Add Groestlcoin and change hashes

gruve-p · May 23, 2017 · b7345bf · b7345bf
1 parent 3f89c80
commit b7345bf
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Showing 4 changed files with 37 additions and 19 deletions.
diff --git a/lib/coins.py b/lib/coins.py
@@ -37,7 +37,7 @@
 from hashlib import sha256
 
 import lib.util as util
-from lib.hash import Base58, hash160, double_sha256, hash_to_str
+from lib.hash import Base58, hash160, double_sha256, hash_to_str, groestlHash
 from lib.script import ScriptPubKey
 from lib.tx import Deserializer, DeserializerSegWit, DeserializerAuxPow, DeserializerZcash
 
@@ -311,6 +311,30 @@ def block_header(cls, block, height):
         return block.read_header(height, cls.BASIC_HEADER_SIZE)
 
 
+class Groestlcoin(Coin):
+    NAME = "Groestlcoin"
+    SHORTNAME = "GRS"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("0488b21e")
+    XPRV_VERBYTES = bytes.fromhex("0488ade4")
+    GENESIS_HASH = ('00000ac5927c594d49cc0bdb81759d0d'
+                    'a8297eb614683d3acb62f0703b639023')
+    P2PKH_VERBYTE = bytes.fromhex("24")
+    P2SH_VERBYTE = bytes.fromhex("05")
+    WIF_BYTE = bytes.fromhex("80")
+
+    TX_COUNT = 1000000
+    TX_COUNT_HEIGHT = 1000000
+    TX_PER_BLOCK = 10
+
+    IRC_PREFIX = "E-grs_"
+    IRC_CHANNEL = "#Groestlcoin"
+
+    @classmethod
+    def header_hash(cls, header):
+        '''Given a header return the hash.'''
+        return groestlHash(header)
+
 class Bitcoin(Coin):
     NAME = "Bitcoin"
     SHORTNAME = "BTC"

diff --git a/lib/hash.py b/lib/hash.py
@@ -28,10 +28,14 @@
 
 import hashlib
 import hmac
+import groestlcoin_hash
 
 from lib.util import bytes_to_int, int_to_bytes
 
 
+def groestlHash(x):
+    return groestlcoin_hash.getHash(x, len(x))
+
 def sha256(x):
     '''Simple wrapper of hashlib sha256.'''
     assert isinstance(x, (bytes, bytearray, memoryview))
@@ -143,7 +147,7 @@ def decode_check(txt):
         prefixes it.'''
         be_bytes = Base58.decode(txt)
         result, check = be_bytes[:-4], be_bytes[-4:]
-        if check != double_sha256(result)[:4]:
+        if check != groestlHash(result)[:4]:
             raise Base58Error('invalid base 58 checksum for {}'.format(txt))
         return result
 
@@ -153,5 +157,5 @@ def encode_check(payload):
         into a Base58Check string."""
         assert isinstance(payload, (bytes, bytearray, memoryview))
 
-        be_bytes = payload + double_sha256(payload)[:4]
+        be_bytes = payload + groestlHash(payload)[:4]
         return Base58.encode(be_bytes)
diff --git a/lib/tx.py b/lib/tx.py
@@ -32,7 +32,7 @@
 from struct import unpack_from
 
 from lib.util import cachedproperty
-from lib.hash import double_sha256, hash_to_str
+from lib.hash import sha256, double_sha256, hash_to_str
 
 
 class Tx(namedtuple("Tx", "version inputs outputs locktime")):
@@ -104,7 +104,7 @@ def read_tx(self):
             self._read_inputs(),    # inputs
             self._read_outputs(),   # outputs
             self._read_le_uint32()  # locktime
-        ), double_sha256(self.binary[start:self.cursor])
+        ), sha256(self.binary[start:self.cursor])
 
     def read_tx_block(self):
         '''Returns a list of (deserialized_tx, tx_hash) pairs.'''
@@ -237,7 +237,7 @@ def read_tx(self):
         orig_ser += self.binary[start:self.cursor]
 
         return TxSegWit(version, marker, flag, inputs,
-                        outputs, witness, locktime), double_sha256(orig_ser)
+                        outputs, witness, locktime), sha256(orig_ser)
 
 
 class DeserializerAuxPow(Deserializer):

diff --git a/tests/lib/test_addresses.py b/tests/lib/test_addresses.py
@@ -26,22 +26,12 @@
 
 import pytest
 
-from lib.coins import Litecoin, Bitcoin, Zcash
+from lib.coins import Litecoin, Bitcoin, Groestlcoin
 from lib.hash import Base58
 
 addresses = [
-    (Bitcoin, "13xDKJbjh4acmLpNVr6Lc9hFcXRr9fyt4x",
-     "206168f5322583ff37f8e55665a4789ae8963532", "b8cb80b26e8932f5b12a7e"),
-    (Bitcoin, "3GxRZWkJufR5XA8hnNJgQ2gkASSheoBcmW",
-     "a773db925b09add367dcc253c1f9bbc1d11ec6fd", "062d8515e50cb92b8a3a73"),
-    (Litecoin, "LNBAaWuZmipg29WXfz5dtAm1pjo8FEH8yg",
-     "206168f5322583ff37f8e55665a4789ae8963532", "b8cb80b26e8932f5b12a7e"),
-    (Litecoin, "3GxRZWkJufR5XA8hnNJgQ2gkASSheoBcmW",
-     "a773db925b09add367dcc253c1f9bbc1d11ec6fd", "062d8515e50cb92b8a3a73"),
-    (Zcash, "t1LppKe1sfPNDMysGSGuTjxoAsBcvvSYv5j",
-     "206168f5322583ff37f8e55665a4789ae8963532", "b8cb80b26e8932f5b12a7e"),
-    (Zcash, "t3Zq2ZrASszCg7oBbio7oXqnfR6dnSWqo76",
-     "a773db925b09add367dcc253c1f9bbc1d11ec6fd", "062d8515e50cb92b8a3a73"),
+    (Groestlcoin, "FY7vmDL7FZGACwqVNx5p4fVaGghojWM5AF",
+    "206168f5322583ff37f8e55665a4789ae8963532", "b8cb80b26e8932f5b12a7e"),
 ]