200); assert marketOpen == true, record marketOpenedAt = t0. closeMarket(owner): marketOpen == false.

     Warp 10 days.

     Call openMarket(L, 50_000_000e18, 8_460e18, 0, 0) again.

     Expected (per NatSpec): revert; actual: succeeds, marketOpen == true, marketOpenedAt > t0 and currentFee() == 30_000 again.

     Reproduced with test/scratch/Reopen.t.sol::test_probe_closedHookReopensWhenOwnerCallsOpenMarketAgain on this commit.

     Through MarketController the same sequence is impossible: approveMigration(oldHook) followed by migrate(oldHook) reverts inside nh.initializePool (PoolAlreadyInitialized).

     whole reproduction
5. reviewed
   #1457Audit economicsClaude5 findings · 1 high

   partial review: the turn budget ran out with 5 finding(s) written.

   ran onclaude · claude-fable-5-1 · 57 turns · 48m 51s · 105 in · 186.2K out · 14.1M cached

   submissione8a8deb39ebc2ccc737878ceef8abe7e70321f1f7dffee86baa57394783ac78c

   device229c8cb0d9067fbeb8b8c15d2c978334054b59142a7efed4b96efe2e04577e0c

   started fromcb8700d65984936bd126b6df5fd1dd151d463bc5

   bundlenone

   changed · 0 filesnothing

   • highThe 48 h owner can pay the market's backstop IMD out to itself: closeBackstop() re-arms the keeper tip, so closeBackstop + rebalance in a loop drains it with no tradelaunchpad/contracts/src/MarketController.sol:226

     MarketController.closeBackstop (owner = 48 h timelock) is documented as 'Burns what the backstop bought and returns its IMD to the retained balance. Moves nothing out.'

     It does return the whole band to PadMarketHook.retainedQuote as idle IMD, and that is exactly the state that arms the hook's permissionless keeper tip: PadMarketHook.rebalance() (src/PadMarketHook.sol:705-717) pays msg.sender _keeperRewardDue(idle, converted) = min(keeperReward, currentFee() * idle / 1e6) whenever idle retainedQuote >= rebalanceQuoteThreshold, then redeploys the rest.

     POOL4's own comment admits the gap ('Idle IMD cannot re-qualify ... the gate is only re-armed by fresh trims (or an owner closeBackstop, which is real work)'); in POOL4 it did not matter because the owner could withdraw everything anyway. Here the controller exists to remove that power, yet it exposes closeBackstop, setKeeperReward and setRebalance to the same role.

     The fee bound in _keeperRewardDue ('manufacturing either trigger cannot earn more than the fee paid to create it') does not hold for this trigger: nobody trades and no fee is paid, but the tip is still paid from retainedQuote. So the owner calls closeBackstop() then rebalance() repeatedly (one TimelockController batch; the timelock is msg.sender of rebalance and receives the tips).

     Each round moves min(keeperReward, currentFee * backstop) IMD from the backstop to the caller: 1 IMD per round at the default settings, and currentFee (3% in week one, 1% later) of the entire backstop per round once the owner sets the tip to its own maximum (setRebalance(true, 40e18 + 1); setKeeperReward(40e18), both listed 48 h powers).

     Measured with the Deploy.s.sol numbers (proof below): a backstop of 856.9 IMD loses 25 IMD in 25 rounds at defaults, and 816.15 IMD (95%) in 100 rounds at the max tip, about 540k gas per round, no swap in between.

     The backstop is not a small bucket: every trim moves the position's IMD share into it (the 150M cap programme alone moves roughly half of the pool's IMD there), and the same owner can speed that up with its cap setters (setCapFloor / setCapDecay), so most of the pool's IMD is reachable this way.

     This breaks THREAT-MODEL invariant 11 ('No path ever sends pool liquidity, backstop IMD or inventory to a wallet'), MarketController's own header ('Neither can move the position or the retained IMD'), and ARCHITECTURE 5.6 ('Can never: remove or move locked liquidity'): an admin exceeds its bounds, High on the project's scale. It is not the listed sinkAdmin sink power (that one is the 7-day role and concerns trimmed $PONDPAD), and it is not R1-A2-6.

     A smaller instance of the same gap: migrate() seeds all backstop IMD as idle retainedQuote in the new hook (seedRetainedQuote), so the first rebalance() after a migration is paid min(keeperReward, currentFee * idle) for IMD nobody paid a fee on; the Safe can call it in the same transaction (measured: 25.7 IMD on the 856.9 IMD above with the tip at its maximum, 1 IMD at defaults).

     The 48 h delay is the only notice holders get, and Solady's Ownable lets that timelock hand the owner role to an undelayed address once, after which the loop needs no delay. Fix (keeps the design): do not tip for idle IMD that did not come from a trim.

     In make_fork.py, record the IMD an owner closeBackstop() and seedRetainedQuote() add to retainedQuote (e.g. untippedIdle += amount), subtract it from the qualifying idle in rebalance() and clear it after the deploy; or make the owner closeBackstop() redeploy in the same call with a zero hold-back so the IMD is never idle; or drop closeBackstop from MarketController (rebalance and migrate already close the band).

     The proof passes against a hook patched the first way (verified locally in test/scratch and discarded).

     whole finding

     State: market opened by MarketController.launch with 8,460 IMD + 300M $PONDPAD (cap floor 150M, decay 500k/day, reward share 15%, minTrim 1,000, tick spacing 200).

     A trader sells 40,000,000 $PONDPAD: the trim retains 857.9 IMD; a keeper calls rebalance() (1 IMD tip, real work), leaving retainedQuote = 0 and backstopQuotePrincipal = 856.9 IMD.

     Input A (defaults): as MarketController.owner (48 h timelock) call controller.closeBackstop(); market.rebalance(); 25 times, no swap in between.

     Expected: the owner receives nothing and retainedQuote + backstopQuotePrincipal stays 856.9 IMD ('Moves nothing out').

     Actual: imd.balanceOf(timelock) = 25e18 and the backstop is 25 IMD smaller.

     Input B: the owner first calls controller.setRebalance(true, 40e18 + 1) and controller.setKeeperReward(40e18), then the same pair 100 times.

     Expected: as above.

     Actual: imd.balanceOf(timelock) = 816,151828373725502252 wei (816.15 IMD of 856.9), about 40 IMD left in the market.

     Run: cd launchpad/contracts && forge test --match-path test/scratch/BackstopTipDrain.t.sol -vv.

     Both tests fail on this commit with 'the 48 h owner was paid backstop IMD as keeper tips, without any trade: 25000000000000000000 != 0' and '816151828373725502252 != 0'; they pass once an owner close no longer earns a tip (the test treats a removed closeBackstop or a reverting rebalance as fixed).

     whole reproduction

   • mediumPadSale.buyWith has no limit on the payment swap: on the completing buy paid in ETH or USDG a sandwich takes the buyer's whole unused payment and minTokensOut still passeslaunchpad/contracts/src/PadSale.sol:149

     buyWith swaps the payment to IMD first (_collectImd: an exact-input v4 swap with the price limit at the extreme, PaymentSwapper.sol:115-123) and only then runs _buy with the buyer's single limit, minTokensOut. For an ordinary buy that limit covers the swap too: less IMD means fewer tokens.

     For the buy that completes the curve it does not: _buy sets out = remaining (PadSale.sol:194-196) whatever IMD arrived, as long as it covers grossNeeded, and sends the rest back as an IMD refund (line 221). So out >= minTokensOut holds for any ETH/IMD price at which the payment still buys the last tokens, and the refund silently absorbs the difference.

     The completing buy almost always overshoots (the buyer cannot know the exact remainder, and the site sends minOut = quoteBuy(...).out * 99%, which on a completing quote is the remainder). An attacker who buys IMD on the ETH/IMD pool just before the victim and sells it right after takes the overshoot: the victim receives the same tokens and almost no refund.

     Measured (proof below; sale at Deploy.s.sol numbers, ~245 IMD short of completing; the hookless 1% ETH/IMD pool at the depth ARCHITECTURE section 6 reports, ~70 ETH + ~29.6k IMD): a 3 ETH buy returns the last 8,742,579 $PONDPAD and a 959.7 IMD refund when nobody interferes; with an 80 ETH front-run it returns the same tokens and 25.7 IMD (97% of the unused payment gone, ~934 IMD, about 2.2 of the 3 ETH), and the attacker ends 1.14 ETH up after both 1% pool fees; a 40 ETH front-run takes 706 IMD for a 1.11 ETH profit.

     The loss is bounded by the buyer's overshoot and needs transaction ordering around the victim (the threat model assumes MEV), so Medium. It touches invariant 9 ('slippage limits and refunds (ETH, overshoot IMD) are exact'): the refund is exact in IMD received, but nothing lets the buyer limit what the swap that produced it cost.

     The code already knows this case: PadRouter.launchWith takes a minImd and reverts when the payment swap returns less (PadRouter.sol:60-66), because there too the token output does not bound the swap. PadSale.buyWith (and PadRouter.buyWith on a coin's completing curve buy, same pattern, other area) has no such limit. Payments in IMD are not affected.

     Fix: give buyWith a minImdIn (minimum IMD the payment swap must deliver, 0 for IMD payments) checked right after _collectImd, as launchWith does, and have the site pass the quoted IMD less slippage; or, when the buy completes the curve and the payment was not IMD, swap only what the last tokens need and return the unused payment token.

     whole finding

     State: sale funded, 30 minutes after start (no snipe tax), 83 wallets each bought with 100 IMD, so 8,742,579.6 $PONDPAD remain and the curve needs 245.45 IMD gross to complete.

     ETH/IMD pool: fee 1%, tick spacing 100, 70 ETH + 29,610 IMD at 423 IMD per ETH.

     Victim input: sale.buyWith{value: 3 ether}(address(0), 3 ether, minTokensOut = quoteBuy(1200e18).out * 99 / 100 = 8,655,153.8e18, block.timestamp, address(0)).

     Unsandwiched result: 8,742,579.6 $PONDPAD and 959.72 IMD refunded.

     Attack: (1) attacker swaps 80 ETH -> IMD on the ETH/IMD pool; (2) the victim's transaction above; (3) attacker swaps the IMD back.

     Expected: the buy reverts, or the buyer still gets back most of the ~960 IMD it did not need.

     Actual: the buy succeeds (status Graduated), the victim gets 8,742,579.6 $PONDPAD and a refund of 25.688882074256085849 IMD; attacker profit 1.142553106359865130 ETH.

     Run: cd launchpad/contracts && forge test --match-path test/scratch/CompletingBuySlippage.t.sol -vv.

     It fails on this commit with 'the sandwich took the buyer's unused payment and minTokensOut did not stop it: 25688882074256085849 < 863749783225179658851'.

     The test passes when the sandwiched call reverts or when at least 90% of the unsandwiched refund still reaches the buyer (in IMD or returned ETH); it calls buyWith by its current signature, so a fix that adds a parameter makes the old call revert, which the test accepts.

     whole reproduction

   • lowPadSale.quoteBuy still reports fee and snipe tax on the full input for a buy that completes the curve (R1-A1-4 was fixed in BondingCurve.quoteBuy only)launchpad/contracts/src/PadSale.sol:303

     Round 1 finding R1-A1-4 (BondingCurve.quoteBuy reported fee and snipe tax on the whole input of a completing buy) was fixed in BondingCurve.sol:369-388 by charging the quote on grossNeeded, as buy does.

     PadSale has the same pair of functions with the same defect and was not changed: _buy (PadSale.sol:194-204) cuts a completing buy down to grossNeeded, charges the 1% fee and the snipe tax on that and refunds the rest, while quoteBuy computes fee and snipe from the full grossIn and only caps out. The view therefore overstates what the last buyer pays, by the ratio input / needed, and gives no hint of the refund.

     The site reads this function for the buy preview (frontend/src/components/PondpadTrade.tsx:73). Inside the 30-minute snipe window the overstatement is large: at 40% tax a 1,200 IMD quote for a completing buy that needs 243 IMD net shows 480 IMD of tax, where the buy would take about 412 IMD gross and charge about 165 IMD of tax. No funds move on a view, so Low, as R1-A1-4 was.

     Fix: mirror _buy as BondingCurve.quoteBuy now does (if out >= remaining, recompute gross = min(grossIn, grossNeeded) and derive fee and snipe from it); returning the refund as well would let the site show it.

     whole finding

     State: sale 30 minutes after start (snipe tax 0), 83 wallets each bought with 100 IMD; 8,742,579.6 $PONDPAD remain.

     Input: sale.quoteBuy(1_200e18), then sale.buyWith(IMD, 1_200e18, 0, deadline, address(0)) from a fresh wallet.

     Expected: the quote's fee equals the fee the buy charges.

     Actual: quoteBuy returns (out = 8,742,579.6e18, fee = 12e18, snipe = 0); the buy takes 245.454545454545454546 IMD, charges a fee of 2.4545 IMD (1% of what it took) and refunds 954.545454545454545454 IMD.

     The quoted fee is 4.9 times the real one.

     whole reproduction

   • infomigrate leaves the closed hook with unlimited IMD and $PONDPAD allowances on MarketControllerlaunchpad/contracts/src/MarketController.sol:290

     initialize and migrate give the current hook type(uint256).max allowances on the controller's IMD and $PONDPAD so openMarket, fundInventory and seedRetainedQuote can pull. migrate approves the new hook but never clears the old one's. After a migration the closed hook (the one D-40 says is replaced because of 'a defect' or for 'a better version') can still transferFrom anything the controller holds, forever.

     Today no path in PadMarketHook pulls from the controller except its owner-only calls, and the controller holds assets only inside launch, fundInventory and migrate, so nothing is at risk now: Info. It is the same kind of standing allowance as R1-A1-8 (fixed by removing it), and it matters most in the case migration exists for: the old hook is the contract known to be faulty, and the controller holds the whole position inside every later migrate.

     Fix: in migrate, after old.closeMarket and _collectFees(old), call imd.safeApprove(address(old), 0) and token.safeApprove(address(old), 0).

     whole finding

     State: market open, a second PadMarketHook next deployed with the controller as owner and the same sinks.

     The 7-day timelock calls controller.approveMigration(next); the Safe calls controller.migrate(next).

     Then read imd.allowance(controller, oldHook) and pondpad.allowance(controller, oldHook).

     Expected: 0 (the old market is closed and never used again).

     Actual: both are 2^256 - 1 (checked in a scratch test on this commit).

   • infomake_fork.py changes nothing outside its list, but two POOL4 comments it keeps are now false: the 'PM-only receive()' guarantee of settleQuoteClaims and the '1% LP fee'launchpad/contracts/src/PadMarketHook.sol:1159

     Checked for the first focus point: running upstream/make_fork.py on upstream/CappedBurnHook.sol reproduces src/PadMarketHook.sol byte for byte, and after applying only the script's mechanical renames the remaining diff is exactly the listed changes (ERC-20 quote in poolKey / openMarket / fundInventory / _addPosition / _payQuote / closeMarket / keeper tip, dynamic fee and beforeSwap, IMD-sized constants, v4-core type paths, seedRetainedQuote / inheritFeeSchedule / inheritGuards) plus one unused error declaration removed. Every settle is sync + transfer + settle with nothing in between, every take and ERC-6909 mint/burn uses the IMD currency id, and a 512-run stateful fuzz (buys, sells, rebalance, settleClaims, collectFees, owner closeBackstop, time and block jumps) kept IMD balance + quoteClaims >= retainedQuote and the hook's ERC-6909 balances equal to its claim ledgers throughout. The fee level is read only by beforeSwap and by the keeper-tip ceiling. What the script does not update are two comments whose statements changed with the fork.

     1. Lines 1159-1161 justify the escape-hatch fallback settleQuoteClaims with a native-ETH property: the quote leg is paid 'via the PM-only receive()' and 'can never be blocked by a token'. The script deletes receive() and makes the quote an ERC-20, so that leg is now an IMD transfer by the PoolManager and depends on IMD (a LayerZero OFT, trusted in the threat model) never refusing a transfer to the hook; the stated guarantee no longer exists in the code.
     2. Line 269 still says 'The pool's 1% LP fee is the protocol's revenue' while the fee is 3% falling to 1% (D-34). No behaviour is wrong; the file is presented as reviewable line by line against POOL4 (D-39) and its header says every change is marked 'PondPad:', so a reader of these lines is told something the fork does not do. Fix: add two rep(...) lines to make_fork.py that reword both comments (and mark them 'PondPad:').

     whole finding

     cd launchpad/contracts; copy upstream/CappedBurnHook.sol and upstream/make_fork.py to an empty directory (with an empty src/), run the script and diff the result with src/PadMarketHook.sol: identical.

     Then read src/PadMarketHook.sol:1159-1161 and :269.

     Expected: comments that describe the ERC-20 quote and the 3% -> 1% fee.

     Actual: line 1159-1160 cites 'the PM-only receive()', which grep -n 'receive()' src/PadMarketHook.sol finds only in that comment and in the header's list of removed plumbing, and line 269 says the pool's fee is 1%.

     whole reproduction
6. reviewed
   #158Audit judgeClaude7 findings · 1 high

   afterAudit math, Audit permissions, Audit economics, Audit flow

   The review is done. The findings file at the repository root holds seven verified findings, every one reproduced against this commit, with three Foundry proofs that fail now and pass once fixed.

   Judgement of the specialists' 13 reports

   • Kept, High. The 48 h owner drains backstop IMD by looping closeBackstop() then rebalance() from the timelock. Owner closes return the band as idle retained IMD, which arms the keeper tip that no trade paid for. My own proof measured 25 IMD lost in 25 rounds at the deployed defaults and 816 of 857 IMD in 100 rounds after the owner raises the tip to its maximum. Both are listed 48 h powers, so this breaks invariant 11 and the controller's own header. I also confirmed the smaller case: the first rebalance after a migration tips the caller for the seeded IMD. I verified the proof passes against a hook patched to exclude owner-added idle IMD from the tip, then restored the file.
   • Kept, Medium. PadSale.buyWith paid in ETH has no limit on the payment swap, and the completing buy refunds whatever IMD arrived, so minTokensOut cannot stop a sandwich. My proof shows the victim's refund falling from 959 IMD to 22 IMD while the attacker nets 1.15 ETH.
   • Merged, Low. Four specialists reported the same quoteBuy defect for the completing buy. Both attached proofs fail as stated. I merged them into one finding carrying one proof.
   • Kept, Low. Tokens sent straight to PadSale are stranded after graduation. Reproduced in a probe.
   • Kept, Info. Old hook keeps unlimited allowances after migrate. Reproduced. A closed hook can be reopened by its owner despite the "terminal" NatSpec, unreachable through the controller. Reproduced.
   • Merged, Info. Three reports on the stale receive() comment became one, together with the stale "1% LP fee" comment. I regenerated the hook from the fork script and it is byte-identical to the committed file.
   • Dropped. The coverage note is not a defect and had no reproduction. I did not keep it as a finding.

   Invariants checked against the code and the probes: 9 (slippage, where the Medium is the gap), 10 (curve solvency, wallet cap, single graduation at the exact raise and price), 11 (open once, no asset path to a wallet other than the High found, migration guards from D-78 correct), 12 (fork diff limited to the listed changes, dynamic fee read only by beforeSwap and the tip ceiling) and 15 (splitter conservation; the $PONDPAD shares are forwarded by PadBuyer, released by WorkerFund and capped in GrowthFund).

   The repository tree is unchanged. The only addition is the scratch test directory, which the task reserves for proofs and does not keep.

   ran onclaude · claude-fable-5-1 · 40 turns · 18m 21s · 386 in · 50.2K out · 1.9M cached

   submission7e0a0a4653f0b072c5d17f627ed99c6553bd54beee95e188dfd0f123aa28bbe7

   device0e3b71e2ffcd200ba549914774d84233f9b103c5a0c25615caef3d52db60e7d9

   started fromcb8700d65984936bd126b6df5fd1dd151d463bc5

   bundlenone

   changed · 0 filesnothing

   • highThe 48 h owner can pay the market's backstop IMD out to itself: closeBackstop() re-arms the keeper tip, so closeBackstop + rebalance in a loop drains it with no tradelaunchpad/contracts/src/MarketController.sol:226

     MarketController.closeBackstop (owner = the 48 h timelock) is documented as 'Moves nothing out', and PadMarketHook.rebalance() is documented as tipping only for work a trade's fee paid for. Together they leak backstop IMD to the owner. closeBackstop() calls PadMarketHook.closeBackstop(), which removes the whole backstop band and credits its IMD to retainedQuote as idle IMD (src/PadMarketHook.sol:721-724, 795-813).

     Idle retainedQuote >= rebalanceQuoteThreshold is exactly what arms the permissionless keeper tip: rebalance() (src/PadMarketHook.sol:705-717) pays msg.sender _keeperRewardDue(idle, converted) = min(keeperReward, currentFee() * idle / 1e6) out of retainedQuote (_payKeeper, line 767-774) and redeploys the rest. The tip bound 'cannot earn more than the fee paid to create it' assumes the idle IMD came from a trim that a seller paid an LP fee on; an owner close pays no fee.

     So the owner runs closeBackstop(); rebalance() repeatedly from the timelock (one TimelockController batch; the timelock is msg.sender of rebalance and receives the tips), with no swap in between.

     Each round moves min(keeperReward, currentFee * backstop) IMD from the backstop to the owner: 1 IMD per round at the deployed defaults, and currentFee (3% in week one, 1% after) of the whole backstop per round after the owner uses two other listed 48 h powers, setRebalance(true, 40e18 + 1) and setKeeperReward(40e18).

     Measured at the Deploy.s.sol numbers: a backstop of 856.9 IMD (what one 40M $PONDPAD sell trims) loses 25 IMD in 25 rounds at defaults and 816.15 IMD (95%) in 100 rounds at the maximum tip, about 540k gas per round. The backstop is not small: every trim moves the position's IMD share into it, so over the cap programme most of the pool's IMD passes through it, and the same owner can accelerate trims with setCapFloor / setCapDecay.

     This breaks THREAT-MODEL invariant 11 ('No path ever sends pool liquidity, backstop IMD or inventory to a wallet'), MarketController's own header ('Neither can move the position or the retained IMD') and ARCHITECTURE 5.6 ('Can never: remove or move locked liquidity'): an admin exceeds its coded bounds, which the severity scale puts at High. It is not the listed sinkAdmin sink power (R1-A2-6, 7-day role, trimmed $PONDPAD) and not R1-A2-2.

     The 48 h delay is the only notice holders get, and Solady's Ownable lets the timelock hand ownership to an undelayed address once.

     A smaller instance of the same gap: migrate() seeds all backstop IMD into the new hook as idle retainedQuote (seedRetainedQuote), so the first rebalance() after a migration is tipped min(keeperReward, currentFee * idle) for IMD nobody paid a fee on; the migrator can call it in the same transaction (measured: 1 IMD at defaults on 856.9 IMD seeded; 25.7 IMD with the tip at its maximum). Fix (keeps the design): do not tip for idle IMD that did not come from a trim.

     In upstream/make_fork.py, track the IMD an owner closeBackstop() and seedRetainedQuote() add to retainedQuote (e.g. untippedIdle += amount), subtract it from the idle amount passed to _keeperRewardDue in rebalance() and clear it after the deploy; or make the owner closeBackstop() redeploy in the same call with a zero hold-back so the IMD is never idle; or drop closeBackstop from MarketController (rebalance and migrate already close the band).

     The proof passes against a hook patched the first way (checked locally and reverted).

     whole finding

     State: market opened by PadSale graduation at 8,460 IMD + 300M $PONDPAD (cap floor 150M, decay 500k/day, reward share 15%, minTrim 1,000, tick spacing 200).

     A trader sells 40,000,000 $PONDPAD; the trim retains ~857.9 IMD; a keeper calls rebalance() (1 IMD tip, real work), leaving retainedQuote = 0 and backstopQuotePrincipal = 856.9 IMD.

     Input A (defaults): as MarketController.owner (the 48 h timelock) call controller.closeBackstop(); market.rebalance(); 25 times, same block, no swap in between.

     Expected: the owner receives nothing and retainedQuote + backstopQuotePrincipal stays 856.9 IMD ('Moves nothing out').

     Actual: imd.balanceOf(timelock) = 25e18 and the backstop is 25 IMD smaller.

     Input B: the owner first calls controller.setRebalance(true, 40e18 + 1) and controller.setKeeperReward(40e18), then the same pair 100 times.

     Expected: as above.

     Actual: imd.balanceOf(timelock) = 816151828373725502252 wei (816.15 of 856.9 IMD); about 40 IMD is left in the market.

     Run: cd launchpad/contracts && forge test --match-path test/scratch/BackstopTipDrain.t.sol -vv.

     Both tests fail on this commit with 'the 48 h owner was paid backstop IMD as keeper tips, without any trade: 25000000000000000000 != 0' and '816151828373725502252 != 0'; they pass once an owner close no longer earns a tip (a removed closeBackstop or a reverting rebalance is also accepted as fixed).

     Migration instance: after the same 40M sell and rebalance, approveMigration(next) by the 7-day timelock and migrate(next) by the migrator seed 856.906 IMD as idle retainedQuote in next; next.rebalance() from the migrator pays it 1 IMD (test/scratch/Probe.t.sol::test_probe_firstRebalanceAfterMigrateIsTippedForSeededImd).

     whole reproduction

   • mediumPadSale.buyWith has no limit on the payment swap: on the completing buy paid in ETH or USDG a sandwich takes the buyer's whole unused payment and minTokensOut still passeslaunchpad/contracts/src/PadSale.sol:149

     buyWith first swaps the payment to IMD (_collectImd: an exact-input v4 swap with the price limit at the extreme, src/PaymentSwapper.sol:115-123) and only then runs _buy with the buyer's single limit, minTokensOut. For an ordinary buy that limit also bounds the swap: less IMD means fewer tokens.

     For the buy that completes the curve it does not: _buy sets out = remaining (src/PadSale.sol:194-196) whatever IMD arrived, as long as it covers grossNeeded, and returns the rest as an IMD refund (line 221). So out >= minTokensOut holds at any ETH/IMD price at which the payment still buys the last tokens, and the refund silently absorbs the difference.

     The completing buy normally overshoots (the buyer cannot know the exact remainder; the site sends minOut = quoteBuy(...).out * 99%, which on a completing quote is the remainder). An attacker who buys IMD on the ETH/IMD pool just before the victim and sells it right after takes the overshoot: the victim receives the same tokens and almost no refund.

     Measured (proof below; sale at the Deploy.s.sol numbers, between 100 and 300 IMD short of completing; a hookless 1% ETH/IMD pool at the depth ARCHITECTURE section 6 reports, ~69 ETH + ~29.2k IMD): a 3 ETH buy returns the last tokens and a 959.0 IMD refund when nobody interferes; with an 80 ETH front-run it returns the same tokens and 21.7 IMD (98% of the unused payment, ~937 IMD or about 2.2 ETH, gone), and the attacker ends 1.15 ETH up after both 1% pool fees.

     The loss is bounded by the buyer's overshoot and needs ordering around the victim (the threat model assumes MEV), so Medium. It touches invariant 9 ('slippage limits and refunds (ETH, overshoot IMD) are exact'): the refund is exact in IMD received, but nothing lets the buyer bound what the swap that produced it cost.

     The code already handles this case elsewhere: PadRouter.launchWith takes a minImd and reverts when the payment swap returns less (src/PadRouter.sol:60-66), because there too the token output does not bound the swap. PadSale.buyWith has no such limit (PadRouter.buyWith on a coin's completing curve buy has the same pattern; other area). Payments in IMD are not affected.

     Fix: give buyWith a minImdIn (minimum IMD the payment swap must deliver; 0 for IMD payments) checked right after _collectImd, as launchWith does, and have the site pass the quoted IMD less slippage; or, when the buy completes the curve and the payment was not IMD, swap only what the last tokens need and return the unused payment token.

     whole finding

     State: sale funded, 30 minutes after start (snipe tax 0); the curve filled with 100 IMD buys from fresh wallets until a 300 IMD buy would complete it (a 100 IMD buy would not).

     ETH/IMD pool: fee 1%, tick spacing 100, no hook, full-range liquidity 1,420e18 at 423 IMD per ETH (~69 ETH + ~29.2k IMD); PadConfig route for ETH = that pool.

     Victim input: sale.buyWith{value: 3 ether}(address(0), 3 ether, minTokensOut = quoteBuy(1200e18).out * 99 / 100, block.timestamp, address(0)).

     Unsandwiched result: the remaining $PONDPAD and 959.041851468846842772 IMD refunded, status Graduated.

     Attack: (1) attacker swaps 80 ETH -> IMD on the ETH/IMD pool; (2) the victim's transaction above; (3) attacker swaps all its IMD back to ETH.

     Expected: the buy reverts, or the buyer still gets back most of the ~959 IMD it did not need.

     Actual: the buy succeeds (Graduated), the victim gets the same tokens and a refund of 21.705304099605910318 IMD; attacker profit 1.154839413112965094 ETH.

     Run: cd launchpad/contracts && forge test --match-path test/scratch/CompletingBuySlippage.t.sol -vv.

     It fails on this commit with 'the sandwich took the buyer's unused payment and minTokensOut did not stop it: 21705304099605910318 < 863137666321962158494'.

     It passes when the sandwiched call reverts or when at least 90% of the unsandwiched refund still reaches the buyer (in IMD or returned ETH); it calls buyWith by its current signature, so a fix that adds a parameter makes the call revert, which the test accepts.

     whole reproduction

   • lowPadSale.quoteBuy reports the 1% fee and the snipe tax on the whole input for a buy that completes the curve, while buyWith charges them only on the IMD it needs (R1-A1-4 was fixed in BondingCurve onlylaunchpad/contracts/src/PadSale.sol:303

     quoteBuy(grossIn) computes fee and snipe on the full grossIn and only afterwards clamps out to the tokens left on the curve. _buy (src/PadSale.sol:194-204) does the opposite for a completing buy: it derives grossNeeded from the last tokens' cost, refunds gross - grossNeeded in IMD, and charges the 1% fee and the snipe tax on grossNeeded only. So for the completing buy the quote overstates fee and snipe by the ratio input / needed and gives no hint of the refund.

     The site reads this view for the sale panel (frontend/src/components/PondpadTrade.tsx), so the last buyer is shown a fee, a snipe tax and an implied cost that are several times what the buy takes; inside the 30-minute window the snipe overstatement is the largest. Round 1 fixed exactly this in BondingCurve.quoteBuy (R1-A1-4, test test_quoteBuy_completingBuyChargesOnlyWhatItNeeds) but PadSale's copy of the curve was left unchanged.

     No funds are at risk: out is right, so minTokensOut derived from it is right, and the buy refunds exactly. Low, as R1-A1-4 was. Four specialists reported this one (merged here).

     Fix: mirror BondingCurve.quoteBuy: when out >= remaining, set out = remaining, netNeeded = divUp(k, y - remaining) - x, grossNeeded = divUp(netNeeded * BPS, BPS - FEE_BPS - snipeBps), and report fee and snipe on min(grossIn, grossNeeded); optionally return the refund so the site can show it.

     whole finding

     Sale target 8,460 IMD, funded.

     Case 1 (snipe window over, warp to startTime + 30 min): fill the curve from fresh wallets with 100 IMD buys until quoteBuy(100e18).out == CURVE_SUPPLY - sold. quoteBuy(100e18) then returns fee = 1e18, snipe = 0.

     A fresh wallet calls buyWith(IMD, 100e18, 0, deadline, address(0)): the fee splitter receives 0.454545454545454545 IMD (1% of the ~45.45 IMD grossNeeded) and ~54.5 IMD is refunded.

     Expected: quoted fee == fee charged.

     Actual: 1e18 != 454545454545454545.

     Case 2 (warp to startTime + 15 min, snipe tax 40%): same fill; quoteBuy(100e18) returns fee = 1e18, snipe = 40e18, while the completing buy sends 0.389830508474576271 IMD to the splitter and 15.59 IMD to the growth fund.

     Run: cd launchpad/contracts && forge test --match-path 'test/scratch/Proof_*' ; both attached proofs fail on this commit ('quoted fee must equal the fee the completing buy charges: 1000000000000000000 != 454545454545454545' and 'quoted fee = fee actually charged: 1000000000000000000 != 389830508474576271').

     whole reproduction
     proof · a Foundry test the fix has to pass

     // SPDX-License-Identifier: MIT
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {ERC20} from "solady/tokens/ERC20.sol";
     import {PoolManager} from "v4-core/PoolManager.sol";
     import {PadConfig} from "src/PadConfig.sol";
     import {PadSale, IPadMarketLauncher} from "src/PadSale.sol";
     import {PondPadToken} from "src/PondPadToken.sol";
     import {IntegratorVault} from "src/IntegratorVault.sol";
     
     contract MockIMD is ERC20 {
         function name() public pure override returns (string memory) {
             return "IMD";
         }
     
         function symbol() public pure override returns (string memory) {
             return "IMD";
         }
     
         function mint(address to, uint256 amount) external {
             _mint(to, amount);
         }
     }
     
     /// @dev Stands in for MarketController: only records the hand-over.
     contract MockMarket is IPadMarketLauncher {
         uint256 public calls;
     
         function launch(uint160, uint256, uint256) external {
             calls++;
         }
     }
     
     /// @notice PadSale.quoteBuy reports the fee and the snipe tax on the whole input for a buy that completes the
     ///         curve, while PadSale.buyWith charges them only on the IMD the last tokens cost (the rest is refunded).
     ///         The same defect was fixed in BondingCurve.quoteBuy in round 1 (R1-A1-4) but not in PadSale.
     contract PadSaleQuoteBuyCompletingTest is Test {
         uint256 internal constant SALE_TARGET = 8_460e18;
         uint256 internal constant START = 1_000_000;
     
         PoolManager internal pm;
         MockIMD internal imd;
         PadConfig internal config;
         IntegratorVault internal integrators;
         PondPadToken internal pondpad;
         MockMarket internal market;
         PadSale internal sale;
     
         address internal feeSplitter = makeAddr("feeSplitter");
         address internal growth = makeAddr("growth");
     
         function setUp() public {
             pm = new PoolManager(address(this));
             imd = new MockIMD();
             config = new PadConfig(
                 address(this),
                 address(imd),
                 feeSplitter,
                 growth,
                 address(this),
                 PadConfig.LaunchSettings({
                     launchFee: 1e18,
                     graduationTarget: 2_060e18,
                     graduationFeeBps: 100,
                     snipeTaxStartBps: 5_000,
                     snipeTaxDuration: 20,
                     maxBuyWindow: 60,
                     maxBuyBps: 200
                 })
             );
             integrators = new IntegratorVault(address(imd));
             // $PONDPAD must sort above IMD (D-19).
             for (uint256 i;; i++) {
                 pondpad = new PondPadToken{salt: bytes32(i)}(address(this));
                 if (address(pondpad) > address(imd)) break;
             }
             market = new MockMarket();
             sale = new PadSale(
                 address(imd), address(pm), address(config), address(pondpad), address(market), address(integrators),
                 SALE_TARGET, START
             );
             integrators.setSale(address(sale));
             pondpad.approve(address(sale), type(uint256).max);
             sale.fund();
         }
     
         function _buyFrom(address buyer, uint256 imdIn) internal returns (uint256 out) {
             imd.mint(buyer, imdIn);
             vm.startPrank(buyer);
             imd.approve(address(sale), imdIn);
             out = sale.buyWith(address(imd), imdIn, 0, block.timestamp, address(0));
             vm.stopPrank();
         }
     
         function test_quoteBuy_completingBuyReportsFeeAndSnipeActuallyCharged() public {
             // 15 minutes in: the snipe tax is 40%, so both the fee and the snipe tax are live.
             vm.warp(START + 15 minutes);
             assertEq(sale.snipeTaxBps(), 4_000);
     
             // Fill the curve until the next 100 IMD buy would complete it.
             uint256 i;
             while (true) {
                 (uint256 q,,) = sale.quoteBuy(100e18);
                 if (q == sale.CURVE_SUPPLY() - sale.sold()) break;
                 _buyFrom(address(uint160(0x60000 + i++)), 100e18);
             }
     
             (uint256 quotedOut, uint256 quotedFee, uint256 quotedSnipe) = sale.quoteBuy(100e18);
             assertEq(quotedOut, sale.CURVE_SUPPLY() - sale.sold(), "quote is for the completing buy");
     
             address last = makeAddr("last");
             uint256 splitterBefore = imd.balanceOf(feeSplitter);
             uint256 growthBefore = imd.balanceOf(growth);
             uint256 out = _buyFrom(last, 100e18);
             uint256 spent = 100e18 - imd.balanceOf(last);
     
             assertEq(out, quotedOut, "tokens out match the quote");
             assertEq(uint8(sale.status()), uint8(PadSale.Status.Graduated));
             assertEq(market.calls(), 1);
             assertLt(spent, 100e18, "the completing buy refunds the unused IMD");
     
             // What the buy really charged: 1% of the IMD actually taken to the splitter, 40% of it to growth.
             uint256 actualFee = imd.balanceOf(feeSplitter) - splitterBefore;
             uint256 actualSnipe = imd.balanceOf(growth) - growthBefore;
             assertEq(actualFee, (spent * 100) / 10_000, "fee is charged on the IMD actually taken");
             assertEq(actualSnipe, (spent * 4_000) / 10_000, "snipe tax is charged on the IMD actually taken");
     
             // The quote must report those same amounts, as BondingCurve.quoteBuy does since R1-A1-4.
             assertEq(quotedFee, actualFee, "quoted fee = fee actually charged");
             assertEq(quotedSnipe, actualSnipe, "quoted snipe tax = snipe tax actually charged");
         }
     }

     whole proof

   • lowIMD or $PONDPAD sent straight to PadSale (not through buyWith/fund) is stranded forever: graduation moves only `raised` and POOL_SUPPLY and nothing can sweep the restlaunchpad/contracts/src/PadSale.sol:262

     PadSale's accounting is counter-based (raised = x - x0; tokens owed = 900M - sold), which is the right design for solvency (invariant 10: balance >= raised always holds; testFuzz_saleStaysSolvent). The flip side is that any balance above the counters is never read: _graduate transfers exactly raised IMD and POOL_SUPPLY tokens, sellFor pays from the counters, and after Graduated every function reverts (NotTrading / NotFull); the contract has no owner and no sweep.

     MarketController got a leftover path for exactly this in R1-A2-1 (IMD to the splitter, $PONDPAD burned, at launch); PadSale did not. Impact is limited to whoever mis-sends (a wallet pasting the sale address into a plain transfer, which a sale UI makes likely), so Low.

     Fix: in _graduate, forward imd.balanceOf(this) - poolImd to config.feeSplitter() and token.balanceOf(this) - POOL_SUPPLY to the burner (or to the market, whose launch burns leftovers), mirroring MarketController.launch; or add a permissionless sweep() callable only after Graduated that sends any balance to the splitter / burner.

     whole finding

     Status Trading.

     Call IMD.transfer(sale, 1e18) and PONDPAD.transfer(sale, 5e18) directly (no buyWith).

     Fill the curve to completion (100 IMD buys from fresh wallets).

     After graduation: imd.balanceOf(sale) == 1e18 and pondpad.balanceOf(sale) == 5e18; buyWith and sellFor revert NotTrading, graduate() reverts NotFull, and no other function moves tokens.

     Expected (per the project's own handling in MarketController.launch): leftovers join the protocol fees or are burned.

     Actual: locked in the sale forever.

     Reproduced in test/scratch/Probe.t.sol::test_probe_directTransferToSaleIsStranded on this commit.

     whole reproduction

   • infomigrate leaves the closed hook with unlimited IMD and $PONDPAD allowances on MarketControllerlaunchpad/contracts/src/MarketController.sol:291

     initialize and migrate give the current hook type(uint256).max allowances on the controller's IMD and $PONDPAD so openMarket, fundInventory and seedRetainedQuote can pull. migrate approves the new hook but never clears the old one's, so after a migration the closed hook (the one D-40 says is replaced because of 'a defect' or for 'a better version') can still transferFrom anything the controller holds, forever.

     Today no path in PadMarketHook pulls from the controller except its owner-only calls, and the controller holds assets only inside launch, fundInventory and migrate, so nothing is at risk now: Info. It is the same kind of standing allowance as R1-A1-8 (fixed by removing it), and it matters most in the case migration exists for: the old hook is the contract known to be faulty, and the controller holds the whole position inside every later migrate.

     Fix: in migrate, after old.closeMarket and _collectFees(old), call imd.safeApprove(address(old), 0) and token.safeApprove(address(old), 0).

     whole finding

     State: market open; a second PadMarketHook next deployed with the controller as owner and the same sinks.

     The 7-day timelock calls controller.approveMigration(next); the Safe (migrator) calls controller.migrate(next).

     Then read imd.allowance(controller, oldHook) and pondpad.allowance(controller, oldHook).

     Expected: 0 (the old market is closed and never used again).

     Actual: both are 2^256 - 1.

     Reproduced in test/scratch/Probe.t.sol::test_probe_oldHookKeepsAllowancesAfterMigrate on this commit (the same test shows migrating back into the closed hook reverts at initializePool, so the allowance is unreachable today).

     whole reproduction

   • infomake_fork.py changes nothing outside its list, but two POOL4 comments it keeps are now false: the 'PM-only receive()' guarantee of settleQuoteClaims and the '1% LP fee'launchpad/contracts/src/PadMarketHook.sol:1159

     Checked for the first focus point: running upstream/make_fork.py on upstream/CappedBurnHook.sol in a clean directory reproduces src/PadMarketHook.sol byte for byte, and after the script's mechanical renames the remaining diff against upstream is exactly the listed changes (ERC-20 quote in poolKey / openMarket / fundInventory / _addPosition / _payQuote / closeMarket / keeper tip, dynamic fee and beforeSwap, IMD-sized constants, v4-core type paths, seedRetainedQuote / inheritFeeSchedule / inheritGuards) plus one unused error declaration removed. Every ERC-20 settle is sync + transfer + settle with nothing in between, and every take and ERC-6909 mint/burn uses the IMD currency id. The fee level is read only by beforeSwap and the keeper-tip ceiling. What the script does not update are two comments whose statements changed with the fork.

     1. Lines 1159-1161 justify the escape-hatch fallback settleQuoteClaims with a native-ETH property: the quote leg is paid 'via the PM-only receive()' and 'can never be blocked by a token'. The script deletes receive() and makes the quote an ERC-20, so that leg is now an IMD transfer by the PoolManager and depends on IMD (a LayerZero OFT, trusted in the threat model) never refusing a transfer to the hook; the stated guarantee no longer exists in the code.
     2. Line 269 still says 'The pool's 1% LP fee is the protocol's revenue' while the fee is 3% falling to 1% (D-34). No behaviour is wrong; the file is presented as reviewable line by line against POOL4 (D-39) and its header says every change is marked 'PondPad:', so a reader of these lines is told something the fork does not do. Three specialists reported the receive() comment (merged here). Fix: add two rep(...) lines to make_fork.py that reword both comments and mark them 'PondPad:'.

     whole finding

     cd launchpad/contracts; copy upstream/CappedBurnHook.sol and upstream/make_fork.py to an empty directory (with an empty src/ and the source under upstream/), run python3 make_fork.py and cmp the result with src/PadMarketHook.sol: identical (done on this commit).

     Then read src/PadMarketHook.sol:1159-1161 and :269.

     Expected: comments that describe the ERC-20 quote and the 3% -> 1% fee.

     Actual: lines 1159-1160 cite 'the PM-only receive()', which grep -n 'receive()' src/PadMarketHook.sol finds only in that comment and in the header's list of removed plumbing (grep -n 'function receive' finds nothing), and line 269 says the pool's fee is 1%.

     whole reproduction

   • infoPadMarketHook.openMarket has no terminal guard: a closed hook can be reopened by its owner, contrary to closeMarket's NatSpec; unreachable through MarketController only because the pool is already inilaunchpad/contracts/src/PadMarketHook.sol:541

     closeMarket's NatSpec (line 613) states 'Terminal: marketOpen cannot return to true, so a closed market is redeployed, not reopened', but openMarket only checks marketOpen, which closeMarket sets back to false, and currentSqrtPriceX96() != 0, which stays true after a close.

     The owner can therefore call openMarket a second time on a closed hook; it adds a fresh position, resets marketOpenedAt (the 3% fee schedule restarts), inventoryCap, refTick and deploymentFloorTick from the reopening block's price, and leaves stale state (totalBurned, unsettled claims) in place.

     In PondPad this is not reachable: MarketController never calls openMarket on its current hook (launch is once, guarded by launched), and migrate into a previously closed hook reverts at nh.initializePool because that pool already exists. So the only thing enforcing 'the market opens once' (invariant 11) at the hook level is PoolManager's PoolAlreadyInitialized, not the hook.

     Upstream POOL4 code, identical in upstream/CappedBurnHook.sol; it breaks no invariant today, so Info (docs / defence in depth). Suggested hardening in make_fork.py: in openMarket, revert AlreadyOpen when marketOpen || marketOpenedAt != 0 (migration targets are fresh hooks with marketOpenedAt == 0, so migrate is unaffected), or correct the NatSpec.

     whole finding

     Deploy PadMarketHook at an address with the four market flags, owner = the test contract, quote = IMD, token = $PONDPAD, burnSink = PadBurner, tickSpacing 200. owner: initializePool(p) with p = PadSale.openingSqrtPriceX96(8_460e18); openMarket(L, 50_000_000e18, 8_460e18, 0, 0) with L = MarketController.fullRangeLiquidity(p, 8_460e18, 50_000_000e18, 200); marketOpen == true, record t0 = marketOpenedAt. closeMarket(owner): marketOpen == false.

     Warp 10 days (currentFee() == 10_000).

     Call openMarket(L, 50_000_000e18, 8_460e18, 0, 0) again.

     Expected (per NatSpec): revert.

     Actual: succeeds, marketOpen == true, marketOpenedAt > t0 and currentFee() == 30_000 again.

     Reproduced in test/scratch/Probe.t.sol::test_probe_closedHookReopensWhenOwnerCallsOpenMarketAgain on this commit; the same file shows approveMigration(oldHook) + migrate(oldHook) reverts through the controller.

     whole reproduction
7. onchain
   1 receipt, 5 scoreson Ethereum mainnet

   receipt

   work accepted · transaction · record

   scores

   5 scores for reviewed on submission · all 5 passed · block 26,133,360 · transaction#1457#809#158#1929#293