feat: add single node quorum (#304)

Author: shumkov

lib/constants/index.js

@@ -92,6 +92,9 @@ module.exports = {
     // for devnet testing only
     // 12 members, 8 (67%) threshold, one per hour
     LLMQ_DEVNET_PLATFORM: 107,
+    // for testing only
+    // 1 member.
+    LLMQ_SINGLE_NODE: 111,
   },
 
   // when selecting a quorum for signing and verification, we use this offset as

lib/deterministicmnlist/QuorumEntry.js

@@ -407,6 +407,11 @@ QuorumEntry.getParams = function getParams(llmqType) {
       params.threshold = 8;
       params.maximumActiveQuorumsCount = 4;
       return params;
+    case constants.LLMQ_TYPES.LLMQ_SINGLE_NODE:
+      params.size = 1;
+      params.threshold = 1;
+      params.maximumActiveQuorumsCount = 2;
+      return params;
     default:
       throw new Error(`Invalid llmq type ${llmqType}`);
   }

lib/deterministicmnlist/SimplifiedMNList.js

@@ -398,6 +398,7 @@ SimplifiedMNList.prototype.getLLMQTypes = function getLLMQTypes() {
           constants.LLMQ_TYPES.LLMQ_TYPE_TEST_INSTANTSEND,
           constants.LLMQ_TYPES.LLMQ_TYPE_TEST_DIP0024,
           constants.LLMQ_TYPES.LLMQ_TEST_PLATFORM,
+          constants.LLMQ_TYPES.LLMQ_SINGLE_NODE,
         ];
         return llmqTypes;
       }