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91 lines
3.3 KiB
Python
91 lines
3.3 KiB
Python
import binascii
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from hashlib import sha256
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from pisa import logging, bitcoin_cli
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from pisa.utils.auth_proxy import JSONRPCException
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class BlockProcessor:
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@staticmethod
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def get_block(block_hash):
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block = None
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try:
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block = bitcoin_cli.getblock(block_hash)
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except JSONRPCException as e:
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logging.error("[BlockProcessor] couldn't get block from bitcoind. Error code {}".format(e))
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return block
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@staticmethod
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def get_best_block_hash():
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block_hash = None
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try:
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block_hash = bitcoin_cli.getbestblockhash()
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except JSONRPCException as e:
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logging.error("[BlockProcessor] couldn't get block hash. Error code {}".format(e))
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return block_hash
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@staticmethod
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def get_potential_matches(txids, locator_uuid_map):
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potential_locators = {sha256(binascii.unhexlify(txid)).hexdigest(): txid for txid in txids}
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# Check is any of the tx_ids in the received block is an actual match
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intersection = set(locator_uuid_map.keys()).intersection(potential_locators.keys())
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potential_matches = {locator: potential_locators[locator] for locator in intersection}
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if len(potential_matches) > 0:
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logging.info("[BlockProcessor] list of potential matches: {}".format(potential_matches))
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else:
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logging.info("[BlockProcessor] no potential matches found")
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@staticmethod
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def get_matches(potential_matches, locator_uuid_map, appointments):
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matches = []
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for locator, dispute_txid in potential_matches.items():
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for uuid in locator_uuid_map[locator]:
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try:
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# ToDo: #20-test-tx-decrypting-edge-cases
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justice_rawtx = appointments[uuid].encrypted_blob.decrypt(binascii.unhexlify(dispute_txid))
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justice_rawtx = binascii.hexlify(justice_rawtx).decode()
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justice_txid = bitcoin_cli.decoderawtransaction(justice_rawtx).get('txid')
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matches.append((locator, uuid, dispute_txid, justice_txid, justice_rawtx))
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logging.info("[BlockProcessor] match found for locator {} (uuid: {}): {}".format(
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locator, uuid, justice_txid))
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except JSONRPCException as e:
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# Tx decode failed returns error code -22, maybe we should be more strict here. Leaving it simple
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# for the POC
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logging.error("[BlockProcessor] can't build transaction from decoded data. Error code {}".format(e))
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return matches
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@staticmethod
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def check_confirmations(txs, unconfirmed_txs, tx_job_map, missed_confirmations):
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for tx in txs:
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if tx in tx_job_map and tx in unconfirmed_txs:
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unconfirmed_txs.remove(tx)
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logging.info("[Responder] confirmation received for tx {}".format(tx))
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elif tx in unconfirmed_txs:
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if tx in missed_confirmations:
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missed_confirmations[tx] += 1
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else:
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missed_confirmations[tx] = 1
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logging.info("[Responder] tx {} missed a confirmation (total missed: {})"
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.format(tx, missed_confirmations[tx]))
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return unconfirmed_txs, missed_confirmations
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