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/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::*;