The Offsets token is implemented, tested, documented and committed on main as commit 389b1e3.

What was built

• src/OffsetsToken.sol is a self-contained EIP-20 token named Offsets, symbol OFFSETS, 18 decimals. The constructor takes no arguments and mints the full supply of 1,000,000,000 tokens to the deployer, which at launch is the factory. There is no owner, mint, burn, pause, fee, blocklist, fallback, proxy or library call, so the supply is a constant and no privileged hand can move or freeze a holder.
• foundry.toml pins solc 0.8.26 with bytecode_hash set to none, cbor metadata off, optimizer on, ffi off and no filesystem permissions.
• forge-std v1.9.7 is vendored under lib/ as ordinary files with its nested git metadata stripped, so the offline verifier can resolve it. No submodule entries exist.
• script/DeployOffsetsToken.s.sol is a reference deploy script whose pure deploy function the tests call directly.
• README.md documents assumptions, the manifest values a reviewer should expect, build settings, manual deployment, operational responsibilities and trust notes.

Checks run locally

Check	Result
forge build (clean)	success
forge test	33 passed, 0 failed
forge fmt --check	clean

Tests cover metadata and supply, exact transfers and transferFrom, allowance semantics including the unlimited-allowance convention, typed revert paths for insufficient balance, insufficient allowance and zero addresses, a mirror of the launch payout flows arriving whole, a sweep of 22 admin and mint selectors from the deployer and a stranger all reverting with balances untouched, refusal of plain ether, the same opcode scan for DELEGATECALL, CALLCODE and SELFDESTRUCT that the protected floor runs, CREATE2 deployment on an empty chain, and fuzzed supply conservation. The tests read no environment variables and do not depend on the caller.

Open items for the launch, not this task

• Explorer verification after deployment belongs to the deployer, using the pinned build settings.
• Slither and Mythril were not available here and did not run.
• An independent adversarial review is still expected before release, as the launch policy requires.

I found no defects in src/OffsetsToken.sol, so .imd-findings.json holds an empty findings list. It also has a coverage row for each of the three entry points, all holds, plus rows for the invariants and the constructor I checked. I changed no project files.

Covered, using the Execution Trace, Periphery and First Principles guides:

• transfer / internal _transfer: zero addresses are rejected, and the balance is checked before the unchecked subtraction. The unchecked addition can't overflow because the supply is a fixed constant. Sending to yourself leaves your balance unchanged. There is no fee, burn or exemption, so every launch transfer arrives whole: factory to distributor, distributor to claimant, and into and out of the Uniswap v4 PoolManager.
• transferFrom: the allowance is spent first; an allowance of the maximum value counts as unlimited. If the transfer then reverts (zero address or low balance), the allowance change is undone too. The contract makes no outside calls, so there is no reentrancy opening.
• approve: zero addresses are rejected and the allowance is set exactly. The risk when changing a non-zero allowance is standard ERC-20 behaviour and the README already documents it.
• Supply and roles: the only mint is the constructor's 1,000,000,000 × 10^18 to the deployer (the factory), and totalSupply() is a fixed constant. There is no owner, admin, pause, blacklist, mint or burn, and the constructor takes no arguments and calls nothing else.
• Forbidden opcodes: I ran the protected test's scan on the built runtime code (1,796 bytes). It contains no DELEGATECALL, CALLCODE or SELFDESTRUCT.

The project's own 33 tests pass under forge build and forge test. I could not run the protected test here, because the files it imports (v4-core and LaunchLiquidity, for example) are not in this repository; the verifier supplies them. The tools' one lead, aderyn's "large numeric literal" at line 18, is just the supply constant 1_000_000_000 and not a defect. No launch.json exists yet, so there was no manifest to check.

Wrote launch.json for the Offsets launch. The build passes and all 33 tests pass, and git shows the manifest as the only change.

The manifest describes the accepted tree exactly:

• Token: contract OffsetsToken, name Offsets, symbol OFFSETS, 18 decimals, empty constructorArgs since the constructor takes no parameters, and totalSupply of 10^27 minor units, which is what the constructor mints to msg.sender.
• Contracts: empty list, since the accepted tree has no application contracts.
• Pool and economics: copied verbatim from the launch reference, with IMD as the paired currency, fee 12500, tick spacing 60, and the one-to-one provenance price.
• Notes: a 1062-character description of the token's behavior and the launch flows.

I checked the manifest with a scratch script against the compiled ABI, confirming the constructor has zero inputs, the key set matches the schema, and pool and economics match the job's values byte for byte.

The review is complete and the findings file is written. The working tree holds only .imd-findings.json beyond the original files, since the scratch tests were removed after running.

Result: no math, boundary or numerical-gap defect in the token. One informational observation is recorded.

What I checked, from the three assigned guides:

• Supply constant. The product of the whole-token count and ten to the eighteenth evaluates at compile time in uint256 to exactly 1e27, matching the manifest value. The aderyn large-literal lead is cosmetic.
• Unchecked blocks. The balance subtraction follows a strict guard. The recipient increment cannot overflow because the sum of balances is the constant supply. I confirmed this by moving the whole supply to one account and sending one more wei, which reverts.
• Allowance sentinel. The max value is infinite and not decremented. Max minus one is finite and is decremented. Infinite allowance still requires balance.
• Edges. Self-transfer of the whole balance, self transferFrom, max-uint amount, exact-allowance boundary, and from equal to the zero address all behave as intended.
• Boundary enumeration. The token makes no external calls, has no payable, receive, fallback or bytes decoding, so there are no boundaries of that kind to exercise.
• Conservation. Fuzz random walks through transfer and transferFrom conserve the sum of balances exactly.

Informational finding. A zero-amount transferFrom from any owner passes the allowance check and emits an Approval event naming that owner and the caller, plus a zero-value Transfer. No state changes and it matches OpenZeppelin 4.x behaviour, so it is not a security issue. Indexers that treat Approval as proof the owner acted could be misled.

Coverage. All three listed entry points have rows. The approve and transfer rows hold. The transferFrom row points to the informational finding. Five additional rows record the invariants and leads checked. No proof file was attached since nothing reaches high or critical severity.

The review is complete. The report is written to .imd-findings.json with no findings and a full coverage record.

Result: no defects found in the Offsets token against the Economic Security, Invariant and Flow Gap guides. All three listed entry points are marked holds, plus eight extra rows for the constructor, the invariants and the launch flows I checked.

What I verified

• Conservation. Only one private function writes balances, after a sufficiency check. A scratch handler-based invariant test ran transfers, approvals and transferFroms among six actors for 256 runs at depth 64 and the sum of balances stayed equal to the constant total supply every time. Self-transfer, zero-amount, from-equals-to and owner-equals-spender paths all conserve.
• Supply cannot grow. The compiled ABI exposes exactly the three listed state-changing functions and a no-argument constructor. There is no receive, fallback, mint, owner or upgrade path, and the runtime has no DELEGATECALL, CALLCODE or SELFDESTRUCT.
• Launch flows arrive whole. The token has no fee, burn or exemption logic, so the swarm share, the claim, the Uniswap v4 sync/transfer/settle seed and swaps each way move exactly the stated amount. The transfer call returns a single 32-byte true, which v4's low-level currency transfer accepts.
• No privileged hand. A factory call to move one wei from a holder without allowance reverts and leaves balances unchanged.
• Economic dependencies. The contract makes no external calls and has no oracle, fee formula or shared cap. The zero address is rejected as sender, recipient, owner and spender.
• Static-analysis lead. The aderyn large-numeric-literal line is the intended supply constant, confirmed equal to 1e27 by tests. It is style only.

Not reported as defects. The standard EIP-20 approve overwrite race and the absence of permit or increase/decrease-allowance helpers are documented design choices, not failures of any guarantee. No launch.json exists yet, which is expected at this stage.

The scratch test directory was removed, so the working tree contains only the findings file beyond the original commit.

The review is complete. .imd-findings.json holds an empty findings list and a coverage record of ten rows, and the working tree is unchanged apart from that ignored report file.

Result: no defects found in the Access Control, Trust Gap and Asymmetry areas for src/OffsetsToken.sol.

What I checked

• Access control. The contract has no roles, modifiers, initializer, proxy, fallback or receive. The ABI exposes only the nine EIP-20 functions and two constant getters. The constructor's single write is the whole supply to the deployer, which is the factory under the CREATE2 launch path. The deployer cannot pull from a holder without an allowance, and transferFrom with a zero from cannot mint.
• Asymmetry. transfer and transferFrom share one internal mover. The allowance spend precedes the balance move, so a revert leaves both untouched. Self-transfer inside the unchecked block writes sender then recipient sequentially and preserves the balance. The recipient increment cannot overflow because balances are only ever moved, never created, so their sum stays at the constant supply.
• Trust gap. With no privileged actor, no setter, no fee and no caller-class branch, there is no seam between authorization and value flow to exploit. The launch legs move exactly what they say.
• Static analysis lead. The aderyn large-literal note on line 18 is style only.

Evidence. The existing 33 tests pass. I ran twelve additional scratch probes covering self-transfer via allowance, self-allowance requirement, deployer pull attempt, zero-address mint attempt, infinite and max-minus-one allowances, repeated whole-supply round trips, unknown selectors and ether, and event ordering. All behaved as intended. One probe of mine failed only because it passed the zero address as the recipient, and the trace showed the token's zero-address guard rejecting it correctly. The scratch directory has been removed.

Not reached. Nothing in the assigned area was left unverified. The protected launch-floor test could not be executed here since it needs the factory's environment and the v4-core dependency, so the pool seed and swap legs are verified by reasoning about the token's exact-amount transfers rather than by running that harness.

The earlier warning came from the now-deleted mutant files. The clean build has no warnings and the full suite passes.

Outcome: two new test files under test/ extend the existing suite from 33 to 68 tests, all passing on forge build and forge test. No defect was found in the token, so there is nothing to report in a findings file.

What was added

• test/OffsetsToken.invariant.t.sol holds a handler-driven invariant suite. The handler drives six actors, one of them a contract, plus two passive sinks including the token itself. It keeps a ghost ledger of every balance and allowance, asserts exact postconditions after every call, and covers the failure paths too: transfers above balance, to the zero address, above allowance, above balance within allowance, zero-spender approvals, unknown selectors and attached ether, each required to revert with the exact typed error and change nothing. Seven invariants check conservation of the fixed supply, ledger agreement for balances and allowances, the zero-address rule, no ether held, and fixed metadata. A second contract targets the token directly with unbounded calldata and allowed reverts.
• test/OffsetsToken.edges.t.sol pins the edges the existing unit tests left open. It covers the zero address as sender, owner, spender and recipient including zero amounts, an allowance one below the infinite sentinel, the owner spending from itself without self-approval, allowances that outlive balances, event emission on infinite versus finite allowances, tokens stuck in the contract, return data shape, ether attached to otherwise valid calls, truncated calldata, and twelve property tests over additivity, round trips, self transfers, empty accounts and exact allowance spending at 1000 runs.

Verification

• The harness was grounded against two mutated copies of the token in scratch space. A short-credit mutant failed immediately at seeding, and a mutant that never spends allowance failed with a two-call shrunk sequence. Both scratch mutants were removed afterwards.
• The invariant suite reports its call mix after each run, so a reviewer can see every refusal path was exercised, not only the happy one.

Left as is

• The implementation is correct as far as these tests can reach, so no .imd-findings.json was written. Nothing outside test/ was touched, and nothing was installed or committed.

I'm reporting no findings for OffsetsToken. .imd-findings.json has an empty findings list and a coverage row for each of the three entry points, all marked holds.

The one specialist finding is dropped. The math specialist reported (as info) that a zero-amount transferFrom from someone with no allowance emits Approval(owner, caller, 0) and Transfer(owner, to, 0). I traced it: the check 0 < 0 is false, so the call goes through, and the event is real. But no balance or allowance changes, and OpenZeppelin 4.x does the same, so it's not a defect. The other four reports had no findings.

Entry points:

• approve rejects the zero address for either party and sets the allowance to exactly the amount given. The contract has no owner or other privileged function.
• transfer rejects the zero address, checks the sender's balance before the unchecked subtraction, and credits the full amount to the recipient. Sending to yourself leaves your balance unchanged. There's no fee or burn, so the factory's payouts (distributor share, pool seed, remainder) and trades arrive exact.
• transferFrom treats a maximum allowance as unlimited, otherwise reverts when the allowance is too small, and lowers the allowance before moving tokens.

Supply and deployment:

• The constructor mints 1e27 (1,000,000,000 × 10^18) once to msg.sender, and totalSupply() returns a fixed constant.
• There's no mint, burn, pause, blocklist, delegatecall or selfdestruct.
• launch.json agrees with the code: supply 1e27, 18 decimals, no constructor arguments.
• The factory can deploy it as is: no constructor arguments, no external calls, runtime code about 1.8 KB (limit 24,576), and it needs no particular address bits.

Static analysis: slither reported nothing. aderyn's one line, a "large numeric literal" at line 18, is just the supply constant 1_000_000_000, so it isn't a defect.

Checks run: the project's existing suite passes, 68 of 68 tests across 5 suites, including the invariant run. I wrote no proof tests because there was nothing to reproduce.