Full collateral before an offer is sold
A writer deposits the token the buyer may receive into the vault for the selected market. A vault is an onchain contract that holds collateral and records how much belongs to each writer. When the writer posts an offer, the corresponding amount becomes locked. When a buyer purchases that offer, the sold amount stays locked to back the buyer’s rights. The writer cannot withdraw that collateral while the obligation remains outstanding. For a right to receive 100,000 USDC, the matching 100,000 USDC is already committed. The design does not rely on the writer finding or depositing those funds later when the buyer exercises. Locked collateral is not lent, restaked or reused to support unrelated positions. Depositing collateral does not itself generate yield. Writer earnings arise when buyers purchase their offers.Three distinct places for funds
The holding contracts are also called escrows. They keep a record of each recipient’s claim. Premium earnings are separate from exercise proceeds because the two payments can use different tokens.

