Fix Smart Contract Logic, Enforce Stage Validation, and Refactor Backend to MVC #86
Description
Bug Description
🐛 Critical Smart Contract & Backend Refactor Required
📌 Problem Description
The current CropChain implementation contains multiple structural and logical issues across both the smart contract and backend layers:
- Smart contract contains syntax inconsistencies and incorrect parameter handling
- Inconsistent event emissions
- Weak stage transition validation
- Missing strict role-based authorization enforcement
- Backend architecture not fully aligned with MVC best practices
- Inconsistent validation and error response formatting
- Limited automated test coverage
- Potential stage-skipping vulnerabilities in supply chain flow
These issues reduce reliability and make future blockchain integration and persistent storage harder to maintain.
🎯 Objectives
- Fix smart contract logic flaws and syntax errors
- Strengthen supply chain stage validation
- Enforce strict role-based authorization
- Refactor backend into a clean MVC architecture
- Standardize API response handling
- Add comprehensive automated tests (contract + backend)
🏷 Difficulty Level
Medium → Hard
This task requires:
- Deep understanding of Solidity and smart contract architecture
- Backend restructuring using MVC principles
- Secure role-based authorization implementation
- Careful stage progression validation logic
- Cross-layer integration between contract and backend
- Writing and maintaining comprehensive automated tests
The refactor impacts multiple layers of the system, making it more complex than a typical bug fix.