Ability to disable x-sdk-version header to avoid CORS errors with Infura

[starker-xp]

Hi Thirdweb team,

I'm currently using your SDK in a frontend application hosted at https://mywebsite, and I'm running into a CORS issue when making requests to Infura's Base Mainnet endpoint:

Access to fetch at 'https://base-mainnet.infura.io/v3/' from origin 'https://mywebsite' has been blocked by CORS policy:
Request header field x-sdk-version is not allowed by Access-Control-Allow-Headers in preflight response.

After investigating, it seems the SDK is adding the x-sdk-version header by default, which causes the browser to send a CORS preflight request. Unfortunately, Infura does not allow this header, so the request is blocked.

It would be really helpful to have a way to disable or customize the x-sdk-version header in the SDK, especially for frontend-only applications interacting with strict third-party APIs like Infura.

Thanks for your great work, and looking forward to a solution or workaround!

Best,

[linear]

TOOL-4814 Ability to disable x-sdk-version header to avoid CORS errors with Infura

[0xFirekeeper]

Hey @starker-xp you should be able to access the http client via ThirdwebManager.Instance.Client.HttpClient then call its ClearHeaders function. The DX is not great even then so I'll make note of this and ship it as an enhancement in a future version.