View-Only chain extension for pallet-uniques

Cargo.toml

@@ -18,6 +18,7 @@ members = [
 	"chain-extensions/pallet-assets",
 	"chain-extensions/xvm",
 	"chain-extensions/unified-accounts",
+	"chain-extensions/pallet-uniques",
 	"chain-extensions/types/*",
 
 	"vendor/evm-tracing",
@@ -301,10 +302,12 @@ pallet-evm-precompile-unified-accounts = { path = "./precompiles/unified-account
 pallet-chain-extension-xvm = { path = "./chain-extensions/xvm", default-features = false }
 pallet-chain-extension-assets = { path = "./chain-extensions/pallet-assets", default-features = false }
 pallet-chain-extension-unified-accounts = { path = "./chain-extensions/unified-accounts", default-features = false }
+pallet-chain-extension-uniques = { path = "./chain-extensions/pallet-uniques", default-features = false }
 
 xvm-chain-extension-types = { path = "./chain-extensions/types/xvm", default-features = false }
 assets-chain-extension-types = { path = "./chain-extensions/types/assets", default-features = false }
 unified-accounts-chain-extension-types = { path = "./chain-extensions/types/unified-accounts", default-features = false }
+uniques-chain-extension-types = { path = "./chain-extensions/types/uniques", default-features = false }
 
 precompile-utils = { path = "./precompiles/utils", default-features = false }
 

chain-extensions/pallet-uniques/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+name = "pallet-chain-extension-uniques"
+version = "0.1.0"
+license = "Apache-2.0"
+description = "Uniques chain extension for WASM contracts"
+authors.workspace = true
+edition.workspace = true
+homepage.workspace = true
+repository.workspace = true
+
+[dependencies]
+uniques-chain-extension-types = { workspace = true }
+frame-support = { workspace = true }
+frame-system = { workspace = true }
+log = { workspace = true }
+num-traits = { workspace = true }
+pallet-uniques = { workspace = true }
+pallet-contracts = { workspace = true }
+pallet-contracts-primitives = { workspace = true }
+parity-scale-codec = { workspace = true }
+scale-info = { workspace = true }
+sp-core = { workspace = true }
+sp-runtime = { workspace = true }
+sp-std = { workspace = true }
+
+[features]
+default = ["std"]
+std = [
+	"parity-scale-codec/std",
+	"frame-support/std",
+	"frame-system/std",
+	"num-traits/std",
+	"pallet-contracts/std",
+	"pallet-contracts-primitives/std",
+	"scale-info/std",
+	"sp-std/std",
+	"sp-core/std",
+	"sp-runtime/std",
+	"pallet-uniques/std",
+	"uniques-chain-extension-types/std",
+]

chain-extensions/pallet-uniques/src/lib.rs

@@ -0,0 +1,211 @@
+// This file is part of Astar.
+
+// Copyright (C) 2019-2023 Stake Technologies Pte.Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// Astar 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.
+
+// Astar 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 Astar. If not, see <http://www.gnu.org/licenses/>.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+pub mod weights;
+
+use frame_support::traits::nonfungibles::{Inspect, InspectEnumerable};
+use pallet_contracts::chain_extension::{
+    ChainExtension, Environment, Ext, InitState, RetVal, SysConfig,
+};
+use parity_scale_codec::Encode;
+use sp_runtime::traits::StaticLookup;
+use sp_runtime::BoundedVec;
+use sp_runtime::DispatchError;
+use sp_std::marker::PhantomData;
+use sp_std::vec::Vec;
+use uniques_chain_extension_types::Outcome;
+
+type AccountIdLookup<T> = <<T as SysConfig>::Lookup as StaticLookup>::Source;
+
+enum UniquesFunc {
+    Owner,
+    CollectionOwner,
+    Attribute,
+    CollectionAttribute,
+    CanTransfer,
+    Collections,
+    Items,
+    Owned,
+    OwnedInCollection,
+}
+
+impl TryFrom<u16> for UniquesFunc {
+    type Error = DispatchError;
+
+    fn try_from(value: u16) -> Result<Self, Self::Error> {
+        match value {
+            1 => Ok(UniquesFunc::Owner),
+            2 => Ok(UniquesFunc::CollectionOwner),
+            3 => Ok(UniquesFunc::Attribute),
+            4 => Ok(UniquesFunc::CollectionAttribute),
+            5 => Ok(UniquesFunc::CanTransfer),
+            6 => Ok(UniquesFunc::Collections),
+            7 => Ok(UniquesFunc::Items),
+            8 => Ok(UniquesFunc::Owned),
+            9 => Ok(UniquesFunc::OwnedInCollection),
+            _ => Err(DispatchError::Other(
+                "Unimplemented func_id for UniquesFunc",
+            )),
+        }
+    }
+}
+
+/// Pallet Uniques chain extension.
+pub struct UniquesExtension<T, W>(PhantomData<(T, W)>);
+
+impl<T, W> Default for UniquesExtension<T, W> {
+    fn default() -> Self {
+        UniquesExtension(PhantomData)
+    }
+}
+
+impl<T, W> ChainExtension<T> for UniquesExtension<T, W>
+where
+    T: pallet_uniques::Config + pallet_contracts::Config,
+    AccountIdLookup<T>: From<<T as SysConfig>::AccountId>,
+    <T as SysConfig>::AccountId: From<[u8; 32]>,
+    W: weights::WeightInfo,
+{
+    fn call<E: Ext>(&mut self, env: Environment<E, InitState>) -> Result<RetVal, DispatchError>
+    where
+        E: Ext<T = T>,
+    {
+        let func_id = env.func_id().try_into()?;
+        let mut env = env.buf_in_buf_out();
+
+        match func_id {
+            UniquesFunc::Owner => {
+                let (collection_id, item): (
+                    <T as pallet_uniques::Config>::CollectionId,
+                    <T as pallet_uniques::Config>::ItemId,
+                ) = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::owner();
+                env.charge_weight(base_weight)?;
+
+                let owner = pallet_uniques::Pallet::<T>::owner(collection_id, item);
+                env.write(&owner.encode(), false, None)?;
+            }
+            UniquesFunc::CollectionOwner => {
+                let collection_id: <T as pallet_uniques::Config>::CollectionId = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::collection_owner();
+                env.charge_weight(base_weight)?;
+
+                let owner = pallet_uniques::Pallet::<T>::collection_owner(collection_id);
+                env.write(&owner.encode(), false, None)?;
+            }
+            UniquesFunc::Attribute => {
+                let (collection_id, item, key): (
+                    <T as pallet_uniques::Config>::CollectionId,
+                    <T as pallet_uniques::Config>::ItemId,
+                    BoundedVec<u8, <T as pallet_uniques::Config>::KeyLimit>,
+                ) = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::attribute();
+                env.charge_weight(base_weight)?;
+
+                let attribute = pallet_uniques::Pallet::<T>::attribute(&collection_id, &item, &key);
+                env.write(&attribute.encode(), false, None)?;
+            }
+            UniquesFunc::CollectionAttribute => {
+                let (collection_id, key): (
+                    <T as pallet_uniques::Config>::CollectionId,
+                    BoundedVec<u8, <T as pallet_uniques::Config>::KeyLimit>,
+                ) = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::collection_attribute();
+                env.charge_weight(base_weight)?;
+
+                let attribute =
+                    pallet_uniques::Pallet::<T>::collection_attribute(&collection_id, &key);
+                env.write(&attribute.encode(), false, None)?;
+            }
+            UniquesFunc::CanTransfer => {
+                let (collection_id, item): (
+                    <T as pallet_uniques::Config>::CollectionId,
+                    <T as pallet_uniques::Config>::ItemId,
+                ) = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::can_transfer();
+                env.charge_weight(base_weight)?;
+
+                let can_transfer = pallet_uniques::Pallet::<T>::can_transfer(&collection_id, &item);
+                env.write(&can_transfer.encode(), false, None)?;
+            }
+            UniquesFunc::Collections => {
+                let read_bound: u32 = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::collections(read_bound);
+                env.charge_weight(base_weight)?;
+
+                let collections: Vec<<T as pallet_uniques::Config>::CollectionId> =
+                    pallet_uniques::Pallet::<T>::collections().collect();
+
+                env.write(&collections.encode(), false, None)?;
+            }
+            UniquesFunc::Items => {
+                let (collection_id, read_bound): (
+                    <T as pallet_uniques::Config>::CollectionId,
+                    u32,
+                ) = env.read_as()?;
+
+                let base_weight = <W as weights::WeightInfo>::items(read_bound);
+                env.charge_weight(base_weight)?;
+
+                let items: Vec<<T as pallet_uniques::Config>::ItemId> =
+                    pallet_uniques::Pallet::<T>::items(&collection_id).collect();
+
+                env.write(&items.encode(), false, None)?;
+            }
+            UniquesFunc::Owned => {
+                let (who, read_bound): (T::AccountId, u32) = env.read_as()?;
+
+                let items: Vec<(
+                    <T as pallet_uniques::Config>::CollectionId,
+                    <T as pallet_uniques::Config>::ItemId,
+                )> = pallet_uniques::Pallet::<T>::owned(&who).collect();
+
+                let base_weight = <W as weights::WeightInfo>::owned(read_bound);
+                env.charge_weight(base_weight)?;
+
+                env.write(&items.encode(), false, None)?;
+            }
+            UniquesFunc::OwnedInCollection => {
+                let (who, collection_id, read_bound): (
+                    T::AccountId,
+                    <T as pallet_uniques::Config>::CollectionId,
+                    u32,
+                ) = env.read_as()?;
+
+                let items: Vec<<T as pallet_uniques::Config>::ItemId> =
+                    pallet_uniques::Pallet::<T>::owned_in_collection(&collection_id, &who)
+                        .collect();
+
+                let base_weight = <W as weights::WeightInfo>::owned_in_collection(read_bound);
+                env.charge_weight(base_weight)?;
+
+                env.write(&items.encode(), false, None)?;
+            }
+        }
+
+        Ok(RetVal::Converging(Outcome::Success as u32))
+    }
+}