Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

CREATE2 gas cost update #1204

Merged
merged 3 commits into from
Oct 5, 2018
Merged

CREATE2 gas cost update #1204

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
9493840
Update CREATE2 gas cost calculation with SHA3 cost
mkalinin Oct 4, 2018
b2ba99a
Use VMUtils.getSizeInWords() in precompiles
mkalinin Oct 4, 2018
fe10be2
Remove redundant checks in gas calculations
mkalinin Oct 4, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 4 additions & 3 deletions ethereumj-core/src/main/java/org/ethereum/vm/PrecompiledContracts.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@
import static org.ethereum.util.BIUtil.isLessThan;
import static org.ethereum.util.BIUtil.isZero;
import static org.ethereum.util.ByteUtil.*;
import static org.ethereum.vm.VMUtils.getSizeInWords;

/**
* @author Roman Mandeleil
Expand Down Expand Up @@ -102,7 +103,7 @@ public long getGasForData(byte[] data) {
// gas charge for the execution:
// minimum 1 and additional 1 for each 32 bytes word (round up)
if (data == null) return 15;
return 15 + (data.length + 31) / 32 * 3;
return 15 + getSizeInWords(data.length) * 3;
}

@Override
Expand All @@ -120,7 +121,7 @@ public long getGasForData(byte[] data) {
// gas charge for the execution:
// minimum 50 and additional 50 for each 32 bytes word (round up)
if (data == null) return 60;
return 60 + (data.length + 31) / 32 * 12;
return 60 + getSizeInWords(data.length) * 12;
}

@Override
Expand All @@ -142,7 +143,7 @@ public long getGasForData(byte[] data) {
// gas charge for the execution:
// minimum 50 and additional 50 for each 32 bytes word (round up)
if (data == null) return 600;
return 600 + (data.length + 31) / 32 * 120;
return 600 + getSizeInWords(data.length) * 120;
}

@Override
Expand Down
9 changes: 6 additions & 3 deletions ethereumj-core/src/main/java/org/ethereum/vm/VM.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@
import static org.ethereum.util.ByteUtil.EMPTY_BYTE_ARRAY;
import static org.ethereum.util.ByteUtil.toHexString;
import static org.ethereum.vm.OpCode.*;
import static org.ethereum.vm.VMUtils.getSizeInWords;

/**
* The Ethereum Virtual Machine (EVM) is responsible for initialization
Expand Down Expand Up @@ -320,7 +321,7 @@ else if (!currentValue.isZero() && newValue.isZero()) {
case SHA3:
gasCost = gasCosts.getSHA3() + calcMemGas(gasCosts, oldMemSize, memNeeded(stack.peek(), stack.get(stack.size() - 2)), 0);
DataWord size = stack.get(stack.size() - 2);
long chunkUsed = (size.longValueSafe() + 31) / 32;
long chunkUsed = getSizeInWords(size.longValueSafe());
gasCost += chunkUsed * gasCosts.getSHA3_WORD();
break;
case CALLDATACOPY:
Expand Down Expand Up @@ -394,8 +395,10 @@ else if (!currentValue.isZero() && newValue.isZero()) {
memNeeded(stack.get(stack.size() - 2), stack.get(stack.size() - 3)), 0);
break;
case CREATE2:
gasCost = gasCosts.getCREATE() + calcMemGas(gasCosts, oldMemSize,
memNeeded(stack.get(stack.size() - 2), stack.get(stack.size() - 3)), 0);
DataWord codeSize = stack.get(stack.size() - 3);
gasCost = gasCosts.getCREATE() +
calcMemGas(gasCosts, oldMemSize, memNeeded(stack.get(stack.size() - 2), codeSize), 0) +
getSizeInWords(codeSize.longValueSafe()) * gasCosts.getSHA3_WORD();
break;
case LOG0:
case LOG1:
Expand Down
7 changes: 7 additions & 0 deletions ethereumj-core/src/main/java/org/ethereum/vm/VMUtils.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -153,4 +153,11 @@ public static String unzipAndDecode(String content) {
return content;
}
}

/**
* Returns number of VM words required to hold data of size {@code size}
*/
public static long getSizeInWords(long size) {
return size == 0 ? 0 : (size - 1) / 32 + 1;
}
}