[transaction] Add transaction viewer; allow block view to enter
transaction viewmaster
Daniel Edgecumbe
7 years ago
parent
3959a2612c
commit
9cae569e8c
@ -0,0 +1,363 @@
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# Copyright (c) 2014-2017 esotericnonsense (Daniel Edgecumbe)
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or https://opensource.org/licenses/mit-license.php
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import datetime
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import curses
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import asyncio
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from macros import MIN_WINDOW_SIZE
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class TransactionStore(object):
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def __init__(self, client):
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self._client = client
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self._lock = asyncio.Lock()
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self._transactions = {} # txid -> raw transaction
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async def get_transaction(self, txid):
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with await self._lock:
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try:
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return self._transactions[txid]
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except KeyError:
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# TODO: handle error if the transaction doesn't exist at all.
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j = await self._client.request("getrawtransaction", [txid, True])
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self._transactions[txid] = j["result"]
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return j["result"]
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class TransactionView(object):
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def __init__(self, transactionstore):
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self._transactionstore = transactionstore
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self._pad = None
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self._visible = False
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self._txid = None # currently browsed txid.
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self._selected_input = None # (index, txid)
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self._input_offset = None # (offset, txid)
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self._selected_output = None # (index, txid)
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self._output_offset = None # (offset, txid)
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self._window_size = MIN_WINDOW_SIZE
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async def _set_txid(self, txid, vout=None):
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# TODO: lock?
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self._txid = txid
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self._selected_input = (0, txid)
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self._input_offset = (0, txid)
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if vout is not None: # A specific input was selected, go there.
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self._selected_output = (vout, txid)
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self._output_offset = (vout, txid)
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else:
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self._selected_output = (0, txid)
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self._output_offset = (0, txid)
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async def set_txid(self, txid):
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# Externally setting vout is not permitted/necessary.
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await self._set_txid(txid)
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async def _draw_transaction(self, transaction):
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CGREEN = curses.color_pair(1)
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CRED = curses.color_pair(3)
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CYELLOW = curses.color_pair(5)
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CBOLD = curses.A_BOLD
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self._pad.addstr(0, 1, "time {}".format(
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datetime.datetime.utcfromtimestamp(transaction["time"]).isoformat(timespec="seconds")
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), CBOLD)
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self._pad.addstr(1, 1, "size {}b".format(transaction["size"]), CBOLD)
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self._pad.addstr(1, 15, "vsize {}b".format(transaction["vsize"]), CBOLD)
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self._pad.addstr(2, 1, "locktime {}".format(transaction["locktime"]), CBOLD)
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self._pad.addstr(2, 23, "v{}".format(transaction["version"]), CBOLD)
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self._pad.addstr(0, 31, "txid {}".format(transaction["txid"]), CBOLD)
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self._pad.addstr(1, 31, "hash {}".format(transaction["hash"]), CBOLD)
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if "blockhash" in transaction:
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self._pad.addstr(2, 30, "block {}".format(transaction["blockhash"]), CBOLD)
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else:
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self._pad.addstr(2, 58, "unconfirmed transaction!", CBOLD + CRED)
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# height and weight would be nice.
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# neither are directly accessible.
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async def _draw_inputs(self, transaction):
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CGREEN = curses.color_pair(1)
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CRED = curses.color_pair(3)
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CYELLOW = curses.color_pair(5)
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CBOLD = curses.A_BOLD
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CREVERSE = curses.A_REVERSE
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self._pad.addstr(4, 1, "Inputs: {}".format(len(transaction["vin"])), CRED + CBOLD)
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self._pad.addstr(4, 68, "[UP/DOWN: browse, ENTER: select]", CYELLOW)
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if self._selected_input is None or self._input_offset is None:
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# Shouldn't happen
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raise Exception
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if self._selected_input[1] != transaction["txid"] or self._input_offset[1] != transaction["txid"]:
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# Shouldn't happen
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raise Exception
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offset = self._input_offset[0]
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if offset > 0:
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self._pad.addstr(5, 36, "... ^ ...", CRED + CBOLD)
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if offset < len(transaction["vin"]) - 5:
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self._pad.addstr(11, 36, "... v ...", CRED + CBOLD)
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for i, inp in enumerate(transaction["vin"]):
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if i < offset: # this is lazy
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continue
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if i > offset+4: # this is lazy
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break
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# Sequence numbers, perhaps?
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if "coinbase" in inp:
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inputstr = inp["coinbase"][:76]
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else:
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inputstr = "{:05d} {}:{:05d}".format(i, inp["txid"], inp["vout"])
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if i == self._selected_input[0] and self._txid == self._selected_input[1]:
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inputcolor = CRED + CBOLD + CREVERSE
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else:
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inputcolor = CRED
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self._pad.addstr(6+i-offset, 24, inputstr, inputcolor)
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async def _draw_outputs(self, transaction):
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# TODO: can we reuse code from _draw_inputs?
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CGREEN = curses.color_pair(1)
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CRED = curses.color_pair(3)
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CYELLOW = curses.color_pair(5)
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CBOLD = curses.A_BOLD
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CREVERSE = curses.A_REVERSE
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self._pad.addstr(12, 1, "[PGUP/PGDN: browse]", CYELLOW)
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out_total = sum(out["value"] for out in transaction["vout"])
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self._pad.addstr(12, 64, "Outputs: {: 5d} ({: 15.8f} BTC)".format(len(transaction["vout"]), out_total), CGREEN + CBOLD)
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if self._selected_output is None or self._output_offset is None:
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# Shouldn't happen
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raise Exception
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if self._selected_output[1] != transaction["txid"] or self._output_offset[1] != transaction["txid"]:
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# Shouldn't happen
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raise Exception
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offset = self._output_offset[0]
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if offset > 0:
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self._pad.addstr(13, 36, "... ^ ...", CGREEN + CBOLD)
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if offset < len(transaction["vout"]) - 5:
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self._pad.addstr(19, 36, "... v ...", CGREEN + CBOLD)
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for i, out in enumerate(transaction["vout"]):
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if i < offset: # this is lazy
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continue
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if i > offset+4: # this is lazy
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break
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# A 1 million BTC output would be rather surprising. Pad to six.
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spk = out["scriptPubKey"]
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if "addresses" in spk:
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outstring = " ".join(spk["addresses"])[:80]
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elif "asm" in spk:
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outstring = spk["asm"][:80]
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else:
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outstring = "???"
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if i == self._selected_output[0] and self._txid == self._selected_output[1]:
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outputcolor = CGREEN + CBOLD + CREVERSE
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else:
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outputcolor = CGREEN
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self._pad.addstr(14+i-offset, 1, "{:05d} {} {: 15.8f} BTC".format(i, outstring, out["value"]), outputcolor)
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async def _draw(self, transaction):
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# TODO: figure out window width etc.
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if self._pad is not None:
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self._pad.clear()
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else:
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self._pad = curses.newpad(20, 100)
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if transaction:
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await self._draw_transaction(transaction)
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if "vin" in transaction:
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await self._draw_inputs(transaction)
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if "vout" in transaction:
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await self._draw_outputs(transaction)
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await self._draw_pad_to_screen()
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async def _draw_pad_to_screen(self):
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maxy, maxx = self._window_size
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if maxy < 8 or maxx < 3:
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return # Can't do it
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self._pad.refresh(0, 0, 4, 0, min(maxy-3, 24), min(maxx-1, 100))
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async def _select_previous_input(self):
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if self._txid is None:
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return # Can't do anything
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if self._selected_input == None or self._selected_input[1] != self._txid:
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return # Can't do anything
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if self._input_offset == None or self._input_offset[1] != self._txid:
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return # Can't do anything
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if self._selected_input[0] == 0:
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return # At the beginning already.
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if self._selected_input[0] == self._input_offset[0]:
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self._input_offset = (self._input_offset[0] - 1, self._input_offset[1])
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self._selected_input = (self._selected_input[0] - 1, self._selected_input[1])
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await self.draw()
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async def _select_next_input(self):
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if self._txid is None:
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return # Can't do anything
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if self._selected_input == None or self._selected_input[1] != self._txid:
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return # Can't do anything
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if self._input_offset == None or self._input_offset[1] != self._txid:
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return # Can't do anything
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try:
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transaction = await self._transactionstore.get_transaction(self._txid)
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except KeyError:
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return # Can't do anything
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if self._selected_input[0] == len(transaction["vin"]) - 1:
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return # At the end already
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if self._selected_input[0] == self._input_offset[0] + 4:
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self._input_offset = (self._input_offset[0] + 1, self._input_offset[1])
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self._selected_input = (self._selected_input[0] + 1, self._selected_input[1])
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await self.draw()
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async def _select_input_as_transaction(self):
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if self._txid is None:
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return # Can't do anything
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if self._selected_input == None or self._selected_input[1] != self._txid:
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return # Can't do anything
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if self._input_offset == None or self._input_offset[1] != self._txid:
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return # This shouldn't matter, but skip anyway
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try:
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transaction = await self._transactionstore.get_transaction(self._txid)
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except KeyError:
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return # Can't do anything
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inp = transaction["vin"][self._selected_input[0]]
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# Sequence numbers, perhaps?
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if "coinbase" in inp:
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return # Can't do anything
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else:
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await self._set_txid(inp["txid"], vout=inp["vout"])
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await self.draw()
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async def _select_previous_output(self):
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if self._txid is None:
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return # Can't do anything
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if self._selected_output == None or self._selected_output[1] != self._txid:
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return # Can't do anything
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if self._output_offset == None or self._output_offset[1] != self._txid:
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return # Can't do anything
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if self._selected_output[0] == 0:
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return # At the beginning already.
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if self._selected_output[0] == self._output_offset[0]:
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self._output_offset = (self._output_offset[0] - 1, self._output_offset[1])
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self._selected_output = (self._selected_output[0] - 1, self._selected_output[1])
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await self.draw()
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async def _select_next_output(self):
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if self._txid is None:
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return # Can't do anything
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if self._selected_output == None or self._selected_output[1] != self._txid:
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return # Can't do anything
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if self._output_offset == None or self._output_offset[1] != self._txid:
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return # Can't do anything
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try:
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transaction = await self._transactionstore.get_transaction(self._txid)
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except KeyError:
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return # Can't do anything
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if self._selected_output[0] == len(transaction["vout"]) - 1:
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return # At the end already
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if self._selected_output[0] == self._output_offset[0] + 4:
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self._output_offset = (self._output_offset[0] + 1, self._output_offset[1])
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self._selected_output = (self._selected_output[0] + 1, self._selected_output[1])
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await self.draw()
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async def draw(self):
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if not self._visible:
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return
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transaction = None
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if self._txid:
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transaction = await self._transactionstore.get_transaction(self._txid)
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await self._draw(transaction)
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async def on_mode_change(self, newmode):
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if newmode != "transaction":
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self._visible = False
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return
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self._visible = True
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await self.draw()
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async def on_window_resize(self, y, x):
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# At the moment we ignore the x size and limit to 100.
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self._window_size = (y, x)
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if self._visible:
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await self.draw()
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async def handle_keypress(self, key):
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assert self._visible
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if key == "KEY_UP":
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await self._select_previous_input()
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return None
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if key == "KEY_DOWN":
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await self._select_next_input()
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return None
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if key.lower() == "j" or key == "KEY_PPAGE":
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await self._select_previous_output()
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return None
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if key.lower() == "k" or key == "KEY_NPAGE":
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await self._select_next_output()
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return None
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if key == "KEY_RETURN" or key == "\n":
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await self._select_input_as_transaction()
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return None
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raise Exception(key)
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return key
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