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| author | Taylor Gerring <taylor.gerring@gmail.com> | 2014-12-22 01:42:32 +0800 |
|---|---|---|
| committer | Taylor Gerring <taylor.gerring@gmail.com> | 2014-12-22 01:42:32 +0800 |
| commit | 1360f027d9e365242466ca346b2b56f421729d91 (patch) | |
| tree | a30ff7292e87583781b682b47d851d0f6e1925fc /whisper/util.go | |
| parent | b3629c6f62bd3774eb8858819a8ee07dfb775b73 (diff) | |
| parent | 795b14330ad4399ef292835eac452d258dcd7464 (diff) | |
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Merge pull request #216 from ethereum/develop
Update tests branch from develop
Diffstat (limited to 'whisper/util.go')
| -rw-r--r-- | whisper/util.go | 27 |
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 +} |