1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166

// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Asset Conversion Ops pallet benchmarking.

use super::*;
use crate::Pallet as AssetConversionOps;
use frame_benchmarking::{v2::*, whitelisted_caller};
use frame_support::{
	assert_ok,
	traits::fungibles::{Create, Inspect, Mutate},
};
use frame_system::RawOrigin as SystemOrigin;
use pallet_asset_conversion::{BenchmarkHelper, Pallet as AssetConversion};
use sp_core::Get;
use sp_runtime::traits::One;

/// Provides a pair of amounts expected to serve as sufficient initial liquidity for a pool.
fn valid_liquidity_amount<T: Config>(ed1: T::Balance, ed2: T::Balance) -> (T::Balance, T::Balance)
where
	T::Assets: Inspect<T::AccountId>,
{
	let l =
		ed1.max(ed2) + T::MintMinLiquidity::get() + T::MintMinLiquidity::get() + T::Balance::one();
	(l, l)
}

/// Create the `asset` and mint the `amount` for the `caller`.
fn create_asset<T: Config>(caller: &T::AccountId, asset: &T::AssetKind, amount: T::Balance)
where
	T::Assets: Create<T::AccountId> + Mutate<T::AccountId>,
{
	if !T::Assets::asset_exists(asset.clone()) {
		assert_ok!(T::Assets::create(asset.clone(), caller.clone(), true, T::Balance::one()));
	}
	assert_ok!(T::Assets::mint_into(
		asset.clone(),
		&caller,
		amount + T::Assets::minimum_balance(asset.clone())
	));
}

/// Create the designated fee asset for pool creation.
fn create_fee_asset<T: Config>(caller: &T::AccountId)
where
	T::Assets: Create<T::AccountId> + Mutate<T::AccountId>,
{
	let fee_asset = T::PoolSetupFeeAsset::get();
	if !T::Assets::asset_exists(fee_asset.clone()) {
		assert_ok!(T::Assets::create(fee_asset.clone(), caller.clone(), true, T::Balance::one()));
	}
	assert_ok!(T::Assets::mint_into(
		fee_asset.clone(),
		&caller,
		T::Assets::minimum_balance(fee_asset)
	));
}

/// Mint the fee asset for the `caller` sufficient to cover the fee for creating a new pool.
fn mint_setup_fee_asset<T: Config>(
	caller: &T::AccountId,
	asset1: &T::AssetKind,
	asset2: &T::AssetKind,
	lp_token: &T::PoolAssetId,
) where
	T::Assets: Create<T::AccountId> + Mutate<T::AccountId>,
{
	assert_ok!(T::Assets::mint_into(
		T::PoolSetupFeeAsset::get(),
		&caller,
		T::PoolSetupFee::get() +
			T::Assets::deposit_required(asset1.clone()) +
			T::Assets::deposit_required(asset2.clone()) +
			T::PoolAssets::deposit_required(lp_token.clone())
	));
}

/// Creates a pool for a given asset pair.
///
/// This action mints the necessary amounts of the given assets for the `caller` to provide initial
/// liquidity. It returns the LP token ID along with a pair of amounts sufficient for the pool's
/// initial liquidity.
fn create_asset_and_pool<T: Config>(
	caller: &T::AccountId,
	asset1: &T::AssetKind,
	asset2: &T::AssetKind,
) -> (T::PoolAssetId, T::Balance, T::Balance)
where
	T::Assets: Create<T::AccountId> + Mutate<T::AccountId>,
{
	let (liquidity1, liquidity2) = valid_liquidity_amount::<T>(
		T::Assets::minimum_balance(asset1.clone()),
		T::Assets::minimum_balance(asset2.clone()),
	);
	create_asset::<T>(caller, asset1, liquidity1);
	create_asset::<T>(caller, asset2, liquidity2);
	let lp_token = AssetConversion::<T>::get_next_pool_asset_id();

	mint_setup_fee_asset::<T>(caller, asset1, asset2, &lp_token);

	assert_ok!(AssetConversion::<T>::create_pool(
		SystemOrigin::Signed(caller.clone()).into(),
		Box::new(asset1.clone()),
		Box::new(asset2.clone())
	));

	(lp_token, liquidity1, liquidity2)
}

fn assert_last_event<T: Config>(generic_event: <T as Config>::RuntimeEvent) {
	let events = frame_system::Pallet::<T>::events();
	let system_event: <T as frame_system::Config>::RuntimeEvent = generic_event.into();
	// compare to the last event record
	let frame_system::EventRecord { event, .. } = &events[events.len() - 1];
	assert_eq!(event, &system_event);
}

#[benchmarks(where T::Assets: Create<T::AccountId> + Mutate<T::AccountId>, T::PoolAssetId: Into<u32>,)]
mod benchmarks {
	use super::*;

	#[benchmark]
	fn migrate_to_new_account() {
		let caller: T::AccountId = whitelisted_caller();
		let (asset1, asset2) = T::BenchmarkHelper::create_pair(0, 1);

		create_fee_asset::<T>(&caller);
		let (_, liquidity1, liquidity2) = create_asset_and_pool::<T>(&caller, &asset1, &asset2);

		assert_ok!(AssetConversion::<T>::add_liquidity(
			SystemOrigin::Signed(caller.clone()).into(),
			Box::new(asset1.clone()),
			Box::new(asset2.clone()),
			liquidity1,
			liquidity2,
			T::Balance::one(),
			T::Balance::zero(),
			caller.clone(),
		));

		#[extrinsic_call]
		_(SystemOrigin::Signed(caller.clone()), Box::new(asset1.clone()), Box::new(asset2.clone()));

		let pool_id = T::PoolLocator::pool_id(&asset1, &asset2).unwrap();
		let (prior_account, new_account) = AssetConversionOps::<T>::addresses(&pool_id).unwrap();
		assert_last_event::<T>(
			Event::MigratedToNewAccount { pool_id, new_account, prior_account }.into(),
		);
	}

	impl_benchmark_test_suite!(AssetConversionOps, crate::mock::new_test_ext(), crate::mock::Test);
}