From 236e584055912abaab6226fbc6c9fb28046799a5 Mon Sep 17 00:00:00 2001
From: Christophe Diederichs <45171645+chm-diederichs@users.noreply.github.com>
Date: Thu, 5 Dec 2024 12:29:49 +0100
Subject: [PATCH] rocksdb: minor tweaks (#613)

* drafts are writable

* session overwrite should emit events
---
 index.js             | 1 +
 lib/session-state.js | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 1d19ec70..da168f01 100644
--- a/index.js
+++ b/index.js
@@ -395,6 +395,7 @@ class Hypercore extends EventEmitter {
   }
 
   _isWritable () {
+    if (this.draft) return true
     return !this._readonly && !!(this.keyPair && this.keyPair.secretKey)
   }
 
diff --git a/lib/session-state.js b/lib/session-state.js
index b4adab87..da92dbc3 100644
--- a/lib/session-state.js
+++ b/lib/session-state.js
@@ -511,7 +511,14 @@ module.exports = class SessionState {
     await this.mutex.lock()
 
     try {
-      await this._overwrite(state, length, treeLength, null)
+      const origLength = this.tree.length
+
+      const tree = await this._overwrite(state, length, treeLength, null)
+
+      const bitfield = { start: treeLength, length: tree.length - treeLength, drop: false }
+
+      if (treeLength < origLength) this.ontruncate(tree, treeLength, origLength)
+      if (treeLength < tree.length) this.onappend(tree, bitfield)
 
       return {
         length: this.tree.length,