Smart Contracts Creation and Management Guide

Overview

Our platform uses a sophisticated modular smart contract architecture built on the SEI Network. This guide covers how to create, manage, and interact with smart contracts for construction project management.

What are Smart Contracts?

Smart contracts are self-executing contracts with terms directly written into code. They automatically execute when predetermined conditions are met, ensuring trustless and transparent operations.

Key Benefits

• Automation: Payments and milestone releases happen automatically
• Transparency: All actions are recorded on the blockchain
• Security: Immutable and tamper-proof execution
• Cost Efficiency: Reduces need for intermediaries

Our Modular Architecture

Core Modules

Each project deploys multiple interconnected smart contracts:

1. ProjectCore - Main coordination and access control
2. PaymentManager - Financial operations and escrow
3. DocumentManager - Document storage and verification
4. SecurityManager - Security and fraud detection
5. ComplianceManager - Regulatory compliance
6. MilestoneManager - Progress tracking and validation

How Modules Work Together

graph TD
    A[ProjectCore] --> B[PaymentManager]
    A --> C[DocumentManager]
    A --> D[SecurityManager]
    A --> E[ComplianceManager]
    A --> F[MilestoneManager]
    B --> G[Automatic Payments]
    C --> H[Document Verification]
    F --> I[Progress Validation]

Creating Smart Contracts

Using the Contract Factory

The easiest way to create smart contracts is through our Contract Factory:

1. Access the Factory: Navigate to Contracts → Contract Factory
2. Fill Project Details: Provide project information
3. Set Participants: Add all project stakeholders
4. Configure Payments: Set milestone-based payment schedule
5. Deploy: Submit transaction to deploy all modules

Manual Creation (Advanced)

For advanced users, contracts can be deployed manually:

// Example: Manual contract deployment
const factory = new ethers.Contract(
    FACTORY_ADDRESS,
    FACTORY_ABI,
    signer
);

const tx = await factory.createProject({
    projectName: "Construction Project",
    totalValue: ethers.parseEther("1000"),
    participants: ["0x...", "0x..."],
    milestones: [25, 25, 25, 25] // Percentage splits
});

const receipt = await tx.wait();
console.log("Project deployed at:", receipt.logs[0].address);

Managing Smart Contracts

Contract Lifecycle

1. Initialization - Contract deployed with basic parameters
2. Configuration - Participants added, roles assigned
3. Active - Project running, milestones being tracked
4. Completion - Final payments released, contract finalized

Key Management Tasks

Adding Participants

await projectCore.addParticipant(
    participantAddress,
    ethers.id("CONTRACTOR_ROLE")
);

Managing Milestones

// Mark milestone as complete
await milestoneManager.completeMilestone(milestoneId);

// Trigger payment release
await paymentManager.releasePayment(milestoneId);

Document Management

// Upload and sign document
const docHash = await uploadToIPFS(documentFile);
await documentManager.addDocument(
    "Contract Amendment",
    docHash,
    "0x" + keccak256(documentFile)
);

Security Best Practices

Access Control

• Use role-based permissions
• Implement multi-signature requirements
• Regular permission audits

Transaction Safety

• Always verify transaction parameters
• Use appropriate gas limits
• Monitor for failed transactions

Emergency Procedures

• Contracts include pause functionality
• Emergency admin controls
• Upgrade mechanisms for critical fixes

Advanced Features

Upgradeability

Our contracts use OpenZeppelin's UUPS pattern for safe upgrades:

// Upgrade contract implementation
function upgradeTo(address newImplementation) external onlyRole(UPGRADER_ROLE) {
    _authorizeUpgrade(newImplementation);
    _upgradeTo(newImplementation);
}

Event Monitoring

Real-time event tracking for contract activities:

projectCore.on('MilestoneCompleted', (milestoneId, completedBy) => {
    console.log(`Milestone ${milestoneId} completed by ${completedBy}`);
    // Trigger UI updates
});

Integration with Platform

Contracts automatically sync with our platform database:

• Real-time status updates
• Transaction history tracking
• Automated notifications
• Reconciliation services

Troubleshooting

Common Issues

Transaction Failures

• Insufficient Gas: Increase gas limit
• Invalid Parameters: Check all inputs
• Permission Denied: Verify user roles

Contract Interaction Problems

• ABI Mismatch: Update contract ABI
• Network Issues: Check SEI network connection
• Outdated Contract: Verify contract addresses

Getting Help

• Technical Support: tech@contracting.app
• Documentation: See Contract Factory Guide
• Community: GitHub Discussions
• Security Issues: security@contracting.app

Best Practices Summary

1. Always test on testnet first
2. Use the Contract Factory for standard deployments
3. Implement proper access controls
4. Monitor contract events regularly
5. Keep contract addresses secure
6. Plan for upgrades and maintenance
7. Regular security audits
8. Backup critical contract data

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For more detailed information, see our Contract Factory Guide and Security Practices Guide.