Add pallet sessions to runtime, create pallet-tendermint

substrate/pallet-tendermint/Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "pallet-tendermint"
+version = "0.1.0"
+description = "Tendermint pallet for Substrate"
+license = "AGPL-3.0-only"
+repository = "https://github.com/serai-dex/serai/tree/develop/substrate/pallet-tendermint"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+edition = "2021"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+
+parity-scale-codec = { version = "3", default-features = false, features = ["derive"] }
+scale-info = { version = "2", default-features = false, features = ["derive"] }
+
+sp-application-crypto = { git = "https://github.com/serai-dex/substrate", default-features = false }
+
+frame-system = { git = "https://github.com/serai-dex/substrate", default-features = false }
+frame-support = { git = "https://github.com/serai-dex/substrate", default-features = false }
+
+[features]
+std = [
+  "sp-application-crypto/std",
+
+  "frame-system/std",
+  "frame-support/std",
+]
+
+runtime-benchmarks = [
+  "frame-system/runtime-benchmarks",
+  "frame-support/runtime-benchmarks",
+]
+
+default = ["std"]

substrate/pallet-tendermint/src/lib.rs

@@ -0,0 +1,60 @@
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use frame_support::traits::OneSessionHandler;
+
+#[frame_support::pallet]
+pub mod pallet {
+  use frame_support::pallet_prelude::*;
+
+  #[pallet::config]
+  pub trait Config: frame_system::Config {}
+
+  #[pallet::pallet]
+  pub struct Pallet<T>(PhantomData<T>);
+}
+
+pub use pallet::*;
+
+pub mod crypto {
+  use sp_application_crypto::{KeyTypeId, app_crypto, sr25519};
+  app_crypto!(sr25519, KeyTypeId(*b"tend"));
+
+  impl<C> sp_application_crypto::BoundToRuntimeAppPublic for crate::Pallet<C> {
+    type Public = Public;
+  }
+
+  sp_application_crypto::with_pair! {
+    pub type AuthorityPair = Pair;
+  }
+  pub type AuthoritySignature = Signature;
+  pub type AuthorityId = Public;
+}
+
+impl<C, V> OneSessionHandler<V> for Pallet<C> {
+  type Key = crypto::Public;
+
+  fn on_genesis_session<'a, I: 'a>(_validators: I)
+  where
+    I: Iterator<Item = (&'a V, Self::Key)>,
+    V: 'a,
+  {
+  }
+
+  fn on_new_session<'a, I: 'a>(_changed: bool, _validators: I, _queued: I)
+  where
+    I: Iterator<Item = (&'a V, Self::Key)>,
+    V: 'a,
+  {
+    /*
+    if !changed {
+      return;
+    }
+
+    for validator in validators {
+      ...
+    }
+    */
+  }
+
+  fn on_disabled(_validator_index: u32) {}
+}