def find_all_valid_decks(provider: Provider, deck_version: int,
prod: bool=True) -> Generator:
'''
Scan the blockchain for PeerAssets decks, returns list of deck objects.
: provider - provider instance
: version - deck protocol version (0, 1, 2, ...)
: test True/False - test or production P2TH
'''
pa_params = param_query(provider.network)
if prod:
p2th = pa_params.P2TH_addr
else:
p2th = pa_params.test_P2TH_addr
if isinstance(provider, RpcNode):
deck_spawns = (provider.getrawtransaction(i, 1)
for i in find_deck_spawns(provider))
else:
try:
deck_spawns = (provider.getrawtransaction(i, 1) for i in
provider.listtransactions(p2th))
except TypeError as err: # it will except if no transactions are found on this P2TH
raise EmptyP2THDirectory(err)
with concurrent.futures.ThreadPoolExecutor(max_workers=2) as th:
for result in th.map(deck_parser, ((provider, rawtx, deck_version, p2th) for rawtx in deck_spawns)):
if result:
yield result
def find_tx_sender(provider: Provider, raw_tx: dict) -> str:
'''find transaction sender, vin[0] is used in this case.'''
vin = raw_tx["vin"][0]
txid = vin["txid"]
index = vin["vout"]
return provider.getrawtransaction(txid, 1)["vout"][index]["scriptPubKey"]["addresses"][0]
def find_card_bundles(provider: Provider, deck: Deck) -> Optional[Iterator]:
'''each blockchain transaction can contain multiple cards,
wrapped in bundles. This method finds and returns those bundles.'''
if isinstance(provider, RpcNode):
if deck.id is None:
raise Exception("deck.id required to listtransactions")
p2th_account = provider.getaccount(deck.p2th_address)
batch_data = [('getrawtransaction', [i["txid"], 1])
for i in provider.listtransactions(p2th_account)]
result = provider.batch(batch_data)
if result is not None:
raw_txns = [i['result'] for i in result if result]
else:
raise EmptyP2THDirectory({'error': 'No cards found on this deck.'})
else:
if deck.p2th_address is None:
raise Exception("deck.p2th_address required to listtransactions")
try:
raw_txns = (provider.getrawtransaction(i, 1)
for i in provider.listtransactions(deck.p2th_address))
except TypeError:
raise EmptyP2THDirectory({'error': 'No cards found on this deck.'})
return (card_bundler(provider, deck, i) for i in raw_txns)
def find_parent_outputs(provider: Provider, utxo: TxIn) -> TxOut:
'''due to design of the btcpy library, TxIn object must be converted to TxOut object before signing'''
network_params = net_query(provider.network)
index = utxo.txout # utxo index
return TxOut.from_json(provider.getrawtransaction(utxo.txid,
1)['vout'][index],
network=network_params)
def get_card_transfer(provider: Provider,
deck: Deck,
txid: str,
debug: bool = False) -> Iterator:
'''get a single card transfer by it's id'''
rawtx = provider.getrawtransaction(txid, 1)
bundle = card_bundler(provider, deck, rawtx)
return card_bundle_parser(bundle, debug)
def find_deck(provider: Provider, key: str, version: int, prod: bool=True) -> Optional[Deck]:
'''Find specific deck by deck id.'''
pa_params = param_query(provider.network)
if prod:
p2th = pa_params.P2TH_addr
else:
p2th = pa_params.test_P2TH_addr
rawtx = provider.getrawtransaction(key, 1)
deck = deck_parser((provider, rawtx, 1, p2th))
return deck
def find_vote_casts(provider: Provider, vote: Vote,
choice_index: int) -> Iterable[VoteCast]:
'''find and verify vote_casts on this vote_choice_address'''
vote_casts = provider.listtransactions(
vote.vote_choice_address[choice_index])
for tx in vote_casts:
raw_tx = provider.getrawtransaction(tx, 1)
sender = find_tx_sender(provider, raw_tx)
confirmations = raw_tx["confirmations"]
blocknum = provider.getblock(raw_tx["blockhash"])["height"]
yield VoteCast(vote, sender, blocknum, confirmations,
raw_tx["blocktime"])
def find_vote_inits(provider: Provider, deck: Deck) -> Iterable[Vote]:
'''find vote_inits on this deck'''
vote_ints = provider.listtransactions(deck_vote_tag(deck))
for txid in vote_ints:
try:
raw_vote = provider.getrawtransaction(txid)
vote = parse_vote_info(read_tx_opreturn(raw_vote))
vote["vote_id"] = txid
vote["sender"] = find_tx_sender(provider, raw_vote)
vote["deck"] = deck
yield Vote(**vote)
except AssertionError:
pass
def find_card_bundles(provider: Provider, deck: Deck) -> Optional[Iterator]:
'''each blockchain transaction can contain multiple cards,
wrapped in bundles. This method finds and returns those bundles.'''
if isinstance(provider, RpcNode):
if deck.id is None:
raise Exception("deck.id required to listtransactions")
batch_data = [('getrawtransaction', [i["txid"], 1]) for
i in provider.listtransactions(deck.id)]
result = provider.batch(batch_data)
if result is not None:
raw_txns = [i['result'] for i in result if result]
else:
raise EmptyP2THDirectory({'error': 'No cards found on this deck.'})
else:
if deck.p2th_address is None:
raise Exception("deck.p2th_address required to listtransactions")
try:
raw_txns = (provider.getrawtransaction(i, 1) for i in
provider.listtransactions(deck.p2th_address))
except TypeError:
raise EmptyP2THDirectory({'error': 'No cards found on this deck.'})
return (CardBundle(deck=deck,
blockhash=i['blockhash'],
txid=i['txid'],
timestamp=i['time'],
blockseq=tx_serialization_order(provider, i["blockhash"],
i["txid"]),
blocknum=provider.getblock(i["blockhash"])["height"],
sender=find_tx_sender(provider, i),
vouts=i['vout'],
tx_confirmations=i['confirmations']
) for i in raw_txns)
def get_card_transfers(provider: Provider, deck: Deck) -> Generator:
'''get all <deck> card transfers, if cards match the protocol'''
if isinstance(provider, RpcNode):
if deck.id is None:
raise Exception("deck.id required to listtransactions")
batch_data = [('getrawtransaction', [i["txid"], 1])
for i in provider.listtransactions(deck.id)]
result = provider.batch(batch_data)
if result is not None:
card_transfers = [i['result'] for i in result if result]
else:
if deck.p2th_address is None:
raise Exception("deck.p2th_address required to listtransactions")
if provider.listtransactions(deck.p2th_address):
card_transfers = (provider.getrawtransaction(
i, 1) for i in provider.listtransactions(deck.p2th_address))
else:
raise EmptyP2THDirectory({'error': 'No cards found on this deck.'})
def card_parser(args: Tuple[Provider, Deck, dict]) -> list:
'''this function wraps all the card transfer parsing'''
provider = args[0]
deck = args[1]
raw_tx = args[2]
try:
validate_card_transfer_p2th(deck, raw_tx) # validate P2TH first
card_metainfo = parse_card_transfer_metainfo(
read_tx_opreturn(raw_tx), deck.version)
vouts = raw_tx["vout"]
sender = find_tx_sender(provider, raw_tx)
try: # try to get block seq number
blockseq = tx_serialization_order(provider,
raw_tx["blockhash"],
raw_tx["txid"])
except KeyError:
blockseq = 0
try: # try to get block number of block when this tx was written
blocknum = provider.getblock(raw_tx["blockhash"])["height"]
except KeyError:
blocknum = 0
try: # try to get tx confirmation count
tx_confirmations = raw_tx["confirmations"]
except KeyError:
tx_confirmations = 0
cards = postprocess_card(card_metainfo, raw_tx, sender, vouts,
blockseq, blocknum, tx_confirmations,
deck)
cards = [CardTransfer(**card) for card in cards]
except (InvalidCardTransferP2TH, CardVersionMismatch,
CardNumberOfDecimalsMismatch, InvalidVoutOrder,
RecieverAmountMismatch, DecodeError, TypeError,
InvalidNulldataOutput) as e:
return []
return cards
with concurrent.futures.ThreadPoolExecutor(max_workers=2) as th:
for result in th.map(card_parser,
((provider, deck, i) for i in card_transfers)):
if result:
yield result