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102 changes: 102 additions & 0 deletions
102
evm/src/main/java/org/hyperledger/besu/evm/operation/AuthCallOperation.java
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/* | ||
* Copyright contributors to Hyperledger Besu. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with | ||
* the License. You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | ||
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations under the License. | ||
* | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
package org.hyperledger.besu.evm.operation; | ||
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import static org.hyperledger.besu.evm.internal.Words.clampedToLong; | ||
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import org.hyperledger.besu.datatypes.Address; | ||
import org.hyperledger.besu.datatypes.Wei; | ||
import org.hyperledger.besu.evm.EVM; | ||
import org.hyperledger.besu.evm.frame.ExceptionalHaltReason; | ||
import org.hyperledger.besu.evm.frame.MessageFrame; | ||
import org.hyperledger.besu.evm.gascalculator.GasCalculator; | ||
import org.hyperledger.besu.evm.internal.Words; | ||
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import org.apache.tuweni.bytes.Bytes32; | ||
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/** Introduced via EIP-3074 to call another contract with a different authorization context. */ | ||
public class AuthCallOperation extends AbstractCallOperation { | ||
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/** | ||
* Instantiates a new AuthCallOperation. | ||
* | ||
* @param gasCalculator a Prague or later gas calculator | ||
*/ | ||
public AuthCallOperation(final GasCalculator gasCalculator) { | ||
super(0xF7, "AUTHCALL", 7, 1, gasCalculator); | ||
} | ||
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@Override | ||
protected Address to(final MessageFrame frame) { | ||
return Words.toAddress(frame.getStackItem(1)); | ||
} | ||
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@Override | ||
protected Wei value(final MessageFrame frame) { | ||
return Wei.wrap(frame.getStackItem(2)); | ||
} | ||
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@Override | ||
protected Wei apparentValue(final MessageFrame frame) { | ||
return value(frame); | ||
} | ||
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@Override | ||
protected long inputDataOffset(final MessageFrame frame) { | ||
return clampedToLong(frame.getStackItem(3)); | ||
} | ||
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@Override | ||
protected long inputDataLength(final MessageFrame frame) { | ||
return clampedToLong(frame.getStackItem(4)); | ||
} | ||
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@Override | ||
protected long outputDataOffset(final MessageFrame frame) { | ||
return clampedToLong(frame.getStackItem(5)); | ||
} | ||
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@Override | ||
protected long outputDataLength(final MessageFrame frame) { | ||
return clampedToLong(frame.getStackItem(6)); | ||
} | ||
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@Override | ||
protected Address address(final MessageFrame frame) { | ||
return to(frame); | ||
} | ||
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@Override | ||
protected Address sender(final MessageFrame frame) { | ||
return frame.getAuthorizedBy(); | ||
} | ||
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@Override | ||
public long gasAvailableForChildCall(final MessageFrame frame) { | ||
return gasCalculator().gasAvailableForChildCall(frame, gas(frame), !value(frame).isZero()); | ||
} | ||
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@Override | ||
public OperationResult execute(final MessageFrame frame, final EVM evm) { | ||
if (frame.isStatic() && !value(frame).isZero()) { | ||
return new OperationResult(cost(frame, true), ExceptionalHaltReason.ILLEGAL_STATE_CHANGE); | ||
} else if (frame.getAuthorizedBy() != null) { | ||
return super.execute(frame, evm); | ||
} else { | ||
frame.pushStackItem(Bytes32.ZERO); | ||
return new OperationResult(cost(frame, true), null); | ||
} | ||
} | ||
} |
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