Implement gas refund #493
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Implement gas refund #493
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chfast
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@@ Coverage Diff @@
## master #493 +/- ##
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+ Coverage 99.39% 99.40% +0.01%
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Files 53 53
Lines 5145 5249 +104
==========================================
+ Hits 5114 5218 +104
Misses 31 31
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gumb0
reviewed
Aug 18, 2022
chfast
commented
Aug 18, 2022
gumb0
reviewed
Aug 19, 2022
test/unittests/evm_storage_test.cpp
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| int64_t expected_gas_refund) { | ||
| auto& storage = host.accounts[msg.recipient].storage; | ||
| storage[key] = {current, original}; | ||
| execute(sstore(0xef, calldataload(0)), value); |
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maybe could be simpler
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| execute(sstore(0xef, calldataload(0)), value); | |
| execute(sstore(0xef, value), {}); |
gumb0
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Aug 19, 2022
test/unittests/evm_storage_test.cpp
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| int64_t clear = -1; | ||
| }; | ||
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| auto test = [this](const evmc::bytes32& original, const evmc::bytes32& current, |
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Could this helper be reused between two tests?
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This is rather difficult because it accesses this.
gumb0
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Aug 19, 2022
| EXPECT_GAS_USED(EVMC_SUCCESS, 7603); // Cold access to 0xbe. | ||
| EXPECT_EQ(result.gas_refund, 24000); | ||
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| // Second selfdestruct of the same account. |
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Maybe also add a test for another selfdestruct of different account
gumb0
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Aug 19, 2022
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| const auto a = 0xaa_address; | ||
| const auto code = | ||
| call(a) + callcode(a) + delegatecall(a) + staticcall(a) + create() + create2(); |
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may be redundant, but I thought of having two calls of each type to check that it's also aggregated for same type calls.
gumb0
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Aug 19, 2022
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Calculate, aggregate and report the gas refund. This requires changes to
SSTORE,SELFDESTRUCTand calls (propagate gas refund).