C-1 / C-3 / C-4 covered the independence of the side that reads the record. C-2 is about the validator — the side that verifies signed actions, batches them, and writes them to the chain. Three questions: #16 can anyone become a validator (approval), #17 can a single validator censor signed actions, and #18 can a different validator reconstruct the same queue from public inputs. Honestly: two of the three are clearly verified, and one (#18) is by design — examined and found to be an intentional design, not a defect.

1. Claim (what is verified)

#16 that validator participation (client creation, instance registration, batch submission) is permissionless; #17 that a single validator cannot censor signed actions; #18 that a different validator can reconstruct the same queue from public inputs.

2. Method

3. Verdict

• #16 permissionless createClient (public), registerInstance (no gate), processActions (caller unrestricted). validatorId is an attribution param only. My instanceId 232 (on the production registry, owner = my node’s validator 0x4fe9…380D) is a real self-registration, and a register simulation from an unrelated random address returns a fresh id (475) — still permissionless, confirmed live.
• #17 uncensorable Signed actions can be submitted by anyone, including the user (security is the EIP-712 signature). The client-side peer mirror (validated_by_peer / “peer mirror submitted”) adds redundancy, so a single validator cannot censor.
• #18 partial The settled order is canonical on-chain = reconstructable (C-3). The pending queue enters via each node’s API → TxQueue and is mirrored among peers, but there is no public gossip for exact external reconstruction = open door.

4. Receipt (public proof)

The submission path and registration permissionlessness (deployed-contract source):

The msg.sender checks inside processActions are internal self-call guards only; they do not restrict external callers:

CawActions.sol  processActions(...) external payable   # no call gate
  require(c.actionsSeen == actionCount, "Sigs don't cover all actions")  # secured by signatures
  require(msg.sender == address(this), "Only self")    # internal self-call only (not an external restriction)

#16 live demonstration: an eth_call to the production CawClientManager (L1 Sepolia, 0xA5C515…1424C7a), no state change. Simulating registration with an unrelated random address as from; a fresh id returned proves anyone can register:

# eth_call to the production CawClientManager (L1 Sepolia)
nextInstanceId()                       # → 475 (a live registry with 474 instances)
instanceOwner(232)                     # → 0x4fe9…380D (my node1 validator = instanceId 232 is my own registration)
registerInstance(1,…) from=0x…DeAdBeef # → 475 (fresh id) = client 1 exists, no caller gate = still permissionless

#17’s peer mirror (another peer submits if one validator withholds):

ValidatorService/index.ts   status: 'validated_by_peer'                 # validated by a peer
  "action already on chain (peer mirror submitted) — marking done"        # another peer submitted, adding redundancy

#18’s boundary (settled order vs pending queue):

5. Notes & limits

#18 is this item’s biggest open door. The pending line can’t be reconstructed exactly from public inputs — but for two intentional design reasons: (1) /txqueue/status requires auth and returns only your own senderIds (a privacy fix from the audit), and (2) there is no global pending mempool — actions live in each node’s TxQueue and the FE fans them out to several peers for distributed submission. So this is not a centralization gap but intentional non-reconstructability. The settled order is reconstructable via C-3, and censorship resistance (#17) holds independently.

Note that validatorId carries fee attribution, so submission involves economic-incentive design; but the fact that nothing structurally blocks submission (self-submission is allowed) is the basis for #17.

The scope is the on-chain action stream. DMs and images off-chain, the Base L2 sequencer, and both nodes sharing one operator are the same open doors as C-1 / C-3.