From 950883dc5d6417b576b2582ce45fe35b0492565e Mon Sep 17 00:00:00 2001
From: Kevin Froman <beardog@firemail.cc>
Date: Sat, 16 Feb 2019 23:20:47 -0600
Subject: [PATCH] pow changes

---
 onionr/onionrdaemontools.py | 3 ++-
 onionr/onionrexceptions.py  | 4 ++++
 onionr/onionrproofs.py      | 7 ++++---
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/onionr/onionrdaemontools.py b/onionr/onionrdaemontools.py
index 33e84b34..dace5b06 100755
--- a/onionr/onionrdaemontools.py
+++ b/onionr/onionrdaemontools.py
@@ -18,10 +18,11 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 '''
 
-import onionrexceptions, onionrpeers, onionrproofs, logger, onionrusers
+import onionrexceptions, onionrpeers, onionrproofs, logger
 import base64, sqlite3, os
 from dependencies import secrets
 from utils import netutils
+from onionrusers import onionrusers
 
 class DaemonTools:
     '''
diff --git a/onionr/onionrexceptions.py b/onionr/onionrexceptions.py
index 6763a172..b3710dbe 100755
--- a/onionr/onionrexceptions.py
+++ b/onionr/onionrexceptions.py
@@ -44,6 +44,10 @@ class PasswordStrengthError(Exception):
     pass
 
 # block exceptions
+
+class DifficultyTooLarge(Exception):
+    pass
+
 class InvalidMetadata(Exception):
     pass
 
diff --git a/onionr/onionrproofs.py b/onionr/onionrproofs.py
index 12e5615f..9fd9b648 100755
--- a/onionr/onionrproofs.py
+++ b/onionr/onionrproofs.py
@@ -69,6 +69,7 @@ def getDifficultyForNewBlock(data, ourBlock=True):
         minDifficulty = config.get('general.minimum_block_pow', 4)
 
     retData = max(minDifficulty, math.floor(dataSize / 100000)) + getDifficultyModifier()
+
     return retData
 
 def getHashDifficulty(h):
@@ -245,11 +246,10 @@ class POW:
         answer = ''
         heartbeat = 200000
         hbCount = 0
-        
+        nonce = int(binascii.hexlify(nacl.utils.random(2)), 16)
         while self.hashing:
-            rand = nacl.utils.random()
             #token = nacl.hash.blake2b(rand + self.data).decode()
-            self.metadata['powRandomToken'] = base64.b64encode(rand).decode()
+            self.metadata['powRandomToken'] = nonce
             payload = json.dumps(self.metadata).encode() + b'\n' + self.data
             token = myCore._crypto.sha3Hash(payload)
             try:
@@ -262,6 +262,7 @@ class POW:
                 iFound = True
                 self.result = payload
                 break
+            nonce += 1
                 
         if iFound:
             endTime = math.floor(time.time())