git.delta.rocks / unique-network / refs/commits / dc9fdbfccd6a

--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -3,6 +3,9 @@
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive && \
     apt-get -y install --no-install-recommends libssl-dev pkg-config libclang-dev clang
 
+RUN curl -L -o- https://github.com/WebAssembly/binaryen/releases/download/version_101/binaryen-version_101-x86_64-linux.tar.gz | \
+    tar xz --strip-components=1 -C /usr
+
 USER vscode
 
 RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash && \
@@ -11,4 +14,5 @@
     nvm install v12.20.1 && \
     rustup toolchain install nightly-2021-03-01 && \
     rustup default nightly-2021-03-01 && \
-    rustup target add wasm32-unknown-unknown
\ No newline at end of file
+    rustup target add wasm32-unknown-unknown && \
+    cargo install cargo-contract

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5395,37 +5395,37 @@
 [[package]]
 name = "pallet-scheduler"
 version = "3.0.0"
-source = "git+https://github.com/paritytech/substrate.git?branch=polkadot-v0.9.3#c94e0cdfe5556680dca1996004751eeb114755d7"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
  "frame-system",
  "log",
+ "nft-data-structs",
+ "pallet-contracts",
+ "pallet-nft",
+ "pallet-nft-transaction-payment",
  "parity-scale-codec",
+ "serde",
+ "sp-core",
  "sp-io",
  "sp-runtime",
  "sp-std",
+ "substrate-test-utils",
 ]
 
 [[package]]
 name = "pallet-scheduler"
 version = "3.0.0"
+source = "git+https://github.com/paritytech/substrate.git?branch=polkadot-v0.9.3#c94e0cdfe5556680dca1996004751eeb114755d7"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
  "frame-system",
  "log",
- "nft-data-structs",
- "pallet-contracts",
- "pallet-nft",
- "pallet-nft-transaction-payment",
  "parity-scale-codec",
- "serde",
- "sp-core",
  "sp-io",
  "sp-runtime",
  "sp-std",
- "substrate-test-utils",
 ]
 
 [[package]]

--- a/pallets/nft/src/lib.rs
+++ b/pallets/nft/src/lib.rs
@@ -566,10 +566,14 @@
 
             let sender = ensure_signed(origin)?;
             let collection = Self::get_collection(collection_id)?;
-            Self::check_owner_or_admin_permissions(&collection, sender)?;
 
-            <WhiteList<T>>::insert(collection_id, address, true);
-            
+            Self::toggle_white_list_internal(
+                &sender,
+                &collection,
+                &address,
+                true,
+            )?;
+
             Ok(())
         }
 
@@ -591,9 +595,13 @@
 
             let sender = ensure_signed(origin)?;
             let collection = Self::get_collection(collection_id)?;
-            Self::check_owner_or_admin_permissions(&collection, sender)?;
 
-            <WhiteList<T>>::remove(collection_id, address);
+            Self::toggle_white_list_internal(
+                &sender,
+                &collection,
+                &address,
+                false,
+            )?;
 
             Ok(())
         }
@@ -983,43 +991,10 @@
         pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {
 
             let sender = ensure_signed(origin)?;
-            let target_collection = Self::get_collection(collection_id)?;
-
-            Self::token_exists(&target_collection, item_id)?;
-
-            // Transfer permissions check
-            let bypasses_limits = target_collection.limits.owner_can_transfer &&
-                Self::is_owner_or_admin_permissions(
-                    &target_collection,
-                    sender.clone(),
-                );
+            let collection = Self::get_collection(collection_id)?;
 
-            let allowance_limit = if bypasses_limits {
-                None
-            } else if let Some(amount) = Self::owned_amount(
-                sender.clone(),
-                &target_collection,
-                item_id,
-            ) {
-                Some(amount)
-            } else {
-                fail!(Error::<T>::NoPermission);
-            };
-
-            if target_collection.access == AccessMode::WhiteList {
-                Self::check_white_list(&target_collection, &sender)?;
-                Self::check_white_list(&target_collection, &spender)?;
-            }
-
-            let allowance: u128 = amount
-                .checked_add(<Allowances<T>>::get(collection_id, (item_id, &sender, &spender)))
-                .ok_or(Error::<T>::NumOverflow)?;
-            if let Some(limit) = allowance_limit {
-                ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);
-            }
-            <Allowances<T>>::insert(collection_id, (item_id, sender.clone(), spender.clone()), allowance);
+            Self::approve_internal(sender, spender, &collection, item_id, amount)?;
 
-            Self::deposit_event(RawEvent::Approved(target_collection.id, item_id, sender, spender, allowance));
             Ok(())
         }
         
@@ -1047,46 +1022,10 @@
         pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {
 
             let sender = ensure_signed(origin)?;
-            let target_collection = Self::get_collection(collection_id)?;
-
-            // Check approval
-            let approval: u128 = <Allowances<T>>::get(collection_id, (item_id, &from, &sender));
-
-            // Limits check
-            Self::is_correct_transfer(&target_collection, &recipient)?;
+            let collection = Self::get_collection(collection_id)?;
 
-            // Transfer permissions check         
-            ensure!(
-                approval >= value || 
-                (
-                    target_collection.limits.owner_can_transfer &&
-                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())
-                ),
-                Error::<T>::NoPermission
-            );
-
-            if target_collection.access == AccessMode::WhiteList {
-                Self::check_white_list(&target_collection, &sender)?;
-                Self::check_white_list(&target_collection, &recipient)?;
-            }
-
-            // Reduce approval by transferred amount or remove if remaining approval drops to 0
-            if approval.saturating_sub(value) > 0 {
-                <Allowances<T>>::insert(collection_id, (item_id, &from, &sender), approval - value);
-            }
-            else {
-                <Allowances<T>>::remove(collection_id, (item_id, &from, &sender));
-            }
-
-            match target_collection.mode
-            {
-                CollectionMode::NFT => Self::transfer_nft(&target_collection, item_id, from.clone(), recipient.clone())?,
-                CollectionMode::Fungible(_)  => Self::transfer_fungible(&target_collection, value, &from, &recipient)?,
-                CollectionMode::ReFungible  => Self::transfer_refungible(&target_collection, item_id, value, from.clone(), recipient.clone())?,
-                _ => ()
-            };
+            Self::transfer_from_internal(sender, from, recipient, &collection, item_id, value)?;
 
-            Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, from, recipient, value));
             Ok(())
         }
 
@@ -1127,24 +1066,10 @@
         ) -> DispatchResult {
             let sender = ensure_signed(origin)?;
             
-            let target_collection = Self::get_collection(collection_id)?;
-            Self::token_exists(&target_collection, item_id)?;
+            let collection = Self::get_collection(collection_id)?;
 
-            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);
-
-            // Modify permissions check
-            ensure!(Self::is_item_owner(sender.clone(), &target_collection, item_id) ||
-                Self::is_owner_or_admin_permissions(&target_collection, sender.clone()),
-                Error::<T>::NoPermission);
+            Self::set_variable_meta_data_internal(sender, &collection, item_id, data)?;
 
-            match target_collection.mode
-            {
-                CollectionMode::NFT => Self::set_nft_variable_data(&target_collection, item_id, data)?,
-                CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&target_collection, item_id, data)?,
-                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),
-                _ => fail!(Error::<T>::UnexpectedCollectionType)
-            };
-
             Ok(())
         }
  
@@ -1516,6 +1441,164 @@
         Ok(())
     }
 
+	pub fn approve_internal(
+		sender: T::AccountId,
+		spender: T::AccountId,
+		collection: &CollectionHandle<T>,
+		item_id: TokenId,
+		amount: u128,
+	) -> DispatchResult {
+		Self::token_exists(&collection, item_id)?;
+
+		// Transfer permissions check
+		let bypasses_limits = collection.limits.owner_can_transfer &&
+			Self::is_owner_or_admin_permissions(
+				&collection,
+				sender.clone(),
+			);
+
+		let allowance_limit = if bypasses_limits {
+			None
+		} else if let Some(amount) = Self::owned_amount(
+			sender.clone(),
+			&collection,
+			item_id,
+		) {
+			Some(amount)
+		} else {
+			fail!(Error::<T>::NoPermission);
+		};
+
+		if collection.access == AccessMode::WhiteList {
+			Self::check_white_list(&collection, &sender)?;
+			Self::check_white_list(&collection, &spender)?;
+		}
+
+		let allowance: u128 = amount
+			.checked_add(<Allowances<T>>::get(collection.id, (item_id, &sender, &spender)))
+			.ok_or(Error::<T>::NumOverflow)?;
+		if let Some(limit) = allowance_limit {
+			ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);
+		}
+		<Allowances<T>>::insert(collection.id, (item_id, &sender, &spender), allowance);
+
+		Self::deposit_event(RawEvent::Approved(collection.id, item_id, sender, spender, allowance));
+		Ok(())
+	}
+
+	pub fn transfer_from_internal(
+		sender: T::AccountId,
+		from: T::AccountId,
+		recipient: T::AccountId,
+		collection: &CollectionHandle<T>,
+		item_id: TokenId,
+		amount: u128,
+	) -> DispatchResult {
+		// Check approval
+		let approval: u128 = <Allowances<T>>::get(collection.id, (item_id, &from, &sender));
+
+		// Limits check
+		Self::is_correct_transfer(&collection, &recipient)?;
+
+		// Transfer permissions check
+		ensure!(
+			approval >= amount || 
+			(
+				collection.limits.owner_can_transfer &&
+				Self::is_owner_or_admin_permissions(&collection, sender.clone())
+			),
+			Error::<T>::NoPermission
+		);
+
+		if collection.access == AccessMode::WhiteList {
+			Self::check_white_list(&collection, &sender)?;
+			Self::check_white_list(&collection, &recipient)?;
+		}
+
+		// Reduce approval by transferred amount or remove if remaining approval drops to 0
+		let allowance = approval.saturating_sub(amount);
+		if allowance > 0 {
+			<Allowances<T>>::insert(collection.id, (item_id, &from, &sender), allowance);
+		} else {
+			<Allowances<T>>::remove(collection.id, (item_id, &from, &sender));
+		}
+
+		match collection.mode {
+			CollectionMode::NFT => {
+				Self::transfer_nft(&collection, item_id, from.clone(), recipient.clone())?
+			}
+			CollectionMode::Fungible(_) => {
+				Self::transfer_fungible(&collection, amount, &from, &recipient)?
+			}
+			CollectionMode::ReFungible => {
+				Self::transfer_refungible(&collection, item_id, amount, from.clone(), recipient.clone())?
+			}
+			_ => ()
+		};
+
+		Ok(())
+	}
+
+    pub fn set_variable_meta_data_internal(
+        sender: T::AccountId,
+        collection: &CollectionHandle<T>, 
+        item_id: TokenId,
+        data: Vec<u8>,
+    ) -> DispatchResult {
+        Self::token_exists(&collection, item_id)?;
+
+        ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);
+
+        // Modify permissions check
+        ensure!(Self::is_item_owner(sender.clone(), &collection, item_id) ||
+            Self::is_owner_or_admin_permissions(&collection, sender.clone()),
+            Error::<T>::NoPermission);
+
+        match collection.mode
+        {
+            CollectionMode::NFT => Self::set_nft_variable_data(&collection, item_id, data)?,
+            CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&collection, item_id, data)?,
+            CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),
+            _ => fail!(Error::<T>::UnexpectedCollectionType)
+        };
+
+        Ok(())
+    }
+
+    pub fn create_multiple_items_internal(
+        sender: T::AccountId,
+        collection: &CollectionHandle<T>,
+        owner: T::AccountId,
+        items_data: Vec<CreateItemData>,
+    ) -> DispatchResult {
+        Self::can_create_items_in_collection(&collection, &sender, &owner, items_data.len() as u32)?;
+
+        for data in &items_data {
+            Self::validate_create_item_args(&collection, data)?;
+        }
+        for data in &items_data {
+            Self::create_item_no_validation(&collection, owner.clone(), data.clone())?;
+        }
+
+        Ok(())
+    }
+
+    pub fn toggle_white_list_internal(
+        sender: &T::AccountId,
+        collection: &CollectionHandle<T>,
+        address: &T::AccountId,
+        whitelisted: bool,
+    ) -> DispatchResult {
+        Self::check_owner_or_admin_permissions(&collection, sender.clone())?;
+
+        if whitelisted {
+            <WhiteList<T>>::insert(collection.id, address, true);
+        } else {
+            <WhiteList<T>>::remove(collection.id, address);
+        }
+
+        Ok(())
+    }
 
     fn is_correct_transfer(collection: &CollectionHandle<T>, recipient: &T::AccountId) -> DispatchResult {
         let collection_id = collection.id;

--- a/runtime/src/chain_extension.rs
+++ b/runtime/src/chain_extension.rs
@@ -19,6 +19,8 @@
 pub use pallet_nft::*;
 use nft_data_structs::*;
 
+use crate::Vec;
+
 /// Create item parameters
 #[derive(Debug, PartialEq, Encode, Decode)]
 pub struct NFTExtCreateItem<E: Ext> {
@@ -36,13 +38,54 @@
     pub amount: u128,
 }
 
+#[derive(Debug, PartialEq, Encode, Decode)]
+pub struct NFTExtCreateMultipleItems<E: Ext> {
+    pub owner: <E::T as SysConfig>::AccountId,
+    pub collection_id: u32,
+    pub data: Vec<CreateItemData>,
+}
+
+#[derive(Debug, PartialEq, Encode, Decode)]
+pub struct NFTExtApprove<E: Ext> {
+    pub spender: <E::T as SysConfig>::AccountId,
+    pub collection_id: u32,
+    pub item_id: u32,
+    pub amount: u128,
+}
+
+#[derive(Debug, PartialEq, Encode, Decode)]
+pub struct NFTExtTransferFrom<E: Ext> {
+    pub owner: <E::T as SysConfig>::AccountId,
+    pub recipient: <E::T as SysConfig>::AccountId,
+    pub collection_id: u32,
+    pub item_id: u32,
+    pub amount: u128,
+}
+
+#[derive(Debug, PartialEq, Encode, Decode)]
+pub struct NFTExtSetVariableMetaData {
+    pub collection_id: u32,
+    pub item_id: u32,
+    pub data: Vec<u8>,   
+}
+
+#[derive(Debug, PartialEq, Encode, Decode)]
+pub struct NFTExtToggleWhiteList<E: Ext> {
+    pub collection_id: u32,
+    pub address: <E::T as SysConfig>::AccountId,
+    pub whitelisted: bool,
+}
+
 /// The chain Extension of NFT pallet
 pub struct NFTExtension;
 
+pub type NftWeightInfoOf<C> = <C as pallet_nft::Config>::WeightInfo;
+
 impl<C: Config + pallet_contracts::Config> ChainExtension<C> for NFTExtension {
     fn call<E: Ext>(func_id: u32, env: Environment<E, InitState>) -> Result<RetVal, DispatchError>
     where
         E: Ext<T = C>,
+        C: pallet_nft::Config,
         <E::T as SysConfig>::AccountId: UncheckedFrom<<E::T as SysConfig>::Hash> + AsRef<[u8]>,
     {
         // The memory of the vm stores buf in scale-codec
@@ -50,37 +93,129 @@
             0 => {
                 let mut env = env.buf_in_buf_out();
                 let input: NFTExtTransfer<E> = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::transfer())?;
 
                 let collection = pallet_nft::Module::<C>::get_collection(input.collection_id)?;
 
-                match pallet_nft::Module::<C>::transfer_internal(
-                    env.ext().caller().clone(),
+                pallet_nft::Module::<C>::transfer_internal(
+                    env.ext().address().clone(),
                     input.recipient,
                     &collection,
                     input.token_id,
                     input.amount,
-                ) {
-                    Ok(_) => Ok(RetVal::Converging(func_id)),
-                    _ => Err(DispatchError::Other("Transfer error"))
-                }
+                )?;
+                
+                Ok(RetVal::Converging(0))
             },
             1 => {
                 // Create Item
                 let mut env = env.buf_in_buf_out();
                 let input: NFTExtCreateItem<E> = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::create_item(input.data.len()))?;
 
-                match pallet_nft::Module::<C>::create_item_internal(
+                pallet_nft::Module::<C>::create_item_internal(
                     env.ext().address().clone(),
                     input.collection_id,
                     input.owner,
                     input.data,
-                ) {
-                    Ok(_) => Ok(RetVal::Converging(func_id)),
-                    _ => Err(DispatchError::Other("CreateItem error"))
-                }
+                )?;
+                
+                Ok(RetVal::Converging(0))
             },
+            2 => {
+                // Create multiple items
+                let mut env = env.buf_in_buf_out();
+                let input: NFTExtCreateMultipleItems<E> = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::create_item(
+                    input.data.iter()
+                        .map(|i| i.len())
+                        .sum()
+                ))?;
+
+                let collection = pallet_nft::Module::<C>::get_collection(input.collection_id)?;
+
+                pallet_nft::Module::<C>::create_multiple_items_internal(
+                    env.ext().address().clone(),
+                    &collection,
+                    input.owner,
+                    input.data,
+                )?;
+                
+                Ok(RetVal::Converging(0))
+            },
+            3 => {
+                // Approve
+                let mut env = env.buf_in_buf_out();
+                let input: NFTExtApprove<E> = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::approve())?;
+
+                let collection = pallet_nft::Module::<C>::get_collection(input.collection_id)?;
+
+                pallet_nft::Module::<C>::approve_internal(
+                    env.ext().address().clone(),
+                    input.spender,
+                    &collection,
+                    input.item_id,
+                    input.amount,
+                )?;
+
+                Ok(RetVal::Converging(0))
+            },
+            4 => {
+                // Transfer from
+                let mut env = env.buf_in_buf_out();
+                let input: NFTExtTransferFrom<E> = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::transfer_from())?;
+
+                let collection = pallet_nft::Module::<C>::get_collection(input.collection_id)?;
+
+                pallet_nft::Module::<C>::transfer_from_internal(
+                    env.ext().address().clone(),
+                    input.owner,
+                    input.recipient,
+                    &collection,
+                    input.item_id,
+                    input.amount
+                )?;
+
+                Ok(RetVal::Converging(0))
+            },
+            5 => {
+                // Set variable metadata
+                let mut env = env.buf_in_buf_out();
+                let input: NFTExtSetVariableMetaData = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::set_variable_meta_data())?;
+
+                let collection = pallet_nft::Module::<C>::get_collection(input.collection_id)?;
+
+                pallet_nft::Module::<C>::set_variable_meta_data_internal(
+                    env.ext().address().clone(),
+                    &collection,
+                    input.item_id,
+                    input.data,
+                )?;
+
+                Ok(RetVal::Converging(0))
+            },
+            6 => {
+                // Toggle whitelist
+                let mut env = env.buf_in_buf_out();
+                let input: NFTExtToggleWhiteList<E> = env.read_as()?;
+                env.charge_weight(NftWeightInfoOf::<C>::add_to_white_list())?;
+
+                let collection = pallet_nft::Module::<C>::get_collection(input.collection_id)?;
+
+                pallet_nft::Module::<C>::toggle_white_list_internal(
+                    &env.ext().address().clone(),
+                    &collection,
+                    &input.address,
+                    input.whitelisted,
+                )?;
+
+                Ok(RetVal::Converging(0))
+            }
             _ => {
-                panic!("Passed unknown func_id to test chain extension: {}", func_id);
+                Err(DispatchError::Other("unknown chain_extension func_id"))
             }
         }
     }

--- a/smart_contracs/transfer/Cargo.toml
+++ b/smart_contracs/transfer/Cargo.toml
@@ -4,15 +4,17 @@
 authors = ["[Greg Zaitsev] <[your_email]>"]
 edition = "2018"
 
+[workspace]
+
 [dependencies]
-ink_primitives = { git = "https://github.com/usetech-llc/ink", branch = "unique", default-features = false }
-ink_metadata = { git = "https://github.com/usetech-llc/ink", branch = "unique", default-features = false, features = ["derive"], optional = true }
-ink_env = { git = "https://github.com/usetech-llc/ink", branch = "unique", default-features = false }
-ink_storage = { git = "https://github.com/usetech-llc/ink", branch = "unique", default-features = false }
-ink_lang = { git = "https://github.com/usetech-llc/ink", branch = "unique", default-features = false }
+ink_primitives = { default-features = false }
+ink_metadata = { default-features = false, features = ["derive"], optional = true }
+ink_env = { default-features = false }
+ink_storage = { default-features = false }
+ink_lang = { default-features = false }
 
-scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.4.1", default-features = false, features = ["derive"], optional = true }
+scale = { package = "parity-scale-codec", version = "2.1.1", default-features = false, features = ["derive"] }
+scale-info = { version = "0.6.0", default-features = false, features = ["derive"] }
 
 [lib]
 name = "nft_transfer"
@@ -28,6 +30,7 @@
     "ink_metadata/std",
     "ink_env/std",
     "ink_storage/std",
+    "ink_lang/std",
     "ink_primitives/std",
     "scale/std",
     "scale-info/std",

--- a/smart_contracs/transfer/lib.rs
+++ b/smart_contracs/transfer/lib.rs
@@ -1,4 +1,6 @@
 #![cfg_attr(not(feature = "std"), no_std)]
+extern crate alloc;
+use alloc::vec::Vec;
 
 use ink_lang as ink;
 use ink_env::{Environment, DefaultEnvironment};
@@ -36,6 +38,24 @@
     }
 }
 
+#[derive(scale::Encode, scale::Decode, scale_info::TypeInfo)]
+pub enum CreateItemData {
+    Nft {
+        const_data: Vec<u8>,
+        variable_data: Vec<u8>,
+    },
+    Fungible {
+        value: u128,
+    },
+    ReFungible {
+        const_data: Vec<u8>,
+        variable_data: Vec<u8>,
+        pieces: u128,
+    },
+}
+
+type DefaultAccountId = <DefaultEnvironment as Environment>::AccountId;
+
 #[ink::chain_extension]
 pub trait NftChainExtension {
     type ErrorCode = NftErrorCode;
@@ -43,11 +63,26 @@
     /// Transfer one NFT token from sender
     ///
     #[ink(extension = 0, returns_result = false)]
-    fn transfer(recipient: <DefaultEnvironment as Environment>::AccountId, collection_id: u32, token_id: u32, amount: u128);
+    fn transfer(recipient: DefaultAccountId, collection_id: u32, token_id: u32, amount: u128);
+    #[ink(extension = 1, returns_result = false)]
+    fn create_item(owner: DefaultAccountId, collection_id: u32, data: CreateItemData);
+    #[ink(extension = 2, returns_result = false)]
+    fn create_multiple_items(owner: DefaultAccountId, collection_id: u32, data: Vec<CreateItemData>);
+    #[ink(extension = 3, returns_result = false)]
+    fn approve(spender: DefaultAccountId, collection_id: u32, item_id: u32, amount: u128);
+    #[ink(extension = 4, returns_result = false)]
+    fn transfer_from(owner: DefaultAccountId, recipient: DefaultAccountId, collection_id: u32, item_id: u32, amount: u128);
+    #[ink(extension = 5, returns_result = false)]
+    fn set_variable_meta_data(collection_id: u32, item_id: u32, data: Vec<u8>);
+    #[ink(extension = 6, returns_result = false)]
+    fn toggle_white_list(collection_id: u32, address: DefaultAccountId, whitelisted: bool);
 }
 
-#[ink::contract(env = crate::NftEnvironment)]
+#[ink::contract(env = crate::NftEnvironment, dynamic_storage_allocator = true)]
 mod nft_transfer {
+    use alloc::vec::Vec;
+    // use ink_storage::Vec;
+    use crate::CreateItemData;
 
     #[ink(storage)]
     pub struct NftTransfer {
@@ -69,6 +104,42 @@
                 .extension()
                 .transfer(recipient, collection_id, token_id, amount);
         }
+        #[ink(message)]
+        pub fn create_item(&mut self, recipient: AccountId, collection_id: u32, data: CreateItemData) {
+            let _ = self.env()
+                .extension()
+                .create_item(recipient, collection_id, data);
+        }
+        #[ink(message)]
+        pub fn create_multiple_items(&mut self, owner: AccountId, collection_id: u32, data: Vec<CreateItemData>) {
+            let _ = self.env()
+                .extension()
+                .create_multiple_items(owner, collection_id, data);
+        }
+        #[ink(message)]
+        pub fn approve(&mut self, spender: AccountId, collection_id: u32, item_id: u32, amount: u128) {
+            let _ = self.env()
+                .extension()
+                .approve(spender, collection_id, item_id, amount);
+        }
+        #[ink(message)]
+        pub fn transfer_from(&mut self, owner: AccountId, recipient: AccountId, collection_id: u32, item_id: u32, amount: u128) {
+            let _ = self.env()
+                .extension()
+                .transfer_from(owner, recipient, collection_id, item_id, amount);
+        }
+        #[ink(message)]
+        pub fn set_variable_meta_data(&mut self, collection_id: u32, item_id: u32, data: Vec<u8>) {
+            let _ = self.env()
+                .extension()
+                .set_variable_meta_data(collection_id, item_id, data);
+        }
+        #[ink(message)]
+        pub fn toggle_white_list(&mut self, collection_id: u32, address: AccountId, whitelisted: bool) {
+            let _ = self.env()
+                .extension()
+                .toggle_white_list(collection_id, address, whitelisted);
+        }
 
     }
 

--- a/tests/src/contracts.test.ts
+++ b/tests/src/contracts.test.ts
@@ -16,9 +16,15 @@
 } from "./util/contracthelpers";
 
 import {
+  addToWhiteListExpectSuccess,
+  approveExpectSuccess,
   createCollectionExpectSuccess,
   createItemExpectSuccess,
-  getGenericResult
+  enablePublicMintingExpectSuccess,
+  enableWhiteListExpectSuccess,
+  getGenericResult,
+  isWhitelisted,
+  transferFromExpectSuccess
 } from "./util/helpers";
 
 
@@ -26,7 +32,7 @@
 const expect = chai.expect;
 
 const value = 0;
-const gasLimit = 3000n * 1000000n;
+const gasLimit = 9000n * 1000000n;
 const marketContractAddress = '5CYN9j3YvRkqxewoxeSvRbhAym4465C57uMmX5j4yz99L5H6';
 
 describe('Contracts', () => {
@@ -53,8 +59,10 @@
       expect(newContractInstance.address.toString()).to.equal(marketContractAddress);
     });
   });
+});
 
-  it('Can transfer NFT using smart contract.', async () => {
+describe.only('Chain extensions', () => {
+  it('Transfer CE', async () => {
     await usingApi(async api => {
       const alice = privateKey("//Alice");
       const bob = privateKey("//Bob");
@@ -63,6 +71,9 @@
       const collectionId = await createCollectionExpectSuccess();
       const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT');
       const [contract, deployer] = await deployTransferContract(api);
+      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, contract.address);
+      await submitTransactionAsync(alice, changeAdminTx);
+
       const tokenBefore: any = (await api.query.nft.nftItemList(collectionId, tokenId) as any).unwrap();
       
       // Transfer
@@ -77,4 +88,165 @@
       expect(tokenAfter.Owner.toString()).to.be.equal(bob.address);
     });
   });
+
+  it('Mint CE', async () => {
+    await usingApi(async api => {
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+
+      const collectionId = await createCollectionExpectSuccess();
+      const [contract, deployer] = await deployTransferContract(api);
+      await enablePublicMintingExpectSuccess(alice, collectionId);
+      await enableWhiteListExpectSuccess(alice, collectionId);
+      await addToWhiteListExpectSuccess(alice, collectionId, contract.address);
+      await addToWhiteListExpectSuccess(alice, collectionId, bob.address);
+
+      const transferTx = contract.tx.createItem(value, gasLimit, bob.address, collectionId, { Nft: {const_data: '0x010203', variable_data: '0x020304' }});
+      const events = await submitTransactionAsync(alice, transferTx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+
+      const tokensAfter: any = (await api.query.nft.nftItemList.entries(collectionId) as any).map((kv: any) => kv[1].toJSON());
+      expect(tokensAfter).to.be.deep.equal([
+        {
+          Owner: bob.address,
+          ConstData: '0x010203',
+          VariableData: '0x020304',
+        },
+      ]);
+    });
+  });
+
+  it('Bulk mint CE', async () => {
+    await usingApi(async api => {
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+
+      const collectionId = await createCollectionExpectSuccess();
+      const [contract, deployer] = await deployTransferContract(api);
+      await enablePublicMintingExpectSuccess(alice, collectionId);
+      await enableWhiteListExpectSuccess(alice, collectionId);
+      await addToWhiteListExpectSuccess(alice, collectionId, contract.address);
+      await addToWhiteListExpectSuccess(alice, collectionId, bob.address);
+
+      const transferTx = contract.tx.createMultipleItems(value, gasLimit, bob.address, collectionId, [
+        { Nft: { const_data: '0x010203', variable_data: '0x020304' } },
+        { Nft: { const_data: '0x010204', variable_data: '0x020305' } },
+        { Nft: { const_data: '0x010205', variable_data: '0x020306' } }
+      ]);
+      const events = await submitTransactionAsync(alice, transferTx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+
+      const tokensAfter: any = (await api.query.nft.nftItemList.entries(collectionId) as any)
+        .map((kv: any) => kv[1].toJSON())
+        .sort((a: any, b: any) => a.ConstData.localeCompare(b.ConstData));
+      expect(tokensAfter).to.be.deep.equal([
+        {
+          Owner: bob.address,
+          ConstData: '0x010203',
+          VariableData: '0x020304',
+        },
+        {
+          Owner: bob.address,
+          ConstData: '0x010204',
+          VariableData: '0x020305',
+        },
+        {
+          Owner: bob.address,
+          ConstData: '0x010205',
+          VariableData: '0x020306',
+        },
+      ]);
+    });
+  });
+
+  it('Approve CE', async () => {
+    await usingApi(async api => {
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+      const charlie = privateKey('//Charlie');
+
+      const collectionId = await createCollectionExpectSuccess();
+      const [contract, deployer] = await deployTransferContract(api);
+      const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', contract.address);
+
+      const transferTx = contract.tx.approve(value, gasLimit, bob.address, collectionId, tokenId, 1);
+      const events = await submitTransactionAsync(alice, transferTx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+
+      await transferFromExpectSuccess(collectionId, tokenId, bob, contract.address.toString(), charlie, 1, 'NFT');
+    });
+  });
+
+  it('TransferFrom CE', async () => {
+    await usingApi(async api => {
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+      const charlie = privateKey('//Charlie');
+
+      const collectionId = await createCollectionExpectSuccess();
+      const [contract, deployer] = await deployTransferContract(api);
+      const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', bob.address);
+      await approveExpectSuccess(collectionId, tokenId, bob, contract.address.toString(), 1);
+
+      const transferTx = contract.tx.transferFrom(value, gasLimit, bob.address, charlie.address, collectionId, tokenId, 1);
+      const events = await submitTransactionAsync(alice, transferTx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+
+      const token: any = (await api.query.nft.nftItemList(collectionId, tokenId) as any).unwrap()
+      expect(token.Owner.toString()).to.be.equal(charlie.address);
+    });
+  });
+
+  it('SetVariableMetaData CE', async () => {
+    await usingApi(async api => {
+      const alice = privateKey('//Alice');
+
+      const collectionId = await createCollectionExpectSuccess();
+      const [contract, deployer] = await deployTransferContract(api);
+      const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', contract.address);
+
+      const transferTx = contract.tx.setVariableMetaData(value, gasLimit, collectionId, tokenId, '0x121314');
+      const events = await submitTransactionAsync(alice, transferTx);
+      const result = getGenericResult(events);
+      expect(result.success).to.be.true;
+
+      const token: any = (await api.query.nft.nftItemList(collectionId, tokenId) as any).unwrap()
+      expect(token.VariableData.toString()).to.be.equal('0x121314');
+    });
+  });
+
+  it('ToggleWhiteList CE', async () => {
+    await usingApi(async api => {
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+
+      const collectionId = await createCollectionExpectSuccess();
+      const [contract, deployer] = await deployTransferContract(api);
+      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, contract.address);
+      await submitTransactionAsync(alice, changeAdminTx);      
+
+      expect(await isWhitelisted(collectionId, bob.address)).to.be.false;
+
+      {
+        const transferTx = contract.tx.toggleWhiteList(value, gasLimit, collectionId, bob.address, true);
+        const events = await submitTransactionAsync(alice, transferTx);
+        const result = getGenericResult(events);
+        expect(result.success).to.be.true;
+
+        expect(await isWhitelisted(collectionId, bob.address)).to.be.true;
+      }
+      {
+        const transferTx = contract.tx.toggleWhiteList(value, gasLimit, collectionId, bob.address, false);
+        const events = await submitTransactionAsync(alice, transferTx);
+        const result = getGenericResult(events);
+        expect(result.success).to.be.true;
+
+        expect(await isWhitelisted(collectionId, bob.address)).to.be.false;
+      }
+    });
+  });
 });

--- a/tests/src/transfer_contract/metadata.json
+++ b/tests/src/transfer_contract/metadata.json
@@ -1,9 +1,9 @@
 {
   "metadataVersion": "0.1.0",
   "source": {
-    "hash": "0xfbbc0729acefed9d99f93f6cbb751d12e317958fd0fe183f5781329b37f1bf6e",
-    "language": "ink! 3.0.0-rc2",
-    "compiler": "rustc 1.51.0-nightly"
+    "hash": "0xc6c3f47adeafe86d1674ed72c7179605787842f2f05a2d7da0dbabf3c4fa1aa8",
+    "language": "ink! 3.0.0-rc3",
+    "compiler": "rustc 1.52.0-nightly"
   },
   "contract": {
     "name": "nft_transfer",
@@ -24,7 +24,7 @@
         "name": [
           "default"
         ],
-        "selector": "0x6a3712e2"
+        "selector": "0xed4b9d1b"
       }
     ],
     "docs": [],
@@ -78,7 +78,268 @@
         ],
         "payable": false,
         "returnType": null,
-        "selector": "0xfae3a09d"
+        "selector": "0x84a15da1"
+      },
+      {
+        "args": [
+          {
+            "name": "recipient",
+            "type": {
+              "displayName": [
+                "AccountId"
+              ],
+              "type": 1
+            }
+          },
+          {
+            "name": "collection_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "data",
+            "type": {
+              "displayName": [
+                "CreateItemData"
+              ],
+              "type": 6
+            }
+          }
+        ],
+        "docs": [],
+        "mutates": true,
+        "name": [
+          "create_item"
+        ],
+        "payable": false,
+        "returnType": null,
+        "selector": "0xd7c3f083"
+      },
+      {
+        "args": [
+          {
+            "name": "owner",
+            "type": {
+              "displayName": [
+                "AccountId"
+              ],
+              "type": 1
+            }
+          },
+          {
+            "name": "collection_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "data",
+            "type": {
+              "displayName": [
+                "Vec"
+              ],
+              "type": 8
+            }
+          }
+        ],
+        "docs": [],
+        "mutates": true,
+        "name": [
+          "create_multiple_items"
+        ],
+        "payable": false,
+        "returnType": null,
+        "selector": "0x15f9a1eb"
+      },
+      {
+        "args": [
+          {
+            "name": "spender",
+            "type": {
+              "displayName": [
+                "AccountId"
+              ],
+              "type": 1
+            }
+          },
+          {
+            "name": "collection_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "item_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "amount",
+            "type": {
+              "displayName": [
+                "u128"
+              ],
+              "type": 5
+            }
+          }
+        ],
+        "docs": [],
+        "mutates": true,
+        "name": [
+          "approve"
+        ],
+        "payable": false,
+        "returnType": null,
+        "selector": "0x681266a0"
+      },
+      {
+        "args": [
+          {
+            "name": "owner",
+            "type": {
+              "displayName": [
+                "AccountId"
+              ],
+              "type": 1
+            }
+          },
+          {
+            "name": "recipient",
+            "type": {
+              "displayName": [
+                "AccountId"
+              ],
+              "type": 1
+            }
+          },
+          {
+            "name": "collection_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "item_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "amount",
+            "type": {
+              "displayName": [
+                "u128"
+              ],
+              "type": 5
+            }
+          }
+        ],
+        "docs": [],
+        "mutates": true,
+        "name": [
+          "transfer_from"
+        ],
+        "payable": false,
+        "returnType": null,
+        "selector": "0x0b396f18"
+      },
+      {
+        "args": [
+          {
+            "name": "collection_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "item_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "data",
+            "type": {
+              "displayName": [
+                "Vec"
+              ],
+              "type": 7
+            }
+          }
+        ],
+        "docs": [],
+        "mutates": true,
+        "name": [
+          "set_variable_meta_data"
+        ],
+        "payable": false,
+        "returnType": null,
+        "selector": "0xb0b26da2"
+      },
+      {
+        "args": [
+          {
+            "name": "collection_id",
+            "type": {
+              "displayName": [
+                "u32"
+              ],
+              "type": 4
+            }
+          },
+          {
+            "name": "address",
+            "type": {
+              "displayName": [
+                "AccountId"
+              ],
+              "type": 1
+            }
+          },
+          {
+            "name": "whitelisted",
+            "type": {
+              "displayName": [
+                "bool"
+              ],
+              "type": 9
+            }
+          }
+        ],
+        "docs": [],
+        "mutates": true,
+        "name": [
+          "toggle_white_list"
+        ],
+        "payable": false,
+        "returnType": null,
+        "selector": "0x98574dac"
       }
     ]
   },
@@ -93,7 +354,8 @@
         "composite": {
           "fields": [
             {
-              "type": 2
+              "type": 2,
+              "typeName": "[u8; 32]"
             }
           ]
         }
@@ -126,6 +388,82 @@
       "def": {
         "primitive": "u128"
       }
+    },
+    {
+      "def": {
+        "variant": {
+          "variants": [
+            {
+              "fields": [
+                {
+                  "name": "const_data",
+                  "type": 7,
+                  "typeName": "Vec<u8>"
+                },
+                {
+                  "name": "variable_data",
+                  "type": 7,
+                  "typeName": "Vec<u8>"
+                }
+              ],
+              "name": "Nft"
+            },
+            {
+              "fields": [
+                {
+                  "name": "value",
+                  "type": 5,
+                  "typeName": "u128"
+                }
+              ],
+              "name": "Fungible"
+            },
+            {
+              "fields": [
+                {
+                  "name": "const_data",
+                  "type": 7,
+                  "typeName": "Vec<u8>"
+                },
+                {
+                  "name": "variable_data",
+                  "type": 7,
+                  "typeName": "Vec<u8>"
+                },
+                {
+                  "name": "pieces",
+                  "type": 5,
+                  "typeName": "u128"
+                }
+              ],
+              "name": "ReFungible"
+            }
+          ]
+        }
+      },
+      "path": [
+        "nft_transfer",
+        "CreateItemData"
+      ]
+    },
+    {
+      "def": {
+        "sequence": {
+          "type": 3
+        }
+      }
+    },
+    {
+      "def": {
+        "sequence": {
+          "type": 6
+        }
+      }
+    },
+    {
+      "def": {
+        "primitive": "bool"
+      }
     }
   ]
 }
\ No newline at end of file

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