Fixes from Ivan's review

* Change generateRlnProof error handling
* Fix imports
* Remove result use

apps/chat2/chat2.nim

@@ -48,7 +48,7 @@ import
   ./config_chat2
 
 import libp2p/protocols/pubsub/rpc/messages, libp2p/protocols/pubsub/pubsub
-import ../../logos_delivery/waku/rln
+import logos_delivery/waku/rln
 
 const Help = """
   Commands: /[?|help|connect|nick|exit]
@@ -193,12 +193,7 @@ proc publish(c: Chat, line: string) =
     # for future version when we support more than one rln protected content topic,
     # we should check the message content topic as well
     let proofRes =
-      try:
-        waitFor c.node.rln.generateRLNProof(message.toRLNSignal(), float64(time))
-      except CatchableError:
-        Result[seq[byte], string].err(
-          "exception generating rln proof: " & getCurrentExceptionMsg()
-        )
+      waitFor c.node.rln.generateRLNProof(message.toRLNSignal(), float64(time))
     if proofRes.isErr():
       info "could not append rate limit proof to the message"
     else:

library/liblogosdelivery.nim

@@ -1,4 +1,5 @@
-import std/[atomics, macros], chronicles, chronos, chronos/threadsync, ffi
+import std/[atomics, macros]
+import chronicles, chronos, chronos/threadsync, ffi
 import
   logos_delivery/waku/waku_core/message/message,
   logos_delivery/waku/waku_core/topics/pubsub_topic,

logos_delivery/waku/incentivization/eligibility_manager.nim

@@ -1,13 +1,8 @@
-import
-  std/sets,
-  chronos,
-  web3,
-  stew/byteutils,
-  stint,
-  results,
-  chronicles,
-  logos_delivery/waku/incentivization/rpc,
-  tests/waku_rln_relay/utils_onchain
+import std/sets, chronos, web3, stew/byteutils, stint, results
+
+import chronicles
+
+import logos_delivery/waku/incentivization/rpc, tests/waku_rln_relay/utils_onchain
 
 const SimpleTransferGasUsed = Quantity(21000)
 const TxReceiptQueryTimeout = 3.seconds

logos_delivery/waku/node/subscription_manager.nim

@@ -1,10 +1,6 @@
-import
-  std/[sequtils, sets, tables],
-  chronos,
-  chronicles,
-  metrics,
-  results,
-  libp2p/[peerid, peerinfo]
+import std/[sequtils, sets, tables], chronos, chronicles, metrics, results
+
+import libp2p/[peerid, peerinfo]
 import brokers/broker_context
 
 import

logos_delivery/waku/persistency/backend_comm.nim

@@ -81,9 +81,10 @@ proc mtMarshalSizeValue*[T](value: Opt[T]): int {.gcsafe.} =
   # Opt[T] is generic: for a copyMem-able T the generic size pass takes the
   # sizeof() branch (padding included) while our marshal writes flag+payload.
   mixin mtMarshalSizeValue
-  result = sizeof(uint8)
+  var size = sizeof(uint8)
   if value.isSome():
-    result += mtMarshalSizeValue(value.get())
+    size += mtMarshalSizeValue(value.get())
+  return size
 
 proc mtMarshalValue*(
     buf: ptr UncheckedArray[byte], cap: int, value: TxOp, pos: var int

logos_delivery/waku/rest_api/endpoint/origin_handler.nim

@@ -1,7 +1,7 @@
 {.push raises: [].}
 
-import
-  std/[strutils, net], regex, results, chronicles, chronos, chronos/apps/http/httpserver
+import std/[strutils, net], regex, results
+import chronicles, chronos, chronos/apps/http/httpserver
 
 type OriginHandlerMiddlewareRef* = ref object of HttpServerMiddlewareRef
   allowedOriginMatcher: Opt[Regex2]

logos_delivery/waku/rest_api/endpoint/store/handlers.nim

@@ -1,24 +1,21 @@
 {.push raises: [].}
 
+import std/options, std/[strformat, sugar], results
+
+import chronicles, uri, json_serialization, presto/route
 import
-  std/options,
-  std/[strformat, sugar],
-  results,
-  chronicles,
-  uri,
-  json_serialization,
-  presto/route
-import
-  ../../../waku_core,
-  ../../../waku_store/common,
-  ../../../waku_store/self_req_handler,
-  ../../../waku_node,
-  ../../../node/peer_manager,
-  ../../../common/paging,
-  ../../handlers,
-  ../responses,
-  ../serdes,
-  ./types
+  logos_delivery/waku/[
+    waku_core,
+    waku_store/common,
+    waku_store/self_req_handler,
+    waku_node,
+    node/peer_manager,
+    common/paging,
+    rest_api/handlers,
+    rest_api/endpoint/responses,
+    rest_api/endpoint/serdes,
+    rest_api/endpoint/store/types,
+  ]
 
 export types
 

logos_delivery/waku/rln/proof.nim

@@ -3,9 +3,15 @@
 import std/[times, sequtils]
 import chronos, chronicles, results, stew/byteutils
 
-import ./types, ./protocol_types, ./conversion_utils, ./group_manager, ./nonce_manager
-
-import logos_delivery/waku/waku_core
+import
+  logos_delivery/waku/[
+    rln/types,
+    rln/protocol_types,
+    rln/conversion_utils,
+    rln/group_manager,
+    rln/nonce_manager,
+    waku_core,
+  ]
 
 proc calcEpoch*(rln: Rln, t: float64): Epoch =
   ## gets time `t` as `flaot64` with subseconds resolution in the fractional part
@@ -56,13 +62,16 @@ proc toRLNSignal*(wakumessage: WakuMessage): seq[byte] =
 
 proc generateRLNProof*(
     rln: Rln, input: seq[byte], senderEpochTime: float64
-): Future[Result[seq[byte], string]] {.async.} =
+): Future[Result[seq[byte], string]] {.async: (raises: []).} =
   let epoch = rln.calcEpoch(senderEpochTime)
   let nonce = rln.nonceManager.getNonce().valueOr:
     return err("could not get new message id to generate an rln proof: " & $error)
-  let proof = (await rln.groupManager.generateProof(input, epoch, nonce)).valueOr:
-    return err("could not generate rln-v2 proof: " & $error)
-  return ok(proof.encode().buffer)
+  try:
+    let proof = (await rln.groupManager.generateProof(input, epoch, nonce)).valueOr:
+      return err("could not generate rln-v2 proof: " & $error)
+    return ok(proof.encode().buffer)
+  except CatchableError as e:
+    return err("exception generating rln proof: " & e.msg)
 
 proc generateRLNProofWithRootRefresh*(
     rln: Rln, input: seq[byte], senderEpochTime: float64

logos_delivery/waku/rln/rln/wrappers.nim

@@ -1,14 +1,16 @@
+import stew/[arrayops, endians2], stint, results
+
+import chronicles, eth/keys
+
 import
-  chronicles,
-  eth/keys,
-  stew/[arrayops, endians2],
-  stint,
-  results,
-  ./rln_interface,
-  ../conversion_utils,
-  ../protocol_types,
-  ../protocol_metrics
-import ../../waku_core, ../../waku_keystore
+  logos_delivery/waku/[
+    rln/rln/rln_interface,
+    rln/conversion_utils,
+    rln/protocol_types,
+    rln/protocol_metrics,
+    waku_core,
+    waku_keystore,
+  ]
 
 {.push raises: [], gcsafe.}
 

logos_delivery/waku/waku_peer_exchange/client.nim

@@ -1,14 +1,14 @@
+import results
+import chronicles, chronos, metrics
 import
-  results,
-  chronicles,
-  chronos,
-  metrics,
-  ./common,
-  ./rpc,
-  ./rpc_codec,
-  ../node/peer_manager
+  logos_delivery/waku/[
+    waku_peer_exchange/common,
+    waku_peer_exchange/rpc,
+    waku_peer_exchange/rpc_codec,
+    node/peer_manager,
+  ]
 
-from ../waku_core/codecs import WakuPeerExchangeCodec
+from logos_delivery/waku/waku_core/codecs import WakuPeerExchangeCodec
 
 declarePublicGauge waku_px_peers_received_total,
   "number of ENRs received via peer exchange"