Initial In Instructions pallet and Serai client lib (#233)

* Initial work on an In Inherents pallet

* Add an event for when a batch is executed

* Add a dummy provider for InInstructions

* Add in-instructions to the node

* Add the Serai runtime API to the processor

* Move processor tests around

* Build a subxt Client around Serai

* Successfully get Batch events from Serai

Renamed processor/substrate to processor/serai.

* Much more robust InInstruction pallet

* Implement the workaround from https://github.com/paritytech/subxt/issues/602

* Initial prototype of processor generated InInstructions

* Correct PendingCoins data flow for InInstructions

* Minor lint to in-instructions

* Remove the global Serai connection for a partial re-impl

* Correct ID handling of the processor test

* Workaround the delay in the subscription

* Make an unwrap an if let Some, remove old comments

* Lint the processor toml

* Rebase and update

* Move substrate/in-instructions to substrate/in-instructions/pallet

* Start an in-instructions primitives lib

* Properly update processor to subxt 0.24

Also corrects failures from the rebase.

* in-instructions cargo update

* Implement IsFatalError

* is_inherent -> true

* Rename in-instructions crates and misc cleanup

* Update documentation

* cargo update

* Misc update fixes

* Replace height with block_number

* Update processor src to latest subxt

* Correct pipeline for InInstructions testing

* Remove runtime::AccountId for serai_primitives::NativeAddress

* Rewrite the in-instructions pallet

Complete with respect to the currently written docs.

Drops the custom serializer for just using SCALE.

Makes slight tweaks as relevant.

* Move instructions' InherentDataProvider to a client crate

* Correct doc gen

* Add serde to in-instructions-primitives

* Add in-instructions-primitives to pallet

* Heights -> BlockNumbers

* Get batch pub test loop working

* Update in instructions pallet terminology

Removes the ambiguous Coin for Update.

Removes pending/artificial latency for furture client work.

Also moves to using serai_primitives::Coin.

* Add a BlockNumber primitive

* Belated cargo fmt

* Further document why DifferentBatch isn't fatal

* Correct processor sleeps

* Remove metadata at compile time, add test framework for Serai nodes

* Remove manual RPC client

* Simplify update test

* Improve re-exporting behavior of serai-runtime

It now re-exports all pallets underneath it.

* Add a function to get storage values to the Serai RPC

* Update substrate/ to latest substrate

* Create a dedicated crate for the Serai RPC

* Remove unused dependencies in substrate/

* Remove unused dependencies in coins/

Out of scope for this branch, just minor and path of least resistance.

* Use substrate/serai/client for the Serai RPC lib

It's a bit out of place, since these client folders are intended for the node to
access pallets and so on. This is for end-users to access Serai as a whole.

In that sense, it made more sense as a top level folder, yet that also felt
out of place.

* Move InInstructions test to serai-client for now

* Final cleanup

* Update deny.toml

* Cargo.lock update from merging develop

* Update nightly

Attempt to work around the current CI failure, which is a Rust ICE.

We previously didn't upgrade due to clippy 10134, yet that's been reverted.

* clippy

* clippy

* fmt

* NativeAddress -> SeraiAddress

* Sec fix on non-provided updates and doc fixes

* Add Serai as a Coin

Necessary in order to swap to Serai.

* Add a BlockHash type, used for batch IDs

* Remove origin from InInstruction

Makes InInstructionTarget. Adds RefundableInInstruction with origin.

* Document storage items in in-instructions

* Rename serai/client/tests/serai.rs to updates.rs

It only tested publishing updates and their successful acceptance.

substrate/validator-sets/pallet/src/lib.rs

@@ -17,14 +17,14 @@ pub mod pallet {
   }
 
   #[pallet::genesis_config]
-  #[derive(Clone, PartialEq, Eq, Debug, Encode, Decode, MaxEncodedLen)]
+  #[derive(Clone, PartialEq, Eq, Debug, Encode, Decode)]
   pub struct GenesisConfig<T: Config> {
     /// Bond requirement to join the initial validator set.
     /// Every participant at genesis will automatically be assumed to have this much bond.
     /// This bond cannot be withdrawn however as there's no stake behind it.
     pub bond: Amount,
-    /// Amount of coins to spawn the network with in the initial validator set.
-    pub coins: Coin,
+    /// Coins to spawn the network with in the initial validator set.
+    pub coins: Vec<Coin>,
     /// List of participants to place in the genesis set.
     pub participants: Vec<T::AccountId>,
   }
@@ -32,7 +32,7 @@ pub mod pallet {
   #[cfg(feature = "std")]
   impl<T: Config> Default for GenesisConfig<T> {
     fn default() -> Self {
-      GenesisConfig { bond: Amount(1), coins: Coin(0), participants: vec![] }
+      GenesisConfig { bond: Amount(1), coins: vec![], participants: vec![] }
     }
   }
 
@@ -95,11 +95,6 @@ pub mod pallet {
   #[pallet::genesis_build]
   impl<T: Config> GenesisBuild<T> for GenesisConfig<T> {
     fn build(&self) {
-      let mut coins = Vec::new();
-      for coin in 0 .. self.coins.0 {
-        coins.push(Coin(coin));
-      }
-
       let mut participants = Vec::new();
       for participant in self.participants.clone() {
         participants.push((participant, self.bond));
@@ -109,7 +104,7 @@ pub mod pallet {
         ValidatorSetInstance(Session(0), ValidatorSetIndex(0)),
         Some(ValidatorSet {
           bond: self.bond,
-          coins: BoundedVec::try_from(coins).unwrap(),
+          coins: BoundedVec::try_from(self.coins.clone()).unwrap(),
           participants: BoundedVec::try_from(participants).unwrap(),
         }),
       );