# Comparison: DBIS Token Lists vs Uniswap Token Lists

**Date**: 2026-01-26  
**Status**: Updated with @uniswap/token-lists integration

---

## Overview

This document compares our DBIS Chain 138 Token List implementation with the official Uniswap Token Lists specification and package.

---

## Implementation Comparison

### Schema & Validation

| Feature | Uniswap Package | DBIS Implementation | Status |
|---------|----------------|---------------------|--------|
| JSON Schema | ✅ Exported from package | ✅ Fetched from URL (now uses package) | ✅ **Integrated** |
| TypeScript Types | ✅ `TokenList`, `TokenInfo`, `Version` | ⚠️ Manual validation | ✅ **Available** |
| Schema Validation | ✅ Via AJV | ✅ Via AJV with fallback | ✅ **Enhanced** |
| EIP-55 Checksum | ❌ Not included | ✅ Custom validation | ✅ **Enhanced** |
| Duplicate Detection | ❌ Not included | ✅ Address & symbol checks | ✅ **Enhanced** |
| Chain ID Validation | ❌ Not included | ✅ Strict validation (138) | ✅ **Enhanced** |
| On-Chain Verification | ❌ Not included | ✅ RPC verification | ✅ **Enhanced** |
| Logo Validation | ❌ Not included | ✅ URL accessibility check | ✅ **Enhanced** |

### Package Integration

| Feature | Before | After | Status |
|---------|--------|-------|--------|
| Schema Source | URL fetch | `@uniswap/token-lists` package | ✅ **Integrated** |
| Type Safety | Manual | TypeScript types available | ✅ **Available** |
| Dependency | None | `@uniswap/token-lists@^1.0.0-beta.34` | ✅ **Added** |
| Fallback | None | URL fetch fallback | ✅ **Maintained** |

---

## Feature Comparison

### ✅ What We Have That Uniswap Doesn't

1. **Enhanced Validation**
   - EIP-55 checksum validation
   - Duplicate address detection
   - Duplicate symbol detection (per chainId)
   - Strict chain ID validation
   - Logo URL validation

2. **On-Chain Verification**
   - RPC-based contract verification
   - ERC-20 token verification
   - Oracle contract verification
   - Dual RPC endpoint support with fallback

3. **CI/CD Integration**
   - GitHub Actions PR validation
   - Release workflow with full validation
   - Automated version bumping
   - minisign signing integration

4. **Security Features**
   - minisign signing support
   - Checksum generation
   - Public key verification

5. **Documentation**
   - Comprehensive integration guide
   - Token list policy
   - Authoring guide
   - Changelog tracking

### ✅ What Uniswap Has That We Use

1. **Official Schema**
   - JSON Schema from `@uniswap/token-lists`
   - TypeScript type definitions
   - Standard specification compliance

2. **Package Ecosystem**
   - npm package for easy integration
   - Type definitions for TypeScript projects
   - Schema validation utilities

---

## Code Comparison

### Schema Access

**Uniswap Approach:**
```typescript
import { schema } from '@uniswap/token-lists'
import { TokenList, TokenInfo } from '@uniswap/token-lists'
```

**Our Approach (Before):**
```javascript
const SCHEMA_URL = 'https://uniswap.org/tokenlist.schema.json';
const schema = await fetch(SCHEMA_URL).then(r => r.json());
```

**Our Approach (After):**
```javascript
import { schema } from '@uniswap/token-lists';
// Falls back to URL fetch if package unavailable
```

### Validation

**Uniswap Approach:**
```typescript
import Ajv from 'ajv';
import addFormats from 'ajv-formats';
import { schema } from '@uniswap/token-lists';

const ajv = new Ajv({ allErrors: true, verbose: true });
addFormats(ajv);
const validate = ajv.compile(schema);
const valid = validate(tokenList);
```

**Our Approach:**
```javascript
// Uses @uniswap/token-lists schema + enhanced validation
const schema = await getSchema(); // From package or URL
const validate = ajv.compile(schema);
const valid = validate(tokenList);

// Plus additional checks:
// - EIP-55 checksum validation
// - Duplicate detection
// - Chain ID strict validation
// - Logo URL validation
```

---

## Best Practices Alignment

### ✅ We Follow Uniswap Best Practices

1. **Semantic Versioning**
   - ✅ Major: token removals
   - ✅ Minor: token additions
   - ✅ Patch: metadata updates

2. **File Naming**
   - ✅ `.tokenlist.json` extension for schema validation

3. **Schema Compliance**
   - ✅ All required fields
   - ✅ Optional fields where appropriate
   - ✅ Proper tag definitions

4. **Hosting**
   - ✅ HTTPS endpoints
   - ✅ CORS headers configured
   - ✅ Public accessibility

### ✅ We Enhance Beyond Uniswap

1. **Validation Rigor**
   - Stricter validation than base spec
   - On-chain verification
   - Security checks

2. **Automation**
   - CI/CD integration
   - Automated releases
   - Signature generation

3. **Documentation**
   - Comprehensive guides
   - Policy documentation
   - Integration examples

---

## Integration Status

### ✅ Completed

- [x] Added `@uniswap/token-lists` package dependency
- [x] Updated validation script to use package schema
- [x] Maintained fallback to URL fetch
- [x] Enhanced validation beyond base spec
- [x] TypeScript types available for future use

### 🔄 Available But Not Required

- [ ] TypeScript migration (current scripts are JavaScript)
- [ ] Direct type imports in validation scripts
- [ ] Token list registry integration

---

## Recommendations

### ✅ Implemented

1. **Use Official Package** ✅
   - Now using `@uniswap/token-lists` for schema
   - Maintains compatibility with specification

2. **Enhanced Validation** ✅
   - Kept our enhanced validation features
   - Adds value beyond base specification

3. **Type Safety** ✅
   - TypeScript types available from package
   - Can be used in TypeScript projects

### 💡 Future Enhancements

1. **TypeScript Migration**
   - Convert validation scripts to TypeScript
   - Use `TokenList` and `TokenInfo` types directly

2. **Token List Registry**
   - Consider creating a registry similar to Uniswap's
   - Enable discovery and aggregation

3. **Automated Token Discovery**
   - Explore DefiLlama adapter patterns
   - Auto-populate from on-chain data

---

## Conclusion

Our implementation:

- ✅ **Complies** with Uniswap Token Lists specification
- ✅ **Uses** official `@uniswap/token-lists` package
- ✅ **Enhances** with additional validation and security
- ✅ **Maintains** backward compatibility
- ✅ **Provides** comprehensive tooling and documentation

**Status**: Fully aligned with Uniswap specification while providing enhanced features for production use.

---

**Last Updated**: 2026-01-26
