📜 Stellara AI Smart Contracts (Soroban)

Soroban smart contracts powering Stellara AI, a Web3 crypto learning and social trading platform built on the Stellar blockchain. These contracts provide decentralized services for education credentials, social rewards, messaging, and on-chain trading used by the Stellara backend and frontend applications.

This repository is intended for blockchain developers, protocol contributors, and the Stellara platform infrastructure, serving as the trust layer for learning achievements, engagement rewards, user interactions, and decentralized trading features.

🆕 Upgradeability & Governance NEW: All contracts now feature explicit upgradeability with on-chain governance support.

✅ Multi-Signature Approval: Upgrades require M-of-N approvals (e.g., 2-of-3) ✅ Timelock Delays: Prevents immediate execution (configurable: 1-24+ hours) ✅ Role-Based Control: Admin, Approver, and Executor roles prevent single points of failure ✅ Transparent Governance: All proposals tracked on-chain and auditable ✅ Comprehensive Tests: 10+ test cases covering all upgrade scenarios

Documentation:

Upgradeability Design - Complete architecture & security analysis Governance User Guide - Step-by-step upgrade procedures Quick Reference - 30-second overview Implementation Summary - What was built Overview This repository contains four core smart contracts that power the Stellara ecosystem:

Trading Contract (✨ Now Upgradeable): Decentralized exchange functionality for trading cryptocurrency pairs Academy Contract: Credential management for course completion and learning achievements Social Rewards Contract: Engagement tracking and reward distribution for community participation Messaging Contract: Decentralized messaging between users with read status tracking Project Structure ├── contracts/ │ ├── trading/ # ✨ Upgradeable DEX trading contract │ ├── academy/ # ✨ NEW: Academy vesting & rewards contract │ │ ├── VESTING_DESIGN.md # Vesting architecture & design │ │ ├── VESTING_QUICK_REFERENCE.md # Quick reference guide │ │ ├── INTEGRATION_GUIDE.md # Backend/frontend integration │ │ ├── DELIVERY_SUMMARY.md # Project completion summary │ │ └── README.md # Academy contract overview │ ├── social_rewards/ # Engagement rewards contract │ └── messaging/ # P2P messaging contract ├── shared/ # ✨ NEW: Shared governance module (reusable) │ └── src/governance.rs # Multi-sig upgrade governance ├── Cargo.toml # Workspace configuration ├── UPGRADEABILITY.md # Upgradeability design documentation ├── GOVERNANCE_GUIDE.md # Step-by-step governance procedures ├── QUICK_REFERENCE.md # Quick reference card └── README.md # This file Prerequisites Rust 1.70 or later Soroban SDK 20.5.0 Stellar CLI tools Building

Build all contracts

cargo build --release --target wasm32-unknown-unknown

Build specific contract

cd contracts/trading cargo build --release --target wasm32-unknown-unknown Testing

Run all tests (including new governance tests)

cargo test --all

Run specific contract tests

cd contracts/trading cargo test # Includes 10+ upgradeability tests Governance & Upgradeability Quick Start All contracts now support governance-controlled upgrades:

1. Initialize with governance roles

stellar contract invoke --id $CONTRACT_ID --source admin --
init --admin $ADMIN --approvers [$A1,$A2,$A3] --executor $EXECUTOR

2. Propose an upgrade

stellar contract invoke --id $CONTRACT_ID --source admin --
propose_upgrade --new_contract_hash $HASH --description "..."
--approvers [$A1,$A2,$A3] --approval_threshold 2 --timelock_delay 3600

3. Approvers vote (need 2 of 3)

stellar contract invoke --id $CONTRACT_ID --source $APPROVER1 --
approve_upgrade --proposal_id 1

4. Wait for timelock, then execute

stellar contract invoke --id $CONTRACT_ID --source $EXECUTOR --
execute_upgrade --proposal_id 1 Governance Features ✅ Multi-Sig Approval (M-of-N): e.g., 2-of-3 signers required ✅ Timelock Delays: Safety period (1-24+ hours) before execution ✅ Role-Based Control: Admin, Approver, Executor roles ✅ Transparent: All proposals on-chain and queryable ✅ Circuit Breakers: Rejection and cancellation mechanisms Documentation UPGRADEABILITY.md: 10+ sections covering:

Architecture with diagrams Security safeguards explained Complete governance process flow Smart contract implementation details Testing & validation strategy GOVERNANCE_GUIDE.md: Practical guide with:

Step-by-step CLI examples Multi-signature approval workflow Timelock management Error handling & troubleshooting Emergency procedures QUICK_REFERENCE.md: Cheat sheet with:

30-second overview Function reference Common scenarios Error codes Deployment Testnet Deployment Set up your Stellar CLI: stellar config network set testnet https://soroban-testnet.stellar.org Create a network configuration: stellar config set --scope global RPC_URL https://soroban-testnet.stellar.org stellar config set --scope global NETWORK_PASSPHRASE "Test SDF Network ; September 2015" Deploy contracts:

Build WASM binaries

cargo build --release --target wasm32-unknown-unknown

Deploy trading contract

stellar contract deploy
--wasm target/wasm32-unknown-unknown/release/trading_contract.wasm
--source account-name
--network testnet Initialize contracts after deployment:

Initialize trading contract with governance

stellar contract invoke
--id CONTRACT_ADDRESS
--source account-name
--network testnet
-- init
--admin "$ADMIN_ADDRESS"
--approvers '["$APPROVER1", "$APPROVER2", "$APPROVER3"]'
--executor "$EXECUTOR_ADDRESS" Contract Descriptions Trading Contract ✨ (Upgradeable) Manages decentralized trading operations with governance support.

Key Functions:

init(): Initialize with governance roles trade(): Execute a trade on specified pair with fee collection get_stats(): Retrieve trading statistics propose_upgrade(): Propose contract upgrade approve_upgrade(): Approve pending upgrade execute_upgrade(): Execute approved upgrade pause() / unpause(): Emergency pause functionality Governance Functions:

propose_upgrade(): Create upgrade proposal (Admin) approve_upgrade(): Approve proposal (Approver) reject_upgrade(): Reject proposal (Approver) execute_upgrade(): Execute approved upgrade (Executor) cancel_upgrade(): Cancel proposal (Admin) Academy Contract (✨ NEW: Vesting & Rewards) Manages educational credentials, achievements, and secure vesting of academy rewards.

Two Core Features:

Vesting Module (NEW) - Time-based vesting of tokens/badges

grant_vesting(): Create vesting schedule (admin only) claim(): Atomic claim of vested tokens (single-claim semantics) revoke(): Revoke grant with timelock protection get_vesting(): Query vesting schedule get_vested_amount(): Calculate current vested amount Credentials - Educational achievements

issue_credential(): Award credential to user (admin only) get_user_credentials(): Retrieve user's credentials verify_credential(): Verify a credential exists Vesting Features:

✅ Time-based vesting with cliff periods ✅ Linear vesting after cliff ✅ Single-claim semantics (prevents double-spend) ✅ Governance revocation with 1+ hour timelock ✅ Event emission for off-chain indexing ✅ 18+ comprehensive tests Documentation:

VESTING_DESIGN.md - Complete technical design VESTING_QUICK_REFERENCE.md - Quick start INTEGRATION_GUIDE.md - Integration examples README.md - Academy contract overview Social Rewards Contract Tracks engagement and distributes rewards.

Key Functions:

init(): Initialize the contract record_engagement(): Record user engagement activity get_user_rewards(): Get user's reward balance and tier get_engagement_history(): Get user's engagement history claim_tier_reward(): Claim rewards based on tier Messaging Contract Enables decentralized P2P messaging.

Key Functions:

init(): Initialize the contract send_message(): Send message to recipient mark_as_read(): Mark message as read get_messages(): Get user's messages (received/sent) get_unread_count(): Get count of unread messages get_stats(): Retrieve messaging statistics Environment Variables For deployment, set these environment variables:

Stellar account secret key

export STELLAR_SECRET_KEY="your-secret-key"

Network configuration (testnet by default)

export SOROBAN_NETWORK="testnet" export SOROBAN_RPC_URL="https://soroban-testnet.stellar.org"

Governance configuration

export ADMIN_ADDRESS="G..." export APPROVER_1="G..." export APPROVER_2="G..." export APPROVER_3="G..." export EXECUTOR_ADDRESS="G..." Security Considerations ✅ All contracts implement authentication via require_auth() ✅ Admin functions protected with role verification ✅ Contract storage uses instance storage for state management ✅ NEW: Upgradeable via multi-sig governance (prevents rogue upgrades) ✅ NEW: Timelock delays provide reaction window (1-24+ hours) ✅ NEW: Transparent proposal system (all changes auditable) Ecosystem Repositories 🌐 Frontend (Next.js): https://github.com/Dev-shamoo/Stellara_Ai ⚙ Backend (NestJS): https://github.com/shamoo53/Stellara_Ai_backend ⭐ Stellar Docs: https://developers.stellar.org/docs/smart-contracts/soroban/

Contributing 🤝 Contributing:

Fork the repository Create a feature branch Submit a pull request Please ensure all tests pass and documentation is updated with your changes.

Last Updated: January 22, 2026 Version: 2.0 (with Upgradeability & Governance) Status: Production Ready Commit your changes git pull latest changes to avoid conflicts Submit a pull request Issues and feature requests are welcome.

When adding new features:

Create a new function in the appropriate contract Add corresponding tests Update this README with new function documentation Ensure all tests pass before submitting