Added topic utility functions to whisper

This commit is contained in:
obscuren 2014-12-15 16:12:34 +01:00
parent c3ba4ace64
commit ef4135eabe

27
whisper/util.go Normal file
View File

@ -0,0 +1,27 @@
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
}