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-WIP-electrum-btcp
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Capital gains: Let user enter fiat value of transactions.

This commit is contained in:
ThomasV 2018-02-11 17:26:13 +01:00
parent f8df8d60c4
commit 4cbdd25c93
2 changed files with 81 additions and 18 deletions
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34
gui/qt/history_list.py
View File

@ -63,6 +63,7 @@ class HistoryList(MyTreeWidget, AcceptFileDragDrop):
if fx and fx.show_history():
headers.extend(['%s '%fx.ccy + _('Amount'), '%s '%fx.ccy + _('Balance')])
headers.extend(['%s '%fx.ccy + _('Capital Gains')])
self.editable_columns.extend([6])
self.update_headers(headers)
def get_domain(self):
@ -87,14 +88,20 @@ class HistoryList(MyTreeWidget, AcceptFileDragDrop):
balance_str = self.parent.format_amount(balance, whitespaces=True)
label = self.wallet.get_label(tx_hash)
entry = ['', tx_hash, status_str, label, v_str, balance_str]
fiat_value = None
if fx and fx.show_history():
date = timestamp_to_datetime(time.time() if conf <= 0 else timestamp)
for amount in [value, balance]:
text = fx.historical_value_str(amount, date)
entry.append(text)
fiat_value = self.wallet.get_fiat_value(tx_hash, fx.ccy)
if not fiat_value:
value_str = fx.historical_value_str(value, date)
else:
value_str = str(fiat_value)
entry.append(value_str)
balance_str = fx.historical_value_str(balance, date)
entry.append(balance_str)
# fixme: should use is_mine
if value < 0:
cg = self.wallet.capital_gain(tx_hash, self.parent.fx.timestamp_rate)
cg = self.wallet.capital_gain(tx_hash, fx.timestamp_rate, fx.ccy)
entry.append("%.2f"%cg if cg is not None else _('No data'))
item = QTreeWidgetItem(entry)
item.setIcon(0, icon)
@ -109,12 +116,27 @@ class HistoryList(MyTreeWidget, AcceptFileDragDrop):
if value and value < 0:
item.setForeground(3, QBrush(QColor("#BC1E1E")))
item.setForeground(4, QBrush(QColor("#BC1E1E")))
if fiat_value:
item.setForeground(6, QBrush(QColor("#1E1EFF")))
if tx_hash:
item.setData(0, Qt.UserRole, tx_hash)
self.insertTopLevelItem(0, item)
if current_tx == tx_hash:
self.setCurrentItem(item)
def on_edited(self, item, column, prior):
'''Called only when the text actually changes'''
key = item.data(0, Qt.UserRole)
text = item.text(column)
# fixme
if column == 3:
self.parent.wallet.set_label(key, text)
self.update_labels()
self.parent.update_completions()
elif column == 6:
self.parent.wallet.set_fiat_value(key, self.parent.fx.ccy, text)
self.on_update()
def on_doubleclick(self, item, column):
if self.permit_edit(item, column):
super(HistoryList, self).on_doubleclick(item, column)
@ -170,8 +192,8 @@ class HistoryList(MyTreeWidget, AcceptFileDragDrop):
menu.addAction(_("Remove"), lambda: self.remove_local_tx(tx_hash))
menu.addAction(_("Copy {}").format(column_title), lambda: self.parent.app.clipboard().setText(column_data))
if column in self.editable_columns:
menu.addAction(_("Edit {}").format(column_title), lambda: self.editItem(item, column))
for c in self.editable_columns:
menu.addAction(_("Edit {}").format(self.headerItem().text(c)), lambda: self.editItem(item, c))
menu.addAction(_("Details"), lambda: self.parent.show_transaction(tx))

65
lib/wallet.py
View File

@ -185,6 +185,7 @@ class Abstract_Wallet(PrintError):
self.labels = storage.get('labels', {})
self.frozen_addresses = set(storage.get('frozen_addresses',[]))
self.history = storage.get('addr_history',{}) # address -> list(txid, height)
self.fiat_value = storage.get('fiat_value', {})
self.load_keystore()
self.load_addresses()
@ -342,13 +343,37 @@ class Abstract_Wallet(PrintError):
if old_text:
self.labels.pop(name)
changed = True
if changed:
run_hook('set_label', self, name, text)
self.storage.put('labels', self.labels)
return changed
def set_fiat_value(self, txid, ccy, text):
if txid not in self.transactions:
return
if not text:
d = self.fiat_value.get(ccy, {})
if d and txid in d:
d.pop(txid)
else:
return
else:
try:
Decimal(text)
except:
return
if ccy not in self.fiat_value:
self.fiat_value[ccy] = {}
self.fiat_value[ccy][txid] = text
self.storage.put('fiat_value', self.fiat_value)
def get_fiat_value(self, txid, ccy):
fiat_value = self.fiat_value.get(ccy, {}).get(txid)
try:
return Decimal(fiat_value)
except:
return
def is_mine(self, address):
return address in self.get_addresses()
@ -1597,33 +1622,49 @@ class Abstract_Wallet(PrintError):
return v
raise BaseException('unknown txin value')
def capital_gain(self, txid, price_func):
def price_at_timestamp(self, txid, price_func):
height, conf, timestamp = self.get_tx_height(txid)
return price_func(timestamp)
def capital_gain(self, txid, price_func, ccy):
"""
Difference between the fiat price of coins leaving the wallet because of transaction txid,
and the price of these coins when they entered the wallet.
price_func: function that returns the fiat price given a timestamp
"""
height, conf, timestamp = self.get_tx_height(txid)
tx = self.transactions[txid]
out_value = sum([ (value if not self.is_mine(address) else 0) for otype, address, value in tx.outputs() ])
ir, im, v, fee = self.get_wallet_delta(tx)
out_value = -v
fiat_value = self.get_fiat_value(txid, ccy)
if fiat_value is None:
p = self.price_at_timestamp(txid, price_func)
liquidation_price = None if p is None else out_value/Decimal(COIN) * p
else:
liquidation_price = - fiat_value
try:
return out_value/Decimal(COIN) * (price_func(timestamp) - self.average_price(tx, price_func))
return liquidation_price - out_value/Decimal(COIN) * self.average_price(tx, price_func, ccy)
except:
return None
def average_price(self, tx, price_func):
def average_price(self, tx, price_func, ccy):
""" average price of the inputs of a transaction """
return sum(self.coin_price(txin, price_func) * self.txin_value(txin) for txin in tx.inputs()) / sum(self.txin_value(txin) for txin in tx.inputs())
input_value = sum(self.txin_value(txin) for txin in tx.inputs()) / Decimal(COIN)
total_price = sum(self.coin_price(txin, price_func, ccy, self.txin_value(txin)) for txin in tx.inputs())
return total_price / input_value
def coin_price(self, coin, price_func):
def coin_price(self, coin, price_func, ccy, txin_value):
""" fiat price of acquisition of coin """
txid = coin['prevout_hash']
tx = self.transactions[txid]
if all([self.is_mine(txin['address']) for txin in tx.inputs()]):
return self.average_price(tx, price_func)
return self.average_price(tx, price_func, ccy) * txin_value/Decimal(COIN)
elif all([ not self.is_mine(txin['address']) for txin in tx.inputs()]):
height, conf, timestamp = self.get_tx_height(txid)
return price_func(timestamp)
fiat_value = self.get_fiat_value(txid, ccy)
if fiat_value is not None:
return fiat_value
else:
return self.price_at_timestamp(txid, price_func) * txin_value/Decimal(COIN)
else:
# could be some coinjoin transaction..
return None