Contract Functions

Complete reference for all public functions.

User Functions

deposit

Deposit USDC to your trading balance.

function deposit(uint256 amount) external

  • Requires USDC approval first

  • Amount in USDC units (6 decimals)

withdraw

Withdraw USDC from trading balance to wallet.

function withdraw(uint256 amount) external

  • Cannot exceed your balance

  • Sent directly to msg.sender

buyShares

Buy YES or NO shares in a market.

function buyShares(uint256 marketId, bool isYes, uint256 amount) external

  • isYes: true for YES, false for NO

  • amount: USDC to spend (before fees)

  • 2% fee deducted automatically

sellShares

Sell shares back to the AMM.

function sellShares(uint256 marketId, bool isYes, uint256 shares) external

  • Must have enough shares

  • Receives USDC at current market price

claimWinnings

Claim payout from a resolved market.

function claimWinnings(uint256 marketId) external

  • Only works if you hold winning shares

  • Adds USDC to your trading balance

Resolution Functions

proposeOutcome

Propose the outcome of an expired market.

function proposeOutcome(uint256 marketId, bool outcome) external

  • Requires proposal bond (5 USDC from balance)

  • outcome: true for YES, false for NO

  • Starts 24-hour challenge period

challengeOutcome

Challenge the current proposed outcome.

function challengeOutcome(uint256 marketId) external

  • Requires challenge bond (10 USDC, escalates)

  • Flips the proposed outcome

  • Resets challenge period

finalizeOutcome

Finalize outcome after challenge period.

function finalizeOutcome(uint256 marketId) external

  • Anyone can call

  • Challenge period must be over

  • Distributes bonds to correct proposer

Market Creation

createMarket

Create a new prediction market.

function createMarket(
    string calldata question,
    string calldata category,
    uint256 deadline,
    string calldata resolutionSource
) external

  • Requires 100 USDC for initial liquidity

  • Deadline must be in the future

  • Returns new market ID

View Functions

getMarket

Get full market details.

function getMarket(uint256 marketId) external view returns (Market memory)

getPosition

Get user's position in a market.

function getPosition(uint256 marketId, address user) external view returns (Position memory)

getPrice

Get current share prices.

function getPrice(uint256 marketId) external view returns (uint256 yesPrice, uint256 noPrice)

Prices returned in basis points (5000 = $0.50).

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