129 lines
4.5 KiB
Nim
129 lines
4.5 KiB
Nim
# Nimbus
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# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [Defect].}
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import
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std/sequtils,
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json_rpc/[rpcproxy, rpcserver], stew/byteutils,
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eth/p2p/discoveryv5/protocol as discv5_protocol,
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./rpc_types
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export rpc_types # tasty sandwich
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type
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PongResponse* = object
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enrSeq: uint64
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recipientIP: string
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recipientPort: uint16
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proc installDiscoveryApiHandlers*(rpcServer: RpcServer|RpcProxy,
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d: discv5_protocol.Protocol) {.raises: [Defect, CatchableError].} =
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## Discovery v5 JSON-RPC API such as defined here:
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## https://ddht.readthedocs.io/en/latest/jsonrpc.html
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## and here:
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## https://github.com/ethereum/portal-network-specs/pull/88
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## Note: There are quite some discrepancies between the two, can only
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## implement exactly once specification has settled.
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rpcServer.rpc("discv5_routingTableInfo") do() -> RoutingTableInfo:
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return getRoutingTableInfo(d.routingTable)
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rpcServer.rpc("discv5_nodeInfo") do() -> NodeInfo:
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return d.routingTable.getNodeInfo()
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rpcServer.rpc("discv5_updateNodeInfo") do(
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kvPairs: seq[(string, string)]) -> NodeInfo:
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let enrFields = kvPairs.map(
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proc(n: (string, string)): (string, seq[byte]) =
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(n[0], hexToSeqByte(n[1]))
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)
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let updated = d.updateRecord(enrFields)
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if updated.isErr():
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raise newException(ValueError, $updated.error)
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return d.routingTable.getNodeInfo()
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rpcServer.rpc("discv5_addEnrs") do(enrs: seq[Record]) -> bool:
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# TODO: We could also adjust the API of addNode & newNode to accept a seen
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# parameter, but perhaps only if that makes sense on other locations in
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# discv5/portal that are not testing/debug related.
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for enr in enrs:
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let nodeRes = newNode(enr)
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if nodeRes.isOk():
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let node = nodeRes.get()
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discard d.addNode(node)
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d.routingTable.setJustSeen(node)
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return true
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rpcServer.rpc("discv5_getEnr") do(nodeId: NodeId) -> Record:
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let node = d.getNode(nodeId)
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if node.isSome():
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return node.get().record
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else:
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raise newException(ValueError, "Record not in local routing table.")
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rpcServer.rpc("discv5_deleteEnr") do(nodeId: NodeId) -> bool:
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# TODO: Adjust `removeNode` to accept NodeId as param and to return bool.
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let node = d.getNode(nodeId)
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if node.isSome():
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d.routingTable.removeNode(node.get())
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return true
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else:
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raise newException(ValueError, "Record not in local routing table.")
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rpcServer.rpc("discv5_lookupEnr") do(nodeId: NodeId) -> Record:
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# TODO: Not using seqNum, what is the use case of this?
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let lookup = await d.resolve(nodeId)
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if lookup.isSome():
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return lookup.get().record
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else:
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raise newException(ValueError, "Record not found in DHT lookup.")
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rpcServer.rpc("discv5_ping") do(enr: Record) -> PongResponse:
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let
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node = toNodeWithAddress(enr)
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pong = await d.ping(node)
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if pong.isErr():
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raise newException(ValueError, $pong.error)
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else:
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let p = pong.get()
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return PongResponse(
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enrSeq: p.enrSeq,
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recipientIP: $p.ip,
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recipientPort: p.port
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)
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rpcServer.rpc("discv5_findNode") do(
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enr: Record, distances: seq[uint16]) -> seq[Record]:
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let
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node = toNodeWithAddress(enr)
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nodes = await d.findNode(node, distances)
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if nodes.isErr():
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raise newException(ValueError, $nodes.error)
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else:
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return nodes.get().map(proc(n: Node): Record = n.record)
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rpcServer.rpc("discv5_talkReq") do(enr: Record, protocol, payload: string) -> string:
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let
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node = toNodeWithAddress(enr)
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talkresp = await d.talkReq(
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node, hexToSeqByte(protocol), hexToSeqByte(payload))
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if talkresp.isErr():
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raise newException(ValueError, $talkresp.error)
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else:
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return talkresp.get().toHex()
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rpcServer.rpc("discv5_recursiveFindNodes") do() -> seq[Record]:
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# TODO: Not according to the specification currently as the node_id is a
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# parameter to be passed, but in that case it would be very similar to
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# discv5_lookupEnr.
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let discovered = await d.lookup(NodeId.random(d.rng[]))
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return discovered.map(proc(n: Node): Record = n.record)
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