lbry-sdk/lbrynet/wallet/transaction.py

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import struct
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from binascii import hexlify
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from typing import List # pylint: disable=unused-import
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from twisted.internet import defer # pylint: disable=unused-import
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from torba.baseaccount import BaseAccount # pylint: disable=unused-import
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from torba.basetransaction import BaseTransaction, BaseInput, BaseOutput
from torba.hash import hash160
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from lbryschema.claim import ClaimDict # pylint: disable=unused-import
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from .script import InputScript, OutputScript
def claim_id_hash(txid, n):
return hash160(txid + struct.pack('>I', n))
class Input(BaseInput):
script_class = InputScript
class Output(BaseOutput):
script_class = OutputScript
@classmethod
def pay_claim_name_pubkey_hash(cls, amount, claim_name, claim, pubkey_hash):
script = cls.script_class.pay_claim_name_pubkey_hash(claim_name, claim, pubkey_hash)
return cls(amount, script)
class Transaction(BaseTransaction):
input_class = Input
output_class = Output
def get_claim_id(self, output_index):
output = self.outputs[output_index] # type: Output
assert output.script.is_claim_name, 'Not a name claim.'
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return claim_id_hash(self.hash, output_index)
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@classmethod
def claim(cls, name, meta, amount, holding_address, funding_accounts, change_account):
# type: (bytes, ClaimDict, int, bytes, List[BaseAccount], BaseAccount) -> defer.Deferred
ledger = cls.ensure_all_have_same_ledger(funding_accounts, change_account)
claim_output = Output.pay_claim_name_pubkey_hash(
amount, name, hexlify(meta.serialized), ledger.address_to_hash160(holding_address)
)
return cls.pay([claim_output], funding_accounts, change_account)
@classmethod
def abandon(cls, utxo, funding_accounts, change_account):
# type: (Output, List[BaseAccount], BaseAccount) -> defer.Deferred
return cls.liquidate([utxo], funding_accounts, change_account)