Add blspy wrapper that tries to load shared library in case of import…

… fail

electrum_dash/blspy_wrapper.py

@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+
+import sys
+from .util import bh2u
+
+try:
+    from blspy import BasicSchemeMPL, G1Element, G2Element
+
+    import_success = True
+    load_libdashbls = False
+except ImportError:
+    import_success = False
+    load_libdashbls = True
+
+
+if load_libdashbls:
+    import ctypes
+    from ctypes import cdll, create_string_buffer, byref, c_bool
+
+    if sys.platform == 'darwin':
+        name = '/Users/pshenmic/WebstormProjects/electrum-dash/electrum_dash/libdashbls.dylib'
+    elif sys.platform in ('windows', 'win32'):
+        name = 'libdashbls-0.dll'
+    else:
+        name = 'libdashbls.so'
+
+    try:
+      ldashbls = cdll.LoadLibrary(name)
+
+      ldashbls.bls_basic_verify.argtypes = [ctypes.c_char_p, ctypes.c_bool, ctypes.c_char_p, ctypes.c_char_p]
+      ldashbls.bls_basic_verify.restype = ctypes.c_bool
+    except:
+      load_libdashbls = False
+
+if load_libdashbls:
+
+    class BasicSchemeMPL:
+        def verify(g1element, message, g2element):
+            return ldashbls.bls_basic_verify(g1element.bytes, g1element.isLegacy, g2element.bytes, message)
+
+    class G1Element:
+        bytes = b""
+        isLegacy = False
+
+        def __init__(self, bytes, isLegacy):
+            self.bytes = bytes
+            self.isLegacy = isLegacy
+
+        def from_bytes(bytes, isLegacy):
+            return G1Element(bytes, isLegacy)
+
+    class G2Element:
+        bytes = b""
+
+        def __init__(self, bytes):
+            self.bytes = bytes
+
+        def from_bytes(bytes):
+            return G2Element(bytes)
+
+if not import_success and not load_libdashbls:
+    raise ImportError('Can not import blspy')

electrum_dash/dash_ps_net.py

@@ -3,7 +3,7 @@
 import asyncio
 import time
 from enum import IntEnum
-from blspy import BasicSchemeMPL, G1Element, G2Element
+from .blspy_wrapper import BasicSchemeMPL, G1Element, G2Element
 
 from .bitcoin import address_to_script
 from .dash_msg import (DSPoolStatusUpdate, DSMessageIDs, ds_msg_str,