2015-07-02 03:44:53 -07:00
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import sys
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import re
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import dns
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import traceback
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import bitcoin
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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 = out
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2015-07-08 06:14:00 -07:00
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validated = False
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2015-07-02 03:44:53 -07:00
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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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'''Resolve OpenAlias address using url.'''
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print_error('[OA] Attempting to resolve OpenAlias data for ' + url)
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url = url.replace('@', '.') # support email-style addresses, per the OA standard
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prefix = 'btc'
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retries = 3
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err = None
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for i in range(0, retries):
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try:
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resolver = dns.resolver.Resolver()
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resolver.timeout = 2.0
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resolver.lifetime = 4.0
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records = resolver.query(url, dns.rdatatype.TXT)
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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)
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err = _('No OpenAlias record found.')
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break
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except dns.resolver.NXDOMAIN:
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err = _('No such domain.')
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continue
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except dns.resolver.Timeout:
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err = _('Timed out while resolving.')
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continue
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except DNSException:
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err = _('Unhandled exception.')
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continue
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except Exception, e:
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err = _('Unexpected error: ' + str(e))
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continue
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break
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if err:
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print_error(err)
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return 0
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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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