The on-chain record

What is on Solana

The MemeLiquid program on Solana holds the USDC vault, publishes every price, and records every deposit, open, close, liquidation, payout and withdrawal as an entry. Each entry's hash covers the one before it, so the record can't be changed or shortened later.

Trades and their prices

Every open, close and liquidation names the price push it filled at. When it is recorded, the program compares the trade's price with the price it published in that push, and refuses the entry if they differ. A trade at a price that was never published can't be recorded.