Rollup can't see named export from commonjs module - node.js

Question

I have a simple AWS Lambda function (state-info.ts) which I am tree-shaking with Rollup and it is giving me the following error:
[!] Error: 'DB' is not exported by ../../forest-fire/abstracted-admin/lib/index.js
https://github.com/rollup/rollup/wiki/Troubleshooting#name-is-not-exported-by-module
src/state-info.ts (10:9)
8: import { Lambda } from "aws-sdk";
9: import { STATES } from "./models/shared";
10: import { DB } from "abstracted-admin";
^
11: import { StateInfo } from "./models/StateInfo";
12: import { IApiResponse } from "./shared/ApiRetriever";
Now it just so happens that I wrote the module abstracted-admin (currently at v0.6.5 on npm) which it is complaining about and it DOES export DB as a named export (and as the default export). But for some reason Rollup is unhappy.
I've created a video walk-through of everything for full context: video.
For those of you who don't like video, here are the key facts/files:
abstracted-admin/lib/index.d.ts:
import { DB } from "./db";
export default DB;
export { DB, IFirebaseConfig, IFirebaseListener } from "./db";
abstracted-admin/lib/index.js:
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const db_1 = require("./db");
exports.default = db_1.DB;
var db_2 = require("./db");
exports.DB = db_2.DB;
and from within the abstracted-admin/package.json:
{
...
"files": ["lib"],
"main": "lib/index.js",
"typings": "lib/index.d.ts",
}
state-info.ts (aka, the file being rolled up):
import {
IDictionary,
AWSGatewayCallback,
IAWSGatewayRequest,
IAWSGatewayResponse
} from "common-types";
import GetStateInfo from "./vote-smart/get-state-info";
import { Lambda } from "aws-sdk";
import { STATES } from "./models/shared";
import { DB } from "abstracted-admin";
import { StateInfo } from "./models/StateInfo";
import { IApiResponse } from "./shared/ApiRetriever";
/** ... */
Meanwhile my rollup config is:
import cjs from "rollup-plugin-commonjs";
import resolve from "rollup-plugin-node-resolve";
import json from "rollup-plugin-json";
import ts from "rollup-plugin-typescript2";
import globals from "rollup-plugin-node-globals";
export default {
input: "src/state-info.ts",
output: {
file: "lib/state-info-rolled.js",
format: "cjs"
},
external: ["aws-sdk"],
plugins: [
globals(),
json(),
cjs({
include: "node_modules/**",
exclude: ["node_modules/aws-sdk/**"]
}),
ts(),
resolve({
jsnext: true,
main: true,
browser: false,
preferBuiltins: false,
extensions: [".js", ".json"]
})
]
};

Answer 1

I believe Rollup expects the below in this situation:
import admin from "abstracted-admin";
const { DB } = admin;
It's different from Webpack's behavior and has caught me a few times.