/
message_set.go
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/
message_set.go
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// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package core
import (
"fmt"
"io"
"strings"
"sync"
"github.com/mapprotocol/atlas/consensus/istanbul/validator"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/rlp"
"github.com/mapprotocol/atlas/consensus/istanbul"
)
type MessageSet interface {
fmt.Stringer
Add(msg *istanbul.Message) error
GetAddressIndex(addr common.Address) (uint64, error)
Remove(address common.Address)
Values() (result []*istanbul.Message)
Size() int
Get(addr common.Address) *istanbul.Message
Addresses() []common.Address
Serialize() ([]byte, error)
}
type messageSetImpl struct {
valSet istanbul.ValidatorSet
messagesMu *sync.Mutex
messages map[common.Address]*istanbul.Message
}
// Construct a new message set to accumulate messages for given sequence/view number.
func newMessageSet(valSet istanbul.ValidatorSet) MessageSet {
return &messageSetImpl{
messagesMu: new(sync.Mutex),
messages: make(map[common.Address]*istanbul.Message),
valSet: valSet,
}
}
func deserializeMessageSet(binaryData []byte) (MessageSet, error) {
var ms messageSetImpl
err := rlp.DecodeBytes(binaryData, &ms)
if err != nil {
return nil, err
}
return &ms, nil
}
// ----------------------------------------------------------------------------
func (ms *messageSetImpl) Add(msg *istanbul.Message) error {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
if !ms.valSet.ContainsByAddress(msg.Address) {
return istanbul.ErrUnauthorizedAddress
}
ms.messages[msg.Address] = msg
return nil
}
func (ms *messageSetImpl) GetAddressIndex(addr common.Address) (uint64, error) {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
i := ms.valSet.GetIndex(addr)
if i == -1 {
return 0, istanbul.ErrUnauthorizedAddress
}
return uint64(i), nil
}
func (ms *messageSetImpl) Remove(address common.Address) {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
delete(ms.messages, address)
}
func (ms *messageSetImpl) Values() (result []*istanbul.Message) {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
for _, v := range ms.messages {
result = append(result, v)
}
return result
}
func (ms *messageSetImpl) Size() int {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
return len(ms.messages)
}
func (ms *messageSetImpl) Get(addr common.Address) *istanbul.Message {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
return ms.messages[addr]
}
func (ms *messageSetImpl) Addresses() []common.Address {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
returnList := make([]common.Address, len(ms.messages))
i := 0
for addr := range ms.messages {
returnList[i] = addr
i++
}
return returnList
}
func (ms *messageSetImpl) String() string {
ms.messagesMu.Lock()
defer ms.messagesMu.Unlock()
addresses := make([]string, 0, len(ms.messages))
for _, v := range ms.messages {
addresses = append(addresses, v.Address.String())
}
return fmt.Sprintf("[<%v> %v]", len(ms.messages), strings.Join(addresses, ", "))
}
func (s *messageSetImpl) Serialize() ([]byte, error) {
return rlp.EncodeToBytes(s)
}
// RLP Encoding -----------------------------------------------------------------------
// EncodeRLP impl
func (s *messageSetImpl) EncodeRLP(w io.Writer) error {
serializedValSet, err := s.valSet.Serialize()
if err != nil {
return err
}
messageKeys := make([]common.Address, len(s.messages))
messageValues := make([]*istanbul.Message, len(s.messages))
i := 0
for k, v := range s.messages {
messageKeys[i] = k
messageValues[i] = v
i++
}
return rlp.Encode(w, []interface{}{
serializedValSet,
messageKeys,
messageValues,
})
}
// DecodeRLP Impl
func (s *messageSetImpl) DecodeRLP(stream *rlp.Stream) error {
var data struct {
SerializedValSet []byte
MessageKeys []common.Address
MessageValues []*istanbul.Message
}
err := stream.Decode(&data)
if err != nil {
return err
}
valSet, err := validator.DeserializeValidatorSet(data.SerializedValSet)
if err != nil {
return err
}
messages := make(map[common.Address]*istanbul.Message)
for i, addr := range data.MessageKeys {
messages[addr] = data.MessageValues[i]
}
*s = messageSetImpl{
valSet: valSet,
messages: messages,
messagesMu: new(sync.Mutex),
}
return nil
}