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[PRIV] Maintain the state of MessageFrame in private Tx #1193
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PR description
The message frame gets updated with the gas used and output of the execution of privacy pre-compile contract. This leads to public and private nodes having different receipt roots causing them to fail with
Invalid block: receipts root mismatch
.We undo the frame updating such that the frame is set to the same state as that of public node and so it produces the same receipt.