[Unclebaffa]

Pull Request: Comprehensive Security, Validation, Staking & Theming Fixes

Linked Issues

• Closes Contact form lacks sanitization #943 (Contact form lacks sanitization)
• Closes API routes lack input validation #940 (API routes lack input validation)
• Closes Staking form lacks balance validation #941 (Staking form lacks balance validation)
• Closes Theme toggle uses color inversion #942 (Theme toggle uses color inversion)

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Executive Summary

This pull request delivers complete fixes and regression test suites for four distinct issues across security, parameter validation, contract transaction safety, and accessibility theming:

1. Input Sanitization & Abuse Mitigation (Contact form lacks sanitization #943): Neutralizes stored/reflected XSS vectors across contact, query, newsletter, commission, and profile edit forms using iterative fixed-point tag/protocol stripping, hidden honeypots for bot traps, and submission rate limits.
2. API Route Parameter Validation (API routes lack input validation #940): Protects dynamic API endpoints (api/artist/[id], api/marketplace/[id], api/portfolio/[id]) against path traversal (../, %2f, null bytes) and SQL injection using strict Zod schemas, HTTP 400 Bad Request error handling, rate limiting (HTTP 429), and parameterized database access patterns.
3. Staking Form Balance Validation (Staking form lacks balance validation #941): Eliminates failed blockchain transactions and lost gas fees by introducing real-time Stellar balance hooks and pre-transaction balance validation across StakeForm, UnstakeForm, DelegateStakeForm, and CompoundStakeForm with the exact required error format: "Insufficient balance. You have X tokens, trying to stake Y."
4. Native CSS Dark Mode (Theme toggle uses color inversion #942): Eliminates visual halation, inverted images/logos, and poor contrast by removing filter: invert() and establishing native CSS color-scheme: light dark, the light-dark() CSS function, and custom properties (--color-bg, --color-text) across ThemeToggle, Header, and Layout.

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Detailed Issue Breakdown & Solutions

1. Issue #943: Contact Form Lacks Sanitization

• Problem: Message bodies, queries, and user profiles were submitted raw without validation or sanitization, creating XSS risks from nested malicious tags and unquoted event handlers. Forms also lacked rate limiting and bot protection.
• Solution:
  • Upgraded src/lib/sanitize.ts with an iterative fixed-point loop (do ... while (current !== prev)) to completely remove recursive tags (e.g. <<<script>script>), script blocks, javascript: / vbscript: / data: pseudoprotocols, and event handler attributes (onerror=, onload=).
  • Added accessible, hidden honeypot fields (bot_field) with tabIndex={-1} and aria-hidden="true" to ContactForm.tsx, NewsletterForm.tsx, and QueryForm.tsx to drop spam submissions silently.
  • Implemented client-side rate limiting (60s cooldown per key) to stop submission flooding.
  • Integrated input sanitization into CommissionRequestModal.tsx and ProfileEditPage.tsx.
• Test Coverage: src/test/Form.test.tsx (25 tests covering recursive sanitization, honeypot traps, rate limiting, and email formatting).

2. Issue #940: API Routes Lack Input Validation

• Problem: Route parameter id in api/artist/[id].tsx and companion marketplace/portfolio routes lacked format validation, opening the system to path traversal and SQL injection payloads.
• Solution:
  • Created src/validators/artist-id.validator.ts with Zod schemas (artistIdSchema, marketplaceIdSchema, portfolioIdSchema) validating that IDs are strictly positive integers (/^[1-9]\d*$/) or standard RFC 4122 UUIDs.
  • Added explicit filters rejecting path traversal (.., /, \, %2f, null bytes) and SQL injection signatures (--, /*, quotes, semicolons, stacked queries).
  • Implemented both App Router (GET(req, { params })) and Pages Router / Express (handler(req, res)) patterns in:
    • api/artist/[id].tsx
    • api/marketplace/[id].tsx
    • api/portfolio/[id].tsx
  • Added in-memory rate limiting (30 requests/minute returning HTTP 429) and parameterized database query simulation.
• Test Coverage: src/test/artist-api.test.ts (16 tests verifying positive integers, UUIDs, negative IDs, path traversal, SQL injection, and rate limiting).

3. Issue #941: Staking Form Lacks Balance Validation

• Problem: Users could submit staking and unstaking transactions for amounts greater than their balance, causing failed contract executions, wasted network fees, and unhelpful error messages.
• Solution:
  • Implemented src/hooks/useStellarBalance.ts to manage real-time wallet balances, staked totals, and claimable rewards with getBalance.
  • Added validateStakeBalance and contract-level guard requireBalance enforcing the required message format:
    "Insufficient balance. You have ${availableBalance} tokens, trying to ${action} ${amount}."
  • Built pre-transaction validation, balance displays, and "Max" auto-fill buttons into:
    • StakeForm.tsx (prevents staking more than available balance)
    • UnstakeForm.tsx (prevents unstaking more than staked balance)
    • DelegateStakeForm.tsx (validates available balance and validator address)
    • CompoundStakeForm.tsx (validates claimable rewards balance)
• Test Coverage: src/test/staking.test.tsx (14 tests asserting boundary limits, error message strings, "Max" buttons, and submission guards).

4. Issue #942: Theme Toggle Uses Color Inversion

• Problem: Dark mode relied on filter: invert(), which inverted photographs, artwork, brand gradients, and icons, creating visual distortion, halation, and contrast degradation.
• Solution:
  • Configured :root with color-scheme: light dark in src/index.css.
  • Defined CSS custom properties using native light-dark():
    • --color-bg: light-dark(var(--color-bg-light), var(--color-bg-dark));
    • --color-text: light-dark(var(--color-text-light), var(--color-text-dark));
  • Explicitly protected images, videos, canvas, svgs, and gradients from inversion:

    :root[data-theme='dark'] img,
    :root[data-theme='dark'] video,
    :root[data-theme='dark'] canvas,
    :root[data-theme='dark'] svg,
    [data-theme='dark'] img,
    [data-theme='dark'] video,
    [data-theme='dark'] canvas,
    [data-theme='dark'] svg {
      filter: none !important;
    }

  • Updated src/lib/theme.ts to synchronize document.documentElement.style.colorScheme and safely guard window.matchMedia and localStorage.
  • Built unified, semantic components: ThemeToggle.tsx, Header.tsx, and Layout.tsx.
• Test Coverage: src/test/DarkMode.test.ts (6 tests asserting zero filter: invert(), clean theme toggling, image/gradient preservation, and WCAG AAA > 10:1 contrast ratios).

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Acceptance Criteria Matrix

Issue	Acceptance Criterion	Status	Verified By
#943	Email validation rejects invalid formats (foo, @bar, missing@domain)	Passed	Form.test.tsx
#943	Message body sanitized before submission	Passed	Form.test.tsx
#943	Strips dangerous HTML and scripts from input	Passed	Form.test.tsx
#943	Preserves legitimate text and punctuation	Passed	Form.test.tsx
#943	Hidden honeypot field catches bot submissions	Passed	Form.test.tsx
#943	Rate limiting prevents submission abuse	Passed	Form.test.tsx
#943	All contact/newsletter/query forms sanitized	Passed	Form.test.tsx
#940	api/artist/[id].tsx validates the id parameter format	Passed	artist-api.test.ts
#940	Invalid IDs return 400 Bad Request with clear error message	Passed	artist-api.test.ts
#940	SQL injection attempts are blocked	Passed	artist-api.test.ts
#940	Path traversal attempts are blocked	Passed	artist-api.test.ts
#940	Rate limiting on the artist API endpoint	Passed	artist-api.test.ts
#940	Test asserts validation blocks malicious inputs	Passed	artist-api.test.ts
#940	All artist/marketplace/portfolio API routes validate parameters	Passed	artist-api.test.ts
#940	No unvalidated route parameters remain in the API	Passed	artist-api.test.ts
#941	Stake form validates user has sufficient balance before transaction	Passed	staking.test.tsx
#941	Clear error message: "Insufficient balance. You have X tokens, trying to stake Y."	Passed	staking.test.tsx
#941	Unstake form has the same balance validation	Passed	staking.test.tsx
#941	Test covers balance validation for both stake and unstake	Passed	staking.test.tsx
#941	No stake/unstake transactions can exceed user balance	Passed	staking.test.tsx
#941	All staking forms check balance before submission	Passed	staking.test.tsx
#942	Dark mode uses light-dark() or CSS variables instead of filter: invert()	Passed	DarkMode.test.ts
#942	Images and gradients retain original colors in dark mode	Passed	DarkMode.test.ts
#942	Text is readable in dark mode with proper contrast (WCAG AAA)	Passed	DarkMode.test.ts
#942	No visual artifacts or halation in dark mode	Passed	DarkMode.test.ts
#942	Test asserts dark mode works without color inversion issues	Passed	DarkMode.test.ts
#942	All themes use consistent dark mode implementation	Passed	DarkMode.test.ts

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Automated Test Verification

All 61 automated tests across all four test suites pass completely:

$ npx vitest run src/test/artist-api.test.ts src/test/DarkMode.test.ts src/test/staking.test.tsx src/test/Form.test.tsx

 RUN  v4.1.12 C:/Users/hp/OneDrive/Desktop/GrantFox/stellarAid-web

 ✓ src/test/artist-api.test.ts (16 tests)
 ✓ src/test/DarkMode.test.ts (6 tests)
 ✓ src/test/staking.test.tsx (14 tests)
 ✓ src/test/Form.test.tsx (25 tests)

 Test Files  4 passed (4)
      Tests  61 passed (61)
   Duration  16.00s

• ESLint: Passed with 0 errors and 0 warnings.
• Prettier: Formatted and checked with 100% compliance.
• Pre-commit Hook (Husky / lint-staged): Passed all tasks.

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[ayshadogo]

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