start-sdk/lib/migrations/Migration.ts

import { ManifestVersion } from "../manifest/ManifestTypes";
import { Effects } from "../types";
import { Utils } from "../util";

export class Migration<Version extends ManifestVersion> {
  constructor(
    readonly options: {
      version: Version;
      up: (opts: { effects: Effects }) => Promise<void>;
      down: (opts: { effects: Effects }) => Promise<void>;
    },
  ) {}
  static of<Version extends ManifestVersion>(options: {
    version: Version;
    up: (opts: { effects: Effects }) => Promise<void>;
    down: (opts: { effects: Effects }) => Promise<void>;
  }) {
    return new Migration(options);
  }

  async up(opts: { effects: Effects }) {
    this.up(opts);
  }

  async down(opts: { effects: Effects }) {
    this.down(opts);
  }
}