Function attempt_access 

async fn attempt_access(
    client: &PasswordManagerClient,
    send_id: &str,
    access_key: &SendAccessKey,
    inputs: &ReceiveInputs,
) -> Result<String>

Negotiate a send-access token, prompting for whatever credential the server says the Send needs. Mirrors the legacy attemptAccess: ask with no credentials first and branch on the typed send_access_error_type the server returns.

Legacy wraps every token request in a 3-attempt retry loop (getTokenWithRetry) for a {kind: "expired"} case that only exists because browser/extension storage caches tokens between calls. bw receive is a single-shot process with no token cache — the token is minted and consumed inside this one invocation — so there is nothing to expire and no retry here.