code: func (tm *transactionManager) getPeers(no *node, infoHash string) {
  	tm.sendQuery(no, getPeersType, map[string]interface{}{
  		"id":        tm.dht.id(infoHash),
  		"info_hash": infoHash,
  	})
  }
docs: // getPeers sends get_peers query to the chan.