enhance contribs to allow to connect to an external server

contrib/.gitignore

@@ -0,0 +1 @@
+.venv

contrib/get_tx.py

@@ -5,10 +5,11 @@ import json
 
 def main():
     parser = argparse.ArgumentParser()
+    parser.add_argument('--host', default='localhost')
     parser.add_argument("txid")
     args = parser.parse_args()
 
-    conn = client.Client(("localhost", 50001))
+    conn = client.Client((args.host, 50001))
     tx, = conn.call([client.request("blockchain.transaction.get", args.txid, True)])
     print(json.dumps(tx))
 

contrib/history.py

@@ -5,7 +5,6 @@ import hashlib
 import io
 import sys
 
-import pycoin
 from logbook import Logger, StreamHandler
 import prettytable
 
@@ -30,6 +29,7 @@ def show_rows(rows, field_names):
 
 def main():
     parser = argparse.ArgumentParser()
+    parser.add_argument('--host', default='localhost')
     parser.add_argument('--network', default='mainnet')
     parser.add_argument('address', nargs='+')
     args = parser.parse_args()
@@ -46,14 +46,14 @@ def main():
     else:
         raise ValueError(f"unknown network: {args.network}")
 
-    hostport = ('localhost', port)
+    hostport = (args.host, port)
     log.info('connecting to {}:{}', *hostport)
     conn = client.Client(hostport)
 
     tip, = conn.call([client.request('blockchain.headers.subscribe')])
 
     script_hashes = [
-        _script_hash(network.parse.address(addr).script()) 
+        _script_hash(network.parse.address(addr).script())
         for addr in args.address
     ]
 

contrib/history.sh

@@ -1,4 +1,18 @@
 #!/bin/bash
 set -eu
-cd `dirname $0`
-.env/bin/python history.py $*
+
+cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
+
+venv=false
+if [ "$1" = "--venv" ];
+then
+    shift
+    venv=true
+fi
+
+if [ $venv = true ] && [ ! -d .venv ]; then
+    virtualenv .venv
+    .venv/bin/pip install pycoin logbook prettytable
+fi
+
+exec .venv/bin/python history.py "$@"

contrib/tx_fee.py

@@ -4,10 +4,11 @@ import client
 
 def main():
     parser = argparse.ArgumentParser()
+    parser.add_argument('--host', default='localhost')
     parser.add_argument("txid")
     args = parser.parse_args()
 
-    conn = client.Client(("localhost", 50001))
+    conn = client.Client((args.host, 50001))
     tx, = conn.call([client.request("blockchain.transaction.get", args.txid, True)])
     requests = []
     for vin in tx["vin"]:

contrib/xpub.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+import argparse
 import hashlib
 import sys
 
@@ -10,11 +11,20 @@ import client
 
 log = Logger("xpub")
 
+
 def main():
-    conn = client.Client(('localhost', 50001))
-    xpub, = sys.argv[1:]
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--host', default='localhost')
+    parser.add_argument('xpub')
+    args = parser.parse_args()
+
+    conn = client.Client((args.host, 50001))
     total = 0
-    xpub = network.parse.bip32_pub(xpub)
+    xpub = network.parse.bip32(args.xpub)
+
+    if xpub is None:
+        log.error('Invalid BIP32 pub key %s' % args.xpub)
+        sys.exit(1)
 
     for change in (0, 1):
         empty = 0

doc/usage.md

@@ -476,10 +476,10 @@ $ echo '{"jsonrpc": "2.0", "method": "server.version", "params": ["", "1.4"], "i
 
 For more complex tasks, you may need to convert addresses to 
 [script hashes](https://electrumx-spesmilo.readthedocs.io/en/latest/protocol-basics.html#script-hashes) - see 
-[contrib/addr.py](https://github.com/romanz/electrs/blob/master/contrib/addr.py) for getting an address balance and history:
+[contrib/history.py](https://github.com/romanz/electrs/blob/master/contrib/history.py) for getting an address balance and history:
 
 ```
-$ ./contrib/history.sh 144STc7gcb9XCp6t4hvrcUEKg9KemivsCR
+$ ./contrib/history.sh --venv 144STc7gcb9XCp6t4hvrcUEKg9KemivsCR
 [2021-08-18 13:56:40.254317] INFO: electrum: connecting to localhost:50001
 [2021-08-18 13:56:40.574461] INFO: electrum: subscribed to 1 scripthashes
 [2021-08-18 13:56:40.645072] DEBUG: electrum:         0.00000 mBTC (total)