Generating sampling proof: using the Merkle root as a random source, we sample the data. To avoid leaking computation trace data, we avoid the data with an index of *k ** extension_factor during sampling and generate the Merkle proof path corresponding to the sampling index. We do the sampling inspections to check whether the polynomial committed is a valid polynomial satisfying the constraints listed in number 1.

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In the sample, it transfers 10 ETH to the position. Cross account balance will be 15 ETH - 10 ETH = 5 ETH, Isolated marigin trading position asset will be 10 ETH. Buy 10 ETH at 1,409.98 and use ETH as margin. The ETH order is filled with a fee of -0.01 ETH.