Official Go implementation of the Ethereum protocol
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 
go-ethereum/whisper/util.go

36 lines
745 B

package whisper
import "github.com/ethereum/go-ethereum/crypto"
func hashTopic(topic []byte) []byte {
return crypto.Sha3(topic)[:4]
}
// NOTE this isn't DRY, but I don't want to iterate twice.
// Returns a formatted topics byte slice.
// data: unformatted data (e.g., no hashes needed)
func Topics(data [][]byte) [][]byte {
d := make([][]byte, len(data))
for i, byts := range data {
d[i] = hashTopic(byts)
}
return d
}
func TopicsFromString(data ...string) [][]byte {
d := make([][]byte, len(data))
for i, str := range data {
d[i] = hashTopic([]byte(str))
}
return d
}
func bytesToMap(s [][]byte) map[string]struct{} {
m := make(map[string]struct{})
for _, topic := range s {
m[string(topic)] = struct{}{}
}
return m
}