Tatweer-Blockchain (ReportStorage Contract)

This is a simple Solidity smart contract for storing and retrieving reports on the Ethereum blockchain that we've integrated with our solution in Tatweer Event as we need a secure and publuc non changable place to store our reports. It allows users to add reports with a timestamp and content, and retrieve reports by their ID. The contract emits events whenever a report is added.

Hosted Contract

The contract is deployed at the following address:

• Contract Address: 0x98e9EF3E3EA80Dd570861201da4EA8B6C8871819

Features

• Add Report: Allows users to add a new report with a timestamp and content.
• Retrieve Report: Allows users to fetch a report's content and timestamp by providing the report's ID.
• Get Report Count: Allows users to fetch the total number of reports stored.
• Event Logging: The contract emits an event whenever a new report is added.

Contract Structure

Struct: Report

The Report struct stores the details of a report, including:

• timestamp: The time when the report was added (in Unix timestamp format).
• content: The textual content of the report.

Array: reports

An array of Report structs that holds all the stored reports.

Event: ReportAdded

This event is emitted when a new report is added. It contains the following parameters:

• id: The index of the newly added report in the reports array.
• timestamp: The timestamp when the report was added.
• content: The content of the newly added report.

Functions

addReport(string memory _content) public

Adds a new report with the specified content. The report's timestamp is automatically set to the current block timestamp. Emits the ReportAdded event.

• Input:
  • _content: The content of the report to be added (string).
• Output: None

getReport(uint256 _id) public view returns (uint256 timestamp, string memory content)

Retrieves the report by its ID. Returns the timestamp and content of the report.

• Input:
  • _id: The ID of the report to retrieve (uint256).
• Output:
  • timestamp: The timestamp when the report was created.
  • content: The content of the report.

getReportCount() public view returns (uint256)

Returns the total number of reports stored in the contract.

• Output:
  • The number of reports stored (uint256).

Deployment

Prerequisites

To deploy and interact with this contract, you will need:

• Node.js (v12 or above)
• Hardhat for development and deployment.
• MetaMask or any other Ethereum wallet to interact with the contract.

Setup

1. Install dependencies:

   npm install
   

2. Deploy the contract using Hardhat:

   npx hardhat run scripts/deploy.js --network <your_network>

3. After deployment, you can interact with the contract via Hardhat or a front-end interface.

Usage

Once deployed, you can call the contract's functions to add and retrieve reports.

Add a Report

To add a report, call the addReport function with the content:

await contract.addReport("Report Content");

Get a Report by ID

To get a report by its ID, call the getReport function:

const [timestamp, content] = await contract.getReport(0);
console.log("Timestamp:", timestamp);
console.log("Content:", content);

Get the Total Number of Reports

To get the number of reports stored:

const count = await contract.getReportCount();
console.log("Total Reports:", count);

License

This project is licensed under the MIT License - see the LICENSE file for details.