PromptBase
🤖 GPT
"Unlock the Power of Smart Contracts Without Breaking a Sweat! Get Your Custom Ethereum Smart Contracts Developed Hassle-Free by a Pro AI Developer. No Programming Skills or Blockchain Knowledge Required! We'll Craft the Code Step-by-Step, Explaining Every Move in Plain English. Don't Miss Out on Seamless Smart Contract Development!"
...more
$4.99
After purchasing, you will gain access to the prompt file which you can use with GPT or the app builder. You'll receive 20 free generation credits with this purchase. By purchasing this prompt, you agree to our terms of service.
Over 1 month ago
Prompt Details
Model
Chat - GPT-3.5 (gpt-3.5-turbo)
Token size
76 ($0.00020 / call)
Example input
Please provide me with the specific requirements for your contract, and I'll do my best to write the code and explain each step along the way.
Please provide the following details:
The purpose of the smart contract: What functionality or problem are you trying to solve with this contract?
The entities involved: Who are the participants or stakeholders in this contract?
The specific actions or operations you want the contract to enable: What are the tasks or interactions that the contract should handle?
Once I have these details, I'll be able to write the code for your smart contract and explain each step along the way in simple language.
INPUT:
1. Purpose: A simple crowdfunding smart contract where users can contribute funds towards a project, and once a funding goal is reached, the funds are transferred to the project owner.
2. Entities: We have two entities involved in this contract: the contributors who provide funds, and the project owner who receives the funds.
3. Actions: The contract should allow contributors to send funds, keep track of the total funds raised, and enable the project owner to withdraw the funds when the funding goal is met.
Example output
Thank you! The smart contract is:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract Crowdfunding {
address public projectOwner;
uint256 public fundingGoal;
uint256 public totalFundsRaised;
mapping(address => uint256) public contributions;
event FundsContributed(address indexed contributor, uint256 amount);
event FundsWithdrawn(address indexed projectOwner, uint256 amount);
constructor(uint256 _fundingGoal) {
projectOwner = msg.sender;
fundingGoal = _fundingGoal;
}
function contribute() external payable {
require(msg.value > 0, "Contribution must be greater than zero.");
contributions[msg.sender] += msg.value;
totalFundsRaised += msg.value;
emit FundsContributed(msg.sender, msg.value);
}
function withdrawFunds() external {
require(msg.sender == projectOwner, "Only the project owner can withdraw funds.");
require(totalFundsRaised >= fundingGoal, "Funding goal not reached yet.");
uint256 amount = address(this).balance;
(bool success, ) = projectOwner.call{value: amount}("");
require(success, "Failed to withdraw funds.");
emit FundsWithdrawn(projectOwner, amount);
}
}
Explanation of the code:
We start by defining the contract name, Crowdfunding, and the version of Solidity we're using.
The contract variables projectOwner, fundingGoal, and totalFundsRaised are declared. projectOwner stores the address of the project owner, fundingGoal represents the target funding amount, and totalFundsRaised keeps track of the cumulative funds contributed.
The contributions mapping is used to associate each contributor's address with their contribution amount.
We define two events: FundsContributed to log contributions made, and FundsWithdrawn to log successful withdrawals.
The constructor is invoked when the contract is deployed. It takes the fundingGoal as a parameter and sets the projectOwner as the deployer of the contract.
The contribute function allows contributors to send funds to the contract. It requires a non-zero contribution and updates the contributions mapping and totalFundsRaised. The FundsContributed event is emitted to track the contribution.
The withdrawFunds function is used by the project owner to withdraw the funds. It requires that the caller is the projectOwner and that the funding goal has been reached. The contract's balance is transferred to the project owner's address, and the FundsWithdrawn event is emitted.