git.delta.rocks / unique-network / refs/commits / 7192bb86e2c3

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617#![cfg_attr(not(feature = "std"), no_std)]1819use core::ops::Deref;20use frame_support::{ensure};21use pallet_evm::account::CrossAccountId;22use up_data_structs::{23	AccessMode, CollectionId, TokenId, CreateCollectionData, mapping::TokenAddressMapping,24	budget::Budget,25};26use pallet_common::{27	Error as CommonError, Event as CommonEvent, Pallet as PalletCommon, CollectionHandle,28	dispatch::CollectionDispatch,29};30use pallet_structure::Pallet as PalletStructure;31use pallet_evm_coder_substrate::WithRecorder;32use sp_core::H160;33use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};34use sp_std::collections::btree_map::BTreeMap;3536pub use pallet::*;3738use crate::erc::ERC20Events;39#[cfg(feature = "runtime-benchmarks")]40pub mod benchmarking;41pub mod common;42pub mod erc;43pub mod weights;4445pub type CreateItemData<T> = (<T as pallet_evm::account::Config>::CrossAccountId, u128);46pub(crate) type SelfWeightOf<T> = <T as Config>::WeightInfo;4748#[frame_support::pallet]49pub mod pallet {50	use frame_support::{Blake2_128, Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key};51	use up_data_structs::CollectionId;52	use super::weights::WeightInfo;5354	#[pallet::error]55	pub enum Error<T> {56		/// Not Fungible item data used to mint in Fungible collection.57		NotFungibleDataUsedToMintFungibleCollectionToken,58		/// Not default id passed as TokenId argument59		FungibleItemsHaveNoId,60		/// Tried to set data for fungible item61		FungibleItemsDontHaveData,62		/// Fungible token does not support nested63		FungibleDisallowsNesting,64	}6566	#[pallet::config]67	pub trait Config:68		frame_system::Config + pallet_common::Config + pallet_structure::Config69	{70		type WeightInfo: WeightInfo;71	}7273	#[pallet::pallet]74	#[pallet::generate_store(pub(super) trait Store)]75	pub struct Pallet<T>(_);7677	#[pallet::storage]78	pub type TotalSupply<T: Config> =79		StorageMap<Hasher = Twox64Concat, Key = CollectionId, Value = u128, QueryKind = ValueQuery>;8081	#[pallet::storage]82	pub type Balance<T: Config> = StorageNMap<83		Key = (84			Key<Twox64Concat, CollectionId>,85			Key<Blake2_128Concat, T::CrossAccountId>,86		),87		Value = u128,88		QueryKind = ValueQuery,89	>;9091	#[pallet::storage]92	pub type Allowance<T: Config> = StorageNMap<93		Key = (94			Key<Twox64Concat, CollectionId>,95			Key<Blake2_128, T::CrossAccountId>,96			Key<Blake2_128Concat, T::CrossAccountId>,97		),98		Value = u128,99		QueryKind = ValueQuery,100	>;101}102103pub struct FungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);104impl<T: Config> FungibleHandle<T> {105	pub fn cast(inner: pallet_common::CollectionHandle<T>) -> Self {106		Self(inner)107	}108	pub fn into_inner(self) -> pallet_common::CollectionHandle<T> {109		self.0110	}111}112impl<T: Config> WithRecorder<T> for FungibleHandle<T> {113	fn recorder(&self) -> &pallet_evm_coder_substrate::SubstrateRecorder<T> {114		self.0.recorder()115	}116	fn into_recorder(self) -> pallet_evm_coder_substrate::SubstrateRecorder<T> {117		self.0.into_recorder()118	}119}120impl<T: Config> Deref for FungibleHandle<T> {121	type Target = pallet_common::CollectionHandle<T>;122123	fn deref(&self) -> &Self::Target {124		&self.0125	}126}127128impl<T: Config> Pallet<T> {129	pub fn init_collection(130		owner: T::AccountId,131		data: CreateCollectionData<T::AccountId>,132	) -> Result<CollectionId, DispatchError> {133		<PalletCommon<T>>::init_collection(owner, data)134	}135	pub fn destroy_collection(136		collection: FungibleHandle<T>,137		sender: &T::CrossAccountId,138	) -> DispatchResult {139		let id = collection.id;140141		// =========142143		PalletCommon::destroy_collection(collection.0, sender)?;144145		<TotalSupply<T>>::remove(id);146		<Balance<T>>::remove_prefix((id,), None);147		<Allowance<T>>::remove_prefix((id,), None);148		Ok(())149	}150151	pub fn burn(152		collection: &FungibleHandle<T>,153		owner: &T::CrossAccountId,154		amount: u128,155	) -> DispatchResult {156		let total_supply = <TotalSupply<T>>::get(collection.id)157			.checked_sub(amount)158			.ok_or(<CommonError<T>>::TokenValueTooLow)?;159160		let balance = <Balance<T>>::get((collection.id, owner))161			.checked_sub(amount)162			.ok_or(<CommonError<T>>::TokenValueTooLow)?;163164		if collection.access == AccessMode::AllowList {165			collection.check_allowlist(owner)?;166		}167168		// =========169170		if balance == 0 {171			<Balance<T>>::remove((collection.id, owner));172		} else {173			<Balance<T>>::insert((collection.id, owner), balance);174		}175		<TotalSupply<T>>::insert(collection.id, total_supply);176177		collection.log_mirrored(ERC20Events::Transfer {178			from: *owner.as_eth(),179			to: H160::default(),180			value: amount.into(),181		});182		<PalletCommon<T>>::deposit_event(CommonEvent::ItemDestroyed(183			collection.id,184			TokenId::default(),185			owner.clone(),186			amount,187		));188		Ok(())189	}190191	pub fn transfer(192		collection: &FungibleHandle<T>,193		from: &T::CrossAccountId,194		to: &T::CrossAccountId,195		amount: u128,196		nesting_budget: &dyn Budget,197	) -> DispatchResult {198		ensure!(199			collection.limits.transfers_enabled(),200			<CommonError<T>>::TransferNotAllowed,201		);202203		if collection.access == AccessMode::AllowList {204			collection.check_allowlist(from)?;205			collection.check_allowlist(to)?;206		}207		<PalletCommon<T>>::ensure_correct_receiver(to)?;208209		let balance_from = <Balance<T>>::get((collection.id, from))210			.checked_sub(amount)211			.ok_or(<CommonError<T>>::TokenValueTooLow)?;212		let balance_to = if from != to {213			Some(214				<Balance<T>>::get((collection.id, to))215					.checked_add(amount)216					.ok_or(ArithmeticError::Overflow)?,217			)218		} else {219			None220		};221222		if let Some(target) = T::CrossTokenAddressMapping::address_to_token(to) {223			let handle = <CollectionHandle<T>>::try_get(target.0)?;224			let dispatch = T::CollectionDispatch::dispatch(handle);225			let dispatch = dispatch.as_dyn();226227			dispatch.check_nesting(from.clone(), collection.id, target.1, nesting_budget)?;228		}229230		// =========231232		if let Some(balance_to) = balance_to {233			// from != to234			if balance_from == 0 {235				<Balance<T>>::remove((collection.id, from));236			} else {237				<Balance<T>>::insert((collection.id, from), balance_from);238			}239			<Balance<T>>::insert((collection.id, to), balance_to);240		}241242		collection.log_mirrored(ERC20Events::Transfer {243			from: *from.as_eth(),244			to: *to.as_eth(),245			value: amount.into(),246		});247		<PalletCommon<T>>::deposit_event(CommonEvent::Transfer(248			collection.id,249			TokenId::default(),250			from.clone(),251			to.clone(),252			amount,253		));254		Ok(())255	}256257	pub fn create_multiple_items(258		collection: &FungibleHandle<T>,259		sender: &T::CrossAccountId,260		data: BTreeMap<T::CrossAccountId, u128>,261		nesting_budget: &dyn Budget,262	) -> DispatchResult {263		if !collection.is_owner_or_admin(sender) {264			ensure!(265				collection.mint_mode,266				<CommonError<T>>::PublicMintingNotAllowed267			);268			collection.check_allowlist(sender)?;269270			for (owner, _) in data.iter() {271				collection.check_allowlist(owner)?;272			}273		}274275		let total_supply = data276			.iter()277			.map(|(_, v)| *v)278			.try_fold(<TotalSupply<T>>::get(collection.id), |acc, v| {279				acc.checked_add(v)280			})281			.ok_or(ArithmeticError::Overflow)?;282283		let mut balances = data;284		for (k, v) in balances.iter_mut() {285			*v = <Balance<T>>::get((collection.id, &k))286				.checked_add(*v)287				.ok_or(ArithmeticError::Overflow)?;288		}289290		for (to, _) in balances.iter() {291			if let Some(target) = T::CrossTokenAddressMapping::address_to_token(to) {292				let handle = <CollectionHandle<T>>::try_get(target.0)?;293				let dispatch = T::CollectionDispatch::dispatch(handle);294				let dispatch = dispatch.as_dyn();295296				dispatch.check_nesting(sender.clone(), collection.id, target.1, nesting_budget)?;297			}298		}299300		// =========301302		<TotalSupply<T>>::insert(collection.id, total_supply);303		for (user, amount) in balances {304			<Balance<T>>::insert((collection.id, &user), amount);305306			collection.log_mirrored(ERC20Events::Transfer {307				from: H160::default(),308				to: *user.as_eth(),309				value: amount.into(),310			});311			<PalletCommon<T>>::deposit_event(CommonEvent::ItemCreated(312				collection.id,313				TokenId::default(),314				user.clone(),315				amount,316			));317		}318319		Ok(())320	}321322	fn set_allowance_unchecked(323		collection: &FungibleHandle<T>,324		owner: &T::CrossAccountId,325		spender: &T::CrossAccountId,326		amount: u128,327	) {328		if amount == 0 {329			<Allowance<T>>::remove((collection.id, owner, spender));330		} else {331			<Allowance<T>>::insert((collection.id, owner, spender), amount);332		}333334		collection.log_mirrored(ERC20Events::Approval {335			owner: *owner.as_eth(),336			spender: *spender.as_eth(),337			value: amount.into(),338		});339		<PalletCommon<T>>::deposit_event(CommonEvent::Approved(340			collection.id,341			TokenId(0),342			owner.clone(),343			spender.clone(),344			amount,345		));346	}347348	pub fn set_allowance(349		collection: &FungibleHandle<T>,350		owner: &T::CrossAccountId,351		spender: &T::CrossAccountId,352		amount: u128,353	) -> DispatchResult {354		if collection.access == AccessMode::AllowList {355			collection.check_allowlist(owner)?;356			collection.check_allowlist(spender)?;357		}358359		if <Balance<T>>::get((collection.id, owner)) < amount {360			ensure!(361				collection.ignores_owned_amount(owner),362				<CommonError<T>>::CantApproveMoreThanOwned363			);364		}365366		// =========367368		Self::set_allowance_unchecked(collection, owner, spender, amount);369		Ok(())370	}371372	fn check_allowed(373		collection: &FungibleHandle<T>,374		spender: &T::CrossAccountId,375		from: &T::CrossAccountId,376		amount: u128,377		nesting_budget: &dyn Budget,378	) -> Result<Option<u128>, DispatchError> {379		if spender.conv_eq(from) {380			return Ok(None);381		}382		if collection.access == AccessMode::AllowList {383			// `from`, `to` checked in [`transfer`]384			collection.check_allowlist(spender)?;385		}386		if let Some(source) = T::CrossTokenAddressMapping::address_to_token(from) {387			// TODO: should collection owner be allowed to perform this transfer?388			ensure!(389				<PalletStructure<T>>::indirectly_owned(390					spender.clone(),391					source.0,392					source.1,393					nesting_budget394				)?,395				<CommonError<T>>::ApprovedValueTooLow,396			);397			return Ok(None);398		}399		let allowance = <Allowance<T>>::get((collection.id, from, spender)).checked_sub(amount);400		if allowance.is_none() {401			ensure!(402				collection.ignores_allowance(spender),403				<CommonError<T>>::ApprovedValueTooLow404			);405		}406407		Ok(allowance)408	}409410	pub fn transfer_from(411		collection: &FungibleHandle<T>,412		spender: &T::CrossAccountId,413		from: &T::CrossAccountId,414		to: &T::CrossAccountId,415		amount: u128,416		nesting_budget: &dyn Budget,417	) -> DispatchResult {418		let allowance = Self::check_allowed(collection, spender, from, amount, nesting_budget)?;419420		// =========421422		Self::transfer(collection, from, to, amount, nesting_budget)?;423		if let Some(allowance) = allowance {424			Self::set_allowance_unchecked(collection, from, spender, allowance);425		}426		Ok(())427	}428429	pub fn burn_from(430		collection: &FungibleHandle<T>,431		spender: &T::CrossAccountId,432		from: &T::CrossAccountId,433		amount: u128,434		nesting_budget: &dyn Budget,435	) -> DispatchResult {436		let allowance = Self::check_allowed(collection, spender, from, amount, nesting_budget)?;437438		// =========439440		Self::burn(collection, from, amount)?;441		if let Some(allowance) = allowance {442			Self::set_allowance_unchecked(collection, from, spender, allowance);443		}444		Ok(())445	}446447	/// Delegated to `create_multiple_items`448	pub fn create_item(449		collection: &FungibleHandle<T>,450		sender: &T::CrossAccountId,451		data: CreateItemData<T>,452		nesting_budget: &dyn Budget,453	) -> DispatchResult {454		Self::create_multiple_items(455			collection,456			sender,457			[(data.0, data.1)].into_iter().collect(),458			nesting_budget,459		)460	}461}