updated readme + example

README.md

@@ -2,7 +2,8 @@
 
 A pure-Rust reimplementation of the [Proton Drive SDK](https://github.com/ProtonDriveApps/sdk).
 No dependency on the official NativeAOT core — it talks to the Proton Drive API
-and does the OpenPGP crypto directly.
+and does the OpenPGP crypto directly. The canonical reference is the upstream
+**C#** implementation; behavior is matched to it where the protocol is unclear.
 
 > Unofficial, third-party project. Not affiliated with or endorsed by Proton.
 > If you build on it, follow the operational requirements in the upstream SDK
@@ -10,18 +11,37 @@ and does the OpenPGP crypto directly.
 
 ## Status
 
-**Milestone 1 — session + read operations.** Implemented:
+**Milestone 2 — authenticated read/write.** Implemented:
 
-- Core: typed IDs, API response envelope, config, reqwest HTTP client with
-  `x-pm-uid` / `x-pm-appversion` / bearer auth and transparent 401 token refresh.
-- Session: `resume` from existing tokens, `end`.
-- Account: user keys, address keys, and Proton's bcrypt key-passphrase
-  derivation (the mailbox password is required even for read — see below).
-- Drive read: `get_my_files_folder`, `get_node`, `enumerate_folder_children`,
-  with share and node (link) decryption and recursive parent-key resolution.
+- **Core / HTTP**: typed IDs, API response envelope, config, reqwest client with
+  `x-pm-uid` / `x-pm-appversion` / bearer auth, transparent 401 refresh,
+  retry/backoff (408/429/502/503/504 + transient transport, `Retry-After` +
+  jitter), and per-request telemetry.
+- **Session**: SRP-6a password login (`begin`), TOTP 2FA
+  (`apply_second_factor_code`), scope refresh, `resume` from tokens, `end`.
+- **Account**: user keys, address keys, bcrypt key-passphrase derivation,
+  public-key resolution for authorship verification (`core/v4/keys/all`).
+- **Drive read**: `get_my_files_folder`, `get_node`, `enumerate_folder_children`,
+  `enumerate_nodes`, `enumerate_trash`, with share/node decryption and recursive
+  parent-key resolution.
+- **Download**: `download_file` / `download_file_to` (streaming), thumbnails,
+  content-manifest integrity + non-fatal signature verification.
+- **Upload**: `upload_file` / `upload_file_from` (streaming `Read`), new
+  revisions, caller-supplied thumbnails, and AEAD blocks (SEIPDv2 / AES-256-GCM)
+  alongside legacy SEIPDv1.
+- **Folder / node ops**: create, rename, trash, restore, delete, empty-trash,
+  and same-volume `move_node`.
+- **Events**: `main_volume_id`, `latest_event_id`, `enumerate_events`.
+- **Photos**: `ProtonPhotosClient` — timeline, photo get/download, upload.
+- **Caching**: pluggable entity cache (`with_entity_cache`); secrets stay
+  in-memory.
+- **Telemetry**: pluggable `Telemetry` observer (`with_telemetry`).
 
-Not yet implemented: SRP password login (`begin`), uploads/downloads, sharing,
-events, trash, photos, signature-verification enforcement, persistent caching.
+Not yet implemented: cross-volume move (needs `NewShareID` + re-signing),
+sharing, signature-verification *enforcement* (it is non-fatal metadata).
+
+Crypto paths have offline round-trip tests; the write/move paths still need live
+validation against a real account.
 
 ## Workspace
 
@@ -30,7 +50,7 @@ events, trash, photos, signature-verification enforcement, persistent caching.
 | `crates/proton-sdk` | Core account/session/crypto (`Proton.Sdk` analogue) |
 | `crates/proton-drive-sdk` | High-level Drive client (`Proton.Drive.Sdk` analogue) |
 
-OpenPGP is provided by the [`pgp`](https://crates.io/crates/pgp) crate (rPGP).
+OpenPGP is provided by the [`pgp`](https://crates.io/crates/pgp) crate (rPGP 0.16).
 
 ## The mailbox-password requirement
 
@@ -43,28 +63,26 @@ mailbox password + key salt --bcrypt--> key passphrase
   -> decrypt share/node passphrase -> unlock node key -> decrypt names
 ```
 
-`ProtonApiSession::resume` takes the tokens; `ProtonDriveClient::new` takes the
-mailbox password.
+`ProtonApiSession::begin` / `resume` handle the tokens; `ProtonDriveClient::new`
+takes the mailbox password.
 
 ## Usage
 
+SRP login (with 2FA), then read the my-files root:
+
 ```rust,no_run
 use proton_sdk::config::ProtonClientConfiguration;
-use proton_sdk::session::{PasswordMode, ProtonApiSession, ResumeParameters};
+use proton_sdk::session::ProtonApiSession;
 use proton_drive_sdk::ProtonDriveClient;
 
 # async fn run() -> proton_sdk::error::Result<()> {
 let config = ProtonClientConfiguration::new("external-drive-myapp@0.1.0-alpha");
-let session = ProtonApiSession::resume(config, ResumeParameters {
-    session_id: "uid".into(),
-    username: "user@proton.me".into(),
-    user_id: "user-id".into(),
-    access_token: "access".into(),
-    refresh_token: "refresh".into(),
-    scopes: vec![],
-    is_waiting_for_second_factor_code: false,
-    password_mode: PasswordMode::Single,
-})?;
+
+let mut session =
+    ProtonApiSession::begin(config, "user@proton.me", b"mailbox-password").await?;
+if session.is_waiting_for_second_factor() {
+    session.apply_second_factor_code("123456").await?;
+}
 
 let drive = ProtonDriveClient::new(&session, b"mailbox-password".to_vec());
 let root = drive.get_my_files_folder().await?;
@@ -75,11 +93,22 @@ for child in drive.enumerate_folder_children(&root.uid).await? {
 # }
 ```
 
+Already have tokens? Use `ProtonApiSession::resume(config, ResumeParameters {..})`
+instead of `begin`.
+
+A live smoke test lives in `crates/proton-drive-sdk/examples/live_login.rs`
+(reads `username` / `password` from a repo-root `.env`, TOTP from
+`PROTON_TOTP_SECRET`):
+
+```bash
+PROTON_TOTP_SECRET=... cargo run -p proton-drive-sdk --example live_login
+```
+
 ## Build & test
 
 ```bash
-cargo build
-cargo test
+cargo build   # 0 warnings / 0 errors
+cargo test    # offline crypto + derivation round-trip tests
 ```
 
 ## License