feat: move initial accounts data into genesis

programs/authenticated_transfer/core/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "authenticated_transfer_core"
+version = "0.1.0"
+edition = "2024"
+license = { workspace = true }
+
+[lints]
+workspace = true
+
+[dependencies]
+serde.workspace = true

programs/authenticated_transfer/core/src/lib.rs

@@ -0,0 +1,29 @@
+//! Core data structures for the Authenticated Transfer Program.
+
+use serde::{Deserialize, Serialize};
+
+/// Instruction type for the Authenticated Transfer program.
+#[derive(Serialize, Deserialize)]
+pub enum Instruction {
+    /// Transfer `amount` of native balance from sender to recipient.
+    ///
+    /// Required accounts: `[sender, recipient]`.
+    Transfer { amount: u128 },
+
+    /// Initialize a new account under the ownership of this program.
+    ///
+    /// Required accounts: `[account_to_initialize]`.
+    Initialize,
+
+    /// Mint `amount` into a new account at genesis (`block_id` == 0).
+    ///
+    /// Claims the target account (sets `program_owner` to `authenticated_transfer` program id)
+    /// and sets its balance in a single operation.
+    ///
+    /// Required accounts: `[target_account, clock_account]`.
+    ///
+    /// Panics if:
+    /// - `target_account` is not in the default (uninitialized) state
+    /// - clock's `block_id` is not 0
+    Mint { amount: u128 },
+}