move economic security into it's own pallet (#596)

* move economic security into it's own pallet

* fix deny

* Update Cargo.toml, .github for the new crates

* Remove unused import

---------

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>

substrate/economic-security/pallet/Cargo.toml

@@ -0,0 +1,48 @@
+[package]
+name = "serai-economic-security-pallet"
+version = "0.1.0"
+description = "Economic Security pallet for Serai"
+license = "AGPL-3.0-only"
+repository = "https://github.com/serai-dex/serai/tree/develop/substrate/economic-security/pallet"
+authors = ["Akil Demir <akildemir72@gmail.com>"]
+edition = "2021"
+rust-version = "1.77"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[package.metadata.cargo-machete]
+ignored = ["scale", "scale-info"]
+
+[lints]
+workspace = true
+
+[dependencies]
+scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
+scale-info = { version = "2", default-features = false, features = ["derive"] }
+
+frame-system = { git = "https://github.com/serai-dex/substrate", default-features = false }
+frame-support = { git = "https://github.com/serai-dex/substrate", default-features = false }
+
+dex-pallet = { package = "serai-dex-pallet", path = "../../dex/pallet", default-features = false }
+coins-pallet = { package = "serai-coins-pallet", path = "../../coins/pallet", default-features = false }
+
+serai-primitives = { path = "../../primitives", default-features = false }
+
+[features]
+std = [
+  "scale/std",
+  "scale-info/std",
+
+  "frame-system/std",
+  "frame-support/std",
+
+  "dex-pallet/std",
+  "coins-pallet/std",
+
+  "serai-primitives/std",
+]
+try-runtime = [] # TODO
+
+default = ["std"]

substrate/economic-security/pallet/LICENSE

@@ -0,0 +1,15 @@
+AGPL-3.0-only license
+
+Copyright (c) 2024 Luke Parker
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License Version 3 as
+published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.

substrate/economic-security/pallet/src/lib.rs

@@ -0,0 +1,53 @@
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[allow(clippy::cast_possible_truncation, clippy::no_effect_underscore_binding, clippy::empty_docs)]
+#[frame_support::pallet]
+pub mod pallet {
+  use frame_system::pallet_prelude::*;
+  use frame_support::pallet_prelude::*;
+
+  use dex_pallet::{Config as DexConfig, Pallet as Dex};
+  use coins_pallet::{Config as CoinsConfig, AllowMint};
+
+  use serai_primitives::*;
+
+  #[pallet::config]
+  pub trait Config: frame_system::Config + CoinsConfig + DexConfig {
+    type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;
+  }
+
+  #[pallet::event]
+  #[pallet::generate_deposit(fn deposit_event)]
+  pub enum Event<T: Config> {
+    EconomicSecurityReached { network: NetworkId },
+  }
+
+  #[pallet::pallet]
+  pub struct Pallet<T>(PhantomData<T>);
+
+  #[pallet::storage]
+  #[pallet::getter(fn economic_security_block)]
+  pub(crate) type EconomicSecurityBlock<T: Config> =
+    StorageMap<_, Identity, NetworkId, BlockNumberFor<T>, OptionQuery>;
+
+  #[pallet::hooks]
+  impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
+    fn on_initialize(n: BlockNumberFor<T>) -> Weight {
+      // we accept we reached economic security once we can mint smallest amount of a network's coin
+      for coin in COINS {
+        let existing = EconomicSecurityBlock::<T>::get(coin.network());
+        if existing.is_none() &&
+          Dex::<T>::security_oracle_value(coin).is_some() &&
+          <T as CoinsConfig>::AllowMint::is_allowed(&Balance { coin, amount: Amount(1) })
+        {
+          EconomicSecurityBlock::<T>::set(coin.network(), Some(n));
+          Self::deposit_event(Event::EconomicSecurityReached { network: coin.network() });
+        }
+      }
+
+      Weight::zero() // TODO
+    }
+  }
+}
+
+pub use pallet::*;