fix: Resolve TypeScript errors

Signed-off-by: Hermes Agent <hermes@nosuchhost>

client/node_modules/leveldown/chained-batch.js

@@ -0,0 +1,28 @@
+const util = require('util')
+const AbstractChainedBatch = require('abstract-leveldown').AbstractChainedBatch
+const binding = require('./binding')
+
+function ChainedBatch (db) {
+  AbstractChainedBatch.call(this, db)
+  this.context = binding.batch_init(db.context)
+}
+
+ChainedBatch.prototype._put = function (key, value) {
+  binding.batch_put(this.context, key, value)
+}
+
+ChainedBatch.prototype._del = function (key) {
+  binding.batch_del(this.context, key)
+}
+
+ChainedBatch.prototype._clear = function () {
+  binding.batch_clear(this.context)
+}
+
+ChainedBatch.prototype._write = function (options, callback) {
+  binding.batch_write(this.context, options, callback)
+}
+
+util.inherits(ChainedBatch, AbstractChainedBatch)
+
+module.exports = ChainedBatch