1 of 9

Polkadot

Architecture

Polkadot Protocol + NFT-Kit Integration Diagram

The NFT Kit is responsible for fetching NFTs and their details from Polkadot. We have three main components:

REST APIs/Library: you can access the functionalities provided by the NFT Kit through two interfaces: as a library or through REST APIs.
NFTs operation: within this component, we will have a list of NFTs operations like fetching NFT metadata, a list of NFTs, verify NFT ownership/metadata against policies.
NFTs queries: this component generates a query and routes it to the specific ecosystem based on the demand of the NFTs operation component.

Different approaches to managing NFTs in the Polkadot ecosystem include PSP-34, PSP-37, RMRK, Uniques, etc. The NFT Kit provides an abstract layer for operations with any NFTs approach within the Polkadot ecosystem. With the NFT Kit, the NFTs ecosystem in Polkadot will be more accessible to developers to build more advanced use cases.

RMRK 2.0

RMRK is a set of NFT standards which compose several "NFT 2.0 lego" primitives. Putting these legos together allows a user to create NFT systems of arbitrary complexity.
Our solution will be integrated with Kusama canary network Implementation (Remarks).

Uniques

Unique Network is the next generation NFT chain for advanced use cases and mass adoption.
Unique provides REST APIs to query NFTs details in the Unique Network.
Unique has three networks:

Unique is a Polkadot parachain.
Quartz is a Kusama parachain.
Opal is a testnet.

Astar

Astar Network supports the building of dApps with EVM and WASM smart contracts and offers developers true interoperability.
Astar supports EVM smart contracts.
It enables Wasm smart-contract using The pallet-contracts. The pallet-contracts is a sandbox environment to deploy and execute WebAssembly smart contracts. Any language that compiles to Wasm can be used. But the code should be compatible with the pallet-contracts API.
The Polkadot ecosystem provides two standard interfaces for Non-Fungible Token: PSP-34(Non-Fungible Token (ERC721 equivalent) with extensions) and PSP37( ERC1155 equivalent with extensions). The goal is to have a standard contract interface that allows tokens deployed on Substrate's contracts pallet.

Blockscout: BlockScout provides a comprehensive, easy-to-use interface for users to view, confirm, and inspect transactions on EVM blockchains
Subscan API: it provides a simple way to access the chain data of more than 10 substrate-based networks.
Unique REST APIs
Subsquid: A squid is a project that extracts and transforms on-chain data in order to present it as a GraphQL API.
Polkaholic API: It gives you powerful access to over 50+ networks in Polkadot and Kusama ecosystems.
Substrate API Sidecar: REST service that makes it easy to interact with blockchain nodes built using Substrate's FRAME framework.

Query NFTs

Unique network

Fetching Token id & Collection id

With this API , you can return the list of token ids and collection ids for a given account

API Doc

Swagger Doc | ReDoc

Curl call example

Path parameters:

Network:[string] chain to work with. Either UNIQUE or OPAL .
account : your account.

Example:

Fetching NFT metadata

With this API , you can return the list of NFTs on unique network.

API Doc

Swagger Doc | ReDoc

Curl call example

Path parameters:

chain:[string] chain to work with. Either UNIQUE or OPAL .
collectionId : the collection id on the network.
tokenId : NFT token id

Example:

Parachain Networks

Fetching Tokens by subscan

With this API , you can return the list of tokens by subscan.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/parachain/{chain}/account/{account}"
-H  "Content-Type: application/json"

Path parameters:

Chain:[string] chain to work with. Either MOONBEAM or ASTAR .
account : your account.

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/parachain/MOONBEAM/account/0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830"
-H  "Content-Type: application/json"

Fetching EVM ERC721 Collectibles by subscan

With this API , you can return the list of NFTs on unique network.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/parachain/{chain}/account/{account}/EvmErc721"
-H  "Content-Type: application/json"

Path parameters:

Chain:[string] chain to work with. Either MOONBEAM or ASTAR .
account : your account.

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/parachain/ASTAR/account/0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830/EvmErc721
"
-H  "Content-Type: application/json"

NFT | Ownership Verification

NFT ownership verification

You can use this API to verify if an account is the real owner of an NFT.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/{{chain}}/contract/{{contract}}/verifyNftOwnership?account={{account}}&tokenId={{tokenId}}" 
-H  "accept: application/json"

Path parameters:

chain: [string] chain to work with. Either ASTAR, MOONBEAM, UNIQUE, OPAL.
contract: [string] smart contract address.

Query parameters:

account: [string] owner of the NFT.
tokenId: [string] token id of the NFT

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/MOONBEAM/contract/0x41Ee4762421d659C1525D04B41CB740e9E262b21/verifyNftOwnership?account=0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830&tokenId=7" 
-H  "accept: application/json"

NFT ownership verification within a collection

We use this API to verify that an account has a NFT within a particular collection.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/{{chain}}/contract/{{contract}}/verifyNftOwnershipWithinCollection?account={{account}}" 
-H  "accept: application/json"

Path parameters:

chain: [string] chain to work with. Either ASTAR, MOONBEAM, UNIQUE, OPAL.
contract: [string] smart contract address.

Query parameters:

account: [string] owner of the NFT.

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/MOONBEAM/contract/0x41Ee4762421d659C1525D04B41CB740e9E262b21/verifyNftOwnershipWithinCollection?account=0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830" 
-H  "accept: application/json"

NFT ownership verification with traits

You can use this API to verify if an account is the real owner of an NFT existed in Polkadot blockchain with NFT property verification.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/{{chain}}/contract/{{contract}}/verifyNftOwnershipWithTraits?account={{account}}&tokenId={{tokenId}}&traitType={{traitType}}&traitValue={{traitValue}}"
-H  "accept: application/json"

Path parameters:

chain: [string] chain to work with. Either ASTAR, MOONBEAM, UNIQUE, OPAL.
contract: [string] smart contract address.

Query parameters:

account: [string] owner of the NFT.
tokenId: [string] token id of the NFT
traitType: [string] name of the property you want to verify
tokenId: [string] value of the property you want to verify

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/MOONBEAM/contract/0x41Ee4762421d659C1525D04B41CB740e9E262b21/verifyNftOwnershipWithTraits?account=0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830&tokenId=7&traitType=trait&traitValue=value"
-H  "accept: application/json"

NFT | Wallet

Using our , you can fetch and list your NFTs on Polkadot blockchain.

Installation :

1 - Download waltid web wallet :

2 - Build Setup :

Polkadot parachains

Using our , you can fetch and list your NFTs on Polkadot chains.

Usage :

Step1: Click on "Connect Polkadot wallet" button:

Step 2: Allow connection to the application.

Step 3 : You will have the list of NFTs on the selected Network.

Step 4 : You can display NFT details .

Polkadot EVM compatible parachains

Using our , you can fetch and list your NFTs on Polkadot EVM compatible chains.

Usage :

Step1: Click on "Connect Polkadot (EVM)" button.

Step 2: Allow connection to the application.

Step 3 : You will have the list of NFTs on the selected Network.

Architecture

Polkadot Protocol + NFT-Kit Integration Diagram

The NFT Kit is responsible for fetching NFTs and their details from Polkadot. We have three main components:

REST APIs/Library: you can access the functionalities provided by the NFT Kit through two interfaces: as a library or through REST APIs.
NFTs operation: within this component, we will have a list of NFTs operations like fetching NFT metadata, a list of NFTs, verify NFT ownership/metadata against policies.
NFTs queries: this component generates a query and routes it to the specific ecosystem based on the demand of the NFTs operation component.

RMRK 2.0

RMRK is a set of NFT standards which compose several "NFT 2.0 lego" primitives. Putting these legos together allows a user to create NFT systems of arbitrary complexity.
Our solution will be integrated with Kusama canary network Implementation (Remarks).

Uniques

Unique Network is the next generation NFT chain for advanced use cases and mass adoption.
Unique provides REST APIs to query NFTs details in the Unique Network.
Unique has three networks:

Unique is a Polkadot parachain.
Quartz is a Kusama parachain.
Opal is a testnet.

Astar

Astar Network supports the building of dApps with EVM and WASM smart contracts and offers developers true interoperability.
Astar supports EVM smart contracts.
It enables Wasm smart-contract using The pallet-contracts. The pallet-contracts is a sandbox environment to deploy and execute WebAssembly smart contracts. Any language that compiles to Wasm can be used. But the code should be compatible with the pallet-contracts API.
The Polkadot ecosystem provides two standard interfaces for Non-Fungible Token: PSP-34(Non-Fungible Token (ERC721 equivalent) with extensions) and PSP37( ERC1155 equivalent with extensions). The goal is to have a standard contract interface that allows tokens deployed on Substrate's contracts pallet.

Blockscout: BlockScout provides a comprehensive, easy-to-use interface for users to view, confirm, and inspect transactions on EVM blockchains
Subscan API: it provides a simple way to access the chain data of more than 10 substrate-based networks.
Unique REST APIs
Subsquid: A squid is a project that extracts and transforms on-chain data in order to present it as a GraphQL API.
Polkaholic API: It gives you powerful access to over 50+ networks in Polkadot and Kusama ecosystems.
Substrate API Sidecar: REST service that makes it easy to interact with blockchain nodes built using Substrate's FRAME framework.

NFT | Ownership Verification

NFT ownership verification

You can use this API to verify if an account is the real owner of an NFT.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/{{chain}}/contract/{{contract}}/verifyNftOwnership?account={{account}}&tokenId={{tokenId}}" 
-H  "accept: application/json"

Path parameters:

chain: [string] chain to work with. Either ASTAR, MOONBEAM, UNIQUE, OPAL.
contract: [string] smart contract address.

Query parameters:

account: [string] owner of the NFT.
tokenId: [string] token id of the NFT

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/MOONBEAM/contract/0x41Ee4762421d659C1525D04B41CB740e9E262b21/verifyNftOwnership?account=0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830&tokenId=7" 
-H  "accept: application/json"

NFT ownership verification within a collection

We use this API to verify that an account has a NFT within a particular collection.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/{{chain}}/contract/{{contract}}/verifyNftOwnershipWithinCollection?account={{account}}" 
-H  "accept: application/json"

Path parameters:

chain: [string] chain to work with. Either ASTAR, MOONBEAM, UNIQUE, OPAL.
contract: [string] smart contract address.

Query parameters:

account: [string] owner of the NFT.

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/MOONBEAM/contract/0x41Ee4762421d659C1525D04B41CB740e9E262b21/verifyNftOwnershipWithinCollection?account=0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830" 
-H  "accept: application/json"

NFT ownership verification with traits

You can use this API to verify if an account is the real owner of an NFT existed in Polkadot blockchain with NFT property verification.

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/{{chain}}/contract/{{contract}}/verifyNftOwnershipWithTraits?account={{account}}&tokenId={{tokenId}}&traitType={{traitType}}&traitValue={{traitValue}}"
-H  "accept: application/json"

Path parameters:

chain: [string] chain to work with. Either ASTAR, MOONBEAM, UNIQUE, OPAL.
contract: [string] smart contract address.

Query parameters:

account: [string] owner of the NFT.
tokenId: [string] token id of the NFT
traitType: [string] name of the property you want to verify
tokenId: [string] value of the property you want to verify

Example:

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/chain/MOONBEAM/contract/0x41Ee4762421d659C1525D04B41CB740e9E262b21/verifyNftOwnershipWithTraits?account=0x2e3A8FAb541F188Eb2378a8a3720E6616fd38830&tokenId=7&traitType=trait&traitValue=value"
-H  "accept: application/json"