// Mint tokens to an address (owner/minter only)
function mint(address to, uint256 amount) external;

// Standard ERC-20 balance check
function balanceOf(address account) external view returns (uint256);

// Standard ERC-20 transfer
function transfer(address to, uint256 amount) external returns (bool);

// Place a bet on a market
function placeBet(
    bytes32 marketId,    // Polymarket condition ID (hashed)
    bool isYes,          // true for YES, false for NO
    uint256 amount,      // Bet amount in wei
    uint256 odds         // Current odds at time of bet
) external;

// Settle a market with final outcome (settler only)
function resolveMarket(bytes32 marketId, bool outcome) external;

// Process payout for a single bet
function settleBet(uint256 betId) external;

// Preview potential payout
function calculatePayout(uint256 amount, uint256 odds) 
    external view returns (uint256);

User bets $10 on YES at 65% odds:

Shares purchased: 10 / 0.65 = 15.38 shares
If YES wins: Payout = 15.38 tokens
Platform fee (1.5%): 0.23 tokens
Net payout: 15.15 tokens
Profit: 5.15 tokens

If NO wins: User loses $10 bet