54 lines
1.9 KiB
Python
54 lines
1.9 KiB
Python
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
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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
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def claim_id_hash(tx_hash, n):
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return hash160(tx_hash + struct.pack('>I', n))
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class Input(BaseInput):
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script_class = InputScript
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class Output(BaseOutput):
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script_class = OutputScript
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@classmethod
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def pay_claim_name_pubkey_hash(cls, amount, claim_name, claim, pubkey_hash):
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script = cls.script_class.pay_claim_name_pubkey_hash(claim_name, claim, pubkey_hash)
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return cls(amount, script)
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class Transaction(BaseTransaction):
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input_class = Input
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output_class = Output
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def get_claim_id(self, output_index):
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output = self.outputs[output_index] # type: Output
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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
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def claim(cls, name, meta, amount, holding_address, funding_accounts, change_account):
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# type: (bytes, ClaimDict, int, bytes, List[BaseAccount], BaseAccount) -> defer.Deferred
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ledger = cls.ensure_all_have_same_ledger(funding_accounts, change_account)
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claim_output = Output.pay_claim_name_pubkey_hash(
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amount, name, hexlify(meta.serialized), ledger.address_to_hash160(holding_address)
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)
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return cls.pay([claim_output], funding_accounts, change_account)
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@classmethod
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def abandon(cls, utxo, funding_accounts, change_account):
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# type: (Output, List[BaseAccount], BaseAccount) -> defer.Deferred
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return cls.liquidate([utxo], funding_accounts, change_account)
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