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• A - ERC1155 outcome token
• A' - ERC1155 complementary outcome token*
• C - ERC20 collateral token
• All examples assume A and A' are priced at 0.5 USDC each

*Note: Complementary relationship means 1 outcome token + 1 complementary token can be merged into 1 collateral token, and vice versa (i.e., A + A' = C). Assume outcome tokens and collateral tokens have the same decimal precision. Examples assume C is USDC.

• user1 buys 100 A, transfers 50 C to exchange
• user2 buys 100 A', transfers 50 C to exchange
• Exchange mints 100 A for user1, 100 A' for user2

const takerOrder = {
    salt: randomId(),
    maker: user1,
    tokenId: 1, // Token ID for A'
    tokenAmount: 100 * 10**6,
    tokenPriceInPaymentToken: 0.5 * 10**6, // 0.5 USDC (could be 0 for market orders)
    paymentTokenAddress: '0xxxxx', // USDC address
    slippageBps: 100, // Allowed slippage (0 indicates limit order)
    deadline: 1672531200, // Expiration timestamp
    side: 1, // 1: buy, 2: sell
    feeTokenAddress: '', // Fee token address (USDC or company token)
    
    // Signature fields
    sig: 'xxxxx', // Frontend signature of above data
    
    // Off-chain calculated transaction details
    exchangeNftAmount: 100 * 10**6, // NFT amount maker will receive
    paymentTokenAmount: 100 * 10**6, // USDC amount maker must pay
    paymentTokenAddress: '0xxxxx', // Payment token address (USDC)
    
    // Dual fee fields for multi-token fee support
    fee1Amount: 123, // Primary fee amount
    fee1TokenAddress: '0xxxxx', // Primary fee token (USDC/company token)
    fee2Amount: 456, // Secondary fee amount
    fee2TokenAddress: '0xxxxx' // Secondary fee token (USDC/company token)
}

const makerOrders = [{
    salt: randomId(),
    maker: user2,
    tokenId: 2, // Token ID for A'
    tokenAmount: 100 * 10**6,
    tokenPriceInPaymentToken: 0.5 * 10**6,
    paymentTokenAddress: '0xxxxx',
    slippageBps: 100,
    deadline: 1672531200,
    side: 1,
    feeTokenAddress: '',
    sig: 'xxxxx',
    exchangeNftAmount: 100 * 10**6,
    paymentTokenAmount: 100 * 10**6,
    paymentTokenAddress: '0xxxxx',
    fee1Amount: 123,
    fee1TokenAddress: '0xxxxx',
    fee2Amount: 456,
    fee2TokenAddress: '0xxxxx'
}]

matchOrders(takerOrder, makerOrders)

• user1 buys 100 A, transfers 50 C to exchange
• user2 sells 100 A, receives 50 C from exchange

• user1 sells 100 A
• user2 sells 100 A'
• Exchange merges 100 A + 100 A' into 100 C
• Exchange transfers 50 C to user1
• Exchange transfers 50 C to user2

Fees are collected from output assets (proceeds). For complementary binary tokens (A + A' = C), fees must maintain symmetry to preserve market integrity. Symmetry means selling 100 A at $0.99 and buying 100 A' at $0.01 should incur equal fee value.

Rules:

• Buy operations (receiving A/A') charge fees on output tokens
• Sell operations (receiving C) charge fees on collateral tokens

Base fee rate (baseFeeRate) is written into order structure, corresponding to 2x fee rate when tokens are equally priced ($0.50/$0.50). Price deviations use formula:

USDC fee = baseFeeRate * min(price, 1-price) * token quantity

Example 1:

• price = 0.2
• feeBps = 100
• fee = 0.01 * min(0.2, 0.8) * 100 = 0.2

Example 2:

• Selling 100 A at $0.99:
  0.01 * min(0.99, 0.01) * 100 = 0.01 (deduct 0.01 C as fee)
• Buying 100 A' at $0.01:
  0.01 * min(0.01, 0.99) * 100 = 0.01 (deduct 1 A' as fee)

Adam Ma – Founder & CEO

• Background: 15+ years in tech entrepreneurship with extensive Web2 and Web3 experience
• Web2 Experience: 360, iHealth , Sneaker Exchange platform (sneaker marketplace with millions in transaction volume)
• Web3 Expertise: Won 20+ global hackathon awards
• Current Focus: All-in on prediction markets since 2025, leading technical vision and product strategy

Alfred Fu – Co-founder & CMO

• Education: HKUST graduate with strong technical and creative background
• Experience: Years at Tsinghua Research Institute, deep expertise in AI tools and product ideation
• Role: Leads product design, social media strategy, and brand development
• Skills: Combines technical development experience with creative marketing insights

• 3 Full-Stack Core Developers: Experienced team covering backend, frontend, and smart contract development
• Total Team Size: 5 members (2 founders + 3 developers) with plans to expand

• Balanced Expertise: Technical depth combined with creative vision and business acumen
• Web3 Experience: Extensive blockchain and prediction market knowledge
• APAC Focus: Native understanding of Asian markets and cultural nuances
• Execution Track Record: Successfully launched functional MVP with real users