Four agents audited the code as it is at 85b8ccb, 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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3 medium3 low2 info

• 1.mediumIn-bounds gas settings let a direct-path redeem exceed 28,000,000 gas (merged: permissions, economics, flow)src/BaskVault.sol:456

                  || s[15] > 28_000_000 / (s[12] + s[13] + 60_000)

  The two gas rules in _validateSetting budget 60,000 gas of overhead per funded asset and nothing for fixed costs. On the direct path a leg whose payment fails costs about 59,000 gas on top of the two stipends (cold token account and three cold slots, managed SSTORE, owed and totalOwed zero-to-nonzero at 22,100 each, encode and self-call base, mulDiv), which leaves about 1,000 gas of slack per leg.

  The fixed costs are not covered: 21,000 intrinsic, calldata for a minimum array sized to the registry (about 45,000 for 350 entries), the fee transfer to a fresh recipient (22,100), the burn, the bitmap scan and the Redeem event, plus about 250 gas for every unfunded registry entry the loop still visits.

  When the owner picks a combination whose product is exactly 28,000,000 and directLimit is roughly 100 or less, the measured transaction exceeds the limit the brief requires on both paths.

  Two in-bounds examples both fail: BalanceGas 20,000 / PayGas 480,000 / DirectLimit 50 / MaxAssets 350 measures 28,107,400, and at the default BalanceGas 50,000 with PayGas 450,000 / DirectLimit 50 / MaxAssets 254 it measures 28,039,556 (both including intrinsic and calldata gas; execution gas alone is also above 28,000,000 in the first case).

  The project's own closest corner (PayGas 500,000 / DirectLimit 48, 160,000 of rule slack) passes at 27,978,671, so the suite does not see this; the booked path (maxAssets rule) cannot be pushed over because its per-leg slack is about 4,000 gas and the registry cannot be small enough for the fixed costs to matter.

  Impact: under a chain gas limit near 28,000,000 a holder facing 50 upgraded gas-burning Stock Tokens cannot redeem until the owner changes settings two days later, which breaks the brief's first invariant. The two specialists who measured only the project's corner (21,000 and 12,000 of margin) are consistent with this: zero-slack neighbours of that corner go over.

  Fix (keeps the documented defaults valid): add the fixed and per-entry terms to both rules, for example require s[15] * (s[12] + s[13] + 60_000) + s[14] * 300 + 250_000 <= 28_000_000 and s[14] * (s[12] + 60_000) + 250_000 <= 28_000_000 (defaults give 9.3M and 27.75M), or raise the 60,000 overhead constant to about 70,000. Either change tightens the spec's stated rule slightly and needs the requester's agreement.

  whole finding

  Proposals accepted by _validateSetting: BalanceGas 20,000; MaxAssets 350; PayGas 480,000; DirectLimit 50 (50 * 560,000 == 28,000,000).

  Genesis-list 350 tokens with feeds and no pools, fund 50 with 1e18 each in one deposit, set a fresh fee recipient by proposal.

  Make the 50 funded tokens spin away their balanceOf stipend and hit invalid() in transfer.

  Cold-call redeem(allShares, self, new uint256, now) with 30,000,000 gas.

  Expected: total gas (execution + 21,000 + calldata) below 28,000,000.

  Actual (forge 1.8.3, solc 0.8.26, via_ir, cancun): 28,107,400; every leg is booked, so the call only succeeds because 30M was supplied.

  Variant at the default BalanceGas: MaxAssets 254, PayGas 450,000, DirectLimit 50, 254 listed / 50 funded: 28,039,556.

  The attached proof is the first case and fails on this tree.

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

  // SPDX-License-Identifier: GPL-2.0-or-later
  pragma solidity 0.8.26;
  
  import {Test} from "forge-std/Test.sol";
  import {BaskVault} from "src/BaskVault.sol";
  
  /// @dev Hostile Stock Token: balanceOf burns its whole stipend, transfer burns its whole stipend.
  contract HostileToken {
      uint8 public constant decimals = 18;
      mapping(address => uint256) internal _balances;
      mapping(address => mapping(address => uint256)) public allowance;
      bool public hostile;
  
      function mint(address to, uint256 value) external {
          _balances[to] += value;
      }
  
      function setHostile(bool h) external {
          hostile = h;
      }
  
      function balanceOf(address account) external view returns (uint256 value) {
          value = _balances[account];
          if (hostile) {
              assembly {
                  for {} gt(gas(), 800) {} {}
              }
          }
      }
  
      function approve(address spender, uint256 amount) external returns (bool) {
          allowance[msg.sender][spender] = amount;
          return true;
      }
  
      function transferFrom(address from, address to, uint256 amount) external returns (bool) {
          allowance[from][msg.sender] -= amount;
          _balances[from] -= amount;
          _balances[to] += amount;
          return true;
      }
  
      function transfer(address, uint256) external view returns (bool) {
          if (hostile) {
              assembly {
                  invalid()
              }
          }
          return true;
      }
  }
  
  contract SimpleFeed {
      uint8 public constant decimals = 8;
      int256 internal answer;
      uint256 internal updatedAt;
  
      constructor(int256 a) {
          answer = a;
          updatedAt = block.timestamp;
      }
  
      function latestRoundData() external view returns (uint80, int256, uint256, uint256, uint80) {
          return (1, answer, updatedAt, updatedAt, 1);
      }
  }
  
  interface VmCold {
      function cool(address target) external;
  }
  
  /// @notice Settings that satisfy both gas rules exactly (50 * (20_000 + 480_000 + 60_000) == 28_000_000)
  /// still let a direct-path redemption over 350 listed / 50 funded hostile assets exceed 28,000,000 gas.
  /// Fails on the current code. Passes once either the settings are rejected or the redemption fits.
  contract RedeemGasBoundProof is Test {
      address internal constant OWNER = 0x30B57ECf51D19ABcED7F6f70974e6fBb6f3b9Da3;
      address internal constant GUARDIAN = 0x5ed39AF86f2C00ad99913B5d727bD68f2A904B68;
      BaskVault internal vault;
      address[] internal tokens;
  
      function setUp() public {
          vm.warp(10 days);
          vault = new BaskVault(OWNER, GUARDIAN);
      }
  
      function _proposeAndExecute(BaskVault.ProposalData memory d) internal returns (bool accepted) {
          vm.prank(OWNER);
          try vault.propose(d) returns (uint256 id) {
              vm.warp(vm.getBlockTimestamp() + 2 days);
              vm.prank(OWNER);
              vault.executeProposal(id);
              accepted = true;
          } catch {
              accepted = false;
          }
      }
  
      function _setting(BaskVault.Setting key, uint256 value) internal returns (bool) {
          BaskVault.ProposalData memory d;
          d.action = BaskVault.Action.SettingChange;
          d.setting = key;
          d.value = value;
          return _proposeAndExecute(d);
      }
  
      function testDirectPathRedeemStaysUnder28MAtInBoundsSettings() public {
          // In-bounds per _validateSetting: 350 * 80_000 == 28_000_000 and 50 * 560_000 == 28_000_000.
          bool ok = _setting(BaskVault.Setting.BalanceGas, 20_000);
          ok = ok && _setting(BaskVault.Setting.MaxAssets, 350);
          ok = ok && _setting(BaskVault.Setting.PayGas, 480_000);
          ok = ok && _setting(BaskVault.Setting.DirectLimit, 50);
          if (!ok) return; // A fix that rejects this combination also satisfies the requirement.
  
          uint256 funded = 50;
          address[] memory selected = new address[](funded);
          uint256[] memory amounts = new uint256[](funded);
          for (uint256 i; i < 350; ++i) {
              HostileToken token = new HostileToken();
              SimpleFeed feed = new SimpleFeed(1e8);
              tokens.push(address(token));
              vm.prank(OWNER);
              vault.genesisList(address(token), address(feed), address(0), address(0), 0);
              if (i < funded) {
                  token.mint(address(this), 1e18);
                  token.approve(address(vault), 1e18);
                  selected[i] = address(token);
                  amounts[i] = 1e18;
              }
          }
          vm.prank(OWNER);
          vault.finalizeGenesis();
          vault.deposit(selected, amounts, address(this), 0, vm.getBlockTimestamp());
  
          BaskVault.ProposalData memory fee;
          fee.action = BaskVault.Action.FeeRecipient;
          fee.target = makeAddr("fee-recipient");
          assertTrue(_proposeAndExecute(fee));
  
          for (uint256 i; i < tokens.length; ++i) {
              if (i < funded) HostileToken(tokens[i]).setHostile(true);
              VmCold(address(vm)).cool(tokens[i]);
          }
          uint256 shares = vault.balanceOf(address(this));
          bytes memory callData =
              abi.encodeCall(vault.redeem, (shares, address(this), new uint256[](tokens.length), vm.getBlockTimestamp()));
          VmCold(address(vm)).cool(address(vault));
          uint256 start = gasleft();
          (bool success,) = address(vault).call{gas: 30_000_000}(callData);
          uint256 used = start - gasleft();
          used += 21_000;
          for (uint256 i; i < callData.length; ++i) {
              used += callData[i] == 0 ? 4 : 16;
          }
          emit log_named_uint("direct-path redeem gas incl. intrinsic", used);
          assertTrue(success, "redeem reverted");
          assertGt(vault.owed(address(this), tokens[0]), 0, "hostile legs must be booked, not paid");
          assertLt(used, 28_000_000, "redeem exceeded 28,000,000 gas at in-bounds settings");
      }
  }

  whole proof

• 2.mediumConfirmed deviation 6: retiring a funded asset that is frozen for good stops every deposit permanently and no owner path resumes them (merged: four specialists)src/BaskVault.sol:663

                  if (managed[token] != 0) return (Reason.RetiredBacking, token, 0, prices);

  The brief says a retired asset is skipped by deposit checks and counts 0 in NAV. The build returns RetiredBacking from _depositContext whenever any retired asset has managed > 0, which blocks deposit, previewDeposit and depositStatus.

  Once an asset has been funded, managed can never return to 0: redeem legs are floor(managed * net / supply) with net < supply because the 1e15 permanent shares never redeem, so at least 1 wei stays (observed 333,333,333,333,334 after every circulating share is redeemed); recognizeLoss writes off only a readable shortfall, which a paused-but-intact balance does not have, and flagDeficit reverts BalanceUnreadable when balanceOf cannot be read; removeAsset needs managed == 0; Feed, Recentre, Reopen, Pool and Resync proposals reject a retired asset in _validateProposal and List rejects a still-registered token.

  The same token blocks deposits before retirement too (OraclePaused at line 601 because hasPause is fixed at listing and no proposal clears it, or Unreadable at line 667), so Retire is the only owner tool for that state and it converts the block into a permanent one.

  A Stock Token paused for good by its issuer, or upgraded so that its balance is unreadable, is an ordinary lifecycle event for one of up to 250 constituents; one such event turns the immutable vault into a redeem-only product forever while redemption and claims keep working. This is worse than the accepted 'retired asset keeps a dust slot', because it is every deposit, and the trigger is a third party (the issuer) rather than an owner choice.

  The owner can mitigate it only by not retiring: a paused token without a pause interface does not block deposits at all.

  Remedies, both a scope decision because they change the sentence 'retired assets are 0 in NAV': (a) value retired backing instead of excluding it: in _depositContext replace the RetiredBacking return with nav += _value(managed[token], a.centre, a.tokenDecimals, a.feedDecimals) (or a frozen price carried in the Retire proposal's value field, timelocked and guardian-cancellable), skipping the live balance, pause, pool and feed checks for retired assets; new depositors then pay for the residual at a fixed price and existing holders are not diluted.

  The attached proof passes under that change (verified against a scratch copy of the vault). (b) A timed, guardian-cancellable write-off action valid only for retired assets that sets managed to 0 and leaves owed untouched; the proof also passes under that remedy. Following the text literally (skip retired, 0 NAV) re-opens the dilution the implementer blocked (a 300e18 deposit paid out 360e18 in the earlier revision) and would fail the proof's second assertion.

  whole finding

  Three 18-decimal tokens listed with 8-decimal feeds at 1e8 and no pools, Alice deposits 100e18 of each (supply 300e18).

  Issuer pauses token0 (oraclePaused() true, transfers revert, balanceOf intact): depositStatus([token1]) = (OraclePaused, token0).

  Owner closes token0, proposes Retire, executes after 2 days: depositStatus([token1]) = (RetiredBacking, token0).

  Alice redeems all 299.999e18 shares: totalSupply = 1e15, managed[token0] = 333,333,333,333,334, her token0 leg is booked as owed and cannot be claimed while paused.

  Then flagDeficit(token0) reverts NoDeficit; removeAsset(token0) reverts InvalidAsset; propose(Feed|Recentre|Reopen|Pool|Resync|List, token0) each revert InvalidAsset; a Resync of token1 after a donation leaves the status unchanged.

  Expected per brief: deposits of token1/token2 continue with token0 at 0 NAV.

  Actual: every deposit reverts DepositUnavailable(16, token0) for the life of the contract.

  Same end state when token0.balanceOf reverts instead (flagDeficit reverts BalanceUnreadable).

  The attached proof fails on this tree at the depositStatus assertion (16 != 0) and passes once retired backing is priced into NAV or written off by a timed action.

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

  // SPDX-License-Identifier: GPL-2.0-or-later
  pragma solidity 0.8.26;
  
  import {Test} from "forge-std/Test.sol";
  import {BaskVault} from "src/BaskVault.sol";
  import {MockToken, MockFeed} from "test/mocks/Mocks.sol";
  
  /// Fails on the current build: after a funded asset whose issuer paused it for good is closed and
  /// retired, every deposit reverts DepositUnavailable(RetiredBacking) and no owner, guardian or
  /// permissionless call can lift it (no shortfall to recognize, removal needs managed == 0, every
  /// asset proposal rejects a retired asset, and the 1e15 permanent shares keep managed above zero).
  /// Passes once deposits resume after such a retirement without letting the new depositor acquire
  /// backing they did not pay for (retired backing priced into NAV, or written off by a timed action).
  contract RetiredBackingDeadlockProof is Test {
      address constant OWNER = 0x30B57ECf51D19ABcED7F6f70974e6fBb6f3b9Da3;
      address constant GUARDIAN = 0x5ed39AF86f2C00ad99913B5d727bD68f2A904B68;
      BaskVault vault;
      MockToken[3] tokens;
      MockFeed[3] feeds;
      address alice = makeAddr("alice");
      address bob = makeAddr("bob");
  
      function setUp() public {
          vm.warp(10 days);
          vault = new BaskVault(OWNER, GUARDIAN);
          for (uint256 i; i < 3; ++i) {
              tokens[i] = new MockToken(18);
              feeds[i] = new MockFeed(8, 1e8);
              vm.prank(OWNER);
              vault.genesisList(address(tokens[i]), address(feeds[i]), address(0), address(0), 0);
              tokens[i].mint(alice, 1_000e18);
              tokens[i].mint(bob, 1_000e18);
              vm.prank(alice);
              tokens[i].approve(address(vault), type(uint256).max);
              vm.prank(bob);
              tokens[i].approve(address(vault), type(uint256).max);
          }
          vm.prank(OWNER);
          vault.finalizeGenesis();
          address[] memory ts = new address[](3);
          uint256[] memory amts = new uint256[](3);
          for (uint256 i; i < 3; ++i) {
              ts[i] = address(tokens[i]);
              amts[i] = 100e18;
          }
          vm.prank(alice);
          vault.deposit(ts, amts, alice, 0, vm.getBlockTimestamp());
      }
  
      function _one(address t) internal pure returns (address[] memory a) {
          a = new address[](1);
          a[0] = t;
      }
  
      function _amt(uint256 x) internal pure returns (uint256[] memory a) {
          a = new uint256[](1);
          a[0] = x;
      }
  
      function _refresh() internal {
          for (uint256 i; i < 3; ++i) feeds[i].set(1e8, vm.getBlockTimestamp());
      }
  
      function testRetiredFrozenAssetMustNotStopDepositsForever() public {
          // Issuer pauses token 0 for good: oraclePaused() == true and transfers revert, balance intact.
          tokens[0].setPause(true);
          (BaskVault.Reason before,) = vault.depositStatus(_one(address(tokens[1])));
          assertEq(uint256(before), uint256(BaskVault.Reason.OraclePaused));
  
          // The only owner tool for this state is close + Retire.
          vm.prank(OWNER);
          vault.closeAsset(address(tokens[0]));
          BaskVault.ProposalData memory d;
          d.action = BaskVault.Action.Retire;
          d.token = address(tokens[0]);
          vm.prank(OWNER);
          uint256 id = vault.propose(d);
          vm.warp(vm.getBlockTimestamp() + 2 days);
          _refresh();
          vm.prank(OWNER);
          vault.executeProposal(id);
          assertTrue(vault.asset(address(tokens[0])).retired);
          assertEq(vault.managed(address(tokens[0])), 100e18);
  
          // Even after every circulating share is redeemed, the permanent shares leave backing behind.
          uint256 all = vault.balanceOf(alice);
          vm.prank(alice);
          vault.redeem(all, alice, new uint256[](0), vm.getBlockTimestamp());
          assertEq(vault.totalSupply(), 1e15);
          assertGt(vault.managed(address(tokens[0])), 0);
          // Alice's token0 leg is booked and unpayable while the token stays paused.
          assertGt(vault.owed(alice, address(tokens[0])), 0);
  
          // Alice refunds the vault so NAV is positive again (deposits need nav > 0 while supply > 0).
          address[] memory ts = new address[](2);
          uint256[] memory amts = new uint256[](2);
          ts[0] = address(tokens[1]);
          ts[1] = address(tokens[2]);
          amts[0] = 100e18;
          amts[1] = 100e18;
          (BaskVault.Reason reason, address fault) = vault.depositStatus(ts);
          emit log_named_uint("depositStatus reason (16 == RetiredBacking)", uint256(reason));
          emit log_named_address("fault", fault);
          assertEq(uint256(reason), uint256(BaskVault.Reason.OK), "deposits are blocked for good");
  
          vm.prank(alice);
          uint256 aliceShares = vault.deposit(ts, amts, alice, 0, vm.getBlockTimestamp());
          assertGt(aliceShares, 0);
  
          // A later depositor must be able to enter, and must not acquire backing for free:
          // the basket value of Bob's legs (healthy tokens at their $1 feeds, the retired token at its
          // $1 centre) may not exceed the $100 he paid.
          vm.prank(bob);
          uint256 shares = vault.deposit(_one(address(tokens[1])), _amt(100e18), bob, 0, vm.getBlockTimestamp());
          vm.prank(bob);
          uint256[] memory legs = vault.redeem(shares, bob, new uint256[](0), vm.getBlockTimestamp());
          uint256 out = legs[0] + legs[1] + legs[2];
          emit log_named_uint("bob basket value out (USD 1e18)", out);
          assertLe(out, 100e18, "new shares acquired backing omitted from their price");
      }
  }

  whole proof

• 3.mediumA pool below the liquidity floor, or one whose observation fails, switches the 3% check off instead of blocking, so moving a thin pool unlocks feed-lag deposits rather than stopping themsrc/BaskVault.sol:607

              if (ok && liquidity >= a.minLiquidity) {

  _price only applies the 3% deviation test when consult succeeds and the harmonic-mean liquidity is at least minLiquidity; otherwise it falls through to line 624 and accepts the feed at face value if it is under NoPoolAge (26 hours). The brief accepts that 'anyone can stop deposits by moving a thin pool' and 'profit from feed lag within the 3% pool deviation'. The actual consequence is the opposite of a stop: in a thin pool anyone can make the pool check disappear for a whole 30-minute window and then deposit against a feed that lags the market by any amount inside the 4x band. Two routes.

  1. Liquidity collapse: a Uniswap v3 pool accumulates secondsPerLiquidityCumulative as delta << 128 / max(liquidity, 1), so one second with zero active liquidity in the window (a swap that pushes the price past every position's range for one block, or the dominant LP pulling its position for one block) makes the harmonic mean about 1,800 regardless of the other 1,799 seconds (computed from the v3 formula with 1e12 liquidity otherwise: 1,799), which is below any sensible minLiquidity.
  2. Observation failure: observe(1800) reverts 'OLD' when the oldest stored observation is younger than 30 minutes; with observation cardinality C, C swaps in C consecutive blocks (sub-second blocks on an Orbit chain) push the oldest observation inside the window, and consult returns ok = false. Either way the depositor buys the token on the market after an after-hours move, deposits it at the stale weekday feed price (fresh enough for the 26-hour rule), and redeems in kind for the whole basket; the gain is the full feed-market gap on an unlimited deposit, paid by existing holders. The pool check is the only market cross-check the design has, and the 'thin pool' acceptance assumed its failure mode is a blocked deposit. Remedy (changes specified behaviour, needs a decision): for a configured pool, treat a failed observation or liquidity under the floor as a blocking reason (for example a new Reason.PoolLiquidity) and reserve the age-only fallback for pool == 0; the owner can still remove a dead pool by proposal. A lighter mitigation is operational: set observation cardinality near the maximum on each pool and prefer pools with full-range liquidity, and keep NoPoolAge short.

  whole finding

  test/scratch/Judge.t.sol testLowLiquidityDisablesDeviationCheck and testObserveRevertDisablesDeviationCheck (both pass on this tree as confirmations).

  Three tokens at $1 with pools, minLiquidity 100, Alice deposits 100e18 of each.

  Pool0 mean tick set to -2231 (market $0.80) with harmonic liquidity 1e12: assetPrice(token0) = PoolDeviation and previewDeposit reverts.

  Same tick with harmonic liquidity 50 (below the floor of 100): assetPrice(token0) = OK; previewDeposit([token0],[100e18]) credits 100e18 USD for tokens worth 80e18 on the market.

  Bob deposits 100e18 token0 (bought for $80), receives 100e18 shares, redeems: legs 50e18 token0, 25e18 token1, 25e18 token2 = $90 at market, a $10 gain taken from Alice with no fee.

  Expected: a divergent pool blocks, as the accepted-risk list assumes.

  With pool0.observe reverting instead, assetPrice(token0) = OK as well.

  whole reproduction

• 4.lowIssuer balance credits waiting for a Resync are captured by whoever deposits in the two-day window (merged: permissions, math, flow)src/BaskVault.sol:396

              uint256 extra = available > managed[d.token] ? available - managed[d.token] : 0;

  Deposit NAV counts only managed at the feed price (line 678) while balance credits from the issuer (a split executed as a balance raise, a dividend paid in tokens, a reissue) enter managed only when the owner executes a Resync at least two days after proposing it.

  In that window, which is public, deposits price BASK below the real backing, and with no waiting period or deposit limit any depositor can enter before executeProposal(Resync) and redeem right after, taking a pro-rata share of the credit from the holders it was meant for; with the fee recipient unset the round trip is free.

  A split that also halves the feed (passing the band and, once the pool converges, the 3% check) understates NAV by the asset's weight times one half for the whole window. The accepted-risk list says such credits 'stay outside managed until a resync'; it does not say new depositors are priced against the understated NAV. Resync itself is correct: it excludes owed tokens and never lowers managed.

  Remedy without a code change: pause deposits (immediate for owner or guardian) before any announced credit and keep them paused until the Resync executes. Code remedy that preserves the design: require depositsPaused in executeProposal for Resync, or credit min(surplus at proposal, surplus at execution). Blocking deposits automatically whenever balance exceeds managed is not advisable because a 1-wei donation would then stop deposits.

  whole finding

  test/scratch/Judge.t.sol testResyncSandwich (passes on this tree as a confirmation).

  Alice deposits 100e18 token0 (managed 100e18, supply 100e18).

  Issuer mints 10e18 to the vault.

  Owner proposes Resync(token0); after 2 days previewDeposit still reports nav 100e18.

  Bob deposits 100e18 token0 and receives 100e18 shares.

  Owner executes: managed = 210e18.

  Bob redeems 100e18 shares and receives 105e18 token0.

  Expected: Alice, the only holder when the credit arrived, receives the 10e18; actual: Bob leaves with 5e18 of it.

  Split variant from the specialists: mint 100e18 to the vault, feed 1e8 to 0.5e8, pool tick near -6932; previewDeposit reports nav 250e18 against a true 300e18 and a 300e18 deposit of token1 mints 360e18 shares.

  whole reproduction

• 5.lowOne wei per asset forces every redemption onto the booked path for good once more than directLimit assets are listedsrc/BaskVault.sol:817

          bool direct = count <= _settings[15];

  The direct-or-booked decision counts assets with nonzero managed (bits in the bitmap), not legs that will pay anything.

  With more than directLimit assets listed, anyone can deposit 1 wei into each other asset (each mints a few shares, so it succeeds) and push the count above directLimit permanently: a 1-wei managed amount gives a leg of floor(1 * net / supply) = 0 on every redemption, so the asset is never un-funded, and recognizeLoss cannot apply because there is no shortfall.

  From then on every redeem, including a single-token redemption of a healthy asset, books all legs as owed and pays nothing, and only the receiver address can collect through claim. A redemption sent to an address that cannot call claim (an exchange deposit address, a contract without a claim path) leaves the tokens in the vault indefinitely because nobody can push the payment.

  The brief frames booking as the consequence of genuinely holding more than directLimit assets; here an unprivileged party switches the mode for a few wei, and at the default limit of 25 any 26 funded entries do so. The owner can raise directLimit only to 77 at the default gas settings, so with 78 or more listed assets the grief cannot be undone.

  Minimal fix that keeps the gas rules: a permissionless claimFor(address creditor, address[] tokens) that pays owed[creditor][token] to the creditor only (same pay sandbox, same min(owed, balance) rule), so a custodial receiver's debt can be pushed to it. A fuller fix decides the direct path per nonzero leg with an attempted-payment counter capped at directLimit, which needs the direct rule restated as maxAssets * (balanceGas + 60,000) + directLimit * payGas <= 28,000,000.

  whole finding

  test/scratch/Judge.t.sol DustGriefTest.testDustFundingForcesBookedRedemptions (passes on this tree as a confirmation).

  26 assets listed with $100 feeds and no pools, defaults (directLimit 25).

  Alice deposits 100e18 of token0.

  Griefer deposits 1 wei of each of tokens 1..25 in one call and receives 2,500 shares.

  Alice calls redeem(shares, custodial, [], deadline): legs[0] = 99,999,989,999,999,999,975 but token0.balanceOf(custodial) == 0 and owed[custodial][token0] == legs[0]; no Payment.

  The griefer then redeems all its shares and managed[token1] is still 1.

  Expected: a healthy single-token redemption is paid directly as before the 25 wei.

  Actual: booked, and collectable only by the custodial address itself.

  whole reproduction

• 6.lowAn absurd positive quote-feed answer makes _price revert with MathOverflow, so deposit, depositStatus, previewDeposit, assetPrice and allAssets revert instead of returning QuoteFeedsrc/BaskVault.sol:615

                      FullMath.mulDiv(quoteAmount, quoteAnswer, 10 ** (uint256(a.quoteDecimals) + a.quoteFeedDecimals));

  The primary feed is bounded by the band before any multiplication, but the quote feed only has to be positive and fresh. quoteAmount carries 18 extra decimals (1e26 for a $100 token against a 6-decimal quote, up to about 3.4e74 at the extreme tick), so FullMath.mulDiv reverts with MathOverflow when quoteAmount * quoteAnswer / 10^(qDec + qfDec) does not fit in 256 bits: a quote feed answering about 1.2e65 or more at a normal tick, or about 3.4e16 at the minimum tick.

  The pool itself cannot cause this (quoteAmount is bounded by TickMath and a realistic quote answer keeps the product far below 2^256), and the primary feed cannot either. Chainlink-style int192 answers cannot reach these values, so it needs a broken or custom quote feed; the impact is loss of the reason codes the brief's item 2 asks for (allAssets reverting hides every asset's status, monitoring sees a bare revert) until a Pool proposal replaces the quote feed two days later.

  Redeem and claim are unaffected. The README's general note that extreme oracle values can make views revert covers this; it is recorded because item 2 asks for it.

  Fix: bound the quote answer before multiplying (for example compute the high word with mulmod as FullMath does and return (Reason.QuoteFeed, token) when it would not fit, or reject quoteAnswer above 10^qfDec * 1e6).

  whole finding

  test/scratch/Judge.t.sol testQuoteFeedOverflowReverts (passes on this tree as a confirmation).

  List an 18-decimal token with an 8-decimal feed at 100e8, pool token/6-decimal quote at mean tick -230271 (pool price 99.99e18), 8-decimal quote feed at 1e8: assetPrice returns OK.

  Set the quote feed to type(int256).max with a fresh timestamp.

  Expected: Reason.QuoteFeed or PoolDeviation with the token as fault.

  Actual: assetPrice, allAssets and depositStatus all revert with FullMath.MathOverflow() (selector 0x9bd9c5bf).

  An answer of 1e52 does not trigger it (returns PoolDeviation).

  whole reproduction

• 7.infoAssets without a usable pool have no 3% bound at all: feed lag up to the 4x band is depositable while the feed is under 26 hours oldsrc/BaskVault.sol:624

          if (block.timestamp - updatedAt > _settings[2]) return (Reason.NoPoolAge, answer, updatedAt, 0);

  This is the specified behaviour for pool == 0 ('a token with no usable pool needs a feed under 26 hours old instead'), recorded so the owner weighs it when listing without a pool.

  Stock feeds update only on weekdays while the tokens trade continuously, so on a weekday evening or Monday morning (feed age under 26 hours) a depositor can buy the token at market, deposit it at the stale feed valuation and redeem the whole basket in kind; the only limits are the band (4x of centre) and the NAV cap, not 3%. The accepted-risk sentence about feed lag mentions the 3% deviation, which does not exist for these assets.

  Mitigations are listing choices: require a pool for every post-genesis listing, or set NoPoolAge well under the overnight gap, or accept and document it.

  test/scratch/Judge.t.sol testNoPoolFeedLagUnbounded (passes on this tree as a confirmation). Remove token0's pool by a Pool proposal with all-zero fields, fund the basket, set feed0 to 1e8 and warp 17 hours while refreshing the other feeds. assetPrice(token0) returns OK and previewDeposit([token0],[100e18]) values the deposit at 100e18 USD whatever the token's market price is at that moment.

• 8.infoPrivileged-power inventory: deposit-side powers are immediate, redeem and claim have none, the guardian cannot escalatesrc/BaskVault.sol:294

      function setDepositsPaused(bool paused) external onlyRole nonReentrant {

  Documentation of trust assumptions, no defect.

  Immediate owner powers: genesisList, finalizeGenesis, transferOwnership (two-step, immediate on accept, cannot target the guardian at either step), setDepositsPaused(false), lowerNAVCap (down to 0, which stops deposits), closeAsset, propose, cancelProposal, executeProposal (owner only; a non-owner gets Unauthorized).

  Guardian: setDepositsPaused(true) only, closeAsset on any asset (also voids pending Reopen proposals), cancelProposal on everything except Action.Guardian.

  Permissionless: deposit, redeem, claim, removeAsset (retired, empty and debt-free only), flagDeficit, recognizeLoss after 7 days, the ERC-20 functions; pay is vault-only. Guardian-to-owner escalation was traced and is closed: transferOwnership and acceptOwnership both reject the guardian, Guardian proposals reject the owner and the pending owner at proposal and at execution, so neither ordering of Guardian(X) and transferOwnership(X) completes.

  A rogue guardian can hold deposits paused or every asset closed only until the owner's Guardian replacement executes (2 days, not cancellable by the guardian).

  Redeem and claim read no feeds, pools or deposit settings other than the gas stipends and directLimit, and no role can pause, retire or remove them out of existence; the managed bitmap and the owed/totalOwed accounting stayed consistent in every sequence traced (deposit, direct and booked redeem, claim, recognizeLoss, removeAsset swap, relisting).

  Minting happens only in deposit (dead shares, fee, receiver) and tokens leave only through pay from redeem and claim; the fee is 0 while feeRecipient is unset and ceil(0.5%) in and out once set. Reentrancy from token callbacks into any state-changing entry point reverts Reentrant, and pay rejects any caller but the vault.

  whole finding

  Guardian calls setDepositsPaused(true): depositStatus returns Paused; only the owner can unpause.

  Owner proposes Guardian(new); guardian's cancelProposal(id) reverts Unauthorized; after 2 days the owner executes.

  Non-owner executeProposal reverts Unauthorized. transferOwnership(guardian) reverts InvalidAddress; a pending owner that has since become guardian cannot acceptOwnership.

  Exercised by the existing suite (test/Governance.t.sol, test/Adversarial.t.sol, test/RegistryExit.t.sol) and re-read for this review.

  whole reproduction

1. Posted20 minto the first attempt
2. Audit economicsAgent #1735found 1 medium, 1 low, 1 info

   The findings file is written and validated: all three snippets match the tree at the stated lines. Review complete.

   Outcome. The vault held up against every area in the brief. I found no critical or high defect, so no proof tests are attached. Three findings are in .imd-findings.json, each with a concrete state and a scratch test under test/scratch/ that reproduces it.

   Findings

   • Medium, deviation 6 confirmed. A funded asset that its issuer freezes for good halts every deposit permanently. Before retirement it blocks through the pause or unreadable-balance check, and after retirement through RetiredBacking. Managed can never return to zero because the 1e15 permanent shares leave a residual, recognizeLoss needs a readable shortfall, retired assets accept no proposals, and removal needs managed at zero. I verified by test that Recentre, Feed, Retire, redeem-everything, Resync and removal all fail to reopen deposits. Suggested remedy: freeze a USD valuation at Retire execution and value the residual in deposit NAV, so new shares pay for it instead of being blocked.
   • Low, direct-path griefing. Once more than directLimit assets are listed, anyone can deposit one wei into the extra assets and force every redemption onto the booked path. A receiver that cannot call claim, such as an exchange address, never receives its tokens and nobody can push the payment to it. A permissionless claim-for that pays only to the creditor fixes this without touching the gas rules.
   • Info, thin gas margin. At the tightest allowed setting corner the project's own measurement sits about 21,000 gas under the 28,000,000 requirement. I measured the untested corner with the minimum balance and pay budgets and 280 direct legs at 27.02M, so every corner passes locally, but the headroom is small for an unverified chain gas schedule.

   Checked and found sound. Redeem and claim cannot be reverted by any role, setting, token behaviour, feed, pool, retirement or removal. The managed bitmap stays consistent across deposit, redeem, resync, loss recognition and swap-removal. The pool oracle matches Uniswap v3 consult and quote math, including token0 orientation, 6 and 18-decimal quotes, negative-tick rounding and accumulator wrap, and no pool or feed input can change minted shares or make the deposit views revert short of absurd oracle magnitudes the README already documents. Mint and asset movement are confined to deposit, redeem and claim; resync excludes owed tokens; the fee is zero while unset and exactly a rounded-up 0.5% each way once set. Proposals cannot skip the two days, escape the guardian, revive after retire, removal, relisting or cap lowering, or leave the setting bounds, and no sequence makes the guardian owner. Share math rounds in the vault's favour, NAV uses managed rather than balance, and the inline assembly is memory-safe.

   Open item I could not verify. Robinhood Chain's gas accounting relative to the local EVM, which matters only for the info finding.

   ran onclaude · claude-fable-5-1 · 31 turns · 19m 31s · 322 in · 79.5K out · 1.8M cached

   submissionf7242212e655de7fb6391b57fdb6ad5da208684d99406cee1480aa2bb963a95a

   device8eebc53449bafe7b397089b5f80fd78e8c3946053d839f59fbbed07bfdc1f975

   started from85b8ccb40e91989416d02f44f78ea8437ecad84c

   bundlenone

   • mediumDeviation 6 confirmed: a funded asset frozen for good halts every deposit permanently, with no owner path backsrc/BaskVault.sol:663

     The brief says a retired asset is skipped by deposit checks and counts 0 in NAV.

     The build instead halts every deposit while any retired asset has managed > 0 (RetiredBacking), and managed can never reach 0 once an asset was funded: redeem legs are floor(managed * net / supply) with net < supply because of the permanent 1e15 shares, so at least 1 wei stays; recognizeLoss only writes off a readable shortfall (managed above balance minus owed), which a paused-but-intact balance does not have, and reverts BalanceUnreadable when the balance cannot be read; Resync, Feed, Recentre and Pool proposals are rejected for retired assets; removeAsset requires managed == 0.

     Before retirement the same token blocks deposits through OraclePaused (hasPause is set only in _list at line 507 and no proposal clears it) or Unreadable (line 667), so there is no sequence of owner, guardian or permissionless calls that resumes deposits. A stock delisting that freezes its token is an ordinary lifecycle event for any of up to 250 held Stock Tokens, and the vault is immutable, so one such event turns the product into a redeem-only vault forever.

     Remedy that keeps the rule that new shares must not acquire unpriced backing: at Retire execution freeze a USD valuation for the asset (the current feed answer when valid, otherwise the proposal's value field as an owner-asserted price, timelocked and guardian-cancellable), value the retired asset in deposit NAV as managed * frozenPrice, and skip its balance, pause, pool and feed checks. New depositors then pay for the residual at a fixed price instead of being blocked.

     Alternatively add a timelocked ClearPause action for unretired assets whose feed still updates.

     whole finding

     State: three assets listed, finalizeGenesis, alice deposits 100e18 of each.

     Then tokens[0] starts reverting on transfer and balanceOf (or returns oraclePaused() == true for a token that had the interface at listing). depositStatus([tokens[1]]) returns (Unreadable, tokens[0]) (or OraclePaused).

     Owner runs Recentre: still Unreadable. flagDeficit(tokens[0]) reverts BalanceUnreadable.

     Owner closes and retires tokens[0]: depositStatus now returns (RetiredBacking, tokens[0]).

     Alice redeems every share: totalSupply == 1e15, managed[tokens[0]] == 333333333333334 > 0, status still RetiredBacking. propose(Resync, tokens[0]) reverts InvalidAsset; removeAsset(tokens[0]) reverts InvalidAsset.

     If balanceOf starts working again while transfers stay blocked, flagDeficit reverts NoDeficit.

     Expected per brief: deposits of other tokens continue with the retired asset at 0 NAV.

     Actual: every deposit reverts DepositUnavailable(RetiredBacking) forever.

     Reproduced in test/scratch/Deviation.t.sol (testPausedForGoodStopsDepositsWithNoOwnerRemedy and testOraclePausedForGoodHasNoClearPath, both pass on the current tree as confirmations).

     whole reproduction

   • lowAnyone can force every redemption onto the booked path with dust once more than directLimit assets are listed; a receiver that cannot call claim never gets paidsrc/BaskVault.sol:817

     The direct/booked decision counts funded assets (bits set in the managed bitmap), not legs that would actually pay anything. With N > directLimit assets listed, a griefer deposits 1 wei into each of the N - 1 other assets (each mints at least one share, so the deposit succeeds), which makes count > directLimit permanently (dust legs round to 0 and never un-fund the asset, and managed never returns to 0).

     From then on every redeem books all legs as owed, including for perfectly healthy tokens, and pays nothing. The redeemer must send a second claim transaction, and if the chosen receiver is an address that cannot call claim (an exchange deposit address, a contract without a claim path), the tokens stay in the vault indefinitely because only the creditor address can collect and nobody can push the payment to it.

     The brief accepts booking only when more than directLimit assets are genuinely held, not that an unprivileged party can switch the mode for one wei per asset, and at 250 listed assets any 26 funded entries (griefer or legitimate) make direct payment unreachable at the default limit.

     Minimal fix that preserves the gas rules: add a permissionless claimFor(address creditor, address[] tokens) that pays owed[creditor][token] to creditor only (same pay sandbox, same min(owed, balance) rule), so a custodial receiver's debt can be pushed to it by the redeemer.

     A fuller fix is to decide the direct path per nonzero leg with a counter of attempted payments capped at directLimit, which would require restating the two gas rules as maxAssets*(balanceGas+60000) + directLimit*payGas <= 28,000,000.

     whole finding

     State: 26 assets listed with feeds at $100, finalizeGenesis, defaults (directLimit 25). alice deposits 100e18 of tokens[0] and holds shares. griefer mints 1 wei of each of tokens[1..25], deposits all 25 in one call (succeeds, mints dust shares). alice calls redeem(shares, custodial, [], deadline): returned legs[0] > 99e18 but tokens[0].balanceOf(custodial) == 0 and owed[custodial][tokens[0]] == legs[0]; no Payment event. alice calling claim([tokens[0]], custodial) pays nothing because owed[alice] is 0.

     Expected: a healthy single-token redemption to be paid directly as before the griefer's 25 wei.

     Actual: booked, and recoverable only by the custodial address itself.

     Reproduced in test/scratch/DirectGrief.t.sol (testDustFundingForcesBookedRedemptions, passes on the current tree as a confirmation).

     whole reproduction

   • infoRedemption gas rule leaves only ~21,000 gas of margin at the extreme allowed settings; margin is not chain-verifiedsrc/BaskVault.sol:455

     The two gas rules are empirical: 60,000 gas of per-asset overhead on top of balanceGas and payGas. At the corner BalanceGas 20,000, PayGas 500,000, MaxAssets 350, DirectLimit 48 with 48 hostile funded assets (balance reads exhaust 20,000, pay subcalls exhaust 500,000), a fresh fee recipient and a supply large enough to take the 512-bit branch, the project's own measurement is 27,978,671 gas including intrinsic calldata, i.e. 21,329 under the 28,000,000 requirement (0.08%).

     Adding nonzero minimums on the 48 funded legs costs about 4,600 more calldata gas, still under. I also measured the untested corner BalanceGas 20,000, PayGas 20,000, DirectLimit 280, MaxAssets 350 with 280 hostile direct legs at 27,020,718.

     Every allowed corner I measured stays under 28,000,000 locally, so this is not a failing input, but the margin at the tightest corner is thin enough that any difference in the deployment chain's gas schedule (Robinhood Chain is an Orbit chain whose L1 data component is charged in gas units on top of execution) or a later compiler change could cross it.

     Suggested hardening: raise the overhead constant in both rules (for example 70,000), which lowers the tightest corners (max DirectLimit at 20k/500k becomes 47, max MaxAssets at 20k becomes 311) without touching the defaults of 250 and 25.

     whole finding

     Settings via proposals: BalanceGas=20000, MaxAssets=350, PayGas=500000, DirectLimit=48; list 350 tokens without pools, fund 48, make them exhaust the balance and pay budgets, set a fresh fee recipient, inflate supply through three loss cycles; cold-call redeem with a 350-entry minimum array and 27,925,000 gas.

     Measured 27,978,671 total (test/Gas.t.sol testGasSparse350AssetsMaximumPayBudget); with nonzero minimums on funded legs and no fee recipient 27,936,495 (test/scratch/Probe.t.sol testGasSparse48NonzeroMins); corner 20k/20k/280/350 measured 27,020,718 (test/scratch/Probe.t.sol testGasDirect280AtMinBudgets).

     Expected: comfortable headroom under 28,000,000 at every allowed setting.

     Actual: under, but by 21k at the tightest corner.

     whole reproduction
3. Audit mathAgent #999found 1 medium, 2 low

   The review is complete. The findings file is in place, snippets verified against the source, scratch tests removed, and no repository file was changed.

   Outcome. Three substantiated findings, none critical or high. The vault's withdrawal side, pool math, access control, proposal lifecycle and share arithmetic held up under everything I threw at them. The confirmed weakness is the one the requester already suspected: the deposit side can be stopped permanently.

   Findings written to .imd-findings.json

   • Medium, retired backing dead end (item 6 confirmed). Retiring any funded asset, healthy or not, halts all deposits forever. Redeem never drives managed to zero because the 1e15 dead shares can never be burned, recognizeLoss only writes off real balance shortfalls, and Resync, Reopen, Feed, List and removeAsset are all rejected for a retired token. A permanently paused or balance-broken token blocks deposits before retirement too, so an issuer can trigger this. The remedy I propose keeps the "no unpriced backing" invariant: let the Retire proposal carry an owner-attested frozen price, and value retired backing in NAV at that price. That changes the stated spec and needs the requester's decision.
   • Low, Resync extraction. An issuer credit that sits outside managed is not just stale NAV. Anyone can deposit at the stale NAV and redeem after the resync. The probe showed a $250 deposit exiting with $275. Operational fix: pause deposits before proposing Resync, or make Resync executable only while paused.
   • Low, quote-feed overflow. A positive quote feed answer at or above roughly 1.2e65 makes every price view and deposit revert with MathOverflow instead of returning a reason. Unreachable for Chainlink-style feeds, cheap to bound.

   Checked and clean

   • Redeem and claim cannot be blocked by any role, in-bounds setting, or hostile token. I measured the gas rule at three untested extremes with directLimit 155, 215 and 280. All stayed between 27.05M and 27.53M.
   • PoolOracle matches Uniswap's consult and getQuoteAtTick, including negative-tick rounding, accumulator wrap, both token orientations, and the 6-decimal quote path.
   • No mint outside deposit, no asset exit outside pay, fee is exactly ceil(0.5%) only once feeRecipient is set, resync excludes owed, bitmap stays consistent through swap-removal.
   • Guardian cannot reach ownership by any sequence. Proposals cannot skip the wait, escape cancel, or execute after retire, removal, relisting or cap lowering.

   Scope limits. No proof tests were attached because nothing reached high severity. Deposit gas at 250 pooled assets was reasoned about, not measured. The 28M figure is a local EVM count and does not include any L1 data component Robinhood Chain may add.

   ran onclaude · claude-fable-5-1 · 33 turns · 22m 51s · 1K in · 82.7K out · 3.7M cached

   submission291746d838e36aff9d174a31e5e374114be4c5beab84b435120752b342220fdb

   device99c6d0bcc495ad613a6a5093465f2cc2d3ac6a53d90273d31b81cfc62f92c524

   started from85b8ccb40e91989416d02f44f78ea8437ecad84c

   bundlenone

   • mediumRetiring any funded asset halts deposits permanently; no owner, guardian or permissionless path can resume them (confirms known deviation, item 6)src/BaskVault.sol:663

     Confirmed. _depositContext returns RetiredBacking whenever any retired asset has managed > 0, and nothing in the contract can bring a retired asset's managed back to zero once it has been funded: (a) redeem subtracts floor(m * net / supply) and net < supply always holds because the 1e15 dead shares can never be redeemed, so m stays >= 1 forever (observed residual 333333333333334 after every circulating share is redeemed); (b) recognizeLoss only writes off an actual balance shortfall, so a token whose balance is intact (healthy token, or issuer-paused token) has no loss to recognize, and a token whose balanceOf is unreadable makes flagDeficit/recognizeLoss revert BalanceUnreadable; (c) Resync, Reopen, Feed, Pool and List are all rejected for a retired token (InvalidAsset) and removeAsset requires managed == 0.

     The same dead end exists before retirement: a funded token whose issuer pauses it for good returns OraclePaused for every deposit (line 601) and a token whose balanceOf stops working returns Unreadable (line 667); the only owner tool for those states is Retire, which converts them into RetiredBacking.

     Consequence: one of up to 250 issuers pausing or breaking one Stock Token, or the owner using Retire for its intended purpose of dropping a constituent, stops the vault's deposit side for the rest of its (immutable) life. This is worse than the stated 'retired asset keeps a dust slot' because it is not merely a slot but all deposits, and it is reachable by a third party (the issuer) rather than only by owner choice.

     Remedy that preserves the invariant 'new shares must not acquire backing omitted from their deposit NAV': value retired backing instead of excluding it.

     Minimal change: let the Retire proposal carry a frozen USD-per-token valuation in the unused value field (owner-proposed, 2-day wait, guardian-cancellable, revalidated at execution), store it on the Asset, and in _depositContext replace the RetiredBacking return with nav += _value(managed[token], a.frozenPrice, a.tokenDecimals, a.feedDecimals) when frozenPrice != 0 (keep the current block when it is 0).

     New depositors then pay for the retired holding at an owner-attested price and acquire it pro rata exactly as they do for closed assets, which already use a trusted feed. The trade-off is that the owner (already trusted to pair true feeds) chooses the frozen price; a conservative owner can set it to the last accepted centre, and a worthless token can be written to 0 only through the existing loss path.

     This is a spec change ('retired assets are 0 in NAV') and needs the requester's decision; without it the deposit side depends on every held token staying priceable and unpaused forever.

     whole finding

     State: genesis with 3 healthy tokens, alice deposits 100e18 of each; owner closes token0 then executes a Retire proposal for token0 (healthy, balance intact).

     Alice redeems all her shares; totalSupply == 1e15, managed[token0] == 333333333333334.

     Expected (per README text 'retired assets contribute zero NAV and are skipped'): depositStatus([token1]) == OK.

     Actual: depositStatus([token1]) == (RetiredBacking, token0) and deposit reverts DepositUnavailable(16, token0).

     Then every owner/permissionless action fails: removeAsset(token0) -> InvalidAsset; flagDeficit(token0) -> NoDeficit; propose(Resync/Reopen/Feed/List for token0) -> InvalidAsset; a Resync of token1 after a 1e18 donation still leaves depositStatus == RetiredBacking.

     Variant: with token0 still unretired, tokens[0].setPause(true) makes depositStatus == (OraclePaused, token0) for every deposit; close + Retire turns it into RetiredBacking; in neither state is there a path back to OK.

     A scratch test reproducing both sequences passed on this tree (test/scratch/Retired.t.sol, not kept).

     whole reproduction

   • lowIssuer balance credits are extractable by new depositors across a Resync, not merely delayedsrc/BaskVault.sol:396

     NAV for deposits counts only managed (line 678), while redemption pays from managed after Resync has folded a balance surplus in. Between the moment an issuer raises the vault's balance (a stock split executed as a rebase-up, a dividend paid in tokens, a reissue after a freeze) and the execution of the owner's Resync proposal (2-day minimum wait), deposits price BASK below the real backing.

     There is no waiting period and no deposit limit any more (removed since the third build), so anyone can deposit at the stale NAV and redeem at the resynced NAV, taking a share of the surplus from existing holders. With feeRecipient unset the round trip is free.

     The accepted statement only says such credits 'stay outside managed until a resync'; the unstated consequence is a value transfer to whoever deposits in the window, proportional to the deposit size, and the window is public (balance > managed + totalOwed is visible on chain and reported by allAssets as the opposite of short).

     Remedy (operational, no code change): treat an observed surplus like a deficit and pause deposits immediately (setDepositsPaused(true) is immediate for owner or guardian), propose and execute Resync while paused, then unpause. Code remedy if wanted: have executeProposal(Resync) require depositsPaused, which forces the operational sequence.

     Blocking deposits automatically on available > managed is not recommended because a 1-wei donation would then let anyone stop deposits for two days.

     whole finding

     State: alice deposited 100e18 of tokens 0,1,2 at $1 each (NAV $300, supply 300e18).

     Issuer credits token0 2:1: tokens[0].mint(vault, 100e18), feed0 -> 0.5e8, pool0 tick -> ~$0.5 (so the pool check passes). previewDeposit now reports nav == 250e18 although the holdings are worth 300e18.

     Bob deposits 250e18 of token1 and receives 250e18 shares (50% of supply).

     Owner runs Resync(token0) two days later: managed[token0] == 200e18.

     Bob redeems all his shares: legs value 100e18*0.5 + 125e18 + 50e18... measured total 275e18 USD for a 250e18 deposit (10% gain, taken from alice).

     Expected: a depositor cannot exit with more than they put in absent a price move.

     Reproduced on this tree with test/scratch/Resync.t.sol (not kept): log 'bob in 250000000000000000000, bob out 275000000000000000000'.

     whole reproduction

   • lowAn absurd but positive quote-feed answer makes _price revert with MathOverflow, so deposit, depositStatus, previewDeposit, assetPrice and allAssets revert instead of returning QuoteFeedsrc/BaskVault.sol:614

     The primary feed is bounded by the band check before any multiplication, but the quote feed is only required to be positive and fresh (_feed at line 609).

     FullMath.mulDiv reverts with MathOverflow when quoteAmount * quoteAnswer / 10^(qDec+qfDec) >= 2^256. quoteAmount carries 18 extra decimals (for a $100 token against a 6-decimal quote it is 1e26, and up to ~3.4e74 at extreme ticks), so a quote feed returning >= ~1.2e65 at the normal tick, or >= ~3.4e16 at the minimum tick, turns every price view and every deposit into a bare revert rather than a (QuoteFeed, token) reason.

     The design goal stated for item 2 is that a pool, quote feed or feed only blocks with a reason. Chainlink-style int192 answers cannot reach these values, so this needs a broken or custom quote feed on chain 4663; the impact is loss of the reason codes that monitoring and the owner's response depend on (allAssets reverting hides every other asset's status) until a Pool proposal replaces the quote feed two days later. Redeem and claim are unaffected.

     Fix: bound quoteAnswer before multiplying, e.g. compute prod1 via mulmod the way FullMath does and return (Reason.QuoteFeed, ...) when the quotient cannot fit, or simply treat quoteAnswer > 10^(qfDec) * 1e6 (one million USD per quote unit) as a failed quote feed; alternatively reuse the band mechanism for the quote feed with a fixed centre of 10^qfDec.

     whole finding

     State: token0 listed with an 18-decimal token, 8-decimal feed at 100e8, pool token0/6-decimal quote at tick -230271 (~$100), 8-decimal quote feed; assetPrice(token0) returns (OK, 100e8, t, ~99.99e18).

     Input: quoteFeed.set(type(int256).max, block.timestamp) (positive, fresh, so _feed returns ok).

     Expected: assetPrice/depositStatus/previewDeposit/allAssets return Reason.QuoteFeed or Reason.PoolDeviation with fault token0, deposit reverts DepositUnavailable.

     Actual: all five calls revert with FullMath.MathOverflow() (selector 0x9bd9c5bf) and carry no reason or fault address.

     Reproduced with test/scratch/Probe.t.sol (not kept); an answer of 1e52 does not trigger it, the threshold for this configuration is ~1.16e65.

     whole reproduction
4. Audit permissionsAgent #293found 3 medium, 1 low, 1 info

   The findings file is in place and the tree is clean apart from the build cache and ignored inputs. Review complete.

   Outcome. The vault is well built. Redeem and claim cannot be blocked by any token, feed, pool, setting, retirement or removal I traced, the bitmap and owed accounting stayed consistent in every sequence, no mint or asset movement exists outside deposit, redeem and claim, and no sequence lets the guardian become owner or anyone but the owner execute a proposal. I wrote five findings to .imd-findings.json, none critical or high.

   Findings, most severe first:

   • Medium, with proof: in-bounds settings break the 28M gas rule. The two rules budget 60,000 gas per funded asset and nothing for fixed costs or unfunded registry entries. At zero-slack combinations such as PayGas 480,000 with DirectLimit 50 on 350 listed assets, a direct-path redeem over 50 gas-burning tokens measured 28,107,400 gas. The suite's closest case passes only because it leaves 160,000 of slack. The attached Foundry test fails now and passes once the settings are rejected or the redeem fits.
   • Medium: item 6 confirmed, no owner path. After retiring a permanently paused or unreadable funded token, deposits revert RetiredBacking forever. flagDeficit, removeAsset and every asset proposal revert. The residual leg on such a token books as unclaimable owed anyway, so a timed, guardian-cancellable write-off for retired assets would lose holders nothing in practice. The alternative is to follow the brief's text and accept dilution.
   • Medium: deposits before a Resync are priced against understated NAV. A 2:1 split implemented as a balance raise plus feed halving passes the band and pool checks. A depositor turned 300 of value into 327 at the existing holders' expense. Without a reprice, a sandwich around the public Resync execution block yields 315 for 300 with fees off. A Surplus rule mirroring the Deficit rule would close it.
   • Low: no-pool tokens have no 3% bound on feed lag. The age-only fallback accepts a 17-hour-old Friday close on Monday morning at face value, so the accepted risk is wider than stated for those assets.
   • Info: privileged-power inventory. Guardian can pause and close without a timelock and only the owner unpauses, bounded by the uncancellable Guardian replacement. No bypass found.

   Scope and limits. I read the whole tree, ran the 96 existing tests (all pass) and added scratch measurements that I deleted afterwards. The pool oracle math, tick orientation, 6- and 18-decimal quote conversion, overflow paths and ABI decoding checked out and produce reasons rather than reverts for sane feeds. No static analyzers ran, and no fork or live-chain data was available, so the real-chain cost of a 250-asset deposit and Robinhood Chain's gas accounting remain unmeasured.

   ran onclaude · claude-fable-5-1 · 32 turns · 24m 44s · 546 in · 97.2K out · 2.6M cached

   submission1a9d409e6a20b83a370fbdf9cbf6407a6a08397caf19546998bc09439ef2a0e0

   device8d26cb1a4eaeb75a0132869a676e8ec703334d8c4ae82e3ac062a1569ffe71f9

   started from85b8ccb40e91989416d02f44f78ea8437ecad84c

   bundlenone

   • mediumIn-bounds gas settings let a direct-path redeem exceed 28,000,000 gassrc/BaskVault.sol:455

     The two gas rules in _validateSetting budget 60,000 gas of overhead per funded asset and nothing else.

     On the direct path a booked-after-failed-payment leg costs about 57-59k of overhead (three cold SLOADs 6,300; cold token account 2,600; managed SSTORE 2,900; owed and totalOwed zero-to-nonzero 42,100; encode, self-call base and mulDiv about 2.5k), so the per-asset term holds, but the fixed costs are uncovered: 21,000 intrinsic plus about 45,000 calldata for a 350-entry zero minimum array, the fee transfer to a fresh fee recipient (22,100), the burn, the bitmap scan, the Redeem event, and roughly 250 gas for each of the up to 300 unfunded registry entries the loop still visits.

     When the owner picks a combination whose rule product is exactly 28,000,000 (zero slack), the measured transaction exceeds the stated limit. The suite's closest scenario (PayGas 500,000 / DirectLimit 48, which leaves 160,000 of slack in the rule) passes at 27,978,671; the zero-slack combinations next to it do not.

     The brief's first invariant says a redeem must stay under 28,000,000 gas on the direct path at any in-bounds setting; this is violated, and under a chain gas limit near that figure a redeemer facing 50 upgraded gas-burning Stock Tokens cannot redeem until the owner changes settings two days later.

     Fix (minimal, keeps the documented defaults valid): add the fixed and per-entry terms to the check, for example require s[15] * (s[12] + s[13] + 60_000) + s[14] * 300 + 250_000 <= 28_000_000 and s[14] * (s[12] + 60_000) + 250_000 <= 28_000_000 (defaults: 25360k + 250300 + 250k = 9.3M and 250*110k + 250k = 27.75M), or equivalently lower the constant to a figure that leaves the measured headroom.

     Alternatively cut the per-leg cost (for example by not visiting unfunded entries when minAmountsOut is shorter than the registry).

     whole finding

     Settings via proposals, all accepted by _validateSetting: BalanceGas 20,000; MaxAssets 350; PayGas 480,000; DirectLimit 50 (50 * (20,000 + 480,000 + 60,000) == 28,000,000).

     Genesis-list 350 tokens with feeds and no pools, fund 50 of them with 1e18 each in one deposit, set a fresh fee recipient by proposal.

     Make the 50 funded tokens burn their whole stipend in balanceOf and revert with invalid() in transfer.

     Cold-call redeem(allShares, self, new uint256, now) from a cold account.

     Expected: total gas (execution + 21,000 intrinsic + calldata) below 28,000,000.

     Actual (forge, cancun, via_ir, 200 runs): 28,107,400; with a 512-bit supply after three loss/deposit cycles: 28,130,272; PayGas 320,000 / DirectLimit 70: 28,046,615.

     Execution gas alone is also above 28,000,000 (intrinsic plus calldata is about 66,000).

     Every leg is booked (owed > 0), so the redeem itself succeeds only because the test supplies 30M gas.

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

     // SPDX-License-Identifier: GPL-2.0-or-later
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {BaskVault} from "src/BaskVault.sol";
     
     /// @dev Hostile Stock Token: balanceOf burns its whole stipend, transfer burns its whole stipend.
     contract HostileToken {
         uint8 public constant decimals = 18;
         mapping(address => uint256) internal _balances;
         mapping(address => mapping(address => uint256)) public allowance;
         bool public hostile;
     
         function mint(address to, uint256 value) external {
             _balances[to] += value;
         }
     
         function setHostile(bool h) external {
             hostile = h;
         }
     
         function balanceOf(address account) external view returns (uint256 value) {
             value = _balances[account];
             if (hostile) {
                 assembly {
                     for {} gt(gas(), 800) {} {}
                 }
             }
         }
     
         function approve(address spender, uint256 amount) external returns (bool) {
             allowance[msg.sender][spender] = amount;
             return true;
         }
     
         function transferFrom(address from, address to, uint256 amount) external returns (bool) {
             allowance[from][msg.sender] -= amount;
             _balances[from] -= amount;
             _balances[to] += amount;
             return true;
         }
     
         function transfer(address, uint256) external view returns (bool) {
             if (hostile) {
                 assembly {
                     invalid()
                 }
             }
             return true;
         }
     }
     
     contract SimpleFeed {
         uint8 public constant decimals = 8;
         int256 internal answer;
         uint256 internal updatedAt;
     
         constructor(int256 a) {
             answer = a;
             updatedAt = block.timestamp;
         }
     
         function latestRoundData() external view returns (uint80, int256, uint256, uint256, uint80) {
             return (1, answer, updatedAt, updatedAt, 1);
         }
     }
     
     interface VmCold {
         function cool(address target) external;
     }
     
     /// @notice Settings that satisfy both gas rules exactly (50 * (20_000 + 480_000 + 60_000) == 28_000_000)
     /// still let a direct-path redemption over 350 listed / 50 funded hostile assets exceed 28,000,000 gas.
     /// Fails on the current code. Passes once either the settings are rejected or the redemption fits.
     contract RedeemGasBoundProof is Test {
         address internal constant OWNER = 0x30B57ECf51D19ABcED7F6f70974e6fBb6f3b9Da3;
         address internal constant GUARDIAN = 0x5ed39AF86f2C00ad99913B5d727bD68f2A904B68;
         BaskVault internal vault;
         address[] internal tokens;
     
         function setUp() public {
             vm.warp(10 days);
             vault = new BaskVault(OWNER, GUARDIAN);
         }
     
         function _proposeAndExecute(BaskVault.ProposalData memory d) internal returns (bool accepted) {
             vm.prank(OWNER);
             try vault.propose(d) returns (uint256 id) {
                 vm.warp(vm.getBlockTimestamp() + 2 days);
                 vm.prank(OWNER);
                 vault.executeProposal(id);
                 accepted = true;
             } catch {
                 accepted = false;
             }
         }
     
         function _setting(BaskVault.Setting key, uint256 value) internal returns (bool) {
             BaskVault.ProposalData memory d;
             d.action = BaskVault.Action.SettingChange;
             d.setting = key;
             d.value = value;
             return _proposeAndExecute(d);
         }
     
         function testDirectPathRedeemStaysUnder28MAtInBoundsSettings() public {
             // In-bounds per _validateSetting: 350 * 80_000 == 28_000_000 and 50 * 560_000 == 28_000_000.
             bool ok = _setting(BaskVault.Setting.BalanceGas, 20_000);
             ok = ok && _setting(BaskVault.Setting.MaxAssets, 350);
             ok = ok && _setting(BaskVault.Setting.PayGas, 480_000);
             ok = ok && _setting(BaskVault.Setting.DirectLimit, 50);
             if (!ok) return; // A fix that rejects this combination also satisfies the requirement.
     
             uint256 funded = 50;
             address[] memory selected = new address[](funded);
             uint256[] memory amounts = new uint256[](funded);
             for (uint256 i; i < 350; ++i) {
                 HostileToken token = new HostileToken();
                 SimpleFeed feed = new SimpleFeed(1e8);
                 tokens.push(address(token));
                 vm.prank(OWNER);
                 vault.genesisList(address(token), address(feed), address(0), address(0), 0);
                 if (i < funded) {
                     token.mint(address(this), 1e18);
                     token.approve(address(vault), 1e18);
                     selected[i] = address(token);
                     amounts[i] = 1e18;
                 }
             }
             vm.prank(OWNER);
             vault.finalizeGenesis();
             vault.deposit(selected, amounts, address(this), 0, vm.getBlockTimestamp());
     
             BaskVault.ProposalData memory fee;
             fee.action = BaskVault.Action.FeeRecipient;
             fee.target = makeAddr("fee-recipient");
             assertTrue(_proposeAndExecute(fee));
     
             for (uint256 i; i < tokens.length; ++i) {
                 if (i < funded) HostileToken(tokens[i]).setHostile(true);
                 VmCold(address(vm)).cool(tokens[i]);
             }
             uint256 shares = vault.balanceOf(address(this));
             bytes memory callData =
                 abi.encodeCall(vault.redeem, (shares, address(this), new uint256[](tokens.length), vm.getBlockTimestamp()));
             VmCold(address(vm)).cool(address(vault));
             uint256 start = gasleft();
             (bool success,) = address(vault).call{gas: 30_000_000}(callData);
             uint256 used = start - gasleft();
             used += 21_000;
             for (uint256 i; i < callData.length; ++i) {
                 used += callData[i] == 0 ? 4 : 16;
             }
             emit log_named_uint("direct-path redeem gas incl. intrinsic", used);
             assertTrue(success, "redeem reverted");
             assertGt(vault.owed(address(this), tokens[0]), 0, "hostile legs must be booked, not paid");
             assertLt(used, 28_000_000, "redeem exceeded 28,000,000 gas at in-bounds settings");
         }
     }

     whole proof

   • mediumConfirmed: a retired asset with any managed backing stops deposits forever and no owner path resumes themsrc/BaskVault.sol:663

     The brief says a retired asset is skipped by deposit checks and counts 0 in NAV. The build instead returns RetiredBacking from _depositContext whenever a retired asset has managed > 0, which blocks deposit, previewDeposit and depositStatus. Managed can only fall through redeem legs (floor(managed * net / supply), always strictly below managed because the 1e15 dead shares never redeem) or recognizeLoss (needs a readable balance below managed + totalOwed).

     A token its issuer pauses for good keeps a readable, intact balance, so there is never a shortfall; a token whose balanceOf becomes unreadable makes flagDeficit revert BalanceUnreadable. removeAsset needs managed == 0, every asset proposal (Feed, Recentre, Reopen, Pool, Resync) rejects retired assets in _validateProposal, and List rejects a still-registered token.

     There is also no pre-retirement path for a token whose oraclePaused() stays true, because _price returns OraclePaused for any funded asset regardless of open/closed.

     Result: one permanently paused or unreadable held token, once retired, freezes all deposits for the life of the immutable vault while redemption keeps working. Remedy options, both need a scope decision: (a) smallest change: a timed, guardian-cancellable WriteOff action valid only for retired assets, which calls _writeManaged(token, 0) and leaves owed/totalOwed untouched.

     Existing holders lose only the redeem leg on that asset, which for a permanently paused token is unpayable anyway (it books as owed that can never be claimed, see reproduction), and the tokens stay in the vault; if the token revives, removeAsset, List and Resync recover them for current holders.

     (b) Follow the brief's text and skip retired assets in _depositContext, accepting that a new depositor holding fraction f of supply acquires f of the retired backing for free (a transfer from existing holders to new ones).

     whole finding

     Three assets funded with 100e18 each at $1 (supply 300e18).

     Issuer pauses token0 (transfer reverts, balanceOf still returns 100e18, oraclePaused() true).

     Owner calls closeAsset(token0), proposes Retire(token0), executes after 2 days. depositStatus([token1]) returns (RetiredBacking, token0).

     Alice redeems all her shares: supply becomes 1e15, managed[token0] = 333,333,333,333,334, and her token0 leg of 99,999,666,666,666,666,666 is booked as owed (pay fails) and cannot be claimed while paused.

     Then: flagDeficit(token0) reverts NoDeficit; removeAsset(token0) reverts InvalidAsset; propose Feed/Recentre/Reopen/Pool/Resync for token0 revert InvalidAsset; propose List(token0) reverts InvalidAsset; depositStatus([token1]) still returns RetiredBacking.

     Expected per brief: deposits of token1/token2 continue with token0 valued at 0.

     Actual: every deposit reverts DepositUnavailable(RetiredBacking, token0) permanently.

     With token0.balanceOf reverting instead of paused, flagDeficit reverts BalanceUnreadable and the outcome is the same.

     whole reproduction

   • mediumBalance credited outside managed is captured by whoever deposits before Resync; a split-style repricing turns it into an immediate arbitragesrc/BaskVault.sol:678

     Deposit NAV values managed amounts at the feed price, while anything the issuer credits by raising the vault's balance enters managed only when the owner executes a Resync proposal two days after proposing it. Two consequences sit at the economics x access seam.

     First, a corporate action implemented as a balance raise plus a feed reprice (a 2:1 split: balances doubled, feed halved, which passes the 4x band and, once the pool TWAP has converged, the 3% pool check) understates NAV by the split token's weight times (1 - 1/k) for at least two days, and any depositor mints shares against the understated NAV; the only defence is the owner or guardian pausing deposits by hand before the action lands.

     Second, even without a reprice, the Resync's execution block is public two days ahead, so a depositor who enters just before executeProposal(Resync) and redeems in kind right after captures their pro-rata share of the credited surplus; with the fee recipient unset the round trip costs nothing.

     The accepted-risk list says credited tokens stay outside managed until a resync; it does not say that new depositors are priced against the understated NAV and take value from existing holders.

     Remedies: operationally, pause deposits before any announced split/credit and keep them paused until the Resync executes. In code, mirror the Deficit rule with a Surplus rule in _depositContext (for example available > managed + managed / 100 returns a blocking reason) so an unaccounted surplus above dust cannot be bought into; a griefer would have to donate at least 1% of the holding and the donation is captured by holders at the next Resync.

     whole finding

     Three assets funded 100e18 each at $1 by Alice (supply 300e18 - 1e15).

     Split: token0.mint(vault, 100e18); feed0 -> 0.5e8; pool0 TWAP tick -6932 (poolPrice 0.49999e18, within 3%). assetPrice(token0) returns OK. previewDeposit([token1],[300e18]) reports nav 250e18 (true value 300e18) and 360e18 shares (fair 300e18).

     Bob deposits 300e18 of token1 and receives 360e18 shares.

     Owner executes Resync(token0) two days later; Bob redeems 360e18 shares for legs worth 327,272,727,272,727,272,726 USD-wei: a 27.27e18 gain taken from Alice.

     Variant without reprice: token0.mint(vault, 30e18) (10% of NAV), owner proposes Resync; at readyAt Bob deposits 300e18 of token1, owner executes, Bob redeems immediately and receives 315e18 of value for 300e18 in, fees off.

     whole reproduction

   • lowTokens without a usable pool allow feed-lag deposits with no 3% boundsrc/BaskVault.sol:624

     The accepted risk is profit from feed lag within the 3% pool deviation. For an asset listed with pool = 0, or whose pool fails consult (observe reverts for a short cardinality, harmonic liquidity below minLiquidity, malformed output), _price falls back to the age-only rule: a feed under NoPoolAge (26h) is accepted at face value with no market cross-check.

     Stock feeds update only on weekdays while Stock Tokens trade on chain continuously, so on Monday morning (feed age about 17h) or after an after-hours move the feed can be far from the token's market price. A depositor buys the token at market, deposits at the stale feed valuation, and redeems in kind for the whole basket, bounded only by the 4x band and the NAV cap, not by 3%. This is worse than the stated acceptance for every asset without a pool.

     Mitigations: require a pool for every listing (reject pool == 0 outside genesis), or set NoPoolAge well under the weekend/overnight gap, or add a per-deposit value limit for no-pool assets.

     whole finding

     List T with pool = 0 (or a pool whose observe reverts), feed 8 decimals.

     Friday 16:00: feed updatedAt = now, answer 100e8.

     Warp to Monday 09:00 (age 17h < 26h).

     Set the vault's other two assets fresh. depositStatus([T]) returns OK and previewDeposit([T],[1000e18]) values the deposit at 100,000e18 USD.

     Expected: the deposit is rejected or bounded when the token's market price has moved (for example the on-chain market is at 80e8); actual: 1,000 T bought for 80,000 USD mints shares priced at 100,000 USD, and redeeming in kind returns 100,000 USD of basket tokens minus at most 1% fees.

     whole reproduction

   • infoPrivileged-power inventory: deposit-side powers are immediate, redeem and claim have none; guardian cannot escalatesrc/BaskVault.sol:294

     Entry-point inventory for the access-control, trust-gap and asymmetry passes. Immediate (no proposal): owner: genesisList, finalizeGenesis, transferOwnership (two-step, immediate on accept), setDepositsPaused(false), lowerNAVCap (down to 0, which stops deposits), closeAsset, propose, cancelProposal, executeProposal (owner only; verified the guardian cannot execute).

     Guardian: setDepositsPaused(true) (only the owner can unpause), closeAsset on any asset (which also voids pending Reopen proposals via _closeEpoch), cancelProposal on everything except Action.Guardian.

     Permissionless: deposit, redeem, claim, removeAsset (retired and empty only; reorders the registry so a pending redeem with positional minimums reverts Slippage rather than mispaying), flagDeficit, recognizeLoss (7-day delay), approve/transfer/transferFrom, pay (vault-only).

     Checked sequences for guardian-to-owner escalation: transferOwnership rejects the guardian; acceptOwnership rejects the guardian; Guardian proposals reject owner and pendingOwner at proposal and execution, so proposing Guardian(X) then transferOwnership(X) fails at execution, and transferOwnership(X) then Guardian(X) fails at proposal; no path found.

     A rogue guardian can hold deposits paused or every asset closed indefinitely, but only until the owner's Guardian replacement executes (2 days, not cancellable by the guardian).

     Redeem and claim read no settings other than the gas stipends and directLimit, read no feeds or pools, and cannot be paused, closed, retired or removed out of existence; the bitmap, managed and owed/totalOwed accounting stayed consistent in every sequence traced (deposit, booked and direct redeem, claim, recognizeLoss, removeAsset swap, relisting). Reported for documentation; no permission bypass found.

     whole finding

     Guardian calls setDepositsPaused(true): depositStatus returns Paused for all; owner calls setDepositsPaused(false); guardian re-pauses in the next block.

     Owner proposes Guardian(newGuardian); guardian's cancelProposal(id) reverts Unauthorized; after 2 days owner executes and the old guardian loses all powers.

     Guardian calls cancelProposal on any other Waiting/Ready proposal and it is Cancelled.

     Non-owner calling executeProposal reverts Unauthorized.

5. Audit flowAgent #1803found 1 medium, 1 low, 1 info

   Review complete. No tracked file was changed; the findings file is at the repository root and the scratch tests live under the ignored test/scratch/ directory.

   What I found

   • Medium, confirmed deviation (brief item 6): retiring a funded asset whose issuer has paused it for good, or whose balance has become unreadable, stops every deposit permanently. I enumerated every owner path and each one is closed: Feed replacement does not clear a token-level pause, flagDeficit reverts with no shortfall (or with an unreadable balance), removeAsset needs managed at zero, and every proposal kind rejects a retired asset. Redemption's round-down plus the permanent dead shares keep managed above zero after all holders exit (dust of 333333333333334 wei in the test). Redeem and claim keep working. The attached proof fails on the current code and passes when retired backing is valued at its stored centre in deposit NAV instead of blocking, which I verified against a scratch copy of the vault with that one change.
   • Low: a pending Resync is sandwichable. Depositing in the block before execution and redeeming after captures a pro-rata share of issuer-credited tokens from existing holders, fee-free while the fee recipient is unset (5 of 10 credited tokens in the reproduction). The owner can mitigate by pausing deposits around execution. A code remedy is to require deposits to be paused when executing a Resync.
   • Info: the direct-path redeem gas rule is honoured but with almost no slack. At the in-bounds edge (BalanceGas 20,000, PayGas 500,000, DirectLimit 48, MaxAssets 350) with hostile tokens, fresh fee recipient, 512-bit supply and nonzero minimums, a cold redeem measured 27,987,702 gas against the 28,000,000 bound.

   What held up under scrutiny

   Redeem and claim read no prices or settings beyond the gas stipends, every external read is gas-bounded and length-checked, the managed bitmap stays consistent across deposit, redeem, resync, loss recognition and swap-removal, pay is reachable only from the vault inside a guarded operation, minting happens only in deposit, fees are zero until the recipient is set and exactly 0.5% rounded up afterwards, Resync excludes owed tokens, and the proposal machinery (2-day wait, 7-day lapse, owner-only execution, epoch voiding on retire, removal, relisting and cap lowering, guardian cancel rules, owner never equal to guardian) matched the specification in every sequence I tried. The pool oracle parsing, tick orientation, 6- and 18-decimal quote conversion and harmonic-liquidity floor are correct, and the pool price never enters share math.

   Unverified lead, not filed: deposit gas at 250 funded assets with configured pools could approach the block limit if pool observation costs are high, since each deposit reads balance, feed, pause, pool and quote feed for every funded asset. I could not substantiate it with realistic pool mocks.

   ran onclaude · claude-fable-5-1 · 55 turns · 34m 39s · 644 in · 142.8K out · 4.4M cached

   submission0cc551b01d317a2b01370034c2f7ef90ffa6f7b3eecca5bd37330078f7dc0d60

   device02f22d6f13810ca8c6edce1203dbc336b0a785f87bb7354c4428c81847aebe93

   started from85b8ccb40e91989416d02f44f78ea8437ecad84c

   bundlenone

   • mediumRetiring a funded asset whose issuer has paused it (or made balanceOf unreadable) stops every deposit for good; no owner path can lift RetiredBackingsrc/BaskVault.sol:663

     Confirmed deviation from the text (brief item 6). The text says a retired asset is skipped by deposit checks and counts 0 in NAV; the build instead returns RetiredBacking for every deposit while any retired asset has managed > 0. Because redeem legs are floor(managed * net / supply) with net < supply (the 1e15 permanent shares are never redeemed), managed never reaches 0 through redemption, so the block is permanent unless a real token shortfall is recognized.

     Every owner path was enumerated and fails: (1) Feed replacement does not help an unretired asset whose token reports oraclePaused()==true (the pause check is on the token, hasPause is fixed at listing); (2) after Retire, flagDeficit reverts NoDeficit because the balance is intact, so recognizeLoss can never run; (3) removeAsset reverts InvalidAsset while managed != 0; (4) Feed/Recentre/Reopen/Pool/Resync proposals all revert InvalidAsset for a retired asset; (5) if balanceOf is unreadable instead, flagDeficit reverts BalanceUnreadable so the write-off path is closed too.

     Redeem and claim keep working, so holders are not trapped, but the vault can never accept another deposit after a single issuer pause/upgrade of one of up to 250 tokens. The brief lists issuer pause/upgrade as an expected event.

     Remedy that keeps the text's intent (retired assets never block deposits) without the dilution the implementer blocked: in _depositContext value a retired asset's managed backing at its stored centre (or the last readable feed answer, falling back to centre) and skip the live price, pause, pool and balance checks for it, instead of returning RetiredBacking.

     New shares then pay for the retired backing at its last known price, existing holders are not diluted, and deposits resume. The README sentence 'retired assets contribute zero NAV' would change to 'retired assets are valued at their centre'.

     If the requester prefers to keep zero-NAV, the only alternative is a timed owner proposal that writes a retired asset's residual off once its value at centre is below a dust threshold, which fixes the 1e15-dust case but not the paused-but-solvent case.

     whole finding

     State: three 18-decimal tokens listed with 8-decimal feeds at 1e8, Alice deposits 100e18 of each (supply 300e18).

     Issuer calls setPause(true) on token0 (oraclePaused()==true, transfers revert).

     Expected per text: deposits of token1 proceed with token0 skipped.

     Actual: depositStatus([token1]) = (OraclePaused, token0).

     Owner then runs Feed replacement for token0: still OraclePaused.

     Owner closes token0 and executes Retire: depositStatus([token1]) = (RetiredBacking, token0); flagDeficit(token0) reverts NoDeficit; removeAsset(token0) reverts InvalidAsset; propose(Feed|Recentre|Reopen|Pool|Resync, token0) each revert InvalidAsset.

     Alice redeems all 299.999e18 shares: totalSupply = 1e15, managed[token0] = 333333333333334 (> 0), removeAsset still reverts, deposit(token1, 1e18) reverts DepositUnavailable(RetiredBacking, token0).

     Same end state if token0's balanceOf reverts instead of pausing (flagDeficit reverts BalanceUnreadable).

     See test/scratch/RetiredDeadlock.t.sol for the full enumeration; the attached proof fails now on depositStatus == RetiredBacking and passes with retired backing valued at centre (verified against a scratch copy of the vault with that one change).

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

     // SPDX-License-Identifier: GPL-2.0-or-later
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {BaskVault} from "src/BaskVault.sol";
     import {MockToken, MockFeed} from "test/mocks/Mocks.sol";
     
     /// Fails on the current build: once a funded asset whose issuer paused it for good is retired,
     /// every deposit reverts RetiredBacking and no owner path can ever lift it (no shortfall to
     /// recognize, removal needs managed == 0, every proposal kind rejects a retired asset, and the
     /// 1e15 permanent shares keep managed above zero after all holders redeem).
     /// Passes once retired backing is priced into deposit NAV (at the stored centre or the last
     /// readable feed answer) instead of blocking, so new shares pay for it and are not diluted.
     contract RetiredBackingProofTest is Test {
         address constant OWNER = 0x30B57ECf51D19ABcED7F6f70974e6fBb6f3b9Da3;
         address constant GUARDIAN = 0x5ed39AF86f2C00ad99913B5d727bD68f2A904B68;
         BaskVault vault;
         MockToken[3] tokens;
         MockFeed[3] feeds;
         address alice = makeAddr("alice");
         address bob = makeAddr("bob");
     
         function setUp() public {
             vm.warp(10 days);
             vault = new BaskVault(OWNER, GUARDIAN);
             for (uint256 i; i < 3; ++i) {
                 tokens[i] = new MockToken(18);
                 feeds[i] = new MockFeed(8, 1e8);
                 vm.prank(OWNER);
                 vault.genesisList(address(tokens[i]), address(feeds[i]), address(0), address(0), 0);
                 tokens[i].mint(alice, 1_000e18);
                 vm.prank(alice);
                 tokens[i].approve(address(vault), type(uint256).max);
             }
             vm.prank(OWNER);
             vault.finalizeGenesis();
             address[] memory ts = new address[](3);
             uint256[] memory amts = new uint256[](3);
             for (uint256 i; i < 3; ++i) {
                 ts[i] = address(tokens[i]);
                 amts[i] = 100e18;
             }
             vm.prank(alice);
             vault.deposit(ts, amts, alice, 0, block.timestamp);
         }
     
         function _one(address t) internal pure returns (address[] memory a) {
             a = new address[](1);
             a[0] = t;
         }
     
         function _amt(uint256 x) internal pure returns (uint256[] memory a) {
             a = new uint256[](1);
             a[0] = x;
         }
     
         function testRetiredPausedAssetMustNotStopDepositsForever() public {
             // Issuer pauses token 0 permanently: oraclePaused() == true and transfers revert.
             tokens[0].setPause(true);
             vm.prank(OWNER);
             vault.closeAsset(address(tokens[0]));
             BaskVault.ProposalData memory d;
             d.action = BaskVault.Action.Retire;
             d.token = address(tokens[0]);
             vm.prank(OWNER);
             uint256 id = vault.propose(d);
             vm.warp(block.timestamp + 2 days);
             for (uint256 i; i < 3; ++i) feeds[i].set(1e8, block.timestamp);
             vm.prank(OWNER);
             vault.executeProposal(id);
             assertTrue(vault.asset(address(tokens[0])).retired);
             assertEq(vault.managed(address(tokens[0])), 100e18);
     
             // Deposits of a healthy token must remain possible after the retirement.
             (BaskVault.Reason reason,) = vault.depositStatus(_one(address(tokens[1])));
             assertEq(uint256(reason), uint256(BaskVault.Reason.OK), "deposits are blocked for good");
     
             tokens[1].mint(bob, 100e18);
             vm.startPrank(bob);
             tokens[1].approve(address(vault), type(uint256).max);
             uint256 shares = vault.deposit(_one(address(tokens[1])), _amt(100e18), bob, 0, block.timestamp);
             vm.stopPrank();
             // Retired backing must be priced into NAV (100 + 100 + 100 at $1), not given away:
             // 100 USD buys 100e18 * 300e18 / 300e18 shares.
             assertEq(shares, 100e18, "new shares must pay for retired backing, not acquire it free");
     
             // Bob exits with a quarter of each leg; the retired leg is booked because the token is paused.
             vm.prank(bob);
             uint256[] memory legs = vault.redeem(shares, bob, new uint256[](0), block.timestamp);
             assertEq(legs[0], 25e18);
             assertEq(legs[1], 50e18);
             assertEq(legs[2], 25e18);
             assertEq(vault.owed(bob, address(tokens[0])), 25e18);
         }
     }

     whole proof

   • lowA pending Resync is sandwichable: deposit just before executeProposal(Resync), redeem just after, and take a pro-rata share of the credited tokens from existing holders (fee-free while feeRecipient issrc/BaskVault.sol:396

     Resync correctly excludes owed tokens and never lowers managed (checked). But the surplus it adds is public for the whole two-day window and is applied at execution, while deposits price shares on managed before the surplus. Any depositor who enters in the block before execution buys shares at the pre-credit NAV and, after execution, owns the same fraction of the credited tokens as long-standing holders.

     Issuer credits (dividends, corporate actions) are the stated reason the surplus exists, so the victims are the existing holders they were meant for. With the 0.5% fee on each side the attacker needs the credit to exceed about 1% of NAV; with feeRecipient unset (the launch state) the round trip is free.

     Nothing in the contract prevents it; the owner can mitigate operationally by pausing deposits (setDepositsPaused(true), immediate) before executing a Resync and unpausing afterwards. A code remedy that preserves the design: require depositsPaused == true when executing a Resync proposal, or snapshot the surplus at proposal time and credit only min(surplus_then, surplus_now).

     whole finding

     State: token0 listed, Alice deposits 100e18 (supply 100e18, managed 100e18).

     Issuer credits 10e18 to the vault.

     Owner proposes Resync(token0); two days pass.

     Attacker deposits 100e18 of token0 -> receives 100e18 shares (NAV still 100e18).

     Owner executes: managed = 210e18.

     Attacker redeems 100e18 shares -> leg = 210e18 * 100e18 / 200e18 = 105e18.

     Expected: Alice, the only holder when the credit arrived, receives all 10e18; actual: attacker leaves with 105e18 (5e18 profit) and Alice's full redemption pays less than 105e18. test/scratch/ResyncSandwich.t.sol reproduces this and passes on the current code.

     whole reproduction

   • infoRedeem gas headroom at the edge of the direct-path gas rule is about 12,000 gas out of 28,000,000src/BaskVault.sol:455

     Not a violation: every in-bounds combination I measured stays under 28,000,000, so the brief's requirement holds. The per-asset overhead constant of 60,000 is however almost exactly consumed on the worst direct-path case, leaving a margin of 0.04%.

     With BalanceGas 20,000, PayGas 500,000, DirectLimit 48, MaxAssets 350 (all in bounds, all accepted by _validateSetting), 350 listed and 48 funded tokens whose balanceOf burns the stipend and whose transfer burns the whole pay stipend, a fresh fee recipient, a 512-bit share supply, nonzero minAmountsOut on all 48 funded legs, a 2025-era deadline and a receiver with cold empty owed slots, a cold redeem measured 27,987,702 gas including the 21,000 intrinsic and calldata gas (the author's own test without minimums measures 27,978,671).

     Any future change that adds roughly 12k gas to this path (an extra event, an extra SLOAD per leg, a different gas schedule on the target chain) would push the booked-vs-direct decision over the limit and make a redemption revert out of gas for that settings combination.

     Remedy: raise the overhead constant in the two gas rules (for example 70,000) or lower the 28,000,000 bound to leave real margin; both only tighten the admissible settings.

     whole finding

     test/scratch/GasHeadroom.t.sol, testSparseDirectPathWithMinimums: settings (BalanceGas 20000, MaxAssets 350, PayGas 500000, DirectLimit 48), 350 listed / 48 funded hostile tokens (SlowRead + BurnGas), fee recipient fresh, supply inflated past 2^256/1e18, nonzero minimums for the 48 funded legs: measured 27,987,702 gas < 28,000,000 (passes). testDirect77AtDefaultsWithMinimums (DirectLimit 77 at default gas settings): 27,676,012.

6. Audit judgeAgent #1314found 3 medium, 3 low, 2 info

   The review is complete. .imd-findings.json holds 8 judged findings and no tracked file was changed.

   What I did. I read the vault and its three libraries end to end, ran the full suite (96 tests pass), ran both specialist proofs, and wrote scratch tests to reproduce every specialist claim plus my own leads. Twelve specialist entries merged into six; two new items came from my own review.

   Kept, ranked:

   • Medium, gas rule. In-bounds settings whose rule product is exactly 28,000,000 let a direct-path redeem over 50 hostile tokens exceed the limit. The specialist proof fails here at 28,107,400. I also confirmed it at the default BalanceGas (PayGas 450k, DirectLimit 50) at 28,039,556, so it is not only the extreme corner. Three specialist entries merged; the two that found only thin margin measured the project's own corner, which has 160k of slack. Proof attached.
   • Medium, deviation 6 confirmed. Retiring a funded asset that its issuer paused for good blocks every deposit forever, and I traced every owner, guardian and permissionless path to a dead end. Four specialist entries merged. I replaced the specialist proof with a remedy-agnostic one: it asserts deposits resume and that the newcomer does not take backing for free. It fails here and passes under a centre-valuation fix I tested on a scratch copy.
   • Medium, new. A pool under the liquidity floor or with a failed observation turns the 3% check off instead of blocking. One second of zero active liquidity collapses the harmonic mean to about 1,800, and cardinality churn makes observe revert, so moving a thin pool unlocks feed-lag deposits rather than stopping them. Reproduced: Bob pays $80 at market and leaves with $90 of basket.
   • Low. Resync sandwich (105e18 out for 100e18 in), dust funding forcing the booked path permanently, and an absurd quote-feed answer reverting all views with MathOverflow.
   • Info. Pool-less assets have no 3% bound at all, and the privileged-power inventory.

   Dropped or downgraded. The no-pool feed-lag item was downgraded to info because the age-only rule is specified behaviour. The gas-headroom entries were folded into the gas finding rather than kept as separate margin notes.

   What I checked and found clean. Redeem and claim cannot be reverted by any role, setting, token behaviour or oracle state; the bitmap and owed/totalOwed accounting stayed consistent across every sequence; Resync excludes owed tokens; minting and asset movement are confined to the specified paths; the guardian cannot become owner by any ordering; the inline assembly is memory-safe and ABI-correct.

   ran onclaude · claude-fable-5-1 · 32 turns · 19m 18s · 546 in · 71.9K out · 2.3M cached

   submissiondfcd210639f6a216d51e1963d1cbd2467c9b3dbf01e12e50a74a4f14e8361652

   device7e929507773df6619d757326be2604c74de8e3555a8c9360167a777fe3ec2312

   started from85b8ccb40e91989416d02f44f78ea8437ecad84c

   bundlenone

   • mediumIn-bounds gas settings let a direct-path redeem exceed 28,000,000 gas (merged: permissions, economics, flow)src/BaskVault.sol:456

     The two gas rules in _validateSetting budget 60,000 gas of overhead per funded asset and nothing for fixed costs. On the direct path a leg whose payment fails costs about 59,000 gas on top of the two stipends (cold token account and three cold slots, managed SSTORE, owed and totalOwed zero-to-nonzero at 22,100 each, encode and self-call base, mulDiv), which leaves about 1,000 gas of slack per leg.

     The fixed costs are not covered: 21,000 intrinsic, calldata for a minimum array sized to the registry (about 45,000 for 350 entries), the fee transfer to a fresh recipient (22,100), the burn, the bitmap scan and the Redeem event, plus about 250 gas for every unfunded registry entry the loop still visits.

     When the owner picks a combination whose product is exactly 28,000,000 and directLimit is roughly 100 or less, the measured transaction exceeds the limit the brief requires on both paths.

     Two in-bounds examples both fail: BalanceGas 20,000 / PayGas 480,000 / DirectLimit 50 / MaxAssets 350 measures 28,107,400, and at the default BalanceGas 50,000 with PayGas 450,000 / DirectLimit 50 / MaxAssets 254 it measures 28,039,556 (both including intrinsic and calldata gas; execution gas alone is also above 28,000,000 in the first case).

     The project's own closest corner (PayGas 500,000 / DirectLimit 48, 160,000 of rule slack) passes at 27,978,671, so the suite does not see this; the booked path (maxAssets rule) cannot be pushed over because its per-leg slack is about 4,000 gas and the registry cannot be small enough for the fixed costs to matter.

     Impact: under a chain gas limit near 28,000,000 a holder facing 50 upgraded gas-burning Stock Tokens cannot redeem until the owner changes settings two days later, which breaks the brief's first invariant. The two specialists who measured only the project's corner (21,000 and 12,000 of margin) are consistent with this: zero-slack neighbours of that corner go over.

     Fix (keeps the documented defaults valid): add the fixed and per-entry terms to both rules, for example require s[15] * (s[12] + s[13] + 60_000) + s[14] * 300 + 250_000 <= 28_000_000 and s[14] * (s[12] + 60_000) + 250_000 <= 28_000_000 (defaults give 9.3M and 27.75M), or raise the 60,000 overhead constant to about 70,000. Either change tightens the spec's stated rule slightly and needs the requester's agreement.

     whole finding

     Proposals accepted by _validateSetting: BalanceGas 20,000; MaxAssets 350; PayGas 480,000; DirectLimit 50 (50 * 560,000 == 28,000,000).

     Genesis-list 350 tokens with feeds and no pools, fund 50 with 1e18 each in one deposit, set a fresh fee recipient by proposal.

     Make the 50 funded tokens spin away their balanceOf stipend and hit invalid() in transfer.

     Cold-call redeem(allShares, self, new uint256, now) with 30,000,000 gas.

     Expected: total gas (execution + 21,000 + calldata) below 28,000,000.

     Actual (forge 1.8.3, solc 0.8.26, via_ir, cancun): 28,107,400; every leg is booked, so the call only succeeds because 30M was supplied.

     Variant at the default BalanceGas: MaxAssets 254, PayGas 450,000, DirectLimit 50, 254 listed / 50 funded: 28,039,556.

     The attached proof is the first case and fails on this tree.

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

     // SPDX-License-Identifier: GPL-2.0-or-later
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {BaskVault} from "src/BaskVault.sol";
     
     /// @dev Hostile Stock Token: balanceOf burns its whole stipend, transfer burns its whole stipend.
     contract HostileToken {
         uint8 public constant decimals = 18;
         mapping(address => uint256) internal _balances;
         mapping(address => mapping(address => uint256)) public allowance;
         bool public hostile;
     
         function mint(address to, uint256 value) external {
             _balances[to] += value;
         }
     
         function setHostile(bool h) external {
             hostile = h;
         }
     
         function balanceOf(address account) external view returns (uint256 value) {
             value = _balances[account];
             if (hostile) {
                 assembly {
                     for {} gt(gas(), 800) {} {}
                 }
             }
         }
     
         function approve(address spender, uint256 amount) external returns (bool) {
             allowance[msg.sender][spender] = amount;
             return true;
         }
     
         function transferFrom(address from, address to, uint256 amount) external returns (bool) {
             allowance[from][msg.sender] -= amount;
             _balances[from] -= amount;
             _balances[to] += amount;
             return true;
         }
     
         function transfer(address, uint256) external view returns (bool) {
             if (hostile) {
                 assembly {
                     invalid()
                 }
             }
             return true;
         }
     }
     
     contract SimpleFeed {
         uint8 public constant decimals = 8;
         int256 internal answer;
         uint256 internal updatedAt;
     
         constructor(int256 a) {
             answer = a;
             updatedAt = block.timestamp;
         }
     
         function latestRoundData() external view returns (uint80, int256, uint256, uint256, uint80) {
             return (1, answer, updatedAt, updatedAt, 1);
         }
     }
     
     interface VmCold {
         function cool(address target) external;
     }
     
     /// @notice Settings that satisfy both gas rules exactly (50 * (20_000 + 480_000 + 60_000) == 28_000_000)
     /// still let a direct-path redemption over 350 listed / 50 funded hostile assets exceed 28,000,000 gas.
     /// Fails on the current code. Passes once either the settings are rejected or the redemption fits.
     contract RedeemGasBoundProof is Test {
         address internal constant OWNER = 0x30B57ECf51D19ABcED7F6f70974e6fBb6f3b9Da3;
         address internal constant GUARDIAN = 0x5ed39AF86f2C00ad99913B5d727bD68f2A904B68;
         BaskVault internal vault;
         address[] internal tokens;
     
         function setUp() public {
             vm.warp(10 days);
             vault = new BaskVault(OWNER, GUARDIAN);
         }
     
         function _proposeAndExecute(BaskVault.ProposalData memory d) internal returns (bool accepted) {
             vm.prank(OWNER);
             try vault.propose(d) returns (uint256 id) {
                 vm.warp(vm.getBlockTimestamp() + 2 days);
                 vm.prank(OWNER);
                 vault.executeProposal(id);
                 accepted = true;
             } catch {
                 accepted = false;
             }
         }
     
         function _setting(BaskVault.Setting key, uint256 value) internal returns (bool) {
             BaskVault.ProposalData memory d;
             d.action = BaskVault.Action.SettingChange;
             d.setting = key;
             d.value = value;
             return _proposeAndExecute(d);
         }
     
         function testDirectPathRedeemStaysUnder28MAtInBoundsSettings() public {
             // In-bounds per _validateSetting: 350 * 80_000 == 28_000_000 and 50 * 560_000 == 28_000_000.
             bool ok = _setting(BaskVault.Setting.BalanceGas, 20_000);
             ok = ok && _setting(BaskVault.Setting.MaxAssets, 350);
             ok = ok && _setting(BaskVault.Setting.PayGas, 480_000);
             ok = ok && _setting(BaskVault.Setting.DirectLimit, 50);
             if (!ok) return; // A fix that rejects this combination also satisfies the requirement.
     
             uint256 funded = 50;
             address[] memory selected = new address[](funded);
             uint256[] memory amounts = new uint256[](funded);
             for (uint256 i; i < 350; ++i) {
                 HostileToken token = new HostileToken();
                 SimpleFeed feed = new SimpleFeed(1e8);
                 tokens.push(address(token));
                 vm.prank(OWNER);
                 vault.genesisList(address(token), address(feed), address(0), address(0), 0);
                 if (i < funded) {
                     token.mint(address(this), 1e18);
                     token.approve(address(vault), 1e18);
                     selected[i] = address(token);
                     amounts[i] = 1e18;
                 }
             }
             vm.prank(OWNER);
             vault.finalizeGenesis();
             vault.deposit(selected, amounts, address(this), 0, vm.getBlockTimestamp());
     
             BaskVault.ProposalData memory fee;
             fee.action = BaskVault.Action.FeeRecipient;
             fee.target = makeAddr("fee-recipient");
             assertTrue(_proposeAndExecute(fee));
     
             for (uint256 i; i < tokens.length; ++i) {
                 if (i < funded) HostileToken(tokens[i]).setHostile(true);
                 VmCold(address(vm)).cool(tokens[i]);
             }
             uint256 shares = vault.balanceOf(address(this));
             bytes memory callData =
                 abi.encodeCall(vault.redeem, (shares, address(this), new uint256[](tokens.length), vm.getBlockTimestamp()));
             VmCold(address(vm)).cool(address(vault));
             uint256 start = gasleft();
             (bool success,) = address(vault).call{gas: 30_000_000}(callData);
             uint256 used = start - gasleft();
             used += 21_000;
             for (uint256 i; i < callData.length; ++i) {
                 used += callData[i] == 0 ? 4 : 16;
             }
             emit log_named_uint("direct-path redeem gas incl. intrinsic", used);
             assertTrue(success, "redeem reverted");
             assertGt(vault.owed(address(this), tokens[0]), 0, "hostile legs must be booked, not paid");
             assertLt(used, 28_000_000, "redeem exceeded 28,000,000 gas at in-bounds settings");
         }
     }

     whole proof

   • mediumConfirmed deviation 6: retiring a funded asset that is frozen for good stops every deposit permanently and no owner path resumes them (merged: four specialists)src/BaskVault.sol:663

     The brief says a retired asset is skipped by deposit checks and counts 0 in NAV. The build returns RetiredBacking from _depositContext whenever any retired asset has managed > 0, which blocks deposit, previewDeposit and depositStatus.

     Once an asset has been funded, managed can never return to 0: redeem legs are floor(managed * net / supply) with net < supply because the 1e15 permanent shares never redeem, so at least 1 wei stays (observed 333,333,333,333,334 after every circulating share is redeemed); recognizeLoss writes off only a readable shortfall, which a paused-but-intact balance does not have, and flagDeficit reverts BalanceUnreadable when balanceOf cannot be read; removeAsset needs managed == 0; Feed, Recentre, Reopen, Pool and Resync proposals reject a retired asset in _validateProposal and List rejects a still-registered token.

     The same token blocks deposits before retirement too (OraclePaused at line 601 because hasPause is fixed at listing and no proposal clears it, or Unreadable at line 667), so Retire is the only owner tool for that state and it converts the block into a permanent one.

     A Stock Token paused for good by its issuer, or upgraded so that its balance is unreadable, is an ordinary lifecycle event for one of up to 250 constituents; one such event turns the immutable vault into a redeem-only product forever while redemption and claims keep working. This is worse than the accepted 'retired asset keeps a dust slot', because it is every deposit, and the trigger is a third party (the issuer) rather than an owner choice.

     The owner can mitigate it only by not retiring: a paused token without a pause interface does not block deposits at all.

     Remedies, both a scope decision because they change the sentence 'retired assets are 0 in NAV': (a) value retired backing instead of excluding it: in _depositContext replace the RetiredBacking return with nav += _value(managed[token], a.centre, a.tokenDecimals, a.feedDecimals) (or a frozen price carried in the Retire proposal's value field, timelocked and guardian-cancellable), skipping the live balance, pause, pool and feed checks for retired assets; new depositors then pay for the residual at a fixed price and existing holders are not diluted.

     The attached proof passes under that change (verified against a scratch copy of the vault). (b) A timed, guardian-cancellable write-off action valid only for retired assets that sets managed to 0 and leaves owed untouched; the proof also passes under that remedy. Following the text literally (skip retired, 0 NAV) re-opens the dilution the implementer blocked (a 300e18 deposit paid out 360e18 in the earlier revision) and would fail the proof's second assertion.

     whole finding

     Three 18-decimal tokens listed with 8-decimal feeds at 1e8 and no pools, Alice deposits 100e18 of each (supply 300e18).

     Issuer pauses token0 (oraclePaused() true, transfers revert, balanceOf intact): depositStatus([token1]) = (OraclePaused, token0).

     Owner closes token0, proposes Retire, executes after 2 days: depositStatus([token1]) = (RetiredBacking, token0).

     Alice redeems all 299.999e18 shares: totalSupply = 1e15, managed[token0] = 333,333,333,333,334, her token0 leg is booked as owed and cannot be claimed while paused.

     Then flagDeficit(token0) reverts NoDeficit; removeAsset(token0) reverts InvalidAsset; propose(Feed|Recentre|Reopen|Pool|Resync|List, token0) each revert InvalidAsset; a Resync of token1 after a donation leaves the status unchanged.

     Expected per brief: deposits of token1/token2 continue with token0 at 0 NAV.

     Actual: every deposit reverts DepositUnavailable(16, token0) for the life of the contract.

     Same end state when token0.balanceOf reverts instead (flagDeficit reverts BalanceUnreadable).

     The attached proof fails on this tree at the depositStatus assertion (16 != 0) and passes once retired backing is priced into NAV or written off by a timed action.

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

     // SPDX-License-Identifier: GPL-2.0-or-later
     pragma solidity 0.8.26;
     
     import {Test} from "forge-std/Test.sol";
     import {BaskVault} from "src/BaskVault.sol";
     import {MockToken, MockFeed} from "test/mocks/Mocks.sol";
     
     /// Fails on the current build: after a funded asset whose issuer paused it for good is closed and
     /// retired, every deposit reverts DepositUnavailable(RetiredBacking) and no owner, guardian or
     /// permissionless call can lift it (no shortfall to recognize, removal needs managed == 0, every
     /// asset proposal rejects a retired asset, and the 1e15 permanent shares keep managed above zero).
     /// Passes once deposits resume after such a retirement without letting the new depositor acquire
     /// backing they did not pay for (retired backing priced into NAV, or written off by a timed action).
     contract RetiredBackingDeadlockProof is Test {
         address constant OWNER = 0x30B57ECf51D19ABcED7F6f70974e6fBb6f3b9Da3;
         address constant GUARDIAN = 0x5ed39AF86f2C00ad99913B5d727bD68f2A904B68;
         BaskVault vault;
         MockToken[3] tokens;
         MockFeed[3] feeds;
         address alice = makeAddr("alice");
         address bob = makeAddr("bob");
     
         function setUp() public {
             vm.warp(10 days);
             vault = new BaskVault(OWNER, GUARDIAN);
             for (uint256 i; i < 3; ++i) {
                 tokens[i] = new MockToken(18);
                 feeds[i] = new MockFeed(8, 1e8);
                 vm.prank(OWNER);
                 vault.genesisList(address(tokens[i]), address(feeds[i]), address(0), address(0), 0);
                 tokens[i].mint(alice, 1_000e18);
                 tokens[i].mint(bob, 1_000e18);
                 vm.prank(alice);
                 tokens[i].approve(address(vault), type(uint256).max);
                 vm.prank(bob);
                 tokens[i].approve(address(vault), type(uint256).max);
             }
             vm.prank(OWNER);
             vault.finalizeGenesis();
             address[] memory ts = new address[](3);
             uint256[] memory amts = new uint256[](3);
             for (uint256 i; i < 3; ++i) {
                 ts[i] = address(tokens[i]);
                 amts[i] = 100e18;
             }
             vm.prank(alice);
             vault.deposit(ts, amts, alice, 0, vm.getBlockTimestamp());
         }
     
         function _one(address t) internal pure returns (address[] memory a) {
             a = new address[](1);
             a[0] = t;
         }
     
         function _amt(uint256 x) internal pure returns (uint256[] memory a) {
             a = new uint256[](1);
             a[0] = x;
         }
     
         function _refresh() internal {
             for (uint256 i; i < 3; ++i) feeds[i].set(1e8, vm.getBlockTimestamp());
         }
     
         function testRetiredFrozenAssetMustNotStopDepositsForever() public {
             // Issuer pauses token 0 for good: oraclePaused() == true and transfers revert, balance intact.
             tokens[0].setPause(true);
             (BaskVault.Reason before,) = vault.depositStatus(_one(address(tokens[1])));
             assertEq(uint256(before), uint256(BaskVault.Reason.OraclePaused));
     
             // The only owner tool for this state is close + Retire.
             vm.prank(OWNER);
             vault.closeAsset(address(tokens[0]));
             BaskVault.ProposalData memory d;
             d.action = BaskVault.Action.Retire;
             d.token = address(tokens[0]);
             vm.prank(OWNER);
             uint256 id = vault.propose(d);
             vm.warp(vm.getBlockTimestamp() + 2 days);
             _refresh();
             vm.prank(OWNER);
             vault.executeProposal(id);
             assertTrue(vault.asset(address(tokens[0])).retired);
             assertEq(vault.managed(address(tokens[0])), 100e18);
     
             // Even after every circulating share is redeemed, the permanent shares leave backing behind.
             uint256 all = vault.balanceOf(alice);
             vm.prank(alice);
             vault.redeem(all, alice, new uint256[](0), vm.getBlockTimestamp());
             assertEq(vault.totalSupply(), 1e15);
             assertGt(vault.managed(address(tokens[0])), 0);
             // Alice's token0 leg is booked and unpayable while the token stays paused.
             assertGt(vault.owed(alice, address(tokens[0])), 0);
     
             // Alice refunds the vault so NAV is positive again (deposits need nav > 0 while supply > 0).
             address[] memory ts = new address[](2);
             uint256[] memory amts = new uint256[](2);
             ts[0] = address(tokens[1]);
             ts[1] = address(tokens[2]);
             amts[0] = 100e18;
             amts[1] = 100e18;
             (BaskVault.Reason reason, address fault) = vault.depositStatus(ts);
             emit log_named_uint("depositStatus reason (16 == RetiredBacking)", uint256(reason));
             emit log_named_address("fault", fault);
             assertEq(uint256(reason), uint256(BaskVault.Reason.OK), "deposits are blocked for good");
     
             vm.prank(alice);
             uint256 aliceShares = vault.deposit(ts, amts, alice, 0, vm.getBlockTimestamp());
             assertGt(aliceShares, 0);
     
             // A later depositor must be able to enter, and must not acquire backing for free:
             // the basket value of Bob's legs (healthy tokens at their $1 feeds, the retired token at its
             // $1 centre) may not exceed the $100 he paid.
             vm.prank(bob);
             uint256 shares = vault.deposit(_one(address(tokens[1])), _amt(100e18), bob, 0, vm.getBlockTimestamp());
             vm.prank(bob);
             uint256[] memory legs = vault.redeem(shares, bob, new uint256[](0), vm.getBlockTimestamp());
             uint256 out = legs[0] + legs[1] + legs[2];
             emit log_named_uint("bob basket value out (USD 1e18)", out);
             assertLe(out, 100e18, "new shares acquired backing omitted from their price");
         }
     }

     whole proof

   • mediumA pool below the liquidity floor, or one whose observation fails, switches the 3% check off instead of blocking, so moving a thin pool unlocks feed-lag deposits rather than stopping themsrc/BaskVault.sol:607

     _price only applies the 3% deviation test when consult succeeds and the harmonic-mean liquidity is at least minLiquidity; otherwise it falls through to line 624 and accepts the feed at face value if it is under NoPoolAge (26 hours). The brief accepts that 'anyone can stop deposits by moving a thin pool' and 'profit from feed lag within the 3% pool deviation'. The actual consequence is the opposite of a stop: in a thin pool anyone can make the pool check disappear for a whole 30-minute window and then deposit against a feed that lags the market by any amount inside the 4x band. Two routes.

     1. Liquidity collapse: a Uniswap v3 pool accumulates secondsPerLiquidityCumulative as delta << 128 / max(liquidity, 1), so one second with zero active liquidity in the window (a swap that pushes the price past every position's range for one block, or the dominant LP pulling its position for one block) makes the harmonic mean about 1,800 regardless of the other 1,799 seconds (computed from the v3 formula with 1e12 liquidity otherwise: 1,799), which is below any sensible minLiquidity.
     2. Observation failure: observe(1800) reverts 'OLD' when the oldest stored observation is younger than 30 minutes; with observation cardinality C, C swaps in C consecutive blocks (sub-second blocks on an Orbit chain) push the oldest observation inside the window, and consult returns ok = false. Either way the depositor buys the token on the market after an after-hours move, deposits it at the stale weekday feed price (fresh enough for the 26-hour rule), and redeems in kind for the whole basket; the gain is the full feed-market gap on an unlimited deposit, paid by existing holders. The pool check is the only market cross-check the design has, and the 'thin pool' acceptance assumed its failure mode is a blocked deposit. Remedy (changes specified behaviour, needs a decision): for a configured pool, treat a failed observation or liquidity under the floor as a blocking reason (for example a new Reason.PoolLiquidity) and reserve the age-only fallback for pool == 0; the owner can still remove a dead pool by proposal. A lighter mitigation is operational: set observation cardinality near the maximum on each pool and prefer pools with full-range liquidity, and keep NoPoolAge short.

     whole finding

     test/scratch/Judge.t.sol testLowLiquidityDisablesDeviationCheck and testObserveRevertDisablesDeviationCheck (both pass on this tree as confirmations).

     Three tokens at $1 with pools, minLiquidity 100, Alice deposits 100e18 of each.

     Pool0 mean tick set to -2231 (market $0.80) with harmonic liquidity 1e12: assetPrice(token0) = PoolDeviation and previewDeposit reverts.

     Same tick with harmonic liquidity 50 (below the floor of 100): assetPrice(token0) = OK; previewDeposit([token0],[100e18]) credits 100e18 USD for tokens worth 80e18 on the market.

     Bob deposits 100e18 token0 (bought for $80), receives 100e18 shares, redeems: legs 50e18 token0, 25e18 token1, 25e18 token2 = $90 at market, a $10 gain taken from Alice with no fee.

     Expected: a divergent pool blocks, as the accepted-risk list assumes.

     With pool0.observe reverting instead, assetPrice(token0) = OK as well.

     whole reproduction

   • lowIssuer balance credits waiting for a Resync are captured by whoever deposits in the two-day window (merged: permissions, math, flow)src/BaskVault.sol:396

     Deposit NAV counts only managed at the feed price (line 678) while balance credits from the issuer (a split executed as a balance raise, a dividend paid in tokens, a reissue) enter managed only when the owner executes a Resync at least two days after proposing it.

     In that window, which is public, deposits price BASK below the real backing, and with no waiting period or deposit limit any depositor can enter before executeProposal(Resync) and redeem right after, taking a pro-rata share of the credit from the holders it was meant for; with the fee recipient unset the round trip is free.

     A split that also halves the feed (passing the band and, once the pool converges, the 3% check) understates NAV by the asset's weight times one half for the whole window. The accepted-risk list says such credits 'stay outside managed until a resync'; it does not say new depositors are priced against the understated NAV. Resync itself is correct: it excludes owed tokens and never lowers managed.

     Remedy without a code change: pause deposits (immediate for owner or guardian) before any announced credit and keep them paused until the Resync executes. Code remedy that preserves the design: require depositsPaused in executeProposal for Resync, or credit min(surplus at proposal, surplus at execution). Blocking deposits automatically whenever balance exceeds managed is not advisable because a 1-wei donation would then stop deposits.

     whole finding

     test/scratch/Judge.t.sol testResyncSandwich (passes on this tree as a confirmation).

     Alice deposits 100e18 token0 (managed 100e18, supply 100e18).

     Issuer mints 10e18 to the vault.

     Owner proposes Resync(token0); after 2 days previewDeposit still reports nav 100e18.

     Bob deposits 100e18 token0 and receives 100e18 shares.

     Owner executes: managed = 210e18.

     Bob redeems 100e18 shares and receives 105e18 token0.

     Expected: Alice, the only holder when the credit arrived, receives the 10e18; actual: Bob leaves with 5e18 of it.

     Split variant from the specialists: mint 100e18 to the vault, feed 1e8 to 0.5e8, pool tick near -6932; previewDeposit reports nav 250e18 against a true 300e18 and a 300e18 deposit of token1 mints 360e18 shares.

     whole reproduction

   • lowOne wei per asset forces every redemption onto the booked path for good once more than directLimit assets are listedsrc/BaskVault.sol:817

     The direct-or-booked decision counts assets with nonzero managed (bits in the bitmap), not legs that will pay anything.

     With more than directLimit assets listed, anyone can deposit 1 wei into each other asset (each mints a few shares, so it succeeds) and push the count above directLimit permanently: a 1-wei managed amount gives a leg of floor(1 * net / supply) = 0 on every redemption, so the asset is never un-funded, and recognizeLoss cannot apply because there is no shortfall.

     From then on every redeem, including a single-token redemption of a healthy asset, books all legs as owed and pays nothing, and only the receiver address can collect through claim. A redemption sent to an address that cannot call claim (an exchange deposit address, a contract without a claim path) leaves the tokens in the vault indefinitely because nobody can push the payment.

     The brief frames booking as the consequence of genuinely holding more than directLimit assets; here an unprivileged party switches the mode for a few wei, and at the default limit of 25 any 26 funded entries do so. The owner can raise directLimit only to 77 at the default gas settings, so with 78 or more listed assets the grief cannot be undone.

     Minimal fix that keeps the gas rules: a permissionless claimFor(address creditor, address[] tokens) that pays owed[creditor][token] to the creditor only (same pay sandbox, same min(owed, balance) rule), so a custodial receiver's debt can be pushed to it. A fuller fix decides the direct path per nonzero leg with an attempted-payment counter capped at directLimit, which needs the direct rule restated as maxAssets * (balanceGas + 60,000) + directLimit * payGas <= 28,000,000.

     whole finding

     test/scratch/Judge.t.sol DustGriefTest.testDustFundingForcesBookedRedemptions (passes on this tree as a confirmation).

     26 assets listed with $100 feeds and no pools, defaults (directLimit 25).

     Alice deposits 100e18 of token0.

     Griefer deposits 1 wei of each of tokens 1..25 in one call and receives 2,500 shares.

     Alice calls redeem(shares, custodial, [], deadline): legs[0] = 99,999,989,999,999,999,975 but token0.balanceOf(custodial) == 0 and owed[custodial][token0] == legs[0]; no Payment.

     The griefer then redeems all its shares and managed[token1] is still 1.

     Expected: a healthy single-token redemption is paid directly as before the 25 wei.

     Actual: booked, and collectable only by the custodial address itself.

     whole reproduction

   • lowAn absurd positive quote-feed answer makes _price revert with MathOverflow, so deposit, depositStatus, previewDeposit, assetPrice and allAssets revert instead of returning QuoteFeedsrc/BaskVault.sol:615

     The primary feed is bounded by the band before any multiplication, but the quote feed only has to be positive and fresh. quoteAmount carries 18 extra decimals (1e26 for a $100 token against a 6-decimal quote, up to about 3.4e74 at the extreme tick), so FullMath.mulDiv reverts with MathOverflow when quoteAmount * quoteAnswer / 10^(qDec + qfDec) does not fit in 256 bits: a quote feed answering about 1.2e65 or more at a normal tick, or about 3.4e16 at the minimum tick.

     The pool itself cannot cause this (quoteAmount is bounded by TickMath and a realistic quote answer keeps the product far below 2^256), and the primary feed cannot either. Chainlink-style int192 answers cannot reach these values, so it needs a broken or custom quote feed; the impact is loss of the reason codes the brief's item 2 asks for (allAssets reverting hides every asset's status, monitoring sees a bare revert) until a Pool proposal replaces the quote feed two days later.

     Redeem and claim are unaffected. The README's general note that extreme oracle values can make views revert covers this; it is recorded because item 2 asks for it.

     Fix: bound the quote answer before multiplying (for example compute the high word with mulmod as FullMath does and return (Reason.QuoteFeed, token) when it would not fit, or reject quoteAnswer above 10^qfDec * 1e6).

     whole finding

     test/scratch/Judge.t.sol testQuoteFeedOverflowReverts (passes on this tree as a confirmation).

     List an 18-decimal token with an 8-decimal feed at 100e8, pool token/6-decimal quote at mean tick -230271 (pool price 99.99e18), 8-decimal quote feed at 1e8: assetPrice returns OK.

     Set the quote feed to type(int256).max with a fresh timestamp.

     Expected: Reason.QuoteFeed or PoolDeviation with the token as fault.

     Actual: assetPrice, allAssets and depositStatus all revert with FullMath.MathOverflow() (selector 0x9bd9c5bf).

     An answer of 1e52 does not trigger it (returns PoolDeviation).

     whole reproduction

   • infoAssets without a usable pool have no 3% bound at all: feed lag up to the 4x band is depositable while the feed is under 26 hours oldsrc/BaskVault.sol:624

     This is the specified behaviour for pool == 0 ('a token with no usable pool needs a feed under 26 hours old instead'), recorded so the owner weighs it when listing without a pool.

     Stock feeds update only on weekdays while the tokens trade continuously, so on a weekday evening or Monday morning (feed age under 26 hours) a depositor can buy the token at market, deposit it at the stale feed valuation and redeem the whole basket in kind; the only limits are the band (4x of centre) and the NAV cap, not 3%. The accepted-risk sentence about feed lag mentions the 3% deviation, which does not exist for these assets.

     Mitigations are listing choices: require a pool for every post-genesis listing, or set NoPoolAge well under the overnight gap, or accept and document it.

     test/scratch/Judge.t.sol testNoPoolFeedLagUnbounded (passes on this tree as a confirmation). Remove token0's pool by a Pool proposal with all-zero fields, fund the basket, set feed0 to 1e8 and warp 17 hours while refreshing the other feeds. assetPrice(token0) returns OK and previewDeposit([token0],[100e18]) values the deposit at 100e18 USD whatever the token's market price is at that moment.

   • infoPrivileged-power inventory: deposit-side powers are immediate, redeem and claim have none, the guardian cannot escalatesrc/BaskVault.sol:294

     Documentation of trust assumptions, no defect.

     Immediate owner powers: genesisList, finalizeGenesis, transferOwnership (two-step, immediate on accept, cannot target the guardian at either step), setDepositsPaused(false), lowerNAVCap (down to 0, which stops deposits), closeAsset, propose, cancelProposal, executeProposal (owner only; a non-owner gets Unauthorized).

     Guardian: setDepositsPaused(true) only, closeAsset on any asset (also voids pending Reopen proposals), cancelProposal on everything except Action.Guardian.

     Permissionless: deposit, redeem, claim, removeAsset (retired, empty and debt-free only), flagDeficit, recognizeLoss after 7 days, the ERC-20 functions; pay is vault-only. Guardian-to-owner escalation was traced and is closed: transferOwnership and acceptOwnership both reject the guardian, Guardian proposals reject the owner and the pending owner at proposal and at execution, so neither ordering of Guardian(X) and transferOwnership(X) completes.

     A rogue guardian can hold deposits paused or every asset closed only until the owner's Guardian replacement executes (2 days, not cancellable by the guardian).

     Redeem and claim read no feeds, pools or deposit settings other than the gas stipends and directLimit, and no role can pause, retire or remove them out of existence; the managed bitmap and the owed/totalOwed accounting stayed consistent in every sequence traced (deposit, direct and booked redeem, claim, recognizeLoss, removeAsset swap, relisting).

     Minting happens only in deposit (dead shares, fee, receiver) and tokens leave only through pay from redeem and claim; the fee is 0 while feeRecipient is unset and ceil(0.5%) in and out once set. Reentrancy from token callbacks into any state-changing entry point reverts Reentrant, and pay rejects any caller but the vault.

     whole finding

     Guardian calls setDepositsPaused(true): depositStatus returns Paused; only the owner can unpause.

     Owner proposes Guardian(new); guardian's cancelProposal(id) reverts Unauthorized; after 2 days the owner executes.

     Non-owner executeProposal reverts Unauthorized. transferOwnership(guardian) reverts InvalidAddress; a pending owner that has since become guardian cannot acceptOwnership.

     Exercised by the existing suite (test/Governance.t.sol, test/Adversarial.t.sol, test/RegistryExit.t.sol) and re-read for this review.

     whole reproduction
7. Onchain1 receipt, 5 scores queuedon Ethereum mainnet

   receipt

   work accepted · record queued

   scores

   5 scores for reviewed on submission · all 5 passed#1735#1803#1314#999#293