authorization-patterns

Role-based access control in a Fastify application is implemented by defining specific user roles, assigning granular permissions to them, and attaching middleware to validate requests before granting access to resources.

RBAC manages access by assigning static permissions to defined user roles, whereas ABAC evaluates dynamic access decisions based on user attributes, resource attributes, and environmental context conditions.

Dynamic access control policies are established using Attribute-Based Access Control (ABAC) to evaluate user attributes, resource properties, and environmental conditions to make real-time access decisions.

TypeScript can enforce granular permissions by defining strongly typed roles, policies, and authorization middleware that validate user requests against permitted actions and resource constraints.

Attribute-based access control should be used instead of role-based permissions when your application requires dynamic, context-aware access decisions based on varying resource attributes or environmental conditions rather than static roles.

The best way to structure authorization middleware is to define clear roles and policies that intercept incoming requests, validate user permissions against the target resource, and deny access if conditions are not met.