nimbus-eth1/fluffy/rpc/rpc_portal_api.nim

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# Nimbus
# Copyright (c) 2021-2023 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [].}
import
std/sequtils,
json_rpc/[rpcproxy, rpcserver], stew/byteutils,
eth/p2p/discoveryv5/nodes_verification,
../network/wire/portal_protocol,
./rpc_types
export rpcserver
# Portal Network JSON-RPC impelentation as per specification:
# https://github.com/ethereum/portal-network-specs/tree/master/jsonrpc
type
ContentInfo = object
content: string
utpTransfer: bool
# Note:
# Using a string for the network parameter will give an error in the rpc macro:
# Error: Invalid node kind nnkInfix for macros.`$`
# Using a static string works but some sandwich problem seems to be happening,
# as the proc becomes generic, where the rpc macro from router.nim can no longer
# be found, which is why we export rpcserver which should export router.
proc installPortalApiHandlers*(
rpcServer: RpcServer|RpcProxy, p: PortalProtocol, network: static string)
{.raises: [CatchableError].} =
rpcServer.rpc("portal_" & network & "NodeInfo") do() -> NodeInfo:
return p.routingTable.getNodeInfo()
rpcServer.rpc("portal_" & network & "RoutingTableInfo") do() -> RoutingTableInfo:
return getRoutingTableInfo(p.routingTable)
rpcServer.rpc("portal_" & network & "AddEnr") do(enr: Record) -> bool:
let node = newNode(enr).valueOr:
raise newException(ValueError, "Failed creating Node from ENR")
let addResult = p.addNode(node)
p.routingTable.setJustSeen(node)
return addResult == Added
rpcServer.rpc("portal_" & network & "AddEnrs") do(enrs: seq[Record]) -> bool:
# Note: unspecified RPC, but useful for our local testnet test
for enr in enrs:
let nodeRes = newNode(enr)
if nodeRes.isOk():
let node = nodeRes.get()
discard p.addNode(node)
p.routingTable.setJustSeen(node)
return true
rpcServer.rpc("portal_" & network & "GetEnr") do(nodeId: NodeId) -> Record:
if p.localNode.id == nodeId:
return p.localNode.record
let node = p.getNode(nodeId)
if node.isSome():
return node.get().record
else:
raise newException(ValueError, "Record not in local routing table.")
rpcServer.rpc("portal_" & network & "DeleteEnr") do(nodeId: NodeId) -> bool:
# TODO: Adjust `removeNode` to accept NodeId as param and to return bool.
let node = p.getNode(nodeId)
if node.isSome():
p.routingTable.removeNode(node.get())
return true
else:
return false
rpcServer.rpc("portal_" & network & "LookupEnr") do(nodeId: NodeId) -> Record:
let lookup = await p.resolve(nodeId)
if lookup.isSome():
return lookup.get().record
else:
raise newException(ValueError, "Record not found in DHT lookup.")
rpcServer.rpc("portal_" & network & "Ping") do(
enr: Record) -> tuple[enrSeq: uint64, dataRadius: UInt256]:
let
node = toNodeWithAddress(enr)
pong = await p.ping(node)
if pong.isErr():
raise newException(ValueError, $pong.error)
else:
let
p = pong.get()
# Note: the SSZ.decode cannot fail here as it has already been verified
# in the ping call.
decodedPayload =
try: SSZ.decode(p.customPayload.asSeq(), CustomPayload)
except MalformedSszError, SszSizeMismatchError:
raiseAssert("Already verified")
return (
p.enrSeq,
decodedPayload.dataRadius
)
rpcServer.rpc("portal_" & network & "FindNodes") do(
enr: Record, distances: seq[uint16]) -> seq[Record]:
let
node = toNodeWithAddress(enr)
nodes = await p.findNodes(node, distances)
if nodes.isErr():
raise newException(ValueError, $nodes.error)
else:
return nodes.get().map(proc(n: Node): Record = n.record)
rpcServer.rpc("portal_" & network & "FindContent") do(
enr: Record, contentKey: string) -> JsonNode:
let
node = toNodeWithAddress(enr)
foundContentResult = await p.findContent(
node, ByteList.init(hexToSeqByte(contentKey)))
if foundContentResult.isErr():
raise newException(ValueError, $foundContentResult.error)
else:
let foundContent = foundContentResult.get()
case foundContent.kind:
of Content:
return %ContentInfo(
content: foundContent.content.to0xHex(),
utpTransfer: foundContent.utpTransfer
)
of Nodes:
var rpcRes = newJObject()
rpcRes["enrs"] = %foundContent.nodes.map(proc(n: Node): Record = n.record)
return rpcRes
rpcServer.rpc("portal_" & network & "Offer") do(
enr: Record, contentKey: string, contentValue: string) -> string:
let
node = toNodeWithAddress(enr)
key = hexToSeqByte(contentKey)
content = hexToSeqByte(contentValue)
contentKV = ContentKV(contentKey: ByteList.init(key), content: content)
res = await p.offer(node, @[contentKV])
if res.isOk():
return SSZ.encode(res.get()).to0xHex()
else:
raise newException(ValueError, $res.error)
rpcServer.rpc("portal_" & network & "RecursiveFindNodes") do(
nodeId: NodeId) -> seq[Record]:
let discovered = await p.lookup(nodeId)
return discovered.map(proc(n: Node): Record = n.record)
rpcServer.rpc("portal_" & network & "RecursiveFindContent") do(
contentKey: string) -> ContentInfo:
let
key = ByteList.init(hexToSeqByte(contentKey))
contentId = p.toContentId(key).valueOr:
raise newException(ValueError, "Invalid content key")
contentResult = (await p.contentLookup(key, contentId)).valueOr:
return ContentInfo(content: "0x", utpTransfer: false)
return ContentInfo(
content: contentResult.content.to0xHex(),
utpTransfer: contentResult.utpTransfer
)
rpcServer.rpc("portal_" & network & "Store") do(
contentKey: string, contentValue: string) -> bool:
let key = ByteList.init(hexToSeqByte(contentKey))
let contentId = p.toContentId(key)
if contentId.isSome():
p.storeContent(key, contentId.get(), hexToSeqByte(contentValue))
return true
else:
raise newException(ValueError, "Invalid content key")
rpcServer.rpc("portal_" & network & "LocalContent") do(
contentKey: string) -> string:
let
key = ByteList.init(hexToSeqByte(contentKey))
contentId = p.toContentId(key).valueOr:
raise newException(ValueError, "Invalid content key")
contentResult = p.dbGet(key, contentId).valueOr:
return "0x"
return contentResult.to0xHex()
rpcServer.rpc("portal_" & network & "Gossip") do(
contentKey: string, contentValue: string) -> int:
let
key = hexToSeqByte(contentKey)
content = hexToSeqByte(contentValue)
contentKeys = ContentKeysList(@[ByteList.init(key)])
numberOfPeers = await p.neighborhoodGossip(Opt.none(NodeId), contentKeys, @[content])
return numberOfPeers
rpcServer.rpc("portal_" & network & "RandomGossip") do(
contentKey: string, contentValue: string) -> int:
let
key = hexToSeqByte(contentKey)
content = hexToSeqByte(contentValue)
contentKeys = ContentKeysList(@[ByteList.init(key)])
numberOfPeers = await p.randomGossip(Opt.none(NodeId), contentKeys, @[content])
return numberOfPeers