Add vanity address generator to tools

assets/tools/vanity_address_gen.py

@@ -0,0 +1,80 @@
+from ravenrpc import Ravencoin # pip install ravenrpc
+import sys
+import os
+import time
+
+def valid_base58(s):
+    for c in ('0', 'O', 'l', '1'):
+        if c in s:
+            print(f'Cannot use charachter "{c}" in prefix!!')
+            exit()
+
+def success_odds(prefix, ignore_case):
+    odds = 1
+    for letter in prefix[1:]:
+        if letter in ('o', 'l') or not ignore_case:
+            odds *= 58
+        else:
+            odds *= 29
+    return odds
+
+def create_rvn_inst():
+    try:
+        rvn = Ravencoin(sys.argv[1], sys.argv[2])
+    except IndexError:
+        print('You must provide a valid rpc username and rpc password!')
+        exit()
+    return rvn
+
+def get_args():
+    try:
+        prefix = sys.argv[3]
+    except IndexError:
+        print('Missing options!\n'
+            'Usage: `python gen.py <rpcuser> <rpcpass> <prefix> <ignore case (default True)>`')
+        exit()
+    ignore_case = sys.argv[4] if len(sys.argv) > 4 else True
+    if prefix[0] != 'R':
+        print('Please start your prefix with an "R"\n'
+            'Usage: `python gen.py <rpcuser> <rpcpass> <prefix> <ignore case (default True)>`')
+        exit()
+    return prefix, ignore_case, create_rvn_inst()
+
+def validate_rvn(rvn):
+    if rvn.getinfo() == '':
+        print('Run ravend')
+        exit()
+
+def display_stats(count, start, addr, prefix, odds):
+    addr_sec = count/(time.time() - start)
+    os.system('cls' if os.name == 'nt' else 'clear')
+    print(f'Tried {count} addresses\n'
+          f'Seconds Spent: {time.time() - start}\n'
+          f'Ave. Addresses/sec: {addr_sec}\n'
+          f'Lastest Address: {addr}\n'
+          f'Prefix: {prefix}\n'
+          f'You have a 1 in {odds} chance per address!\n'
+          f'At this rate, you will find your address in ~{odds/addr_sec/60} minutes!\n'
+          'To stop, press Ctrl-C', flush=True, end='')
+
+
+def main():
+    prefix, ignore_case, rvn = get_args()
+    validate_rvn(rvn)
+    valid_base58(prefix)
+    start = time.time()
+    odds = success_odds(prefix, ignore_case)
+    count = 0
+    address = rvn.getnewaddress()['result']
+    try:
+        while not address.lower().startswith(prefix.lower()) if ignore_case else address.startswith(prefix):
+            address = rvn.getnewaddress()['result']
+            count += 1
+            if count % 100 == 1:
+                display_stats(count, start, address, prefix, odds)
+    except KeyboardInterrupt:
+        exit()
+    print(f'\nFound an address that starts with {prefix}!\n It is saved to your wallet. Use it freely!\n{address}')
+
+if __name__ == '__main__':
+    main()