fix: assert in signing_shares - amount of members can match with amount of attempts

Co-Authored-By: UdjinM6 <UdjinM6@users.noreply.github.com>

Author: knst

src/llmq/signing_shares.cpp

@@ -807,9 +807,9 @@ void CSigSharesManager::TryRecoverSig(const CQuorumCPtr& quorum, const uint256&
     sigman.ProcessRecoveredSig(rs);
 }
 
-CDeterministicMNCPtr CSigSharesManager::SelectMemberForRecovery(const CQuorumCPtr& quorum, const uint256 &id, size_t attempt)
+CDeterministicMNCPtr CSigSharesManager::SelectMemberForRecovery(const CQuorumCPtr& quorum, const uint256 &id, int attempt)
 {
-    assert(size_t(attempt) < quorum->members.size());
+    assert(attempt < quorum->params.recoveryMembers);
 
     std::vector<std::pair<uint256, CDeterministicMNCPtr>> v;
     v.reserve(quorum->members.size());
@@ -819,7 +819,7 @@ CDeterministicMNCPtr CSigSharesManager::SelectMemberForRecovery(const CQuorumCPt
     }
     std::sort(v.begin(), v.end());
 
-    return v[attempt].second;
+    return v[attempt % v.size()].second;
 }
 
 void CSigSharesManager::CollectSigSharesToRequest(std::unordered_map<NodeId, std::unordered_map<uint256, CSigSharesInv, StaticSaltedHasher>>& sigSharesToRequest)

src/llmq/signing_shares.h

@@ -434,7 +434,7 @@ class CSigSharesManager : public CRecoveredSigsListener
 
     void HandleNewRecoveredSig(const CRecoveredSig& recoveredSig) override;
 
-    static CDeterministicMNCPtr SelectMemberForRecovery(const CQuorumCPtr& quorum, const uint256& id, size_t attempt);
+    static CDeterministicMNCPtr SelectMemberForRecovery(const CQuorumCPtr& quorum, const uint256& id, int attempt);
 
 private:
     // all of these return false when the currently processed message should be aborted (as each message actually contains multiple messages)

src/rpc/quorums.cpp

@@ -732,7 +732,7 @@ static RPCHelpMan quorum_selectquorum()
     ret.pushKV("quorumHash", quorum->qc->quorumHash.ToString());
 
     UniValue recoveryMembers(UniValue::VARR);
-    for (size_t i = 0; i < size_t(quorum->params.recoveryMembers); i++) {
+    for (int i = 0; i < quorum->params.recoveryMembers; ++i) {
         auto dmn = llmq_ctx.shareman->SelectMemberForRecovery(quorum, id, i);
         recoveryMembers.push_back(dmn->proTxHash.ToString());
     }