return block if no encryption is present

Author: chm-diederichs

lib/batch.js

@@ -193,6 +193,7 @@ module.exports = class HypercoreBatch extends EventEmitter {
     const length = this._sessionLength
     if (index < length) {
       const block = await this.session.get(index, { ...opts, tree: this._sessionBatch })
+      if (!this.session.encryption) return block
       return this._encrypt(index, block)
     }