difftreelog
feat xcm nft support
in: master
5 files changed
pallets/common/src/lib.rsdiffbeforeafterboth--- a/pallets/common/src/lib.rs
+++ b/pallets/common/src/lib.rs
@@ -2351,6 +2351,11 @@
/// Is the collection a foreign one?
fn is_foreign(&self) -> bool;
+ /// Does the token have children?
+ fn token_has_children(&self, _token: TokenId) -> bool {
+ false
+ }
+
/// Create a collection's item using a transaction.
///
/// This function performs additional XCM-related checks before the actual creation.
pallets/foreign-assets/src/lib.rsdiffbeforeafterboth--- a/pallets/foreign-assets/src/lib.rs
+++ b/pallets/foreign-assets/src/lib.rs
@@ -364,7 +364,7 @@
fn check_out(_dest: &MultiLocation, _what: &MultiAsset, _context: &XcmContext) {}
- fn deposit_asset(what: &MultiAsset, to: &MultiLocation, context: &XcmContext) -> XcmResult {
+ fn deposit_asset(what: &MultiAsset, to: &MultiLocation, _context: &XcmContext) -> XcmResult {
let collection_id = Self::multiasset_to_collection(what)?;
let dispatch =
T::CollectionDispatch::dispatch(collection_id).map_err(|_| XcmError::AssetNotFound)?;
@@ -397,7 +397,42 @@
from: &MultiLocation,
_maybe_context: Option<&XcmContext>,
) -> Result<staging_xcm_executor::Assets, XcmError> {
- Err(XcmError::Unimplemented)
+ let from = T::LocationToAccountId::convert_location(from)
+ .ok_or(XcmExecutorError::AccountIdConversionFailed)?;
+
+ let collection_id = Self::multiasset_to_collection(what)?;
+ let dispatch =
+ T::CollectionDispatch::dispatch(collection_id).map_err(|_| XcmError::AssetNotFound)?;
+
+ let collection = dispatch.as_dyn();
+ let xcm_ext = collection.xcm_extensions().ok_or(XcmError::NoPermission)?;
+
+ match what.fun {
+ Fungibility::Fungible(amount) => xcm_ext
+ .burn_item(from, TokenId::default(), amount)
+ .map_err(|_| XcmError::FailedToTransactAsset("fungible item withdraw failed"))?,
+
+ Fungibility::NonFungible(asset_instance) => {
+ let token_id =
+ Self::asset_instance_to_token_id(xcm_ext, collection_id, &asset_instance)?
+ .ok_or(XcmError::AssetNotFound)?;
+
+ if xcm_ext.token_has_children(token_id) {
+ return Err(XcmError::Unimplemented);
+ }
+
+ let depositor = &from;
+ let to = Self::pallet_account();
+ let amount = 1;
+ xcm_ext
+ .transfer_item(depositor, &from, &to, token_id, amount, &ZeroBudget)
+ .map_err(|_| {
+ XcmError::FailedToTransactAsset("nonfungible item withdraw failed")
+ })?;
+ }
+ }
+
+ Ok(what.clone().into())
}
fn internal_transfer_asset(
@@ -406,7 +441,49 @@
to: &MultiLocation,
_context: &XcmContext,
) -> Result<staging_xcm_executor::Assets, XcmError> {
- Err(XcmError::Unimplemented)
+ let collection_id = Self::multiasset_to_collection(what)?;
+
+ let dispatch =
+ T::CollectionDispatch::dispatch(collection_id).map_err(|_| XcmError::AssetNotFound)?;
+ let collection = dispatch.as_dyn();
+ let xcm_ext = collection.xcm_extensions().ok_or(XcmError::NoPermission)?;
+
+ let from = T::LocationToAccountId::convert_location(from)
+ .ok_or(XcmExecutorError::AccountIdConversionFailed)?;
+
+ let to = T::LocationToAccountId::convert_location(to)
+ .ok_or(XcmExecutorError::AccountIdConversionFailed)?;
+
+ let depositor = &from;
+
+ match what.fun {
+ Fungibility::Fungible(amount) => xcm_ext
+ .transfer_item(
+ depositor,
+ &from,
+ &to,
+ TokenId::default(),
+ amount,
+ &ZeroBudget,
+ )
+ .map_err(|_| XcmError::FailedToTransactAsset("fungible item transfer failed"))?,
+
+ Fungibility::NonFungible(asset_instance) => {
+ let token_id =
+ Self::asset_instance_to_token_id(xcm_ext, collection_id, &asset_instance)?
+ .ok_or(XcmError::AssetNotFound)?;
+
+ let amount = 1;
+
+ xcm_ext
+ .transfer_item(depositor, &from, &to, token_id, amount, &ZeroBudget)
+ .map_err(|_| {
+ XcmError::FailedToTransactAsset("nonfungible item transfer failed")
+ })?;
+ }
+ }
+
+ Ok(what.clone().into())
}
}
pallets/fungible/src/lib.rsdiffbeforeafterboth1// 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//! # Fungible Pallet18//!19//! The Fungible pallet provides functionality for dealing with fungible assets.20//!21//! - [`CreateItemData`]22//! - [`Config`]23//! - [`FungibleHandle`]24//! - [`Pallet`]25//! - [`TotalSupply`]26//! - [`Balance`]27//! - [`Allowance`]28//! - [`Error`]29//!30//! ## Fungible tokens31//!32//! Fungible tokens or assets are divisible and non-unique. For instance,33//! fiat currencies like the dollar are fungible: A $1 bill34//! in New York City has the same value as a $1 bill in Miami.35//! A fungible token can also be a cryptocurrency like Bitcoin: 1 BTC is worth 1 BTC,36//! no matter where it is issued. Thus, the fungibility refers to a specific currency’s37//! ability to maintain one standard value. As well, it needs to have uniform acceptance.38//! This means that a currency’s history should not be able to affect its value,39//! and this is due to the fact that each piece that is a part of the currency is equal40//! in value when compared to every other piece of that exact same currency.41//! In the world of cryptocurrencies, this is essentially a coin or a token42//! that can be replaced by another identical coin or token, and they are43//! both mutually interchangeable. A popular implementation of fungible tokens is44//! the ERC-20 token standard.45//!46//! ### ERC-2047//!48//! The [ERC-20](https://ethereum.org/en/developers/docs/standards/tokens/erc-20/) (Ethereum Request for Comments 20), proposed by Fabian Vogelsteller in November 2015,49//! is a Token Standard that implements an API for tokens within Smart Contracts.50//!51//! Example functionalities ERC-20 provides:52//!53//! * transfer tokens from one account to another54//! * get the current token balance of an account55//! * get the total supply of the token available on the network56//! * approve whether an amount of token from an account can be spent by a third-party account57//!58//! ## Overview59//!60//! The module provides functionality for asset management of fungible asset, supports ERC-20 standart, includes:61//!62//! * Asset Issuance63//! * Asset Transferal64//! * Asset Destruction65//! * Delegated Asset Transfers66//!67//! **NOTE:** The created fungible asset always has `token_id` = 0.68//! So `tokenA` and `tokenB` will have different `collection_id`.69//!70//! ### Implementations71//!72//! The Fungible pallet provides implementations for the following traits.73//!74//! - [`WithRecorder`](pallet_evm_coder_substrate::WithRecorder): Trait for EVM support75//! - [`CommonCollectionOperations`](pallet_common::CommonCollectionOperations): Functions for dealing with collections76//! - [`CommonWeightInfo`](pallet_common::CommonWeightInfo): Functions for retrieval of transaction weight77//! - [`CommonEvmHandler`](pallet_common::erc::CommonEvmHandler): Function for handling EVM runtime calls7879#![cfg_attr(not(feature = "std"), no_std)]8081use core::ops::Deref;8283use evm_coder::ToLog;84use frame_support::{dispatch::PostDispatchInfo, ensure, pallet_prelude::*};85pub use pallet::*;86use pallet_common::{87 eth::collection_id_to_address, helpers::add_weight_to_post_info,88 weights::WeightInfo as CommonWeightInfo, Error as CommonError, Event as CommonEvent,89 Pallet as PalletCommon, SelfWeightOf as PalletCommonWeightOf,90};91use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm};92use pallet_evm_coder_substrate::WithRecorder;93use pallet_structure::Pallet as PalletStructure;94use sp_core::H160;95use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};96use sp_std::{collections::btree_map::BTreeMap, vec::Vec};97use up_data_structs::{98 budget::{Budget, ZeroBudget},99 mapping::TokenAddressMapping,100 AccessMode, CollectionId, CreateCollectionData, Property, PropertyKey, TokenId,101};102use weights::WeightInfo;103104use crate::erc::ERC20Events;105#[cfg(feature = "runtime-benchmarks")]106pub mod benchmarking;107pub mod common;108pub mod erc;109pub mod weights;110111pub type CreateItemData<T> = (<T as pallet_evm::Config>::CrossAccountId, u128);112pub(crate) type SelfWeightOf<T> = <T as Config>::WeightInfo;113114#[frame_support::pallet]115pub mod pallet {116 use frame_support::{117 pallet_prelude::*, storage::Key, Blake2_128, Blake2_128Concat, Twox64Concat,118 };119 use up_data_structs::CollectionId;120121 use super::weights::WeightInfo;122123 #[pallet::error]124 pub enum Error<T> {125 /// Tried to set data for fungible item.126 FungibleItemsDontHaveData,127 /// Fungible token does not support nesting.128 FungibleDisallowsNesting,129 /// Setting item properties is not allowed.130 SettingPropertiesNotAllowed,131 /// Setting allowance for all is not allowed.132 SettingAllowanceForAllNotAllowed,133 /// Only a fungible collection could be possibly broken; any fungible token is valid.134 FungibleTokensAreAlwaysValid,135 }136137 #[pallet::config]138 pub trait Config:139 frame_system::Config + pallet_common::Config + pallet_structure::Config + pallet_evm::Config140 {141 type WeightInfo: WeightInfo;142 }143144 #[pallet::pallet]145 pub struct Pallet<T>(_);146147 /// Total amount of fungible tokens inside a collection.148 #[pallet::storage]149 pub type TotalSupply<T: Config> =150 StorageMap<Hasher = Twox64Concat, Key = CollectionId, Value = u128, QueryKind = ValueQuery>;151152 /// Amount of tokens owned by an account inside a collection.153 #[pallet::storage]154 pub type Balance<T: Config> = StorageNMap<155 Key = (156 Key<Twox64Concat, CollectionId>,157 Key<Blake2_128Concat, T::CrossAccountId>,158 ),159 Value = u128,160 QueryKind = ValueQuery,161 >;162163 /// Storage for assets delegated to a limited extent to other users.164 #[pallet::storage]165 pub type Allowance<T: Config> = StorageNMap<166 Key = (167 Key<Twox64Concat, CollectionId>,168 Key<Blake2_128, T::CrossAccountId>, // Owner169 Key<Blake2_128Concat, T::CrossAccountId>, // Spender170 ),171 Value = u128,172 QueryKind = ValueQuery,173 >;174}175176/// Wrapper around untyped collection handle, asserting inner collection is of fungible type.177/// Required for interaction with Fungible collections, type safety and implementation [`solidity_interface`][`evm_coder::solidity_interface`].178pub struct FungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);179180/// Implementation of methods required for dispatching during runtime.181impl<T: Config> FungibleHandle<T> {182 /// Casts [`CollectionHandle`][`pallet_common::CollectionHandle`] into [`FungibleHandle`].183 pub fn cast(inner: pallet_common::CollectionHandle<T>) -> Self {184 Self(inner)185 }186187 /// Casts [`FungibleHandle`] into [`CollectionHandle`][`pallet_common::CollectionHandle`].188 pub fn into_inner(self) -> pallet_common::CollectionHandle<T> {189 self.0190 }191 /// Returns a mutable reference to the internal [`CollectionHandle`][`pallet_common::CollectionHandle`].192 pub fn common_mut(&mut self) -> &mut pallet_common::CollectionHandle<T> {193 &mut self.0194 }195}196impl<T: Config> WithRecorder<T> for FungibleHandle<T> {197 fn recorder(&self) -> &pallet_evm_coder_substrate::SubstrateRecorder<T> {198 self.0.recorder()199 }200 fn into_recorder(self) -> pallet_evm_coder_substrate::SubstrateRecorder<T> {201 self.0.into_recorder()202 }203}204impl<T: Config> Deref for FungibleHandle<T> {205 type Target = pallet_common::CollectionHandle<T>;206207 fn deref(&self) -> &Self::Target {208 &self.0209 }210}211212/// Pallet implementation for fungible assets213impl<T: Config> Pallet<T> {214 /// Destroys a collection.215 pub fn destroy_collection(216 collection: FungibleHandle<T>,217 sender: &T::CrossAccountId,218 ) -> DispatchResult {219 let id = collection.id;220221 if Self::collection_has_tokens(id) {222 return Err(<CommonError<T>>::CantDestroyNotEmptyCollection.into());223 }224225 // =========226227 PalletCommon::destroy_collection(collection.0, sender)?;228229 <TotalSupply<T>>::remove(id);230 let _ = <Balance<T>>::clear_prefix((id,), u32::MAX, None);231 let _ = <Allowance<T>>::clear_prefix((id,), u32::MAX, None);232 Ok(())233 }234235 /// Add properties to the collection.236 pub fn set_collection_properties(237 collection: &FungibleHandle<T>,238 sender: &T::CrossAccountId,239 properties: Vec<Property>,240 ) -> DispatchResult {241 <PalletCommon<T>>::set_collection_properties(collection, sender, properties.into_iter())242 }243244 /// Delete properties of the collection, associated with the provided keys.245 pub fn delete_collection_properties(246 collection: &FungibleHandle<T>,247 sender: &T::CrossAccountId,248 property_keys: Vec<PropertyKey>,249 ) -> DispatchResult {250 <PalletCommon<T>>::delete_collection_properties(251 collection,252 sender,253 property_keys.into_iter(),254 )255 }256257 /// Checks if collection has tokens. Return `true` if it has.258 fn collection_has_tokens(collection_id: CollectionId) -> bool {259 <TotalSupply<T>>::get(collection_id) != 0260 }261262 /// Burns the specified amount of the token. If the token balance263 /// or total supply is less than the given value,264 /// it will return [DispatchError].265 pub fn burn(266 collection: &FungibleHandle<T>,267 owner: &T::CrossAccountId,268 amount: u128,269 ) -> DispatchResult {270 let total_supply = <TotalSupply<T>>::get(collection.id)271 .checked_sub(amount)272 .ok_or(<CommonError<T>>::TokenValueTooLow)?;273274 let balance = <Balance<T>>::get((collection.id, owner))275 .checked_sub(amount)276 .ok_or(<CommonError<T>>::TokenValueTooLow)?;277278 if collection.permissions.access() == AccessMode::AllowList {279 collection.check_allowlist(owner)?;280 }281282 // =========283284 if balance == 0 {285 <Balance<T>>::remove((collection.id, owner));286 <PalletStructure<T>>::unnest_if_nested(owner, collection.id, TokenId::default());287 } else {288 <Balance<T>>::insert((collection.id, owner), balance);289 }290 <TotalSupply<T>>::insert(collection.id, total_supply);291292 <PalletEvm<T>>::deposit_log(293 ERC20Events::Transfer {294 from: *owner.as_eth(),295 to: H160::default(),296 value: amount.into(),297 }298 .to_log(collection_id_to_address(collection.id)),299 );300 <PalletCommon<T>>::deposit_event(CommonEvent::ItemDestroyed(301 collection.id,302 TokenId::default(),303 owner.clone(),304 amount,305 ));306 Ok(())307 }308309 /// Transfers the specified amount of tokens. Will check that310 /// the transfer is allowed for the token.311 ///312 /// - `from`: Owner of tokens to transfer.313 /// - `to`: Recepient of transfered tokens.314 /// - `amount`: Amount of tokens to transfer.315 /// - `collection`: Collection that contains the token316 pub fn transfer(317 collection: &FungibleHandle<T>,318 from: &T::CrossAccountId,319 to: &T::CrossAccountId,320 amount: u128,321 nesting_budget: &dyn Budget,322 ) -> DispatchResultWithPostInfo {323 let depositor = from;324 Self::transfer_internal(collection, depositor, from, to, amount, nesting_budget)325 }326327 /// Transfers tokens from the `from` account to the `to` account.328 /// The `depositor` is the account who deposits the tokens.329 /// For instance, the nesting rules will be checked against the `depositor`'s permissions.330 fn transfer_internal(331 collection: &FungibleHandle<T>,332 depositor: &T::CrossAccountId,333 from: &T::CrossAccountId,334 to: &T::CrossAccountId,335 amount: u128,336 nesting_budget: &dyn Budget,337 ) -> DispatchResultWithPostInfo {338 ensure!(339 collection.limits.transfers_enabled(),340 <CommonError<T>>::TransferNotAllowed,341 );342343 let mut actual_weight = <SelfWeightOf<T>>::transfer_raw();344345 if collection.permissions.access() == AccessMode::AllowList {346 collection.check_allowlist(from)?;347 collection.check_allowlist(to)?;348 actual_weight += <PalletCommonWeightOf<T>>::check_accesslist() * 2;349 }350 <PalletCommon<T>>::ensure_correct_receiver(to)?;351 let balance_from = <Balance<T>>::get((collection.id, from))352 .checked_sub(amount)353 .ok_or(<CommonError<T>>::TokenValueTooLow)?;354 let balance_to = if from != to && amount != 0 {355 Some(356 <Balance<T>>::get((collection.id, to))357 .checked_add(amount)358 .ok_or(ArithmeticError::Overflow)?,359 )360 } else {361 None362 };363364 // =========365366 if let Some(balance_to) = balance_to {367 // from != to && amount != 0368369 <PalletStructure<T>>::nest_if_sent_to_token(370 depositor,371 to,372 collection.id,373 TokenId::default(),374 nesting_budget,375 )?;376377 if balance_from == 0 {378 <Balance<T>>::remove((collection.id, from));379 <PalletStructure<T>>::unnest_if_nested(from, collection.id, TokenId::default());380 } else {381 <Balance<T>>::insert((collection.id, from), balance_from);382 }383 <Balance<T>>::insert((collection.id, to), balance_to);384 }385386 <PalletEvm<T>>::deposit_log(387 ERC20Events::Transfer {388 from: *from.as_eth(),389 to: *to.as_eth(),390 value: amount.into(),391 }392 .to_log(collection_id_to_address(collection.id)),393 );394 <PalletCommon<T>>::deposit_event(CommonEvent::Transfer(395 collection.id,396 TokenId::default(),397 from.clone(),398 to.clone(),399 amount,400 ));401402 Ok(PostDispatchInfo {403 actual_weight: Some(actual_weight),404 pays_fee: Pays::Yes,405 })406 }407408 /// Minting tokens for multiple IDs.409 /// See [`create_item`][`Pallet::create_item`] for more details.410 pub fn create_multiple_items(411 collection: &FungibleHandle<T>,412 depositor: &T::CrossAccountId,413 data: BTreeMap<T::CrossAccountId, u128>,414 nesting_budget: &dyn Budget,415 ) -> DispatchResult {416 if !collection.is_owner_or_admin(depositor) {417 ensure!(418 collection.permissions.mint_mode(),419 <CommonError<T>>::PublicMintingNotAllowed420 );421 collection.check_allowlist(depositor)?;422423 for (owner, _) in data.iter() {424 collection.check_allowlist(owner)?;425 }426 }427428 let total_supply = data429 .values()430 .copied()431 .try_fold(<TotalSupply<T>>::get(collection.id), |acc, v| {432 acc.checked_add(v)433 })434 .ok_or(ArithmeticError::Overflow)?;435436 for (to, _) in data.iter() {437 <PalletStructure<T>>::check_nesting(438 depositor,439 to,440 collection.id,441 TokenId::default(),442 nesting_budget,443 )?;444 }445446 let updated_balances = data447 .into_iter()448 .map(|(user, amount)| {449 let updated_balance = <Balance<T>>::get((collection.id, &user))450 .checked_add(amount)451 .ok_or(ArithmeticError::Overflow)?;452 Ok((user, amount, updated_balance))453 })454 .collect::<Result<Vec<_>, DispatchError>>()?;455456 // =========457458 <TotalSupply<T>>::insert(collection.id, total_supply);459 for (user, amount, updated_balance) in updated_balances {460 <Balance<T>>::insert((collection.id, &user), updated_balance);461 <PalletStructure<T>>::nest_if_sent_to_token_unchecked(462 &user,463 collection.id,464 TokenId::default(),465 );466 <PalletEvm<T>>::deposit_log(467 ERC20Events::Transfer {468 from: H160::default(),469 to: *user.as_eth(),470 value: amount.into(),471 }472 .to_log(collection_id_to_address(collection.id)),473 );474 <PalletCommon<T>>::deposit_event(CommonEvent::ItemCreated(475 collection.id,476 TokenId::default(),477 user.clone(),478 amount,479 ));480 }481482 Ok(())483 }484485 fn set_allowance_unchecked(486 collection: &FungibleHandle<T>,487 owner: &T::CrossAccountId,488 spender: &T::CrossAccountId,489 amount: u128,490 ) {491 if amount == 0 {492 <Allowance<T>>::remove((collection.id, owner, spender));493 } else {494 <Allowance<T>>::insert((collection.id, owner, spender), amount);495 }496497 <PalletEvm<T>>::deposit_log(498 ERC20Events::Approval {499 owner: *owner.as_eth(),500 spender: *spender.as_eth(),501 value: amount.into(),502 }503 .to_log(collection_id_to_address(collection.id)),504 );505 <PalletCommon<T>>::deposit_event(CommonEvent::Approved(506 collection.id,507 TokenId(0),508 owner.clone(),509 spender.clone(),510 amount,511 ));512 }513514 /// Set allowance for the spender to `transfer` or `burn` owner's tokens.515 ///516 /// - `collection`: Collection that contains the token517 /// - `owner`: Owner of tokens that sets the allowance.518 /// - `spender`: Recipient of the allowance rights.519 /// - `amount`: Amount of tokens the spender is allowed to `transfer` or `burn`.520 pub fn set_allowance(521 collection: &FungibleHandle<T>,522 owner: &T::CrossAccountId,523 spender: &T::CrossAccountId,524 amount: u128,525 ) -> DispatchResult {526 if collection.permissions.access() == AccessMode::AllowList {527 collection.check_allowlist(owner)?;528 collection.check_allowlist(spender)?;529 }530531 if <Balance<T>>::get((collection.id, owner)) < amount {532 ensure!(533 collection.ignores_owned_amount(owner),534 <CommonError<T>>::CantApproveMoreThanOwned535 );536 }537538 // =========539540 Self::set_allowance_unchecked(collection, owner, spender, amount);541 Ok(())542 }543544 /// Set allowance for the spender to `transfer` or `burn` owner's tokens from eth mirror.545 ///546 /// - `collection`: Collection that contains the token547 /// - `sender`: Owner of tokens that sets the allowance.548 /// - `from`: Owner's eth mirror.549 /// - `to`: Recipient of the allowance rights.550 /// - `amount`: Amount of tokens the spender is allowed to `transfer` or `burn`.551 pub fn set_allowance_from(552 collection: &FungibleHandle<T>,553 sender: &T::CrossAccountId,554 from: &T::CrossAccountId,555 to: &T::CrossAccountId,556 amount: u128,557 ) -> DispatchResult {558 if collection.permissions.access() == AccessMode::AllowList {559 collection.check_allowlist(sender)?;560 collection.check_allowlist(from)?;561 collection.check_allowlist(to)?;562 }563564 ensure!(565 sender.conv_eq(from),566 <CommonError<T>>::AddressIsNotEthMirror567 );568569 if <Balance<T>>::get((collection.id, from)) < amount {570 ensure!(571 collection.limits.owner_can_transfer()572 && (collection.is_owner_or_admin(sender) || collection.is_owner_or_admin(from)),573 <CommonError<T>>::CantApproveMoreThanOwned574 );575 }576577 // =========578579 Self::set_allowance_unchecked(collection, from, to, amount);580 Ok(())581 }582583 /// Checks if a non-owner has (enough) allowance from the owner to perform operations on the tokens.584 /// Returns the expected remaining allowance - it should be set manually if the transaction proceeds.585 ///586 /// - `collection`: Collection that contains the token.587 /// - `spender`: CrossAccountId who has the allowance rights.588 /// - `from`: The owner of the tokens who sets the allowance.589 /// - `amount`: Amount of tokens by which the allowance sholud be reduced.590 fn check_allowed(591 collection: &FungibleHandle<T>,592 spender: &T::CrossAccountId,593 from: &T::CrossAccountId,594 amount: u128,595 nesting_budget: &dyn Budget,596 ) -> Result<Option<u128>, DispatchError> {597 if spender.conv_eq(from) {598 return Ok(None);599 }600 if collection.permissions.access() == AccessMode::AllowList {601 // `from`, `to` checked in [`transfer`]602 collection.check_allowlist(spender)?;603 }604605 if collection.ignores_token_restrictions(spender) {606 return Ok(Self::compute_allowance_decrease(607 collection, from, spender, amount,608 ));609 }610611 if let Some(source) = T::CrossTokenAddressMapping::address_to_token(from) {612 ensure!(613 <PalletStructure<T>>::check_indirectly_owned(614 spender.clone(),615 source.0,616 source.1,617 None,618 nesting_budget619 )?,620 <CommonError<T>>::ApprovedValueTooLow,621 );622 return Ok(None);623 }624625 let allowance = Self::compute_allowance_decrease(collection, from, spender, amount);626 ensure!(allowance.is_some(), <CommonError<T>>::ApprovedValueTooLow);627628 Ok(allowance)629 }630631 /// Returns `Some(amount)` if the `spender` have allowance to spend this amount.632 /// Otherwise, it returns `None`.633 fn compute_allowance_decrease(634 collection: &FungibleHandle<T>,635 from: &T::CrossAccountId,636 spender: &T::CrossAccountId,637 amount: u128,638 ) -> Option<u128> {639 <Allowance<T>>::get((collection.id, from, spender)).checked_sub(amount)640 }641642 /// Transfer fungible tokens from one account to another.643 /// Same as the [`transfer`][`Pallet::transfer`] but spender doesn't needs to be an owner of the token pieces.644 /// The owner should set allowance for the spender to transfer pieces.645 /// See [`set_allowance`][`Pallet::set_allowance`] for more details.646 pub fn transfer_from(647 collection: &FungibleHandle<T>,648 spender: &T::CrossAccountId,649 from: &T::CrossAccountId,650 to: &T::CrossAccountId,651 amount: u128,652 nesting_budget: &dyn Budget,653 ) -> DispatchResultWithPostInfo {654 let allowance = Self::check_allowed(collection, spender, from, amount, nesting_budget)?;655656 // =========657658 let mut result =659 Self::transfer_internal(collection, spender, from, to, amount, nesting_budget);660 add_weight_to_post_info(&mut result, <SelfWeightOf<T>>::check_allowed_raw());661 result?;662663 if let Some(allowance) = allowance {664 Self::set_allowance_unchecked(collection, from, spender, allowance);665 add_weight_to_post_info(666 &mut result,667 <SelfWeightOf<T>>::set_allowance_unchecked_raw(),668 )669 }670 result671 }672673 /// Burn fungible tokens from the account.674 ///675 /// Same as the [`burn`][`Pallet::burn`] but spender doesn't need to be an owner of the tokens. The `from` should676 /// set allowance for the spender to burn tokens.677 /// See [`set_allowance`][`Pallet::set_allowance`] for more details.678 pub fn burn_from(679 collection: &FungibleHandle<T>,680 spender: &T::CrossAccountId,681 from: &T::CrossAccountId,682 amount: u128,683 nesting_budget: &dyn Budget,684 ) -> DispatchResult {685 let allowance = Self::check_allowed(collection, spender, from, amount, nesting_budget)?;686687 // =========688689 Self::burn(collection, from, amount)?;690 if let Some(allowance) = allowance {691 Self::set_allowance_unchecked(collection, from, spender, allowance);692 }693 Ok(())694 }695696 /// Creates fungible token.697 ///698 /// The sender should be the owner/admin of the collection or collection should be configured699 /// to allow public minting.700 ///701 /// - `data`: Contains user who will become the owners of the tokens and amount702 /// of tokens he will receive.703 pub fn create_item(704 collection: &FungibleHandle<T>,705 sender: &T::CrossAccountId,706 data: CreateItemData<T>,707 nesting_budget: &dyn Budget,708 ) -> DispatchResult {709 Self::create_multiple_items(710 collection,711 sender,712 [(data.0, data.1)].into_iter().collect(),713 nesting_budget,714 )715 }716717 /// Returns 10 tokens owners in no particular order718 ///719 /// There is no direct way to get token holders in ascending order,720 /// since `iter_prefix` returns values in no particular order.721 /// Therefore, getting the 10 largest holders with a large value of holders722 /// can lead to impact memory allocation + sorting with `n * log (n)`.723 pub fn token_owners(724 collection: CollectionId,725 _token: TokenId,726 ) -> Option<Vec<T::CrossAccountId>> {727 let res: Vec<T::CrossAccountId> = <Balance<T>>::iter_prefix((collection,))728 .map(|(owner, _amount)| owner)729 .take(10)730 .collect();731732 if res.is_empty() {733 None734 } else {735 Some(res)736 }737 }738}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//! # Fungible Pallet18//!19//! The Fungible pallet provides functionality for dealing with fungible assets.20//!21//! - [`CreateItemData`]22//! - [`Config`]23//! - [`FungibleHandle`]24//! - [`Pallet`]25//! - [`TotalSupply`]26//! - [`Balance`]27//! - [`Allowance`]28//! - [`Error`]29//!30//! ## Fungible tokens31//!32//! Fungible tokens or assets are divisible and non-unique. For instance,33//! fiat currencies like the dollar are fungible: A $1 bill34//! in New York City has the same value as a $1 bill in Miami.35//! A fungible token can also be a cryptocurrency like Bitcoin: 1 BTC is worth 1 BTC,36//! no matter where it is issued. Thus, the fungibility refers to a specific currency’s37//! ability to maintain one standard value. As well, it needs to have uniform acceptance.38//! This means that a currency’s history should not be able to affect its value,39//! and this is due to the fact that each piece that is a part of the currency is equal40//! in value when compared to every other piece of that exact same currency.41//! In the world of cryptocurrencies, this is essentially a coin or a token42//! that can be replaced by another identical coin or token, and they are43//! both mutually interchangeable. A popular implementation of fungible tokens is44//! the ERC-20 token standard.45//!46//! ### ERC-2047//!48//! The [ERC-20](https://ethereum.org/en/developers/docs/standards/tokens/erc-20/) (Ethereum Request for Comments 20), proposed by Fabian Vogelsteller in November 2015,49//! is a Token Standard that implements an API for tokens within Smart Contracts.50//!51//! Example functionalities ERC-20 provides:52//!53//! * transfer tokens from one account to another54//! * get the current token balance of an account55//! * get the total supply of the token available on the network56//! * approve whether an amount of token from an account can be spent by a third-party account57//!58//! ## Overview59//!60//! The module provides functionality for asset management of fungible asset, supports ERC-20 standart, includes:61//!62//! * Asset Issuance63//! * Asset Transferal64//! * Asset Destruction65//! * Delegated Asset Transfers66//!67//! **NOTE:** The created fungible asset always has `token_id` = 0.68//! So `tokenA` and `tokenB` will have different `collection_id`.69//!70//! ### Implementations71//!72//! The Fungible pallet provides implementations for the following traits.73//!74//! - [`WithRecorder`](pallet_evm_coder_substrate::WithRecorder): Trait for EVM support75//! - [`CommonCollectionOperations`](pallet_common::CommonCollectionOperations): Functions for dealing with collections76//! - [`CommonWeightInfo`](pallet_common::CommonWeightInfo): Functions for retrieval of transaction weight77//! - [`CommonEvmHandler`](pallet_common::erc::CommonEvmHandler): Function for handling EVM runtime calls7879#![cfg_attr(not(feature = "std"), no_std)]8081use core::ops::Deref;8283use evm_coder::ToLog;84use frame_support::{dispatch::PostDispatchInfo, ensure, pallet_prelude::*};85pub use pallet::*;86use pallet_common::{87 eth::collection_id_to_address, helpers::add_weight_to_post_info,88 weights::WeightInfo as CommonWeightInfo, Error as CommonError, Event as CommonEvent,89 Pallet as PalletCommon, SelfWeightOf as PalletCommonWeightOf,90};91use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm};92use pallet_evm_coder_substrate::WithRecorder;93use pallet_structure::Pallet as PalletStructure;94use sp_core::H160;95use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};96use sp_std::{collections::btree_map::BTreeMap, vec::Vec};97use up_data_structs::{98 budget::Budget, mapping::TokenAddressMapping, AccessMode, CollectionId, Property, PropertyKey,99 TokenId,100};101use weights::WeightInfo;102103use crate::erc::ERC20Events;104#[cfg(feature = "runtime-benchmarks")]105pub mod benchmarking;106pub mod common;107pub mod erc;108pub mod weights;109110pub type CreateItemData<T> = (<T as pallet_evm::Config>::CrossAccountId, u128);111pub(crate) type SelfWeightOf<T> = <T as Config>::WeightInfo;112113#[frame_support::pallet]114pub mod pallet {115 use frame_support::{116 pallet_prelude::*, storage::Key, Blake2_128, Blake2_128Concat, Twox64Concat,117 };118 use up_data_structs::CollectionId;119120 use super::weights::WeightInfo;121122 #[pallet::error]123 pub enum Error<T> {124 /// Tried to set data for fungible item.125 FungibleItemsDontHaveData,126 /// Fungible token does not support nesting.127 FungibleDisallowsNesting,128 /// Setting item properties is not allowed.129 SettingPropertiesNotAllowed,130 /// Setting allowance for all is not allowed.131 SettingAllowanceForAllNotAllowed,132 /// Only a fungible collection could be possibly broken; any fungible token is valid.133 FungibleTokensAreAlwaysValid,134 }135136 #[pallet::config]137 pub trait Config:138 frame_system::Config + pallet_common::Config + pallet_structure::Config + pallet_evm::Config139 {140 type WeightInfo: WeightInfo;141 }142143 #[pallet::pallet]144 pub struct Pallet<T>(_);145146 /// Total amount of fungible tokens inside a collection.147 #[pallet::storage]148 pub type TotalSupply<T: Config> =149 StorageMap<Hasher = Twox64Concat, Key = CollectionId, Value = u128, QueryKind = ValueQuery>;150151 /// Amount of tokens owned by an account inside a collection.152 #[pallet::storage]153 pub type Balance<T: Config> = StorageNMap<154 Key = (155 Key<Twox64Concat, CollectionId>,156 Key<Blake2_128Concat, T::CrossAccountId>,157 ),158 Value = u128,159 QueryKind = ValueQuery,160 >;161162 /// Storage for assets delegated to a limited extent to other users.163 #[pallet::storage]164 pub type Allowance<T: Config> = StorageNMap<165 Key = (166 Key<Twox64Concat, CollectionId>,167 Key<Blake2_128, T::CrossAccountId>, // Owner168 Key<Blake2_128Concat, T::CrossAccountId>, // Spender169 ),170 Value = u128,171 QueryKind = ValueQuery,172 >;173}174175/// Wrapper around untyped collection handle, asserting inner collection is of fungible type.176/// Required for interaction with Fungible collections, type safety and implementation [`solidity_interface`][`evm_coder::solidity_interface`].177pub struct FungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);178179/// Implementation of methods required for dispatching during runtime.180impl<T: Config> FungibleHandle<T> {181 /// Casts [`CollectionHandle`][`pallet_common::CollectionHandle`] into [`FungibleHandle`].182 pub fn cast(inner: pallet_common::CollectionHandle<T>) -> Self {183 Self(inner)184 }185186 /// Casts [`FungibleHandle`] into [`CollectionHandle`][`pallet_common::CollectionHandle`].187 pub fn into_inner(self) -> pallet_common::CollectionHandle<T> {188 self.0189 }190 /// Returns a mutable reference to the internal [`CollectionHandle`][`pallet_common::CollectionHandle`].191 pub fn common_mut(&mut self) -> &mut pallet_common::CollectionHandle<T> {192 &mut self.0193 }194}195impl<T: Config> WithRecorder<T> for FungibleHandle<T> {196 fn recorder(&self) -> &pallet_evm_coder_substrate::SubstrateRecorder<T> {197 self.0.recorder()198 }199 fn into_recorder(self) -> pallet_evm_coder_substrate::SubstrateRecorder<T> {200 self.0.into_recorder()201 }202}203impl<T: Config> Deref for FungibleHandle<T> {204 type Target = pallet_common::CollectionHandle<T>;205206 fn deref(&self) -> &Self::Target {207 &self.0208 }209}210211/// Pallet implementation for fungible assets212impl<T: Config> Pallet<T> {213 /// Destroys a collection.214 pub fn destroy_collection(215 collection: FungibleHandle<T>,216 sender: &T::CrossAccountId,217 ) -> DispatchResult {218 let id = collection.id;219220 if Self::collection_has_tokens(id) {221 return Err(<CommonError<T>>::CantDestroyNotEmptyCollection.into());222 }223224 // =========225226 PalletCommon::destroy_collection(collection.0, sender)?;227228 <TotalSupply<T>>::remove(id);229 let _ = <Balance<T>>::clear_prefix((id,), u32::MAX, None);230 let _ = <Allowance<T>>::clear_prefix((id,), u32::MAX, None);231 Ok(())232 }233234 /// Add properties to the collection.235 pub fn set_collection_properties(236 collection: &FungibleHandle<T>,237 sender: &T::CrossAccountId,238 properties: Vec<Property>,239 ) -> DispatchResult {240 <PalletCommon<T>>::set_collection_properties(collection, sender, properties.into_iter())241 }242243 /// Delete properties of the collection, associated with the provided keys.244 pub fn delete_collection_properties(245 collection: &FungibleHandle<T>,246 sender: &T::CrossAccountId,247 property_keys: Vec<PropertyKey>,248 ) -> DispatchResult {249 <PalletCommon<T>>::delete_collection_properties(250 collection,251 sender,252 property_keys.into_iter(),253 )254 }255256 /// Checks if collection has tokens. Return `true` if it has.257 fn collection_has_tokens(collection_id: CollectionId) -> bool {258 <TotalSupply<T>>::get(collection_id) != 0259 }260261 /// Burns the specified amount of the token. If the token balance262 /// or total supply is less than the given value,263 /// it will return [DispatchError].264 pub fn burn(265 collection: &FungibleHandle<T>,266 owner: &T::CrossAccountId,267 amount: u128,268 ) -> DispatchResult {269 let total_supply = <TotalSupply<T>>::get(collection.id)270 .checked_sub(amount)271 .ok_or(<CommonError<T>>::TokenValueTooLow)?;272273 let balance = <Balance<T>>::get((collection.id, owner))274 .checked_sub(amount)275 .ok_or(<CommonError<T>>::TokenValueTooLow)?;276277 if collection.permissions.access() == AccessMode::AllowList {278 collection.check_allowlist(owner)?;279 }280281 // =========282283 if balance == 0 {284 <Balance<T>>::remove((collection.id, owner));285 <PalletStructure<T>>::unnest_if_nested(owner, collection.id, TokenId::default());286 } else {287 <Balance<T>>::insert((collection.id, owner), balance);288 }289 <TotalSupply<T>>::insert(collection.id, total_supply);290291 <PalletEvm<T>>::deposit_log(292 ERC20Events::Transfer {293 from: *owner.as_eth(),294 to: H160::default(),295 value: amount.into(),296 }297 .to_log(collection_id_to_address(collection.id)),298 );299 <PalletCommon<T>>::deposit_event(CommonEvent::ItemDestroyed(300 collection.id,301 TokenId::default(),302 owner.clone(),303 amount,304 ));305 Ok(())306 }307308 /// Transfers the specified amount of tokens. Will check that309 /// the transfer is allowed for the token.310 ///311 /// - `from`: Owner of tokens to transfer.312 /// - `to`: Recepient of transfered tokens.313 /// - `amount`: Amount of tokens to transfer.314 /// - `collection`: Collection that contains the token315 pub fn transfer(316 collection: &FungibleHandle<T>,317 from: &T::CrossAccountId,318 to: &T::CrossAccountId,319 amount: u128,320 nesting_budget: &dyn Budget,321 ) -> DispatchResultWithPostInfo {322 let depositor = from;323 Self::transfer_internal(collection, depositor, from, to, amount, nesting_budget)324 }325326 /// Transfers tokens from the `from` account to the `to` account.327 /// The `depositor` is the account who deposits the tokens.328 /// For instance, the nesting rules will be checked against the `depositor`'s permissions.329 fn transfer_internal(330 collection: &FungibleHandle<T>,331 depositor: &T::CrossAccountId,332 from: &T::CrossAccountId,333 to: &T::CrossAccountId,334 amount: u128,335 nesting_budget: &dyn Budget,336 ) -> DispatchResultWithPostInfo {337 ensure!(338 collection.limits.transfers_enabled(),339 <CommonError<T>>::TransferNotAllowed,340 );341342 let mut actual_weight = <SelfWeightOf<T>>::transfer_raw();343344 if collection.permissions.access() == AccessMode::AllowList {345 collection.check_allowlist(from)?;346 collection.check_allowlist(to)?;347 actual_weight += <PalletCommonWeightOf<T>>::check_accesslist() * 2;348 }349 <PalletCommon<T>>::ensure_correct_receiver(to)?;350 let balance_from = <Balance<T>>::get((collection.id, from))351 .checked_sub(amount)352 .ok_or(<CommonError<T>>::TokenValueTooLow)?;353 let balance_to = if from != to && amount != 0 {354 Some(355 <Balance<T>>::get((collection.id, to))356 .checked_add(amount)357 .ok_or(ArithmeticError::Overflow)?,358 )359 } else {360 None361 };362363 // =========364365 if let Some(balance_to) = balance_to {366 // from != to && amount != 0367368 <PalletStructure<T>>::nest_if_sent_to_token(369 depositor,370 to,371 collection.id,372 TokenId::default(),373 nesting_budget,374 )?;375376 if balance_from == 0 {377 <Balance<T>>::remove((collection.id, from));378 <PalletStructure<T>>::unnest_if_nested(from, collection.id, TokenId::default());379 } else {380 <Balance<T>>::insert((collection.id, from), balance_from);381 }382 <Balance<T>>::insert((collection.id, to), balance_to);383 }384385 <PalletEvm<T>>::deposit_log(386 ERC20Events::Transfer {387 from: *from.as_eth(),388 to: *to.as_eth(),389 value: amount.into(),390 }391 .to_log(collection_id_to_address(collection.id)),392 );393 <PalletCommon<T>>::deposit_event(CommonEvent::Transfer(394 collection.id,395 TokenId::default(),396 from.clone(),397 to.clone(),398 amount,399 ));400401 Ok(PostDispatchInfo {402 actual_weight: Some(actual_weight),403 pays_fee: Pays::Yes,404 })405 }406407 /// Minting tokens for multiple IDs.408 /// See [`create_item`][`Pallet::create_item`] for more details.409 pub fn create_multiple_items(410 collection: &FungibleHandle<T>,411 depositor: &T::CrossAccountId,412 data: BTreeMap<T::CrossAccountId, u128>,413 nesting_budget: &dyn Budget,414 ) -> DispatchResult {415 if !collection.is_owner_or_admin(depositor) {416 ensure!(417 collection.permissions.mint_mode(),418 <CommonError<T>>::PublicMintingNotAllowed419 );420 collection.check_allowlist(depositor)?;421422 for (owner, _) in data.iter() {423 collection.check_allowlist(owner)?;424 }425 }426427 let total_supply = data428 .values()429 .copied()430 .try_fold(<TotalSupply<T>>::get(collection.id), |acc, v| {431 acc.checked_add(v)432 })433 .ok_or(ArithmeticError::Overflow)?;434435 for (to, _) in data.iter() {436 <PalletStructure<T>>::check_nesting(437 depositor,438 to,439 collection.id,440 TokenId::default(),441 nesting_budget,442 )?;443 }444445 let updated_balances = data446 .into_iter()447 .map(|(user, amount)| {448 let updated_balance = <Balance<T>>::get((collection.id, &user))449 .checked_add(amount)450 .ok_or(ArithmeticError::Overflow)?;451 Ok((user, amount, updated_balance))452 })453 .collect::<Result<Vec<_>, DispatchError>>()?;454455 // =========456457 <TotalSupply<T>>::insert(collection.id, total_supply);458 for (user, amount, updated_balance) in updated_balances {459 <Balance<T>>::insert((collection.id, &user), updated_balance);460 <PalletStructure<T>>::nest_if_sent_to_token_unchecked(461 &user,462 collection.id,463 TokenId::default(),464 );465 <PalletEvm<T>>::deposit_log(466 ERC20Events::Transfer {467 from: H160::default(),468 to: *user.as_eth(),469 value: amount.into(),470 }471 .to_log(collection_id_to_address(collection.id)),472 );473 <PalletCommon<T>>::deposit_event(CommonEvent::ItemCreated(474 collection.id,475 TokenId::default(),476 user.clone(),477 amount,478 ));479 }480481 Ok(())482 }483484 fn set_allowance_unchecked(485 collection: &FungibleHandle<T>,486 owner: &T::CrossAccountId,487 spender: &T::CrossAccountId,488 amount: u128,489 ) {490 if amount == 0 {491 <Allowance<T>>::remove((collection.id, owner, spender));492 } else {493 <Allowance<T>>::insert((collection.id, owner, spender), amount);494 }495496 <PalletEvm<T>>::deposit_log(497 ERC20Events::Approval {498 owner: *owner.as_eth(),499 spender: *spender.as_eth(),500 value: amount.into(),501 }502 .to_log(collection_id_to_address(collection.id)),503 );504 <PalletCommon<T>>::deposit_event(CommonEvent::Approved(505 collection.id,506 TokenId(0),507 owner.clone(),508 spender.clone(),509 amount,510 ));511 }512513 /// Set allowance for the spender to `transfer` or `burn` owner's tokens.514 ///515 /// - `collection`: Collection that contains the token516 /// - `owner`: Owner of tokens that sets the allowance.517 /// - `spender`: Recipient of the allowance rights.518 /// - `amount`: Amount of tokens the spender is allowed to `transfer` or `burn`.519 pub fn set_allowance(520 collection: &FungibleHandle<T>,521 owner: &T::CrossAccountId,522 spender: &T::CrossAccountId,523 amount: u128,524 ) -> DispatchResult {525 if collection.permissions.access() == AccessMode::AllowList {526 collection.check_allowlist(owner)?;527 collection.check_allowlist(spender)?;528 }529530 if <Balance<T>>::get((collection.id, owner)) < amount {531 ensure!(532 collection.ignores_owned_amount(owner),533 <CommonError<T>>::CantApproveMoreThanOwned534 );535 }536537 // =========538539 Self::set_allowance_unchecked(collection, owner, spender, amount);540 Ok(())541 }542543 /// Set allowance for the spender to `transfer` or `burn` owner's tokens from eth mirror.544 ///545 /// - `collection`: Collection that contains the token546 /// - `sender`: Owner of tokens that sets the allowance.547 /// - `from`: Owner's eth mirror.548 /// - `to`: Recipient of the allowance rights.549 /// - `amount`: Amount of tokens the spender is allowed to `transfer` or `burn`.550 pub fn set_allowance_from(551 collection: &FungibleHandle<T>,552 sender: &T::CrossAccountId,553 from: &T::CrossAccountId,554 to: &T::CrossAccountId,555 amount: u128,556 ) -> DispatchResult {557 if collection.permissions.access() == AccessMode::AllowList {558 collection.check_allowlist(sender)?;559 collection.check_allowlist(from)?;560 collection.check_allowlist(to)?;561 }562563 ensure!(564 sender.conv_eq(from),565 <CommonError<T>>::AddressIsNotEthMirror566 );567568 if <Balance<T>>::get((collection.id, from)) < amount {569 ensure!(570 collection.limits.owner_can_transfer()571 && (collection.is_owner_or_admin(sender) || collection.is_owner_or_admin(from)),572 <CommonError<T>>::CantApproveMoreThanOwned573 );574 }575576 // =========577578 Self::set_allowance_unchecked(collection, from, to, amount);579 Ok(())580 }581582 /// Checks if a non-owner has (enough) allowance from the owner to perform operations on the tokens.583 /// Returns the expected remaining allowance - it should be set manually if the transaction proceeds.584 ///585 /// - `collection`: Collection that contains the token.586 /// - `spender`: CrossAccountId who has the allowance rights.587 /// - `from`: The owner of the tokens who sets the allowance.588 /// - `amount`: Amount of tokens by which the allowance sholud be reduced.589 fn check_allowed(590 collection: &FungibleHandle<T>,591 spender: &T::CrossAccountId,592 from: &T::CrossAccountId,593 amount: u128,594 nesting_budget: &dyn Budget,595 ) -> Result<Option<u128>, DispatchError> {596 if spender.conv_eq(from) {597 return Ok(None);598 }599 if collection.permissions.access() == AccessMode::AllowList {600 // `from`, `to` checked in [`transfer`]601 collection.check_allowlist(spender)?;602 }603604 if collection.ignores_token_restrictions(spender) {605 return Ok(Self::compute_allowance_decrease(606 collection, from, spender, amount,607 ));608 }609610 if let Some(source) = T::CrossTokenAddressMapping::address_to_token(from) {611 ensure!(612 <PalletStructure<T>>::check_indirectly_owned(613 spender.clone(),614 source.0,615 source.1,616 None,617 nesting_budget618 )?,619 <CommonError<T>>::ApprovedValueTooLow,620 );621 return Ok(None);622 }623624 let allowance = Self::compute_allowance_decrease(collection, from, spender, amount);625 ensure!(allowance.is_some(), <CommonError<T>>::ApprovedValueTooLow);626627 Ok(allowance)628 }629630 /// Returns `Some(amount)` if the `spender` have allowance to spend this amount.631 /// Otherwise, it returns `None`.632 fn compute_allowance_decrease(633 collection: &FungibleHandle<T>,634 from: &T::CrossAccountId,635 spender: &T::CrossAccountId,636 amount: u128,637 ) -> Option<u128> {638 <Allowance<T>>::get((collection.id, from, spender)).checked_sub(amount)639 }640641 /// Transfer fungible tokens from one account to another.642 /// Same as the [`transfer`][`Pallet::transfer`] but spender doesn't needs to be an owner of the token pieces.643 /// The owner should set allowance for the spender to transfer pieces.644 /// See [`set_allowance`][`Pallet::set_allowance`] for more details.645 pub fn transfer_from(646 collection: &FungibleHandle<T>,647 spender: &T::CrossAccountId,648 from: &T::CrossAccountId,649 to: &T::CrossAccountId,650 amount: u128,651 nesting_budget: &dyn Budget,652 ) -> DispatchResultWithPostInfo {653 let allowance = Self::check_allowed(collection, spender, from, amount, nesting_budget)?;654655 // =========656657 let mut result =658 Self::transfer_internal(collection, spender, from, to, amount, nesting_budget);659 add_weight_to_post_info(&mut result, <SelfWeightOf<T>>::check_allowed_raw());660 result?;661662 if let Some(allowance) = allowance {663 Self::set_allowance_unchecked(collection, from, spender, allowance);664 add_weight_to_post_info(665 &mut result,666 <SelfWeightOf<T>>::set_allowance_unchecked_raw(),667 )668 }669 result670 }671672 /// Burn fungible tokens from the account.673 ///674 /// Same as the [`burn`][`Pallet::burn`] but spender doesn't need to be an owner of the tokens. The `from` should675 /// set allowance for the spender to burn tokens.676 /// See [`set_allowance`][`Pallet::set_allowance`] for more details.677 pub fn burn_from(678 collection: &FungibleHandle<T>,679 spender: &T::CrossAccountId,680 from: &T::CrossAccountId,681 amount: u128,682 nesting_budget: &dyn Budget,683 ) -> DispatchResult {684 let allowance = Self::check_allowed(collection, spender, from, amount, nesting_budget)?;685686 // =========687688 Self::burn(collection, from, amount)?;689 if let Some(allowance) = allowance {690 Self::set_allowance_unchecked(collection, from, spender, allowance);691 }692 Ok(())693 }694695 /// Creates fungible token.696 ///697 /// The sender should be the owner/admin of the collection or collection should be configured698 /// to allow public minting.699 ///700 /// - `data`: Contains user who will become the owners of the tokens and amount701 /// of tokens he will receive.702 pub fn create_item(703 collection: &FungibleHandle<T>,704 sender: &T::CrossAccountId,705 data: CreateItemData<T>,706 nesting_budget: &dyn Budget,707 ) -> DispatchResult {708 Self::create_multiple_items(709 collection,710 sender,711 [(data.0, data.1)].into_iter().collect(),712 nesting_budget,713 )714 }715716 /// Returns 10 tokens owners in no particular order717 ///718 /// There is no direct way to get token holders in ascending order,719 /// since `iter_prefix` returns values in no particular order.720 /// Therefore, getting the 10 largest holders with a large value of holders721 /// can lead to impact memory allocation + sorting with `n * log (n)`.722 pub fn token_owners(723 collection: CollectionId,724 _token: TokenId,725 ) -> Option<Vec<T::CrossAccountId>> {726 let res: Vec<T::CrossAccountId> = <Balance<T>>::iter_prefix((collection,))727 .map(|(owner, _amount)| owner)728 .take(10)729 .collect();730731 if res.is_empty() {732 None733 } else {734 Some(res)735 }736 }737}pallets/nonfungible/src/common.rsdiffbeforeafterboth--- a/pallets/nonfungible/src/common.rs
+++ b/pallets/nonfungible/src/common.rs
@@ -576,6 +576,10 @@
self.flags.foreign
}
+ fn token_has_children(&self, token: TokenId) -> bool {
+ <Pallet<T>>::token_has_children(self.id, token)
+ }
+
fn create_item_internal(
&self,
depositor: &<T>::CrossAccountId,
pallets/nonfungible/src/lib.rsdiffbeforeafterboth--- a/pallets/nonfungible/src/lib.rs
+++ b/pallets/nonfungible/src/lib.rs
@@ -117,8 +117,8 @@
use sp_std::{collections::btree_map::BTreeMap, vec, vec::Vec};
use up_data_structs::{
budget::Budget, mapping::TokenAddressMapping, AccessMode, AuxPropertyValue, CollectionId,
- CreateCollectionData, CreateNftExData, CustomDataLimit, PropertiesPermissionMap, Property,
- PropertyKey, PropertyKeyPermission, PropertyScope, PropertyValue, TokenChild, TokenId,
+ CreateNftExData, CustomDataLimit, PropertiesPermissionMap, Property, PropertyKey,
+ PropertyKeyPermission, PropertyScope, PropertyValue, TokenChild, TokenId,
TokenProperties as TokenPropertiesT,
};
use weights::WeightInfo;