Method and device for improving bytecode reverse engineering effect of smart contract
A reverse engineering, smart contract technology, applied in reverse engineering, software maintenance/management, etc., can solve problems such as difficulty in understanding programs, inability to recover function signatures, inability to recover variable types, etc., to achieve the effect of increasing transparency and improving effects
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[0027] We use Erays + (the application method) and Erays (the prior art method) the result of reverse engineering the same bytecode. Erays+ adds the function signature (EarysABI) provided by SigRec (line 1). Since the restored function signature does not include the function name and parameter names, Erays + The function id is used, and argN is used for the Nth argument. Figure 4 Lines 7 and 8 in correspond to lines 4 and 5 in the source code. In addition, Erays + The code generated by the compiler to check ether transfers (line 2), array overflow (lines 3-6), and terminate program execution (line 10) is preserved. Note that Erays simplifies the lower dimension bounds checks to true (Lines 4-6), since the sizes of the lower dimensions are known, so the results of these bounds checks can be determined without being performed. Then we explain. Erays + How to simplify the result of Erays. First, Erays + Replace the meaningless variable name m[$s5] with num(arg1), indica...
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