Trading & Orders

Goal: users buy/sell YES/NO via signed limit orders on the CTFExchange (CLOB model).

Status

S2.3 ✅ fillOrder e2e tested (6 tests); S2.4 ✅ SDK signOrder/hashOrder (EIP-712, golden-digest parity).

Design

• Orders are EIP-712 signed off-chain (signOrder), then filled on-chain via CTFExchange.fillOrder. The operator (or MM agent) fills user orders.
• BUY/SELL sides; partial fills supported.

Open questions

• Q-S2.3.2 — matchOrders vs fillOrder model (HIGH; MM capital + audit surface).
• Q-S2.3.3 — fee policy (feeRateBps 0 vs nonzero).

Features

• Order signing (off-chain)
  • EIP-712 signOrder + hashOrder parity (S2.4)
• Order fill (on-chain)
  • fillOrder full + partial tested (S2.3)
  • (you) Decide matchOrders vs fillOrder before the MM agent
  • Add matchOrders Foundry coverage (MINT / MERGE / COMPLEMENTARY)
• Fees
  • (you) Decide the fee policy; enforce a slippage guard in the SDK