nim-dagger/codex/storageproofs/stpnetwork.nim

107 lines
2.4 KiB
Nim

## Nim-Dagger
## Copyright (c) 2022 Status Research & Development GmbH
## Licensed under either of
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
## at your option.
## This file may not be copied, modified, or distributed except according to
## those terms.
import std/sequtils
import pkg/chronos
import pkg/libp2p
import pkg/chronicles
import pkg/questionable/results
import pkg/contractabi/address as ca
import ./stpproto
import ../discovery
import ../formats
const
Codec* = "/dagger/storageproofs/1.0.0"
MaxMessageSize* = 1 shl 22 # 4MB
logScope:
topics = "dagger storageproofs network"
type
TagsHandler* = proc(msg: TagsMessage):
Future[void] {.raises: [Defect], gcsafe.}
StpNetwork* = ref object of LPProtocol
switch*: Switch
discovery*: Discovery
tagsHandle*: TagsHandler
proc uploadTags*(
self: StpNetwork,
cid: Cid,
indexes: seq[int],
tags: seq[seq[byte]],
host: ca.Address
): Future[?!void] {.async.} =
# Upload tags to `host`
#
var msg = TagsMessage(cid: cid.data.buffer)
for i in indexes:
msg.tags.add(Tag(idx: i, tag: tags[i]))
let
peers = await self.discovery.find(host)
connFut = await one(peers.mapIt(
self.switch.dial(
it.data.peerId,
it.data.addresses.mapIt( it.address ),
@[Codec])))
conn = await connFut
try:
await conn.writeLp(msg.encode)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "Exception submitting tags", cid, exc = exc.msg
return failure(exc.msg)
finally:
await conn.close()
return success()
method init*(self: StpNetwork) =
## Perform protocol initialization
##
proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
try:
let
msg = await conn.readLp(MaxMessageSize)
res = TagsMessage.decode(msg)
if not self.tagsHandle.isNil:
if res.isOk and res.get.tags.len > 0:
await self.tagsHandle(res.get)
except CatchableError as exc:
trace "Exception handling Storage Proofs message", exc = exc.msg
finally:
await conn.close()
self.handler = handle
self.codec = Codec
proc new*(
T: type StpNetwork,
switch: Switch,
discovery: Discovery
): StpNetwork =
## create a new StpNetwork instance
let
self = StpNetwork(
switch: switch,
discovery: discovery)
self.init()
self