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test fixes related to headers

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Lex Berezhny 2018-08-16 01:38:28 -04:00 committed by Jack Robison
parent 434d98c6a6
commit d1f00255c1
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3 changed files with 163 additions and 85 deletions
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3
lbrynet/wallet/header.py
View file

@ -2,7 +2,8 @@ import struct
from typing import Optional
from binascii import hexlify, unhexlify
from torba.baseheader import BaseHeaders, ArithUint256
from torba.baseheader import BaseHeaders
from torba.util import ArithUint256
from torba.hash import sha512, double_sha256, ripemd160

86
lbrynet/wallet/ledger.py
View file

@ -10,95 +10,17 @@ from .resolve import Resolver
from lbryschema.error import URIParseError
from lbryschema.uri import parse_lbry_uri
from torba.baseledger import BaseLedger
from torba.baseheader import BaseHeaders, _ArithUint256
from torba.util import int_to_hex, rev_hex, hash_encode
from .account import Account
from .network import Network
from .database import WalletDatabase
from .transaction import Transaction
from .header import Headers, UnvalidatedHeaders
log = logging.getLogger(__name__)
class Headers(BaseHeaders):
header_size = 112
@staticmethod
def _serialize(header):
return b''.join([
int_to_hex(header['version'], 4),
rev_hex(header['prev_block_hash']),
rev_hex(header['merkle_root']),
rev_hex(header['claim_trie_root']),
int_to_hex(int(header['timestamp']), 4),
int_to_hex(int(header['bits']), 4),
int_to_hex(int(header['nonce']), 4)
])
@staticmethod
def _deserialize(height, header):
version, = struct.unpack('<I', header[:4])
timestamp, bits, nonce = struct.unpack('<III', header[100:112])
return {
'version': version,
'prev_block_hash': hash_encode(header[4:36]),
'merkle_root': hash_encode(header[36:68]),
'claim_trie_root': hash_encode(header[68:100]),
'timestamp': timestamp,
'bits': bits,
'nonce': nonce,
'block_height': height,
}
@property
def claim_trie_root(self, height=None):
height = self.height if height is None else height
return self[height]['claim_trie_root']
def _calculate_next_work_required(self, height, first, last):
""" See: lbrycrd/src/lbry.cpp """
if height == 0:
return self.ledger.genesis_bits, self.ledger.max_target
if self.verify_bits_to_target:
bits = last['bits']
bitsN = (bits >> 24) & 0xff
assert 0x03 <= bitsN <= 0x1f, \
"First part of bits should be in [0x03, 0x1d], but it was {}".format(hex(bitsN))
bitsBase = bits & 0xffffff
assert 0x8000 <= bitsBase <= 0x7fffff, \
"Second part of bits should be in [0x8000, 0x7fffff] but it was {}".format(bitsBase)
# new target
retargetTimespan = self.ledger.target_timespan
nActualTimespan = last['timestamp'] - first['timestamp']
nModulatedTimespan = retargetTimespan + (nActualTimespan - retargetTimespan) // 8
nMinTimespan = retargetTimespan - (retargetTimespan // 8)
nMaxTimespan = retargetTimespan + (retargetTimespan // 2)
# Limit adjustment step
if nModulatedTimespan < nMinTimespan:
nModulatedTimespan = nMinTimespan
elif nModulatedTimespan > nMaxTimespan:
nModulatedTimespan = nMaxTimespan
# Retarget
bnPowLimit = _ArithUint256(self.ledger.max_target)
bnNew = _ArithUint256.set_compact(last['bits'])
bnNew *= nModulatedTimespan
bnNew //= nModulatedTimespan
if bnNew > bnPowLimit:
bnNew = bnPowLimit
return bnNew.get_compact(), bnNew._value
class MainNetLedger(BaseLedger):
name = 'LBRY Credits'
symbol = 'LBC'
@ -156,13 +78,9 @@ class TestNetLedger(MainNetLedger):
extended_private_key_prefix = unhexlify('04358394')
class UnverifiedHeaders(Headers):
verify_bits_to_target = False
class RegTestLedger(MainNetLedger):
network_name = 'regtest'
headers_class = UnverifiedHeaders
headers_class = UnvalidatedHeaders
pubkey_address_prefix = int2byte(111)
script_address_prefix = int2byte(196)
extended_public_key_prefix = unhexlify('043587cf')

159
tests/unit/wallet/test_headers.py Normal file
View file

@ -0,0 +1,159 @@
from io import BytesIO
from binascii import unhexlify
from twisted.trial import unittest
from twisted.internet import defer
from lbrynet.wallet.ledger import Headers
from torba.util import ArithUint256
class TestHeaders(unittest.TestCase):
def test_deserialize(self):
self.maxDiff = None
h = Headers(':memory:')
h.io.write(HEADERS)
self.assertEqual(h[0], {
'bits': 520159231,
'block_height': 0,
'claim_trie_root': b'0000000000000000000000000000000000000000000000000000000000000001',
'merkle_root': b'b8211c82c3d15bcd78bba57005b86fed515149a53a425eb592c07af99fe559cc',
'nonce': 1287,
'prev_block_hash': b'0000000000000000000000000000000000000000000000000000000000000000',
'timestamp': 1446058291,
'version': 1
})
self.assertEqual(h[10], {
'bits': 509349720,
'block_height': 10,
'merkle_root': b'f4d8fded6a181d4a8a2817a0eb423cc0f414af29490004a620e66c35c498a554',
'claim_trie_root': b'0000000000000000000000000000000000000000000000000000000000000001',
'nonce': 75838,
'prev_block_hash': b'fdab1b38bcf236bc85b6bcd52fe8ec19bcb0b6c7352e913de05fa5a4e5ae8d55',
'timestamp': 1466646593,
'version': 536870912
})
@defer.inlineCallbacks
def test_connect_from_genesis(self):
headers = Headers(':memory:')
self.assertEqual(headers.height, -1)
yield headers.connect(0, HEADERS)
self.assertEqual(headers.height, 19)
@defer.inlineCallbacks
def test_connect_from_middle(self):
h = Headers(':memory:')
h.io.write(HEADERS[:10*Headers.header_size])
self.assertEqual(h.height, 9)
yield h.connect(len(h), HEADERS[10*Headers.header_size:20*Headers.header_size])
self.assertEqual(h.height, 19)
def test_target_calculation(self):
# see: https://github.com/lbryio/lbrycrd/blob/master/src/test/lbry_tests.cpp
# 1 test block 1 difficulty, should be a max retarget
self.assertEqual(
0x1f00e146,
Headers(':memory').get_next_block_target(
max_target=ArithUint256(Headers.max_target),
previous={'timestamp': 1386475638},
current={'timestamp': 1386475638, 'bits': 0x1f00ffff}
).compact
)
# test max retarget (difficulty increase)
self.assertEqual(
0x1f008ccc,
Headers(':memory').get_next_block_target(
max_target=ArithUint256(Headers.max_target),
previous={'timestamp': 1386475638},
current={'timestamp': 1386475638, 'bits': 0x1f00a000}
).compact
)
# test min retarget (difficulty decrease)
self.assertEqual(
0x1f00f000,
Headers(':memory').get_next_block_target(
max_target=ArithUint256(Headers.max_target),
previous={'timestamp': 1386475638},
current={'timestamp': 1386475638 + 60*20, 'bits': 0x1f00a000}
).compact
)
# test to see if pow limit is not exceeded
self.assertEqual(
0x1f00ffff,
Headers(':memory').get_next_block_target(
max_target=ArithUint256(Headers.max_target),
previous={'timestamp': 1386475638},
current={'timestamp': 1386475638 + 600, 'bits': 0x1f00ffff}
).compact
)
def test_get_proof_of_work_hash(self):
# see: https://github.com/lbryio/lbrycrd/blob/master/src/test/lbry_tests.cpp
self.assertEqual(
Headers.header_hash_to_pow_hash(Headers.hash_header(b"test string")),
b"485f3920d48a0448034b0852d1489cfa475341176838c7d36896765221be35ce"
)
self.assertEqual(
Headers.header_hash_to_pow_hash(Headers.hash_header(b"a"*70)),
b"eb44af2f41e7c6522fb8be4773661be5baa430b8b2c3a670247e9ab060608b75"
)
self.assertEqual(
Headers.header_hash_to_pow_hash(Headers.hash_header(b"d"*140)),
b"74044747b7c1ff867eb09a84d026b02d8dc539fb6adcec3536f3dfa9266495d9"
)
HEADERS = unhexlify(
b'010000000000000000000000000000000000000000000000000000000000000000000000cc59e59ff97ac092b55e4'
b'23aa5495151ed6fb80570a5bb78cd5bd1c3821c21b801000000000000000000000000000000000000000000000000'
b'0000000000000033193156ffff001f070500000000002063f4346a4db34fdfce29a70f5e8d11f065f6b91602b7036'
b'c7f22f3a03b28899cba888e2f9c037f831046f8ad09f6d378f79c728d003b177a64d29621f481da5d010000000000'
b'00000000000000000000000000000000000000000000000000003c406b5746e1001f5b4f000000000020246cb8584'
b'3ac936d55388f2ff288b011add5b1b20cca9cfd19a403ca2c9ecbde09d8734d81b5f2eb1b653caf17491544ddfbc7'
b'2f2f4c0c3f22a3362db5ba9d4701000000000000000000000000000000000000000000000000000000000000003d4'
b'06b57ffff001f4ff20000000000200044e1258b865d262587c28ff98853bc52bb31266230c1c648cc9004047a5428'
b'e285dbf24334585b9a924536a717160ee185a86d1eeb7b19684538685eca761a01000000000000000000000000000'
b'000000000000000000000000000000000003d406b5746e1001fce9c010000000020bbf8980e3f7604896821203bf6'
b'2f97f311124da1fbb95bf523fcfdb356ad19c9d83cf1408debbd631950b7a95b0c940772119cd8a615a3d44601568'
b'713fec80c01000000000000000000000000000000000000000000000000000000000000003e406b573dc6001fec7b'
b'0000000000201a650b9b7b9d132e257ff6b336ba7cd96b1796357c4fc8dd7d0bd1ff1de057d547638e54178dbdddf'
b'2e81a3b7566860e5264df6066755f9760a893f5caecc5790100000000000000000000000000000000000000000000'
b'0000000000000000003e406b5773ae001fcf770000000000206d694b93a2bb5ac23a13ed6749a789ca751cf73d598'
b'2c459e0cd9d5d303da74cec91627e0dba856b933983425d7f72958e8f974682632a0fa2acee9cfd81940101000000'
b'000000000000000000000000000000000000000000000000000000003e406b578399001f225c010000000020b5780'
b'8c188b7315583cf120fe89de923583bc7a8ebff03189145b86bf859b21ba3c4a19948a1263722c45c5601fd10a7ae'
b'a7cf73bfa45e060508f109155e80ab010000000000000000000000000000000000000000000000000000000000000'
b'03f406b571787001f0816070000000020a6a5b330e816242d54c8586ba9b6d63c19d921171ef3d4525b8ffc635742'
b'e83a0fc2da46cf0de0057c1b9fc93d997105ff6cf2c8c43269b446c1dbf5ac18be8c0100000000000000000000000'
b'00000000000000000000000000000000000000040406b570ae1761edd8f030000000020b8447f415279dffe8a09af'
b'e6f6d5e335a2f6911fce8e1d1866723d5e5e8a53067356a733f87e592ea133328792dd9d676ed83771c8ff0f51992'
b'8ce752f159ba6010000000000000000000000000000000000000000000000000000000000000040406b57139d681e'
b'd40d000000000020558daee5a4a55fe03d912e35c7b6b0bc19ece82fd5bcb685bc36f2bc381babfd54a598c4356ce'
b'620a604004929af14f4c03c42eba017288a4a1d186aedfdd8f4010000000000000000000000000000000000000000'
b'000000000000000000000041406b57580f5c1e3e280100000000200381bfc0b2f10c9a3c0fc2dc8ad06388aff8ea5'
b'a9f7dba6a945073b021796197364b79f33ff3f3a7ccb676fc0a37b7d831bd5942a05eac314658c6a7e4c4b1a40100'
b'00000000000000000000000000000000000000000000000000000000000041406b574303511ec0ae0100000000202'
b'aae02063ae0f1025e6acecd5e8e2305956ecaefd185bb47a64ea2ae953233891df3d4c1fc547ab3bbca027c8bbba7'
b'44c051add8615d289b567f97c64929dcf201000000000000000000000000000000000000000000000000000000000'
b'0000042406b578c4a471e04ee00000000002016603ef45d5a7c02bfbb30f422016746872ff37f8b0b5824a0f70caa'
b'668eea5415aad300e70f7d8755d93645d1fd21eda9c40c5d0ed797acd0e07ace34585aaf010000000000000000000'
b'000000000000000000000000000000000000000000042406b577bbc3e1ea163000000000020cad8863b312914f2fd'
b'2aad6e9420b64859039effd67ac4681a7cf60e42b09b7e7bafa1e8d5131f477785d8338294da0f998844a85b39d24'
b'26e839b370e014e3b010000000000000000000000000000000000000000000000000000000000000042406b573935'
b'371e20e900000000002053d5e608ce5a12eda5931f86ee81198fdd231fea64cf096e9aeae321cf2efbe241e888d5a'
b'af495e4c2a9f11b932db979d7483aeb446f479179b0c0b8d24bfa0e01000000000000000000000000000000000000'
b'0000000000000000000000000045406b573c95301e34af0a0000000020df0e494c02ff79e3929bc1f2491077ec4f6'
b'a607d7a1a5e1be96536642c98f86e533febd715f8a234028fd52046708551c6b6ac415480a6568aaa35cb94dc7203'
b'01000000000000000000000000000000000000000000000000000000000000004f406b57c4c02a1ec54d230000000'
b'020341f7d8e7d242e5e46343c40840c44f07e7e7306eb2355521b51502e8070e569485ba7eec4efdff0fc755af6e7'
b'3e38b381a88b0925a68193a25da19d0f616e9f0100000000000000000000000000000000000000000000000000000'
b'00000000050406b575be8251e1f61010000000020cd399f8078166ca5f0bdd1080ab1bb22d3c271b9729b6000b44f'
b'4592cc9fab08c00ebab1e7cd88677e3b77c1598c7ac58660567f49f3a30ec46a48a1ae7652fe01000000000000000'
b'0000000000000000000000000000000000000000000000052406b57d55b211e6f53090000000020c6c14ed4a53bbb'
b'4f181acf2bbfd8b74d13826732f2114140ca99ca371f7dd87c51d18a05a1a6ffa37c041877fa33c2229a45a0ab66b'
b'5530f914200a8d6639a6f010000000000000000000000000000000000000000000000000000000000000055406b57'
b'0d5b1d1eff1c0900'
)