Bug in "lookupBlock(...)" function

[BorMor]

async def lookupBlock(self, workchain, shard, seqno=None, lt=None, unixtime=None):
    assert seqno or lt or unixtime, "Seqno, LT or unixtime should be defined"
    mode = 0
    if seqno:
        mode += 1
    if lt:
        mode += 2
     if unixtime:
        mode += 3 <<<<< THERE

It have to be

    if unixtime:
        mode += 4

Related code from litesever.cpp

void LiteQuery::perform_lookupBlock(BlockId blkid, int mode, LogicalTime lt, UnixTime utime) {
  if (!((1 << (mode & 7)) & 0x16)) {
    fatal_error("exactly one of mode.0, mode.1 and mode.2 bits must be set");
    return;
  }
  if (!(mode & 2)) {
    lt = 0;
  }
  if (!(mode & 4)) {
    utime = 0;
  }

[dungeon-master-666]

Nice find, thanks! Fixed in PR #9