CoreMarket

CoreMarket is the main marketplace contract — think of it as the "Amazon" of prediction markets. It's where markets are created, bets are placed, and winnings are claimed.

Overview

CoreMarket serves as the central hub where:

• Markets are created and stored
• Users place their bets
• Winners collect their rewards
• Fees are collected and distributed

Key Concepts

What is a Market?

A market is a prediction question with:

• A clear YES/NO question
• A deadline for betting
• A resolution method
• A pool of bets on each side

Market States

1. Active — Accepting bets (first 50% of duration)
2. Closed — No more bets (last 50% of duration)
3. Ended — Waiting for resolution
4. Resolved — Outcome determined, ready for claims

User Roles and Permissions

Anyone Can

• Create a market (requires 2000 ORMT burn)
• Place bets on any market
• View all market information
• Claim winnings from resolved markets

Market Creator Can

• All public actions
• Collect creator fees (5% of total pool)
• Resolve their manual markets
• Set initial market parameters

Admin Can

• Pause/unpause the entire system
• Update fee structures (admin fee max 25%)
• Emergency market interventions
• Upgrade contract logic
• Sponsor markets with balanced liquidity (market making)
• Cannot place directional bets

Core Functions Explained

1) createMarket

What it does: Creates a new prediction market

Requirements:

• Burn 2000 ORMT
• Provide at least 0.01 ETH initial liquidity
• Question under 500 characters, description under 1000

Process:

1. Token Burn (tax-free)
2. Validate inputs
3. Store market details on-chain
4. Lock initial ETH as betting pool
5. Emit MarketCreated

Parameters:

• question, description, duration, minBet, maxBet, marketType (0 Manual, 1 Oracle, 2 Random), oracleData, msg.value

2) placeBet

What it does: Places a YES or NO bet on a market

Requirements:

• Market is in the first half of its duration
• Bet amount within min/max bounds

Process:

1. Validate market state
2. Slippage check via minOdds
3. Record bet
4. Update pools and odds

Odds calculation:

YES Odds = NO Pool / (YES Pool + NO Pool) × 100
NO Odds  = YES Pool / (YES Pool + NO Pool) × 100

3) claimWinnings

What it does: Collects rewards from winning bets

Requirements:

• Market is resolved, caller has winning bets

Process:

1. Verify winner
2. Compute share of the 75% winners pool (after fees)
3. Transfer ETH and mark claimed

Payout calculation:

Total Pool After Fees = Total Pool × 75%
Your Share = Your Bet / Total Winning Bets
Your Winnings = Your Share × Total Pool After Fees

4) sponsorMarketBalanced (Admin)

What it does: Admins add liquidity to both sides equally to bootstrap markets, acting as market makers (not taking positions).

Financial Flows and Fees

From the total pool, 25% fees are collected on resolution and split:

Security Features

• Betting cutoff at 50% of duration (prevents last-minute manipulation)
• Reentrancy guards around state-changing functions
• Slippage protection via minOdds
• Global pause mechanism

State Transitions

Created → Active → Closed → Ended → Resolved → Claimed
   ↓        ↓        ↓        ↓        ↓          ↓
 [New]   [Betting] [Waiting] [Done]  [Outcome]  [Paid]

On-chain (Sepolia)

{
  address: "0x36b5ebE5a161E7d1C7B75aBce457d7066d87e6DB"
}