feat(projection): export ProjectionsEvent and SinkEventType type utils

Author: mkazlauskas

packages/projection/src/projectIntoSink.ts

@@ -48,7 +48,9 @@ type ProjectionTypes<P> = {
 };
 // https://stackoverflow.com/a/50375286
 type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (k: infer I) => void ? I : never;
-type ProjectionsEvent<P extends object> = UnifiedProjectorEvent<UnionToIntersection<ProjectionTypes<P>[keyof P]>>;
+export type ProjectionsEvent<P extends object> = UnifiedProjectorEvent<
+  UnionToIntersection<ProjectionTypes<P>[keyof P]>
+>;
 
 const isIntersectionBlock = (block: Cardano.Block, intersection: Intersection) => {
   if (intersection.point === 'origin') {

packages/projection/src/sinks/types.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
 import { Cardano } from '@cardano-sdk/core';
 import { Observable } from 'rxjs';
 import { ProjectionExtraProps } from '../projections';
@@ -45,7 +46,6 @@ export type ProjectionSinks<Projections> = {
   [k in keyof Projections]: Sink<Projections[k]>;
 };
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type SinkLifecycleOperator = (evt$: Observable<any>) => Observable<any>;
 
 export type Sinks<Projections> = {
@@ -54,3 +54,6 @@ export type Sinks<Projections> = {
   before?: SinkLifecycleOperator;
   after?: SinkLifecycleOperator;
 };
+
+type InferArg<T> = T extends (arg: infer Arg) => any ? Arg : never;
+export type SinkEventType<S extends { sink: any }> = InferArg<S['sink']>;