def _make_frontier_receipt(vm_state, transaction, computation):
# Reusable for other forks
logs = [
Log(address, topics, data)
for address, topics, data
in computation.get_log_entries()
]
gas_remaining = computation.get_gas_remaining()
gas_refund = computation.get_gas_refund()
tx_gas_used = (
transaction.gas - gas_remaining
) - min(
gas_refund,
(transaction.gas - gas_remaining) // 2,
)
gas_used = vm_state.block_header.gas_used + tx_gas_used
receipt = Receipt(
state_root=vm_state.block_header.state_root,
gas_used=gas_used,
logs=logs,
)
return receipt
def hash_log_entries(log_entries):
"""
Helper function for computing the RLP hash of the logs from transaction
execution.
"""
from evm.rlp.logs import Log
logs = [Log(*entry) for entry in log_entries]
encoded_logs = rlp.encode(logs)
logs_hash = keccak(encoded_logs)
return logs_hash
def add_transaction(self, transaction, computation):
logs = [
Log(address, topics, data)
for address, topics, data
in computation.get_log_entries()
]
if computation.error:
tx_gas_used = transaction.gas
else:
gas_remaining = computation.get_gas_remaining()
gas_refund = computation.get_gas_refund()
tx_gas_used = (
transaction.gas - gas_remaining
) - min(
gas_refund,
(transaction.gas - gas_remaining) // 2,
)
gas_used = self.header.gas_used + tx_gas_used
receipt = Receipt(
state_root=computation.state_db.root_hash,
gas_used=gas_used,
logs=logs,
)
transaction_idx = len(self.transactions)
index_key = rlp.encode(transaction_idx, sedes=rlp.sedes.big_endian_int)
self.transactions.append(transaction)
self.transaction_db[index_key] = rlp.encode(transaction)
self.receipt_db[index_key] = rlp.encode(receipt)
self.bloom_filter |= receipt.bloom
self.header.transaction_root = self.transaction_db.root_hash
self.header.state_root = computation.state_db.root_hash
self.header.receipt_root = self.receipt_db.root_hash
self.header.bloom = int(self.bloom_filter)
self.header.gas_used = gas_used
return self
def make_receipt(self, transaction, computation):
logs = [
Log(address, topics, data)
for address, topics, data in computation.get_log_entries()
]
gas_remaining = computation.get_gas_remaining()
gas_refund = computation.get_gas_refund()
tx_gas_used = (transaction.gas - gas_remaining) - min(
gas_refund,
(transaction.gas - gas_remaining) // 2,
)
gas_used = self.header.gas_used + tx_gas_used
receipt = Receipt(
state_root=self.header.state_root,
gas_used=gas_used,
logs=logs,
)
return receipt
