rpc: improve get_output_distribution

It can now handle small reorgs without having to rescan the
whole blockchain.

Also add a test for it.

1 files changed, 217 insertions, 0 deletions

diff --git a/tests/functional_tests/get_output_distribution.py b/tests/functional_tests/get_output_distribution.py
new file mode 100755
index 000000000..2a0762d5e
--- /dev/null
+++ b/tests/functional_tests/get_output_distribution.py
@@ -0,0 +1,217 @@
+#!/usr/bin/env python3
+
+# Copyright (c) 2019 The Monero Project
+# 
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+# 
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+# 
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+# 
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import time
+
+"""Test get_output_distribution RPC
+"""
+
+from framework.daemon import Daemon
+from framework.wallet import Wallet
+
+class GetOutputDistributionTest():
+    def run_test(self):
+        self.reset()
+        self.create()
+        self.test_get_output_distribution()
+
+    def reset(self):
+        print 'Resetting blockchain'
+        daemon = Daemon()
+        daemon.pop_blocks(1000)
+        daemon.flush_txpool()
+
+    def create(self):
+        self.wallet = Wallet()
+        # close the wallet if any, will throw if none is loaded
+        try: self.wallet.close_wallet()
+        except: pass
+        res = self.wallet.restore_deterministic_wallet(seed = 'velvet lymph giddy number token physics poetry unquoted nibs useful sabotage limits benches lifestyle eden nitrogen anvil fewest avoid batch vials washing fences goat unquoted')
+
+    def test_get_output_distribution(self):
+        print "Test get_output_distribution"
+
+        daemon = Daemon()
+
+        res = daemon.get_output_distribution([0], 0, 0)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 1
+        assert d.distribution[0] == 0
+
+        res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 1)
+
+        res = daemon.get_output_distribution([0], 0, 0)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 2
+        assert d.distribution[0] == 0
+        assert d.distribution[1] == 1
+
+        res = daemon.pop_blocks(1)
+
+        res = daemon.get_output_distribution([0], 0, 0)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 1
+        assert d.distribution[0] == 0
+
+        res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 3)
+
+        res = daemon.get_output_distribution([0], 0, 0, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 4
+        assert d.distribution[0] == 0
+        assert d.distribution[1] == 1
+        assert d.distribution[2] == 2
+        assert d.distribution[3] == 3
+
+        # extend
+        res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 80)
+
+        res = daemon.get_output_distribution([0], 0, 0, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 84
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == h
+
+        # pop and replace, this will do through the "trim and extend" path
+        res = daemon.pop_blocks(2)
+        self.wallet.refresh()
+        dst = {'address': '42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 'amount': 1000000000000}
+        self.wallet.transfer([dst])
+        res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 1)
+        for step in range(3): # the second will be cached, the third will also be cached, but we get it in non-cumulative mode
+            res = daemon.get_output_distribution([0], 0, 0, cumulative = step < 3)
+            assert len(res.distributions) == 1
+            d = res.distributions[0]
+            assert d.amount == 0
+            assert d.base == 0
+            assert d.binary == False
+            assert len(d.distribution) == 83
+            for h in range(len(d.distribution)):
+                assert d.distribution[h] == (h if step < 3 else 1) + (2 if h == len(d.distribution) - 1 else 0)
+
+        # start at 0, end earlier
+        res = daemon.get_output_distribution([0], 0, 40, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 41
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == h
+
+        # start after 0, end earlier
+        res = daemon.get_output_distribution([0], 10, 20, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 9
+        assert d.binary == False
+        assert len(d.distribution) == 11
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == 10 + h
+
+        # straddling up
+        res = daemon.get_output_distribution([0], 15, 25, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 14
+        assert d.binary == False
+        assert len(d.distribution) == 11
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == 15 + h
+
+        # straddling down
+        res = daemon.get_output_distribution([0], 8, 18, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 7
+        assert d.binary == False
+        assert len(d.distribution) == 11
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == 8 + h
+
+        # encompassing
+        res = daemon.get_output_distribution([0], 5, 20, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 4
+        assert d.binary == False
+        assert len(d.distribution) == 16
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == 5 + h
+
+        # single
+        res = daemon.get_output_distribution([0], 2, 2, cumulative = True)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 0
+        assert d.base == 1
+        assert d.binary == False
+        assert len(d.distribution) == 1
+        assert d.distribution[0] == 2
+
+        # a non existent amount
+        res = daemon.get_output_distribution([1], 0, 0)
+        assert len(res.distributions) == 1
+        d = res.distributions[0]
+        assert d.amount == 1
+        assert d.base == 0
+        assert d.binary == False
+        assert len(d.distribution) == 83
+        for h in range(len(d.distribution)):
+            assert d.distribution[h] == 0
+
+
+if __name__ == '__main__':
+    GetOutputDistributionTest().run_test()