wallet-core/packages/taler-wallet-cli/rollup.config.js

// rollup.config.js
import commonjs from "@rollup/plugin-commonjs";
import nodeResolve from "@rollup/plugin-node-resolve";
import json from "@rollup/plugin-json";
import builtins from "builtin-modules";
import pkg from "./package.json";

export default {
  input: "lib/index.js",
  output: {
    file: pkg.main,
    format: "cjs",
  },
  external: builtins,
  plugins: [
    nodeResolve({
      preferBuiltins: true,
    }),

    json(),

    commonjs({
      sourceMap: false,
      transformMixedEsModules: true,
    }),
  ],
}