Add typedoc for CheckpointTrie._formatNode

src/baseTrie.ts

@@ -668,7 +668,7 @@ export class Trie {
    * @param {TrieNode} node - the node to format
    * @param {Boolean} topLevel - if the node is at the top level
    * @param {BatchDBOp[]} opStack - the opStack to push the node's data
-   * @param {Boolean} remove - whether to remove the node (pushes `del` operation to the opStack)
+   * @param {Boolean} remove - whether to remove the node (only used for CheckpointTrie)
    * @returns {Buffer | (EmbeddedNode | null)[]} - the node's hash used as the key or the rawNode
    */
   _formatNode(

src/checkpointTrie.ts

@@ -1,7 +1,8 @@
 import { Trie as BaseTrie } from './baseTrie'
 import { ScratchReadStream } from './scratchReadStream'
 import { ScratchDB } from './scratch'
-import { DB } from './db'
+import { DB, BatchDBOp } from './db'
+import { TrieNode } from './trieNode'
 const WriteStream = require('level-ws')
 
 export class CheckpointTrie extends BaseTrie {
@@ -142,4 +143,40 @@ export class CheckpointTrie extends BaseTrie {
     trie.db = scratch
     return new ScratchReadStream(trie)
   }
+
+  /**
+   * Formats node to be saved by levelup.batch.
+   * @method _formatNode
+   * @private
+   * @param {TrieNode} node - the node to format
+   * @param {Boolean} topLevel - if the node is at the top level
+   * @param {BatchDBOp[]} opStack - the opStack to push the node's data
+   * @param {Boolean} remove - whether to remove the node (only used for CheckpointTrie)
+   * @returns {Buffer | (EmbeddedNode | null)[]} - the node's hash used as the key or the rawNode
+   */
+  _formatNode(node: TrieNode, topLevel: boolean, opStack: BatchDBOp[], remove: boolean = false) {
+    console.log('ENTERING HERE')
+    const rlpNode = node.serialize()
+
+    if (rlpNode.length >= 32 || topLevel) {
+      const hashRoot = node.hash()
+
+      if (remove && this.isCheckpoint) {
+        opStack.push({
+          type: 'del',
+          key: hashRoot,
+        })
+      } else {
+        opStack.push({
+          type: 'put',
+          key: hashRoot,
+          value: rlpNode,
+        })
+      }
+
+      return hashRoot
+    }
+
+    return node.raw()
+  }
 }