🧑‍💻 Restructure instantiator into modules (#245)

## What?
- Move the instantiator code from a single file to multiple submodules

## Why?
- Was too big to read

## How?
- Separate into different files inside the `instantiator` module

## Testing?
Normal tests to see if there's no compiler errors

pallets/funding/src/instantiator/macros.rs

@@ -0,0 +1,115 @@
+use super::*;
+
+#[macro_export]
+/// Example:
+/// ```
+/// use pallet_funding::assert_close_enough;
+/// use sp_arithmetic::Perquintill;
+///
+/// let real = 98u64;
+/// let desired = 100u64;
+/// assert_close_enough!(real, desired, Perquintill::from_float(0.98));
+/// // This would fail
+/// // assert_close_enough!(real, desired, Perquintill::from_float(0.99));
+/// ```
+macro_rules! assert_close_enough {
+	// Match when a message is provided
+	($real:expr, $desired:expr, $min_percentage:expr, $msg:expr) => {
+		let actual_percentage;
+		if $real <= $desired {
+			actual_percentage = Perquintill::from_rational($real, $desired);
+		} else {
+			actual_percentage = Perquintill::from_rational($desired, $real);
+		}
+		assert!(actual_percentage >= $min_percentage, $msg);
+	};
+	// Match when no message is provided
+	($real:expr, $desired:expr, $min_percentage:expr) => {
+		let actual_percentage;
+		if $real <= $desired {
+			actual_percentage = Perquintill::from_rational($real, $desired);
+		} else {
+			actual_percentage = Perquintill::from_rational($desired, $real);
+		}
+		assert!(
+			actual_percentage >= $min_percentage,
+			"Actual percentage too low for the set minimum: {:?} < {:?} for {:?} and {:?}",
+			actual_percentage,
+			$min_percentage,
+			$real,
+			$desired
+		);
+	};
+}
+
+#[macro_export]
+macro_rules! call_and_is_ok {
+		($inst: expr, $( $call: expr ),* ) => {
+			$inst.execute(|| {
+				$(
+					let result = $call;
+					assert!(result.is_ok(), "Call failed: {:?}", result);
+				)*
+			})
+		};
+	}
+#[macro_export]
+macro_rules! find_event {
+    ($runtime:ty, $pattern:pat, $($field_name:ident == $field_value:expr),+) => {
+	    {
+		    let events = frame_system::Pallet::<$runtime>::events();
+	        events.iter().find_map(|event_record| {
+			    let runtime_event = event_record.event.clone();
+			    let runtime_event = <<$runtime as crate::Config>::RuntimeEvent>::from(runtime_event);
+			    if let Ok(funding_event) = TryInto::<crate::Event<$runtime>>::try_into(runtime_event) {
+				     if let $pattern = funding_event {
+	                    let mut is_match = true;
+	                    $(
+	                        is_match &= $field_name == $field_value;
+	                    )+
+	                    if is_match {
+	                        return Some(funding_event.clone());
+	                    }
+	                }
+	                None
+			    } else {
+	                None
+	            }
+            })
+	    }
+    };
+}
+
+#[macro_export]
+macro_rules! extract_from_event {
+	($env: expr, $pattern:pat, $field:ident) => {
+		$env.execute(|| {
+			let events = System::events();
+
+			events.iter().find_map(|event_record| {
+				if let frame_system::EventRecord { event: RuntimeEvent::PolimecFunding($pattern), .. } = event_record {
+					Some($field.clone())
+				} else {
+					None
+				}
+			})
+		})
+	};
+}
+
+#[macro_export]
+macro_rules! define_names {
+		($($name:ident: $id:expr, $label:expr);* $(;)?) => {
+			$(
+				pub const $name: AccountId = $id;
+			)*
+
+			pub fn names() -> std::collections::HashMap<AccountId, &'static str> {
+				let mut names = std::collections::HashMap::new();
+				$(
+					names.insert($name, $label);
+				)*
+				names
+			}
+		};
+	}

pallets/funding/src/instantiator/mod.rs

@@ -0,0 +1,64 @@
+// Polimec Blockchain – https://www.polimec.org/
+// Copyright (C) Polimec 2022. All rights reserved.
+
+// The Polimec Blockchain is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// The Polimec Blockchain 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use crate::{
+	traits::{BondingRequirementCalculation, ProvideAssetPrice},
+	*,
+};
+use frame_support::{
+	pallet_prelude::*,
+	traits::{
+		fungible::{Inspect as FungibleInspect, InspectHold as FungibleInspectHold, Mutate as FungibleMutate},
+		fungibles::{
+			metadata::Inspect as MetadataInspect, roles::Inspect as RolesInspect, Inspect as FungiblesInspect,
+			Mutate as FungiblesMutate,
+		},
+		AccountTouch, Get, OnFinalize, OnIdle, OnInitialize,
+	},
+	weights::Weight,
+	Parameter,
+};
+use frame_system::pallet_prelude::BlockNumberFor;
+use itertools::Itertools;
+use parity_scale_codec::Decode;
+use polimec_common::{credentials::InvestorType, migration_types::MigrationOrigin};
+#[cfg(any(test, feature = "std", feature = "runtime-benchmarks"))]
+use polimec_common_test_utils::generate_did_from_account;
+use sp_arithmetic::{
+	traits::{SaturatedConversion, Saturating, Zero},
+	FixedPointNumber, Percent, Perquintill,
+};
+use sp_runtime::{
+	traits::{Convert, Member, One},
+	DispatchError,
+};
+use sp_std::{
+	cell::RefCell,
+	collections::{btree_map::*, btree_set::*},
+	iter::zip,
+	marker::PhantomData,
+};
+
+pub mod macros;
+pub use macros::*;
+pub mod types;
+pub use types::*;
+pub mod traits;
+pub use traits::*;
+#[cfg(feature = "std")]
+pub mod async_features;
+pub mod calculations;
+pub mod chain_interactions;

pallets/funding/src/instantiator/traits.rs

@@ -0,0 +1,26 @@
+use super::*;
+
+pub trait Deposits<T: Config> {
+	fn existential_deposits(&self) -> Vec<UserToPLMCBalance<T>>;
+}
+pub trait Accounts {
+	type Account;
+
+	fn accounts(&self) -> Vec<Self::Account>;
+}
+
+pub enum MergeOperation {
+	Add,
+	Subtract,
+}
+pub trait AccountMerge: Accounts + Sized {
+	/// The inner type of the Vec implementing this Trait.
+	type Inner;
+	/// Merge accounts in the list based on the operation.
+	fn merge_accounts(&self, ops: MergeOperation) -> Self;
+	/// Subtract amount of the matching accounts in the other list from the current list.
+	/// If the account is not present in the current list, it is ignored.
+	fn subtract_accounts(&self, other_list: Self) -> Self;
+
+	fn sum_accounts(&self, other_list: Self) -> Self;
+}