1 files changed, 14 insertions, 12 deletions
diff --git a/js/truncate.ts b/js/truncate.ts
index 259c57da5..c6e5b3ad0 100644
--- a/js/truncate.ts
+++ b/js/truncate.ts
@@ -1,15 +1,17 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-import { sendSync, sendAsync, msg, flatbuffers } from "./dispatch_flatbuffers";
+import { sendSync, sendAsync } from "./dispatch_json";
+import * as dispatch from "./dispatch";
 
-function req(
-  name: string,
-  len?: number
-): [flatbuffers.Builder, msg.Any, flatbuffers.Offset] {
-  const builder = flatbuffers.createBuilder();
-  const name_ = builder.createString(name);
-  len = len && len > 0 ? Math.floor(len) : 0;
-  const inner = msg.Truncate.createTruncate(builder, name_, len);
-  return [builder, msg.Any.Truncate, inner];
+function coerceLen(len?: number): number {
+  if (!len) {
+    return 0;
+  }
+
+  if (len < 0) {
+    return 0;
+  }
+
+  return len;
 }
 
 /** Truncates or extends the specified file synchronously, updating the size of
@@ -18,7 +20,7 @@ function req(
  *       Deno.truncateSync("hello.txt", 10);
  */
 export function truncateSync(name: string, len?: number): void {
-  sendSync(...req(name, len));
+  sendSync(dispatch.OP_TRUNCATE, { name, len: coerceLen(len) });
 }
 
 /**
@@ -28,5 +30,5 @@ export function truncateSync(name: string, len?: number): void {
  *       await Deno.truncate("hello.txt", 10);
  */
 export async function truncate(name: string, len?: number): Promise<void> {
-  await sendAsync(...req(name, len));
+  await sendAsync(dispatch.OP_TRUNCATE, { name, len: coerceLen(len) });
 }