plugeth/ethchain/bloom9.go
obscuren fb4113dab4 PoC 7 updates
* Bloom
* Block restructure
* Receipts
2014-10-29 10:34:40 +01:00

46 lines
768 B
Go

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