Function: pkceChallenge()

function pkceChallenge(): Promise<PkceChallenge>

Generate a PKCE code verifier + S256 challenge (RFC 7636). Pass codeChallenge to buildAuthorizeUrl and keep codeVerifier to later exchange the returned code via authorizationCodeGrant. Uses the Web Crypto API (Node 18+ / browsers).

Returns

Promise<PkceChallenge>