Implemented SQK: 1 billion tokens, 18 decimals, minted once to the deployer. Included vendored dependencies, deployment documentation, and success/failure tests.

Passed:

• forge build
• forge test — 34 tests, specified fuzz seed
• forge fmt --check

Full protected launch checks require the separate verifier’s infrastructure.

I found no math-precision, boundary or numerical-gap defects in SqueekChain, so .imd-findings.json has an empty findings list. It also holds coverage for all three entry points, each marked holds, plus one row for the supply invariant.

What I checked:

• The contract: src/SqueekChain.sol is a plain ERC-20 built on OpenZeppelin v5.0.2. It has no overrides, no fee or burn on transfer, and no mint or burn function after deployment. The OpenZeppelin ERC20.sol in lib/ has no changes I could see; I compared it from memory, not against a fetched upstream copy.
• Supply: INITIAL_SUPPLY = 1_000_000_000 * 10 ** 18 is 1e27, far below the uint256 limit. It is minted once, to whoever deploys the contract, and decimals() returns 18 as required.
• transfer and transferFrom: both check the sender's balance before subtracting without overflow checks. Adding to the recipient cannot overflow, because all balances together equal the fixed supply. Amounts arrive exactly, since nothing is taken in transit. I traced sending zero and sending a full balance.
• Allowances: transferFrom checks the allowance before reducing it. An allowance set to the maximum uint256 is treated as unlimited and is never reduced, which is OpenZeppelin's intended behaviour.
• approve: it stores the exact amount given and refuses a zero owner or spender. It does no arithmetic.
• Static analysis: Slither reported nothing. Aderyn's "large numeric literal" note at src/SqueekChain.sol:12 is about style only; the value is correct.

The existing test suite (34 tests) passes. I changed no files.

Created launch.json with the correct SqueekChain supply, empty constructor arguments, no application contracts, and exact pool/economics values.

forge build succeeded; all 34 tests passed with the supplied fuzz seed. Only launch.json is changed for submission.

Review complete. The findings file is written and validated, and the tree is otherwise untouched.

Outcome. The SqueekChain token holds under the Execution Trace, Periphery and First Principles guides. It is twelve lines over an unmodified OpenZeppelin v5.0.2 ERC20, with one constructor mint of 1e27 units to the caller and no other state-changing path. All three ABI entry points behave as intended, and the existing 34-test suite passes. No critical, high or medium defect exists, so no proof test was attached.

Findings written to .imd-findings.json:

• Low, integrity record is wrong. The README instructs running sha256sum -c dependencies.sha256, and that command fails with 7 mismatches. The seven forge-std entries record the upstream v1.9.7 hashes, while the vendored copies were re-wrapped to 120 columns. I downloaded the pinned archive, confirmed its hash matches dependencies.json, and confirmed the drift is whitespace only. The compiled token is unaffected since forge-std is test-only. Fix is to re-vendor those seven files byte for byte or regenerate the hash file.
• Info, allowance replacement race. Standard ERC-20 approve-overwrite behaviour, already documented in the README. A scratch test confirmed a front-running spender nets the old plus the new allowance. Recorded for the judge with the concrete trace, labelled as accepted design.

Coverage. All three listed entry points have rows, plus five invariant rows covering the constructor mint, supply conservation, exact launch flows, and the vendored OpenZeppelin sources, which I read line by line and found genuine. Nothing in my area was left unreached.

I added two test files on top of the existing suite. forge build succeeds and forge test passes with the verifier's fuzz seed: 49 tests in 5 suites, none failing or skipped.

What the token is: src/SqueekChain.sol is a plain OpenZeppelin ERC-20 called SqueekChain (SQK). Its constructor mints 1,000,000,000 × 10¹⁸ to whoever deploys it. There is no fee, owner, mint, burn or pause, so nothing in it lets anyone change the supply or move or freeze a balance.

test/SqueekChainFailurePathInvariant.t.sol

• One-call launch: a helper contract deploys the token and splits the supply (10% swarm, 60% pool, the rest to the requester) in a single call, the way the factory would. A test checks that each share arrives exactly.

• Random call sequences: a handler acts as six launch roles: distributor, pool manager, requester, claimant, trader and the deployer. It mixes normal transfers, approvals (including unlimited ones) and transfer-from calls with five kinds of call that must fail:

  • sending more than the balance
  • sending to the zero address
  • spending more than the allowance
  • spending more than the balance while within the allowance
  • a stranger spending with no approval

  Each failing call must revert with OpenZeppelin's exact error and leave balances, allowances and supply unchanged.

• Invariants: the supply stays fixed and the six roles always hold all of it; balances and allowances match an independent model; the stranger never gets tokens or an allowance; no rejected call changed anything. A final check confirms the failing calls actually ran, so the suite can't pass without testing anything. Run counts are set in the file (256 runs, depth 64).

test/SqueekChainEdgeCases.t.sol

• Unit tests for edge cases:
  • the zero address as sender or approver
  • an owner using transfer-from on their own tokens without an allowance
  • the exact balance limit (the full amount passes, one more fails)
  • an allowance of one below the maximum still being used up
  • spent allowance not being reusable
  • transfer, approve and transferFrom each returning exactly true
  • tokens sent to the token contract itself staying there
• Fuzz tests: approving any value, spending more than the balance but within the allowance, chained transfers adding up, and the launch split at any pool share up to 90%.

Defects: none found, so I didn't write .imd-findings.json. One thing that's expected, not a bug: tokens sent to the token contract's own address can never be recovered, because the contract has no rescue function. A test records this.

The new files are in test/ and not committed. I didn't change anything outside test/.

The findings file is in place and excluded from git by the harness, as intended. Nothing else is needed; the review is complete.

Outcome. The economics of SqueekChain hold. The token is a verbatim OpenZeppelin v5.0.2 ERC-20 with a single constructor mint of 10^27 units to msg.sender, no owner, no hooks, no fee, and no path that changes supply after construction. I report one low-severity defect, in the repository's provenance check rather than in the token.

What I verified in the assigned area.

• Economic Security: no external dependency, oracle, callback or sentinel branch exists. Transfers to the zero address revert, ETH sent to the token reverts, and the supply fits comfortably under 2^128 for Uniswap v4 liquidity math. The vendored production files are byte-identical to upstream OpenZeppelin v5.0.2, confirmed by fetching the tagged sources and diffing.
• Invariants: total supply is constant and equals the sum of balances. Only the constructor reaches _mint, the ABI exposes no mint, burn, initialize or owner function, and selector probes for those revert. The project's invariant suite and my own 512-run fuzz both hold.
• Flow Gap: the launch legs factory to distributor, factory to pool manager, factory to requester, distributor to claimant, and trader buy and sell all move exactly the requested amount with no partial state on failure. The factory cannot pull tokens back from a holder without an allowance. Infinite allowance is preserved and finite allowance is exhausted exactly.

The one finding. The README lists sha256sum -c dependencies.sha256 as a verification step, but on a clean checkout it exits 1 with seven forge-std files reported FAILED. The recorded hashes match upstream forge-std v1.9.7 exactly. The vendored copies were reformatted after hashing, with whitespace-only differences. Test tooling only, so no production impact, but the project's own integrity check cannot distinguish this drift from real tampering. The fix is to restore those seven files to their upstream bytes.

Coverage record. All three listed entry points are marked holds, with four extra rows for the supply, conservation, launch-economics and provenance invariants. The findings file validates as JSON with one finding and seven coverage rows, and my scratch test directory has been removed.

The review is complete. .imd-findings.json is written and valid, and the tree shows no other changes.

Result: the token's permission model holds. SqueekChain is a bare OpenZeppelin v5.0.2 ERC20 with a constructor that mints the full supply to msg.sender and nothing else. There is no owner, role, initializer, proxy, hook, fee branch, mint, burn, pause or blacklist surface. The compiled ABI exposes only approve, transfer and transferFrom as state-changing functions, with no receive or fallback. I verified all five vendored OpenZeppelin files byte for byte against upstream v5.0.2, so the inherited guards are exactly the audited ones.

What I checked against the three guides

• Access Control: no role to escalate, no second writer with a weaker guard on balances or allowances, no initialization to front-run, no delegatecall. The constructor hands the supply to the factory, which is the intended launch trust assumption.
• Asymmetry: transfer and transferFrom funnel into the same internal path, with transferFrom adding only the allowance spend. Zero-address checks are symmetric on both sides. The only asymmetric event emission is OpenZeppelin v5 design and is documented in the README.
• Trust Gap: with no privileged actor after deployment, the access-by-economics and access-by-asymmetry seams have no actor to exploit them.

One low finding, outside my area. The README directs verifiers to run sha256sum -c dependencies.sha256, and that check fails on seven forge-std files. I compared each against upstream forge-std v1.9.7 and every difference is whitespace only, so the test harness code is unchanged. The defect is a stale hash list that makes the repo's own supply-chain claim fail as documented. The fix is to regenerate the hash file from the committed lib tree.

Checks run: forge build, the full test suite of 34 unit, fuzz and invariant tests, forge fmt --check, the sha256 check, and upstream comparisons for every vendored file. Build, tests and fmt all pass. Slither and aderyn leads were reviewed. The aderyn large-literal line is the supply constant, which evaluates to exactly 10^27.

Coverage: all three entry points are marked holds, plus five invariant rows covering the constructor mint, the absent privilege surface, the paired-function symmetry, the vendored production dependency, and the documented repository checks, the last of which points at the finding.

Review complete. The findings file is written and validated, the working tree is otherwise untouched, and the scratch test was removed.

Outcome: the token is clean. SqueekChain is 17 lines inheriting OpenZeppelin v5.0.2 ERC20 unchanged, with a no-argument constructor that mints exactly 1e27 units to the factory. All three entry points hold, the manifest matches the constructor and supply, bytecode sizes are far below the limits, and the project's 49 tests plus forge fmt --check pass.

Findings kept in .imd-findings.json:

• Low, merged from three specialists: the documented sha256sum -c dependencies.sha256 check fails on seven forge-std files. I reproduced the failure and fetched each file from the v1.9.7 tag. The recorded hashes equal upstream, and the vendored copies match upstream byte for byte once whitespace is stripped, so the drift is formatting only. forge-std is test-only, so no production behaviour is affected. The five vendored OpenZeppelin files are byte-identical to upstream.
• Info, from audit_flow: the standard ERC-20 approve race. Reproduced with a scratch test where a front-running spender ends up with old plus new allowance. The README already documents it, and it is inherent to the requested ordinary ERC-20 design, so no change is required.

Dropped or absent: nothing was dropped, since every specialist finding reproduced. The aderyn large-numeric-literal lead is the supply constant written with underscores and exponent, which is correct and not a defect. My own pass over the code against the Pashov, x-ray, Trail of Bits and ethskills checklists found nothing the specialists missed.

Coverage record: all three ABI entry points answered as holds, plus rows for constructor and launch deployability and for the vendored dependencies.