From de1347520884ff0b3f3b69b7bc1d9201fc691d25 Mon Sep 17 00:00:00 2001
From: Ivan Folgueira Bande <ivansete@status.im>
Date: Fri, 28 Nov 2025 16:21:12 +0100
Subject: [PATCH] chore: add constants.nim

---
 waku/waku_rln_relay/constants.nim | 59 +++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 waku/waku_rln_relay/constants.nim

diff --git a/waku/waku_rln_relay/constants.nim b/waku/waku_rln_relay/constants.nim
new file mode 100644
index 000000000..f927cbb7d
--- /dev/null
+++ b/waku/waku_rln_relay/constants.nim
@@ -0,0 +1,59 @@
+import stint
+
+import ./protocol_types
+
+import ../waku_keystore
+
+# Acceptable roots for merkle root validation of incoming messages
+const AcceptableRootWindowSize* = 50
+
+# RLN membership key and index files path
+const RlnCredentialsFilename* = "rlnCredentials.txt"
+
+# inputs of the membership contract constructor
+# TODO may be able to make these constants private and put them inside the waku_rln_relay_utils
+const
+  # in wei
+  MembershipFee* = 0.u256
+  #  the current implementation of the rln lib supports a circuit for Merkle tree with depth 20
+  MerkleTreeDepth* = 20
+  EthClient* = "http://127.0.0.1:8540"
+
+const
+  # the size of poseidon hash output in bits
+  HashBitSize* = 256
+  # the size of poseidon hash output as the number hex digits
+  HashHexSize* = int(HashBitSize / 4)
+
+const DefaultRlnTreePath* = "rln_tree.db"
+
+const
+  # pre-processed "rln/waku-rln-relay/v2.0.0" to array[32, byte]
+  DefaultRlnIdentifier*: RlnIdentifier = [
+    114, 108, 110, 47, 119, 97, 107, 117, 45, 114, 108, 110, 45, 114, 101, 108, 97, 121,
+    47, 118, 50, 46, 48, 46, 48, 0, 0, 0, 0, 0, 0, 0,
+  ]
+  DefaultUserMessageLimit* = UserMessageLimit(20)
+
+# temporary variables to test waku-rln-relay performance in the static group mode
+const
+  StaticGroupSize* = 10000
+  #  StaticGroupKeys is a static list of 10000 membership keys in the form of (identity trapdoor, identity nullifier, identity secret hash, identity commitment)
+  #  keys are created locally, using createMembershipList proc from waku_rln_relay_utils module, and the results are hardcoded in here
+  #  this list is temporary and is created to test the performance of waku-rln-relay for the static groups
+  #  in the later versions, this static hardcoded group will be replaced with a dynamic one
+
+const StaticGroupKeys* = @[]
+
+# StaticGroupMerkleRoot is the root of the Merkle tree constructed from the StaticGroupKeys above
+# rln-v2: rate commitments are used for the Merkle tree construction, defaulting the UserMessageLimit to 20
+# the root is created locally, using createMembershipList proc from waku_rln_relay_utils module, and the result is hardcoded in here
+const StaticGroupMerkleRoot* =
+  "2c149e48886b5ba3da2edf8db8d7a364ae7a25618489c04cf0c0380f7cdd4d6f"
+
+const MaxClockGapSeconds* = 20.0 # the maximum clock difference between peers in seconds
+
+# RLN Keystore defaults
+const RLNAppInfo* = AppInfo(
+  application: "waku-rln-relay", appIdentifier: "01234567890abcdef", version: "0.2"
+)