voting

[Raoshwill99]

Voting Smart Contract for Improved Maintainability

Description

The Voting System Smart Contract is designed to facilitate a simple and transparent voting process on a blockchain platform. The contract enables users to add candidates, cast votes, and determine election outcomes based on the highest number of votes. By leveraging the Clarity smart contract language, this system ensures clarity, efficiency, and immutability in the voting process.

Key Changes

• Modular Design: The contract is now divided into multiple modules for improved readability, maintainability, and scalability.
• Enhanced Error Handling: Improved error messages and handling to ensure better user experience and debugging.
• Efficient Data Management: Optimized data storage and retrieval mechanisms for better performance.

Modules Created

1. Main Contract: The primary contract file that imports and integrates various modules.
2. Storage: Manages data storage for candidates and votes.
3. Core Functions: Contains the core functionalities such as adding candidates and casting votes.
4. Distribution Functions: Handles vote distribution and winner determination.
5. Trait Definition: Defines traits for the contract to ensure compatibility and standardization.

Comments for Specific Changes

• Main Contract (main.clar): Integrates all modules and serves as the entry point for the contract.
• Storage (storage.clar): Centralized data storage logic to improve data management and access patterns.
• Core Functions (core.clar): Modularized core functionalities for better code organization and reuse.
• Distribution Functions (distribution.clar): Isolated vote distribution logic to enhance clarity and separation of concerns.
• Trait Definition (nok-trait.clar): Ensures the contract adheres to defined standards and traits for interoperability.

Main Contract (main.clar)

This is the entry point of the voting contract, integrating all the necessary modules.

;; title: Voting Main Contract

(use-trait nok-trait .nok-trait)

(impl-trait .nok-trait.nok-trait)

(begin
  (use-contract storage .storage)
  (use-contract core .core)
  (use-contract distribution .distribution)
)

Storage (storage.clar)

Manages data storage for candidates and votes.

;; title: Voting Storage

(define-data-var candidates (map uint (tuple (name (string-ascii 100)) (votes uint))))

(define-read-only (get-candidates)
  (ok (map-to-list (var-get candidates))))

(define-read-only (get-votes (candidate uint))
  (match (map-get (var-get candidates) candidate)
    ((some (tuple _ votes)) (ok votes))
    (none (err "Candidate not found"))))

Core Functions (core.clar)

Contains the core functionalities such as adding candidates and casting votes.

;; title: Voting Core Functions

(define-private (add-candidate (candidate uint) (name (string-ascii 100)))
  (if (map-contains? (var-get candidates) candidate)
    (err "Candidate already exists")
    (begin
      (map-set candidates candidate (tuple name 0))
      (ok "Candidate added"))))

(define-private (cast-vote (candidate uint))
  (match (map-get (var-get candidates) candidate)
    ((some (tuple name votes))
      (map-set candidates candidate (tuple name (+ votes 1)))
      (ok "Vote cast"))
    (none (err "Candidate not found"))))

Distribution Functions (distribution.clar)

Handles vote distribution and winner determination.

;; title: Voting Distribution Functions

(define-read-only (get-winner)
  (let ((winner (reduce-map (var-get candidates) (tuple uint 0) (lambda (k v acc)
    (if (> (tuple-get v 1) (tuple-get acc 1))
      (tuple k (tuple-get v 1))
      acc)))))
    (match winner
      ((tuple id _)) (ok id)
      _ (err "No candidates found"))))

(define-read-only (get-total-votes)
  (let ((total (reduce-map (var-get candidates) 0 (lambda (k v acc)
    (+ acc (tuple-get v 1))))))
    (ok total)))

Trait Definition (nok-trait.clar)

Defines traits for the contract to ensure compatibility and standardization.

;; title: Voting Trait Definition

(define-trait nok-trait
  (
    (get-candidates () (response (list (tuple (id uint) (name (string-ascii 100)) (votes uint))) uint))
    (get-votes (uint) (response uint (string-ascii 50)))
    (add-candidate (uint (string-ascii 100)) (response (string-ascii 50) (string-ascii 50)))
    (cast-vote (uint) (response (string-ascii 50) (string-ascii 50)))
    (get-winner () (response uint (string-ascii 50)))
    (get-total-votes () (response uint (string-ascii 50)))
  )
)