// SPDX-License-Identifier: MITpragma solidity ^0.8.19;/** * @title Financial Knowledge Token (FKT) * @author Widi Prihartanadi System * @dev ERC-1155 Multi-Token Standard dengan integrasi AI Oracle */import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";import "@openzeppelin/contracts/access/Ownable.sol";import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";contract FKT is ERC1155, Ownable {    // === DATA STRUCTURES ===    struct KnowledgeAsset {        uint256 id;        string title;        string ipfsHash;        uint256 timestamp;        address creator;        uint256 accessPrice; // dalam JKK Utility Token        bool isCertified;    }        // === STATE VARIABLES ===    mapping(uint256 => KnowledgeAsset) public assets;    mapping(address => mapping(uint256 => uint256)) public accessRecords;    uint256 public assetCount;        // AI Oracle Address (Chainlink)    address public aiOracle;        // === EVENTS ===    event AssetMinted(uint256 indexed id, address indexed creator, string ipfsHash);    event AssetAccessed(uint256 indexed id, address indexed user, uint256 price);    event AICertification(uint256 indexed id, bool certified, string proofHash);        // === CONSTRUCTOR ===    constructor(string memory uri) ERC1155(uri) Ownable(msg.sender) {        assetCount = 0;        aiOracle = 0x5FbDB2315678afecb367f032d93F642f64180aa3; // Testnet address    }        // === CORE FUNCTIONS ===    function mintKnowledgeAsset(        string memory title,        string memory ipfsHash,        uint256 accessPrice    ) external returns (uint256) {        assetCount++;        uint256 newAssetId = assetCount;                assets[newAssetId] = KnowledgeAsset({            id: newAssetId,            title: title,            ipfsHash: ipfsHash,            timestamp: block.timestamp,            creator: msg.sender,            accessPrice: accessPrice,            isCertified: false        });                _mint(msg.sender, newAssetId, 1, "");        emit AssetMinted(newAssetId, msg.sender, ipfsHash);                // Trigger AI certification process        _requestAICertification(newAssetId, ipfsHash);                return newAssetId;    }        function accessAsset(uint256 assetId) external payable {        require(assets[assetId].id != 0, "Asset tidak ditemukan");        require(msg.value >= assets[assetId].accessPrice, "Pembayaran tidak cukup");                // Transfer payment to creator        payable(assets[assetId].creator).transfer(msg.value);                // Record access        accessRecords[msg.sender][assetId] = block.timestamp;                // Mint access token to user (ERC-1155 dengan ID berbeda)        uint256 accessTokenId = assetId * 1000000; // Encoding khusus        _mint(msg.sender, accessTokenId, 1, "");                emit AssetAccessed(assetId, msg.sender, msg.value);    }        // === AI INTEGRATION ===    function _requestAICertification(uint256 assetId, string memory ipfsHash) internal {        // Interaksi dengan AI Oracle (simulasi)        // Dalam implementasi nyata: Chainlink Any API → AI Verification Service        bool isCertified = _simulateAIVerification(ipfsHash);                assets[assetId].isCertified = isCertified;                string memory proofHash = string(abi.encodePacked(            "AI_VERIFIED_",            Strings.toString(block.timestamp),            "_",            Strings.toHexString(uint256(keccak256(abi.encodePacked(ipfsHash))), 32)        ));                emit AICertification(assetId, isCertified, proofHash);    }        function _simulateAIVerification(string memory ipfsHash) internal pure returns (bool) {        // Simulasi: AI memverifikasi konten di IPFS        // Return true jika hash valid (dummy logic)        return bytes(ipfsHash).length > 0 && keccak256(bytes(ipfsHash)) != keccak256(bytes(""));    }        // === UTILITY FUNCTIONS ===    function getAssetDetails(uint256 assetId) external view returns (        string memory title,        string memory ipfsHash,        uint256 timestamp,        address creator,        uint256 accessPrice,        bool isCertified,        uint256 totalAccess    ) {        KnowledgeAsset memory asset = assets[assetId];        return (            asset.title,            asset.ipfsHash,            asset.timestamp,            asset.creator,            asset.accessPrice,            asset.isCertified,            balanceOf(asset.creator, assetId)        );    }        // Update AI Oracle (hanya owner)    function updateAIOracle(address newOracle) external onlyOwner {        aiOracle = newOracle;    }}

# Verifikasi via Ethereumcurl -X GET "https://api.etherscan.io/api?module=proxy&action=eth_getTransactionByHash&txhash=0x1f2e3d4c5b6a7989a0b1c2d3e4f5a6b7c8d9e0f&apikey=YOUR_API_KEY"# Verifikasi via IPFSipfs cat QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1mXWo6uco/widi_master_archive_v1.0.pdf

-- ============================================-- POSTGRESQL SCHEMA: JKK CORE DATABASE-- ============================================-- Tabel 1: Client Master Data (Off-chain, encrypted)CREATE TABLE clients (    client_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),    company_name VARCHAR(255) NOT NULL,    industry_type VARCHAR(100),    blockchain_address VARCHAR(42) UNIQUE,    encrypted_data BYTEA, -- PGP encrypted sensitive data    created_at TIMESTAMP DEFAULT NOW(),    updated_at TIMESTAMP DEFAULT NOW());-- Tabel 2: Financial Transactions (Hybrid storage)CREATE TABLE transactions (    transaction_id BIGSERIAL PRIMARY KEY,    client_id UUID REFERENCES clients(client_id),    amount DECIMAL(18,2) NOT NULL,    currency VARCHAR(3) DEFAULT 'IDR',    transaction_type VARCHAR(50), -- invoice, payment, etc    blockchain_tx_hash VARCHAR(66), -- Ethereum hash length    ipfs_cid VARCHAR(100), -- IPFS content identifier    ai_verification_score DECIMAL(5,4), -- AI confidence score 0-1    status VARCHAR(20) DEFAULT 'pending',    created_at TIMESTAMP DEFAULT NOW(),        -- Index for performance    INDEX idx_client_status (client_id, status),    INDEX idx_blockchain_hash (blockchain_tx_hash));-- Tabel 3: AI Audit LogsCREATE TABLE ai_audit_logs (    log_id BIGSERIAL PRIMARY KEY,    model_name VARCHAR(100),    input_hash VARCHAR(64), -- SHA-256 of input    output_result JSONB,    confidence_score DECIMAL(5,4),    processing_time_ms INTEGER,    blockchain_proof VARCHAR(66), -- Merkle root of batch logs    created_at TIMESTAMP DEFAULT NOW());-- Tabel 4: Knowledge Assets (Linked to FKT Smart Contract)CREATE TABLE knowledge_assets (    asset_id INTEGER PRIMARY KEY,    smart_contract_address VARCHAR(42),    token_id INTEGER,    title VARCHAR(500),    description TEXT,    ipfs_hash VARCHAR(100),    access_price_eth DECIMAL(18,9),    creator_address VARCHAR(42),    is_certified BOOLEAN DEFAULT FALSE,    certification_date TIMESTAMP,    total_access INTEGER DEFAULT 0,        FOREIGN KEY (smart_contract_address) REFERENCES smart_contracts(address));-- Tabel 5: Smart Contract RegistryCREATE TABLE smart_contracts (    address VARCHAR(42) PRIMARY KEY,    contract_name VARCHAR(100),    network VARCHAR(50), -- ethereum, polygon, ton    abi JSONB,    deployer_address VARCHAR(42),    deployment_date TIMESTAMP,    last_verified_block INTEGER DEFAULT 0);