X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=p2pool%2Fbitcoin%2Fdata.py;h=74cb94bb7bc51986c4a9dd6ddda9fb0b862e1aa6;hb=f732111a6e08d7d0649c330d1c703535a8ea80b5;hp=de6d4057f4d29ae0b7f364faaaa17fee3666d9ef;hpb=3364c14b442a384fc9cda77863071e7421cfc61d;p=p2pool.git

diff --git a/p2pool/bitcoin/data.py b/p2pool/bitcoin/data.py
index de6d405..74cb94b 100644
--- a/p2pool/bitcoin/data.py
+++ b/p2pool/bitcoin/data.py
@@ -2,6 +2,7 @@ from __future__ import division
 
 import hashlib
 import random
+import warnings
 
 import p2pool
 from p2pool.util import math, pack
@@ -10,10 +11,11 @@ def hash256(data):
     return pack.IntType(256).unpack(hashlib.sha256(hashlib.sha256(data).digest()).digest())
 
 def hash160(data):
-    if data == '04ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664b'.decode('hex'):
-        return 0x384f570ccc88ac2e7e00b026d1690a3fca63dd0 # hack for people who don't have openssl - this is the only value that p2pool ever hashes
     return pack.IntType(160).unpack(hashlib.new('ripemd160', hashlib.sha256(data).digest()).digest())
 
+def scrypt(data):
+    return pack.IntType(256).unpack(__import__('ltc_scrypt').getPoWHash(data))
+
 class ChecksummedType(pack.Type):
     def __init__(self, inner, checksum_func=lambda data: hashlib.sha256(hashlib.sha256(data).digest()).digest()[:4]):
         self.inner = inner
@@ -92,6 +94,7 @@ address_type = pack.ComposedType([
 
 tx_type = pack.ComposedType([
     ('version', pack.IntType(32)),
+    ('timestamp', pack.IntType(32)), # txn timestamp
     ('tx_ins', pack.ListType(pack.ComposedType([
         ('previous_output', pack.PossiblyNoneType(dict(hash=0, index=2**32 - 1), pack.ComposedType([
             ('hash', pack.IntType(256)),
@@ -130,6 +133,7 @@ block_header_type = pack.ComposedType([
 block_type = pack.ComposedType([
     ('header', block_header_type),
     ('txs', pack.ListType(tx_type)),
+    ('signature', pack.VarStrType()), # header signature field
 ])
 
 # merged mining
@@ -214,13 +218,23 @@ def check_merkle_link(tip_hash, link):
 # targets
 
 def target_to_average_attempts(target):
+    assert 0 <= target and isinstance(target, (int, long)), target
+    if target >= 2**256: warnings.warn('target >= 2**256!')
     return 2**256//(target + 1)
 
+def average_attempts_to_target(average_attempts):
+    assert average_attempts > 0
+    return min(int(2**256/average_attempts - 1 + 0.5), 2**256-1)
+
 def target_to_difficulty(target):
+    assert 0 <= target and isinstance(target, (int, long)), target
+    if target >= 2**256: warnings.warn('target >= 2**256!')
     return (0xffff0000 * 2**(256-64) + 1)/(target + 1)
 
 def difficulty_to_target(difficulty):
-    return (0xffff0000 * 2**(256-64) + 1)/difficulty - 1
+    assert difficulty >= 0
+    if difficulty == 0: return 2**256-1
+    return min(int((0xffff0000 * 2**(256-64) + 1)/difficulty - 1 + 0.5), 2**256-1)
 
 # human addresses
 
@@ -251,6 +265,16 @@ def address_to_pubkey_hash(address, net):
         raise ValueError('address not for this net!')
     return x['pubkey_hash']
 
+def address_to_script(address, net):
+    x = human_address_type.unpack(base58_decode(address))
+
+    print x['pubkey_hash']
+
+    if x['version'] != net.ADDRESS_VERSION:
+        raise ValueError('address not for this net!')
+    return '\x76\xa9' + ('\x14' + pack.IntType(160).pack(x['pubkey_hash'])) + '\x88\xac'
+
+
 # transactions
 
 def pubkey_to_script2(pubkey):