Fees & Incentives

Trading Fees

Strike uses a uniform fee model with a 50/50 buyer–seller split:

Parameter	Rate	Description
Total fee	20 bps (0.20%)	Split equally between buyer and seller
Buy-side fee	floor(fee / 2)	Deducted from buyer's filled collateral at settlement
Sell-side fee	ceil(fee / 2)	Deducted from seller's USDT payout at settlement

• No maker/taker distinction — both sides pay half the fee

• The extra wei from integer rounding goes to the protocol (sell side pays ceil)

• Fees are deducted during atomic batch settlement (inline with clearing)

• All fees go to the protocolFeeCollector address

Protocol Revenue

All trading fees flow to the protocol fee collector address. This funds development and operations.

Resolution and Keeper Costs

Markets can be resolved permissionlessly by anyone with valid Pyth data. Hosted keepers normally perform resolution. Current core CLOB contracts do not pay a resolver bounty.

Anti-Spam / DoS Prevention

Mechanism	Purpose
Minimum lot size	Prevents dust orders (MIN_LOTS = 1, i.e. $0.01)
Full collateral locking	Economic cost to placing orders (USDT locked until fill or cancel)
ERC-20 approval required	Users must approve Vault before placing orders
Per-user active order cap	MAX_USER_ORDERS = 20 per market — prevents a single address from flooding the book

The per-user order cap is tracked via an activeOrderCount mapping and enforced on placeOrder, placeOrders, and replaceOrders. Orders freed by cancellation or settlement decrement the counter.

Cost Estimates (BSC at 0.05 gwei)

Action	Est. Gas	Est. Cost
Approve Vault (once)	~46k	~$0.001
Place order	~250k	~$0.008
Cancel order	~100k	~$0.003
Clear batch / settlement chunk	varies by batch size	network-dependent
Resolve market	~300k	~$0.009

Estimates are illustrative. Settlement is handled through clearBatch; large batches can require multiple settlement chunks.