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@TrpcContext()

The @TrpcContext() decorator injects the tRPC context (or a specific property from it) into a method parameter.

Full Context​

import { Query, Router, TrpcContext } from 'nest-trpc-native';

@Router('users')
class UsersRouter {
  @Query()
  me(@TrpcContext() ctx: { requestId: string; userId: number }) {
    return { id: ctx.userId, requestId: ctx.requestId };
  }
}

Extracting a Property​

Pass a property name to extract a specific value:

@Query()
me(@TrpcContext('userId') userId: number) {
  return { id: userId };
}

Context Setup​

The context object is created by the createContext factory in your module configuration:

TrpcModule.forRoot({
  path: '/trpc',
  createContext: ({ req }) => ({
    requestId: req.headers['x-request-id'] ?? crypto.randomUUID(),
    userId: extractUserId(req),
  }),
});

See Typed Context for how to add compile-time type safety to your context factory.