[Accepted] XP.NETWORK Multi-Chain NFT Bridge

Grant Proposals NFT & Games
1

Proposal details

Project Name

[XPDIEM Foundation Ltd
3 FRASER STREET
#05-25 DUO TOWER
SINGAPORE
189352]

Project Type

[ Integrate IoTeX ]

Proposal Description

[ Our NFT Multi-chain bridge (https://bridge.xp.network) already connects Ethereum, BSC, Polygon, Avalanche, Algorand, Elrond, Tron, Fantom, xDai, Fuse. Tezos & Solana are developed and are waiting to be audited. We’ve recently received a grant for bridging Velas.]

Milestones

[ Split your project into milestones: each one must have its own verifiable deliverables]

  • Milestone 1:
    • Duration (weeks): 2 weeks
    • Deliverables: smart contracts adjustment to IoTeX token standards, building NFT Listing on IoTeX, Adding IoTeX to XPJS library, Updating relay validators for IoTeX
    • Funds request (USD): 17,500 USD
  • Milestone 2:
  • Duration (weeks): 2 weeks
  • Deliverables: Backens & Frontend. Integration of IoTeX in the:
    1. NFT Index Requires JWT
    2. TX Fee Estimator
    3. Crypto-currency converter
    4. Heartbeat - checks whether the IoTeX Node & validators areup and operating properly
    Integration of IoTeX in the:
    5. User Interface
    6. Wallets (Metamask, TrustWallet, WalletConnect)
    7. The basic tutorial that can interact with the deployed smart contracts and backend service.
  • Funds request (USD): 17,500 USD

Total funds requested

[ USD 35,000 ]

About your Team

[ XP.NETWORK · GitHub, LinkedIn Login, Sign in | LinkedIn ]

Metrics

[We expect hundreds or thousands of transactions per day once the NFT ecosystem is properly informed about the opportunities this integration brings]

Links

[https://bridge.xp.network]

=== Do not change this section ===

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=== Please add Milestone Reports below ===

IoTeX Grant Delivery

Project Name

XP Network Multi-Chain NFT Bridge

Project Type

NFT Infrastructure

Description

1.1 Bridge Architecture Overview

  • The first of the kind NFT multi-chain bridge connecting a wide range of EVM to a number of Non-EVM chains. The bridge allows transferring NFTs to and from:
    • Ethereum
    • Binance Smart Chain
    • Avalanche
    • Polygon
    • Algorand
    • Fantom
    • Tron
    • Tezos
    • Elrond
    • Gnosis Chain (former xDai)
    • Harmony
    • Aurora
    • Fuse

1.2 Tech stack

Bridge Component Stack
Smart Contracts Solidity, Rust, TEAL, Michelson
Validators (Oracles) TypeScript
Backend TypeScript
Frontend React (JSX, TypeScript)

1.3. Bridge Architecture

Bridge Architecture

2 Frontend

  1. Initial View of the Bridge
    Initial Page

  2. Departure / Destination chain list
    IoTeX Among Integrated Chains

3 Backend + Token Conversion Oracles

  1. Nft-Index (Returns a list of NFTs an account owns on a supported blockchain)
  2. Transaction Fee Estimator - provides the TX fee on the target chain
  3. Crypto-Currency Converter (Oracle) converts the target fee to the native tokens of the original chain via USDT equivalent.

4 Relay Validators (Oracles)

  1. Private (SK) & Public (PK) key pairs for all the connected chains
  2. Validation logic
    1. Chain Event catching
    2. Event deserialization
    3. Transaction composition
    4. Transaction submition to the target chain

=== Please add Milestone Reports below ===

5. Milestone Deliverables

Number Deliverable Specification
5.1 Documentation The basic tutorial that can interact with the deployed smart contracts and backend service can be found below.
5.2 Smart Contracts We have deployed smart contracts on IoTeX mainnet that are able to:
1. Support ERC-721 0x81e1Fdad0658b69914801aBaDA7Aa0Abb31653E5
2. Support ERC-1155 0xD87755CCeaab0edb28b3f0CD7D6405E1bB827B65
3. Bridge SC 0x4bA4ADdc803B04b71412439712cB1911103380D6
4. Freeze/Unfreeze Native NFTs in batches
5. Mint/Burn wrapped NFTs in batches
6. Pay the TX fees on the target chain in native tokens
7. Send / Receive NFTs in batches
8. Withdraw TX fees in the native tokens for the target chain
5.3 Backend Integration of IoTeX in the:
1. NFT Index Requires JWT
2. TX Fee Estimator
3. Crypto-currency converter
4. Heartbeat - checks whether the IoTeX Node & validators areup and operating properly
5.4 Frontend Integration of IoTeX in the:
1. User Interface
2. Wallets (Metamask, TrustWallet, WalletConnect)

5.6 Testnet Smart contracts

Contract Address
UserNftMinter 0xC3dB3dBcf007961541BE1ddF15cD4ECc0Fc758d5
Erc1155Minter 0x5df32A2F15D021DeF5086cF94fbCaC4594208A26
XPNft1155 0x941972fa041F507eBb8CfD5d11C05Eb1a51f2E95
XPNft 0x5D822bA2a0994434392A0f947C83310328CFB0DE
Minter 0xE657b66d683bF4295325c5E66F6bb0fb6D1F7551

6. Future Plans

Our long term plans include:

  1. Running a IoTeX Node for listening to the chain events and submitting bridge transactions
  2. Mainnet integration to Cardano, Solana, Polkadot ecosystem, Cosmos ecosystem, EOS compatible chains, NEO
  3. ERC-721A New smart contract support (allows minting and burning in batches)
  4. Forged NFT detection on all the bridged chains
  5. NFT explorer for finding NFT’s with deleted storage
  6. NFT meta backup to secure transactions
  7. Distributed NFT’s hosting (better than IPFS)
  8. NFT Search (search by any parameter)
  9. Retention protection tool

7. Proof Links & Screens

Sending from IoTeX to Ethereum:

Native NFT ID: 4847

IoTeX NFT on Ethereum in OpenSea:

https://opensea.io/https://github.com/XP-NETWORK/IoTeX-Grant-Delivery/blob/master/assets/0xc254a8d4ef5f825fd31561bdc69551ed2b8db134/30366210949921613079214926160

The Origin of the NFT: IoTeX

Chain nonce: 20 (nonce of IoTeX in the NFT Bridge)
The URI of the original on OpenSea links to the original NFT ID: 4847

8. Trying IoTeX in Testnet

8.1. Initiating a Node.js project

Initiate a JS/TS project

mkdir your_project
cd your_project/
yarn init -y

8.2. Installing the libraries

To test/use the latest commits of the library install directly from github

yarn add "git+https://github.com/xp-network/xpjs#bleeding-edge" @elrondnetwork/erdjs ethers @taquito/taquito @temple-wallet/dapp dotenv

8.3. Importing the Dependencies

import {
    ChainFactoryConfigs,  ChainFactory,
    ElrondHelper,         ElrondParams,
    TronHelper,           TronParams,
    Web3Helper,           Web3Params,
    AppConfigs,
    NftMintArgs,          Chain
} from "xp.network";
import {config} from 'dotenv';
config();
  
// Instantiate the chain factory for the TESTNET
const testnetConfig = ChainFactoryConfigs.TestNet();
const factory = ChainFactory(AppConfigs.TestNet(), testnetConfig);

6.4. Creating a signer object

Add a .env file and populate it with the Private Key of the signer

touch .env
echo "SK=<replace with your Provate Key>" >> .env

Add the signer object:

// EVM chains compatible wallet:
import { Wallet } from "ethers";
// EVM signer for testing in the BE
const signer = new Wallet(
  //  Private Key Of the Signer
  process.env.SK!,
  testnetConfig.iotexParams?.provider
);
// Print out your signer object to see that it matches the expected wallet
console.log("signer", signer);

8.5. Creating inner Blockchain objects

(async () => {
  
  // Inner Object ============= Chain Nonce == Chain Nonce ==
  // IOTEX:
  const iotex     = await factory.inner<20>(Chain.IOTEX);
  // Other EVM-compatible chains:
  const bsc       = await factory.inner<4>(Chain.BSC);
  const ethereum  = await factory.inner<5>(Chain.ETHEREUM);
  const avax      = await factory.inner<6>(Chain.AVALANCHE);
  const polygon   = await factory.inner<7>(Chain.POLYGON);
  const fantom    = await factory.inner<8>(Chain.FANTOM);
  const IoTeX     = await factory.inner<19>(Chain.IoTeX);
  const gnosis    = await factory.inner<14>(Chain.XDAI);
  const harmony   = await factory.inner<12>(Chain.HARMONY);
  // Non-EVM chains:
  const tron      = await factory.inner<9>(Chain.TRON);
  const elrond    = await factory.inner<2>(Chain.ELROND);
  const avalanche = await factory.inner<15>(Chain.ALGORAND);
  const tezos     = await factory.inner<18>(Chain.TEZOS);
  // To view an inner object:
  console.log("iotex:", iotex);
})();

8.6. Minting NFTs for testing

(async () => {
   const nftResult = await factory.mint(
      iotex,
      process.env.SK!,
      {
        contract: "0xC3dB3dBcf007961541BE1ddF15cD4ECc0Fc758d5",
        uris:["<Replace with your metadata URI>"]
      } as NftMintArgs
   );
   console.log("Minting result:", nftResult);
})();

8.7. Getting a list of NFTs a user owns on a Blockchain

(async () => {
  // Getting a list of NFTs
  const iotexNFTs = await factory.nftList(
    IoTeX,            // The inner chain object
    signer.address  // The public key of the user
  );
  // To view a list of NFTs:
  console.log("NFTs:", iotexNFTs);
})();

8.8. Transferring an NFT

(async () => {
    // Calling the function:
    const web3Result = await factory.transferNft(
    iotex,                      // The Source Chain.
    ethereum,                   // The Destination Chain.
    bscNFTs[0],                 // The NFT selected by the index.
    signer,                     // The web3 signer object.
    "ADDRESS OF THE RECEIVER"   // The address who you are transferring the NFT to.
  );
  console.log(web3Result);
})();

Addendum

Milestone reports

Once we award a grant, you must edit your post on every completed milestone , adding the details for the completed milestone.

Milestones Report:
:pencil:Invoice form has been filled out correctly for this milestone.
Deliverable Name : ALL Milestones
Proof : See Below
Note : See Below
Payment tx : IoTeXScan Transaction Hash | IoTeXScan

Milestones Deliverable Specification
Milestone 1.1 Testnet Smart Contracts We have deployed smart contracts on IoTeX MAINNET that are able to:
1. Support ERC-721 0xC3dB3dBcf007961541BE1ddF15cD4ECc0Fc758d5
2. Support ERC-1155 0x5df32A2F15D021DeF5086cF94fbCaC4594208A26
3. Bridge SC 0xE657b66d683bF4295325c5E66F6bb0fb6D1F7551
4. Freeze/Unfreeze Native NFTs in batches
5. Mint/Burn wrapped NFTs in batches
6. Pay the TX fees on the target chain in native tokens
7. Send / Receive NFTs in batches
8. Withdraw TX fees in the native tokens for the target chain
Milestone 1.2 Mainnet Smart Contracts We have deployed smart contracts on IoTeX MAINNET that are able to:
1. Support ERC-721 0x81e1Fdad0658b69914801aBaDA7Aa0Abb31653E5
2. Support ERC-1155 0xD87755CCeaab0edb28b3f0CD7D6405E1bB827B65
3. Bridge SC 0x4bA4ADdc803B04b71412439712cB1911103380D6
4. Freeze/Unfreeze Native NFTs in batches
5. Mint/Burn wrapped NFTs in batches
6. Pay the TX fees on the target chain in native tokens
7. Send / Receive NFTs in batches
8. Withdraw TX fees in the native tokens for the target chain
Milestone 2.1 Backend Integration Integration of IoTeX in the:
1. NFT Index Requires JWT
2. TX Fee Estimator
3. Crypto-currency converter
4. Heartbeat - checks whether the IoTeX Node & validators areup and operating properly
Milestone 2.2 Frontend Mainnet & Testnet & Documentation Integration of IoTeX in the:
1. User Interface
2. Wallets (Metamask, TrustWallet, WalletConnect)
3. The basic tutorial that can interact with the deployed smart contracts and backend service can be found above.
2

great project. will be great for our eco system