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123 lines
3.4 KiB
123 lines
3.4 KiB
// 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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// go-ethereum 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 eth
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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/types"
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)
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// Supported versions of the eth protocol (first is primary).
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var ProtocolVersions = []uint{61, 60}
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// Number of implemented message corresponding to different protocol versions.
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var ProtocolLengths = []uint64{9, 8}
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const (
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NetworkId = 1
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ProtocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a protocol message
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)
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// eth protocol message codes
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const (
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StatusMsg = iota
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NewBlockHashesMsg
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TxMsg
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GetBlockHashesMsg
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BlockHashesMsg
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GetBlocksMsg
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BlocksMsg
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NewBlockMsg
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GetBlockHashesFromNumberMsg
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)
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type errCode int
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const (
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ErrMsgTooLarge = iota
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ErrDecode
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ErrInvalidMsgCode
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ErrProtocolVersionMismatch
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ErrNetworkIdMismatch
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ErrGenesisBlockMismatch
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ErrNoStatusMsg
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ErrExtraStatusMsg
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ErrSuspendedPeer
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)
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func (e errCode) String() string {
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return errorToString[int(e)]
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}
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// XXX change once legacy code is out
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var errorToString = map[int]string{
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ErrMsgTooLarge: "Message too long",
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ErrDecode: "Invalid message",
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ErrInvalidMsgCode: "Invalid message code",
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ErrProtocolVersionMismatch: "Protocol version mismatch",
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ErrNetworkIdMismatch: "NetworkId mismatch",
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ErrGenesisBlockMismatch: "Genesis block mismatch",
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ErrNoStatusMsg: "No status message",
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ErrExtraStatusMsg: "Extra status message",
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ErrSuspendedPeer: "Suspended peer",
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}
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type txPool interface {
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// AddTransactions should add the given transactions to the pool.
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AddTransactions([]*types.Transaction)
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// GetTransactions should return pending transactions.
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// The slice should be modifiable by the caller.
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GetTransactions() types.Transactions
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}
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type chainManager interface {
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GetBlockHashesFromHash(hash common.Hash, amount uint64) (hashes []common.Hash)
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GetBlock(hash common.Hash) (block *types.Block)
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Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash)
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}
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// statusData is the network packet for the status message.
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type statusData struct {
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ProtocolVersion uint32
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NetworkId uint32
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TD *big.Int
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CurrentBlock common.Hash
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GenesisBlock common.Hash
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}
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// getBlockHashesData is the network packet for the hash based block retrieval
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// message.
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type getBlockHashesData struct {
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Hash common.Hash
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Amount uint64
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}
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// getBlockHashesFromNumberData is the network packet for the number based block
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// retrieval message.
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type getBlockHashesFromNumberData struct {
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Number uint64
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Amount uint64
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}
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// newBlockData is the network packet for the block propagation message.
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type newBlockData struct {
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Block *types.Block
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TD *big.Int
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}
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