[T6.5] At claimDeadline: sweep unclaimed to dead address

[realproject7]

Epic: #1229 · Spec: §5.3, §8 Phase 6, R11 · Type: OPERATOR · Estimate: 0.1 day

Scope

After claimDeadline passes (~30 days after T6.2 settlement-day announcement), call sweepUnclaimed(deadAddress) on the MerkleClaim contract to burn remaining unclaimed PLOT.

Prerequisite

T2.7 sweep capability deployed via T6.2 Step 1. The contract now has:

• owner = deployer wallet
• claimDeadline set at deploy
• sweepUnclaimed(address to) callable only by owner, only after deadline

Steps

1. Verify block.timestamp > claimDeadline (via Basescan read on the deployed MerkleClaim)
2. From owner wallet, call:

   MerkleClaim.sweepUnclaimed(0x000000000000000000000000000000000000dEaD)
   

3. Confirm Swept event emitted with full remaining balance
4. Record tx hash + final unclaimed amount in this issue
5. Update X/FC announcement with final burn figures (closes campaign loop)

R11 mitigation

• Calendar reminder set for T6.2 announcement + 30 days
• Operator playbook (§9 incident playbook) referenced

Sub-Bronze branch

Skip this entire ticket if T6.1 was sub-Bronze (no MerkleClaim deployed, nothing to sweep). Mark closed with "skipped — sub-Bronze."

Acceptance

• claimDeadline confirmed passed via on-chain read
• sweepUnclaimed tx executed from owner wallet
• Swept event captured with final unclaimed amount
• Tx hash + amount recorded in this issue
• Final figures announced
• Campaign loop closed; v5 archive entry recorded
• If sub-Bronze: ticket closed with explicit skip rationale

Dependencies

T2.7 (#1267 — contract sweep capability), T6.2 (#1263 — contract deployed with deadline at Step 1; announcement at Step 3 marks claim-window open). Calendar trigger: T6.2 announcement timestamp + CLAIM_WINDOW_DAYS (default 30) elapsed.

[realproject7]

Superseded by the v6 Base Ecosystem Sprint redesign (spec: docs/PLOTLINK-diamond-hand-airdrop-6.md). v6 reuses MerkleClaim.sol sweepUnclaimed but under v6 settlement timing — sweep target is treasury (no burn). Re-scoped under the upcoming v6 EPIC.