contrib: add getcoins.py script to get coins from (signet) faucet

contrib/signet/getcoins.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+# Copyright (c) 2020 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+import argparse
+import subprocess
+import requests
+import sys
+
+parser = argparse.ArgumentParser(description='Script to get coins from a faucet.', epilog='You may need to start with double-dash (--) when providing bitcoin-cli arguments.')
+parser.add_argument('-c', '--cmd', dest='cmd', default='bitcoin-cli', help='bitcoin-cli command to use')
+parser.add_argument('-f', '--faucet', dest='faucet', default='https://signetfaucet.com/claim', help='URL of the faucet')
+parser.add_argument('-a', '--addr', dest='addr', default='', help='Bitcoin address to which the faucet should send')
+parser.add_argument('-p', '--password', dest='password', default='', help='Faucet password, if any')
+parser.add_argument('bitcoin_cli_args', nargs='*', help='Arguments to pass on to bitcoin-cli (default: -signet)')
+
+args = parser.parse_args()
+
+if args.addr == '':
+    if args.bitcoin_cli_args == []:
+        args.bitcoin_cli_args = ['-signet']
+    # get address for receiving coins
+    try:
+        args.addr = subprocess.check_output([args.cmd] + args.bitcoin_cli_args + ['getnewaddress', 'faucet', 'bech32']).strip()
+    except FileNotFoundError:
+        print('The binary', args.cmd, 'could not be found.')
+        exit()
+
+data = {'address': args.addr, 'password': args.password}
+try:
+    res = requests.post(args.faucet, data=data)
+except:
+    print('Unexpected error when contacting faucet:', sys.exc_info()[0])
+    exit()
+print(res.text)