git.delta.rocks / unique-network / refs/commits / c3718108fd46

no changes

--- /dev/null
+++ b/pallets/foreing-assets/src/impl_fungibles.rs
@@ -0,0 +1,621 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+//! Implementations for fungibles trait.
+
+use super::*;
+use frame_system::Config as SystemConfig;
+
+use frame_support::traits::tokens::{DepositConsequence, WithdrawConsequence};
+use pallet_common::CollectionHandle;
+use pallet_fungible::FungibleHandle;
+use pallet_common::CommonCollectionOperations;
+use up_data_structs::budget::Unlimited;
+use sp_runtime::traits::{CheckedAdd, CheckedSub};
+
+impl<T: Config> fungibles::Inspect<<T as SystemConfig>::AccountId> for Pallet<T>
+where
+	T: orml_tokens::Config<CurrencyId = AssetIds>,
+{
+	type AssetId = AssetIds;
+	type Balance = BalanceOf<T>;
+
+	fn total_issuance(asset: Self::AssetId) -> Self::Balance {
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible total_issuance");
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let parent_amount = <pallet_balances::Pallet<T> as fungible::Inspect<
+					T::AccountId,
+				>>::total_issuance();
+
+				let value: u128 = match parent_amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let amount =
+					<orml_tokens::Pallet<T> as fungibles::Inspect<T::AccountId>>::total_issuance(
+						AssetIds::NativeAssetId(NativeCurrency::Parent),
+					);
+
+				let value: u128 = match amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::ForeignAssetId(fid) => {
+				let target_collection_id = match <AssetBinding<T>>::get(fid) {
+					Some(v) => v,
+					None => return Zero::zero(),
+				};
+				let collection_handle = match <CollectionHandle<T>>::try_get(target_collection_id) {
+					Ok(v) => v,
+					Err(_) => return Zero::zero(),
+				};
+				let collection = FungibleHandle::cast(collection_handle);
+				Self::Balance::try_from(collection.total_supply()).unwrap_or(Zero::zero())
+			}
+		}
+	}
+
+	fn minimum_balance(asset: Self::AssetId) -> Self::Balance {
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible minimum_balance");
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let parent_amount = <pallet_balances::Pallet<T> as fungible::Inspect<
+					T::AccountId,
+				>>::minimum_balance();
+
+				let value: u128 = match parent_amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let amount =
+					<orml_tokens::Pallet<T> as fungibles::Inspect<T::AccountId>>::minimum_balance(
+						AssetIds::NativeAssetId(NativeCurrency::Parent),
+					);
+
+				let value: u128 = match amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::ForeignAssetId(fid) => {
+				AssetMetadatas::<T>::get(AssetIds::ForeignAssetId(fid))
+					.map(|x| x.minimal_balance)
+					.unwrap_or_else(Zero::zero)
+			}
+		}
+	}
+
+	fn balance(asset: Self::AssetId, who: &<T as SystemConfig>::AccountId) -> Self::Balance {
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible balance");
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let parent_amount =
+					<pallet_balances::Pallet<T> as fungible::Inspect<T::AccountId>>::balance(who);
+
+				let value: u128 = match parent_amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let amount = <orml_tokens::Pallet<T> as fungibles::Inspect<T::AccountId>>::balance(
+					AssetIds::NativeAssetId(NativeCurrency::Parent),
+					who,
+				);
+
+				let value: u128 = match amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::ForeignAssetId(fid) => {
+				let target_collection_id = match <AssetBinding<T>>::get(fid) {
+					Some(v) => v,
+					None => return Zero::zero(),
+				};
+				let collection_handle = match <CollectionHandle<T>>::try_get(target_collection_id) {
+					Ok(v) => v,
+					Err(_) => return Zero::zero(),
+				};
+				let collection = FungibleHandle::cast(collection_handle);
+				Self::Balance::try_from(
+					collection.balance(T::CrossAccountId::from_sub(who.clone()), TokenId(0)),
+				)
+				.unwrap_or(Zero::zero())
+			}
+		}
+	}
+
+	fn reducible_balance(
+		asset: Self::AssetId,
+		who: &<T as SystemConfig>::AccountId,
+		keep_alive: bool,
+	) -> Self::Balance {
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible reducible_balance");
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let parent_amount = <pallet_balances::Pallet<T> as fungible::Inspect<
+					T::AccountId,
+				>>::reducible_balance(who, keep_alive);
+
+				let value: u128 = match parent_amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let amount =
+					<orml_tokens::Pallet<T> as fungibles::Inspect<T::AccountId>>::reducible_balance(
+						AssetIds::NativeAssetId(NativeCurrency::Parent),
+						who,
+						keep_alive,
+					);
+
+				let value: u128 = match amount.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				let ti: Self::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => return Zero::zero(),
+				};
+
+				ti
+			}
+			_ => Self::balance(asset, who),
+		}
+	}
+
+	fn can_deposit(
+		asset: Self::AssetId,
+		who: &<T as SystemConfig>::AccountId,
+		amount: Self::Balance,
+		mint: bool,
+	) -> DepositConsequence {
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible can_deposit");
+
+		let value: u128 = match amount.try_into() {
+			Ok(val) => val,
+			Err(_) => return DepositConsequence::CannotCreate,
+		};
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let this_amount: <T as pallet_balances::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return DepositConsequence::CannotCreate;
+					}
+				};
+				<pallet_balances::Pallet<T> as fungible::Inspect<T::AccountId>>::can_deposit(
+					who,
+					this_amount,
+					mint,
+				)
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let parent_amount: <T as orml_tokens::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return DepositConsequence::CannotCreate;
+					}
+				};
+				<orml_tokens::Pallet<T> as fungibles::Inspect<T::AccountId>>::can_deposit(
+					AssetIds::NativeAssetId(NativeCurrency::Parent),
+					who,
+					parent_amount,
+					mint,
+				)
+			}
+			_ => {
+				if amount.is_zero() {
+					return DepositConsequence::Success;
+				}
+
+				let extential_deposit_value = T::ExistentialDeposit::get();
+				let ed_value: u128 = match extential_deposit_value.try_into() {
+					Ok(val) => val,
+					Err(_) => return DepositConsequence::CannotCreate,
+				};
+				let extential_deposit: Self::Balance = match ed_value.try_into() {
+					Ok(val) => val,
+					Err(_) => return DepositConsequence::CannotCreate,
+				};
+
+				let new_total_balance = match Self::balance(asset, who).checked_add(&amount) {
+					Some(x) => x,
+					None => return DepositConsequence::Overflow,
+				};
+
+				if new_total_balance < extential_deposit {
+					return DepositConsequence::BelowMinimum;
+				}
+
+				DepositConsequence::Success
+			}
+		}
+	}
+
+	fn can_withdraw(
+		asset: Self::AssetId,
+		who: &<T as SystemConfig>::AccountId,
+		amount: Self::Balance,
+	) -> WithdrawConsequence<Self::Balance> {
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible can_withdraw");
+		let value: u128 = match amount.try_into() {
+			Ok(val) => val,
+			Err(_) => return WithdrawConsequence::UnknownAsset,
+		};
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let this_amount: <T as pallet_balances::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return WithdrawConsequence::UnknownAsset;
+					}
+				};
+				match <pallet_balances::Pallet<T> as fungible::Inspect<T::AccountId>>::can_withdraw(
+					who,
+					this_amount,
+				) {
+					WithdrawConsequence::NoFunds => WithdrawConsequence::NoFunds,
+					WithdrawConsequence::WouldDie => WithdrawConsequence::WouldDie,
+					WithdrawConsequence::UnknownAsset => WithdrawConsequence::UnknownAsset,
+					WithdrawConsequence::Underflow => WithdrawConsequence::Underflow,
+					WithdrawConsequence::Overflow => WithdrawConsequence::Overflow,
+					WithdrawConsequence::Frozen => WithdrawConsequence::Frozen,
+					WithdrawConsequence::Success => WithdrawConsequence::Success,
+					_ => WithdrawConsequence::NoFunds,
+				}
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let parent_amount: <T as orml_tokens::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return WithdrawConsequence::UnknownAsset;
+					}
+				};
+				match <orml_tokens::Pallet<T> as fungibles::Inspect<T::AccountId>>::can_withdraw(
+					AssetIds::NativeAssetId(NativeCurrency::Parent),
+					who,
+					parent_amount,
+				) {
+					WithdrawConsequence::NoFunds => WithdrawConsequence::NoFunds,
+					WithdrawConsequence::WouldDie => WithdrawConsequence::WouldDie,
+					WithdrawConsequence::UnknownAsset => WithdrawConsequence::UnknownAsset,
+					WithdrawConsequence::Underflow => WithdrawConsequence::Underflow,
+					WithdrawConsequence::Overflow => WithdrawConsequence::Overflow,
+					WithdrawConsequence::Frozen => WithdrawConsequence::Frozen,
+					WithdrawConsequence::Success => WithdrawConsequence::Success,
+					_ => WithdrawConsequence::NoFunds,
+				}
+			}
+			_ => match Self::balance(asset, who).checked_sub(&amount) {
+				Some(_) => WithdrawConsequence::Success,
+				None => WithdrawConsequence::NoFunds,
+			},
+		}
+	}
+}
+
+impl<T: Config> fungibles::Mutate<<T as SystemConfig>::AccountId> for Pallet<T>
+where
+	T: orml_tokens::Config<CurrencyId = AssetIds>,
+{
+	fn mint_into(
+		asset: Self::AssetId,
+		who: &<T as SystemConfig>::AccountId,
+		amount: Self::Balance,
+	) -> DispatchResult {
+		//Self::do_mint(asset, who, amount, None)
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible mint_into {:?}", asset);
+
+		let value: u128 = match amount.try_into() {
+			Ok(val) => val,
+			Err(_) => return Err(DispatchError::Other("Bad amount to value conversion")),
+		};
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let this_amount: <T as pallet_balances::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return Err(DispatchError::Other(
+							"Bad amount to this parachain value conversion",
+						))
+					}
+				};
+
+				<pallet_balances::Pallet<T> as fungible::Mutate<T::AccountId>>::mint_into(
+					who,
+					this_amount,
+				)
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let parent_amount: <T as orml_tokens::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return Err(DispatchError::Other(
+							"Bad amount to relay chain value conversion",
+						))
+					}
+				};
+
+				<orml_tokens::Pallet<T> as fungibles::Mutate<T::AccountId>>::mint_into(
+					AssetIds::NativeAssetId(NativeCurrency::Parent),
+					who,
+					parent_amount,
+				)
+			}
+			AssetIds::ForeignAssetId(fid) => {
+				let target_collection_id = match <AssetBinding<T>>::get(fid) {
+					Some(v) => v,
+					None => {
+						return Err(DispatchError::Other(
+							"Associated collection not found for asset",
+						))
+					}
+				};
+				let collection =
+					FungibleHandle::cast(<CollectionHandle<T>>::try_get(target_collection_id)?);
+				let account = T::CrossAccountId::from_sub(who.clone());
+
+				let amount_data: pallet_fungible::CreateItemData<T> = (account.clone(), value);
+
+				pallet_fungible::Pallet::<T>::create_item_foreign(
+					&collection,
+					&account,
+					amount_data,
+					&Unlimited,
+				)?;
+
+				Ok(())
+			}
+		}
+	}
+
+	fn burn_from(
+		asset: Self::AssetId,
+		who: &<T as SystemConfig>::AccountId,
+		amount: Self::Balance,
+	) -> Result<Self::Balance, DispatchError> {
+		// let f = DebitFlags { keep_alive: false, best_effort: false };
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible burn_from");
+
+		let value: u128 = match amount.try_into() {
+			Ok(val) => val,
+			Err(_) => return Err(DispatchError::Other("Bad amount to value conversion")),
+		};
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let this_amount: <T as pallet_balances::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return Err(DispatchError::Other(
+							"Bad amount to this parachain value conversion",
+						))
+					}
+				};
+
+				match <pallet_balances::Pallet<T> as fungible::Mutate<T::AccountId>>::burn_from(
+					who,
+					this_amount,
+				) {
+					Ok(_) => Ok(amount),
+					Err(e) => Err(e),
+				}
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let parent_amount: <T as orml_tokens::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return Err(DispatchError::Other(
+							"Bad amount to relay chain value conversion",
+						))
+					}
+				};
+
+				match <orml_tokens::Pallet<T> as fungibles::Mutate<T::AccountId>>::burn_from(
+					AssetIds::NativeAssetId(NativeCurrency::Parent),
+					who,
+					parent_amount,
+				) {
+					Ok(_) => Ok(amount),
+					Err(e) => Err(e),
+				}
+			}
+			AssetIds::ForeignAssetId(fid) => {
+				let target_collection_id = match <AssetBinding<T>>::get(fid) {
+					Some(v) => v,
+					None => {
+						return Err(DispatchError::Other(
+							"Associated collection not found for asset",
+						))
+					}
+				};
+				let collection =
+					FungibleHandle::cast(<CollectionHandle<T>>::try_get(target_collection_id)?);
+				pallet_fungible::Pallet::<T>::burn_foreign(
+					&collection,
+					&T::CrossAccountId::from_sub(who.clone()),
+					value,
+				)?;
+
+				Ok(amount)
+			}
+		}
+	}
+
+	fn slash(
+		asset: Self::AssetId,
+		who: &<T as SystemConfig>::AccountId,
+		amount: Self::Balance,
+	) -> Result<Self::Balance, DispatchError> {
+		// let f = DebitFlags { keep_alive: false, best_effort: true };
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible slash");
+		Self::burn_from(asset, who, amount)?;
+		Ok(amount)
+	}
+}
+
+impl<T: Config> fungibles::Transfer<T::AccountId> for Pallet<T>
+where
+	T: orml_tokens::Config<CurrencyId = AssetIds>,
+{
+	fn transfer(
+		asset: Self::AssetId,
+		source: &<T as SystemConfig>::AccountId,
+		dest: &<T as SystemConfig>::AccountId,
+		amount: Self::Balance,
+		keep_alive: bool,
+	) -> Result<Self::Balance, DispatchError> {
+		// let f = TransferFlags { keep_alive, best_effort: false, burn_dust: false };
+		log::trace!(target: "fassets::impl_foreing_assets", "impl_fungible transfer");
+
+		let value: u128 = match amount.try_into() {
+			Ok(val) => val,
+			Err(_) => return Err(DispatchError::Other("Bad amount to value conversion")),
+		};
+
+		match asset {
+			AssetIds::NativeAssetId(NativeCurrency::Here) => {
+				let this_amount: <T as pallet_balances::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return Err(DispatchError::Other(
+							"Bad amount to this parachain value conversion",
+						))
+					}
+				};
+
+				match <pallet_balances::Pallet<T> as fungible::Transfer<T::AccountId>>::transfer(
+					source,
+					dest,
+					this_amount,
+					keep_alive,
+				) {
+					Ok(_) => Ok(amount),
+					Err(_) => Err(DispatchError::Other(
+						"Bad amount to relay chain value conversion",
+					)),
+				}
+			}
+			AssetIds::NativeAssetId(NativeCurrency::Parent) => {
+				let parent_amount: <T as orml_tokens::Config>::Balance = match value.try_into() {
+					Ok(val) => val,
+					Err(_) => {
+						return Err(DispatchError::Other(
+							"Bad amount to relay chain value conversion",
+						))
+					}
+				};
+
+				match <orml_tokens::Pallet<T> as fungibles::Transfer<T::AccountId>>::transfer(
+					AssetIds::NativeAssetId(NativeCurrency::Parent),
+					source,
+					dest,
+					parent_amount,
+					keep_alive,
+				) {
+					Ok(_) => Ok(amount),
+					Err(e) => Err(e),
+				}
+			}
+			AssetIds::ForeignAssetId(fid) => {
+				let target_collection_id = match <AssetBinding<T>>::get(fid) {
+					Some(v) => v,
+					None => {
+						return Err(DispatchError::Other(
+							"Associated collection not found for asset",
+						))
+					}
+				};
+				let collection =
+					FungibleHandle::cast(<CollectionHandle<T>>::try_get(target_collection_id)?);
+
+				pallet_fungible::Pallet::<T>::transfer(
+					&collection,
+					&T::CrossAccountId::from_sub(source.clone()),
+					&T::CrossAccountId::from_sub(dest.clone()),
+					value,
+					&Unlimited,
+				)?;
+
+				Ok(amount)
+			}
+		}
+	}
+}

--- /dev/null
+++ b/pallets/foreing-assets/src/lib.rs
@@ -0,0 +1,541 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+//! # Foreing assets
+//!
+//! - [`Config`]
+//! - [`Call`]
+//! - [`Pallet`]
+//!
+//! ## Overview
+//!
+//! The foreing assests pallet provides functions for:
+//!
+//! - Local and foreign assets management. The foreign assets can be updated without runtime upgrade.
+//! - Bounds between asset and target collection for cross chain transfer and inner transfers.
+//!
+//! ## Overview
+//!
+//! Under construction
+
+#![cfg_attr(not(feature = "std"), no_std)]
+#![allow(clippy::unused_unit)]
+
+use frame_support::{
+	dispatch::DispatchResult,
+	ensure,
+	pallet_prelude::*,
+	traits::{fungible, fungibles, Currency, EnsureOrigin},
+	transactional, RuntimeDebug,
+};
+use frame_system::pallet_prelude::*;
+use up_data_structs::{CollectionMode};
+use pallet_fungible::{Pallet as PalletFungible};
+use scale_info::{TypeInfo};
+use sp_runtime::{
+	traits::{One, Zero},
+	ArithmeticError,
+};
+use sp_std::{boxed::Box, vec::Vec};
+use up_data_structs::{CollectionId, TokenId, CreateCollectionData};
+
+// NOTE:v1::MultiLocation is used in storages, we would need to do migration if upgrade the
+// MultiLocation in the future.
+use xcm::opaque::latest::{prelude::XcmError, MultiAsset};
+use xcm::{v1::MultiLocation, VersionedMultiLocation};
+use xcm_executor::{traits::WeightTrader, Assets};
+
+use pallet_common::erc::CrossAccountId;
+
+#[cfg(feature = "std")]
+use serde::{Deserialize, Serialize};
+
+// TODO: Move to primitives
+// Id of native currency.
+// 0 - QTZ\UNQ
+// 1 - KSM\DOT
+#[derive(
+	Clone,
+	Copy,
+	Eq,
+	PartialEq,
+	PartialOrd,
+	Ord,
+	MaxEncodedLen,
+	RuntimeDebug,
+	Encode,
+	Decode,
+	TypeInfo,
+)]
+#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
+pub enum NativeCurrency {
+	Here = 0,
+	Parent = 1,
+}
+
+#[derive(
+	Clone,
+	Copy,
+	Eq,
+	PartialEq,
+	PartialOrd,
+	Ord,
+	MaxEncodedLen,
+	RuntimeDebug,
+	Encode,
+	Decode,
+	TypeInfo,
+)]
+#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
+pub enum AssetIds {
+	ForeignAssetId(ForeignAssetId),
+	NativeAssetId(NativeCurrency),
+}
+
+pub trait TryAsForeing<T, F> {
+	fn try_as_foreing(asset: T) -> Option<F>;
+}
+
+impl TryAsForeing<AssetIds, ForeignAssetId> for AssetIds {
+	fn try_as_foreing(asset: AssetIds) -> Option<ForeignAssetId> {
+		match asset {
+			AssetIds::ForeignAssetId(id) => Some(id),
+			_ => None,
+		}
+	}
+}
+
+pub type ForeignAssetId = u32;
+pub type CurrencyId = AssetIds;
+
+mod impl_fungibles;
+mod weights;
+
+pub use module::*;
+pub use weights::WeightInfo;
+
+/// Type alias for currency balance.
+pub type BalanceOf<T> =
+	<<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance;
+
+/// A mapping between ForeignAssetId and AssetMetadata.
+pub trait AssetIdMapping<ForeignAssetId, MultiLocation, AssetMetadata> {
+	/// Returns the AssetMetadata associated with a given ForeignAssetId.
+	fn get_asset_metadata(foreign_asset_id: ForeignAssetId) -> Option<AssetMetadata>;
+	/// Returns the MultiLocation associated with a given ForeignAssetId.
+	fn get_multi_location(foreign_asset_id: ForeignAssetId) -> Option<MultiLocation>;
+	/// Returns the CurrencyId associated with a given MultiLocation.
+	fn get_currency_id(multi_location: MultiLocation) -> Option<CurrencyId>;
+}
+
+pub struct XcmForeignAssetIdMapping<T>(sp_std::marker::PhantomData<T>);
+
+impl<T: Config> AssetIdMapping<ForeignAssetId, MultiLocation, AssetMetadata<BalanceOf<T>>>
+	for XcmForeignAssetIdMapping<T>
+{
+	fn get_asset_metadata(foreign_asset_id: ForeignAssetId) -> Option<AssetMetadata<BalanceOf<T>>> {
+		log::trace!(target: "fassets::asset_metadatas", "call");
+		Pallet::<T>::asset_metadatas(AssetIds::ForeignAssetId(foreign_asset_id))
+	}
+
+	fn get_multi_location(foreign_asset_id: ForeignAssetId) -> Option<MultiLocation> {
+		log::trace!(target: "fassets::get_multi_location", "call");
+		Pallet::<T>::foreign_asset_locations(foreign_asset_id)
+	}
+
+	fn get_currency_id(multi_location: MultiLocation) -> Option<CurrencyId> {
+		log::trace!(target: "fassets::get_currency_id", "call");
+		Some(AssetIds::ForeignAssetId(
+			Pallet::<T>::location_to_currency_ids(multi_location).unwrap_or(0),
+		))
+	}
+}
+
+#[frame_support::pallet]
+pub mod module {
+	use super::*;
+
+	#[pallet::config]
+	pub trait Config:
+		frame_system::Config
+		+ pallet_common::Config
+		+ pallet_fungible::Config
+		+ orml_tokens::Config
+		+ pallet_balances::Config
+	{
+		/// The overarching event type.
+		type Event: From<Event<Self>> + IsType<<Self as frame_system::Config>::Event>;
+
+		/// Currency type for withdraw and balance storage.
+		type Currency: Currency<Self::AccountId>;
+
+		/// Required origin for registering asset.
+		type RegisterOrigin: EnsureOrigin<Self::Origin>;
+
+		/// Weight information for the extrinsics in this module.
+		type WeightInfo: WeightInfo;
+	}
+
+	#[derive(Clone, Eq, PartialEq, RuntimeDebug, Encode, Decode, TypeInfo)]
+	pub struct AssetMetadata<Balance> {
+		pub name: Vec<u8>,
+		pub symbol: Vec<u8>,
+		pub decimals: u8,
+		pub minimal_balance: Balance,
+	}
+
+	#[pallet::error]
+	pub enum Error<T> {
+		/// The given location could not be used (e.g. because it cannot be expressed in the
+		/// desired version of XCM).
+		BadLocation,
+		/// MultiLocation existed
+		MultiLocationExisted,
+		/// AssetId not exists
+		AssetIdNotExists,
+		/// AssetId exists
+		AssetIdExisted,
+	}
+
+	#[pallet::event]
+	#[pallet::generate_deposit(fn deposit_event)]
+	pub enum Event<T: Config> {
+		/// The foreign asset registered.
+		ForeignAssetRegistered {
+			asset_id: ForeignAssetId,
+			asset_address: MultiLocation,
+			metadata: AssetMetadata<BalanceOf<T>>,
+		},
+		/// The foreign asset updated.
+		ForeignAssetUpdated {
+			asset_id: ForeignAssetId,
+			asset_address: MultiLocation,
+			metadata: AssetMetadata<BalanceOf<T>>,
+		},
+		/// The asset registered.
+		AssetRegistered {
+			asset_id: AssetIds,
+			metadata: AssetMetadata<BalanceOf<T>>,
+		},
+		/// The asset updated.
+		AssetUpdated {
+			asset_id: AssetIds,
+			metadata: AssetMetadata<BalanceOf<T>>,
+		},
+	}
+
+	/// Next available Foreign AssetId ID.
+	///
+	/// NextForeignAssetId: ForeignAssetId
+	#[pallet::storage]
+	#[pallet::getter(fn next_foreign_asset_id)]
+	pub type NextForeignAssetId<T: Config> = StorageValue<_, ForeignAssetId, ValueQuery>;
+	/// The storages for MultiLocations.
+	///
+	/// ForeignAssetLocations: map ForeignAssetId => Option<MultiLocation>
+	#[pallet::storage]
+	#[pallet::getter(fn foreign_asset_locations)]
+	pub type ForeignAssetLocations<T: Config> =
+		StorageMap<_, Twox64Concat, ForeignAssetId, MultiLocation, OptionQuery>;
+
+	/// The storages for CurrencyIds.
+	///
+	/// LocationToCurrencyIds: map MultiLocation => Option<ForeignAssetId>
+	#[pallet::storage]
+	#[pallet::getter(fn location_to_currency_ids)]
+	pub type LocationToCurrencyIds<T: Config> =
+		StorageMap<_, Twox64Concat, MultiLocation, ForeignAssetId, OptionQuery>;
+
+	/// The storages for AssetMetadatas.
+	///
+	/// AssetMetadatas: map AssetIds => Option<AssetMetadata>
+	#[pallet::storage]
+	#[pallet::getter(fn asset_metadatas)]
+	pub type AssetMetadatas<T: Config> =
+		StorageMap<_, Twox64Concat, AssetIds, AssetMetadata<BalanceOf<T>>, OptionQuery>;
+
+	/// The storages for assets to fungible collection binding
+	///
+	#[pallet::storage]
+	#[pallet::getter(fn asset_binding)]
+	pub type AssetBinding<T: Config> =
+		StorageMap<_, Twox64Concat, ForeignAssetId, CollectionId, OptionQuery>;
+
+	#[pallet::pallet]
+	#[pallet::without_storage_info]
+	pub struct Pallet<T>(_);
+
+	#[pallet::call]
+	impl<T: Config> Pallet<T> {
+		#[pallet::weight(<T as Config>::WeightInfo::register_foreign_asset())]
+		#[transactional]
+		pub fn register_foreign_asset(
+			origin: OriginFor<T>,
+			owner: T::AccountId,
+			location: Box<VersionedMultiLocation>,
+			metadata: Box<AssetMetadata<BalanceOf<T>>>,
+		) -> DispatchResult {
+			T::RegisterOrigin::ensure_origin(origin.clone())?;
+
+			let location: MultiLocation = (*location)
+				.try_into()
+				.map_err(|()| Error::<T>::BadLocation)?;
+
+			let md = metadata.clone();
+			let name: Vec<u16> = md.name.into_iter().map(|x| x as u16).collect::<Vec<u16>>();
+			let mut description: Vec<u16> = "Foreing assets collection for "
+				.encode_utf16()
+				.collect::<Vec<u16>>();
+			description.append(&mut name.clone());
+
+			let data: CreateCollectionData<T::AccountId> = CreateCollectionData {
+				name: name.try_into().unwrap(),
+				description: description.try_into().unwrap(),
+				mode: CollectionMode::Fungible(18),
+				..Default::default()
+			};
+
+			let bounded_collection_id = <PalletFungible<T>>::init_foreign_collection(
+				CrossAccountId::from_sub(owner),
+				data,
+			)?;
+			let foreign_asset_id =
+				Self::do_register_foreign_asset(&location, &metadata, bounded_collection_id)?;
+
+			Self::deposit_event(Event::<T>::ForeignAssetRegistered {
+				asset_id: foreign_asset_id,
+				asset_address: location,
+				metadata: *metadata,
+			});
+			Ok(())
+		}
+
+		#[pallet::weight(<T as Config>::WeightInfo::update_foreign_asset())]
+		#[transactional]
+		pub fn update_foreign_asset(
+			origin: OriginFor<T>,
+			foreign_asset_id: ForeignAssetId,
+			location: Box<VersionedMultiLocation>,
+			metadata: Box<AssetMetadata<BalanceOf<T>>>,
+		) -> DispatchResult {
+			T::RegisterOrigin::ensure_origin(origin)?;
+
+			let location: MultiLocation = (*location)
+				.try_into()
+				.map_err(|()| Error::<T>::BadLocation)?;
+			Self::do_update_foreign_asset(foreign_asset_id, &location, &metadata)?;
+
+			Self::deposit_event(Event::<T>::ForeignAssetUpdated {
+				asset_id: foreign_asset_id,
+				asset_address: location,
+				metadata: *metadata,
+			});
+			Ok(())
+		}
+	}
+}
+
+impl<T: Config> Pallet<T> {
+	fn get_next_foreign_asset_id() -> Result<ForeignAssetId, DispatchError> {
+		NextForeignAssetId::<T>::try_mutate(|current| -> Result<ForeignAssetId, DispatchError> {
+			let id = *current;
+			*current = current
+				.checked_add(One::one())
+				.ok_or(ArithmeticError::Overflow)?;
+			Ok(id)
+		})
+	}
+
+	fn do_register_foreign_asset(
+		location: &MultiLocation,
+		metadata: &AssetMetadata<BalanceOf<T>>,
+		bounded_collection_id: CollectionId,
+	) -> Result<ForeignAssetId, DispatchError> {
+		let foreign_asset_id = Self::get_next_foreign_asset_id()?;
+		LocationToCurrencyIds::<T>::try_mutate(location, |maybe_currency_ids| -> DispatchResult {
+			ensure!(
+				maybe_currency_ids.is_none(),
+				Error::<T>::MultiLocationExisted
+			);
+			*maybe_currency_ids = Some(foreign_asset_id);
+			// *maybe_currency_ids = Some(CurrencyId::ForeignAsset(foreign_asset_id));
+
+			ForeignAssetLocations::<T>::try_mutate(
+				foreign_asset_id,
+				|maybe_location| -> DispatchResult {
+					ensure!(maybe_location.is_none(), Error::<T>::MultiLocationExisted);
+					*maybe_location = Some(location.clone());
+
+					AssetMetadatas::<T>::try_mutate(
+						AssetIds::ForeignAssetId(foreign_asset_id),
+						|maybe_asset_metadatas| -> DispatchResult {
+							ensure!(maybe_asset_metadatas.is_none(), Error::<T>::AssetIdExisted);
+							*maybe_asset_metadatas = Some(metadata.clone());
+							Ok(())
+						},
+					)
+				},
+			)?;
+
+			AssetBinding::<T>::try_mutate(foreign_asset_id, |collection_id| -> DispatchResult {
+				*collection_id = Some(bounded_collection_id);
+				Ok(())
+			})
+		})?;
+
+		Ok(foreign_asset_id)
+	}
+
+	fn do_update_foreign_asset(
+		foreign_asset_id: ForeignAssetId,
+		location: &MultiLocation,
+		metadata: &AssetMetadata<BalanceOf<T>>,
+	) -> DispatchResult {
+		ForeignAssetLocations::<T>::try_mutate(
+			foreign_asset_id,
+			|maybe_multi_locations| -> DispatchResult {
+				let old_multi_locations = maybe_multi_locations
+					.as_mut()
+					.ok_or(Error::<T>::AssetIdNotExists)?;
+
+				AssetMetadatas::<T>::try_mutate(
+					AssetIds::ForeignAssetId(foreign_asset_id),
+					|maybe_asset_metadatas| -> DispatchResult {
+						ensure!(
+							maybe_asset_metadatas.is_some(),
+							Error::<T>::AssetIdNotExists
+						);
+
+						// modify location
+						if location != old_multi_locations {
+							LocationToCurrencyIds::<T>::remove(old_multi_locations.clone());
+							LocationToCurrencyIds::<T>::try_mutate(
+								location,
+								|maybe_currency_ids| -> DispatchResult {
+									ensure!(
+										maybe_currency_ids.is_none(),
+										Error::<T>::MultiLocationExisted
+									);
+									// *maybe_currency_ids = Some(CurrencyId::ForeignAsset(foreign_asset_id));
+									*maybe_currency_ids = Some(foreign_asset_id);
+									Ok(())
+								},
+							)?;
+						}
+						*maybe_asset_metadatas = Some(metadata.clone());
+						*old_multi_locations = location.clone();
+						Ok(())
+					},
+				)
+			},
+		)
+	}
+}
+
+use sp_runtime::SaturatedConversion;
+use sp_runtime::traits::Saturating;
+pub use frame_support::{
+	traits::{
+		fungibles::{Balanced, CreditOf},
+		tokens::currency::Currency as CurrencyT,
+		OnUnbalanced as OnUnbalancedT,
+	},
+	weights::{WeightToFeePolynomial, WeightToFee},
+};
+
+use xcm::latest::{Fungibility::Fungible as XcmFungible};
+
+pub struct UsingAnyCurrencyComponents<
+	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,
+	AssetId: Get<MultiLocation>,
+	AccountId,
+	Currency: CurrencyT<AccountId>,
+	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,
+>(
+	Weight,
+	Currency::Balance,
+	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,
+);
+
+impl<
+		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,
+		AssetId: Get<MultiLocation>,
+		AccountId,
+		Currency: CurrencyT<AccountId>,
+		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,
+	> WeightTrader
+	for UsingAnyCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>
+{
+	fn new() -> Self {
+		Self(0, Zero::zero(), PhantomData)
+	}
+
+	fn buy_weight(&mut self, weight: Weight, payment: Assets) -> Result<Assets, XcmError> {
+		log::trace!(target: "fassets::weight", "buy_weight weight: {:?}, payment: {:?}", weight, payment);
+
+		let amount = WeightToFee::weight_to_fee(&weight);
+		let u128_amount: u128 = amount.try_into().map_err(|_| XcmError::Overflow)?;
+
+		let asset_id = payment
+			.fungible
+			.iter()
+			.next()
+			.map_or(Err(XcmError::TooExpensive), |v| Ok(v.0))?;
+
+		// First fungible pays fee
+		let required = MultiAsset {
+			id: asset_id.clone(),
+			fun: XcmFungible(u128_amount),
+		};
+
+		log::trace!(
+			target: "fassets::weight", "buy_weight payment: {:?}, required: {:?}",
+			payment, required,
+		);
+
+		let unused = payment
+			.checked_sub(required)
+			.map_err(|_| XcmError::TooExpensive)?;
+		self.0 = self.0.saturating_add(weight);
+		self.1 = self.1.saturating_add(amount);
+		Ok(unused)
+	}
+
+	fn refund_weight(&mut self, weight: Weight) -> Option<MultiAsset> {
+		let weight = weight.min(self.0);
+		let amount = WeightToFee::weight_to_fee(&weight);
+		self.0 -= weight;
+		self.1 = self.1.saturating_sub(amount);
+		let amount: u128 = amount.saturated_into();
+		if amount > 0 {
+			Some((AssetId::get(), amount).into())
+		} else {
+			None
+		}
+	}
+}
+impl<
+		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,
+		AssetId: Get<MultiLocation>,
+		AccountId,
+		Currency: CurrencyT<AccountId>,
+		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,
+	> Drop for UsingAnyCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>
+{
+	fn drop(&mut self) {
+		OnUnbalanced::on_unbalanced(Currency::issue(self.1));
+	}
+}

--- /dev/null
+++ b/pallets/foreing-assets/src/weights.rs
@@ -0,0 +1,43 @@
+
+#![cfg_attr(rustfmt, rustfmt_skip)]
+#![allow(unused_parens)]
+#![allow(unused_imports)]
+#![allow(clippy::unnecessary_cast)]
+
+use frame_support::{traits::Get, weights::{Weight, constants::RocksDbWeight}};
+use sp_std::marker::PhantomData;
+
+/// Weight functions needed for module_asset_registry.
+pub trait WeightInfo {
+	fn register_foreign_asset() -> Weight;
+	fn update_foreign_asset() -> Weight;
+}
+
+/// Weights for module_asset_registry using the Acala node and recommended hardware.
+pub struct AcalaWeight<T>(PhantomData<T>);
+impl<T: frame_system::Config> WeightInfo for AcalaWeight<T> {
+	fn register_foreign_asset() -> Weight {
+		(29_819_000 as Weight)
+			.saturating_add(T::DbWeight::get().reads(2 as Weight))
+			.saturating_add(T::DbWeight::get().writes(3 as Weight))
+	}
+	fn update_foreign_asset() -> Weight {
+		(25_119_000 as Weight)
+			.saturating_add(T::DbWeight::get().reads(1 as Weight))
+			.saturating_add(T::DbWeight::get().writes(1 as Weight))
+	}
+}
+
+// For backwards compatibility and tests
+impl WeightInfo for () {
+	fn register_foreign_asset() -> Weight {
+		(29_819_000 as Weight)
+			.saturating_add(RocksDbWeight::get().reads(2 as Weight))
+			.saturating_add(RocksDbWeight::get().writes(3 as Weight))
+	}
+	fn update_foreign_asset() -> Weight {
+		(25_119_000 as Weight)
+			.saturating_add(RocksDbWeight::get().reads(1 as Weight))
+			.saturating_add(RocksDbWeight::get().writes(1 as Weight))
+	}
+}
\ No newline at end of file