How to use levelup.batch:
GitHub: 0xArcturus/Dexes
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var newNode = new TrieNode('leaf', key, value) this.root = newNode.hash() this._putNode(newNode, cb) } // formats node to be saved by levelup.batch. // returns either the hash that will be used key or the rawNode Trie.prototype._formatNode = function (node, topLevel, remove, opStack) { if (arguments.length === 3) { opStack = remove