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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// go-ethereum 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 eth
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// Supported versions of the eth protocol (first is primary).
var ProtocolVersions = []uint{61, 60}
// Number of implemented message corresponding to different protocol versions.
var ProtocolLengths = []uint64{9, 8}
const (
NetworkId = 0
ProtocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a protocol message
)
// eth protocol message codes
const (
StatusMsg = iota
NewBlockHashesMsg
TxMsg
GetBlockHashesMsg
BlockHashesMsg
GetBlocksMsg
BlocksMsg
NewBlockMsg
GetBlockHashesFromNumberMsg
)
type errCode int
const (
ErrMsgTooLarge = iota
ErrDecode
ErrInvalidMsgCode
ErrProtocolVersionMismatch
ErrNetworkIdMismatch
ErrGenesisBlockMismatch
ErrNoStatusMsg
ErrExtraStatusMsg
ErrSuspendedPeer
)
func (e errCode) String() string {
return errorToString[int(e)]
}
// XXX change once legacy code is out
var errorToString = map[int]string{
ErrMsgTooLarge: "Message too long",
ErrDecode: "Invalid message",
ErrInvalidMsgCode: "Invalid message code",
ErrProtocolVersionMismatch: "Protocol version mismatch",
ErrNetworkIdMismatch: "NetworkId mismatch",
ErrGenesisBlockMismatch: "Genesis block mismatch",
ErrNoStatusMsg: "No status message",
ErrExtraStatusMsg: "Extra status message",
ErrSuspendedPeer: "Suspended peer",
}
type txPool interface {
// AddTransactions should add the given transactions to the pool.
AddTransactions([]*types.Transaction)
// GetTransactions should return pending transactions.
// The slice should be modifiable by the caller.
GetTransactions() types.Transactions
}
type chainManager interface {
GetBlockHashesFromHash(hash common.Hash, amount uint64) (hashes []common.Hash)
GetBlock(hash common.Hash) (block *types.Block)
Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
}
// statusData is the network packet for the status message.
type statusData struct {
ProtocolVersion uint32
NetworkId uint32
TD *big.Int
CurrentBlock common.Hash
GenesisBlock common.Hash
}
// getBlockHashesData is the network packet for the hash based block retrieval
// message.
type getBlockHashesData struct {
Hash common.Hash
Amount uint64
}
// getBlockHashesFromNumberData is the network packet for the number based block
// retrieval message.
type getBlockHashesFromNumberData struct {
Number uint64
Amount uint64
}
// newBlockData is the network packet for the block propagation message.
type newBlockData struct {
Block *types.Block
TD *big.Int
}
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