Poly-Flash

An open source flashloan smart contract on polygon network

Installation

1. Install Node.js & yarn, if you haven't already.

2. Clone This Repo

Run the following command.

git clone https://github.com/yuichiroaoki/poly-flash.git
cd poly-flash

Quickstart

1. Setup Environment Variables

You'll need an ALCHEMY_POLYGON_RPC_URL environment variable. You can get one from Alchemy website for free.

Then, you can create a .env file with the following.

ALCHEMY_POLYGON_RPC_URL='<your-own-alchemy-polygon-mainnet-rpc-url>'

Add your Private Key

If you want to execute flashloan on the polygon mainnet, you need to add your PRIVATE_KEY environment variable, with a private key from your wallet.

PRIVATE_KEY='your-PRIVATE_KEY'

*Note: If using metamask, you'll have to add a 0x to the start of your private key)

2. Install Dependencies

Run the following command.

yarn install

3. Compile Smart Contracts

Run the following command.

yarn compile

4. Test on Polygon Mainnet Fork 🔥

Run the following command.

yarn test test/flashloan.test.ts

Deploy

Once you have successfully done the above quickstart and added your private key to .env file, you can deploy your smart contract with the following command:

npx hardhat run scripts/deploy.ts --network polygon

It costs about 0.2 MATIC to deploy Flashloan contract.

Example Contract

https://polygonscan.com/address/0xb6c4448386c4ecf4e5eab057351f8a6a8a465a0d

Available Scripts

In the project directory, you can run:

yarn build

Clears the cache and deletes all artifacts && Compiles the entire project, building all artifacts

yarn clean

Clears the cache and deletes all artifacts

yarn compile

Compiles the entire project, building all artifacts

npx hardhat node

Starts a JSON-RPC server on top of Hardhat Network

yarn test

Runs mocha tests

yarn coverage

Implement a code coverage for tests

yarn account

Show the list of accounts

yarn block-number

Show the current block number

yarn balance (account's address)

Show an account's balance

References

https://hardhat.org/guides/create-task.html