Parameter Missing or Invalid: Required parameter missing or invalid: channel

[AlexTzone]

We use this version of the code: https://sdks.shopifycdn.com/buy-button/3.0.5/buybutton.js

Just last night, out of nowhere, without any of us changing any of the code, we get this error when customers try to open the checkout window: "Parameter Missing or Invalid: Required parameter missing or invalid: channel".

I edited this line inside the buybutton.js like following:

var webUrl = cart.checkoutUrl;
webUrl = webUrl.replace(/&channel=buy_button/, '');

This line in the url "&channel=buy_button" was caused the issue, now at least the checkout window opens, but it feels sketchy at best. Please advise.

[kdaviduik]

Hi @AlexTzone, thanks for reporting this! The parameter channel=buy_button is expected, though that error is unexpected if you haven't made any code changes.

I'm not able to reproduce this issue on my end. Please let me know if you continue to see this issue (ie: if you disable the workaround in a dev environment).

The parameter channel=buy_button is only required for certain shops (to continue to support a legacy feature of Buy Button JS v2 and below); if checkout is working for you without this parameter, it is fine to remove it like you did.

[kdaviduik]

We have confirmed the issue is ongoing. In the meantime, if anyone else runs into this, you can add this to your code as a workaround:

var webUrl = cart.checkoutUrl;
webUrl = webUrl.replace("channel=buy_button", "channel=online_store");

[AlexTzone]

Thank you for the clarification and the suggested fix :)

[kdaviduik]

Update for anyone else: we have identified and fixed the root cause. The issue has been resolved.