Etsy API doesn't return parameter.codeVerifier_ ?

[MOhhh-ok]

Hi.

Etsy seems to be not return codeVerifire_ parameter.

The error is "Error retrieving token: invalid_request, code_verifier is required"

So, I tried below code, then it works.

    function EtsyAuthCallback(request: { [key: string]: any }) {
        const oauth = new EtsyOAuth(); // Wrapper class
        const service = oauth.getService();
 
        // ignore the error: Error retrieving token: invalid_request, code_verifier is required
        request.parameter.codeVerifier_ = PropertiesService.getUserProperties().getProperty('code_verifier');

        const isAuthorized = service.handleCallback(request);
        if (isAuthorized) {
            return HtmlService.createHtmlOutput('Success! You can close this tab.');
        } else {
            return HtmlService.createHtmlOutput('Denied. You can close this tab');
        }
    }

Is this an issue, or my mistake?
Thanks.

[erickoledadevrel]

Are you writing the code verifier as shown in this other sample?

apps-script-oauth2/samples/Twitter.gs

Lines 98 to 117 in 9499dba

	function pkceChallengeVerifier() {
	var userProps = PropertiesService.getUserProperties();
	if (!userProps.getProperty('code_verifier')) {
	var verifier = '';
	var possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~';
	for (var i = 0; i < 128; i++) {
	verifier += possible.charAt(Math.floor(Math.random() * possible.length));
	}
	var sha256Hash = Utilities.computeDigest(Utilities.DigestAlgorithm.SHA_256, verifier);
	var challenge = Utilities.base64Encode(sha256Hash)
	.replace(/\+/g, '-')
	.replace(/\//g, '_')
	.replace(/=+$/, '');
	userProps.setProperty('code_verifier', verifier);
	userProps.setProperty('code_challenge', challenge);
	}
	}

[MOhhh-ok]

Yeah, I am writing that code.
So I can find the correct code_verifier from the user properties.
The problem is that the code_verifier is not in the request object parameter in the callback function.