86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
# Electrum - Lightweight Bitcoin Client
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# Copyright (c) 2015 Thomas Voegtlin
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import sys
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import re
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import dns
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import bitcoin
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import dnssec
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from util import StoreDict, print_error
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from i18n import _
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class Contacts(StoreDict):
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def __init__(self, config):
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StoreDict.__init__(self, config, 'contacts')
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def resolve(self, k):
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if bitcoin.is_address(k):
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return {
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'address': k,
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'type': 'address'
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}
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if k in self.keys():
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_type, addr = self[k]
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if _type == 'address':
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return {
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'address': addr,
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'type': 'contact'
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}
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out = self.resolve_openalias(k)
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if out:
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address, name, validated = out
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return {
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'address': address,
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'name': name,
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'type': 'openalias',
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'validated': validated
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}
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raise Exception("Invalid Bitcoin address or alias", k)
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def resolve_openalias(self, url):
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# support email-style addresses, per the OA standard
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url = url.replace('@', '.')
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records, validated = dnssec.query(url, dns.rdatatype.TXT)
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prefix = 'btc'
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for record in records:
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string = record.strings[0]
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if string.startswith('oa1:' + prefix):
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address = self.find_regex(string, r'recipient_address=([A-Za-z0-9]+)')
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name = self.find_regex(string, r'recipient_name=([^;]+)')
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if not name:
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name = address
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if not address:
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continue
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return address, name, validated
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def find_regex(self, haystack, needle):
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regex = re.compile(needle)
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try:
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return regex.search(haystack).groups()[0]
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except AttributeError:
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return None
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