54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
// Copyright 2017 AMIS Technologies
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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 container
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/istanbul"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto/sha3"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/jpmorganchase/istanbul-tools/cmd/istanbul/extra"
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)
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func sigHash(header *types.Header) (hash common.Hash) {
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hasher := sha3.NewKeccak256()
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// Clean seal is required for calculating proposer seal.
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rlp.Encode(hasher, types.IstanbulFilteredHeader(header, false))
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hasher.Sum(hash[:0])
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return hash
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}
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func GetProposer(header *types.Header) common.Address {
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if header == nil {
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return common.Address{}
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}
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_, istanbulExtra, err := extra.Decode(common.ToHex(header.Extra))
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if err != nil {
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return common.Address{}
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}
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addr, err := istanbul.GetSignatureAddress(sigHash(header).Bytes(), istanbulExtra.Seal)
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if err != nil {
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return common.Address{}
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}
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return addr
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}
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