# encodeUint64(asset\_id) doesn't work
**URL:** https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572
**Category:** General
**Created:** [December 21, 2022, 9:39am UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572 "2022-12-21T09:39:04Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@salman.haider](https://forum.algorand.co/u/salman.haider)
#### Post date: [December 21, 2022, 9:39am UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/1 "2022-12-21T09:39:04Z")
I’m trying to push the assetID to app.Args by encoding it to uint64 but its giving error
> console.log(algosdk.encodeUint64(12345))
It was working fine recently but now it giving issues.
```auto
uint64.ts:17 Uncaught TypeError: buf.writeBigUInt64BE is not a function
at Module.encodeUint64 (uint64.ts:17:1)
at App.tsx:16:1
at invokePassiveEffectCreate (react-dom.development.js:23487:1)
at HTMLUnknownElement.callCallback (react-dom.development.js:3945:1)
at Object.invokeGuardedCallbackDev (react-dom.development.js:3994:1)
at invokeGuardedCallback (react-dom.development.js:4056:1)
at flushPassiveEffectsImpl (react-dom.development.js:23574:1)
at unstable_runWithPriority (scheduler.development.js:468:1)
at runWithPriority$1 (react-dom.development.js:11276:1)
at flushPassiveEffects (react-dom.development.js:23447:1)
at react-dom.development.js:23324:1
at workLoop (scheduler.development.js:417:1)
at flushWork (scheduler.development.js:390:1)
at MessagePort.performWorkUntilDeadline (scheduler.development.js:157:1)
```
---
### Author:  [@scholtz](https://forum.algorand.co/u/scholtz)
#### Post date: [December 21, 2022, 9:47am UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/2 "2022-12-21T09:47:03Z")
i am using algosdk 1.24.1 without any issue…
`appArgs.push(algosdk.encodeUint64(123));` works for me well…
you probably installed some dependency which downgraded/changed buffer library?
---
### Author:  [@salman.haider](https://forum.algorand.co/u/salman.haider)
#### Post date: [December 21, 2022, 2:03pm UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/3 "2022-12-21T14:03:11Z")
I did use this version just 2 minutes ago and still got same error
---
### Author:  [@fabrice](https://forum.algorand.co/u/fabrice)
#### Post date: [December 21, 2022, 3:10pm UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/4 "2022-12-21T15:10:07Z")
Which version of node JS and algosdk are you using?
Are you using browserify or similar?
You may need to upgrade some of those.
---
### Author:  [@salman.haider](https://forum.algorand.co/u/salman.haider)
#### Post date: [December 21, 2022, 7:05pm UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/5 "2022-12-21T19:05:10Z")
node 14.17.0 and algosdk 1.24.1
---
### Author:  [@scholtz](https://forum.algorand.co/u/scholtz)
#### Post date: [December 21, 2022, 8:30pm UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/6 "2022-12-21T20:30:41Z")
i am using node v16.18.1 …
---
### Author:  [@fabrice](https://forum.algorand.co/u/fabrice)
#### Post date: [December 21, 2022, 10:28pm UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/7 "2022-12-21T22:28:00Z")
It looks like node v14.10 or after should work as this function was added in v14.10:
[https://nodejs.org/api/buffer.html#bufwritebiguint64bevalue-offset](https://nodejs.org/api/buffer.html#bufwritebiguint64bevalue-offset)
So my guess is that you’re using a framework/toolchain that is somewhat not providing this function.
It looks you are using react, but which toolchain are you using:
create react app, next.js, gatsby, vite
?
Which version?
Maybe posting package.json may help.
---
### Author:  [@AnishRane](https://forum.algorand.co/u/AnishRane)
#### Post date: [January 5, 2023, 9:29am UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/8 "2023-01-05T09:29:13Z")
@fabrice I am also facing same issue with algosdk 1.24.1 and node version 18.12.1, getting error on algosdk.encodeUint64() method
---
### Author:  [@scholtz](https://forum.algorand.co/u/scholtz)
#### Post date: [January 5, 2023, 10:03am UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/9 "2023-01-05T10:03:37Z")
i suggest to put this into your test cases
```auto
it("encodeUint64", function () {
expect(Buffer.from(algosdk.encodeUint64(123)).toString("hex")).toBe("000000000000007b");
expect(Buffer.from(algosdk.encodeUint64(123123123123123)).toString("hex")).toBe("00006ffad60473b3");
});
```
if it fails, there is issue with algosdk or some dependencies… if it goes through the issue is somewhere else
---
### Author:  [@fabrice](https://forum.algorand.co/u/fabrice)
#### Post date: [January 5, 2023, 2:07pm UTC](https://forum.algorand.co/t/encodeuint64-asset-id-doesnt-work/8572/10 "2023-01-05T14:07:31Z")
Can you show the exact error?
Are you using a framework such as create-react-app, next.js, gatsby, vite…?
Can you try to add the test suggested by @scholtz above?
Can you post your package.json (e.g., in Github gist)?
Can you create a fresh project with only algosdk and an `index.js` file that just test `encodeUint64` and nothing else?