DeFi Ecosystem

// Asset creation
fn asset_create(...) -> Hash;
 
// Transfers
fn transfer(to: Address, asset: Hash, amount: u64) -> Result<(), Error>;
fn transfer_from(from: Address, to: Address, asset: Hash, amount: u64) -> Result<(), Error>;
 
// Approvals
fn approve(spender: Address, asset: Hash, amount: u64) -> Result<(), Error>;
fn get_allowance(owner: Address, spender: Address, asset: Hash) -> u64;
 
// Supply management
fn mint(asset: Hash, to: Address, amount: u64) -> Result<(), Error>;
fn burn(asset: Hash, amount: u64) -> Result<(), Error>;
 
// Governance
fn delegate(asset: Hash, delegatee: Address) -> Result<(), Error>;
fn get_votes(account: Address, asset: Hash) -> u64;
fn get_past_votes(account: Address, asset: Hash, block: u64) -> u64;

Traditional DeFi:
User -> approve -> DEX -> transferFrom -> User's tokens in DEX contract
(Assets leave user's account)

TOS DeFi:
User -> lock_asset -> DEX -> lock_use -> User's tokens stay locked in user account
(Assets never leave user's account)

// Lock assets (assets stay in user's account)
fn lock_asset(
    asset: Hash,
    amount: u64,
    authorized_user: Address,  // Who can use the lock
    unlock_height: u64         // Auto-unlock block height
) -> u64;  // Returns lock_id
 
// Use locked assets (authorized contracts only)
fn lock_use(
    owner: Address,
    asset: Hash,
    amount: u64,
    lock_id: u64,
    contract: Address
) -> Result<(), Error>;
 
// Mark lock as collateral (prevents unlock while debt exists)
fn set_lock_collateral(lock_id: u64, is_collateral: bool) -> Result<(), Error>;
 
// Get lock information
fn get_lock(lock_id: u64) -> Option<LockInfo>;

Traditional:  Data Source -> Node Aggregation -> On-chain (single point of failure)

TOS:         Multiple Sources -> AI Verification Layer -> Consensus -> On-chain
                                       |
                          Anomaly Detection + Manipulation Recognition + Confidence

// Basic price query
fn get_price(asset: Hash) -> Result<PriceData, OracleError>;
 
// Safe price with AI analysis
fn get_price_safe(asset: Hash, max_deviation: u16) -> Result<SafePriceData, OracleError>;
 
// Time-weighted average price
fn get_twap(asset: Hash, period: u64) -> Result<u128, OracleError>;
 
// Collateral valuation
fn get_collateral_value(assets: &[(Hash, u128)]) -> Result<CollateralValue, OracleError>;
 
// Mark price for perpetuals
fn get_mark_price(asset: Hash) -> Result<MarkPrice, OracleError>;

pub struct SafePriceData {
    /// Current price
    price: u128,
    /// AI safety assessment
    is_safe: bool,
    /// Manipulation risk (0-100)
    manipulation_risk: u8,
    /// AI recommendation
    recommendation: PriceAction,
}
 
pub enum PriceAction {
    UsePrice,       // Normal use
    UseWithCaution, // Increase collateral margin
    DelayAction,    // Wait for price stability
    RejectAction,   // High risk - block operation
}

// Lending: Check before liquidation
let safe_price = get_price_safe(collateral_asset, 100)?;
 
match safe_price.recommendation {
    PriceAction::UsePrice => allow_liquidation(),
    PriceAction::UseWithCaution => increase_safety_margin(),
    PriceAction::DelayAction => wait_for_stability(),
    PriceAction::RejectAction => block_potential_attack(),
}

// Swap using Asset Lock (assets stay with user)
pub fn swap(
    token_in: Hash,
    token_out: Hash,
    amount_in: u64,
    lock_id: u64,      // User's locked tokens
    min_out: u64,
    recipient: Address,
) -> Result<u64, Error> {
    // AI Oracle validates price safety
    let risk = check_arbitrage_risk(token_in, token_out, rate)?;
 
    // Use locked tokens (assets don't enter contract)
    lock_use(caller, token_in, amount_in, lock_id, self_address())?;
 
    // Transfer output to recipient
    transfer(recipient, token_out, amount_out)?;
 
    Ok(amount_out)
}

// Collateral using Asset Lock (assets stay with user)
pub fn supply_collateral(
    asset: Hash,
    amount: u64,
    lock_id: u64,
) -> Result<(), Error> {
    // Lock assets as collateral
    set_lock_collateral(lock_id, true)?;
}
 
// AI-protected liquidation
pub fn liquidate(...) -> Result<u64, Error> {
    let safety = is_liquidation_safe(collateral, debt, ...)?;
 
    match safety.recommendation {
        LiquidationAction::Reject => return Err(Error::LiquidationUnsafe),
        LiquidationAction::Delay => return Err(Error::LiquidationDelayed),
        _ => proceed_with_liquidation(),
    }
}

// Open position with margin lock
pub fn increase_position(
    index_token: Hash,
    collateral_token: Hash,
    size_delta: u128,
    is_long: bool,
    lock_id: u64,      // Locked margin
) -> Result<Hash, Error> {
    // AI Oracle mark price
    let mark_price = get_mark_price(index_token)?;
 
    // AI validates position safety
    let safety = is_position_safe(index_token, size_delta, is_long, price)?;
 
    match safety.recommendation {
        PositionAction::Reject => return Err(Error::PositionUnsafe),
        PositionAction::ReduceLeverage => reduce_leverage(),
        _ => {}
    }
 
    // Lock margin
    lock_use(caller, collateral, amount, lock_id, self_address())?;
    set_lock_collateral(lock_id, true)?;
}

// Create prediction market
pub fn create_market(
    question_hash: Hash,
    outcomes: Vec<String>,
    resolution_time: u64,
    oracle_config: OracleConfig,
) -> Result<Hash, Error> {
    // Create outcome tokens (Native Assets)
    for outcome in &outcomes {
        let token = asset_create(outcome_name, total_supply)?;
        outcome_tokens.push(token);
    }
}
 
// Buy outcome tokens
pub fn buy_outcome(
    market_id: Hash,
    outcome_index: u8,
    amount: u64,
    lock_id: u64,
) -> Result<u64, Error> {
    // Use locked collateral
    lock_use(caller, collateral, amount, lock_id, self_address())?;
 
    // Mint outcome tokens
    let tokens = calculate_outcome_tokens(amount, outcome_index)?;
    mint(outcome_token, caller, tokens)?;
}

// Leveraged yield farming: Lending + DEX + Vault
pub fn open_leveraged_farm(
    collateral_asset: Hash,
    collateral_amount: u64,
    lock_id: u64,
    borrow_asset: Hash,
    target_leverage: u16,  // 300 = 3x
    vault_id: Hash,
) -> Result<LeveragedPosition, Error> {
    // AI global risk assessment
    let global_risk = ai_assess_leverage_strategy(...)?;
 
    // Step 1: Deposit collateral to Lending
    lock_use(caller, collateral_asset, collateral_amount, lock_id, LENDING)?;
    call_contract(LENDING, "supply_collateral", &[...])?;
 
    // Step 2: Borrow
    call_contract(LENDING, "borrow", &[...])?;
 
    // Step 3: Deposit borrowed amount to Vault
    let borrow_lock = lock_asset(borrow_asset, borrow_amount, VAULT, 1000000)?;
    call_contract(VAULT, "deposit", &[...])?;
}

// Block information
fn get_block_timestamp() -> u64;
fn get_block_number() -> u64;
 
// Contract calls
fn call_contract(contract: Hash, method: &str, params: &[Value]) -> Result<Value, Error>;
 
// Events
fn emit_event(name: &str, data: &[u8]) -> Result<(), Error>;
 
// Storage
fn storage_get(key: &[u8]) -> Option<Vec<u8>>;
fn storage_set(key: &[u8], value: &[u8]) -> Result<(), Error>;

// Signature verification
fn verify_signature(pubkey: &[u8], message: &[u8], signature: &[u8]) -> bool;
 
// AI Price Oracle
fn get_price(asset: Hash) -> Result<PriceData, OracleError>;
fn get_price_safe(asset: Hash, max_deviation: u16) -> Result<SafePriceData, OracleError>;
fn get_twap(asset: Hash, period: u64) -> Result<u128, OracleError>;

// Pause/unpause
fn pause(asset: Hash) -> Result<(), Error>;
fn unpause(asset: Hash) -> Result<(), Error>;
 
// Blacklist
fn blacklist(asset: Hash, account: Address) -> Result<(), Error>;
fn unblacklist(asset: Hash, account: Address) -> Result<(), Error>;