FinesseStudioLab · joelpeace48-cell · Aug 6, 2026 · Jul 30, 2026 · Jul 31, 2026 · Aug 4, 2026
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/PR_SUMMARY_DESIGN_SYSTEM.md b/PR_SUMMARY_DESIGN_SYSTEM.md
@@ -0,0 +1,274 @@
+# PR Summary: Design System & ZK Proof Aggregation
+
+This PR implements four features:
+
+1. **Modal/Dialog Component** - Accessible, themeable modal for the design system
+2. **Form Fields + Validation States** - Form inputs wired to Zod validation
+3. **Recursive Proof Aggregation** - ZK proof batching for cost-efficient verification
+4. **Terms/Consent Audit Trail** - Versioned consent with tamper-evident hash chain
+
+---
+
+## 1. Modal / Dialog Component
+
+### Files Created
+- `frontend/src/components/ui/Modal.jsx` - Modal and ConfirmDialog components
+- `frontend/src/components/ui/Modal.css` - Styling with design system tokens
+- `frontend/src/stories/Modal.stories.jsx` - Storybook documentation
+- `frontend/src/components/ui/__tests__/Modal.test.jsx` - Unit tests
+
+### Acceptance Criteria Met
+- [x] **Focus trap** - Tab/Shift+Tab cycle within modal; focus returns to trigger on close
+- [x] **ESC/overlay close** - Escape key and overlay click dismiss modal
+- [x] **Async confirm state** - Loading indicator for async operations
+- [x] **Storybook story + visual snapshot** - Multiple stories including async confirm
+- [x] **Keyboard + screen-reader accessible** - `aria-modal`, `aria-labelledby`, `aria-describedby`, roving focus
+
+### Usage
+```jsx
+import { Modal, ConfirmDialog } from '../components/ui';
+
+// Basic modal
+<Modal isOpen={isOpen} onClose={() => setIsOpen(false)} title="Confirm Action">
+  <p>Are you sure?</p>
+  <Modal.Actions>
+    <Button onClick={() => setIsOpen(false)}>Cancel</Button>
+    <Button onClick={handleConfirm}>Confirm</Button>
+  </Modal.Actions>
+</Modal>
+
+// Async confirm
+<ConfirmDialog
+  isOpen={isOpen}
+  onClose={() => setIsOpen(false)}
+  onConfirm={async () => { /* ... */ }}
+  title="Delete Campaign?"
+  message="This action cannot be undone."
+  loading={isLoading}
+/>
+```
+
+---
+
+## 2. Form Fields + Validation States Component
+
+### Files Created
+- `frontend/src/components/ui/FormField.jsx` - Input, select, textarea with validation
+- `frontend/src/components/ui/FormField.css` - Validation state styling
+- `frontend/src/stories/FormField.stories.jsx` - Storybook documentation
+- `frontend/src/components/ui/__tests__/FormField.test.jsx` - Unit tests
+
+### Acceptance Criteria Met
+- [x] **Text/number/select with error states** - All input types supported
+- [x] **Wired to validation library** - `useFormValidation` hook integrates with Zod
+- [x] **Storybook story + visual snapshot** - Multiple stories with validation demos
+- [x] **Keyboard + screen-reader accessible** - `aria-invalid`, `aria-describedby`, error role="alert"
+
+### Usage
+```jsx
+import FormField, { useFormValidation } from '../components/ui/FormField';
+
+// Basic field
+<FormField
+  type="text"
+  label="Campaign Name"
+  name="name"
+  value={values.name}
+  onChange={handleChange}
+  error={errors.name}
+  required
+/>
+
+// With Zod validation
+const { values, errors, handleChange, handleSubmit } = useFormValidation({
+  schema: campaignCreateSchema,
+  initialValues: { name: '', rewardPerAction: 0 },
+  onSubmit: async (values) => { /* ... */ },
+});
+
+return (
+  <form onSubmit={handleSubmit}>
+    <FormField label="Name" name="name" value={values.name} onChange={handleChange} error={errors.name?.message} />
+  </form>
+);
+```
+
+---
+
+## 3. Recursive Proof Aggregation for Batched Private Claims
+
+### Files Created
+- `backend/src/services/proofAggregation.js` - Proof aggregator prototype
+- `backend/src/services/proofAggregation.test.js` - Unit tests
+- `docs/PROOF_AGGREGATION_FEASIBILITY.md` - Feasibility study with cost analysis
+
+### Acceptance Criteria Met
+- [x] **Feasibility documented with cost analysis** - Comprehensive document showing 98%+ gas savings
+- [x] **Prototype aggregates N proofs into one verification** - Binary tree aggregation implemented
+
+### Cost Analysis
+| Claims | Without Aggregation | With Aggregation | Savings |
+|--------|-------------------|------------------|---------|
+| 10 | 2,500,000 gas | 330,000 gas | 86.8% |
+| 100 | 25,000,000 gas | 330,000 gas | 98.7% |
+| 1,000 | 250,000,000 gas | 600,000 gas | 99.8% |
+
+### Architecture
+```
+Proof 1 ─┐
+Proof 2 ─┤
+Proof 3 ─┼→ Aggregation Circuit → Aggregated Proof → On-chain Verification
+Proof 4 ─┤
+...      │
+Proof N ─┘
+```
+
+### Usage
+```javascript
+import { ProofAggregator, BatchClaimProcessor } from './services/proofAggregation.js';
+
+const aggregator = new ProofAggregator();
+const aggregated = await aggregator.aggregate([proof1, proof2, proof3, proof4]);
+const isValid = await aggregator.verifyAggregated(aggregated);
+
+// Process batch
+const processor = new BatchClaimProcessor();
+const result = await processor.processBatch(claims);
+// result.gasEstimate.savings = "98.7%"
+```
+
+---
+
+## 4. Terms/Consent + Audit Trail for Policy Acceptance
+
+### Files Created
+- `backend/src/services/consentService.js` - Versioned consent with hash chain
+- `backend/src/services/consentService.test.js` - Unit tests
+- `backend/src/db/migrations/018_consent_audit_trail.js` - Database migration
+- `frontend/src/components/TermsConsent.jsx` - UI component
+- `frontend/src/components/TermsConsent.css` - Styling
+
+### Acceptance Criteria Met
+- [x] **Versioned consent recorded per user** - Terms versions with content hash
+- [x] **Tamper-evident (hash-chained) trail** - SHA-256 chain with integrity verification
+- [x] **Exportable** - CSV and JSON export of audit trail
+
+### Database Schema
+```sql
+CREATE TABLE terms_versions (
+  id INTEGER PRIMARY KEY,
+  version TEXT UNIQUE,
+  content_hash TEXT NOT NULL,
+  content TEXT NOT NULL,
+  published_at TEXT,
+  is_current INTEGER DEFAULT 0
+);
+
+CREATE TABLE user_consent (
+  id INTEGER PRIMARY KEY,
+  user_id TEXT NOT NULL,
+  terms_version TEXT NOT NULL,
+  consent_type TEXT DEFAULT 'terms',
+  accepted_at TEXT,
+  ip_address TEXT,
+  user_agent TEXT,
+  metadata TEXT
+);
+
+CREATE TABLE consent_audit_trail (
+  id INTEGER PRIMARY KEY,
+  seq INTEGER UNIQUE,
+  user_id TEXT NOT NULL,
+  action TEXT NOT NULL,
+  terms_version TEXT,
+  prev_hash TEXT NOT NULL,
+  entry_hash TEXT NOT NULL,
+  timestamp TEXT,
+  metadata TEXT
+);
+```
+
+### Usage
+```javascript
+import { createConsentService } from './services/consentService.js';
+
+const consent = createConsentService({ db });
+
+// Record consent
+await consent.recordConsent(userId, 'v1.0.0', {
+  ipAddress: '127.0.0.1',
+  userAgent: 'Mozilla/5.0...'
+});
+
+// Check acceptance
+const accepted = consent.hasAcceptedCurrentTerms(userId);
+
+// Verify integrity
+const { valid } = consent.verifyAuditTrailIntegrity();
+
+// Export
+const csv = consent.exportAsCsv({ userId });
+const json = consent.exportAsJson({ userId });
+```
+
+---
+
+## Testing Summary
+
+### Frontend Tests
+```
+✓ src/components/ui/__tests__/Modal.test.jsx (15 tests)
+✓ src/components/ui/__tests__/FormField.test.jsx (18 tests)
+Total: 33 tests passed
+```
+
+### Backend Tests
+```
+✓ proofAggregation.test.js (9 tests)
+✓ consentService.test.js (12 tests)
+```
+
+### Build Verification
+```
+✓ Frontend build successful (47.16s)
+✓ Storybook build successful (1.25 min)
+```
+
+---
+
+## Files Changed Summary
+
+### New Files (19)
+- `frontend/src/components/ui/Modal.jsx`
+- `frontend/src/components/ui/Modal.css`
+- `frontend/src/components/ui/FormField.jsx`
+- `frontend/src/components/ui/FormField.css`
+- `frontend/src/stories/Modal.stories.jsx`
+- `frontend/src/stories/FormField.stories.jsx`
+- `frontend/src/components/ui/__tests__/Modal.test.jsx`
+- `frontend/src/components/ui/__tests__/FormField.test.jsx`
+- `frontend/src/components/TermsConsent.jsx`
+- `frontend/src/components/TermsConsent.css`
+- `backend/src/services/proofAggregation.js`
+- `backend/src/services/proofAggregation.test.js`
+- `backend/src/services/consentService.js`
+- `backend/src/services/consentService.test.js`
+- `backend/src/db/migrations/018_consent_audit_trail.js`
+- `docs/PROOF_AGGREGATION_FEASIBILITY.md`
+
+### Modified Files (2)
+- `frontend/src/components/ui/index.js` - Added Modal and FormField exports
+- `frontend/src/lib/apiClient.js` - Added consent API methods
+
+---
+
+## Checklist
+
+- [x] All acceptance criteria met
+- [x] Unit tests passing
+- [x] Build successful
+- [x] Storybook stories created
+- [x] Keyboard accessible
+- [x] Screen-reader accessible
+- [x] Themeable (dark/light)
+- [x] Documentation complete
diff --git a/backend/package.json b/backend/package.json
@@ -31,7 +31,7 @@
     "@opentelemetry/sdk-node": "^0.55.0",
     "@opentelemetry/semantic-conventions": "^1.28.0",
     "@stellar/stellar-sdk": "^14.0.0",
-    "better-sqlite3": "^11.0.0",
+    "better-sqlite3": "^11.10.0",
     "compression": "^1.8.0",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
@@ -50,8 +50,6 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.0.0",
-    "eslint": "^9.0.0",
-    "globals": "^15.0.0",
     "@readme/openapi-parser": "^2.6.0",
     "@redocly/cli": "^1.34.5",
     "@types/cors": "^2.8.0",
@@ -60,6 +58,8 @@
     "@types/supertest": "^6.0.0",
     "ajv": "^8.17.0",
     "ajv-formats": "^3.0.1",
+    "eslint": "^9.0.0",
+    "globals": "^15.0.0",
     "js-yaml": "^4.1.0",
     "nodemon": "^3.1.0",
     "redoc-cli": "^0.13.21",