Technology Stack

Blockchain Technology Stack

Smart Contract Architecture

TrustLedgerLabs' smart contract suite is built on production-tested standards with institutional-grade security requirements. All contracts are written in Solidity, reviewed against the Ethereum Smart Contract Best Practices, and subject to mandatory external audit before any mainnet deployment.

Core Contract Suite

// TrustLedgerLabs — Asset Token Contract (Specification)
// ERC-1400: Security Token Standard

pragma solidity ^0.8.20;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract TLLAssetToken is ERC20, AccessControl, ReentrancyGuard {
    
    bytes32 public constant ISSUER_ROLE    = keccak256("ISSUER_ROLE");
    bytes32 public constant COMPLIANCE_ROLE = keccak256("COMPLIANCE_ROLE");
    bytes32 public constant OPERATOR_ROLE  = keccak256("OPERATOR_ROLE");

    // Asset metadata stored on IPFS
    string  public assetMetadataURI;
    uint256 public assetValuation;       // USD value (18 decimals, oracle-fed)
    uint256 public issuanceDate;
    uint256 public maturityDate;

    // Investor whitelist (KYC-verified addresses only)
    mapping(address => bool) private _whitelist;
    mapping(address => uint256) public investorTier; // 1=Retail, 2=Accredited, 3=Institutional

    // Transfer restrictions
    bool public transfersEnabled;
    uint256 public minHoldingPeriod; // Seconds — lock-up enforcement

    event InvestorWhitelisted(address indexed investor, uint256 tier);
    event AssetValuationUpdated(uint256 newValuation, uint256 timestamp);
    event YieldDistributed(uint256 totalAmount, uint256 perTokenAmount);

    modifier onlyWhitelisted(address account) {
        require(_whitelist[account], "TLL: Investor not KYC verified");
        _;
    }

    function transfer(address to, uint256 amount) 
        public override 
        onlyWhitelisted(to) 
        nonReentrant 
        returns (bool) 
    {
        require(transfersEnabled, "TLL: Transfers currently restricted");
        return super.transfer(to, amount);
    }

    function updateValuation(uint256 newValuation) 
        external 
        onlyRole(COMPLIANCE_ROLE) 
    {
        assetValuation = newValuation;
        emit AssetValuationUpdated(newValuation, block.timestamp);
    }
}

Audit Standards

Every smart contract deployed to mainnet by TrustLedgerLabs undergoes the following mandatory audit sequence:

1. Internal Code Review — peer review by minimum two senior Solidity engineers
2. Automated Analysis — Slither static analysis, Mythril symbolic execution, and Echidna fuzzing
3. External Audit — Round 1 — full audit by an independent smart contract security firm
4. Remediation Period — all critical and high findings resolved and re-reviewed
5. External Audit — Round 2 — verification audit confirming remediation effectiveness
6. Mainnet Deployment — with audit reports published publicly via IPFS

Oracle Infrastructure

Reliable, manipulation-resistant data feeds are foundational to the security and integrity of the TrustLedgerLabs RWA platform. The platform's oracle strategy uses Chainlink's decentralised oracle network as its primary data infrastructure, supplemented by proprietary AI-powered valuation models for asset classes where standardised oracle feeds do not exist.

Data Feed Categories

AI/ML Systems

TrustLedgerLabs' AI capabilities — built during the NexusAI phase and further developed for blockchain-specific applications — are integrated as a native intelligence layer within the platform architecture. The ML systems operate continuously, processing on-chain and off-chain data streams to maintain accurate, real-time intelligence on every asset and counterparty on the platform.

Zero-Trust Security Framework

Security Architecture Principles

• Principle of Least Privilege: Every system component and user role receives only the minimum permissions required for its function. No single key or address controls critical protocol functions.
• Multi-Signature Controls: All critical administrative actions (smart contract upgrades, treasury movements, parameter changes) require multi-signature approval from geographically distributed signers.
• Timelock Mechanisms: Protocol governance changes are subject to mandatory timelock periods (minimum 48 hours for standard; 7 days for critical) to allow community review and emergency response if malicious proposals are detected.
• Circuit Breakers: Automated circuit breakers pause platform operations if anomalous transaction patterns are detected — including sudden large withdrawals, abnormal price movements, or oracle data manipulation attempts.
• Penetration Testing: Quarterly penetration tests of the full application stack — including web interface, API layer, and smart contract interactions — conducted by independent security firms.
• Bug Bounty Programme: A structured bug bounty programme with competitive payouts for responsible disclosure of security vulnerabilities, running continuously post-launch.

DevOps & Infrastructure