def liststreamitems_alias():
"""
Sample stream item (none verbose):
{
'blocktime': 1505905511,
'confirmations': 28948,
'data': '4d696e65722031',
'key': 'Miner_1',
'publishers': ['1899xJpqZN3kMQdpvTxESWqykxgFJwRddCE4Tr'],
'txid': 'caa1155e719803b9f39096860519a5e08e78214245ae9822beeea2b37a656178'
}
"""
client = get_active_rpc_client()
# TODO read and process only fresh stream data by storing a state cursor between runs
# TODO read stream items 100 at a time
stream_items = client.liststreamitems(Stream.alias.name, count=100000)
if not stream_items['result']:
log.debug('got no items from stream alias')
return 0
by_addr = {} # address -> alias
reseved = set() # reserved aliases
# aggregate the final state of address to alias mappings from stream
for item in stream_items['result']:
confirmations = item['confirmations']
alias = item['key']
address = item['publishers'][0]
data = item['data']
num_publishers = len(item['publishers'])
# Sanity checks
if confirmations < 1:
log.debug('ignore alias - 0 confirmations for %s -> %s' %
(address, alias))
continue
if data:
log.debug('ignore alias - alias item "%s" with data "%s..."' %
(alias, data[:8]))
continue
if not is_valid_username(alias):
log.debug('ignore alias - alias does not match our regex: %s' %
alias)
continue
if num_publishers != 1:
log.debug('ignore alias - alias has multiple publishers: %s' %
alias)
continue
if alias in reseved:
log.debug('ignore alias - alias "%s" already reserved by "%s"' %
(alias, address))
continue
is_new_address = address not in by_addr
if is_new_address:
by_addr[address] = alias
reseved.add(alias)
continue
is_alias_change = by_addr[address] != alias
if is_alias_change:
log.debug('change alias of %s from %s to %s' %
(address, by_addr[address], alias))
# reserve new name
reseved.add(alias)
# release old name
reseved.remove(by_addr[address])
# set new name
by_addr[address] = alias
continue
# update database
profile = Profile.get_active()
new_main_alias = by_addr.get(profile.address)
if new_main_alias and profile.alias != new_main_alias:
log.debug('sync found new alias. profile.alias from %s to %s' %
(profile.alias, new_main_alias))
profile.alias = new_main_alias
profile.save()
with data_db.atomic():
old_addrs = set(
Address.select(Address.address, Address.alias).tuples())
new_addrs = set(by_addr.items())
# set of elements that are only in new_addr but not in old_addr
changed_addrs = new_addrs - old_addrs
new_rows = [dict(address=i[0], alias=i[1]) for i in changed_addrs]
if new_rows:
log.debug('adding new aliases %s' % changed_addrs)
# insert rows 100 at a time.
for idx in range(0, len(new_rows), 100):
Address.insert_many(new_rows[idx:idx +
100]).upsert(True).execute()
return len(changed_addrs)
