282 lines
9.7 KiB
Nim
282 lines
9.7 KiB
Nim
# Nimbus - Ethereum Wire Protocol
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#
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# Copyright (c) 2018-2021 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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## This module implements Ethereum Wire Protocol version 67, `eth/67`.
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## Specification:
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## `eth/67 <https://github.com/ethereum/devp2p/blob/master/caps/eth.md>`_
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import
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stint,
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chronicles,
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chronos,
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eth/[common, p2p, p2p/private/p2p_types],
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stew/byteutils,
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./trace_config,
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./eth/eth_types,
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../types,
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../../utils/utils
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export
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eth_types
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logScope:
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topics = "eth67"
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static:
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const stopCompilerGossip {.used.} = Hash256().toHex
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const
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ethVersion* = 67
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prettyEthProtoName* = "[eth/" & $ethVersion & "]"
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# Pickeled tracer texts
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trEthRecvReceived* =
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"<< " & prettyEthProtoName & " Received "
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trEthRecvReceivedBlockHeaders* =
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trEthRecvReceived & "BlockHeaders (0x04)"
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trEthRecvReceivedBlockBodies* =
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trEthRecvReceived & "BlockBodies (0x06)"
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trEthRecvProtocolViolation* =
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"<< " & prettyEthProtoName & " Protocol violation, "
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trEthRecvError* =
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"<< " & prettyEthProtoName & " Error "
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trEthRecvTimeoutWaiting* =
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"<< " & prettyEthProtoName & " Timeout waiting "
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trEthRecvDiscarding* =
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"<< " & prettyEthProtoName & " Discarding "
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trEthSendSending* =
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">> " & prettyEthProtoName & " Sending "
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trEthSendSendingGetBlockHeaders* =
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trEthSendSending & "GetBlockHeaders (0x03)"
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trEthSendSendingGetBlockBodies* =
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trEthSendSending & "GetBlockBodies (0x05)"
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trEthSendReplying* =
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">> " & prettyEthProtoName & " Replying "
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trEthSendDelaying* =
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">> " & prettyEthProtoName & " Delaying "
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trEthRecvNewBlock* =
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"<< " & prettyEthProtoName & " Received NewBlock"
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trEthRecvNewBlockHashes* =
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"<< " & prettyEthProtoName & " Received NewBlockHashes"
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trEthSendNewBlock* =
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">> " & prettyEthProtoName & " Sending NewBlock"
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trEthSendNewBlockHashes* =
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">> " & prettyEthProtoName & " Sending NewBlockHashes"
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p2pProtocol eth67(version = ethVersion,
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rlpxName = "eth",
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peerState = EthPeerState,
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networkState = EthWireBase,
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useRequestIds = true):
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onPeerConnected do (peer: Peer):
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let
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network = peer.network
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ctx = peer.networkState
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status = ctx.getStatus()
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trace trEthSendSending & "Status (0x00)", peer,
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td = status.totalDifficulty,
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bestHash = short(status.bestBlockHash),
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networkId = network.networkId,
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genesis = short(status.genesisHash),
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forkHash = status.forkId.forkHash.toHex,
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forkNext = status.forkId.forkNext
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let m = await peer.status(ethVersion,
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network.networkId,
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status.totalDifficulty,
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status.bestBlockHash,
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status.genesisHash,
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status.forkId,
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timeout = chronos.seconds(10))
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when trEthTraceHandshakesOk:
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trace "Handshake: Local and remote networkId",
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local=network.networkId, remote=m.networkId
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trace "Handshake: Local and remote genesisHash",
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local=short(status.genesisHash), remote=short(m.genesisHash)
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trace "Handshake: Local and remote forkId",
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local=(status.forkId.forkHash.toHex & "/" & $status.forkId.forkNext),
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remote=(m.forkId.forkHash.toHex & "/" & $m.forkId.forkNext)
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if m.networkId != network.networkId:
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trace "Peer for a different network (networkId)", peer,
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expectNetworkId=network.networkId, gotNetworkId=m.networkId
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raise newException(
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UselessPeerError, "Eth handshake for different network")
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if m.genesisHash != status.genesisHash:
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trace "Peer for a different network (genesisHash)", peer,
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expectGenesis=short(status.genesisHash), gotGenesis=short(m.genesisHash)
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raise newException(
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UselessPeerError, "Eth handshake for different network")
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trace "Peer matches our network", peer
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peer.state.initialized = true
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peer.state.bestDifficulty = m.totalDifficulty
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peer.state.bestBlockHash = m.bestHash
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handshake:
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# User message 0x00: Status.
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proc status(peer: Peer,
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ethVersionArg: uint,
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networkId: NetworkId,
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totalDifficulty: DifficultyInt,
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bestHash: Hash256,
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genesisHash: Hash256,
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forkId: ChainForkId) =
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trace trEthRecvReceived & "Status (0x00)", peer,
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networkId, totalDifficulty, bestHash=short(bestHash), genesisHash=short(genesisHash),
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forkHash=forkId.forkHash.toHex, forkNext=forkId.forkNext
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# User message 0x01: NewBlockHashes.
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proc newBlockHashes(peer: Peer, hashes: openArray[NewBlockHashesAnnounce]) =
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when trEthTraceGossipOk:
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trace trEthRecvReceived & "NewBlockHashes (0x01)", peer,
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hashes=hashes.len
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let ctx = peer.networkState()
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ctx.handleNewBlockHashes(peer, hashes)
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# User message 0x02: Transactions.
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proc transactions(peer: Peer, transactions: openArray[Transaction]) =
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when trEthTraceGossipOk:
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trace trEthRecvReceived & "Transactions (0x02)", peer,
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transactions=transactions.len
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let ctx = peer.networkState()
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ctx.handleAnnouncedTxs(peer, transactions)
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requestResponse:
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# User message 0x03: GetBlockHeaders.
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proc getBlockHeaders(peer: Peer, request: BlocksRequest) =
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when trEthTracePacketsOk:
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trace trEthRecvReceived & "GetBlockHeaders (0x03)", peer,
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count=request.maxResults
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if request.maxResults > uint64(maxHeadersFetch):
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debug "GetBlockHeaders (0x03) requested too many headers",
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peer, requested=request.maxResults, max=maxHeadersFetch
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await peer.disconnect(BreachOfProtocol)
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return
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let ctx = peer.networkState()
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let headers = ctx.getBlockHeaders(request)
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if headers.len > 0:
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trace trEthSendReplying & "with BlockHeaders (0x04)", peer,
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sent=headers.len, requested=request.maxResults
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else:
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trace trEthSendReplying & "EMPTY BlockHeaders (0x04)", peer,
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sent=0, requested=request.maxResults
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await response.send(headers)
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# User message 0x04: BlockHeaders.
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proc blockHeaders(p: Peer, headers: openArray[BlockHeader])
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requestResponse:
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# User message 0x05: GetBlockBodies.
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proc getBlockBodies(peer: Peer, hashes: openArray[Hash256]) =
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trace trEthRecvReceived & "GetBlockBodies (0x05)", peer,
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hashes=hashes.len
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if hashes.len > maxBodiesFetch:
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debug "GetBlockBodies (0x05) requested too many bodies",
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peer, requested=hashes.len, max=maxBodiesFetch
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await peer.disconnect(BreachOfProtocol)
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return
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let ctx = peer.networkState()
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let bodies = ctx.getBlockBodies(hashes)
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if bodies.len > 0:
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trace trEthSendReplying & "with BlockBodies (0x06)", peer,
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sent=bodies.len, requested=hashes.len
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else:
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trace trEthSendReplying & "EMPTY BlockBodies (0x06)", peer,
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sent=0, requested=hashes.len
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await response.send(bodies)
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# User message 0x06: BlockBodies.
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proc blockBodies(peer: Peer, blocks: openArray[BlockBody])
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# User message 0x07: NewBlock.
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proc newBlock(peer: Peer, blk: EthBlock, totalDifficulty: DifficultyInt) =
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# (Note, needs to use `EthBlock` instead of its alias `NewBlockAnnounce`
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# because either `p2pProtocol` or RLPx doesn't work with an alias.)
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when trEthTraceGossipOk:
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trace trEthRecvReceived & "NewBlock (0x07)", peer,
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totalDifficulty,
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blockNumber = blk.header.blockNumber,
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blockDifficulty = blk.header.difficulty
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let ctx = peer.networkState()
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ctx.handleNewBlock(peer, blk, totalDifficulty)
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# User message 0x08: NewPooledTransactionHashes.
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proc newPooledTransactionHashes(peer: Peer, txHashes: openArray[Hash256]) =
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when trEthTraceGossipOk:
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trace trEthRecvReceived & "NewPooledTransactionHashes (0x08)", peer,
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hashes=txHashes.len
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let ctx = peer.networkState()
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ctx.handleAnnouncedTxsHashes(peer, txHashes)
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requestResponse:
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# User message 0x09: GetPooledTransactions.
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proc getPooledTransactions(peer: Peer, txHashes: openArray[Hash256]) =
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trace trEthRecvReceived & "GetPooledTransactions (0x09)", peer,
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hashes=txHashes.len
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let ctx = peer.networkState()
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let txs = ctx.getPooledTxs(txHashes)
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if txs.len > 0:
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trace trEthSendReplying & "with PooledTransactions (0x0a)", peer,
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sent=txs.len, requested=txHashes.len
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else:
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trace trEthSendReplying & "EMPTY PooledTransactions (0x0a)", peer,
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sent=0, requested=txHashes.len
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await response.send(txs)
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# User message 0x0a: PooledTransactions.
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proc pooledTransactions(peer: Peer, transactions: openArray[Transaction])
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# User message 0x0d: GetNodeData -- removed, was so 66ish
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# User message 0x0e: NodeData -- removed, was so 66ish
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nextId 0x0f
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requestResponse:
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# User message 0x0f: GetReceipts.
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proc getReceipts(peer: Peer, hashes: openArray[Hash256]) =
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trace trEthRecvReceived & "GetReceipts (0x0f)", peer,
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hashes=hashes.len
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let ctx = peer.networkState()
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let rec = ctx.getReceipts(hashes)
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if rec.len > 0:
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trace trEthSendReplying & "with Receipts (0x10)", peer,
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sent=rec.len, requested=hashes.len
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else:
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trace trEthSendReplying & "EMPTY Receipts (0x10)", peer,
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sent=0, requested=hashes.len
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await response.send(rec)
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# User message 0x10: Receipts.
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proc receipts(peer: Peer, receipts: openArray[seq[Receipt]])
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