rollup.config.js

import commonjs from "@rollup/plugin-commonjs";
import resolve from "@rollup/plugin-node-resolve";
import peerDepsExternal from "rollup-plugin-peer-deps-external";
import typescript from "rollup-plugin-typescript2";
import babel from "@rollup/plugin-babel";

export default {
  input: "./src/index.ts",
  output: {
    format: "cjs",
    dir: "dist/",
    exports: "named",
    sourcemap: true,
    strict: true,
  },
  plugins: [
    peerDepsExternal(),
    resolve({
      preferBuiltins: true,
    }),
    commonjs(),
    typescript(),
    babel({
      exclude: "node_modules/**",
    }),
  ],
  external: ["ethers", "web3"],
};