Separate out get_input_tx.
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@ -138,6 +138,17 @@ class TrezorCompatibleWallet(BIP44_Wallet):
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msg_sig = client.sign_message('Bitcoin', address_n, message)
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return msg_sig.signature
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def get_input_tx(self, tx_hash):
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# First look up an input transaction in the wallet where it
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# will likely be. If co-signing a transaction it may not have
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# all the input txs, in which case we ask the network.
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tx = self.transactions.get(tx_hash)
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if not tx:
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request = ('blockchain.transaction.get', [tx_hash])
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# FIXME: what if offline?
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tx = Transaction(self.network.synchronous_get(request))
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return tx
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def sign_transaction(self, tx, password):
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if tx.is_complete():
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return
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@ -147,13 +158,7 @@ class TrezorCompatibleWallet(BIP44_Wallet):
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xpub_path = {}
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for txin in tx.inputs():
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tx_hash = txin['prevout_hash']
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ptx = self.transactions.get(tx_hash)
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if ptx is None:
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ptx = self.network.synchronous_get(('blockchain.transaction.get', [tx_hash]))
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ptx = Transaction(ptx)
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prev_tx[tx_hash] = ptx
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prev_tx[tx_hash] = self.get_input_tx(tx_hash)
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for x_pubkey in txin['x_pubkeys']:
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if not is_extended_pubkey(x_pubkey):
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continue
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