def Asset_Create(self, engine):
tx = engine.ScriptContainer
asset_type = int(engine.EvaluationStack.Pop().GetBigInteger())
if asset_type not in AssetType.AllTypes() or \
asset_type == AssetType.CreditFlag or \
asset_type == AssetType.DutyFlag or \
asset_type == AssetType.GoverningToken or \
asset_type == AssetType.UtilityToken:
return False
if len(engine.EvaluationStack.Peek().GetByteArray()) > 1024:
return False
name = engine.EvaluationStack.Pop().GetByteArray().decode('utf-8')
amount = Fixed8(engine.EvaluationStack.Pop().GetBigInteger())
if amount == Fixed8.Zero() or amount < Fixed8.NegativeSatoshi():
return False
if asset_type == AssetType.Invoice and amount != Fixed8.NegativeSatoshi(
):
return False
precision = int(engine.EvaluationStack.Pop().GetBigInteger())
if precision > 8:
return False
if asset_type == AssetType.Share and precision != 0:
return False
if amount != Fixed8.NegativeSatoshi() and amount.value % pow(
10, 8 - precision) != 0:
return False
ownerData = engine.EvaluationStack.Pop().GetByteArray()
owner = ECDSA.decode_secp256r1(ownerData, unhex=False).G
if owner.IsInfinity:
return False
if not self.CheckWitnessPubkey(engine, owner):
logger.error("check witness false...")
return False
admin = UInt160(data=engine.EvaluationStack.Pop().GetByteArray())
issuer = UInt160(data=engine.EvaluationStack.Pop().GetByteArray())
new_asset = AssetState(asset_id=tx.Hash,
asset_type=asset_type,
name=name,
amount=amount,
available=Fixed8.Zero(),
precision=precision,
fee_mode=0,
fee=Fixed8.Zero(),
fee_addr=UInt160(),
owner=owner,
admin=admin,
issuer=issuer,
expiration=Blockchain.Default().Height + 1 +
2000000,
is_frozen=False)
asset = self._assets.GetOrAdd(tx.Hash.ToBytes(), new_asset)
# print("*****************************************************")
# print("CREATED ASSET %s " % tx.Hash.ToBytes())
# print("*****************************************************")
engine.EvaluationStack.PushT(StackItem.FromInterface(asset))
return True
def Persist(self, block):
self._persisting_block = block
sn = self._db.snapshot()
accounts = DBCollection(self._db, sn, DBPrefix.ST_Account, AccountState)
unspentcoins = DBCollection(self._db, sn, DBPrefix.ST_Coin, UnspentCoinState)
spentcoins = DBCollection(self._db, sn, DBPrefix.ST_SpentCoin, SpentCoinState)
assets = DBCollection(self._db, sn, DBPrefix.ST_Asset, AssetState)
validators = DBCollection(self._db, sn, DBPrefix.ST_Validator, ValidatorState)
contracts = DBCollection(self._db, sn, DBPrefix.ST_Contract, ContractState)
storages = DBCollection(self._db, sn, DBPrefix.ST_Storage, StorageItem)
amount_sysfee = self.GetSysFeeAmount(block.PrevHash) + block.TotalFees().value
amount_sysfee_bytes = amount_sysfee.to_bytes(8, 'little')
to_dispatch = []
with self._db.write_batch() as wb:
wb.put(DBPrefix.DATA_Block + block.Hash.ToBytes(), amount_sysfee_bytes + block.Trim())
for tx in block.Transactions:
wb.put(DBPrefix.DATA_Transaction + tx.Hash.ToBytes(), block.IndexBytes() + tx.ToArray())
# go through all outputs and add unspent coins to them
unspentcoinstate = UnspentCoinState.FromTXOutputsConfirmed(tx.outputs)
unspentcoins.Add(tx.Hash.ToBytes(), unspentcoinstate)
# go through all the accounts in the tx outputs
for output in tx.outputs:
account = accounts.GetAndChange(output.AddressBytes, AccountState(output.ScriptHash))
if account.HasBalance(output.AssetId):
account.AddToBalance(output.AssetId, output.Value)
else:
account.SetBalanceFor(output.AssetId, output.Value)
# go through all tx inputs
unique_tx_input_hashes = []
for input in tx.inputs:
if input.PrevHash not in unique_tx_input_hashes:
unique_tx_input_hashes.append(input.PrevHash)
for txhash in unique_tx_input_hashes:
prevTx, height = self.GetTransaction(txhash.ToBytes())
coin_refs_by_hash = [coinref for coinref in tx.inputs if
coinref.PrevHash.ToBytes() == txhash.ToBytes()]
for input in coin_refs_by_hash:
uns = unspentcoins.GetAndChange(input.PrevHash.ToBytes())
uns.OrEqValueForItemAt(input.PrevIndex, CoinState.Spent)
if prevTx.outputs[input.PrevIndex].AssetId.ToBytes() == Blockchain.SystemShare().Hash.ToBytes():
sc = spentcoins.GetAndChange(input.PrevHash.ToBytes(),
SpentCoinState(input.PrevHash, height, []))
sc.Items.append(SpentCoinItem(input.PrevIndex, block.Index))
output = prevTx.outputs[input.PrevIndex]
acct = accounts.GetAndChange(prevTx.outputs[input.PrevIndex].AddressBytes,
AccountState(output.ScriptHash))
assetid = prevTx.outputs[input.PrevIndex].AssetId
acct.SubtractFromBalance(assetid, prevTx.outputs[input.PrevIndex].Value)
# do a whole lotta stuff with tx here...
if tx.Type == TransactionType.RegisterTransaction:
asset = AssetState(tx.Hash, tx.AssetType, tx.Name, tx.Amount,
Fixed8(0), tx.Precision, Fixed8(0), Fixed8(0), UInt160(data=bytearray(20)),
tx.Owner, tx.Admin, tx.Admin, block.Index + 2 * 2000000, False)
assets.Add(tx.Hash.ToBytes(), asset)
elif tx.Type == TransactionType.IssueTransaction:
txresults = [result for result in tx.GetTransactionResults() if result.Amount.value < 0]
for result in txresults:
asset = assets.GetAndChange(result.AssetId.ToBytes())
asset.Available = asset.Available - result.Amount
elif tx.Type == TransactionType.ClaimTransaction:
for input in tx.Claims:
sc = spentcoins.TryGet(input.PrevHash.ToBytes())
if sc and sc.HasIndex(input.PrevIndex):
sc.DeleteIndex(input.PrevIndex)
spentcoins.GetAndChange(input.PrevHash.ToBytes())
elif tx.Type == TransactionType.EnrollmentTransaction:
newvalidator = ValidatorState(pub_key=tx.PublicKey)
validators.GetAndChange(tx.PublicKey.ToBytes(), newvalidator)
elif tx.Type == TransactionType.StateTransaction:
# @TODO Implement persistence for State Descriptors
pass
elif tx.Type == TransactionType.PublishTransaction:
contract = ContractState(tx.Code, tx.NeedStorage, tx.Name, tx.CodeVersion,
tx.Author, tx.Email, tx.Description)
contracts.GetAndChange(tx.Code.ScriptHash().ToBytes(), contract)
elif tx.Type == TransactionType.InvocationTransaction:
script_table = CachedScriptTable(contracts)
service = StateMachine(accounts, validators, assets, contracts, storages, wb)
engine = ApplicationEngine(
trigger_type=TriggerType.Application,
container=tx,
table=script_table,
service=service,
gas=tx.Gas,
testMode=False
)
engine.LoadScript(tx.Script, False)
try:
success = engine.Execute()
service.ExecutionCompleted(engine, success)
except Exception as e:
service.ExecutionCompleted(engine, False, e)
to_dispatch = to_dispatch + service.events_to_dispatch
else:
if tx.Type != b'\x00' and tx.Type != 128:
logger.info("TX Not Found %s " % tx.Type)
# do save all the accounts, unspent, coins, validators, assets, etc
# now sawe the current sys block
# filter out accounts to delete then commit
for key, account in accounts.Current.items():
if not account.IsFrozen and len(account.Votes) == 0 and account.AllBalancesZeroOrLess():
accounts.Remove(key)
accounts.Commit(wb)
# filte out unspent coins to delete then commit
for key, unspent in unspentcoins.Current.items():
if unspent.IsAllSpent:
unspentcoins.Remove(key)
unspentcoins.Commit(wb)
# filter out spent coins to delete then commit to db
for key, spent in spentcoins.Current.items():
if len(spent.Items) == 0:
spentcoins.Remove(key)
spentcoins.Commit(wb)
# commit validators
validators.Commit(wb)
# commit assets
assets.Commit(wb)
# commit contracts
contracts.Commit(wb)
sn.close()
wb.put(DBPrefix.SYS_CurrentBlock, block.Hash.ToBytes() + block.IndexBytes())
self._current_block_height = block.Index
self._persisting_block = None
self.TXProcessed += len(block.Transactions)
for event in to_dispatch:
events.emit(event.event_type, event)
def Persist(self, block):
accounts = DBCollection(self._db, DBPrefix.ST_Account, AccountState)
unspentcoins = DBCollection(self._db, DBPrefix.ST_Coin,
UnspentCoinState)
spentcoins = DBCollection(self._db, DBPrefix.ST_SpentCoin,
SpentCoinState)
assets = DBCollection(self._db, DBPrefix.ST_Asset, AssetState)
validators = DBCollection(self._db, DBPrefix.ST_Validator,
ValidatorState)
contracts = DBCollection(self._db, DBPrefix.ST_Contract, ContractState)
storages = DBCollection(self._db, DBPrefix.ST_Storage, StorageItem)
amount_sysfee = self.GetSysFeeAmount(
block.PrevHash) + block.TotalFees().value
amount_sysfee_bytes = amount_sysfee.to_bytes(8, 'little')
with self._db.write_batch() as wb:
for tx in block.Transactions:
unspentcoinstate = UnspentCoinState.FromTXOutputsConfirmed(
tx.outputs)
unspentcoins.Add(tx.Hash.ToBytes(), unspentcoinstate)
# go through all the accounts in the tx outputs
for output in tx.outputs:
account = accounts.GetAndChange(
output.AddressBytes, AccountState(output.ScriptHash))
if account.HasBalance(output.AssetId):
account.AddToBalance(output.AssetId, output.Value)
else:
account.SetBalanceFor(output.AssetId, output.Value)
# go through all tx inputs
unique_tx_input_hashes = []
for input in tx.inputs:
if input.PrevHash not in unique_tx_input_hashes:
unique_tx_input_hashes.append(input.PrevHash)
for txhash in unique_tx_input_hashes:
prevTx, height = self.GetTransaction(txhash.ToBytes())
coin_refs_by_hash = [
coinref for coinref in tx.inputs
if coinref.PrevHash.ToBytes() == txhash.ToBytes()
]
for input in coin_refs_by_hash:
uns = unspentcoins.GetAndChange(
input.PrevHash.ToBytes())
uns.OrEqValueForItemAt(input.PrevIndex,
CoinState.Spent)
if prevTx.outputs[input.PrevIndex].AssetId.ToBytes(
) == Blockchain.SystemShare().Hash.ToBytes():
sc = spentcoins.GetAndChange(
input.PrevHash.ToBytes(),
SpentCoinState(input.PrevHash, height, []))
sc.Items.append(
SpentCoinItem(input.PrevIndex, block.Index))
output = prevTx.outputs[input.PrevIndex]
acct = accounts.GetAndChange(
prevTx.outputs[input.PrevIndex].AddressBytes,
AccountState(output.ScriptHash))
assetid = prevTx.outputs[input.PrevIndex].AssetId
acct.SubtractFromBalance(
assetid, prevTx.outputs[input.PrevIndex].Value)
# do a whole lotta stuff with tx here...
if tx.Type == TransactionType.RegisterTransaction:
asset = AssetState(tx.Hash, tx.AssetType, tx.Name,
tx.Amount, Fixed8(0), tx.Precision,
Fixed8(0), Fixed8(0),
UInt160(data=bytearray(20)), tx.Owner,
tx.Admin, tx.Admin,
block.Index + 2 * 2000000, False)
assets.Add(tx.Hash.ToBytes(), asset)
elif tx.Type == TransactionType.IssueTransaction:
txresults = [
result for result in tx.GetTransactionResults()
if result.Amount.value < 0
]
for result in txresults:
asset = assets.GetAndChange(result.AssetId.ToBytes())
asset.Available = asset.Available - result.Amount
elif tx.Type == TransactionType.ClaimTransaction:
for input in tx.Claims:
sc = spentcoins.TryGet(input.PrevHash.ToBytes())
if sc and sc.HasIndex(input.PrevIndex):
sc.DeleteIndex(input.PrevIndex)
spentcoins.GetAndChange(input.PrevHash.ToBytes())
elif tx.Type == TransactionType.EnrollmentTransaction:
validator = validators.GetAndChange(
tx.PublicKey, ValidatorState(pub_key=tx.PublicKey))
# logger.info("VALIDATOR %s " % validator.ToJson())
elif tx.Type == TransactionType.StateTransaction:
# @TODO Implement persistence for State Descriptors
pass
elif tx.Type == TransactionType.PublishTransaction:
contract = ContractState(tx.Code, tx.NeedStorage, tx.Name,
tx.CodeVersion, tx.Author,
tx.Email, tx.Description)
contracts.GetAndChange(tx.Code.ScriptHash().ToBytes(),
contract)
elif tx.Type == TransactionType.InvocationTransaction:
script_table = CachedScriptTable(contracts)
service = StateMachine(accounts,
validators,
assets,
contracts,
storages,
wb=wb)
engine = ApplicationEngine(
trigger_type=TriggerType.Application,
container=tx,
table=script_table,
service=service,
gas=tx.Gas,
testMode=True)
engine.LoadScript(tx.Script)
# normally, this function does not return true/false
# for testing purposes, we try to execute and if an exception is raised
# we will return false, otherwise if success return true
# this is different than the 'success' bool returned by engine.Execute()
# the 'success' bool returned by engine.Execute() is a value indicating
# wether or not the invocation was successful, and if so, we then commit
# the changes made by the contract to the database
try:
success = engine.Execute()
# service.ExecutionCompleted(engine, success)
return True
except Exception as e:
# service.ExecutionCompleted(self, False, e)
return False
def Persist(self, block):
start = time.clock()
sn = self._db.snapshot()
accounts = DBCollection(self._db, sn, DBPrefix.ST_Account, AccountState)
unspentcoins = DBCollection(self._db, sn, DBPrefix.ST_Coin, UnspentCoinState)
spentcoins = DBCollection(self._db, sn, DBPrefix.ST_SpentCoin, SpentCoinState)
assets = DBCollection(self._db, sn, DBPrefix.ST_Asset, AssetState)
validators = DBCollection(self._db, sn, DBPrefix.ST_Validator, ValidatorState)
contracts = DBCollection(self._db, sn, DBPrefix.ST_Contract, ContractState)
storages = DBCollection(self._db, sn, DBPrefix.ST_Storage, StorageItem)
amount_sysfee = self.GetSysFeeAmount(block.PrevHash) + block.TotalFees().value
amount_sysfee_bytes = amount_sysfee.to_bytes(8, 'little')
self.__log.debug("[BlockFee] : %s %s " % (block.Index, amount_sysfee))
try:
with self._db.write_batch() as wb:
wb.put(DBPrefix.DATA_Block + block.Hash.ToBytes(), amount_sysfee_bytes + block.Trim())
for tx in block.Transactions:
wb.put(DBPrefix.DATA_Transaction + tx.Hash.ToBytes(), block.IndexBytes() + tx.ToArray())
# go through all outputs and add unspent coins to them
unspentcoinstate = UnspentCoinState.FromTXOutputsConfirmed(tx.outputs)
unspentcoins.Add(tx.Hash.ToBytes(), unspentcoinstate)
# go through all the accounts in the tx outputs
for output in tx.outputs:
account = accounts.GetAndChange(output.AddressBytes, AccountState(output.ScriptHash))
if account.HasBalance(output.AssetId):
account.AddToBalance(output.AssetId, output.Value)
else:
account.SetBalanceFor(output.AssetId, output.Value)
# go through all tx inputs
unique_tx_input_hashes = []
for input in tx.inputs:
if input.PrevHash not in unique_tx_input_hashes:
unique_tx_input_hashes.append(input.PrevHash)
for txhash in unique_tx_input_hashes:
prevTx, height = self.GetTransaction(txhash.ToBytes())
coin_refs_by_hash = [coinref for coinref in tx.inputs if coinref.PrevHash.ToBytes() == txhash.ToBytes()]
for input in coin_refs_by_hash:
uns = unspentcoins.GetAndChange(input.PrevHash.ToBytes())
uns.OrEqValueForItemAt(input.PrevIndex, CoinState.Spent)
if prevTx.outputs[input.PrevIndex].AssetId.ToBytes() == Blockchain.SystemShare().Hash.ToBytes():
sc = spentcoins.GetAndChange(input.PrevHash.ToBytes(), SpentCoinState(input.PrevHash, height, []))
sc.Items.append(SpentCoinItem(input.PrevIndex, block.Index))
output = prevTx.outputs[input.PrevIndex]
acct = accounts.GetAndChange(prevTx.outputs[input.PrevIndex].AddressBytes, AccountState(output.ScriptHash))
assetid = prevTx.outputs[input.PrevIndex].AssetId
acct.SubtractFromBalance(assetid, prevTx.outputs[input.PrevIndex].Value)
# do a whole lotta stuff with tx here...
if tx.Type == TransactionType.RegisterTransaction:
asset = AssetState(tx.Hash, tx.AssetType, tx.Name, tx.Amount,
Fixed8(0), tx.Precision, Fixed8(0), Fixed8(0), UInt160(data=bytearray(20)),
tx.Owner, tx.Admin, tx.Admin, block.Index + 2 * 2000000, False)
assets.Add(tx.Hash.ToBytes(), asset)
elif tx.Type == TransactionType.IssueTransaction:
txresults = [result for result in tx.GetTransactionResults() if result.Amount.value < 0]
for result in txresults:
asset = assets.GetAndChange(result.AssetId.ToBytes())
asset.Available = asset.Available - result.Amount
elif tx.Type == TransactionType.ClaimTransaction:
for input in tx.Claims:
sc = spentcoins.TryGet(input.PrevHash.ToBytes())
if sc and sc.HasIndex(input.PrevIndex):
sc.DeleteIndex(input.PrevIndex)
spentcoins.GetAndChange(input.PrevHash.ToBytes())
elif tx.Type == TransactionType.EnrollmentTransaction:
newvalidator = ValidatorState(pub_key=tx.PublicKey)
validators.GetAndChange(tx.PublicKey.ToBytes(), newvalidator)
elif tx.Type == TransactionType.PublishTransaction:
contract = ContractState(tx.Code, tx.NeedStorage, tx.Name, tx.CodeVersion,
tx.Author, tx.Email, tx.Description)
contracts.GetAndChange(tx.Code.ScriptHash().ToBytes(), contract)
elif tx.Type == TransactionType.InvocationTransaction:
# print("RUNNING INVOCATION TRASACTION!!!!!! %s %s " % (block.Index, tx.Hash.ToBytes()))
print("[neo.Implementations.Blockchains.LevelDBBlockchain.PersistBlock: Invoke tx] -> index, tx hash %s %s " % (block.Index, tx.Hash.ToBytes()))
script_table = CachedScriptTable(contracts)
service = StateMachine(accounts, validators, assets, contracts, storages, wb)
engine = ApplicationEngine(
trigger_type=TriggerType.Application,
container=tx,
table=script_table,
service=service,
gas=tx.Gas,
testMode=False
)
engine.LoadScript(tx.Script, False)
try:
# drum roll?
success = engine.Execute()
print("[neo.Implementations.Blockchains.LevelDBBlockchain.PersistBlock: engine execute] -> Success")
if success:
service.Commit()
if len(service.notifications) > 0:
for n in service.notifications:
self.OnNotify(n)
for item in engine.EvaluationStack.Items:
print("[neo.Implementations.Blockchains.LevelDBBlockchain.PersistBlock: engine execute result] -> %s " % item)
except Exception as e:
print("[neo.Implementations.Blockchains.LevelDBBlockchain.PersistBlock: engine execute result] Could not execute smart contract. See logs for more details. %s " % e)
else:
if tx.Type != b'\x00' and tx.Type != 128:
self.__log.debug("TX Not Found %s " % tx.Type)
# do save all the accounts, unspent, coins, validators, assets, etc
# now sawe the current sys block
# filter out accounts to delete then commit
for key, account in accounts.Current.items():
if not account.IsFrozen and len(account.Votes) == 0 and account.AllBalancesZeroOrLess():
accounts.Remove(key)
accounts.Commit(wb)
# filte out unspent coins to delete then commit
for key, unspent in unspentcoins.Current.items():
unspentcoins.Remove(key)
unspentcoins.Commit(wb)
# filter out spent coins to delete then commit to db
for key, spent in spentcoins.Current.items():
if len(spent.Items) == 0:
spentcoins.Remove(key)
spentcoins.Commit(wb)
# commit validators
validators.Commit(wb)
# commit assets
assets.Commit(wb)
# commit contracts
contracts.Commit(wb)
# commit storages ( not implemented )
storages.Commit(wb)
sn.close()
wb.put(DBPrefix.SYS_CurrentBlock, block.Hash.ToBytes() + block.IndexBytes())
self._current_block_height = block.Index
end = time.clock()
self.__log.debug("PERSISTING BLOCK %s (cache) %s %s " % (block.Index, len(self._block_cache), end - start))
except Exception as e:
print("couldnt persist block %s " % e)
def MonkeyPatchPersist(self, block, snapshot=None):
if snapshot is None:
snapshot = self._db.createSnapshot()
snapshot.PersistingBlock = block
amount_sysfee = self.GetSysFeeAmount(
block.PrevHash) + (block.TotalFees().value / Fixed8.D)
amount_sysfee_bytes = struct.pack("<d", amount_sysfee)
with self._db.getBatch() as wb:
for tx in block.Transactions:
unspentcoinstate = UnspentCoinState.FromTXOutputsConfirmed(
tx.outputs)
snapshot.UnspentCoins.Add(tx.Hash.ToBytes(), unspentcoinstate)
# go through all the accounts in the tx outputs
for output in tx.outputs:
account = snapshot.Accounts.GetAndChange(
output.AddressBytes,
lambda: AccountState(output.ScriptHash))
if account.HasBalance(output.AssetId):
account.AddToBalance(output.AssetId, output.Value)
else:
account.SetBalanceFor(output.AssetId, output.Value)
# go through all tx inputs
unique_tx_input_hashes = []
for input in tx.inputs:
if input.PrevHash not in unique_tx_input_hashes:
unique_tx_input_hashes.append(input.PrevHash)
for txhash in unique_tx_input_hashes:
prevTx, height = self.GetTransaction(txhash.ToBytes())
coin_refs_by_hash = [
coinref for coinref in tx.inputs
if coinref.PrevHash.ToBytes() == txhash.ToBytes()
]
for input in coin_refs_by_hash:
snapshot.UnspentCoins.GetAndChange(
input.PrevHash.ToBytes()).Items[
input.PrevIndex] |= CoinState.Spent
if prevTx.outputs[input.PrevIndex].AssetId.ToBytes(
) == Blockchain.SystemShare().Hash.ToBytes():
sc = snapshot.SpentCoins.GetAndChange(
input.PrevHash.ToBytes(),
lambda: SpentCoinState(input.PrevHash, height, []))
sc.Items.append(
SpentCoinItem(input.PrevIndex, block.Index))
output = prevTx.outputs[input.PrevIndex]
acct = snapshot.Accounts.GetAndChange(
prevTx.outputs[input.PrevIndex].AddressBytes,
lambda: AccountState(output.ScriptHash))
assetid = prevTx.outputs[input.PrevIndex].AssetId
acct.SubtractFromBalance(
assetid, prevTx.outputs[input.PrevIndex].Value)
# do a whole lotta stuff with tx here...
if tx.Type == TransactionType.RegisterTransaction:
asset = AssetState(tx.Hash, tx.AssetType, tx.Name, tx.Amount,
Fixed8(0), tx.Precision,
Fixed8(0), Fixed8(0),
UInt160(data=bytearray(20)), tx.Owner,
tx.Admin, tx.Admin,
block.Index + 2 * 2000000, False)
snapshot.Assets.Add(tx.Hash.ToBytes(), asset)
elif tx.Type == TransactionType.IssueTransaction:
txresults = [
result for result in tx.GetTransactionResults()
if result.Amount.value < 0
]
for result in txresults:
asset = snapshot.Assets.GetAndChange(
result.AssetId.ToBytes())
asset.Available = asset.Available - result.Amount
elif tx.Type == TransactionType.ClaimTransaction:
for input in tx.Claims:
sc = snapshot.SpentCoins.TryGet(input.PrevHash.ToBytes())
if sc and sc.HasIndex(input.PrevIndex):
sc.DeleteIndex(input.PrevIndex)
snapshot.SpentCoins.GetAndChange(
input.PrevHash.ToBytes())
elif tx.Type == TransactionType.EnrollmentTransaction:
snapshot.Validators.GetAndChange(
tx.PublicKey.ToBytes(),
lambda: ValidatorState(pub_key=tx.PublicKey))
# logger.info("VALIDATOR %s " % validator.ToJson())
elif tx.Type == TransactionType.StateTransaction:
# @TODO Implement persistence for State Descriptors
pass
elif tx.Type == TransactionType.PublishTransaction:
def create_contract_state():
return ContractState(tx.Code, tx.NeedStorage, tx.Name,
tx.CodeVersion, tx.Author, tx.Email,
tx.Description)
snapshot.Contracts.GetAndChange(tx.Code.ScriptHash().ToBytes(),
create_contract_state)
elif tx.Type == TransactionType.InvocationTransaction:
return ApplicationEngine.Run(TriggerType.Application, tx,
snapshot.Clone(), tx.Gas, True,
wb)
def Persist(self, block):
sn = self._db.snapshot()
accounts = DBCollection(self._db, sn, DBPrefix.ST_Account, AccountState)
unspentcoins = DBCollection(self._db, sn, DBPrefix.ST_Coin, UnspentCoinState)
spentcoins = DBCollection(self._db, sn, DBPrefix.ST_SpentCoin, SpentCoinState)
assets = DBCollection(self._db, sn, DBPrefix.ST_Asset, AssetState)
validators = DBCollection(self._db, sn, DBPrefix.ST_Validator, ValidatorState)
contracts = DBCollection(self._db, sn, DBPrefix.ST_Contract, ContractState)
storages = DBCollection(self._db, sn, DBPrefix.ST_Storage, StorageItem)
amount_sysfee = self.GetSysFeeAmount(block.PrevHash) + block.TotalFees().value
amount_sysfee_bytes = amount_sysfee.to_bytes(8, 'little')
with self._db.write_batch() as wb:
for tx in block.Transactions:
unspentcoinstate = UnspentCoinState.FromTXOutputsConfirmed(tx.outputs)
unspentcoins.Add(tx.Hash.ToBytes(), unspentcoinstate)
# go through all the accounts in the tx outputs
for output in tx.outputs:
account = accounts.GetAndChange(output.AddressBytes, AccountState(output.ScriptHash))
if account.HasBalance(output.AssetId):
account.AddToBalance(output.AssetId, output.Value)
else:
account.SetBalanceFor(output.AssetId, output.Value)
# go through all tx inputs
unique_tx_input_hashes = []
for input in tx.inputs:
if input.PrevHash not in unique_tx_input_hashes:
unique_tx_input_hashes.append(input.PrevHash)
for txhash in unique_tx_input_hashes:
prevTx, height = self.GetTransaction(txhash.ToBytes())
coin_refs_by_hash = [coinref for coinref in tx.inputs if
coinref.PrevHash.ToBytes() == txhash.ToBytes()]
for input in coin_refs_by_hash:
uns = unspentcoins.GetAndChange(input.PrevHash.ToBytes())
uns.OrEqValueForItemAt(input.PrevIndex, CoinState.Spent)
if prevTx.outputs[input.PrevIndex].AssetId.ToBytes() == Blockchain.SystemShare().Hash.ToBytes():
sc = spentcoins.GetAndChange(input.PrevHash.ToBytes(),
SpentCoinState(input.PrevHash, height, []))
sc.Items.append(SpentCoinItem(input.PrevIndex, block.Index))
output = prevTx.outputs[input.PrevIndex]
acct = accounts.GetAndChange(prevTx.outputs[input.PrevIndex].AddressBytes,
AccountState(output.ScriptHash))
assetid = prevTx.outputs[input.PrevIndex].AssetId
acct.SubtractFromBalance(assetid, prevTx.outputs[input.PrevIndex].Value)
# do a whole lotta stuff with tx here...
if tx.Type == TransactionType.RegisterTransaction:
asset = AssetState(tx.Hash, tx.AssetType, tx.Name, tx.Amount,
Fixed8(0), tx.Precision, Fixed8(0), Fixed8(0), UInt160(data=bytearray(20)),
tx.Owner, tx.Admin, tx.Admin, block.Index + 2 * 2000000, False)
assets.Add(tx.Hash.ToBytes(), asset)
elif tx.Type == TransactionType.IssueTransaction:
txresults = [result for result in tx.GetTransactionResults() if result.Amount.value < 0]
for result in txresults:
asset = assets.GetAndChange(result.AssetId.ToBytes())
asset.Available = asset.Available - result.Amount
elif tx.Type == TransactionType.ClaimTransaction:
for input in tx.Claims:
sc = spentcoins.TryGet(input.PrevHash.ToBytes())
if sc and sc.HasIndex(input.PrevIndex):
sc.DeleteIndex(input.PrevIndex)
spentcoins.GetAndChange(input.PrevHash.ToBytes())
elif tx.Type == TransactionType.EnrollmentTransaction:
validator = validators.GetAndChange(tx.PublicKey, ValidatorState(pub_key=tx.PublicKey))
# logger.info("VALIDATOR %s " % validator.ToJson())
elif tx.Type == TransactionType.StateTransaction:
# @TODO Implement persistence for State Descriptors
pass
elif tx.Type == TransactionType.PublishTransaction:
contract = ContractState(tx.Code, tx.NeedStorage, tx.Name, tx.CodeVersion,
tx.Author, tx.Email, tx.Description)
contracts.GetAndChange(tx.Code.ScriptHash().ToBytes(), contract)
elif tx.Type == TransactionType.InvocationTransaction:
script_table = CachedScriptTable(contracts)
service = StateMachine(accounts, validators, assets, contracts, storages, wb=wb)
engine = ApplicationEngine(
trigger_type=TriggerType.Application,
container=tx,
table=script_table,
service=service,
gas=tx.Gas,
testMode=True
)
engine.LoadScript(tx.Script, False)
# normally, this function does not return true/false
# for testing purposes, we try to execute and if an exception is raised
# we will return false, otherwise if success return true
# this is different than the 'success' bool returned by engine.Execute()
# the 'success' bool returned by engine.Execute() is a value indicating
# wether or not the invocation was successful, and if so, we then commit
# the changes made by the contract to the database
try:
success = engine.Execute()
# service.ExecutionCompleted(engine, success)
return True
except Exception as e:
# service.ExecutionCompleted(self, False, e)
return False
async def Persist(self, block):
self._persisting_block = block
snapshot = self._db.createSnapshot()
snapshot.PersistingBlock = block
amount_sysfee = self.GetSysFeeAmount(
block.PrevHash) + (block.TotalFees().value / Fixed8.D)
amount_sysfee_bytes = struct.pack("<d", amount_sysfee)
to_dispatch = []
with self._db.getBatch() as wb:
wb.put(DBPrefix.DATA_Block + block.Hash.ToBytes(),
amount_sysfee_bytes + block.Trim())
for tx_idx, tx in enumerate(block.Transactions):
with self._db.getBatch() as tx_wb:
tx_wb.put(DBPrefix.DATA_Transaction + tx.Hash.ToBytes(),
block.IndexBytes() + tx.ToArray())
# go through all outputs and add unspent coins to them
unspentcoinstate = UnspentCoinState.FromTXOutputsConfirmed(
tx.outputs)
snapshot.UnspentCoins.Add(tx.Hash.ToBytes(),
unspentcoinstate)
# go through all the accounts in the tx outputs
for output in tx.outputs:
account = snapshot.Accounts.GetAndChange(
output.AddressBytes,
lambda: AccountState(output.ScriptHash))
if account.HasBalance(output.AssetId):
account.AddToBalance(output.AssetId, output.Value)
else:
account.SetBalanceFor(output.AssetId, output.Value)
# go through all tx inputs
unique_tx_input_hashes = []
for input in tx.inputs:
if input.PrevHash not in unique_tx_input_hashes:
unique_tx_input_hashes.append(input.PrevHash)
for txhash in unique_tx_input_hashes:
prevTx, height = self.GetTransaction(txhash.ToBytes())
coin_refs_by_hash = [
coinref for coinref in tx.inputs
if coinref.PrevHash.ToBytes() == txhash.ToBytes()
]
for input in coin_refs_by_hash:
snapshot.UnspentCoins.GetAndChange(
input.PrevHash.ToBytes()).Items[
input.PrevIndex] |= CoinState.Spent
if prevTx.outputs[input.PrevIndex].AssetId.ToBytes(
) == Blockchain.SystemShare().Hash.ToBytes():
sc = snapshot.SpentCoins.GetAndChange(
input.PrevHash.ToBytes(),
lambda: SpentCoinState(
input.PrevHash, height, []))
sc.Items.append(
SpentCoinItem(input.PrevIndex,
block.Index))
output = prevTx.outputs[input.PrevIndex]
acct = snapshot.Accounts.GetAndChange(
prevTx.outputs[input.PrevIndex].AddressBytes,
lambda: AccountState(output.ScriptHash))
assetid = prevTx.outputs[input.PrevIndex].AssetId
acct.SubtractFromBalance(
assetid, prevTx.outputs[input.PrevIndex].Value)
# do a whole lotta stuff with tx here...
if tx.Type == TransactionType.RegisterTransaction:
asset = AssetState(tx.Hash, tx.AssetType, tx.Name,
tx.Amount, Fixed8(0), tx.Precision,
Fixed8(0), Fixed8(0),
UInt160(data=bytearray(20)),
tx.Owner, tx.Admin, tx.Admin,
block.Index + 2 * 2000000, False)
snapshot.Assets.Add(tx.Hash.ToBytes(), asset)
elif tx.Type == TransactionType.IssueTransaction:
txresults = [
result for result in tx.GetTransactionResults()
if result.Amount.value < 0
]
for result in txresults:
asset = snapshot.Assets.GetAndChange(
result.AssetId.ToBytes())
asset.Available = asset.Available - result.Amount
elif tx.Type == TransactionType.ClaimTransaction:
for input in tx.Claims:
sc = snapshot.SpentCoins.TryGet(
input.PrevHash.ToBytes())
if sc and sc.HasIndex(input.PrevIndex):
sc.DeleteIndex(input.PrevIndex)
snapshot.SpentCoins.GetAndChange(
input.PrevHash.ToBytes())
elif tx.Type == TransactionType.EnrollmentTransaction:
snapshot.Validators.GetAndChange(
tx.PublicKey.ToBytes(),
lambda: ValidatorState(pub_key=tx.PublicKey))
elif tx.Type == TransactionType.StateTransaction:
# @TODO Implement persistence for State Descriptors
pass
elif tx.Type == TransactionType.PublishTransaction:
def create_contract_state():
return ContractState(tx.Code, tx.NeedStorage,
tx.Name, tx.CodeVersion,
tx.Author, tx.Email,
tx.Description)
snapshot.Contracts.GetOrAdd(
tx.Code.ScriptHash().ToBytes(),
create_contract_state)
elif tx.Type == TransactionType.InvocationTransaction:
engine = ApplicationEngine(TriggerType.Application, tx,
snapshot.Clone(), tx.Gas)
engine.LoadScript(tx.Script)
try:
success = engine.Execute()
if success:
engine._Service.Commit()
engine._Service.ExecutionCompleted(
engine, success)
else:
engine._Service.ExecutionCompleted(
engine, False)
except Exception as e:
traceback.print_exc()
to_dispatch = to_dispatch + engine._Service.events_to_dispatch
await asyncio.sleep(0.001)
else:
if tx.Type != b'\x00' and tx.Type != b'\x80':
logger.info("TX Not Found %s " % tx.Type)
snapshot.Commit()
snapshot.Dispose()
wb.put(DBPrefix.SYS_CurrentBlock,
block.Hash.ToBytes() + block.IndexBytes())
self._current_block_height = block.Index
self._persisting_block = None
self.TXProcessed += len(block.Transactions)
for event in to_dispatch:
events.emit(event.event_type, event)