mirror of https://github.com/bitcoin/bitcoin.git
158 lines
7.1 KiB
Python
Executable File
158 lines
7.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2020-2022 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Test the getblockfrompeer RPC."""
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from test_framework.authproxy import JSONRPCException
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from test_framework.messages import (
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CBlock,
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from_hex,
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msg_headers,
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NODE_WITNESS,
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)
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from test_framework.p2p import (
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P2P_SERVICES,
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P2PInterface,
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)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (
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assert_equal,
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assert_raises_rpc_error,
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)
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class GetBlockFromPeerTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 3
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self.extra_args = [
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[],
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[],
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["-fastprune", "-prune=1"]
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]
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def setup_network(self):
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self.setup_nodes()
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def check_for_block(self, node, hash):
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try:
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self.nodes[node].getblock(hash)
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return True
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except JSONRPCException:
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return False
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def run_test(self):
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self.log.info("Mine 4 blocks on Node 0")
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self.generate(self.nodes[0], 4, sync_fun=self.no_op)
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assert_equal(self.nodes[0].getblockcount(), 204)
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self.log.info("Mine competing 3 blocks on Node 1")
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self.generate(self.nodes[1], 3, sync_fun=self.no_op)
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assert_equal(self.nodes[1].getblockcount(), 203)
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short_tip = self.nodes[1].getbestblockhash()
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self.log.info("Connect nodes to sync headers")
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self.connect_nodes(0, 1)
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self.sync_blocks(self.nodes[0:2])
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self.log.info("Node 0 should only have the header for node 1's block 3")
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x = next(filter(lambda x: x['hash'] == short_tip, self.nodes[0].getchaintips()))
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assert_equal(x['status'], "headers-only")
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assert_raises_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, short_tip)
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self.log.info("Fetch block from node 1")
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peers = self.nodes[0].getpeerinfo()
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assert_equal(len(peers), 1)
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peer_0_peer_1_id = peers[0]["id"]
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self.log.info("Arguments must be valid")
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assert_raises_rpc_error(-8, "hash must be of length 64 (not 4, for '1234')", self.nodes[0].getblockfrompeer, "1234", peer_0_peer_1_id)
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assert_raises_rpc_error(-3, "JSON value of type number is not of expected type string", self.nodes[0].getblockfrompeer, 1234, peer_0_peer_1_id)
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assert_raises_rpc_error(-3, "JSON value of type string is not of expected type number", self.nodes[0].getblockfrompeer, short_tip, "0")
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self.log.info("We must already have the header")
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assert_raises_rpc_error(-1, "Block header missing", self.nodes[0].getblockfrompeer, "00" * 32, 0)
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self.log.info("Non-existent peer generates error")
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for peer_id in [-1, peer_0_peer_1_id + 1]:
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assert_raises_rpc_error(-1, "Peer does not exist", self.nodes[0].getblockfrompeer, short_tip, peer_id)
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self.log.info("Fetching from pre-segwit peer generates error")
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self.nodes[0].add_p2p_connection(P2PInterface(), services=P2P_SERVICES & ~NODE_WITNESS)
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peers = self.nodes[0].getpeerinfo()
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assert_equal(len(peers), 2)
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presegwit_peer_id = peers[1]["id"]
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assert_raises_rpc_error(-1, "Pre-SegWit peer", self.nodes[0].getblockfrompeer, short_tip, presegwit_peer_id)
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self.log.info("Successful fetch")
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result = self.nodes[0].getblockfrompeer(short_tip, peer_0_peer_1_id)
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self.wait_until(lambda: self.check_for_block(node=0, hash=short_tip), timeout=1)
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assert_equal(result, {})
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self.log.info("Don't fetch blocks we already have")
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assert_raises_rpc_error(-1, "Block already downloaded", self.nodes[0].getblockfrompeer, short_tip, peer_0_peer_1_id)
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self.log.info("Don't fetch blocks while the node has not synced past it yet")
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# For this test we need node 1 in prune mode and as a side effect this also disconnects
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# the nodes which is also necessary for the rest of the test.
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self.restart_node(1, ["-prune=550"])
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# Generate a block on the disconnected node that the pruning node is not connected to
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blockhash = self.generate(self.nodes[0], 1, sync_fun=self.no_op)[0]
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block_hex = self.nodes[0].getblock(blockhash=blockhash, verbosity=0)
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block = from_hex(CBlock(), block_hex)
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# Connect a P2PInterface to the pruning node and have it submit only the header of the
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# block that the pruning node has not seen
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node1_interface = self.nodes[1].add_p2p_connection(P2PInterface())
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node1_interface.send_and_ping(msg_headers([block]))
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# Get the peer id of the P2PInterface from the pruning node
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node1_peers = self.nodes[1].getpeerinfo()
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assert_equal(len(node1_peers), 1)
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node1_interface_id = node1_peers[0]["id"]
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# Trying to fetch this block from the P2PInterface should not be possible
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error_msg = "In prune mode, only blocks that the node has already synced previously can be fetched from a peer"
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assert_raises_rpc_error(-1, error_msg, self.nodes[1].getblockfrompeer, blockhash, node1_interface_id)
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self.log.info("Connect pruned node")
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self.connect_nodes(0, 2)
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pruned_node = self.nodes[2]
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self.sync_blocks([self.nodes[0], pruned_node])
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# We need to generate more blocks to be able to prune
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self.generate(self.nodes[0], 400, sync_fun=self.no_op)
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self.sync_blocks([self.nodes[0], pruned_node])
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pruneheight = pruned_node.pruneblockchain(300)
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assert_equal(pruneheight, 248)
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# Ensure the block is actually pruned
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pruned_block = self.nodes[0].getblockhash(2)
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assert_raises_rpc_error(-1, "Block not available (pruned data)", pruned_node.getblock, pruned_block)
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self.log.info("Fetch pruned block")
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peers = pruned_node.getpeerinfo()
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assert_equal(len(peers), 1)
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pruned_node_peer_0_id = peers[0]["id"]
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result = pruned_node.getblockfrompeer(pruned_block, pruned_node_peer_0_id)
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self.wait_until(lambda: self.check_for_block(node=2, hash=pruned_block), timeout=1)
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assert_equal(result, {})
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self.log.info("Fetched block persists after next pruning event")
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self.generate(self.nodes[0], 250, sync_fun=self.no_op)
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self.sync_blocks([self.nodes[0], pruned_node])
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pruneheight += 251
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assert_equal(pruned_node.pruneblockchain(700), pruneheight)
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assert_equal(pruned_node.getblock(pruned_block)["hash"], "36c56c5b5ebbaf90d76b0d1a074dcb32d42abab75b7ec6fa0ffd9b4fbce8f0f7")
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self.log.info("Fetched block can be pruned again when prune height exceeds the height of the tip at the time when the block was fetched")
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self.generate(self.nodes[0], 250, sync_fun=self.no_op)
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self.sync_blocks([self.nodes[0], pruned_node])
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pruneheight += 250
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assert_equal(pruned_node.pruneblockchain(1000), pruneheight)
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assert_raises_rpc_error(-1, "Block not available (pruned data)", pruned_node.getblock, pruned_block)
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if __name__ == '__main__':
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GetBlockFromPeerTest().main()
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