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update sharding computation to new computation logic introduced in #244
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| from evm.constants import ( | ||
| STACK_DEPTH_LIMIT, | ||
| ) | ||
| from evm.exceptions import ( | ||
| OutOfGas, | ||
| InsufficientFunds, | ||
| StackDepthLimit, | ||
| ) | ||
| from evm.utils.hexadecimal import ( | ||
| encode_hex, | ||
| ) | ||
| from evm.utils.keccak import ( | ||
| keccak, | ||
| ) | ||
|
|
||
| from ..spurious_dragon.computation import ( | ||
| SpuriousDragonComputation, | ||
| ) | ||
| from ..spurious_dragon.constants import ( | ||
| EIP170_CODE_SIZE_LIMIT, | ||
| GAS_CODEDEPOSIT, | ||
| ) | ||
|
|
||
|
|
||
| class ShardingComputation(SpuriousDragonComputation): | ||
| def apply_message(self): | ||
| snapshot = self.vm_state.snapshot() | ||
|
|
||
| if self.msg.depth > STACK_DEPTH_LIMIT: | ||
| raise StackDepthLimit("Stack depth limit reached") | ||
|
|
||
| if self.msg.should_transfer_value and self.msg.value: | ||
| with self.vm_state.state_db() as state_db: | ||
| sender_balance = state_db.get_balance(self.msg.sender) | ||
|
|
||
| if sender_balance < self.msg.value: | ||
| raise InsufficientFunds( | ||
| "Insufficient funds: {0} < {1}".format(sender_balance, self.msg.value) | ||
| ) | ||
|
|
||
| state_db.delta_balance(self.msg.sender, -1 * self.msg.value) | ||
| state_db.delta_balance(self.msg.storage_address, self.msg.value) | ||
|
|
||
| self.logger.debug( | ||
| "TRANSFERRED: %s from %s -> %s", | ||
| self.msg.value, | ||
| encode_hex(self.msg.sender), | ||
| encode_hex(self.msg.storage_address), | ||
| ) | ||
|
|
||
| with self.vm_state.state_db() as state_db: | ||
| state_db.touch_account(self.msg.storage_address) | ||
|
|
||
| computation = self.apply_computation( | ||
| self.vm_state, | ||
| self.msg, | ||
| self.opcodes, | ||
| self.precompiles, | ||
| ) | ||
|
|
||
| if computation.is_error: | ||
| self.vm_state.revert(snapshot) | ||
| else: | ||
| self.vm_state.commit(snapshot) | ||
|
|
||
| return computation | ||
|
|
||
| def apply_create_message(self): | ||
| # Remove EIP160 nonce increment but keep EIP170 contract code size limit | ||
| snapshot = self.vm_state.snapshot() | ||
|
|
||
| computation = self.apply_message() | ||
|
|
||
| if computation.is_error: | ||
| self.vm_state.revert(snapshot) | ||
| return computation | ||
| else: | ||
| contract_code = computation.output | ||
|
|
||
| if contract_code and len(contract_code) >= EIP170_CODE_SIZE_LIMIT: | ||
| computation._error = OutOfGas( | ||
| "Contract code size exceeds EIP170 limit of {0}. Got code of " | ||
| "size: {1}".format( | ||
| EIP170_CODE_SIZE_LIMIT, | ||
| len(contract_code), | ||
| ) | ||
| ) | ||
| self.vm_state.revert(snapshot) | ||
| elif contract_code: | ||
| contract_code_gas_cost = len(contract_code) * GAS_CODEDEPOSIT | ||
| try: | ||
| computation.gas_meter.consume_gas( | ||
| contract_code_gas_cost, | ||
| reason="Write contract code for CREATE", | ||
| ) | ||
| except OutOfGas as err: | ||
| # Different from Frontier: reverts state on gas failure while | ||
| # writing contract code. | ||
| computation._error = err | ||
| self.vm_state.revert(snapshot) | ||
| else: | ||
| if self.logger: | ||
| self.logger.debug( | ||
| "SETTING CODE: %s -> length: %s | hash: %s", | ||
| encode_hex(self.msg.storage_address), | ||
| len(contract_code), | ||
| encode_hex(keccak(contract_code)) | ||
| ) | ||
|
|
||
| with self.vm_state.state_db() as state_db: | ||
| state_db.set_code(self.msg.storage_address, contract_code) | ||
| self.vm_state.commit(snapshot) | ||
| else: | ||
| self.vm_state.commit(snapshot) | ||
| return computation |