Poly Flashloan Bot

An open source flashloan bot on polygon network

Documentation

Note: This bot just demonstrates how you can run a flashloan bot on polygon and is not designed to make profits (Reasons why my flashloan bot didn't work).

Prerequisites

This flashloan bot works with the smart contract.

You need to deploy your own smart contract on polygon mainnet if you want to run this bot.

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-flashloan-bot.git
$ cd poly-flashloan-bot

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>'

If you want to execute flashloan on the polygon mainnet, you need to add your PRIVATE_KEY environment variable as well, 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.Build

yarn build

4. Run Bot

yarn start

Configuration

Edit src/config.ts

Optimal Bot Configuration

If you have deployed your own contract, replace flashloan address to your deployed smart contract address.

export const flashloanAddress = "<your-deployed-contract-address>";

Note: If you update the flashloan smart contract, you need to replace this ABI to the new one.

ABI

This flashloan bot uses an ABI from this flashloan smart contract.

If you update the flashloan smart contract, you need to replace this ABI to the new one.

Docker

source startup.sh

All supported liquidity protocols

curl -X GET "https://api.1inch.exchange/v3.0/137/protocols" -H  "accept: application/json"
curl -X GET "https://api.1inch.exchange/v4.0/137/liquidity-sources" -H  "accept: application/json"

{
  "protocols": [
    "POLYGON_SAFE_SWAP",
    "POLYGON_APESWAP",
    "IRONSWAP",
    "POLYGON_JETSWAP",
    "POLYGON_DODO",
    "POLYGON_DODO_V2",
    "POLYGON_KYBER_DMM",
    "POLYGON_BALANCER_V2",
    "POLYGON_WAULTSWAP",
    "DFYN",
    "POLYGON_ONE_INCH_LIMIT_ORDER",
    "POLYDEX_FINANCE",
    "ONESWAP",
    "FIREBIRD_FINANCE",
    "POLYGON_MSTABLE",
    "POLYGON_SUSHISWAP",
    "POLYGON_QUICKSWAP",
    "WMATIC",
    "POLYGON_CURVE",
    "POLYGON_AAVE_V2",
    "COMETH",
    "POLYGON_DFX_FINANCE",
    "POLYGON_CURVE_V2"
  ]
}

All supported tokens

curl -X GET "https://api.1inch.exchange/v3.0/137/tokens" -H  "accept: application/json"
curl -X GET "https://api.1inch.exchange/v4.0/137/tokens" -H  "accept: application/json"

Debug transactions

ts-node src/debug.ts 0xc3ec5defe7b6b8a5e4a4f083b5d67110637f3074c84a4808c607cca1f544daa8

{
  hash: '0xc3ec5defe7b6b8a5e4a4f083b5d67110637f3074c84a4808c607cca1f544daa8',
  from: '0x4d844504470f7E43740af80BD5462022F69FeFB0',
  to: '0xe43A0003955f8745c77A2A987Afa316D6B9828B3',
  gasPrice: 30000000000,
  gasLimit: 15000000,
  nonce: 46,
  blockNumber: 22593589
}
{
  name: 'dodoFlashLoan',
  params: {
    flashLoanPool: 'USDC_DAI',
    loanAmount: 10000000000,
    firstRoutes: [
      'POLYGON_QUICKSWAP: DAI → WETH',
      'POLYGON_APESWAP: WETH → MATIC',
      'POLYGON_QUICKSWAP: MATIC → USDT'
    ],
    secondRoutes: [
      'POLYGON_SUSHISWAP: USDT → WETH',
      'POLYGON_QUICKSWAP: WETH → MATIC',
      'POLYGON_APESWAP: MATIC → DAI'
    ]
  }
}

0xc3ec5defe7b6b8a5e4a4f083b5d67110637f3074c84a4808c607cca1f544daa8

MATIC: eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
USDT: c2132d05d31c914a87c6611c10748aeb04b58e8f
WETH: 7ceb23fd6bc0add59e62ac25578270cff1b9f619
DAI: 8f3cf7ad23cd3cadbd9735aff958023239c6a063

USDC_DAI: aaE10Fa31E73287687ce56eC90f81A800361B898

firstRoutes
POLYGON_QUICKSWAP: a5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff DAI
POLYGON_APESWAP: C0788A3aD43d79aa53B09c2EaCc313A787d1d607
POLYGON_QUICKSWAP: a5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff

secondRoutes
POLYGON_SUSHISWAP: 1b02dA8Cb0d097eB8D57A175b88c7D8b47997506
POLYGON_QUICKSWAP: a5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff
POLYGON_APESWAP: C0788A3aD43d79aa53B09c2EaCc313A787d1d607

b27f6a250000000000000000000000000000000000000000000000000000000000000020000000000000000000000000aae10fa31e73287687ce56ec90f81a800361b89800000000000000000000000000000000000000000000000000000002540be400000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000002e000000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001a00000000000000000000000000000000000000000000000000000000000000040000000000000000000000000a5e0829caced8ffdd4de3c43696c57f7d7a678ff00000000000000000000000000000000000000000000000000000000000000020000000000000000000000008f3cf7ad23cd3cadbd9735aff958023239c6a0630000000000000000000000007ceb23fd6bc0add59e62ac25578270cff1b9f6190000000000000000000000000000000000000000000000000000000000000040000000000000000000000000c0788a3ad43d79aa53b09c2eacc313a787d1d60700000000000000000000000000000000000000000000000000000000000000020000000000000000000000007ceb23fd6bc0add59e62ac25578270cff1b9f619000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000a5e0829caced8ffdd4de3c43696c57f7d7a678ff0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee000000000000000000000000c2132d05d31c914a87c6611c10748aeb04b58e8f00000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001a000000000000000000000000000000000000000000000000000000000000000400000000000000000000000001b02da8cb0d097eb8d57a175b88c7d8b479975060000000000000000000000000000000000000000000000000000000000000002000000000000000000000000c2132d05d31c914a87c6611c10748aeb04b58e8f0000000000000000000000007ceb23fd6bc0add59e62ac25578270cff1b9f6190000000000000000000000000000000000000000000000000000000000000040000000000000000000000000a5e0829caced8ffdd4de3c43696c57f7d7a678ff00000000000000000000000000000000000000000000000000000000000000020000000000000000000000007ceb23fd6bc0add59e62ac25578270cff1b9f619000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000c0788a3ad43d79aa53b09c2eacc313a787d1d6070000000000000000000000000000000000000000000000000000000000000002000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee0000000000000000000000008f3cf7ad23cd3cadbd9735aff958023239c6a063

References

• Flashloan Arbitrage Trades are Still Profitable
• Reasons why my flashloan bot didn't work