nwaku/waku/v2/node/jsonrpc/relay_api.nim

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import
json_rpc/rpcserver,
eth/[common, rlp, keys, p2p],
../../waku_types,
../wakunode2
proc installRelayApiHandlers*(node: WakuNode, rpcsrv: RpcServer) =
const futTimeout = 5.seconds
## Relay API version 1 definitions
rpcsrv.rpc("post_waku_v2_relay_v1_subscriptions") do(topics: seq[string]) -> bool:
## Subscribes a node to a list of PubSub topics
debug "post_waku_v2_relay_v1_subscriptions"
proc topicHandler(topic: string, data: seq[byte]) {.async, gcsafe.} =
let msg = WakuMessage.init(data)
if msg.isOk():
debug "WakuMessage received", msg=msg, topic=topic
# @TODO handle message
else:
debug "WakuMessage received but failed to decode", msg=msg, topic=topic
# @TODO handle message decode failure
var failedTopics: seq[string]
# Subscribe to all requested topics
for topic in topics:
# If any topic fails to subscribe, add to list of failedTopics
if not(await node.subscribe(topic, topicHandler).withTimeout(futTimeout)):
failedTopics.add(topic)
if (failedTopics.len() == 0):
# Successfully subscribed to all requested topics
return true
else:
# Failed to subscribe to one or more topics
raise newException(ValueError, "Failed to subscribe to topics " & repr(failedTopics))
rpcsrv.rpc("delete_waku_v2_relay_v1_subscriptions") do(topics: seq[string]) -> bool:
## Unsubscribes a node from a list of PubSub topics
debug "delete_waku_v2_relay_v1_subscriptions"
var failedTopics: seq[string]
# Unsubscribe all handlers from requested topics
for topic in topics:
# If any topic fails to unsubscribe, add to list of failedTopics
if not(await node.unsubscribeAll(topic).withTimeout(futTimeout)):
failedTopics.add(topic)
if (failedTopics.len() == 0):
# Successfully unsubscribed from all requested topics
return true
else:
# Failed to unsubscribe from one or more topics
raise newException(ValueError, "Failed to unsubscribe from topics " & repr(failedTopics))