signQuery results in error: Cannot set properties of undefined (setting 'X-Amz-Security-Token')

[frtelg]

I am using the aws4-axios interceptor to be able to call cache invalidation in API Gateway from a lambda. I have the following configuration:

    const interceptor = aws4Interceptor({
        options: {
            signQuery: true, // Use query string signing to avoid clash with the Authorization header
            region: process.env.AWS_REGION,
            service: 'execute-api',
        },
    });

As stated in the comment in the code snippet, I need to use signedQuery in order to be able to make the signed call, because the API Gateway call has a required Authorization header. When I do this however, I get the following error:
Cannot set properties of undefined (setting 'X-Amz-Security-Token').

Did I miss anything in my config or is this a bug maybe?

[frtelg]

I'm expecting this to be a bug, as I'm able to work around this with the following:

        await this.axios.get(url, {
            ...config,
            headers: {
                'Cache-Control': 'max-age=0',
                ...config?.headers,
            },
            params: {
                ...config?.params,
                'X-Amz-Date': '',
                'X-Amz-Algorithm': '',
                'X-Amz-Credential': '',
                'X-Amz-SignedHeaders': '',
                'X-Amz-Signature': '',
            },
        });

Edit: better workaround:
Setting a default params property in your axios config:

axios.create({
        params: {
            // Params MUST be present for the interceptor to work
        },
    })

[frtelg]

It can be fixed by changing this:

      for (const [key, value] of signedUrl.searchParams.entries()) {
        config.params[key] = value;
      }

To this:

    config.params = {
        ...config.params,
        ...Object.fromEntries(signedUrl.searchParams.entries())
     }