func hash(seed uint32, c *cid.Cid) uint32 {
var buf [4]byte
binary.LittleEndian.PutUint32(buf[:], seed)
h := fnv.New32a()
_, _ = h.Write(buf[:])
_, _ = h.Write(c.Bytes())
return h.Sum32()
}
func CidToDsKey(k *cid.Cid) ds.Key {
return NewKeyFromBinary(k.Bytes())
}