1#![cfg_attr(not(feature = "std"), no_std)]23456use codec::{Decode, Encode};7use frame_support::{decl_event, decl_module, decl_storage, dispatch::DispatchResult, ensure};8use frame_system::{self as system, ensure_signed};9use sp_runtime::sp_std::prelude::Vec;1011#[cfg(test)]12mod mock;1314#[cfg(test)]15mod tests;1617#[derive(Encode, Decode, Debug, Clone, PartialEq)]18pub enum AccessMode {19 Normal,20 WhiteList,21}22impl Default for AccessMode { fn default() -> Self { Self::Normal } }2324#[derive(Encode, Decode, Debug, Eq, Clone, PartialEq)]25pub enum CollectionMode {26 Invalid,27 NFT,28 Fungible,29 ReFungible,30}31impl Default for CollectionMode { fn default() -> Self { Self::Invalid } }3233#[derive(Encode, Decode, Default, Clone, PartialEq)]34#[cfg_attr(feature = "std", derive(Debug))]35pub struct Ownership<AccountId> {36 pub owner: AccountId,37 pub fraction: u12838}3940#[derive(Encode, Decode, Default, Clone, PartialEq)]41#[cfg_attr(feature = "std", derive(Debug))]42pub struct CollectionType<AccountId> {43 pub owner: AccountId,44 pub mode: CollectionMode,45 pub access: AccessMode,46 pub next_item_id: u64,47 pub decimal_points: u32,48 pub name: Vec<u16>, 49 pub description: Vec<u16>, 50 pub token_prefix: Vec<u8>, 51 pub custom_data_size: u32,52}5354#[derive(Encode, Decode, Default, Clone, PartialEq)]55#[cfg_attr(feature = "std", derive(Debug))]56pub struct CollectionAdminsType<AccountId> {57 pub admin: AccountId,58 pub collection_id: u64,59}6061#[derive(Encode, Decode, Default, Clone, PartialEq)]62#[cfg_attr(feature = "std", derive(Debug))]63pub struct NftItemType<AccountId> {64 pub collection: u64,65 pub owner: AccountId,66 pub data: Vec<u8>,67}6869#[derive(Encode, Decode, Default, Clone, PartialEq)]70#[cfg_attr(feature = "std", derive(Debug))]71pub struct FungibleItemType<AccountId> {72 pub collection: u64,73 pub owner: Vec<AccountId>,74 pub data: Vec<u64>,75}7677#[derive(Encode, Decode, Default, Clone, PartialEq)]78#[cfg_attr(feature = "std", derive(Debug))]79pub struct ReFungibleItemType<AccountId> {80 pub collection: u64,81 pub owner: Vec<Ownership<AccountId>>,82}8384pub trait Trait: system::Trait {85 type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;86}8788decl_storage! {89 trait Store for Module<T: Trait> as Nft {9091 92 NextCollectionID get(fn next_collection_id): u64;93 pub Collection get(fn collection): map hasher(identity) u64 => CollectionType<T::AccountId>;94 pub AdminList get(fn admin_list_collection): map hasher(identity) u64 => Vec<T::AccountId>;9596 97 pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) T::AccountId => u64;98 pub ApprovedList get(fn approved): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => Vec<T::AccountId>;99100 101 pub NftItemList get(fn nft_item_id): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => NftItemType<T::AccountId>;102 pub FungibleItemList get(fn fungible_item_id): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => FungibleItemType<T::AccountId>;103 pub ReFungibleItemList get(fn refungible_item_id): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => ReFungibleItemType<T::AccountId>;104 ItemListIndex get(fn item_index): map hasher(blake2_128_concat) u64 => u64;105106 pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) T::AccountId => Vec<u64>;107 }108}109110decl_event!(111 pub enum Event<T>112 where113 AccountId = <T as system::Trait>::AccountId,114 {115 Created(u64, u8, AccountId),116 ItemCreated(u64, u64),117 ItemDestroyed(u64, u64),118 }119);120121decl_module! {122 pub struct Module<T: Trait> for enum Call where origin: T::Origin {123124 fn deposit_event() = default;125126 127 128 129 130 #[weight = 0]131 pub fn create_collection( origin,132 collection_name: Vec<u16>,133 collection_description: Vec<u16>,134 token_prefix: Vec<u8>,135 mode: u8,136 decimal_points: u32,137 custom_data_size: u32) -> DispatchResult {138139 140 let who = ensure_signed(origin)?;141 let collection_mode: CollectionMode;142 match mode {143 1 => collection_mode = CollectionMode::NFT,144 2 => collection_mode = CollectionMode::Fungible,145 3 => collection_mode = CollectionMode::ReFungible,146 _ => collection_mode = CollectionMode::Invalid147 }148149 150 ensure!((collection_mode == CollectionMode::Fungible || collection_mode == CollectionMode::NFT || collection_mode == CollectionMode::ReFungible), 151 "Collection mode must be Fungible, NFT or ReFungible"); 152153 154 if collection_mode == CollectionMode::NFT155 {156 ensure!(decimal_points == 0, "Collection in NFT mode must have zero in decimal_points parameter"); 157 }158159 160 if collection_mode == CollectionMode::Fungible161 {162 ensure!(custom_data_size == 0, "Collection in Fungible mode must have zero in custom_data_size parameter"); 163 ensure!(decimal_points != 0, "Collection in Fungible mode must have not zero in decimal_points parameter"); 164 }165166 167 ensure!(decimal_points < 100, "decimal_points parameter must be lower than 100"); 168169 let mut name = collection_name.to_vec();170 name.push(0);171 ensure!(name.len() <= 64, "Collection name can not be longer than 63 char");172173 let mut description = collection_description.to_vec();174 description.push(0);175 ensure!(name.len() <= 256, "Collection description can not be longer than 255 char");176177 let mut prefix = token_prefix.to_vec();178 prefix.push(0);179 ensure!(prefix.len() <= 16, "Token prefix can not be longer than 15 char");180181 182 let next_id = NextCollectionID::get()183 .checked_add(1)184 .expect("collection id error");185186 NextCollectionID::put(next_id);187188 189 let new_collection = CollectionType {190 owner: who.clone(),191 name: name,192 mode: collection_mode.clone(),193 access: AccessMode::Normal,194 description: description,195 decimal_points: decimal_points,196 token_prefix: prefix,197 next_item_id: next_id,198 custom_data_size: custom_data_size,199 };200201 202 <Collection<T>>::insert(next_id, new_collection);203204 205 Self::deposit_event(RawEvent::Created(next_id, mode, who.clone()));206207 Ok(())208 }209210 #[weight = 0]211 pub fn destroy_collection(origin, collection_id: u64) -> DispatchResult {212213 let sender = ensure_signed(origin)?;214 Self::check_owner_permissions(collection_id, sender)?;215216 <AddressTokens<T>>::remove_prefix(collection_id);217 <ApprovedList<T>>::remove_prefix(collection_id);218 <Balance<T>>::remove_prefix(collection_id);219 <ItemListIndex>::remove(collection_id);220 <AdminList<T>>::remove(collection_id);221 <Collection<T>>::remove(collection_id);222223 Ok(())224 }225226 #[weight = 0]227 pub fn change_collection_owner(origin, collection_id: u64, new_owner: T::AccountId) -> DispatchResult {228229 let sender = ensure_signed(origin)?;230 Self::check_owner_permissions(collection_id, sender)?;231 let mut target_collection = <Collection<T>>::get(collection_id);232 target_collection.owner = new_owner;233 <Collection<T>>::insert(collection_id, target_collection);234235 Ok(())236 }237238 #[weight = 0]239 pub fn add_collection_admin(origin, collection_id: u64, new_admin_id: T::AccountId) -> DispatchResult {240241 let sender = ensure_signed(origin)?;242 Self::check_owner_or_admin_permissions(collection_id, sender)?;243 let mut admin_arr: Vec<T::AccountId> = Vec::new();244245 if <AdminList<T>>::contains_key(collection_id)246 {247 admin_arr = <AdminList<T>>::get(collection_id);248 ensure!(!admin_arr.contains(&new_admin_id), "Account already has admin role");249 }250251 admin_arr.push(new_admin_id);252 <AdminList<T>>::insert(collection_id, admin_arr);253254 Ok(())255 }256257 #[weight = 0]258 pub fn remove_collection_admin(origin, collection_id: u64, account_id: T::AccountId) -> DispatchResult {259260 let sender = ensure_signed(origin)?;261 Self::check_owner_or_admin_permissions(collection_id, sender)?;262263 if <AdminList<T>>::contains_key(collection_id)264 {265 let mut admin_arr = <AdminList<T>>::get(collection_id);266 admin_arr.retain(|i| *i != account_id);267 <AdminList<T>>::insert(collection_id, admin_arr);268 }269270 Ok(())271 }272273 #[weight = 0]274 pub fn create_item(origin, collection_id: u64, properties: Vec<u8>, owner: T::AccountId) -> DispatchResult {275276 let sender = ensure_signed(origin)?;277278 279 let target_collection = <Collection<T>>::get(collection_id);280 ensure!(target_collection.custom_data_size >= properties.len() as u32, "Size of item is too large");281282 Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;283284 let new_balance = <Balance<T>>::get(collection_id, owner.clone()) + 1;285 <Balance<T>>::insert(collection_id, owner.clone(), new_balance);286287 288 ensure!(target_collection.mode == CollectionMode::NFT, "Collection type not implemented");289290 if target_collection.mode == CollectionMode::NFT291 {292 293 let item = NftItemType {294 collection: collection_id,295 owner: owner,296 data: properties,297 };298299 Self::add_nft_item(item)?;300 }301302 303 Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));304305 Ok(())306 }307308 #[weight = 0]309 pub fn burn_item(origin, collection_id: u64, item_id: u64) -> DispatchResult {310311 let sender = ensure_signed(origin)?;312 let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);313 if !item_owner314 {315 Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;316 }317 318 Self::burn_nft_item(collection_id, item_id)?;319320 321 Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));322323 Ok(())324 }325326 #[weight = 0]327 pub fn transfer(origin, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64) -> DispatchResult {328329 let sender = ensure_signed(origin)?;330 let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);331 if !item_owner332 {333 Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;334 }335336 let target_collection = <Collection<T>>::get(collection_id);337338 339 ensure!(target_collection.mode == CollectionMode::NFT, "Collection type not implemented");340341 if target_collection.mode == CollectionMode::NFT342 {343 Self::transfer_nft(collection_id, item_id, recipient)?;344 }345346 Ok(())347 }348349 #[weight = 0]350 pub fn approve(origin, approved: T::AccountId, collection_id: u64, item_id: u64) -> DispatchResult {351352 let sender = ensure_signed(origin)?;353354 let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);355 if !item_owner356 {357 Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;358 }359360 let list_exists = <ApprovedList<T>>::contains_key(collection_id, item_id);361 if list_exists {362363 let mut list = <ApprovedList<T>>::get(collection_id, item_id);364 let item_contains = list.contains(&approved.clone());365366 if !item_contains {367 list.push(approved.clone());368 }369 } else {370371 let mut itm = Vec::new();372 itm.push(approved.clone());373 <ApprovedList<T>>::insert(collection_id, item_id, itm);374 }375376 Ok(())377 }378379 #[weight = 0]380 pub fn transfer_from(origin, recipient: T::AccountId, collection_id: u64, item_id: u64, ) -> DispatchResult {381382 let mut approved: bool = false; 383 let sender = ensure_signed(origin)?;384 let approved_list_exists = <ApprovedList<T>>::contains_key(collection_id, item_id);385 if approved_list_exists386 {387 let list_itm = <ApprovedList<T>>::get(collection_id, item_id);388 approved = list_itm.contains(&recipient.clone());389 }390391 if !approved392 {393 Self::check_owner_or_admin_permissions(collection_id, sender)?;394 }395 396 let target_collection = <Collection<T>>::get(collection_id);397398 399 ensure!(target_collection.mode == CollectionMode::NFT, "Collection type not implemented");400401 if target_collection.mode == CollectionMode::NFT402 {403 Self::transfer_nft(collection_id, item_id, recipient)?;404 }405406 Ok(())407 }408409 #[weight = 0]410 pub fn safe_transfer_from(origin, collection_id: u64, item_id: u64, new_owner: T::AccountId) -> DispatchResult {411412 413 414 415 416417 418419 420421 Ok(())422 }423 }424}425426impl<T: Trait> Module<T> {427428 fn collection_exists(collection_id: u64) -> DispatchResult{429 ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");430 Ok(())431 }432433 fn check_owner_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {434435 Self::collection_exists(collection_id)?;436437 let target_collection = <Collection<T>>::get(collection_id);438 ensure!(subject == target_collection.owner, "You do not own this collection");439440 Ok(())441 }442443 fn check_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {444445 Self::collection_exists(collection_id)?;446447 let target_collection = <Collection<T>>::get(collection_id);448 let is_owner = subject == target_collection.owner;449450 let no_perm_mes = "You do not have permissions to modify this collection";451 let exists = <AdminList<T>>::contains_key(collection_id);452453 if !is_owner454 {455 ensure!(exists, no_perm_mes);456 ensure!(<AdminList<T>>::get(collection_id).contains(&subject), no_perm_mes);457 }458 Ok(())459 }460461 fn is_item_owner(subject: T::AccountId, collection_id: u64, item_id: u64) -> bool{462463 let mut result = false;464 let target_collection = <Collection<T>>::get(collection_id);465466 if target_collection.mode == CollectionMode::NFT467 {468 let item = <NftItemList<T>>::get(collection_id, item_id);469 result = item.owner == subject;470 }471472 if target_collection.mode == CollectionMode::Fungible473 {474 let item = <FungibleItemList<T>>::get(collection_id, item_id);475 result = item.owner.contains(&subject);476 }477478 if target_collection.mode == CollectionMode::ReFungible479 {480 let item = <ReFungibleItemList<T>>::get(collection_id, item_id);481 result = item.owner.iter().any(|i| i.owner == subject);482 }483484 result485 }486487 fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {488489 let current_index = <ItemListIndex>::get(item.collection)490 .checked_add(1)491 .expect("Item list index id error");492493 Self::add_token_index(item.collection, current_index, item.owner.clone())?;494495 <ItemListIndex>::insert(item.collection, current_index);496 <NftItemList<T>>::insert(item.collection, current_index, item);497498 Ok(())499 }500501 fn burn_nft_item(collection_id: u64, item_id: u64) -> DispatchResult {502 503 let item = <NftItemList<T>>::get(collection_id, item_id);504 Self::remove_token_index(collection_id, item_id, item.owner.clone())?;505506 507 let new_balance = <Balance<T>>::get(collection_id, item.owner.clone()).checked_sub(1).unwrap();508 <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);509 <NftItemList<T>>::remove(collection_id, item_id);510511 Ok(())512 }513514 fn transfer_nft(collection_id: u64, item_id: u64, new_owner: T::AccountId) -> DispatchResult {515516 let mut item = <NftItemList<T>>::get(collection_id, item_id);517518 519 let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone()).checked_sub(1).unwrap();520 <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);521522 let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone()).checked_add(1).unwrap();523 <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);524525 526 let old_owner = item.owner.clone();527 item.owner = new_owner.clone();528 <NftItemList<T>>::insert(collection_id, item_id, item);529530 531 Self::move_token_index(collection_id, item_id, old_owner, new_owner.clone())?;532533 534 let itm: Vec<T::AccountId> = Vec::new();535 <ApprovedList<T>>::insert(collection_id, item_id, itm);536537 Ok(())538 }539540 fn add_token_index(collection_id: u64, item_index: u64, owner: T::AccountId) -> DispatchResult {541 let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());542 if list_exists {543 let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());544 let item_contains = list.contains(&item_index.clone());545546 if !item_contains {547 list.push(item_index.clone());548 }549550 <AddressTokens<T>>::insert(collection_id, owner.clone(), list);551 } else {552 let mut itm = Vec::new();553 itm.push(item_index.clone());554 <AddressTokens<T>>::insert(collection_id, owner, itm);555 }556557 Ok(())558 }559560 fn remove_token_index(561 collection_id: u64,562 item_index: u64,563 owner: T::AccountId,564 ) -> DispatchResult {565 let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());566 if list_exists {567 let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());568 let item_contains = list.contains(&item_index.clone());569570 if item_contains {571 list.retain(|&item| item != item_index);572 <AddressTokens<T>>::insert(collection_id, owner, list);573 }574 }575576 Ok(())577 }578579 fn move_token_index(580 collection_id: u64,581 item_index: u64,582 old_owner: T::AccountId,583 new_owner: T::AccountId,584 ) -> DispatchResult {585 Self::remove_token_index(collection_id, item_index, old_owner)?;586 Self::add_token_index(collection_id, item_index, new_owner)?;587588 Ok(())589 }590}