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482 lines
19 KiB
482 lines
19 KiB
from __future__ import (absolute_import, division, |
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print_function, unicode_literals) |
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from builtins import * # noqa: F401 |
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import abc |
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import random |
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import sys |
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from decimal import Decimal |
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from twisted.internet import reactor, task |
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|
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import jmbitcoin as btc |
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from jmclient.jsonrpc import JsonRpcConnectionError, JsonRpcError |
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from jmclient.configure import jm_single |
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from jmbase.support import get_log, jmprint |
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|
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# an inaccessible blockheight; consider rewriting in 1900 years |
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INF_HEIGHT = 10**8 |
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|
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log = get_log() |
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class BlockchainInterface(object): |
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__metaclass__ = abc.ABCMeta |
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|
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def __init__(self): |
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pass |
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def is_address_imported(self, addr): |
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try: |
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return self.rpc('getaccount', [addr]) != '' |
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except JsonRpcError: |
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return len(self.rpc('getaddressinfo', [addr])['labels']) > 0 |
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|
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@abc.abstractmethod |
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def pushtx(self, txhex): |
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"""pushes tx to the network, returns False if failed""" |
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@abc.abstractmethod |
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def query_utxo_set(self, txouts, includeconf=False): |
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""" |
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takes a utxo or a list of utxos |
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returns None if they are spend or unconfirmed |
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otherwise returns value in satoshis, address and output script |
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optionally return the coin age in number of blocks |
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""" |
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# address and output script contain the same information btw |
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@abc.abstractmethod |
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def estimate_fee_per_kb(self, N): |
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'''Use the blockchain interface to |
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get an estimate of the transaction fee per kb |
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required for inclusion in the next N blocks. |
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''' |
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|
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def fee_per_kb_has_been_manually_set(self, N): |
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'''if the 'block' target is higher than 1000, interpret it |
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as manually set fee/Kb. |
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''' |
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if N > 1000: |
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return True |
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else: |
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return False |
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class ElectrumWalletInterface(BlockchainInterface): #pragma: no cover |
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"""A pseudo-blockchain interface using the existing |
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Electrum server connection in an Electrum wallet. |
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Usage requires calling set_wallet with a valid Electrum |
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wallet instance. |
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""" |
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def __init__(self, testnet=False): |
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super(ElectrumWalletInterface, self).__init__() |
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self.last_sync_unspent = 0 |
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|
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def set_wallet(self, wallet): |
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self.wallet = wallet |
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def sync_addresses(self, wallet): |
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log.debug("Dummy electrum interface, no sync address") |
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def sync_unspent(self, wallet): |
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log.debug("Dummy electrum interface, no sync unspent") |
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def pushtx(self, txhex, timeout=10): |
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#synchronous send |
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from electrum.transaction import Transaction |
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etx = Transaction(txhex) |
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etx.deserialize() |
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tx_hash = etx.hash() |
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try: |
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retval = self.wallet.network.synchronous_get( |
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('blockchain.transaction.broadcast', [str(etx)]), timeout) |
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except: |
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log.debug("Failed electrum push") |
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return False |
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if retval != tx_hash: |
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log.debug("Pushtx over Electrum returned wrong value: " + str( |
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retval)) |
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return False |
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log.debug("Pushed via Electrum successfully, hash: " + tx_hash) |
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return True |
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def query_utxo_set(self, txout, includeconf=False): |
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"""Behaves as for Core; TODO make it faster if possible. |
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Note in particular a failed connection should result in |
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a result list containing at least one "None" which the |
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caller can use as a flag for failure. |
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""" |
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self.current_height = self.wallet.network.blockchain.local_height |
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if not isinstance(txout, list): |
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txout = [txout] |
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utxos = [[t[:64], int(t[65:])] for t in txout] |
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result = [] |
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for ut in utxos: |
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address = self.wallet.network.synchronous_get(( |
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'blockchain.utxo.get_address', ut)) |
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try: |
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utxo_info = self.wallet.network.synchronous_get(( |
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"blockchain.address.listunspent", [address])) |
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except Exception as e: |
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log.debug("Got exception calling listunspent: " + repr(e)) |
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raise |
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utxo = None |
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for u in utxo_info: |
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if u['tx_hash'] == ut[0] and u['tx_pos'] == ut[1]: |
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utxo = u |
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if utxo is None: |
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result.append(None) |
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continue |
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r = { |
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'value': u['value'], |
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'address': address, |
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'script': btc.address_to_script(address) |
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} |
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if includeconf: |
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if int(u['height']) in [0, -1]: |
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#-1 means unconfirmed inputs |
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r['confirms'] = 0 |
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else: |
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#+1 because if current height = tx height, that's 1 conf |
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r['confirms'] = int(self.current_height) - int(u['height']) + 1 |
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result.append(r) |
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return result |
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def estimate_fee_per_kb(self, N): |
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if super(ElectrumWalletInterface, self).fee_per_kb_has_been_manually_set(N): |
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# use a floor of 1000 to not run into node relay problems |
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return int(max(1000, random.uniform(N * float(0.8), N * float(1.2)))) |
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fee = self.wallet.network.synchronous_get(('blockchain.estimatefee', [N] |
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)) |
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log.debug("Got fee: " + str(fee)) |
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fee_per_kb_sat = int(float(fee) * 100000000) |
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return fee_per_kb_sat |
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class BitcoinCoreInterface(BlockchainInterface): |
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def __init__(self, jsonRpc, network): |
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super(BitcoinCoreInterface, self).__init__() |
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self.jsonRpc = jsonRpc |
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blockchainInfo = self.jsonRpc.call("getblockchaininfo", []) |
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actualNet = blockchainInfo['chain'] |
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netmap = {'main': 'mainnet', 'test': 'testnet', 'regtest': 'regtest'} |
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if netmap[actualNet] != network: |
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raise Exception('wrong network configured') |
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def get_block(self, blockheight): |
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"""Returns full serialized block at a given height. |
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""" |
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block_hash = self.rpc('getblockhash', [blockheight]) |
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block = self.rpc('getblock', [block_hash, False]) |
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if not block: |
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return False |
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return block |
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def rpc(self, method, args): |
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if method not in ['importaddress', 'walletpassphrase', 'getaccount', |
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'gettransaction', 'getrawtransaction', 'gettxout', |
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'importmulti', 'listtransactions', 'getblockcount']: |
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log.debug('rpc: ' + method + " " + str(args)) |
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res = self.jsonRpc.call(method, args) |
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return res |
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def import_addresses(self, addr_list, wallet_name, restart_cb=None): |
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"""Imports addresses in a batch during initial sync. |
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Refuses to proceed if keys are found to be under control |
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of another account/label (see console output), and quits. |
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Do NOT use for in-run imports, use rpc('importaddress',..) instead. |
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""" |
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requests = [] |
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for addr in addr_list: |
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requests.append({ |
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"scriptPubKey": {"address": addr}, |
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"timestamp": 0, |
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"label": wallet_name, |
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"watchonly": True |
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}) |
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result = self.rpc('importmulti', [requests, {"rescan": False}]) |
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num_failed = 0 |
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for row in result: |
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if row['success'] == False: |
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num_failed += 1 |
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# don't try/catch, assume failure always has error message |
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log.warn(row['error']['message']) |
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if num_failed > 0: |
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fatal_msg = ("Fatal sync error: import of {} address(es) failed for " |
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"some reason. To prevent coin or privacy loss, " |
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"Joinmarket will not load a wallet in this conflicted " |
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"state. Try using a new Bitcoin Core wallet to sync this " |
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"Joinmarket wallet, or use a new Joinmarket wallet." |
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"".format(num_failed)) |
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if restart_cb: |
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restart_cb(fatal_msg) |
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else: |
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jmprint(fatal_msg, "important") |
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sys.exit(1) |
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def add_watchonly_addresses(self, addr_list, wallet_name, restart_cb=None): |
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"""For backwards compatibility, this fn name is preserved |
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as the case where we quit the program if a rescan is required; |
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but in some cases a rescan is not required (if the address is known |
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to be new/unused). For that case use import_addresses instead. |
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""" |
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self.import_addresses(addr_list, wallet_name) |
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if jm_single().config.get("BLOCKCHAIN", |
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"blockchain_source") != 'regtest': #pragma: no cover |
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#Exit conditions cannot be included in tests |
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restart_msg = ("restart Bitcoin Core with -rescan or use " |
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"`bitcoin-cli rescanblockchain` if you're " |
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"recovering an existing wallet from backup seed\n" |
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"Otherwise just restart this joinmarket application.") |
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if restart_cb: |
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restart_cb(restart_msg) |
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else: |
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jmprint(restart_msg, "important") |
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sys.exit(0) |
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def _yield_transactions(self, wallet_name): |
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batch_size = 1000 |
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iteration = 0 |
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while True: |
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new = self.rpc( |
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'listtransactions', |
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["*", batch_size, iteration * batch_size, True]) |
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for tx in new: |
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yield tx |
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if len(new) < batch_size: |
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return |
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iteration += 1 |
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def get_deser_from_gettransaction(self, rpcretval): |
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"""Get full transaction deserialization from a call |
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to `gettransaction` |
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""" |
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if not "hex" in rpcretval: |
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log.info("Malformed gettransaction output") |
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return None |
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#str cast for unicode |
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hexval = str(rpcretval["hex"]) |
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return btc.deserialize(hexval) |
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def list_transactions(self, num): |
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""" Return a list of the last `num` transactions seen |
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in the wallet (under any label/account). |
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""" |
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return self.rpc("listtransactions", ["*", num, 0, True]) |
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def get_transaction(self, txid): |
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""" Returns a serialized transaction for txid txid, |
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in hex as returned by Bitcoin Core rpc, or None |
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if no transaction can be retrieved. Works also for |
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watch-only wallets. |
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""" |
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#changed syntax in 0.14.0; allow both syntaxes |
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try: |
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res = self.rpc("gettransaction", [txid, True]) |
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except: |
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try: |
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res = self.rpc("gettransaction", [txid, 1]) |
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except JsonRpcError as e: |
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#This should never happen (gettransaction is a wallet rpc). |
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log.warn("Failed gettransaction call; JsonRpcError") |
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return None |
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except Exception as e: |
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log.warn("Failed gettransaction call; unexpected error:") |
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log.warn(str(e)) |
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return None |
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if "confirmations" not in res: |
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log.warning("Malformed gettx result: " + str(res)) |
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return None |
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return res |
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def pushtx(self, txhex): |
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try: |
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txid = self.rpc('sendrawtransaction', [txhex]) |
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except JsonRpcConnectionError as e: |
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log.debug('error pushing = ' + repr(e)) |
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return False |
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except JsonRpcError as e: |
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log.debug('error pushing = ' + str(e.code) + " " + str(e.message)) |
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return False |
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return True |
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def query_utxo_set(self, txout, includeconf=False, includeunconf=False): |
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"""If txout is either (a) a single string in hex encoded txid:n form, |
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or a list of the same, returns, as a list for each txout item, |
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the result of gettxout from the bitcoind rpc for those utxs; |
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if any utxo is invalid, None is returned. |
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includeconf: if this is True, the current number of confirmations |
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of the prescribed utxo is included in the returned result dict. |
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includeunconf: if True, utxos which currently have zero confirmations |
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are included in the result set. |
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If the utxo is of a non-standard type such that there is no address, |
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the address field in the dict is None. |
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""" |
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if not isinstance(txout, list): |
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txout = [txout] |
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result = [] |
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for txo in txout: |
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if len(txo) < 66: |
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result.append(None) |
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continue |
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try: |
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txo_idx = int(txo[65:]) |
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except ValueError: |
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log.warn("Invalid utxo format, ignoring: {}".format(txo)) |
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result.append(None) |
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continue |
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ret = self.rpc('gettxout', [txo[:64], txo_idx, includeunconf]) |
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if ret is None: |
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result.append(None) |
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else: |
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if ret['scriptPubKey'].get('addresses'): |
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address = ret['scriptPubKey']['addresses'][0] |
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else: |
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address = None |
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result_dict = {'value': int(Decimal(str(ret['value'])) * |
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Decimal('1e8')), |
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'address': address, |
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'script': ret['scriptPubKey']['hex']} |
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if includeconf: |
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result_dict['confirms'] = int(ret['confirmations']) |
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result.append(result_dict) |
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return result |
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def estimate_fee_per_kb(self, N): |
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if super(BitcoinCoreInterface, self).fee_per_kb_has_been_manually_set(N): |
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# use the local bitcoin core relay fee as floor to avoid relay problems |
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btc_relayfee = -1 |
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rpc_result = self.rpc('getnetworkinfo', None) |
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btc_relayfee = rpc_result.get('relayfee', btc_relayfee) |
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if btc_relayfee > 0: |
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relayfee_in_sat = int(Decimal(1e8) * Decimal(btc_relayfee)) |
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log.debug("Using this min relay fee as tx fee floor: " + str(relayfee_in_sat)) |
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return int(max(relayfee_in_sat, random.uniform(N * float(0.8), N * float(1.2)))) |
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else: # cannot get valid relayfee: fall back to 1000 sat/kbyte |
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log.debug("Using this min relay fee as tx fee floor (fallback): 1000") |
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return int(max(1000, random.uniform(N * float(0.8), N * float(1.2)))) |
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|
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# Special bitcoin core case: sometimes the highest priority |
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# cannot be estimated in that case the 2nd highest priority |
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# should be used instead of falling back to hardcoded values |
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tries = 2 if N == 1 else 1 |
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estimate = -1 |
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for i in range(tries): |
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rpc_result = self.rpc('estimatesmartfee', [N + i]) |
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estimate = rpc_result.get('feerate', estimate) |
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if estimate > 0: |
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break |
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else: # estimate <= 0 |
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return 10000 |
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return int(Decimal(1e8) * Decimal(estimate)) |
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# class for regtest chain access |
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# running on local daemon. Only |
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# to be instantiated after network is up |
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# with > 100 blocks. |
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class RegtestBitcoinCoreInterface(BitcoinCoreInterface): #pragma: no cover |
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def __init__(self, jsonRpc): |
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super(RegtestBitcoinCoreInterface, self).__init__(jsonRpc, 'regtest') |
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self.pushtx_failure_prob = 0 |
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self.tick_forward_chain_interval = -1 |
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self.absurd_fees = False |
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self.simulating = False |
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self.shutdown_signal = False |
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self.destn_addr = self.rpc("getnewaddress", []) |
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def estimate_fee_per_kb(self, N): |
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if not self.absurd_fees: |
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return super(RegtestBitcoinCoreInterface, |
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self).estimate_fee_per_kb(N) |
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else: |
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return jm_single().config.getint("POLICY", |
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"absurd_fee_per_kb") + 100 |
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def tickchain(self): |
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if self.tick_forward_chain_interval < 0: |
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log.debug('not ticking forward chain') |
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self.tickchainloop.stop() |
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return |
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if self.shutdown_signal: |
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self.tickchainloop.stop() |
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return |
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self.tick_forward_chain(1) |
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|
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def simulate_blocks(self): |
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self.tickchainloop = task.LoopingCall(self.tickchain) |
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self.tickchainloop.start(self.tick_forward_chain_interval) |
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self.simulating = True |
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def pushtx(self, txhex): |
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if self.pushtx_failure_prob != 0 and random.random() <\ |
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self.pushtx_failure_prob: |
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log.debug('randomly not broadcasting %0.1f%% of the time' % |
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(self.pushtx_failure_prob * 100)) |
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return True |
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ret = super(RegtestBitcoinCoreInterface, self).pushtx(txhex) |
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if not self.simulating and self.tick_forward_chain_interval > 0: |
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log.debug('will call tfc after ' + str(self.tick_forward_chain_interval) + ' seconds.') |
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reactor.callLater(self.tick_forward_chain_interval, |
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self.tick_forward_chain, 1) |
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return ret |
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|
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def tick_forward_chain(self, n): |
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""" |
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Special method for regtest only; |
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instruct to mine n blocks. |
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""" |
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try: |
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self.rpc('generatetoaddress', [n, self.destn_addr]) |
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except JsonRpcConnectionError: |
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#can happen if the blockchain is shut down |
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#automatically at the end of tests; this shouldn't |
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#trigger an error |
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log.debug( |
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"Failed to generate blocks, looks like the bitcoin daemon \ |
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has been shut down. Ignoring.") |
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|
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def grab_coins(self, receiving_addr, amt=50): |
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""" |
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NOTE! amt is passed in Coins, not Satoshis! |
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Special method for regtest only: |
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take coins from bitcoind's own wallet |
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and put them in the receiving addr. |
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Return the txid. |
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""" |
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if amt > 500: |
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raise Exception("too greedy") |
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""" |
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if amt > self.current_balance: |
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#mine enough to get to the reqd amt |
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reqd = int(amt - self.current_balance) |
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reqd_blocks = int(reqd/50) +1 |
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if self.rpc('setgenerate', [True, reqd_blocks]): |
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raise Exception("Something went wrong") |
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""" |
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# now we do a custom create transaction and push to the receiver |
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txid = self.rpc('sendtoaddress', [receiving_addr, amt]) |
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if not txid: |
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raise Exception("Failed to broadcast transaction") |
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# confirm |
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self.tick_forward_chain(1) |
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return txid |
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|
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def get_received_by_addr(self, addresses, query_params): |
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# NB This will NOT return coinbase coins (but wont matter in our use |
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# case). allow importaddress to fail in case the address is already |
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# in the wallet |
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res = [] |
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for address in addresses: |
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#self.rpc('importaddress', [address, 'watchonly']) |
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res.append({'address': address, |
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'balance': int(Decimal(1e8) * self.rpc( |
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'getreceivedbyaddress', [address, 0]))}) |
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return {'data': res}
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