setup plasma client

getPlasmaClient.ts

import {
  getRootUser,
  getChildUser,
  getPrivateKeyGoerli,
  getInfuraProjectId,
  getPrivateKeyMumbai,
} from "../../config";
import { use } from "@maticnetwork/maticjs";
import HDWalletProvider from "@truffle/hdwallet-provider";
import { PlasmaClient } from "@maticnetwork/maticjs-plasma";
import { Web3ClientPlugin } from "@maticnetwork/maticjs-web3";

use(Web3ClientPlugin);

export async function getPlasmaClient(
  network = "testnet", // 'testnet' or 'mainnet'
  version = "mumbai" // 'mumbai' or 'v1'
): Promise<PlasmaClient | undefined> {
  try {
    const plasmaClient: PlasmaClient = new PlasmaClient();

    return await plasmaClient.init({
      network: network,
      version: version,
      parent: {
        provider: new HDWalletProvider(
          [getPrivateKeyGoerli()],
          `https://goerli.infura.io/v3/${getInfuraProjectId()}`
        ),
        defaultConfig: {
          from: getRootUser(),
        },
      },
      child: {
        provider: new HDWalletProvider(
          [getPrivateKeyMumbai()],
          `https://polygon-mumbai.infura.io/v3/${getInfuraProjectId()}`
        ),
        defaultConfig: {
          from: getChildUser(),
        },
      },
    });
  } catch (error) {
    console.log("error unable to initiate plasmaClient", error);
  }
}