Unable to compile Typescript when npm run start

[yuyasugano]

I embedded environmental variables in .env and ran npm run start. Here's the error I encountered "Unable to compile TypeScript". Is there any defects in the current code?? Thanks.

$ npm run start
> @flashbots/[email protected] start /home/ether/work/javascript/simple-arbitrage
> npx ts-node --project tsconfig.json src/index.ts

? Unable to compile TypeScript:
src/index.ts:56:49 - error TS2339: Property 'getUniswapMarketsByToken' does not exist on type 'typeof UniswappyV2EthPair'.

56   const markets: any = await UniswappyV2EthPair.getUniswapMarketsByToken(provider, FACTORY_ADDRESSES);
                                                   ~~~~~~~~~~~~~~~~~~~~~~~~
src/index.ts:58:30 - error TS2339: Property 'updateReserves' does not exist on type 'typeof UniswappyV2EthPair'.

58     await UniswappyV2EthPair.updateReserves(provider, markets.allMarketPairs);
                                ~~~~~~~~~~~~~~

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @flashbots/[email protected] start: `npx ts-node --project tsconfig.json src/index.ts`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @flashbots/[email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/.npm/_logs/2021-08-09T05_29_01_383Z-debug.log