1. Purpose
The REST and GraphQL APIs in TLaaS (LEX) provide developers, applications, and ecosystem participants with reliable access to license data. These APIs allow querying of license status, metadata, and transaction history, enabling seamless integration with external platforms while maintaining interoperability with TLAAS (DLA) and DAL.
2. Why APIs Are Important
- Enable DApps, marketplaces, and analytics tools to pull license data in real time.
- Provide a standardized way for third-party systems to interact with TLaaS.
- Support governance, compliance, and dispute resolution processes with accurate data.
3. REST API Structure
3.1 Common Endpoints
- GET /licenses/{id}
- GET /licenses/owner/{address}
- POST /licenses/validate
- GET /transactions/{licenseId}
4. GraphQL API Structure
GraphQL offers flexible querying, allowing clients to request only the data they need.
Example Query:
query {
license(id: "12345") {
id
issuer
holder
expiryDate
rights
royaltyTerms {
issuer
validators
}
}
}
Example Response:
{
"data": {
"license": {
"id": "12345",
"issuer": "0x123...",
"holder": "0x456...",
"expiryDate": "2026-08-08T00:00:00Z",
"rights": ["commercial"],
"royaltyTerms": {"issuer": 40, "validators": 20}
}
}
}
5. Security Considerations
- Authentication: Require API keys or wallet signatures for restricted endpoints.
- Rate Limiting: Prevent abuse and ensure service availability.
- Data Integrity: Validate data pulled from smart contracts to avoid stale information.
6. Integration with TLaaS, TLAAS, and DAL
- TLaaS (LEX): Serves license data for marketplace operations.
- TLAAS (DLA): Confirms license validity through validator checks.
- DAL: Accesses dispute and governance records related to licenses.
7. Benefits
- Provides developers with flexible and efficient data access.
- Simplifies integration for ecosystem partners.
- Reduces load on on-chain queries by serving verified off-chain data.
Next Article: Multi-Sig & Key Management — Securing Critical Admin Functions