git.delta.rocks / unique-network / refs/commits / 509c8280fa0c

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5953,7 +5953,7 @@
 
 [[package]]
 name = "pallet-fungible"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "ethereum",
  "evm-coder",
@@ -6198,7 +6198,7 @@
 
 [[package]]
 name = "pallet-nonfungible"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "ethereum",
  "evm-coder",
@@ -12377,7 +12377,7 @@
 
 [[package]]
 name = "uc-rpc"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "anyhow",
  "jsonrpsee",
@@ -12682,7 +12682,7 @@
 
 [[package]]
 name = "unique-runtime-common"
-version = "0.9.24"
+version = "0.9.25"
 dependencies = [
  "evm-coder",
  "fp-rpc",
@@ -12754,7 +12754,7 @@
 
 [[package]]
 name = "up-rpc"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "pallet-common",
  "pallet-evm",

--- a/client/rpc/Cargo.toml
+++ b/client/rpc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uc-rpc"
-version = "0.1.0"
+version = "0.1.1"
 license = "GPLv3"
 edition = "2021"
 

--- a/client/rpc/src/lib.rs
+++ b/client/rpc/src/lib.rs
@@ -70,6 +70,16 @@
 		token: TokenId,
 		at: Option<BlockHash>,
 	) -> Result<Option<CrossAccountId>>;
+
+	/// Returns 10 tokens owners in no particular order.
+	#[method(name = "unique_tokenOwners")]
+	fn token_owners(
+		&self,
+		collection: CollectionId,
+		token: TokenId,
+		at: Option<BlockHash>,
+	) -> Result<Vec<CrossAccountId>>;
+
 	#[method(name = "unique_topmostTokenOwner")]
 	fn topmost_token_owner(
 		&self,
@@ -473,6 +483,7 @@
 	pass_method!(next_sponsored(collection: CollectionId, account: CrossAccountId, token: TokenId) -> Option<u64>, unique_api);
 	pass_method!(effective_collection_limits(collection_id: CollectionId) -> Option<CollectionLimits>, unique_api);
 	pass_method!(total_pieces(collection_id: CollectionId, token_id: TokenId) -> Option<u128>, unique_api);
+	pass_method!(token_owners(collection: CollectionId, token: TokenId) -> Vec<CrossAccountId>, unique_api);
 }
 
 #[allow(deprecated)]

--- a/pallets/common/src/lib.rs
+++ b/pallets/common/src/lib.rs
@@ -1748,6 +1748,11 @@
 	/// * `token` - The token for which you need to find out the owner.
 	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;
 
+	/// Returns 10 tokens owners in no particular order.
+	///
+	/// * `token` - The token for which you need to find out the owners.
+	fn token_owners(&self, token: TokenId) -> Vec<T::CrossAccountId>;
+
 	/// Get the value of the token property by key.
 	///
 	/// * `token` - Token with the property to get.

--- a/pallets/fungible/Cargo.toml
+++ b/pallets/fungible/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pallet-fungible"
-version = "0.1.0"
+version = "0.1.1"
 license = "GPLv3"
 edition = "2021"
 

--- a/pallets/fungible/src/common.rs
+++ b/pallets/fungible/src/common.rs
@@ -362,6 +362,11 @@
 		None
 	}
 
+	/// Returns 10 tokens owners in no particular order.
+	fn token_owners(&self, token: TokenId) -> Vec<T::CrossAccountId> {
+		<Pallet<T>>::token_owners(self.id, token).unwrap_or_default()
+	}
+
 	fn token_property(&self, _token_id: TokenId, _key: &PropertyKey) -> Option<PropertyValue> {
 		None
 	}

--- a/pallets/fungible/src/lib.rs
+++ b/pallets/fungible/src/lib.rs
@@ -95,7 +95,7 @@
 use pallet_evm_coder_substrate::WithRecorder;
 use sp_core::H160;
 use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};
-use sp_std::{collections::btree_map::BTreeMap};
+use sp_std::{collections::btree_map::BTreeMap, vec::Vec};
 
 pub use pallet::*;
 
@@ -613,4 +613,26 @@
 			nesting_budget,
 		)
 	}
+
+	/// Returns 10 tokens owners in no particular order
+	///
+	/// There is no direct way to get token holders in ascending order,
+	/// since `iter_prefix` returns values in no particular order.
+	/// Therefore, getting the 10 largest holders with a large value of holders
+	/// can lead to impact memory allocation + sorting with  `n * log (n)`.
+	pub fn token_owners(
+		collection: CollectionId,
+		_token: TokenId,
+	) -> Option<Vec<T::CrossAccountId>> {
+		let res: Vec<T::CrossAccountId> = <Balance<T>>::iter_prefix((collection,))
+			.map(|(owner, _amount)| owner)
+			.take(10)
+			.collect();
+
+		if res.is_empty() {
+			None
+		} else {
+			Some(res)
+		}
+	}
 }

--- a/pallets/nonfungible/Cargo.toml
+++ b/pallets/nonfungible/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pallet-nonfungible"
-version = "0.1.0"
+version = "0.1.1"
 license = "GPLv3"
 edition = "2021"
 

--- a/pallets/nonfungible/src/common.rs
+++ b/pallets/nonfungible/src/common.rs
@@ -26,7 +26,7 @@
 	weights::WeightInfo as _,
 };
 use sp_runtime::DispatchError;
-use sp_std::vec::Vec;
+use sp_std::{vec::Vec, vec};
 
 use crate::{
 	AccountBalance, Allowance, Config, CreateItemData, Error, NonfungibleHandle, Owned, Pallet,
@@ -422,6 +422,11 @@
 		<TokenData<T>>::get((self.id, token)).map(|t| t.owner)
 	}
 
+	/// Returns token owners.
+	fn token_owners(&self, token: TokenId) -> Vec<T::CrossAccountId> {
+		self.token_owner(token).map_or_else(|| vec![], |t| vec![t])
+	}
+
 	fn token_property(&self, token_id: TokenId, key: &PropertyKey) -> Option<PropertyValue> {
 		<Pallet<T>>::token_properties((self.id, token_id))
 			.get(key)

--- a/pallets/refungible/CHANGELOG.md
+++ b/pallets/refungible/CHANGELOG.md
@@ -1,6 +1,18 @@
-## v0.1.2 - 2022-07
+# Change Log
 
-### Refungible Pallet
+All notable changes to this project will be documented in this file.
 
+## [v0.1.2] - 2022-07-14
+
+### Other changes
+
 feat(refungible-pallet): add ERC-20 EVM API for RFT token pieces ([#413](https://github.com/UniqueNetwork/unique-chain/pull/413))
-test(refungible-pallet): add tests for ERC-20 EVM API for RFT token pieces ([#413](https://github.com/UniqueNetwork/unique-chain/pull/413))
\ No newline at end of file
+test(refungible-pallet): add tests for ERC-20 EVM API for RFT token pieces ([#413](https://github.com/UniqueNetwork/unique-chain/pull/413))
+
+## [v0.1.1] - 2022-07-14
+
+### Other changes
+
+- feat: RPC method `token_owners` returning 10 owners in no particular order.
+
+This was an internal request to improve the web interface and support fractionalization event. 

--- a/pallets/refungible/src/common.rs
+++ b/pallets/refungible/src/common.rs
@@ -438,6 +438,11 @@
 		<Pallet<T>>::token_owner(self.id, token)
 	}
 
+	/// Returns 10 token in no particular order.
+	fn token_owners(&self, token: TokenId) -> Vec<T::CrossAccountId> {
+		<Pallet<T>>::token_owners(self.id, token).unwrap_or_default()
+	}
+
 	fn token_property(&self, _token_id: TokenId, _key: &PropertyKey) -> Option<PropertyValue> {
 		None
 	}

--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -1235,4 +1235,26 @@
 	) -> DispatchResult {
 		<PalletCommon<T>>::set_token_property_permissions(collection, sender, property_permissions)
 	}
+
+	/// Returns 10 token in no particular order.
+	///
+	/// There is no direct way to get token holders in ascending order,
+	/// since `iter_prefix` returns values in no particular order.
+	/// Therefore, getting the 10 largest holders with a large value of holders
+	/// can lead to impact memory allocation + sorting with  `n * log (n)`.
+	pub fn token_owners(
+		collection_id: CollectionId,
+		token: TokenId,
+	) -> Option<Vec<T::CrossAccountId>> {
+		let res: Vec<T::CrossAccountId> = <Balance<T>>::iter_prefix((collection_id, token))
+			.map(|(owner, _amount)| owner)
+			.take(10)
+			.collect();
+
+		if res.is_empty() {
+			None
+		} else {
+			Some(res)
+		}
+	}
 }

--- a/primitives/rpc/Cargo.toml
+++ b/primitives/rpc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "up-rpc"
-version = "0.1.0"
+version = "0.1.1"
 license = "GPLv3"
 edition = "2021"
 

--- a/primitives/rpc/src/lib.rs
+++ b/primitives/rpc/src/lib.rs
@@ -81,5 +81,6 @@
 		fn next_sponsored(collection: CollectionId, account: CrossAccountId, token: TokenId) -> Result<Option<u64>>;
 		fn effective_collection_limits(collection_id: CollectionId) -> Result<Option<CollectionLimits>>;
 		fn total_pieces(collection_id: CollectionId, token_id: TokenId) -> Result<Option<u128>>;
+		fn token_owners(collection: CollectionId, token: TokenId) -> Result<Vec<CrossAccountId>>;
 	}
 }

--- a/runtime/common/src/runtime_apis.rs
+++ b/runtime/common/src/runtime_apis.rs
@@ -40,6 +40,11 @@
                 fn token_owner(collection: CollectionId, token: TokenId) -> Result<Option<CrossAccountId>, DispatchError> {
                     dispatch_unique_runtime!(collection.token_owner(token))
                 }
+
+                fn token_owners(collection: CollectionId, token: TokenId) -> Result<Vec::<CrossAccountId>, DispatchError>  {
+                   dispatch_unique_runtime!(collection.token_owners(token))
+                }
+
                 fn topmost_token_owner(collection: CollectionId, token: TokenId) -> Result<Option<CrossAccountId>, DispatchError> {
                     let budget = up_data_structs::budget::Value::new(10);
 

--- a/tests/package.json
+++ b/tests/package.json
@@ -80,6 +80,8 @@
     "testLimits": "mocha --timeout 9999999 -r ts-node/register ./**/limits.test.ts",
     "testEthCreateCollection": "mocha --timeout 9999999 -r ts-node/register ./**/eth/createCollection.test.ts",
     "testRFT": "mocha --timeout 9999999 -r ts-node/register ./**/refungible.test.ts",
+    "testFT": "mocha --timeout 9999999 -r ts-node/register ./**/fungible.test.ts",
+    "testRPC": "mocha --timeout 9999999 -r ts-node/register ./**/rpc.test.ts",
     "polkadot-types-fetch-metadata": "curl -H 'Content-Type: application/json' -d '{\"id\":\"1\", \"jsonrpc\":\"2.0\", \"method\": \"state_getMetadata\", \"params\":[]}' http://localhost:9933 > src/interfaces/metadata.json",
     "polkadot-types-from-defs": "ts-node ./node_modules/.bin/polkadot-types-from-defs --endpoint src/interfaces/metadata.json --input src/interfaces/ --package .",
     "polkadot-types-from-chain": "ts-node ./node_modules/.bin/polkadot-types-from-chain --endpoint src/interfaces/metadata.json --output src/interfaces/ --package .",

--- a/tests/src/interfaces/augment-api-events.ts
+++ b/tests/src/interfaces/augment-api-events.ts
@@ -59,82 +59,47 @@
     };
     common: {
       /**
-       * * collection_id
-       * 
-       * * item_id
-       * 
-       * * sender
-       * 
-       * * spender
-       * 
-       * * amount
+       * Amount pieces of token owned by `sender` was approved for `spender`.
        **/
       Approved: AugmentedEvent<ApiType, [u32, u32, PalletEvmAccountBasicCrossAccountIdRepr, PalletEvmAccountBasicCrossAccountIdRepr, u128]>;
       /**
        * New collection was created
-       * 
-       * # Arguments
-       * 
-       * * collection_id: Globally unique identifier of newly created collection.
-       * 
-       * * mode: [CollectionMode] converted into u8.
-       * 
-       * * account_id: Collection owner.
        **/
       CollectionCreated: AugmentedEvent<ApiType, [u32, u8, AccountId32]>;
       /**
        * New collection was destroyed
-       * 
-       * # Arguments
-       * 
-       * * collection_id: Globally unique identifier of collection.
        **/
       CollectionDestroyed: AugmentedEvent<ApiType, [u32]>;
+      /**
+       * The property has been deleted.
+       **/
       CollectionPropertyDeleted: AugmentedEvent<ApiType, [u32, Bytes]>;
+      /**
+       * The colletion property has been set.
+       **/
       CollectionPropertySet: AugmentedEvent<ApiType, [u32, Bytes]>;
       /**
        * New item was created.
-       * 
-       * # Arguments
-       * 
-       * * collection_id: Id of the collection where item was created.
-       * 
-       * * item_id: Id of an item. Unique within the collection.
-       * 
-       * * recipient: Owner of newly created item
-       * 
-       * * amount: Always 1 for NFT
        **/
       ItemCreated: AugmentedEvent<ApiType, [u32, u32, PalletEvmAccountBasicCrossAccountIdRepr, u128]>;
       /**
        * Collection item was burned.
-       * 
-       * # Arguments
-       * 
-       * * collection_id.
-       * 
-       * * item_id: Identifier of burned NFT.
-       * 
-       * * owner: which user has destroyed its tokens
-       * 
-       * * amount: Always 1 for NFT
        **/
       ItemDestroyed: AugmentedEvent<ApiType, [u32, u32, PalletEvmAccountBasicCrossAccountIdRepr, u128]>;
+      /**
+       * The colletion property permission has been set.
+       **/
       PropertyPermissionSet: AugmentedEvent<ApiType, [u32, Bytes]>;
+      /**
+       * The token property has been deleted.
+       **/
       TokenPropertyDeleted: AugmentedEvent<ApiType, [u32, u32, Bytes]>;
+      /**
+       * The token property has been set.
+       **/
       TokenPropertySet: AugmentedEvent<ApiType, [u32, u32, Bytes]>;
       /**
        * Item was transferred
-       * 
-       * * collection_id: Id of collection to which item is belong
-       * 
-       * * item_id: Id of an item
-       * 
-       * * sender: Original owner of item
-       * 
-       * * recipient: New owner of item
-       * 
-       * * amount: Always 1 for NFT
        **/
       Transfer: AugmentedEvent<ApiType, [u32, u32, PalletEvmAccountBasicCrossAccountIdRepr, PalletEvmAccountBasicCrossAccountIdRepr, u128]>;
       /**

--- a/tests/src/interfaces/augment-api-query.ts
+++ b/tests/src/interfaces/augment-api-query.ts
@@ -69,24 +69,36 @@
       [key: string]: QueryableStorageEntry<ApiType>;
     };
     common: {
+      /**
+       * Storage of collection admins count.
+       **/
       adminAmount: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<u32>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
       /**
        * Allowlisted collection users
        **/
       allowlist: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: PalletEvmAccountBasicCrossAccountIdRepr | { Substrate: any } | { Ethereum: any } | string | Uint8Array) => Observable<bool>, [u32, PalletEvmAccountBasicCrossAccountIdRepr]> & QueryableStorageEntry<ApiType, [u32, PalletEvmAccountBasicCrossAccountIdRepr]>;
       /**
-       * Collection info
+       * Storage of collection info.
        **/
       collectionById: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<Option<UpDataStructsCollection>>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
       /**
-       * Collection properties
+       * Storage of collection properties.
        **/
       collectionProperties: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<UpDataStructsProperties>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
+      /**
+       * Storage of collection properties permissions.
+       **/
       collectionPropertyPermissions: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<BTreeMap<Bytes, UpDataStructsPropertyPermission>>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
+      /**
+       * Storage of the count of created collections.
+       **/
       createdCollectionCount: AugmentedQuery<ApiType, () => Observable<u32>, []> & QueryableStorageEntry<ApiType, []>;
+      /**
+       * Storage of the count of deleted collections.
+       **/
       destroyedCollectionCount: AugmentedQuery<ApiType, () => Observable<u32>, []> & QueryableStorageEntry<ApiType, []>;
       /**
-       * Not used by code, exists only to provide some types to metadata
+       * Not used by code, exists only to provide some types to metadata.
        **/
       dummyStorageValue: AugmentedQuery<ApiType, () => Observable<Option<ITuple<[UpDataStructsCollectionStats, u32, u32, UpDataStructsTokenChild, PhantomTypeUpDataStructs]>>>, []> & QueryableStorageEntry<ApiType, []>;
       /**
@@ -231,20 +243,42 @@
       [key: string]: QueryableStorageEntry<ApiType>;
     };
     nonfungible: {
+      /**
+       * Amount of tokens owned by account.
+       **/
       accountBalance: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: PalletEvmAccountBasicCrossAccountIdRepr | { Substrate: any } | { Ethereum: any } | string | Uint8Array) => Observable<u32>, [u32, PalletEvmAccountBasicCrossAccountIdRepr]> & QueryableStorageEntry<ApiType, [u32, PalletEvmAccountBasicCrossAccountIdRepr]>;
+      /**
+       * Allowance set by an owner for a spender for a token.
+       **/
       allowance: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array) => Observable<Option<PalletEvmAccountBasicCrossAccountIdRepr>>, [u32, u32]> & QueryableStorageEntry<ApiType, [u32, u32]>;
       /**
-       * Used to enumerate tokens owned by account
+       * Used to enumerate tokens owned by account.
        **/
       owned: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: PalletEvmAccountBasicCrossAccountIdRepr | { Substrate: any } | { Ethereum: any } | string | Uint8Array, arg3: u32 | AnyNumber | Uint8Array) => Observable<bool>, [u32, PalletEvmAccountBasicCrossAccountIdRepr, u32]> & QueryableStorageEntry<ApiType, [u32, PalletEvmAccountBasicCrossAccountIdRepr, u32]>;
+      /**
+       * Custom data that is serialized to bytes and attached to a token property.
+       * Currently used to store RMRK data.
+       **/
       tokenAuxProperties: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array, arg3: UpDataStructsPropertyScope | 'None' | 'Rmrk' | number | Uint8Array, arg4: Bytes | string | Uint8Array) => Observable<Option<Bytes>>, [u32, u32, UpDataStructsPropertyScope, Bytes]> & QueryableStorageEntry<ApiType, [u32, u32, UpDataStructsPropertyScope, Bytes]>;
       /**
-       * Used to enumerate token's children
+       * Used to enumerate token's children.
        **/
       tokenChildren: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array, arg3: ITuple<[u32, u32]> | [u32 | AnyNumber | Uint8Array, u32 | AnyNumber | Uint8Array]) => Observable<bool>, [u32, u32, ITuple<[u32, u32]>]> & QueryableStorageEntry<ApiType, [u32, u32, ITuple<[u32, u32]>]>;
+      /**
+       * Custom data serialized to bytes for token.
+       **/
       tokenData: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array) => Observable<Option<PalletNonfungibleItemData>>, [u32, u32]> & QueryableStorageEntry<ApiType, [u32, u32]>;
+      /**
+       * Key-Value map stored for token.
+       **/
       tokenProperties: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array) => Observable<UpDataStructsProperties>, [u32, u32]> & QueryableStorageEntry<ApiType, [u32, u32]>;
+      /**
+       * Amount of burnt tokens for collection.
+       **/
       tokensBurnt: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<u32>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
+      /**
+       * Amount of tokens minted for collection.
+       **/
       tokensMinted: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<u32>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
       /**
        * Generic query
@@ -430,6 +464,9 @@
        **/
       tokenData: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array) => Observable<PalletRefungibleItemData>, [u32, u32]> & QueryableStorageEntry<ApiType, [u32, u32]>;
       tokenProperties: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: u32 | AnyNumber | Uint8Array) => Observable<UpDataStructsProperties>, [u32, u32]> & QueryableStorageEntry<ApiType, [u32, u32]>;
+      /**
+       * Amount of burnt tokens for collection
+       **/
       tokensBurnt: AugmentedQuery<ApiType, (arg: u32 | AnyNumber | Uint8Array) => Observable<u32>, [u32]> & QueryableStorageEntry<ApiType, [u32]>;
       /**
        * Amount of tokens minted for collection

--- a/tests/src/interfaces/augment-api-rpc.ts
+++ b/tests/src/interfaces/augment-api-rpc.ts
@@ -709,6 +709,10 @@
        **/
       tokenOwner: AugmentedRpc<(collection: u32 | AnyNumber | Uint8Array, tokenId: u32 | AnyNumber | Uint8Array, at?: Hash | string | Uint8Array) => Observable<Option<PalletEvmAccountBasicCrossAccountIdRepr>>>;
       /**
+       * Returns 10 tokens owners in no particular order
+       **/
+      tokenOwners: AugmentedRpc<(collection: u32 | AnyNumber | Uint8Array, tokenId: u32 | AnyNumber | Uint8Array, at?: Hash | string | Uint8Array) => Observable<Vec<PalletEvmAccountBasicCrossAccountIdRepr>>>;
+      /**
        * Get token properties
        **/
       tokenProperties: AugmentedRpc<(collection: u32 | AnyNumber | Uint8Array, tokenId: u32 | AnyNumber | Uint8Array, propertyKeys?: Vec<Text> | (Text | string)[], at?: Hash | string | Uint8Array) => Observable<Vec<UpDataStructsProperty>>>;

--- a/tests/src/interfaces/unique/definitions.ts
+++ b/tests/src/interfaces/unique/definitions.ts
@@ -49,6 +49,7 @@
     balance: fun('Get amount of specific account token', [collectionParam, crossAccountParam(), tokenParam], 'u128'),
     allowance: fun('Get allowed amount', [collectionParam, crossAccountParam('sender'), crossAccountParam('spender'), tokenParam], 'u128'),
     tokenOwner: fun('Get token owner', [collectionParam, tokenParam], `Option<${CROSS_ACCOUNT_ID_TYPE}>`),
+    tokenOwners: fun('Returns 10 tokens owners in no particular order', [collectionParam, tokenParam], `Vec<${CROSS_ACCOUNT_ID_TYPE}>`),
     topmostTokenOwner: fun('Get token owner, in case of nested token - find parent recursive', [collectionParam, tokenParam], `Option<${CROSS_ACCOUNT_ID_TYPE}>`),
     tokenChildren: fun('Get tokens nested directly into the token', [collectionParam, tokenParam], 'Vec<UpDataStructsTokenChild>'),
     constMetadata: fun('Get token constant metadata', [collectionParam, tokenParam], 'Vec<u8>'),

--- a/tests/src/refungible.test.ts
+++ b/tests/src/refungible.test.ts
@@ -32,6 +32,8 @@
   repartitionRFT,
   createCollectionWithPropsExpectSuccess,
   getDetailedCollectionInfo,
+  normalizeAccountId,
+  CrossAccountId,
   getCreateItemsResult,
   getDestroyItemsResult,
 } from './util/helpers';
@@ -55,14 +57,14 @@
   it('Create refungible collection and token', async () => {
     await usingApi(async api => {
       const createCollectionResult = await createCollection(api, alice, {mode: {type: 'ReFungible'}});
-      expect(createCollectionResult.success).to.be.true;    
+      expect(createCollectionResult.success).to.be.true;
       const collectionId  = createCollectionResult.collectionId;
-
+      
       const itemCountBefore = await getLastTokenId(api, collectionId);
       const result = await createRefungibleToken(api, alice, collectionId, 100n);
-
+      
       const itemCountAfter = await getLastTokenId(api, collectionId);
-
+      
       // What to expect
       // tslint:disable-next-line:no-unused-expression
       expect(result.success).to.be.true;
@@ -71,7 +73,43 @@
       expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());
     });
   });
-
+  
+  it('RPC method tokenOnewrs for refungible collection and token', async () => {
+    await usingApi(async (api, privateKeyWrapper) => {
+      const ethAcc = {Ethereum: '0x67fb3503a61b284dc83fa96dceec4192db47dc7c'};
+      const facelessCrowd = Array.from(Array(7).keys()).map(i => normalizeAccountId(privateKeyWrapper(i.toString())));
+      
+      const createCollectionResult = await createCollection(api, alice, {mode: {type: 'ReFungible'}});
+      const collectionId = createCollectionResult.collectionId;
+      
+      const result = await createRefungibleToken(api, alice, collectionId, 10_000n);
+      const aliceTokenId = result.itemId;
+      
+      
+      await transfer(api, collectionId, aliceTokenId, alice, bob, 1000n);
+      await transfer(api, collectionId, aliceTokenId, alice, ethAcc, 900n);
+      
+      for (let i = 0; i < 7; i++) {
+        await transfer(api, collectionId, aliceTokenId, alice, facelessCrowd[i], 50*(i+1));
+      } 
+      
+      const owners = await api.rpc.unique.tokenOwners(collectionId, aliceTokenId);
+      const ids = (owners.toJSON() as CrossAccountId[]).map(s => normalizeAccountId(s));
+      
+      const aliceID = normalizeAccountId(alice);
+      const bobId = normalizeAccountId(bob);
+      
+      // What to expect
+      // tslint:disable-next-line:no-unused-expression
+      expect(ids).to.deep.include.members([aliceID, ethAcc, bobId, ...facelessCrowd]);
+      expect(owners.length).to.be.equal(10);
+      
+      const eleven = privateKeyWrapper('11');
+      expect(await transfer(api, collectionId, aliceTokenId, alice, eleven, 10n)).to.be.true;
+      expect((await api.rpc.unique.tokenOwners(collectionId, aliceTokenId)).length).to.be.equal(10);
+    });
+  });
+  
   it('Transfer token pieces', async () => {
     await usingApi(async api => {
       const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;

--- a/tests/src/rpc.test.ts
+++ b/tests/src/rpc.test.ts
@@ -1,12 +1,57 @@
+import {IKeyringPair} from '@polkadot/types/types';
 import {expect} from 'chai';
 import usingApi from './substrate/substrate-api';
-import {createCollectionExpectSuccess, getTokenOwner} from './util/helpers';
+import {createCollection, createCollectionExpectSuccess, createFungibleItemExpectSuccess, CrossAccountId, getTokenOwner, normalizeAccountId, transfer, U128_MAX} from './util/helpers';
+
+let alice: IKeyringPair;
+let bob: IKeyringPair;
 
-describe('getTokenOwner', () => {
+
+describe('integration test: RPC methods', () => {
+  before(async () => {
+    await usingApi(async (api, privateKeyWrapper) => {
+      alice = privateKeyWrapper('//Alice');
+      bob = privateKeyWrapper('//Bob');
+    });
+  });
+
+  
   it('returns None for fungible collection', async () => {
     await usingApi(async api => {
       const collection = await createCollectionExpectSuccess({mode: {type: 'Fungible', decimalPoints: 0}});
       await expect(getTokenOwner(api, collection, 0)).to.be.rejectedWith(/^owner == null$/);
     });
   });
+  
+  it('RPC method tokenOwners for fungible collection and token', async () => {
+    await usingApi(async (api, privateKeyWrapper) => {
+      const ethAcc = {Ethereum: '0x67fb3503a61b284dc83fa96dceec4192db47dc7c'};
+      const facelessCrowd = Array.from(Array(7).keys()).map(i => normalizeAccountId(privateKeyWrapper(i.toString())));
+      
+      const createCollectionResult = await createCollection(api, alice, {mode: {type: 'Fungible', decimalPoints: 0}});
+      const collectionId = createCollectionResult.collectionId;
+      const aliceTokenId = await createFungibleItemExpectSuccess(alice, collectionId, {Value: U128_MAX}, alice.address);
+     
+      await transfer(api, collectionId, aliceTokenId, alice, bob, 1000n);
+      await transfer(api, collectionId, aliceTokenId, alice, ethAcc, 900n);
+            
+      for (let i = 0; i < 7; i++) {
+        await transfer(api, collectionId, aliceTokenId, alice, facelessCrowd[i], 1);
+      } 
+      
+      const owners = await api.rpc.unique.tokenOwners(collectionId, aliceTokenId);
+      const ids = (owners.toJSON() as CrossAccountId[]).map(s => normalizeAccountId(s));
+      const aliceID = normalizeAccountId(alice);
+      const bobId = normalizeAccountId(bob);
+
+      // What to expect
+      // tslint:disable-next-line:no-unused-expression
+      expect(ids).to.deep.include.members([aliceID, ethAcc, bobId, ...facelessCrowd]);
+      expect(owners.length == 10).to.be.true;
+      
+      const eleven = privateKeyWrapper('11');
+      expect(await transfer(api, collectionId, aliceTokenId, alice, eleven, 10n)).to.be.true;
+      expect((await api.rpc.unique.tokenOwners(collectionId, aliceTokenId)).length).to.be.equal(10);
+    });
+  });
 });
\ No newline at end of file