359 lines
12 KiB
Python
359 lines
12 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2012 thomasv@gitorious
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import re
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import decimal
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from decimal import Decimal
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from typing import NamedTuple, Sequence, Optional, List, TYPE_CHECKING
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from PyQt5.QtGui import QFontMetrics, QFont
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from PyQt5.QtWidgets import QApplication
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from electrum import bitcoin
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from electrum.util import bfh, parse_max_spend, FailedToParsePaymentIdentifier
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from electrum.transaction import PartialTxOutput
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from electrum.bitcoin import opcodes, construct_script
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from electrum.logging import Logger
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from electrum.lnurl import LNURLError
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from .qrtextedit import ScanQRTextEdit
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from .completion_text_edit import CompletionTextEdit
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from . import util
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from .util import MONOSPACE_FONT
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if TYPE_CHECKING:
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from .main_window import ElectrumWindow
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from .send_tab import SendTab
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RE_ALIAS = r'(.*?)\s*\<([0-9A-Za-z]{1,})\>'
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frozen_style = "QWidget {border:none;}"
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normal_style = "QPlainTextEdit { }"
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class PayToLineError(NamedTuple):
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line_content: str
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exc: Exception
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idx: int = 0 # index of line
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is_multiline: bool = False
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class PayToEdit(CompletionTextEdit, ScanQRTextEdit, Logger):
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def __init__(self, send_tab: 'SendTab'):
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CompletionTextEdit.__init__(self)
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ScanQRTextEdit.__init__(self, config=send_tab.config, setText=self._on_input_btn)
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Logger.__init__(self)
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self.send_tab = send_tab
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self.win = send_tab.window
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self.app = QApplication.instance()
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self.amount_edit = self.send_tab.amount_e
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self.setFont(QFont(MONOSPACE_FONT))
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document = self.document()
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document.contentsChanged.connect(self.update_size)
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fontMetrics = QFontMetrics(document.defaultFont())
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self.fontSpacing = fontMetrics.lineSpacing()
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margins = self.contentsMargins()
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documentMargin = document.documentMargin()
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self.verticalMargins = margins.top() + margins.bottom()
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self.verticalMargins += self.frameWidth() * 2
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self.verticalMargins += documentMargin * 2
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self.heightMin = self.fontSpacing + self.verticalMargins
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self.heightMax = (self.fontSpacing * 10) + self.verticalMargins
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self.c = None
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self.addPasteButton(setText=self._on_input_btn)
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self.textChanged.connect(self._on_text_changed)
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self.outputs = [] # type: List[PartialTxOutput]
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self.errors = [] # type: List[PayToLineError]
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self.disable_checks = False
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self.is_alias = False
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self.update_size()
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self.payto_scriptpubkey = None # type: Optional[bytes]
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self.lightning_invoice = None
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self.previous_payto = ''
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def setFrozen(self, b):
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self.setReadOnly(b)
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self.setStyleSheet(frozen_style if b else normal_style)
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self.overlay_widget.setHidden(b)
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def setTextNoCheck(self, text: str):
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"""Sets the text, while also ensuring the new value will not be resolved/checked."""
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self.previous_payto = text
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self.setText(text)
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def do_clear(self):
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self.disable_checks = False
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self.is_alias = False
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self.setText('')
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self.setFrozen(False)
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self.setEnabled(True)
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def setGreen(self):
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self.setStyleSheet(util.ColorScheme.GREEN.as_stylesheet(True))
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def setExpired(self):
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self.setStyleSheet(util.ColorScheme.RED.as_stylesheet(True))
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def parse_address_and_amount(self, line) -> PartialTxOutput:
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try:
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x, y = line.split(',')
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except ValueError:
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raise Exception("expected two comma-separated values: (address, amount)") from None
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scriptpubkey = self.parse_output(x)
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amount = self.parse_amount(y)
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return PartialTxOutput(scriptpubkey=scriptpubkey, value=amount)
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def parse_output(self, x) -> bytes:
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try:
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address = self.parse_address(x)
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return bfh(bitcoin.address_to_script(address))
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except Exception:
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pass
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try:
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script = self.parse_script(x)
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return bfh(script)
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except Exception:
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pass
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raise Exception("Invalid address or script.")
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def parse_script(self, x):
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script = ''
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for word in x.split():
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if word[0:3] == 'OP_':
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opcode_int = opcodes[word]
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script += construct_script([opcode_int])
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else:
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bfh(word) # to test it is hex data
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script += construct_script([word])
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return script
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def parse_amount(self, x):
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x = x.strip()
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if not x:
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raise Exception("Amount is empty")
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if parse_max_spend(x):
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return x
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p = pow(10, self.amount_edit.decimal_point())
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try:
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return int(p * Decimal(x))
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except decimal.InvalidOperation:
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raise Exception("Invalid amount")
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def parse_address(self, line):
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r = line.strip()
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m = re.match('^'+RE_ALIAS+'$', r)
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address = str(m.group(2) if m else r)
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assert bitcoin.is_address(address)
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return address
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def _on_input_btn(self, text: str):
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self.setText(text)
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self._check_text(full_check=True)
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def _on_text_changed(self):
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if self.app.clipboard().text() == self.toPlainText():
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# user likely pasted from clipboard
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self._check_text(full_check=True)
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else:
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self._check_text(full_check=False)
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def on_timer_check_text(self):
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if self.hasFocus():
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return
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self._check_text(full_check=True)
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def _check_text(self, *, full_check: bool):
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if self.previous_payto == str(self.toPlainText()).strip():
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return
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if full_check:
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self.previous_payto = str(self.toPlainText()).strip()
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self.errors = []
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if self.disable_checks:
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return
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# filter out empty lines
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lines = [i for i in self.lines() if i]
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self.payto_scriptpubkey = None
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self.lightning_invoice = None
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self.outputs = []
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if len(lines) == 1:
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data = lines[0]
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try:
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self.send_tab.handle_payment_identifier(data, can_use_network=full_check)
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except LNURLError as e:
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self.logger.exception("")
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self.send_tab.show_error(e)
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except FailedToParsePaymentIdentifier:
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pass
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else:
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return
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# try "address, amount" on-chain format
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try:
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self._parse_as_multiline(lines, raise_errors=True)
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except Exception as e:
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pass
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else:
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return
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# try address/script
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try:
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self.payto_scriptpubkey = self.parse_output(data)
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except Exception as e:
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self.errors.append(PayToLineError(line_content=data, exc=e))
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else:
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self.send_tab.set_onchain(True)
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self.send_tab.lock_amount(False)
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return
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if full_check: # network requests # FIXME blocking GUI thread
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# try openalias
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oa_data = self._resolve_openalias(data)
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if oa_data:
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self._set_openalias(key=data, data=oa_data)
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return
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else:
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# there are multiple lines
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self._parse_as_multiline(lines, raise_errors=False)
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def _parse_as_multiline(self, lines, *, raise_errors: bool):
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outputs = [] # type: List[PartialTxOutput]
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total = 0
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is_max = False
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for i, line in enumerate(lines):
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try:
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output = self.parse_address_and_amount(line)
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except Exception as e:
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if raise_errors:
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raise
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else:
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self.errors.append(PayToLineError(
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idx=i, line_content=line.strip(), exc=e, is_multiline=True))
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continue
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outputs.append(output)
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if parse_max_spend(output.value):
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is_max = True
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else:
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total += output.value
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if outputs:
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self.send_tab.set_onchain(True)
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self.send_tab.max_button.setChecked(is_max)
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self.outputs = outputs
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self.payto_scriptpubkey = None
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if self.send_tab.max_button.isChecked():
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self.send_tab.spend_max()
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else:
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self.amount_edit.setAmount(total if outputs else None)
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self.send_tab.lock_amount(self.send_tab.max_button.isChecked() or bool(outputs))
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def get_errors(self) -> Sequence[PayToLineError]:
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return self.errors
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def get_destination_scriptpubkey(self) -> Optional[bytes]:
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return self.payto_scriptpubkey
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def get_outputs(self, is_max: bool) -> List[PartialTxOutput]:
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if self.payto_scriptpubkey:
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if is_max:
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amount = '!'
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else:
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amount = self.amount_edit.get_amount()
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if amount is None:
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return []
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self.outputs = [PartialTxOutput(scriptpubkey=self.payto_scriptpubkey, value=amount)]
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return self.outputs[:]
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def lines(self):
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return self.toPlainText().split('\n')
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def is_multiline(self):
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return len(self.lines()) > 1
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def paytomany(self):
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self.setTextNoCheck("\n\n\n")
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self.update_size()
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def update_size(self):
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docLineCount = self.document().lineCount()
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if self.cursorRect().right() + 1 >= self.overlay_widget.pos().x():
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# Add a line if we are under the overlay widget
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docLineCount += 1
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docHeight = docLineCount * self.fontSpacing
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h = docHeight + self.verticalMargins
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h = min(max(h, self.heightMin), self.heightMax)
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self.setMinimumHeight(int(h))
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self.setMaximumHeight(int(h))
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self.verticalScrollBar().setHidden(docHeight + self.verticalMargins < self.heightMax)
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# The scrollbar visibility can have changed so we update the overlay position here
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self._updateOverlayPos()
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def _resolve_openalias(self, text: str) -> Optional[dict]:
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key = text
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key = key.strip() # strip whitespaces
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if not (('.' in key) and ('<' not in key) and (' ' not in key)):
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return None
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parts = key.split(sep=',') # assuming single line
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if parts and len(parts) > 0 and bitcoin.is_address(parts[0]):
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return None
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try:
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data = self.win.contacts.resolve(key)
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except Exception as e:
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self.logger.info(f'error resolving address/alias: {repr(e)}')
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return None
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return data or None
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def _set_openalias(self, *, key: str, data: dict) -> bool:
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self.is_alias = True
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self.setFrozen(True)
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key = key.strip() # strip whitespaces
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address = data.get('address')
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name = data.get('name')
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new_url = key + ' <' + address + '>'
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self.setTextNoCheck(new_url)
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#if self.win.config.get('openalias_autoadd') == 'checked':
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self.win.contacts[key] = ('openalias', name)
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self.win.contact_list.update()
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if data.get('type') == 'openalias':
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self.validated = data.get('validated')
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if self.validated:
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self.setGreen()
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else:
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self.setExpired()
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else:
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self.validated = None
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return True
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