rough draft attempt to get from stEth to providing LP tokens to Yearn's new Rocket Pool vault - THIS MIGHT NOT WORK USE AT YOUR OWN RISK

stEthToYearn.ts

import { Contract, Provider } from "ethers-multicall";
import { ethers } from 'ethers';
import { JsonFragment } from "@ethersproject/abi";

import { crvAbi } from './abis/crv';
import * as wstEthAbi from './abis/wsteth.json';
import * as yAbi from './abis/yAbi.json';
import * as erc20Abi from "../artifacts/@openzeppelin/contracts/token/ERC20/IERC20.sol/IERC20.json"
const provider = new ethers.providers.AlchemyProvider("mainnet", process.env.ALCHEMY_API);

const crvFactoryAddress = '0x447Ddd4960d9fdBF6af9a790560d0AF76795CB08';
const stEthAddress = '0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84'
const wstEthAddress = '0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0';
const rEthAddress = '0xae78736Cd615f374D3085123A210448E74Fc6393';
const yAddress = '0x5c0A86A32c129538D62C106Eb8115a8b02358d57'

async function call() {
  const ethcallProvider = new Provider(provider);
  await ethcallProvider.init();

  const steth = new Contract(stEthAddress, erc20Abi.abi);
  const wstEth = new Contract(wstEthAddress, wstEthAbi);
  const crv = new Contract(crvFactoryAddress, crvAbi.abi as JsonFragment[]);
  const rEth = new Contract(rEthAddress, erc20Abi.abi);
  const y = new Contract(yAddress, yAbi as JsonFragment[]);
  
  const origBalance = await steth.balanceOf("wschwab.eth");
  const wstEthProjected = await wstEth.getWstETHByStETH(origBalance);
  const rEthProjected = await crv.get_dy(1,0,wstEthProjected.div(2))
  const wrapCall = wstEth.wrap(origBalance);
  const swapCall = crv.exchange(1,0,wstEthProjected.div(2));

  const yCall = y.deposit();
  await ethcallProvider.all([
    wrapCall,
    swapCall,
    crv.addLiquidity(
      [
        rEthProjected,
        wstEthProjected.div(2)
      ],
      1,
      "wschwab.eth"
    ),
    yCall
  ]);
}

call()
.then(() => process.exit(0))
.catch(error => {
  // tslint:disable-next-line: no-console
  console.error(error);
  process.exit(1);
});