[wip] Add stake interface

Author: febo

Cargo.toml

@@ -1,12 +1,10 @@
 [workspace]
 resolver = "2"
-members = ["clients/rust", "program"]
+members = ["clients/rust", "interface", "program"]
 
 [workspace.metadata.cli]
 solana = "edge"
 
-# Specify Rust toolchains for rustfmt, clippy, and build.
-# Any unprovided toolchains default to stable.
 [workspace.metadata.toolchains]
 format = "nightly-2023-10-05"
 lint = "nightly-2023-10-05"

interface/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "solana-stake-interface"
+version = "0.1.0"
+description = "Instructions and constructors for the Stake program"
+repository = "https://github.com/solana-program/stake"
+edition = "2021"
+readme = "README.md"
+license-file = "../LICENSE"
+
+[dependencies]
+borsh = { version = "1.5.1", features = ["derive", "unstable__schema"] }
+borsh0-10 = { package = "borsh", version = "0.10.3" }
+num-derive = "0.4"
+num-traits = "0.2"
+serde = { version="1.0.210" }
+solana-decode-error = { version="2.1.0", git="https://github.com/anza-xyz/agave.git" }
+serde_derive = { version="1.0.210" }
+solana-clock = { version="2.1.0", features=["serde"], git="https://github.com/anza-xyz/agave.git" }
+solana-instruction = { version="2.1.0", features=["bincode"], git="https://github.com/anza-xyz/agave.git" }
+solana-program = { version="2.1.0", git="https://github.com/anza-xyz/agave.git" }
+solana-program-error = { version="2.1.0", features=["serde"], git="https://github.com/anza-xyz/agave.git" }
+solana-pubkey = { version="2.1.0", features=["serde"], git="https://github.com/anza-xyz/agave.git" }
+
+[dev-dependencies]
+assert_matches = "1.5.0"
+bincode = "1.3.3"
+static_assertions = "1.1.0"

interface/src/config.rs

@@ -0,0 +1,34 @@
+//! config for staking
+//!  carries variables that the stake program cares about
+
+#[deprecated(
+    since = "1.16.7",
+    note = "Please use `solana_sdk::stake::state::{DEFAULT_SLASH_PENALTY, DEFAULT_WARMUP_COOLDOWN_RATE}` instead"
+)]
+pub use super::state::{DEFAULT_SLASH_PENALTY, DEFAULT_WARMUP_COOLDOWN_RATE};
+use serde_derive::{Deserialize, Serialize};
+use solana_pubkey::declare_deprecated_id;
+
+// stake config ID
+declare_deprecated_id!("StakeConfig11111111111111111111111111111111");
+
+#[deprecated(
+    since = "1.16.7",
+    note = "Please use `solana_sdk::stake::state::warmup_cooldown_rate()` instead"
+)]
+#[derive(Serialize, Deserialize, Debug, PartialEq, Clone, Copy)]
+pub struct Config {
+    /// how much stake we can activate/deactivate per-epoch as a fraction of currently effective stake
+    pub warmup_cooldown_rate: f64,
+    /// percentage of stake lost when slash, expressed as a portion of u8::MAX
+    pub slash_penalty: u8,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            warmup_cooldown_rate: DEFAULT_WARMUP_COOLDOWN_RATE,
+            slash_penalty: DEFAULT_SLASH_PENALTY,
+        }
+    }
+}