(WIP) Add state-store utils

eslint.config.js

@@ -7,4 +7,9 @@ export default tseslint.config(
   eslint.configs.recommended,
   ...tseslint.configs.strict,
   ...tseslint.configs.stylistic,
+  {
+    rules: {
+      "@typescript-eslint/no-namespace": "off",
+    },
+  },
 );

packages/fabric/core/src/domain/events/event.ts

@@ -1,10 +1,12 @@
 import { TaggedVariant } from "../../variant/variant.js";
+import { UUID } from "../types/uuid.js";
 
 /**
  * An event is a tagged variant with a payload and a timestamp.
  */
 export interface Event<TTag extends string, TPayload>
   extends TaggedVariant<TTag> {
+  streamId: UUID;
   payload: TPayload;
   timestamp: number;
 }

packages/fabric/core/src/domain/models/create-model.ts

@@ -0,0 +1,32 @@
+import { FieldDefinition } from "./fields/index.js";
+
+export interface ModelDefinition<
+  TName extends string = string,
+  TFields extends Record<string, FieldDefinition> = Record<
+    string,
+    FieldDefinition
+  >,
+> {
+  name: TName;
+  fields: TFields;
+}
+
+export type ModelName<
+  TModel extends ModelDefinition<string, Record<string, FieldDefinition>>,
+> = TModel["name"];
+
+export type ModelFromName<
+  TModels extends ModelDefinition<string, Record<string, FieldDefinition>>,
+  TName extends ModelName<TModels>,
+> = Extract<TModels, { name: TName }>;
+
+export type ModelFieldNames<
+  TModel extends ModelDefinition<string, Record<string, FieldDefinition>>,
+> = keyof TModel["fields"];
+
+export function createModel<
+  TName extends string,
+  TFields extends Record<string, FieldDefinition>,
+>(opts: ModelDefinition<TName, TFields>): ModelDefinition<TName, TFields> {
+  return opts;
+}

packages/fabric/core/src/domain/models/fields/base-field.ts

@@ -0,0 +1,5 @@
+export interface BaseField {
+  isOptional?: boolean;
+  isUnique?: boolean;
+  isIndexed?: boolean;
+}

packages/fabric/core/src/domain/models/fields/field-to-type.ts

@@ -0,0 +1,9 @@
+import { UUID } from "../../types/uuid.js";
+import { StringField } from "./string-field.js";
+import { UUIDField } from "./uuid-field.js";
+
+export type FieldToType<TField> = TField extends StringField
+  ? string
+  : TField extends UUIDField
+    ? UUID
+    : never;

packages/fabric/core/src/domain/models/fields/index.ts

@@ -0,0 +1,9 @@
+import { createStringField, StringField } from "./string-field.js";
+import { createUUIDField } from "./uuid-field.js";
+
+export type FieldDefinition = StringField;
+
+export namespace Field {
+  export const string = createStringField;
+  export const uuid = createUUIDField;
+}

packages/fabric/core/src/domain/models/fields/string-field.ts

@@ -0,0 +1,20 @@
+import { TaggedVariant, VariantTag } from "../../../variant/variant.js";
+import { BaseField } from "./base-field.js";
+
+export interface StringFieldOptions extends BaseField {
+  maxLength?: number;
+  minLength?: number;
+}
+
+export interface StringField
+  extends TaggedVariant<"StringField">,
+    StringFieldOptions {}
+
+export function createStringField<T extends StringFieldOptions>(
+  opts: T,
+): StringField & T {
+  return {
+    [VariantTag]: "StringField",
+    ...opts,
+  } as const;
+}

packages/fabric/core/src/domain/models/fields/uuid-field.ts

@@ -0,0 +1,15 @@
+import { TaggedVariant, VariantTag } from "../../../variant/variant.js";
+import { BaseField } from "./base-field.js";
+
+export interface UUIDOptions extends BaseField {
+  isPrimaryKey?: boolean;
+}
+
+export interface UUIDField extends TaggedVariant<"UUID_FIELD">, UUIDOptions {}
+
+export function createUUIDField(opts: UUIDOptions): UUIDField {
+  return {
+    [VariantTag]: "UUID_FIELD",
+    ...opts,
+  };
+}

packages/fabric/core/src/domain/models/model-to-type.ts

@@ -0,0 +1,6 @@
+import { ModelDefinition } from "./create-model.js";
+import { FieldToType } from "./fields/field-to-type.js";
+
+export type ModelToType<TModel extends ModelDefinition> = {
+  [K in keyof TModel["fields"]]: FieldToType<TModel["fields"][K]>;
+};

packages/fabric/core/src/domain/models/relations/index.ts

@@ -0,0 +1,5 @@
+import { OneToOneRelation } from "./one-to-one.js";
+
+export type RelationDefinition = OneToOneRelation<string, string>;
+
+export namespace Relations {}

packages/fabric/core/src/domain/models/relations/one-to-many.ts

@@ -0,0 +1,34 @@
+import { TaggedVariant, VariantTag } from "../../../variant/variant.js";
+
+export interface OneToManyRelationOptions<
+  TOwner extends string,
+  TTarget extends string,
+> {
+  /**
+   * The owner of the relation. In this case is the "one" side of the relation.
+   */
+  owner: TOwner;
+
+  /**
+   * The target of the relation. In this case is the "many" side of the relation.
+   */
+  target: TTarget;
+}
+
+export interface OneToManyRelation<
+  TOwner extends string,
+  TTarget extends string,
+> extends TaggedVariant<"ONE_TO_MANY_RELATION">,
+    OneToManyRelationOptions<TOwner, TTarget> {}
+
+export function createOneToManyRelation<
+  TOwner extends string,
+  TTarget extends string,
+>(
+  opts: OneToManyRelationOptions<TOwner, TTarget>,
+): OneToManyRelation<TOwner, TTarget> {
+  return {
+    [VariantTag]: "ONE_TO_MANY_RELATION",
+    ...opts,
+  };
+}

packages/fabric/core/src/domain/models/relations/one-to-one.ts

@@ -0,0 +1,33 @@
+import { TaggedVariant, VariantTag } from "../../../variant/variant.js";
+
+export interface OneToOneRelationOptions<
+  TOwner extends string,
+  TTarget extends string,
+> {
+  /**
+   * The owner of the relation.
+   */
+  owner: TOwner;
+
+  /**
+   * The target of the relation
+   *
+   */
+  target: TTarget;
+}
+
+export interface OneToOneRelation<TOwner extends string, TTarget extends string>
+  extends TaggedVariant<"ONE_TO_ONE_RELATION">,
+    OneToOneRelationOptions<TOwner, TTarget> {}
+
+export function createOneToOneRelation<
+  TOwner extends string,
+  TTarget extends string,
+>(
+  opts: OneToOneRelationOptions<TOwner, TTarget>,
+): OneToOneRelation<TOwner, TTarget> {
+  return {
+    [VariantTag]: "ONE_TO_ONE_RELATION",
+    ...opts,
+  };
+}

packages/fabric/core/src/domain/security/index.ts

@@ -1 +1 @@
-export * from "./policy-map.js";
+export * from "./policy.js";

packages/fabric/core/src/domain/security/policy-map.ts

@@ -1,7 +0,0 @@
-/**
- * A PolicyMap maps user types to their security policies.
- */
-export type PolicyMap<
-  UserType extends string,
-  PolicyType extends string,
-> = Record<UserType, PolicyType[]>;

packages/fabric/core/src/domain/security/policy.ts

@@ -0,0 +1,7 @@
+/**
+ * A Policy maps permissions to which user types are allowed to perform them.
+ */
+export type Policy<
+  TUserType extends string,
+  TPolicyType extends string,
+> = Record<TPolicyType, TUserType[]>;

packages/fabric/core/src/domain/use-case/use-case-definition.ts

@@ -1,51 +1,37 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
 import { TaggedError } from "../../error/tagged-error.js";
 import { UseCase } from "./use-case.js";
 
 export type UseCaseDefinition<
+  TDependencies = any,
+  TPayload = any,
+  TOutput = any,
+  TErrors extends TaggedError<string> = any,
+> = BasicUseCaseDefinition<TDependencies, TPayload, TOutput, TErrors>;
+
+interface BasicUseCaseDefinition<
   TDependencies,
   TPayload,
   TOutput,
   TErrors extends TaggedError<string>,
-> = TPayload extends undefined
+> {
-  ? {
+  /**
-      /**
+   * The use case name.
-       * The use case name.
+   */
-       */
+  name: string;
-      name: string;
 
-      /**
+  /**
-       * Whether the use case requires authentication or not.
+   * Whether the use case requires authentication or not.
-       */
+   */
-      isAuthRequired?: boolean;
+  isAuthRequired: boolean;
 
-      /**
+  /**
-       * The required permissions to execute the use case.
+   * The required permissions to execute the use case.
-       */
+   **/
-      requiredPermissions?: string[];
+  requiredPermissions?: string[];
 
-      /**
+  /**
-       * The use case function.
+   * The use case function.
-       */
+   */
-      useCase: UseCase<TDependencies, TPayload, TOutput, TErrors>;
+  useCase: UseCase<TDependencies, TPayload, TOutput, TErrors>;
-    }
+}
-  : {
-      /**
-       * The use case name.
-       */
-      name: string;
-
-      /**
-       * Whether the use case requires authentication or not.
-       */
-      isAuthRequired?: boolean;
-
-      /**
-       * The required permissions to execute the use case.
-       */
-      requiredPermissions?: string[];
-
-      /**
-       * The use case function.
-       */
-      useCase: UseCase<TDependencies, TPayload, TOutput, TErrors>;
-    };

packages/fabric/core/src/index.ts

@@ -3,5 +3,6 @@ export * from "./domain/index.js";
 export * from "./error/index.js";
 export * from "./record/index.js";
 export * from "./result/index.js";
+export * from "./time/index.js";
 export * from "./types/index.js";
 export * from "./variant/index.js";

packages/fabric/core/src/storage/driver.ts

@@ -0,0 +1,54 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+import { ModelDefinition } from "../domain/models/create-model.js";
+import { TaggedError } from "../error/tagged-error.js";
+import { AsyncResult } from "../result/async-result.js";
+import { QueryDefinition } from "./query/query.js";
+import { CircularDependencyError } from "./utils/sort-by-dependencies.js";
+
+export interface StorageDriver {
+  /**
+   * Insert data into the store
+   */
+  insert(collectionName: string, record: any): AsyncResult<void, QueryError>;
+
+  /**
+   * Run a select query against the store.
+   */
+  select(query: QueryDefinition): AsyncResult<any[], QueryError>;
+
+  /**
+   * Run a select query against the store.
+   */
+  selectOne(query: QueryDefinition): AsyncResult<any, QueryError>;
+
+  /**
+   * Sincronice the store with the schema.
+   */
+  sync(
+    schema: ModelDefinition[],
+  ): AsyncResult<void, QueryError | CircularDependencyError>;
+
+  /**
+   * Drop the store. This is a destructive operation.
+   */
+  drop(): AsyncResult<void, QueryError>;
+
+  /**
+   * Update a record in the store.
+   */
+  update(
+    collectionName: string,
+    id: string,
+    record: Record<string, any>,
+  ): AsyncResult<void, QueryError>;
+}
+
+export class QueryError extends TaggedError<"QueryError"> {
+  constructor(
+    public message: string,
+    public context: any,
+  ) {
+    super("QueryError");
+  }
+}

packages/fabric/core/src/storage/query/filter-options.ts

@@ -0,0 +1,93 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+export type FilterOptions<T = any> =
+  | SingleFilterOption<T>
+  | MultiFilterOption<T>;
+
+export type SingleFilterOption<T = any> = {
+  [K in keyof T]?:
+    | T[K]
+    | LikeFilterOption<T[K]>
+    | ComparisonFilterOption<T[K]>
+    | InFilterOption<T[K]>;
+};
+
+export type MultiFilterOption<T = any> = SingleFilterOption<T>[];
+
+export const FILTER_OPTION_TYPE_SYMBOL = Symbol("$type");
+export const FILTER_OPTION_VALUE_SYMBOL = Symbol("$value");
+export const FILTER_OPTION_OPERATOR_SYMBOL = Symbol("$operator");
+
+export type LikeFilterOption<T> = T extends string
+  ? {
+      [FILTER_OPTION_TYPE_SYMBOL]: "like";
+      [FILTER_OPTION_VALUE_SYMBOL]: string;
+    }
+  : never;
+
+export interface InFilterOption<T> {
+  [FILTER_OPTION_TYPE_SYMBOL]: "in";
+  [FILTER_OPTION_VALUE_SYMBOL]: T[];
+}
+
+export interface ComparisonFilterOption<T> {
+  [FILTER_OPTION_TYPE_SYMBOL]: "comparison";
+  [FILTER_OPTION_OPERATOR_SYMBOL]: ComparisonOperator;
+  [FILTER_OPTION_VALUE_SYMBOL]: T;
+}
+
+export type ComparisonOperator = "<" | ">" | "<=" | ">=" | "<>";
+
+export function isGreaterThan(value: any): ComparisonFilterOption<any> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "comparison",
+    [FILTER_OPTION_OPERATOR_SYMBOL]: ">",
+    [FILTER_OPTION_VALUE_SYMBOL]: value,
+  };
+}
+
+export function isLessThan(value: any): ComparisonFilterOption<any> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "comparison",
+    [FILTER_OPTION_OPERATOR_SYMBOL]: "<",
+    [FILTER_OPTION_VALUE_SYMBOL]: value,
+  };
+}
+
+export function isGreaterOrEqualTo(value: any): ComparisonFilterOption<any> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "comparison",
+    [FILTER_OPTION_OPERATOR_SYMBOL]: ">=",
+    [FILTER_OPTION_VALUE_SYMBOL]: value,
+  };
+}
+
+export function isLessOrEqualTo(value: any): ComparisonFilterOption<any> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "comparison",
+    [FILTER_OPTION_OPERATOR_SYMBOL]: "<=",
+    [FILTER_OPTION_VALUE_SYMBOL]: value,
+  };
+}
+
+export function isNotEqualTo(value: any): ComparisonFilterOption<any> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "comparison",
+    [FILTER_OPTION_OPERATOR_SYMBOL]: "<>",
+    [FILTER_OPTION_VALUE_SYMBOL]: value,
+  };
+}
+
+export function isLike(value: string): LikeFilterOption<string> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "like",
+    [FILTER_OPTION_VALUE_SYMBOL]: value,
+  };
+}
+
+export function isIn<T>(values: T[]): InFilterOption<T> {
+  return {
+    [FILTER_OPTION_TYPE_SYMBOL]: "in",
+    [FILTER_OPTION_VALUE_SYMBOL]: values,
+  };
+}

packages/fabric/core/src/storage/query/order-by-options.ts

@@ -0,0 +1,3 @@
+export type OrderByOptions<T> = {
+  [K in keyof T]?: "ASC" | "DESC";
+};

packages/fabric/core/src/storage/query/query-builder.ts

@@ -0,0 +1,74 @@
+import {
+  ModelDefinition,
+  ModelFromName,
+  ModelName,
+} from "../../domain/models/create-model.js";
+import { ModelToType } from "../../domain/models/model-to-type.js";
+import { AsyncResult } from "../../result/async-result.js";
+import { Keyof } from "../../types/index.js";
+import { QueryError, StorageDriver } from "../driver.js";
+import { FilterOptions } from "./filter-options.js";
+import { OrderByOptions } from "./order-by-options.js";
+import {
+  QueryDefinition,
+  SelectableQuery,
+  StoreLimitableQuery,
+  StoreQuery,
+  StoreSortableQuery,
+} from "./query.js";
+
+export class QueryBuilder<
+  TModels extends ModelDefinition,
+  TEntityName extends ModelName<TModels>,
+  T = ModelToType<ModelFromName<TModels, TEntityName>>,
+> implements StoreQuery<T>
+{
+  constructor(
+    private driver: StorageDriver,
+    private query: QueryDefinition<TEntityName>,
+  ) {}
+
+  where(where: FilterOptions<T>): StoreSortableQuery<T> {
+    this.query = {
+      ...this.query,
+      where,
+    };
+    return this;
+  }
+
+  orderBy(opts: OrderByOptions<T>): StoreLimitableQuery<T> {
+    this.query = {
+      ...this.query,
+      orderBy: opts,
+    };
+    return this;
+  }
+
+  limit(limit: number, offset?: number | undefined): SelectableQuery<T> {
+    this.query = {
+      ...this.query,
+      limit,
+      offset,
+    };
+
+    return this;
+  }
+
+  select<K extends Keyof<T>>(
+    keys?: K[],
+  ): AsyncResult<Pick<T, K>[], QueryError> {
+    return this.driver.select({
+      ...this.query,
+      keys,
+    });
+  }
+
+  selectOne<K extends Keyof<T>>(
+    keys?: K[],
+  ): AsyncResult<Pick<T, K>, QueryError> {
+    return this.driver.selectOne({
+      ...this.query,
+      keys,
+    });
+  }
+}

packages/fabric/core/src/storage/query/query.ts

@@ -0,0 +1,56 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { AsyncResult } from "../../result/async-result.js";
+import { Keyof } from "../../types/keyof.js";
+import { QueryError } from "../driver.js";
+import { FilterOptions } from "./filter-options.js";
+import { OrderByOptions } from "./order-by-options.js";
+
+export interface StoreQuery<T> {
+  where(where: FilterOptions<T>): StoreSortableQuery<T>;
+  orderBy(opts: OrderByOptions<T>): StoreLimitableQuery<T>;
+  limit(limit: number, offset?: number): SelectableQuery<T>;
+
+  select(): AsyncResult<T[], QueryError>;
+  select<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>[], QueryError>;
+
+  selectOne(): AsyncResult<T, QueryError>;
+  selectOne<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>, QueryError>;
+}
+
+export interface StoreSortableQuery<T> {
+  orderBy(opts: OrderByOptions<T>): StoreLimitableQuery<T>;
+  limit(limit: number, offset?: number): SelectableQuery<T>;
+
+  select(): AsyncResult<T[], QueryError>;
+  select<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>[], QueryError>;
+
+  selectOne(): AsyncResult<T, QueryError>;
+  selectOne<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>, QueryError>;
+}
+
+export interface StoreLimitableQuery<T> {
+  limit(limit: number, offset?: number): SelectableQuery<T>;
+
+  select(): AsyncResult<T[], QueryError>;
+  select<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>[], QueryError>;
+
+  selectOne(): AsyncResult<T, QueryError>;
+  selectOne<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>, QueryError>;
+}
+
+export interface SelectableQuery<T> {
+  select(): AsyncResult<T[], QueryError>;
+  select<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>[], QueryError>;
+
+  selectOne(): AsyncResult<T, QueryError>;
+  selectOne<K extends Keyof<T>>(keys: K[]): AsyncResult<Pick<T, K>, QueryError>;
+}
+
+export interface QueryDefinition<K extends string = string> {
+  from: K;
+  where?: FilterOptions<any>;
+  orderBy?: OrderByOptions<any>;
+  limit?: number;
+  offset?: number;
+  keys?: string[];
+}

packages/fabric/core/src/storage/state-store.ts

@@ -0,0 +1,16 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import {
+  ModelDefinition,
+  ModelFromName,
+  ModelName,
+} from "../domain/models/create-model.js";
+import { ModelToType } from "../domain/models/model-to-type.js";
+import { StoreQuery } from "./query/query.js";
+
+export interface StateStore<
+  TModels extends ModelDefinition<string, Record<string, any>>,
+> {
+  from<TEntityName extends ModelName<TModels>>(
+    entityName: TEntityName,
+  ): StoreQuery<ModelToType<ModelFromName<TModels, TEntityName>>>;
+}

packages/fabric/core/src/storage/utils/sort-by-dependencies.spec.ts

@@ -0,0 +1,54 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { describe, expect, it } from "vitest";
+import {
+  CircularDependencyError,
+  sortByDependencies,
+} from "./sort-by-dependencies.js";
+
+describe("sortByDependencies", () => {
+  it("should sort an array of objects by their dependencies", () => {
+    const array = [
+      { id: 1, name: "A", dependencies: ["C", "D"] },
+      { id: 2, name: "B", dependencies: ["A", "D"] },
+      { id: 3, name: "C", dependencies: [] },
+      { id: 4, name: "D", dependencies: [] },
+    ];
+
+    const result = sortByDependencies(array, {
+      keyGetter: (element) => element.name,
+      depGetter: (element) => element.dependencies,
+    });
+
+    expect(result).toEqual([
+      { id: 3, name: "C", dependencies: [] },
+      { id: 4, name: "D", dependencies: [] },
+      { id: 1, name: "A", dependencies: ["C", "D"] },
+      { id: 2, name: "B", dependencies: ["A", "D"] },
+    ]);
+  });
+
+  it("should throw a CircularDependencyError when circular dependencies are detected", () => {
+    const array = [
+      { id: 1, name: "A", dependencies: ["B"] },
+      { id: 2, name: "B", dependencies: ["A"] },
+    ];
+
+    expect(
+      sortByDependencies(array, {
+        keyGetter: (element) => element.name,
+        depGetter: (element) => element.dependencies,
+      }),
+    ).toBeInstanceOf(CircularDependencyError);
+  });
+
+  it("should return an empty array when the input array is empty", () => {
+    const array: any[] = [];
+
+    const result = sortByDependencies(array, {
+      keyGetter: (element) => element.name,
+      depGetter: (element) => element.dependencies,
+    });
+
+    expect(result).toEqual([]);
+  });
+});

packages/fabric/core/src/storage/utils/sort-by-dependencies.ts

@@ -0,0 +1,55 @@
+import { TaggedError } from "../../error/tagged-error.js";
+import { Result } from "../../result/result.js";
+
+export function sortByDependencies<T>(
+  array: T[],
+  {
+    keyGetter,
+    depGetter,
+  }: {
+    keyGetter: (element: T) => string;
+    depGetter: (element: T) => string[];
+  },
+): Result<T[], CircularDependencyError> {
+  const graph = new Map<string, string[]>();
+  const visited = new Set<string>();
+  const sorted: string[] = [];
+  array.forEach((element) => {
+    const key = keyGetter(element);
+    const deps = depGetter(element);
+    graph.set(key, deps);
+  });
+  const visit = (key: string, ancestors: string[]) => {
+    if (visited.has(key)) {
+      return;
+    }
+    ancestors.push(key);
+    const deps = graph.get(key) || [];
+    deps.forEach((dep) => {
+      if (ancestors.includes(dep)) {
+        throw new CircularDependencyError(key, dep);
+      }
+      visit(dep, ancestors.slice());
+    });
+    visited.add(key);
+    sorted.push(key);
+  };
+  try {
+    graph.forEach((deps, key) => {
+      visit(key, []);
+    });
+  } catch (e) {
+    return e as CircularDependencyError;
+  }
+  return sorted.map(
+    (key) => array.find((element) => keyGetter(element) === key) as T,
+  );
+}
+
+export class CircularDependencyError extends TaggedError<"CircularDependencyError"> {
+  context: { key: string; dep: string };
+  constructor(key: string, dep: string) {
+    super("CircularDependencyError");
+    this.context = { key, dep };
+  }
+}

packages/fabric/core/src/types/enum.ts

@@ -0,0 +1 @@
+export type EnumToValues<T extends Record<string, string>> = T[keyof T];

packages/fabric/core/src/types/index.ts

@@ -1,2 +1,4 @@
+export * from "./enum.js";
 export * from "./fn.js";
+export * from "./keyof.js";
 export * from "./optional.js";

packages/fabric/core/src/types/keyof.ts

@@ -0,0 +1,4 @@
+/**
+ * Only string keys are allowed in the keyof type
+ */
+export type Keyof<T> = Extract<keyof T, string>;