Official Go implementation of the Ethereum protocol
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go-ethereum/eth/protocols/snap/peer.go

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// Copyright 2020 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 snap
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
)
// Peer is a collection of relevant information we have about a `snap` peer.
type Peer struct {
id string // Unique ID for the peer, cached
*p2p.Peer // The embedded P2P package peer
rw p2p.MsgReadWriter // Input/output streams for snap
version uint // Protocol version negotiated
logger log.Logger // Contextual logger with the peer id injected
}
// NewPeer create a wrapper for a network connection and negotiated protocol
// version.
func NewPeer(version uint, p *p2p.Peer, rw p2p.MsgReadWriter) *Peer {
id := p.ID().String()
return &Peer{
id: id,
Peer: p,
rw: rw,
version: version,
logger: log.New("peer", id[:8]),
}
}
// NewFakePeer create a fake snap peer without a backing p2p peer, for testing purposes.
func NewFakePeer(version uint, id string, rw p2p.MsgReadWriter) *Peer {
return &Peer{
id: id,
rw: rw,
version: version,
logger: log.New("peer", id[:8]),
}
}
// ID retrieves the peer's unique identifier.
func (p *Peer) ID() string {
return p.id
}
// Version retrieves the peer's negotiated `snap` protocol version.
func (p *Peer) Version() uint {
return p.version
}
// Log overrides the P2P logger with the higher level one containing only the id.
func (p *Peer) Log() log.Logger {
return p.logger
}
// RequestAccountRange fetches a batch of accounts rooted in a specific account
// trie, starting with the origin.
func (p *Peer) RequestAccountRange(id uint64, root common.Hash, origin, limit common.Hash, bytes uint64) error {
p.logger.Trace("Fetching range of accounts", "reqid", id, "root", root, "origin", origin, "limit", limit, "bytes", common.StorageSize(bytes))
requestTracker.Track(p.id, p.version, GetAccountRangeMsg, AccountRangeMsg, id)
return p2p.Send(p.rw, GetAccountRangeMsg, &GetAccountRangePacket{
ID: id,
Root: root,
Origin: origin,
Limit: limit,
Bytes: bytes,
})
}
// RequestStorageRanges fetches a batch of storage slots belonging to one or more
// accounts. If slots from only one account is requested, an origin marker may also
// be used to retrieve from there.
func (p *Peer) RequestStorageRanges(id uint64, root common.Hash, accounts []common.Hash, origin, limit []byte, bytes uint64) error {
if len(accounts) == 1 && origin != nil {
p.logger.Trace("Fetching range of large storage slots", "reqid", id, "root", root, "account", accounts[0], "origin", common.BytesToHash(origin), "limit", common.BytesToHash(limit), "bytes", common.StorageSize(bytes))
} else {
p.logger.Trace("Fetching ranges of small storage slots", "reqid", id, "root", root, "accounts", len(accounts), "first", accounts[0], "bytes", common.StorageSize(bytes))
}
requestTracker.Track(p.id, p.version, GetStorageRangesMsg, StorageRangesMsg, id)
return p2p.Send(p.rw, GetStorageRangesMsg, &GetStorageRangesPacket{
ID: id,
Root: root,
Accounts: accounts,
Origin: origin,
Limit: limit,
Bytes: bytes,
})
}
// RequestByteCodes fetches a batch of bytecodes by hash.
func (p *Peer) RequestByteCodes(id uint64, hashes []common.Hash, bytes uint64) error {
p.logger.Trace("Fetching set of byte codes", "reqid", id, "hashes", len(hashes), "bytes", common.StorageSize(bytes))
requestTracker.Track(p.id, p.version, GetByteCodesMsg, ByteCodesMsg, id)
return p2p.Send(p.rw, GetByteCodesMsg, &GetByteCodesPacket{
ID: id,
Hashes: hashes,
Bytes: bytes,
})
}
// RequestTrieNodes fetches a batch of account or storage trie nodes rooted in
// a specific state trie.
func (p *Peer) RequestTrieNodes(id uint64, root common.Hash, paths []TrieNodePathSet, bytes uint64) error {
p.logger.Trace("Fetching set of trie nodes", "reqid", id, "root", root, "pathsets", len(paths), "bytes", common.StorageSize(bytes))
requestTracker.Track(p.id, p.version, GetTrieNodesMsg, TrieNodesMsg, id)
return p2p.Send(p.rw, GetTrieNodesMsg, &GetTrieNodesPacket{
ID: id,
Root: root,
Paths: paths,
Bytes: bytes,
})
}