plugeth/whisper/util.go

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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
}