Milestone Completion Report

Application: Stylus Manager - Caching, Activating and Tracking Stylus Contracts

Team: Augusto Collerone, Lautaro Sole, Ignacio Quesada

Milestone: Enhancements, QA, User Testing & Bug Fixing

Funding Amount Unlocked: 6,000 USD

Date Submitted: 21/08/2026

Summary of the Deliverables: End-to-end validation and hardening of the Stylus Manager ahead of mainnet deployment: full-system testing (backend, contracts, and Playwright-based UI validation on desktop and mobile), a security pass anchored on the external Cyfrin audit of CacheManagerAutomation with documented responses and fixes, a frontend enhancement and stabilization pass across four PRs (responsive dark design system, Cache/Activation workflow rebalance, wallet network consistency, keyboard accessibility), and testing-driven improvements and bug fixes triaged through Linear.

Deliverables & Proof of Work

Full-System Testing

Testing coverage across the three layers, protecting both the new Activation flow and the pre-existing caching functionality:

• Backend unit tests — Test run (GitHub Actions)
• Backend ↔ contracts integration tests — run repeatedly on local fresh Nitro devnode environments throughout the remediation and stabilization work (same suite as the stylus-cm-deploy Integration Tests workflow).
• Contract tests — 73/73 deterministic tests plus 28/28 CacheManager and 29/29 CacheManagerAutomation tests on a fresh local Nitro environment, as reported in remediation PR #22.
• Playwright UI validation at desktop and mobile widths across all major flows: horizontal-overflow checks, modal lifecycle behavior, keyboard navigation, and focus restoration.
• Automated review — CodeRabbit findings addressed across all frontend PRs; final reviews completed with no remaining actionable comments.

Security: Cyfrin Audit — Responses & Fixes

External security audit of the CacheManagerAutomation contract performed by Cyfrin. The audit surfaced no critical findings and no issues putting user funds at risk. All 31 findings were reviewed and answered individually on the auditor's review repository, with remediation delivered in PR #22: 22 fixed/remediated, 1 disputed with a clarifying change and regression coverage, and 8 acknowledged (including 2 gas optimizations deferred to dedicated follow-up work).

The remediation includes hardened two-step ownership transfers, escrow automation-withdrawal separation, funding-limit enforcement, per-batch authorization deduplication, owner-parameter bounds and invariants, gas optimizations (storage packing, calldata usage, custom errors), build hardening (pinned compiler EVM target), and expanded test coverage. Contracts version bumped to v2.0.0.

Validation completed: 73/73 deterministic tests, 28/28 CacheManager and 29/29 CacheManagerAutomation tests on a fresh local Nitro environment, external ABI verification (2/2), storage layout review, and end-to-end validation of the activation refund behavior against local Nitro.