EventWinner Smart Contract

A Solidity smart contract implementation that demonstrates external contract interaction on the Ethereum blockchain.

This is the answer to stackoverflow question: Error: cannot estimate gas; transaction may fail or may require manual gas limit (Sepolia test Network)

Overview

The EventWinner project showcases a smart contract that can interact with other contracts through their interfaces. It implements a pattern for making external calls to contracts that expose an attempt() function.

Technical Stack

• Solidity ^0.8.27
• Hardhat
• TypeScript
• Ethers.js

Contract Architecture

EventWinner.sol

The main contract contains:

• Interface definition for target contracts
• External function to interact with other contracts
• Low-level call implementation for robust contract interaction

Key Features

• External contract interaction
• Interface-based calling
• Gas-efficient implementation
• Error handling

Usage

The contract can be used to interact with any contract that implements the attempt() function:

// Get contract instance
const eventWinner = await EventWinner.deploy();

// Call target contract
await eventWinner.callWinner(targetContractAddress);

Development

1. Clone the repository

git clone https://github.com/imcrazysteven/Hardhat-Winner-Event.git

2. Install dependencies:

npm install

3. Compile contracts:

npx hardhat compile

4. Run deployment script:

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

Network support

• Sepolia
• Local hardhat Network

License

This project is licensed under the MIT License.

📞 Contact & Support

• Email: imcrazysteven143@gmail.com
• GitHub: Steven (@imcrazysteven)
• Telegram: @imcrazysteven
• Twitter: @imcrazysteven
• Instagram: @imcrazysteven

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