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SENQ Demo Script

Duration: 3 minutes Audience: Avalanche Build Games judges

Opening (0:00 - 0:20)

"SENQ is a prediction market built on Avalanche C-Chain. It uses a smart contract with JPYC — a JPY-pegged ERC20 stablecoin — to create a trustless, verifiable betting platform."

Show: Homepage with market listings

Problem & Solution (0:20 - 0:40)

"Traditional prediction markets use complex AMM pricing. SENQ uses parimutuel betting instead — simple pool-based payouts where winners share proportionally. This fits naturally with EVM's architecture and makes JPY-denominated prediction markets accessible."

Show: Architecture diagram

Live Demo: Betting Flow (0:40 - 1:40)

1. Connect Wallet (0:40 - 0:50)

"Let's place a bet. First, I connect my MetaMask wallet."

Action: Click Connect → MetaMask popup → Approve connection

2. Select Market (0:50 - 1:00)

"I'll bet on the Miyagi governor election prediction market."

Action: Navigate to market detail page

3. Place Bet (1:00 - 1:20)

"I'll bet 1,000 JPYC on 村井嘉浩. The system calls the SENQMarket contract: first approve JPYC spending, then place the bet."

Action: Enter amount → Click 予測する → Sign two transactions in MetaMask (approve + bet)

4. Verify On-Chain (1:20 - 1:40)

"My bet is now recorded on Avalanche C-Chain. Let's verify on the explorer."

Action: Click tx link → Show Snowtrace with contract interaction

EVM Features Deep Dive (1:40 - 2:20)

ERC20 (JPYC) (1:40 - 1:50)

"Bets use JPYC — a JPY-pegged stablecoin. Users approve the SENQMarket contract, which pulls JPYC into the pool via ERC20 transferFrom."

Smart Contract (1:50 - 2:00)

"SENQMarket holds all JPYC in escrow. It enforces deadlines, tracks bets per outcome, and executes payouts — all on-chain with no operator custody."

Multi-Sign Resolution (2:00 - 2:20)

"When the market closes, a 2-of-3 committee resolves the outcome. This prevents any single party from manipulating results."

Show: Resolution transaction on explorer

Payout Demo (2:20 - 2:40)

"When the market resolves, winners claim their proportional share of the pool directly from the contract. A 2% protocol fee supports the platform."

Show: Payout formula: Your Bet / Total Winning Bets × Total Pool

Closing (2:40 - 3:00)

"SENQ demonstrates how Avalanche's EVM — ERC20 tokens, smart contracts, and multi-sign governance — can power a complete JPY-denominated prediction market. All data is verifiable on-chain."

Show: GitHub repo + live deployment URL

Key Points to Emphasize

  1. Avalanche C-Chain — Fast, low-fee EVM execution
  2. JPYC Integration — JPY-pegged stablecoin, removes crypto volatility for users
  3. SENQMarket Contract — Fully on-chain bet management, payouts, and cancellations
  4. Multi-Sign Governance — No single point of manipulation
  5. Parimutuel Over AMM — Simple, fair, no impermanent loss

Backup Talking Points

If demo fails:

  • Walk through contract code (contracts/src/SENQMarket.sol)
  • Show pre-recorded happy path video
  • Highlight ERC20 approve/transferFrom pattern and on-chain payout logic

If time remaining:

  • Show weighted betting system (user attributes multiply bet effectiveness)
  • Explain 2% protocol fee and cancel/refund mechanism
  • Discuss future features (yield on locked JPYC, secondary trading)