// xNFT (Executable NFT) Implementation with dist_agent_lang
// Advanced NFT system with executable capabilities, dynamic metadata, and real-world asset integration
@trust("hybrid")
@chain("ethereum")
@secure
@ai
service xNFTSystem {
// Core NFT storage and management
nft_registry: Map<String, xNFT>;
execution_engine: any;
oracle_feeds: Map<String, any>;
ai_orchestrator: any;
// Multi-chain support
supported_chains: list;
cross_chain_bridge: any;
fn initialize() -> Result<Unit, Error> {
log::info("xnft", {
"service": "xNFTSystem",
"status": "initializing",
"timestamp": chain::get_block_timestamp()
});
// Initialize supported chains
self.supported_chains = ["ethereum", "polygon", "bsc", "arbitrum"];
// Setup NFT registry
self.nft_registry = Map::new();
// Initialize execution engine for xNFT logic
self.execution_engine = this.setup_execution_engine();
// Setup oracle feeds for dynamic data
self.oracle_feeds = this.setup_oracle_feeds();
// Initialize AI orchestrator for intelligent NFT behavior
self.ai_orchestrator = ai::create_orchestrator({
"model": "nft_intelligence",
"capabilities": ["dynamic_updates", "predictive_analytics", "autonomous_actions"],
"real_time_processing": true
});
// Setup cross-chain bridge for multi-chain NFTs
self.cross_chain_bridge = chain::create_multi_chain_bridge({
"chains": self.supported_chains,
"auto_sync": true,
"conflict_resolution": "latest_wins"
});
// Initialize database schema
self.setup_nft_database();
log::info("xnft", {
"service": "xNFTSystem",
"status": "initialized",
"chains": self.supported_chains.length(),
"oracle_feeds": self.oracle_feeds.size(),
"execution_engine": "ready"
});
return Ok(Unit);
}
fn setup_execution_engine() -> ExecutionEngine {
return {
"runtime": Runtime::new(),
"max_execution_time": 30000, // 30 seconds
"memory_limit": 100 * 1024 * 1024, // 100MB
"allowed_functions": [
"update_metadata", "trigger_action", "calculate_value",
"interact_with_oracle", "cross_chain_call", "ai_prediction"
],
"security_sandbox": true
};
}
fn setup_oracle_feeds() -> Map<String, any> {
return {
"price_feeds": oracle::create_multi_source_feed({
"sources": ["chainlink", "uniswap", "coinbase", "binance"],
"assets": ["ETH", "BTC", "MATIC", "BNB"],
"update_interval": 30000 // 30 seconds
}),
"weather_data": oracle::create_weather_feed({
"provider": "open_weather",
"locations": ["global"],
"metrics": ["temperature", "humidity", "wind_speed"]
}),
"social_sentiment": oracle::create_social_feed({
"platforms": ["twitter", "reddit", "discord"],
"topics": ["crypto", "nft", "defi"],
"sentiment_analysis": true
}),
"iot_sensors": oracle::create_iot_feed({
"device_types": ["temperature", "motion", "environmental"],
"real_time_updates": true
})
};
}
fn setup_nft_database() -> Result<Unit, Error> {
let schema_sql = "CREATE TABLE xnfts, nft_events, oracle_data with indexes";
// let schema_sql = "
// CREATE TABLE IF NOT EXISTS xnfts (
// id SERIAL PRIMARY KEY,
// token_id VARCHAR(255) UNIQUE NOT NULL,
// contract_address VARCHAR(255) NOT NULL,
// chain VARCHAR(50) NOT NULL,
// owner_address VARCHAR(255) NOT NULL,
// metadata JSONB,
// executable_code TEXT,
// execution_state JSONB,
// dynamic_properties JSONB,
// created_at TIMESTAMP DEFAULT NOW(),
// updated_at TIMESTAMP DEFAULT NOW(),
// last_executed TIMESTAMP,
// execution_count INTEGER DEFAULT 0
// );
//
// CREATE TABLE IF NOT EXISTS nft_events (
// id SERIAL PRIMARY KEY,
// nft_id INTEGER REFERENCES xnfts(id),
// event_type VARCHAR(100) NOT NULL,
// event_data JSONB,
// triggered_by VARCHAR(255),
// executed_at TIMESTAMP DEFAULT NOW(),
// transaction_hash VARCHAR(255),
// gas_used BIGINT
// );
//
// CREATE TABLE IF NOT EXISTS oracle_data (
// id SERIAL PRIMARY KEY,
// feed_type VARCHAR(100) NOT NULL,
// data_key VARCHAR(255) NOT NULL,
// data_value JSONB,
// confidence_score NUMERIC,
// source VARCHAR(100),
// fetched_at TIMESTAMP DEFAULT NOW()
// );
//
// CREATE INDEX idx_xnfts_token_id ON xnfts(token_id);
// CREATE INDEX idx_xnfts_owner ON xnfts(owner_address);
// CREATE INDEX idx_xnfts_chain ON xnfts(chain);
// CREATE INDEX idx_nft_events_nft_id ON nft_events(nft_id);
// CREATE INDEX idx_nft_events_type ON nft_events(event_type);
// CREATE INDEX idx_oracle_data_feed ON oracle_data(feed_type, data_key);
// ";
database::execute_query(self.database, schema_sql);
return Ok(Unit);
}
// ================================================
// xNFT CREATION AND MANAGEMENT
// ================================================
fn create_xnft(owner_address: String, nft_config: xNFTConfig) -> Result<xNFT, Error> {
// Generate unique token ID
let token_id = this.generate_unique_token_id(nft_config.collection);
// Validate executable code
let validation = this.validate_executable_code(nft_config.executable_code);
if (!validation.valid ) {
return Err(Error::new("CodeValidationError", validation.errors.join(", ")));
}
// Create NFT metadata
let metadata = this.create_nft_metadata(nft_config, token_id);
// Deploy NFT to blockchain
let deployment = this.deploy_nft_to_blockchain(metadata, nft_config.chain);
// Store xNFT in registry and database
let xnft = {
"id": token_id,
"contract_address": deployment.contract_address,
"chain": nft_config.chain,
"owner_address": owner_address,
"metadata": metadata,
"executable_code": nft_config.executable_code,
"execution_state": {
"last_executed": null,
"execution_count": 0,
"energy_level": 100,
"cooldown_until": null
},
"dynamic_properties": nft_config.dynamic_properties /* closure */,
"created_at": chain::get_block_timestamp(),
// "ai_enabled": nft_config.ai_enabled
};
// Store in memory registry
self.nft_registry[token_id] = xnft;
// Store in database
database::execute_query(self.database, "
INSERT INTO xnfts (
token_id, contract_address, chain, owner_address,
metadata, executable_code, execution_state, dynamic_properties
) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
", [
token_id, deployment.contract_address, nft_config.chain, owner_address,
json::stringify(metadata), nft_config.executable_code,
json::stringify(xnft.execution_state), json::stringify(xnft.dynamic_properties)
]);
// Setup real-time monitoring if (AI-enabled
if (xnft.ai_enabled ) {
this.setup_ai_monitoring(xnft);
}
log::info("xnft", {
"event": "xnft_created",
"token_id": token_id,
"owner": owner_address,
"chain": nft_config.chain,
"ai_enabled": xnft.ai_enabled
});
return Ok({ "value": xnft });
}
fn execute_xnft_logic(token_id: String, trigger_event: any) -> Result<ExecutionResult, Error> {
// Get xNFT from registry
let xnft = self.nft_registry.get(token_id);
if (xnft == null ) {
return Err(Error::new("NFTNotFound", "not found"));
}
// Check execution constraints
let constraints_check = this.check_execution_constraints(xnft);
if (!constraints_check.allowed ) {
return Err(Error::new("ExecutionBlocked", constraints_check.reason));
}
// Prepare execution context
let ai_insights = null;
if (xnft.ai_enabled == true) {
ai_insights = ai::get_nft_insights(self.ai_orchestrator, xnft);
}
let execution_context = {
"nft": xnft,
"trigger_event": trigger_event,
"oracle_data": this.get_relevant_oracle_data(xnft),
"blockchain_state": this.get_blockchain_state(xnft),
"ai_insights": ai_insights,
"timestamp": chain::get_block_timestamp()
};
// Execute the NFT's logic
let execution_result = this.execute_nft_code(xnft.executable_code, execution_context);
// Update NFT state based on execution
this.update_nft_state(xnft, execution_result);
// Record execution event
this.record_execution_event(xnft, trigger_event, execution_result);
// Trigger any follow-up actions
this.handle_execution_side_effects(xnft, execution_result);
log::info("xnft", {
"event": "xnft_executed",
"token_id": token_id,
"execution_time": execution_result.execution_time,
"actions_taken": execution_result.actions.length(),
"gas_used": execution_result.gas_used
});
return Ok(execution_result);
}
fn execute_nft_code(code: String, context: any) -> ExecutionResult {
// Create isolated execution environment
let execution_env = this.create_execution_environment(context);
// Execute code in sandbox (synchronous; timeout enforced by execution_engine config)
let start_time = chain::get_block_timestamp();
let run_result = this.run_nft_code_sandbox(code, execution_env);
let end_time = chain::get_block_timestamp();
let execution_time = end_time - start_time;
// Check timeout
let max_time = this.execution_engine.max_execution_time;
if (execution_time > max_time) {
return {
"success": false,
"result": null,
"actions": [],
"state_changes": {},
"oracle_queries": [],
"gas_used": 0,
"execution_time": execution_time,
"ai_decisions": []
};
}
return {
"success": run_result["success"],
"result": run_result["result"],
"actions": run_result["actions"],
"state_changes": run_result["state_changes"],
"oracle_queries": run_result["oracle_queries"],
"gas_used": run_result["gas_used"],
"execution_time": execution_time,
"ai_decisions": run_result["ai_decisions"]
};
}
fn run_nft_code_sandbox(code: String, execution_env: any) -> any {
// Sandboxed execution placeholder: in production would run code in isolated runtime
return {
"success": true,
"result": null,
"actions": [],
"state_changes": {},
"oracle_queries": [],
"gas_used": 0,
"ai_decisions": []
};
}
// ================================================
// DYNAMIC NFT FEATURES
// ================================================
fn update_dynamic_metadata(token_id: String, update_type: String, update_data: any) -> Result<UpdateResult, Error> {
let xnft = self.nft_registry.get(token_id);
if (xnft == null ) {
return Err(Error::new("NFTNotFound", "not found"));
}
// Determine update mechanism based on type
let update_mechanism = this.select_update_mechanism(update_type, update_data);
// Execute update
let update_result = update_mechanism.execute(xnft, update_data);
// Validate update doesn't violate NFT constraints
let validation = this.validate_metadata_update(xnft, update_result.new_metadata);
if (!validation.valid ) {
return Err(Error::new("UpdateValidationError", validation.errors.join(", ")));
}
// Update on blockchain if (required
if (update_result.requires_blockchain_update ) {
let blockchain_update = this.update_nft_on_blockchain(xnft, update_result.new_metadata);
update_result.blockchain_tx = blockchain_update.transaction_hash;
}
// Update in registry and database
xnft.metadata = update_result.new_metadata;
xnft.updated_at = chain::get_block_timestamp();
// Merge dynamic properties manually (DAL doesn't support spread operator)
let merged_properties = xnft.dynamic_properties;
let property_changes = update_result.property_changes;
// In production, iterate over property_changes keys and merge into merged_properties
xnft.dynamic_properties = merged_properties;
// Persist to database
database::execute_query(self.database, "
UPDATE xnfts
SET metadata = $1, dynamic_properties = $2, updated_at = $3
WHERE token_id = $4
", [
json::stringify(xnft.metadata),
json::stringify(xnft.dynamic_properties),
xnft.updated_at,
token_id
]);
// Record update event
this.record_update_event(xnft, update_type, update_result);
// Notify subscribers
this.notify_metadata_update(xnft, update_result);
return Ok(update_result);
}
fn select_update_mechanism(update_type: String, update_data: any) -> UpdateMechanism {
if (update_type == "oracle_triggered") {
return {
"type": "oracle_driven",
"execute": this.oracle_driven_update,
"requires_blockchain_update": true
};
} else if (update_type == "time_based") {
return {
"type": "scheduled",
"execute": this.time_based_update,
"requires_blockchain_update": false
};
} else if (update_type == "user_interaction") {
return {
"type": "interactive",
"execute": this.user_interaction_update,
"requires_blockchain_update": true
};
} else if (update_type == "ai_prediction") {
return {
"type": "ai_driven",
"execute": this.ai_driven_update,
"requires_blockchain_update": true
};
} else {
return {
"type": "manual",
"execute": this.manual_update,
"requires_blockchain_update": false
};
}
}
// ================================================
// DYNAMIC RWA (Real World Asset) FEATURES
// ================================================
fn create_dynamic_rwa(asset_config: RWAConfig) -> Result<DynamicRWA, Error> {
// Validate asset configuration
let validation = this.validate_rwa_config(asset_config);
if (!validation.valid ) {
return Err(Error::new("RWAValidationError", validation.errors.join(", ")));
}
// Setup real-world data feeds
let data_feeds = this.setup_rwa_data_feeds(asset_config);
// Create dynamic NFT representing the RWA
let nft_config = {
"name": asset_config.name,
"description": asset_config.description,
"collection": "dynamic_rwa",
"chain": asset_config.preferred_chain,
"executable_code": this.generate_rwa_executable_code(asset_config),
"dynamic_properties": {
"asset_type": asset_config.asset_type,
"valuation_method": asset_config.valuation_method,
"data_feeds": data_feeds,
"oracle_sources": asset_config.oracle_sources,
"update_frequency": asset_config.update_frequency,
"risk_parameters": asset_config.risk_parameters
},
"ai_enabled": true
};
// Create the xNFT
let xnft = this.create_xnft(asset_config.owner_address, nft_config);
// Setup RWA-specific monitoring
let rwa_monitoring = this.setup_rwa_monitoring(xnft, asset_config);
let dynamic_rwa = {
"nft": xnft,
"asset_config": asset_config,
"data_feeds": data_feeds,
"monitoring": rwa_monitoring,
"valuation_history": [],
"risk_assessment": this.initial_risk_assessment(asset_config),
"compliance_status": this.check_regulatory_compliance(asset_config)
};
log::info("xnft", {
"event": "dynamic_rwa_created",
"asset_type": asset_config.asset_type,
"token_id": xnft.id,
"valuation_method": asset_config.valuation_method
});
return Ok(dynamic_rwa);
}
fn update_rwa_valuation(token_id: String) -> Result<ValuationUpdate, Error> {
let xnft = self.nft_registry.get(token_id);
if (xnft == null ) {
return Err(Error::new("RWANotFound", "Dynamic RWA not found"));
}
// Gather current market data
let market_data = this.gather_market_data(xnft.dynamic_properties.oracle_sources);
// Calculate new valuation
let valuation = this.calculate_rwa_valuation(
xnft.dynamic_properties.asset_type,
xnft.dynamic_properties.valuation_method,
market_data
);
// Apply risk adjustments
let risk_adjusted_valuation = this.apply_risk_adjustments(valuation, xnft.dynamic_properties.risk_parameters);
// Update NFT metadata
let update_data = {
"valuation": risk_adjusted_valuation.value,
"confidence_score": risk_adjusted_valuation.confidence,
"last_valuation_update": chain::get_block_timestamp(),
"market_data_sources": market_data.sources_used
};
let update_result = this.update_dynamic_metadata(token_id, "rwa_valuation", update_data);
// Store valuation history
this.store_valuation_history(token_id, risk_adjusted_valuation);
// Check for significant value changes
let significant_change = this.detect_significant_change(xnft, risk_adjusted_valuation);
if (significant_change.detected ) {
this.handle_significant_value_change(xnft, significant_change);
}
return Ok({
"previous_valuation": xnft.dynamic_properties.valuation,
"new_valuation": risk_adjusted_valuation.value,
"change_percentage": this.calculate_percentage_change(
xnft.dynamic_properties.valuation,
risk_adjusted_valuation.value
),
"confidence_score": risk_adjusted_valuation.confidence,
"market_data_used": market_data.sources_used,
"blockchain_updated": update_result.blockchain_tx != null
});
}
// ================================================
// AI-POWERED DYNAMIC FEATURES
// ================================================
fn setup_ai_monitoring(xnft: xNFT) -> AIMonitoring {
let ai_config = {
"nft_id": xnft.id,
"monitoring_type": "comprehensive",
"alerts_enabled": true,
"predictive_analytics": true,
"anomaly_detection": true,
"trend_analysis": true
};
// Setup AI monitoring tasks
let monitoring_tasks = [
this.create_price_prediction_task(xnft),
this.create_risk_assessment_task(xnft),
this.create_market_sentiment_task(xnft),
this.create_liquidity_analysis_task(xnft)
];
return {
"config": ai_config,
"tasks": monitoring_tasks,
"alert_thresholds": this.calculate_alert_thresholds(xnft),
"prediction_models": this.initialize_prediction_models(xnft),
"active": true
};
}
fn create_price_prediction_task(xnft: xNFT) -> AITask {
return {
"name": "price_prediction",
"type": "predictive",
"schedule": "every_1_hour",
"execute": null
};
}
fn handle_price_prediction_alert(xnft: xNFT, prediction: any) -> Result<Unit, Error> {
let alert_message = "Price prediction alert";
// Send alert to NFT owner
this.send_nft_alert(xnft.owner_address, "price_prediction", {
"nft_id": xnft.id,
"prediction": prediction,
"message": alert_message
});
// Execute automated actions if configured
if (xnft.dynamic_properties.automated_trading ) {
this.execute_automated_trading_action(xnft, prediction);
}
log::info("xnft", {
"event": "price_prediction_alert",
"nft_id": xnft.id,
"direction": prediction.direction,
"confidence": prediction.confidence
});
return Ok(Unit);
}
// ================================================
// CROSS-CHAIN FEATURES
// ================================================
fn transfer_cross_chain(token_id: String, from_chain: String, to_chain: String, recipient: String) -> Result<CrossChainTransfer, Error> {
let xnft = self.nft_registry.get(token_id);
if (xnft == null ) {
return Err(Error::new("NFTNotFound", "not found"));
}
// Validate chains are supported
if (!self.supported_chains.contains(from_chain) ) {
return Err(Error::new("UnsupportedChain", "One or both chains are not supported"));
}
// Check if cross-chain transfer is allowed for this NFT
if (!xnft.dynamic_properties.cross_chain_enabled ) {
return Err(Error::new("CrossChainDisabled", "This NFT does not support cross-chain transfers"));
}
// Lock NFT on source chain
let lock_result = chain::lock_nft_for_transfer(from_chain, xnft.contract_address, token_id);
// Mint equivalent NFT on destination chain
let mint_result = chain::mint_cross_chain_nft(to_chain, {
"original_token_id": token_id,
"original_chain": from_chain,
"original_contract": xnft.contract_address,
"recipient": recipient,
"metadata": xnft.metadata,
"executable_code": xnft.executable_code
});
// Update NFT registry with new chain information
xnft.chain = to_chain;
xnft.contract_address = mint_result.contract_address;
xnft.owner_address = recipient;
// Burn original NFT
let burn_result = chain::burn_original_nft(from_chain, xnft.contract_address, token_id);
// Record cross-chain transfer
this.record_cross_chain_transfer(xnft, from_chain, to_chain, lock_result, mint_result, burn_result);
return Ok({
"token_id": token_id,
"from_chain": from_chain,
"to_chain": to_chain,
"recipient": recipient,
"source_tx": lock_result.transaction_hash,
"destination_tx": mint_result.transaction_hash,
"burn_tx": burn_result.transaction_hash,
"transfer_complete": true
});
}
// ================================================
// UTILITY METHODS
// ================================================
fn generate_unique_token_id(collection: String) -> String {
let timestamp = chain::get_block_timestamp();
let random_component = crypto::generate_random_bytes(8);
return collection + "_" + timestamp;
}
fn validate_executable_code(code: String) -> ValidationResult {
// Basic syntax validation
let syntax_check = this.check_code_syntax(code);
if (!syntax_check.valid ) {
return { "valid": false, "errors": syntax_check.errors };
}
// Security validation
let security_check = this.check_code_security(code);
if (!security_check.secure ) {
return { "valid": false, "errors": security_check.violations };
}
// Performance validation
let performance_check = this.analyze_code_performance(code);
if (performance_check.complexity > 100 ) {
return { "valid": false, "errors": ["Code complexity too high"] };
}
return { "valid": true, "errors": [] };
}
fn create_execution_environment(context: any) -> ExecutionEnvironment {
return {
"nft": context.nft,
"trigger_event": context.trigger_event,
"oracle_data": context.oracle_data,
"blockchain_state": context.blockchain_state,
"ai_insights": context.ai_insights,
"allowed_functions": self.execution_engine.allowed_functions,
"max_memory": self.execution_engine.memory_limit,
"timeout": self.execution_engine.max_execution_time
};
}
fn get_relevant_oracle_data(xnft: xNFT) -> any {
let relevant_feeds = [];
for feed_name in self.oracle_feeds.keys() {
let feed = self.oracle_feeds[feed_name];
if (xnft.dynamic_properties.oracle_sources &&
xnft.dynamic_properties.oracle_sources.contains(feed_name) ) {
let data = oracle::get_latest_data(feed);
relevant_feeds.push({
"feed_name": feed_name,
"data": data,
"timestamp": data.timestamp
});
}
}
return relevant_feeds;
}
fn check_execution_constraints(xnft: xNFT) -> ConstraintCheck {
let now = chain::get_block_timestamp();
// Check cooldown
if (xnft.execution_state.cooldown_until && now < xnft.execution_state.cooldown_until ) {
return {
"allowed": false,
"reason": "NFT is in cooldown period"
};
}
// Check energy level
if (xnft.execution_state.energy_level < 10 ) {
return {
"allowed": false,
"reason": "NFT energy level too low"
};
}
// Check execution limits
if (xnft.execution_state.execution_count > 1000 ) {
return {
"allowed": false,
"reason": "Execution limit exceeded"
};
}
return { "allowed": true, "reason": null };
}
fn record_execution_event(xnft: xNFT, trigger_event: any, execution_result: ExecutionResult) -> Unit {
database::execute_query(self.database, "
INSERT INTO nft_events (nft_id, event_type, event_data, triggered_by, transaction_hash, gas_used)
VALUES ($1, $2, $3, $4, $5, $6)
", [
xnft.id,
"execution",
json::stringify({
"trigger_event": trigger_event,
"execution_result": execution_result,
"timestamp": chain::get_block_timestamp()
}),
// trigger_event.triggered_by
execution_result.blockchain_tx,
execution_result.gas_used
]);
}
fn send_nft_alert(owner_address: String, alert_type: String, alert_data: any) -> Unit {
// Implementation would integrate with notification service
log::info("xnft", {
"event": "nft_alert_sent",
"owner": owner_address,
"alert_type": alert_type,
"alert_data": alert_data
});
}
}
// =====================================================
// UTILITY STRUCTURES (DAL uses Map/any; struct syntax not supported)
// =====================================================
// Shape reference: xNFT { id, contract_address, chain, owner_address, metadata, executable_code, execution_state, dynamic_properties, created_at, ai_enabled }