mirror of https://github.com/poanetwork/quorum.git
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package types
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/crypto"
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)
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type bytesBacked interface {
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Bytes() []byte
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}
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func CreateBloom(receipts Receipts) Bloom {
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bin := new(big.Int)
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for _, receipt := range receipts {
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bin.Or(bin, LogsBloom(receipt.logs))
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}
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return BytesToBloom(bin.Bytes())
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}
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func LogsBloom(logs state.Logs) *big.Int {
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bin := new(big.Int)
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for _, log := range logs {
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data := make([]common.Hash, len(log.Topics))
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bin.Or(bin, bloom9(log.Address.Bytes()))
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for i, topic := range log.Topics {
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data[i] = topic
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}
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for _, b := range data {
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bin.Or(bin, bloom9(b[:]))
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}
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}
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return bin
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}
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func bloom9(b []byte) *big.Int {
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b = crypto.Sha3(b[:])
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r := new(big.Int)
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for i := 0; i < 6; i += 2 {
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t := big.NewInt(1)
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b := (uint(b[i+1]) + (uint(b[i]) << 8)) & 2047
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r.Or(r, t.Lsh(t, b))
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}
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return r
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}
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var Bloom9 = bloom9
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func BloomLookup(bin Bloom, topic bytesBacked) bool {
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bloom := bin.Big()
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cmp := bloom9(topic.Bytes()[:])
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return bloom.And(bloom, cmp).Cmp(cmp) == 0
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}
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