nimbus-eth2/beacon_chain/request_manager.nim

37 lines
1.2 KiB
Nim

import
options, random,
chronos, chronicles,
spec/datatypes,
eth2_network, beacon_node_types, sync_protocol,
eth/async_utils
proc init*(T: type RequestManager, network: Eth2Node): T =
T(network: network)
type
FetchAncestorsResponseHandler = proc (b: BeaconBlock) {.gcsafe.}
proc fetchAncestorBlocksFromPeer(peer: Peer, rec: FetchRecord, responseHandler: FetchAncestorsResponseHandler) {.async.} =
let blocks = await peer.getBeaconBlocks(rec.root, GENESIS_SLOT, rec.historySlots.int, 0, 1)
if blocks.isSome:
for b in blocks.get:
responseHandler(b)
proc fetchAncestorBlocks*(requestManager: RequestManager,
roots: seq[FetchRecord],
responseHandler: FetchAncestorsResponseHandler) =
# TODO: we could have some fancier logic here:
#
# * Keeps track of what was requested
# (this would give a little bit of time for the asked peer to respond)
#
# * Keep track of the average latency of each peer
# (we can give priority to peers with better latency)
#
const ParallelRequests = 2
var fetchComplete = false
for peer in requestManager.network.randomPeers(ParallelRequests, BeaconSync):
traceAsyncErrors peer.fetchAncestorBlocksFromPeer(roots.rand(), responseHandler)