feat: PR with bumped version for release

programs/gpl_session/README.md

@@ -13,13 +13,15 @@ cargo add session-keys --features no-entrypoint
 
 # Usage
 
+The latest version uses `SessionTokenV2`. `SessionToken` (V1) is still supported for backwards compatibility — see [V1 usage](#v1-backwards-compatible) below.
+
 1. Import the dependencies
 
 ```rust
-use session_keys::{SessionError, SessionToken, session_auth_or, Session};
+use session_keys::{SessionError, SessionTokenV2, session_auth_or, Session};
 ```
 
-2. Derive the `Session` trait on your instruction struct
+2. Derive the `Session` trait on your instruction struct. The macro auto-detects V1 vs V2 from the `session_token` field type.
 
 ```rust
 #[derive(Accounts, Session)]
@@ -34,15 +36,15 @@ pub struct Instruction<'info> {
         authority = user.authority.key()
     )]
     // Session Tokens are passed as optional accounts
-    pub session_token: Option<Account<'info, SessionToken>>,
+    pub session_token: Option<Account<'info, SessionTokenV2>>,
 
     #[account(mut)]
     pub signer: Signer<'info>,
     .....
 }
 ```
 
-3. Add the `session_auth_or` macro to your instruction handler with fallback logic on who the instruction should validate the signer when sessions are not present and an appropirate ErrorCode. If you've used `require*!` macros in anchor_lang you already know how this works.
+3. Add the `session_auth_or` macro to your instruction handler with fallback logic on who the instruction should validate the signer when sessions are not present and an appropriate ErrorCode. If you've used `require*!` macros in anchor_lang you already know how this works.
 
 ```rust
 #[session_auth_or(
@@ -55,6 +57,98 @@ pub fn ix_handler(ctx: Context<Instruction>,) -> Result<()> {
 
 ```
 
-# Example
+# V1 (backwards-compatible)
+
+To keep using `SessionToken` (V1), import `SessionToken` instead of `SessionTokenV2` and use it as the field type:
+
+```rust
+use session_keys::{SessionError, SessionToken, session_auth_or, Session};
+
+#[derive(Accounts, Session)]
+pub struct Instruction<'info> {
+    ...
+    pub session_token: Option<Account<'info, SessionToken>>,
+    ...
+}
+```
+
+`#[derive(Session)]` picks the right trait implementation based on the field type. You can also use `#[derive(SessionV2)]` to require V2 explicitly.
+
+# Full V2 example
+
+A complete Anchor instruction using `SessionTokenV2`:
+
+```rust
+use anchor_lang::prelude::*;
+use session_keys::{session_auth_or, Session, SessionError, SessionTokenV2};
+
+declare_id!("YourProgramID11111111111111111111111111111111");
+
+#[program]
+pub mod my_program {
+    use super::*;
+
+    pub fn initialize(ctx: Context<Initialize>) -> Result<()> {
+        let counter = &mut ctx.accounts.counter;
+        counter.authority = *ctx.accounts.user.key;
+        counter.count = 0;
+        Ok(())
+    }
+
+    /// Either the session signer (via SessionTokenV2) or the original authority
+    /// can call this. If no session token is provided, the fallback check runs.
+    #[session_auth_or(
+        ctx.accounts.counter.authority.key() == ctx.accounts.signer.key(),
+        SessionError::InvalidToken
+    )]
+    pub fn increment(ctx: Context<Increment>) -> Result<()> {
+        ctx.accounts.counter.count += 1;
+        Ok(())
+    }
+}
+
+#[derive(Accounts)]
+pub struct Initialize<'info> {
+    #[account(mut)]
+    pub user: Signer<'info>,
+    #[account(
+        init,
+        payer = user,
+        space = 8 + 32 + 8,
+        seeds = [b"counter", user.key().as_ref()],
+        bump,
+    )]
+    pub counter: Account<'info, Counter>,
+    pub system_program: Program<'info, System>,
+}
+
+#[derive(Accounts, Session)]
+pub struct Increment<'info> {
+    #[account(mut)]
+    pub signer: Signer<'info>,
+
+    #[account(
+        mut,
+        seeds = [b"counter", counter.authority.key().as_ref()],
+        bump,
+    )]
+    pub counter: Account<'info, Counter>,
+
+    #[session(
+        signer = signer,
+        authority = counter.authority.key()
+    )]
+    pub session_token: Option<Account<'info, SessionTokenV2>>,
+}
+
+#[account]
+pub struct Counter {
+    pub authority: Pubkey,
+    pub count: u64,
+}
+```
+
+# More examples
 
-See [KamikazeJoe](https://github.com/magicblock-labs/Kamikaze-Joe) for an example of a game using session-keys.
+- [magicblock-engine-examples / session-keys](https://github.com/magicblock-labs/magicblock-engine-examples/tree/main/session-keys) — Anchor counter program using `SessionTokenV2` with the ephemeral rollups SDK, plus tests and a React frontend.
+- [KamikazeJoe](https://github.com/magicblock-labs/Kamikaze-Joe) — a game using session-keys.