wip

packages/shared/domain/Entity.ts

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+export interface IEntity<Id = string> {
+  readonly id: Id;
+}

packages/shared/domain/Service.ts

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+import type { Result } from '../result/Result';
+import type { IDomainError } from '../errors/DomainError';
+
+export interface IDomainService {
+  readonly serviceName?: string;
+}
+
+export interface IDomainCalculationService<Input, Output> extends IDomainService {
+  calculate(input: Input): Output;
+}
+
+export interface IResultDomainCalculationService<Input, Output, Error = IDomainError>
+  extends IDomainService {
+  calculate(input: Input): Result<Output, Error>;
+}
+
+export interface IDomainValidationService<Input, Output, Error = IDomainError>
+  extends IDomainService {
+  validate(input: Input): Result<Output, Error>;
+}
+
+export interface IDomainFactoryService<Input, Output> extends IDomainService {
+  create(input: Input): Output;
+}

packages/shared/domain/ValueObject.ts

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+export interface IValueObject<Props> {
+  readonly props: Props;
+  equals(other: IValueObject<Props>): boolean;
+}

packages/shared/domain/index.ts

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+export * from './Entity';
+export * from './ValueObject';
+export * from './Service';