37 lines
745 B
Go
37 lines
745 B
Go
package whisper
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import "github.com/ethereum/go-ethereum/crypto"
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func hashTopic(topic []byte) []byte {
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return crypto.Sha3(topic)[:4]
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}
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// NOTE this isn't DRY, but I don't want to iterate twice.
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// Returns a formatted topics byte slice.
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// data: unformatted data (e.g., no hashes needed)
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func Topics(data [][]byte) [][]byte {
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d := make([][]byte, len(data))
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for i, byts := range data {
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d[i] = hashTopic(byts)
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}
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return d
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}
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func TopicsFromString(data ...string) [][]byte {
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d := make([][]byte, len(data))
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for i, str := range data {
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d[i] = hashTopic([]byte(str))
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}
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return d
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}
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func bytesToMap(s [][]byte) map[string]struct{} {
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m := make(map[string]struct{})
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for _, topic := range s {
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m[string(topic)] = struct{}{}
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}
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return m
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}
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