r1

test/functional/fake_stake/util.py

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+#!/usr/bin/env python3
+# Copyright (c) 2019 The PIVX developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+# -*- coding: utf-8 -*-
+
+import subprocess
+
+from test_framework.messages import CTransaction, CTxIn, CTxOut, COutPoint, COIN
+from test_framework.messages import msg_getheaders, msg_headers, CBlockHeader
+from test_framework.mininode import P2PInterface, mininode_lock
+from test_framework.script import CScript
+from test_framework.util import wait_until
+
+''' -------------------------------------------------------------------------
+TestNode CLASS --------------------------------------------------------------
+
+A peer we use to send messsages to agrariand and store responses
+Extends P2PInterface.
+'''
+
+# TestNode: A peer we use to send messages to bitcoind, and store responses.
+class TestNode(P2PInterface):
+    def __init__(self):
+        super().__init__()
+        self.last_sendcmpct = []
+        self.block_announced = False
+        # Store the hashes of blocks we've seen announced.
+        # This is for synchronizing the p2p message traffic,
+        # so we can eg wait until a particular block is announced.
+        self.announced_blockhashes = set()
+
+    def on_sendcmpct(self, message):
+        self.last_sendcmpct.append(message)
+
+    def on_cmpctblock(self, message):
+        self.block_announced = True
+        self.last_message["cmpctblock"].header_and_shortids.header.calc_sha256()
+        self.announced_blockhashes.add(self.last_message["cmpctblock"].header_and_shortids.header.sha256)
+
+    def on_headers(self, message):
+        self.block_announced = True
+        for x in self.last_message["headers"].headers:
+            x.calc_sha256()
+            self.announced_blockhashes.add(x.sha256)
+
+    def on_inv(self, message):
+        for x in self.last_message["inv"].inv:
+            if x.type == 2:
+                self.block_announced = True
+                self.announced_blockhashes.add(x.hash)
+
+    # Requires caller to hold mininode_lock
+    def received_block_announcement(self):
+        return self.block_announced
+
+    def clear_block_announcement(self):
+        with mininode_lock:
+            self.block_announced = False
+            self.last_message.pop("inv", None)
+            self.last_message.pop("headers", None)
+            self.last_message.pop("cmpctblock", None)
+
+    def get_headers(self, locator, hashstop):
+        msg = msg_getheaders()
+        msg.locator.vHave = locator
+        msg.hashstop = hashstop
+        self.connection.send_message(msg)
+
+    def send_header_for_blocks(self, new_blocks):
+        headers_message = msg_headers()
+        headers_message.headers = [CBlockHeader(b) for b in new_blocks]
+        self.send_message(headers_message)
+
+    def request_headers_and_sync(self, locator, hashstop=0):
+        self.clear_block_announcement()
+        self.get_headers(locator, hashstop)
+        wait_until(self.received_block_announcement, timeout=30, lock=mininode_lock)
+        self.clear_block_announcement()
+
+    # Block until a block announcement for a particular block hash is received.
+    def wait_for_block_announcement(self, block_hash, timeout=30):
+        def received_hash():
+            return (block_hash in self.announced_blockhashes)
+        wait_until(received_hash, timeout=timeout, lock=mininode_lock)
+
+    def send_await_disconnect(self, message, timeout=30):
+        """Sends a message to the node and wait for disconnect.
+
+        This is used when we want to send a message into the node that we expect
+        will get us disconnected, eg an invalid block."""
+        self.send_message(message)
+        wait_until(lambda: not self.connected, timeout=timeout, lock=mininode_lock)
+
+
+
+''' -------------------------------------------------------------------------
+MISC METHODS ----------------------------------------------------------------
+'''
+
+def dir_size(path):
+    ''' returns the size in bytes of the directory at given path
+    '''
+    size = subprocess.check_output(['du','-shk', path]).split()[0].decode('utf-8')
+    return int(size)
+
+
+def create_transaction(outPoint, sig, value, nTime, scriptPubKey=CScript()):
+    ''' creates a CTransaction object provided input-output data
+    '''
+    tx = CTransaction()
+    tx.vin.append(CTxIn(outPoint, sig, 0xffffffff))
+    tx.vout.append(CTxOut(value, scriptPubKey))
+    tx.nTime = nTime
+    tx.calc_sha256()
+    return tx
+
+
+def utxo_to_stakingPrevOuts(utxo, stakingPrevOuts, txBlocktime, stakeModifier, zpos=False):
+    '''
+    Updates a map of unspent outputs to (amount, blocktime) to be used as stake inputs
+    :param   utxo:     <if zpos=False>  (map) utxo JSON object returned from listunspent
+                       <if zpos=True>   (map) mint JSON object returned from listmintedzerocoins
+             stakingPrevOuts:   ({COutPoint --> (int, int, int, str)} dictionary)
+                                map outpoints to amount, block_time, nStakeModifier, hashStake hex
+             txBlocktime:       (int) block time of the stake Modifier
+             stakeModifier:     (int) stake modifier for the current utxo
+             zpos:              (bool) if true, utxo holds a zerocoin serial hash
+    :return
+    '''
+
+    COINBASE_MATURITY = 200 if zpos else 100
+    if utxo['confirmations'] > COINBASE_MATURITY:
+        if zpos:
+            outPoint = utxo["serial hash"]
+            stakingPrevOuts[outPoint] = (int(utxo["denomination"]) * COIN, txBlocktime, stakeModifier, utxo['hash stake'])
+        else:
+            outPoint = COutPoint(int(utxo['txid'], 16), utxo['vout'])
+            stakingPrevOuts[outPoint] = (int(utxo['amount'])*COIN, txBlocktime, stakeModifier, "")
+
+    return
+
+