def __getitem__(self, hash_and_pc):
res = self.txos.get_by_hash(_hash(hash_and_pc))
if not res:
raise KeyError(hash_and_pc)
utxo = IOput()
utxo.deserialize(res)
return utxo
def remove(self, n):
self.commitments.remove(n)
ser_removed_outputs = self.txos.remove(n)
removed_outputs = []
for _ser in ser_removed_outputs:
utxo = IOput()
utxo.deserialize(_ser)
removed_outputs.append(utxo)
return removed_outputs
def find(self, hash_and_pc):
'''
In contrast with __getitem__ find will try to find even spent
outputs for other (syncing) nodes.
'''
res = self.txos.find_by_hash(_hash(hash_and_pc))
if not res:
raise KeyError(hash_and_pc)
utxo = IOput()
utxo.deserialize(res)
return utxo
def rollback(self, pruned_inputs, num_of_added_outputs, prev_state):
for r_i in pruned_inputs:
if self.storage_space.utxo_index:
#r_i[0][2] is serialized txo (0 is txo, 2 is serialized object)
utxo = IOput()
utxo.deserialize(r_i[0][2])
self.storage_space.utxo_index.add_utxo(utxo)
self.confirmed.unspend(r_i)
outputs_for_mempool = self.confirmed.remove(num_of_added_outputs)
for _o in outputs_for_mempool:
self.mempool[_o.serialized_index] = _o
self.storage_space.utxo_index.remove_utxo(_o)
self.confirmed.set_state(prev_state)
