Unslab merkle-tree signatures (#542)

* Unslab merkle-tree signatures

* No getter/setter

lib/merkle-tree.js

@@ -259,7 +259,7 @@ class MerkleTreeBatch {
     this.tree.length = this.length
     this.tree.byteLength = this.byteLength
     this.tree.fork = this.fork
-    this.tree.signature = this.signature
+    this.tree.signature = this.signature !== null ? unslab(this.signature) : null
   }
 
   seek (bytes, padding) {
@@ -429,7 +429,7 @@ module.exports = class MerkleTree {
     this.roots = roots
     this.length = roots.length ? totalSpan(roots) / 2 : 0
     this.byteLength = totalSize(roots)
-    this.signature = signature
+    this.signature = signature !== null ? unslab(signature) : null
     this.prologue = prologue
 
     this.storage = storage

test/replicate.js

@@ -1599,6 +1599,21 @@ test('handshake is unslabbed', async function (t) {
   )
 })
 
+test('merkle-tree signature gets unslabbed', async function (t) {
+  const a = await create()
+  await a.append(['a'])
+
+  const b = await create(a.key)
+  replicate(a, b, t)
+  await b.get(0)
+
+  t.is(
+    b.core.tree.signature.buffer.byteLength,
+    64,
+    'Signature got unslabbed'
+  )
+})
+
 async function waitForRequestBlock (core) {
   while (true) {
     const reqBlock = core.replicator._inflight._requests.find(req => req && req.block)