[Indexing] - Support 10 blocks depth reorgs

backend/src/api/blocks.ts

@@ -23,6 +23,7 @@ class Blocks {
   private newBlockCallbacks: ((block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) => void)[] = [];
   private blockIndexingStarted = false;
   public blockIndexingCompleted = false;
+  public reindexFlag = true; // Always re-index the latest indexed data in case the node went offline with an invalid block tip (reorg)
 
   constructor() { }
 
@@ -189,16 +190,19 @@ class Blocks {
    * [INDEXING] Index all blocks metadata for the mining dashboard
    */
   public async $generateBlockDatabase() {
-    if (this.blockIndexingStarted) {
+    if (this.blockIndexingStarted && !this.reindexFlag) {
       return;
     }
 
+    this.reindexFlag = false;
+
     const blockchainInfo = await bitcoinClient.getBlockchainInfo();
     if (blockchainInfo.blocks !== blockchainInfo.headers) { // Wait for node to sync
       return;
     }
 
     this.blockIndexingStarted = true;
+    this.blockIndexingCompleted = false;
 
     try {
       let currentBlockHeight = blockchainInfo.blocks;
@@ -316,6 +320,12 @@ class Blocks {
 
       if (Common.indexingEnabled()) {
         await blocksRepository.$saveBlockInDatabase(blockExtended);
+
+        // If the last 10 blocks chain is not valid, re-index them (reorg)
+        const chainValid = await blocksRepository.$validateRecentBlocks();
+        if (!chainValid) {
+          this.reindexFlag = true;
+        }
       }
 
       if (block.height % 2016 === 0) {