calendar-smart-contract

Solidity Smart Contract Template for Decentralized Meeting Scheduling and Management on Blockchain

👉 STAR ⭐ this project for later use and to keep posted on the changes.

Table of Contents

• Calendar Smart Contract
  • Table of Contents
  • General Information
  • Features
  • Function's
  • Technologies and Techniques
    • Project configuration
    • Main application
  • Setup

General Information

• This project was created to fulfill the need many developers face when building decentralized applications with on-chain meeting management functionality.
• It provides a Solidity smart contract template to create, manage, and track meetings, ensuring transparency and immutability on the blockchain.
• It simplifies the implementation of features like meeting creation, rescheduling, participant management, and availability checks, serving as a foundation for your blockchain-based scheduling applications.

Features

• Create a Meeting: Allows an organizer to create a meeting with participants, date, time, agenda, and link ✔
• Reschedule a Meeting: Organizer can reschedule the meeting by changing the date and time ✔
• Add Participants: Organizer can add participants to an existing meeting ✔
• Cancel a Meeting: Organizer can cancel the meeting ✔
• Check Meetings by Address: Retrieve all meetings for which a user is an organizer or participant ✔
• Check Availability: Checks if an address is available for a given date and time ✔

Function's

createMeeting

• Purpose: Allows an organizer to create a new meeting.
• Parameters:
  • participants: List of participants' addresses.
  • date: UNIX timestamp for the meeting date.
  • startTime: Start time of the meeting in seconds from midnight.
  • endTime: End time of the meeting in seconds from midnight.
  • agenda: A brief agenda of the meeting.
  • meetLink: Link to the meeting (e.g., Zoom/Google Meet link).
• Details:
  • Creates a new meeting and tracks it under the organizer and participants' addresses.
  • Emits the MeetingCreated event.

rescheduleMeeting

• Purpose: Enables the organizer to reschedule an existing meeting.
• Parameters:
  • meetingId: ID of the meeting to be rescheduled.
  • newDate: New date for the meeting.
  • newStartTime: New start time of the meeting.
  • newEndTime: New end time of the meeting.
• Details:
  • Updates the date and time of the specified meeting.
  • Emits the MeetingRescheduled event.

addParticipants

• Purpose: Allows the organizer to add new participants to an existing meeting.
• Parameters:
  • meetingId: ID of the meeting.
  • newParticipants: List of new participants' addresses.
• Details:
  • Adds only non-duplicate participants to the meeting.
  • Tracks the meeting under the new participants' addresses.
  • Emits the ParticipantAdded event for each added participant.

cancelMeeting

• Purpose: Lets the organizer cancel an existing meeting.
• Parameters:
  • meetingId: ID of the meeting to be canceled.
• Details:
  • Marks the meeting as canceled.
  • Emits the MeetingCancelled event.

getMeetingDetails

• Purpose: Retrieves detailed information about a specific meeting by its meetingId.
• Parameters:
  • meetingId: The unique identifier of the meeting to retrieve details for.
• Details:
  • A MeetingDetails object with the following fields:
  • organizer: Address of the meeting organizer.
  • date: Meeting date (UNIX timestamp).
  • startTime: Meeting start time (in seconds from midnight).
  • endTime: Meeting end time (in seconds from midnight).
  • agenda: The agenda of the meeting.
  • meetLink: Link to the meeting.
  • isCancelled: Boolean indicating if the meeting is cancelled.
  • participants: Array of addresses representing participants in the meeting.

addMeetingToUser

• Purpose: Associates a meeting with a user's address.
• Parameters:
  • user: Address of the user.
  • meetingId: ID of the meeting.
• Details:
  • Ensures no duplicate meetings are added to the user's list.

Technologies and Techniques

Project configuration

📦src
 ┣ 📂contracts  => Contains contract
 ┣ 📂scripts  => Scripts to deploy the contract.
 ┣ 📂test  => Tests of the contract.
 ┣ 📜hardhat.config.js  => Network details.

Main application

• Contract deployed here: Calendar
• Smart contract deployment and testing were carried out using the Hardhat framework, which provides a robust environment for building and deploying Ethereum-based applications.
• The project leverages JavaScript for script automation and interaction with the deployed contracts.
• Base Sepolia Explorer was used for contract verification and exploring the deployed contract.
• Doc's Referred
  • https://www.web3.university/tracks/create-a-smart-contract/deploy-your-first-smart-contract
  • https://hardhat.org/hardhat-runner/docs/guides/verifying

Setup

1. Clone this project by doing:

$ git clone https://github.com/sarvesh371/calendar-smart-contract.git

2. Go to the folder you've just cloned the code and execute:

$ npm install

3. Create a .env file in your project's container folder. The file should have the following variables with your own values:

API_URL="ALCHEMY_API_URL"
PRIVATE_KEY="METAMASK_PRIVATE_KEY"
BASESCAN_API_KEY="BASESCAN_API_KEY"

4. Compile the contract

$ npx hardhat compile

5. Deploy the contract

$ npx hardhat run scripts/deploy.js --network baseSepolia

6. Verify the contract

$ npx hardhat verify --network baseSepolia <DEPLOYED_CONTRACT_ADDRESS>

7. Run tests on hardhat local

$ npx hardhat test

8. Run tests on Base Sepolia

$ npx hardhat test --network baseSepolia