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chfast
suggested changes
Jun 19, 2017
libethereum/State.cpp
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| break; | ||
| case Change::NewCode: | ||
| account.resetCode(); | ||
| if (change.oldCode.empty()) |
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Here I would go with account.setNewCode(std::move(change.oldCode)); all the time. Moving empty bytes is not more costly than reset.
chfast
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Jun 19, 2017
libethereum/State.cpp
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| account.resetCode(); | ||
| else | ||
| account.setNewCode(std::move(change.oldCode)); | ||
| account.setNewCode(std::move(change.oldCode)); |
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Hm... after these changes it looks we should also rename .setNewCode() to just .setCode().
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That's true. I'll add a commit to this PR.
pirapira
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Jun 20, 2017
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The best! |
This addresses #4130 together with the corresponding change in the test.
Rebased after the snark tests because the snark precompiles are already implemented on cpp-ethereum:develop
Codecov Report
@@ Coverage Diff @@
## develop #4151 +/- ##
==========================================
- Coverage 67.08% 66.99% -0.1%
==========================================
Files 299 299
Lines 23141 23148 +7
==========================================
- Hits 15525 15508 -17
- Misses 7616 7640 +24
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All green! |
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This fixes #4130 .
Before Metropolis, when an address collision happens, an existing non-empty code could be overwritten. The journaling system didn't remember the old code, so it could not recover the old code. This PR fixes that problem.