plugeth/ethchain/bloom9.go
2014-10-27 11:22:27 +01:00

39 lines
624 B
Go

package ethchain
import "github.com/ethereum/go-ethereum/vm"
func CreateBloom(txs Transactions) uint64 {
var bin uint64
for _, tx := range txs {
bin |= logsBloom(tx.logs)
}
return bin
}
func logsBloom(logs []vm.Log) uint64 {
var bin uint64
for _, log := range logs {
data := []byte{log.Address}
for _, topic := range log.Topics {
data = append(data, topic.Bytes())
}
data = append(data, log.Data)
for _, b := range data {
bin |= bloom9(b)
}
}
return bin
}
func bloom9(b []byte) uint64 {
var r uint64
for _, i := range []int{0, 2, 4} {
r |= 1 << (b[i+1] + 256*(b[i]&1))
}
return r
}