whisper: clean up and integrate topics

1 files changed, 0 insertions, 36 deletions

diff --git a/whisper/util.go b/whisper/util.go
deleted file mode 100644
index 7a222395f..000000000
--- a/whisper/util.go
+++ /dev/null
@@ -1,36 +0,0 @@
-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
-}