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authorobscuren <geffobscura@gmail.com>2014-12-15 23:13:08 +0800
committerobscuren <geffobscura@gmail.com>2014-12-15 23:13:08 +0800
commitdb89c3e1a34459a0f65d7b86e696df4afc9518b6 (patch)
tree400304902fee8bd4b885ea29a373d8e0271cb860 /whisper
parent56dac74f71d4d1fffa3e240c7d3cee803dec788d (diff)
parentef4135eabe5cb25f8972371c5681e1611ce0cde9 (diff)
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Merge branch 'develop' into poc8
Diffstat (limited to 'whisper')
-rw-r--r--whisper/util.go27
1 files changed, 27 insertions, 0 deletions
diff --git a/whisper/util.go b/whisper/util.go
new file mode 100644
index 000000000..abef1d667
--- /dev/null
+++ b/whisper/util.go
@@ -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
+}