Deployment monitoring and recovery tooling

server/testnet/ledger.ts

@@ -41,6 +41,7 @@ export class Ledger {
   private readonly pow: PowEngine;
   private closed = false;
   private revision = 0;
+  private reorgs = 0;
   private canonicalCache: { tip: string; blocks: TestnetBlock[] } | undefined;
   private constructor(file: string, db: DatabaseSync, pow: PowEngine) { this.file = file; this.db = db; this.pow = pow; }
 
@@ -148,6 +149,9 @@ export class Ledger {
   }
 
   get size(): number { return this.nodes.size; }
+  diagnostics() { const createdAt=this.nodes.get(this.tip)?.block.createdAt??null;
+    return { height:this.height(), dagBlocks:this.size, pending:this.pending.length, mutationQueue:this.queued,
+      reorgsSinceStartup:this.reorgs,tipCreatedAt:createdAt,tipAgeSeconds:createdAt===null?null:Math.max(0,Date.now()/1000-createdAt) }; }
   get allBlocks(): TestnetBlock[] {
     const rows = this.db.prepare('SELECT block_json FROM blocks ORDER BY sequence').all() as { block_json: string }[];
     return rows.map(row => blockSchema.parse(JSON.parse(row.block_json)));
@@ -191,6 +195,7 @@ export class Ledger {
       await this.persist(node.block, pending);
       this.nodes.set(node.block.hash, node);
       if (wins) this.tip = node.block.hash;
+      if (disconnected.length) this.reorgs++;
       this.pending = pending;
       if (filtered) this.pendingState = filtered.state;
       this.revision++;