#!/usr/bin/env python3
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from __future__ import print_function
import time
"""Test daemon blockchain RPC calls
Test the following RPCs:
- get_info
- generateblocks
- misc block retrieval
- pop_blocks
- [TODO: many tests still need to be written]
"""
from framework.daemon import Daemon
class BlockchainTest():
def run_test(self):
self.reset()
self._test_generateblocks(5)
self._test_alt_chains()
def reset(self):
print('Resetting blockchain')
daemon = Daemon()
daemon.pop_blocks(1000)
daemon.flush_txpool()
def _test_generateblocks(self, blocks):
assert blocks >= 2
print("Test generating", blocks, 'blocks')
daemon = Daemon()
# check info/height before generating blocks
res_info = daemon.get_info()
height = res_info.height
prev_block = res_info.top_block_hash
res_height = daemon.get_height()
assert res_height.height == height
assert int(res_info.wide_cumulative_difficulty, 16) == (res_info.cumulative_difficulty_top64 << 64) + res_info.cumulative_difficulty
cumulative_difficulty = int(res_info.wide_cumulative_difficulty, 16)
# we should not see a block at height
ok = False
try: daemon.getblock(height = height)
except: ok = True
assert ok
# generate blocks
res_generateblocks = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', blocks)
# check info/height after generateblocks blocks
assert res_generateblocks.height == height + blocks - 1
res_info = daemon.get_info()
assert res_info.height == height + blocks
assert res_info.top_block_hash != prev_block
res_height = daemon.get_height()
assert res_height.height == height + blocks
# get the blocks, check they have the right height
res_getblock = []
for n in range(blocks):
res_getblock.append(daemon.getblock(height = height + n))
block_header = res_getblock[n].block_header
assert abs(block_header.timestamp - time.time()) < 10 # within 10 seconds
assert block_header.height == height + n
assert block_header.orphan_status == False
assert block_header.depth == blocks - n - 1
assert block_header.prev_hash == prev_block, prev_block
assert int(block_header.wide_difficulty, 16) == (block_header.difficulty_top64 << 64) + block_header.difficulty
assert int(block_header.wide_cumulative_difficulty, 16) == (block_header.cumulative_difficulty_top64 << 64) + block_header.cumulative_difficulty
assert block_header.reward >= 600000000000 # tail emission
cumulative_difficulty += int(block_header.wide_difficulty, 16)
assert cumulative_difficulty == int(block_header.wide_cumulative_difficulty, 16)
assert block_header.block_size > 0
assert block_header.block_weight >= block_header.block_size
assert block_header.long_term_weight > 0
prev_block = block_header.hash
# we should not see a block after that
ok = False
try: daemon.getblock(height = height + blocks)
except: ok = True
assert ok
# getlastblockheader and by height/hash should return the same block
res_getlastblockheader = daemon.getlastblockheader()
assert res_getlastblockheader.block_header == block_header
res_getblockheaderbyhash = daemon.getblockheaderbyhash(prev_block)
assert res_getblockheaderbyhash.block_header == block_header
res_getblockheaderbyheight = daemon.getblockheaderbyheight(height + blocks - 1)
assert res_getblockheaderbyheight.block_header == block_header
# getting a block template after that should have the right height, etc
res_getblocktemplate = daemon.getblocktemplate('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm')
assert res_getblocktemplate.height == height + blocks
assert res_getblocktemplate.reserved_offset > 0
assert res_getblocktemplate.prev_hash == res_info.top_block_hash
assert res_getblocktemplate.expected_reward >= 600000000000
assert len(res_getblocktemplate.blocktemplate_blob) > 0
assert len(res_getblocktemplate.blockhashing_blob) > 0
assert int(res_getblocktemplate.wide_difficulty, 16) == (res_getblocktemplate.difficulty_top64 << 64) + res_getblocktemplate.difficulty
# diff etc should be the same
assert res_getblocktemplate.prev_hash == res_info.top_block_hash
res_getlastblockheader = daemon.getlastblockheader()
# pop a block
res_popblocks = daemon.pop_blocks(1)
assert res_popblocks.height == height + blocks - 1
res_info = daemon.get_info()
assert res_info.height == height + blocks - 1
# getlastblockheader and by height/hash should return the previous block
block_header = res_getblock[blocks - 2].block_header
block_header.depth = 0 # this will be different, ignore it
res_getlastblockheader = daemon.getlastblockheader()
assert res_getlastblockheader.block_header == block_header
res_getblockheaderbyhash = daemon.getblockheaderbyhash(block_header.hash)
assert res_getblockheaderbyhash.block_header == block_header
res_getblockheaderbyheight = daemon.getblockheaderbyheight(height + blocks - 2)
assert res_getblockheaderbyheight.block_header == block_header
# we should not see the popped block anymore
ok = False
try: daemon.getblock(height = height + blocks - 1)
except: ok = True
assert ok
# get transactions
res = daemon.get_info()
assert res.height == height + blocks - 1
nblocks = height + blocks - 1
res = daemon.getblockheadersrange(0, nblocks - 1)
assert len(res.headers) == nblocks
assert res.headers[-1] == block_header
txids = [x.miner_tx_hash for x in res.headers]
res = daemon.get_transactions(txs_hashes = txids)
assert len(res.txs) == nblocks
assert not 'missed_txs' in res or len(res.missed_txs) == 0
running_output_index = 0
for i in range(len(txids)):
tx = res.txs[i]
assert tx.tx_hash == txids[i]
assert not tx.double_spend_seen
assert not tx.in_pool
assert tx.block_height == i
if i > 0:
for idx in tx.output_indices:
assert idx == running_output_index
running_output_index += 1
res_out = daemon.get_outs([{'amount': 0, 'index': idx} for idx in tx.output_indices], get_txid = True)
assert len(res_out.outs) == len(tx.output_indices)
for out in res_out.outs:
assert len(out.key) == 64
assert len(out.mask) == 64
assert not out.unlocked
assert out.height == i
assert out.txid == txids[i]
for i in range(height + nblocks - 1):
res_sum = daemon.get_coinbase_tx_sum(i, 1)
res_header = daemon.getblockheaderbyheight(i)
assert res_sum.emission_amount == res_header.block_header.reward
res = daemon.get_coinbase_tx_sum(0, 1)
assert res.emission_amount == 17592186044415
assert res.fee_amount == 0
sum_blocks = height + nblocks - 1
res = daemon.get_coinbase_tx_sum(0, sum_blocks)
extrapolated = 17592186044415 + 17592186044415 * 2 * (sum_blocks - 1)
assert res.emission_amount < extrapolated and res.emission_amount > extrapolated - 1e12
assert res.fee_amount == 0
sum_blocks_emission = res.emission_amount
res = daemon.get_coinbase_tx_sum(1, sum_blocks)
assert res.emission_amount == sum_blocks_emission - 17592186044415
assert res.fee_amount == 0
res = daemon.get_output_distribution([0, 1, 17592186044415], 0, 0)
assert len(res.distributions) == 3
for a in range(3):
assert res.distributions[a].amount == [0, 1, 17592186044415][a]
assert res.distributions[a].start_height == 0
assert res.distributions[a].base == 0
assert len(res.distributions[a].distribution) == height + nblocks - 1
assert res.distributions[a].binary == False
for i in range(height + nblocks - 1):
assert res.distributions[a].distribution[i] == (1 if i > 0 and a == 0 else 1 if a == 2 and i == 0 else 0)
res = daemon.get_output_histogram([], min_count = 0, max_count = 0)
assert len(res.histogram) == 2
for i in range(2):
assert res.histogram[i].amount in [0, 17592186044415]
assert res.histogram[i].total_instances in [height + nblocks - 2, 1]
assert res.histogram[i].unlocked_instances == 0
assert res.histogram[i].recent_instances == 0
def _test_alt_chains(self):
print('Testing alt chains')
daemon = Daemon()
res = daemon.get_alt_blocks_hashes()
starting_alt_blocks = res.blks_hashes if 'blks_hashes' in res else []
res = daemon.get_info()
root_block_hash = res.top_block_hash
height = res.height
prev_hash = res.top_block_hash
res_template = daemon.getblocktemplate('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm')
nonce = 0
# 5 siblings
alt_blocks = [None] * 5
for i in range(len(alt_blocks)):
res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 1, prev_block = prev_hash, starting_nonce = nonce)
assert res.height == height
assert len(res.blocks) == 1
txid = res.blocks[0]
res = daemon.getblockheaderbyhash(txid)
nonce = res.block_header.nonce
print('mined ' + ('alt' if res.block_header.orphan_status else 'tip') + ' block ' + str(height) + ', nonce ' + str(nonce))
assert res.block_header.prev_hash == prev_hash
assert res.block_header.orphan_status == (i > 0)
alt_blocks[i] = txid
nonce += 1
print('mining 3 on 1')
# three more on [1]
chain1 = []
res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 3, prev_block = alt_blocks[1], starting_nonce = nonce)
assert res.height == height + 3
assert len(res.blocks) == 3
blk_hash = res.blocks[2]
res = daemon.getblockheaderbyhash(blk_hash)
nonce = res.block_header.nonce
assert not res.block_header.orphan_status
nonce += 1
chain1.append(blk_hash)
chain1.append(res.block_header.prev_hash)
print('Checking alt blocks match')
res = daemon.get_alt_blocks_hashes()
assert len(res.blks_hashes) == len(starting_alt_blocks) + 4
for txid in alt_blocks:
assert txid in res.blks_hashes or txid == alt_blocks[1]
print('mining 4 on 3')
# 4 more on [3], the chain will reorg when we mine the 4th
top_block_hash = blk_hash
prev_block = alt_blocks[3]
for i in range(4):
res = daemon.generateblocks('42ey1afDFnn4886T7196doS9GPMzexD9gXpsZJDwVjeRVdFCSoHnv7KPbBeGpzJBzHRCAs9UxqeoyFQMYbqSWYTfJJQAWDm', 1, prev_block = prev_block)
assert res.height == height + 1 + i
assert len(res.blocks) == 1
prev_block = res.blocks[-1]
res = daemon.getblockheaderbyhash(res.blocks[-1])
assert res.block_header.orphan_status == (i < 3)
res = daemon.get_info()
assert res.height == ((height + 4) if i < 3 else height + 5)
assert res.top_block_hash == (top_block_hash if i < 3 else prev_block)
res = daemon.get_info()
assert res.height == height + 5
assert res.top_block_hash == prev_block
print('Checking alt blocks match')
res = daemon.get_alt_blocks_hashes()
blks_hashes = res.blks_hashes
assert len(blks_hashes) == len(starting_alt_blocks) + 7
for txid in alt_blocks:
assert txid in blks_hashes or txid == alt_blocks[3]
for txid in chain1:
assert txid in blks_hashes
res = daemon.get_alternate_chains()
assert len(res.chains) == 4
tips = [chain.block_hash for chain in res.chains]
for txid in tips:
assert txid in blks_hashes
for chain in res.chains:
assert chain.length in [1, 4]
assert chain.length == len(chain.block_hashes)
assert chain.height == height + chain.length - 1 # all happen start at the same height
assert chain.main_chain_parent_block == root_block_hash
for txid in [alt_blocks[0], alt_blocks[2], alt_blocks[4]]:
assert len([chain for chain in res.chains if chain.block_hash == txid]) == 1
if __name__ == '__main__':
BlockchainTest().run_test()
