There are many variations of the Cuckoo Cycle algorithm - here only the ones
that are needed are implemented. Cuckatoo32 probably should be implemented
as well for Grin. The differences for each variation are as follows (along with
header generation):
- Aeternity uses Cuckoo29 with a legacy version of the
sipnodehasher -
the only functional difference is theROTLon thehasher.XorLanes()response (current versions of cuckoo do not do this)
func generateHeader(hash []byte, nonce uint64) []byte {
nonceBytes := make([]byte, 8)
binary.LittleEndian.PutUint64(nonceBytes, nonce)
hashEncoded := []byte(base64.StdEncoding.EncodeToString(hash))
nonceEncoded := []byte(base64.StdEncoding.EncodeToString(nonceBytes))
header := append(hashEncoded, append(nonceEncoded, make([]byte, 24)...)...)
return header
}- Cortex uses Cuckaroo30 with a single difference - the
sipblockhasher usessiphash48instead ofsiphash24.
func generateHeader(hash []byte, nonce uint64) []byte {
nonceBytes := make([]byte, 8)
binary.LittleEndian.PutUint64(nonceBytes, nonce)
header := append(hash, nonceBytes...)
return header
}