[Contract] 📂 Pharmaceutical Supply Chain Tracker

[salazarsebas]

🎯 Objective

Create a complete smart contract for pharmaceutical-supply-chain-tracker that tracks the pharmaceutical supply chain on the Stellar network using Soroban, ensuring transparent and tamper-proof logging of drugs from manufacturer to patient while complying with supply chain traceability standards.

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🏗 Contract Structure

pharmaceutical-supply-chain-tracker/src/
  lib.rs                // Configuration and contract exports
  tracker.rs            // Core logic for supply chain event tracking
  stages.rs             // Management of supply chain stages and updates
  utils.rs              // Shared utilities for validation and timestamping
  Makefile              // Build and deployment automation
  README.md             // Contract documentation and usage instructions

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🗂 Requirements

1. Supply Chain Tracking

   • Implement mechanisms for logging supply chain events (e.g., manufacturing, distribution, delivery) compliant with standards like GS1 or DSCSA.
   • Support verification of drug authenticity and integrity at each stage.
   • Enable querying of supply chain history for transparency.

2. Pharmaceutical-Specific Features

   • Role-based updates: Only authorized entities (e.g., manufacturers, distributors, pharmacies) can log events.
   • Integration hooks for linking to vaccine distribution or clinical trial contracts.

3. Build and Test

   • Must successfully execute cargo build, stellar contract build, and cargo test.

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📦 Key Data Structures

The contract will use storage maps to associate pharmaceutical batch identifiers with arrays of supply chain events, each event capturing details like timestamp, location, responsible entity address, and event type (e.g., shipped, received). Additional mappings will store entity roles and batch verification statuses to facilitate quick integrity checks.

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🔑 Key Functions

• initialize() – Set up the contract with initial batch and role configurations.
• log_event() – Record a new supply chain event for a specific batch.
• verify_chain() – Verify the integrity and authenticity of a batch’s supply chain.
• get_history() – Retrieve the complete event history for a batch.
• assign_role() – Assign roles to addresses for updating the supply chain.

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🔗 References

• Soroban Documentation - Contract Development
• Stellar Developers - Data Management
• Rust Book - Structuring Data
• Soroban Storage Guide
• GS1 Standards for Supply Chain
• DSCSA Compliance Guidelines

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⏳ ETA

• 3 Days

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📌 Additional Notes

• Optimize storage to minimize transaction fees on Soroban for supply chain participants.
• Design for scalability to handle high volumes of pharmaceutical batches.
• Ensure tamper-proof logging to maintain trust in the supply chain.
• Support future integration with IoT devices for automated event logging.
• Include mechanisms for flagging anomalies, such as delays or unauthorized updates.

[big14way]

@salazarsebas assign this issue to me