Express Protocol SDK is used to build applications for minting, trading, auctioning NFTs on multiple blockchains.

Currently, the following blockchains are supported:

Mainnet :-

• Binance Smart Chain
• Polygon Matic

Testnets :-

• Rinkeby Testnet
• Ropsten Testnet
• BSC Testnet
• Polygon Testnet

npm install pandora-express

For running the SDK code in a local environment -

→Clone the repository.

→Install the dependencies.

npm install

→Install parcel-bundler globally(if not already installed).

npm install -g parcel-bundler

→To initiate a sample application, run

parcel erc721/example/index.html

The erc721 and erc1155 directory follows a similar directory structure for two different token standards ERC721 and ERC1155 respectively. Inside both the directories -

-> The abi directory contains the abi of the smart contracts through which the Tokens are issued and traded within a blockchain network.

• pndc.js contains the abi of PNDC_ERC721 contract through which NFTs can be minted singly or in batch.
• tokenfactory.js contains the abi of TokenFactory contract through which NFTs can be put on direct sale, auction sale and can be bought, bid as well.
• tokenerc721.js contains the abi of TokenERC721 contract through which collections can be created.
• Similarly, pndc1155.js, tokenfactory1155.js and tokenerc1155.js inside erc1155/abi contains the abis for the ERC1155 token standard.

-> The example directory contains code for a basic application that uses all the functionality of Protocol SDK.

-> The src directory contains the main source code of the SDK.

• src/nft/mint.js contains code for minting NFTs.
• src/order/sell.js contains code for putting NFTs on direct sale, auction sale, and for canceling the sale.
• src/order/buy.js contains code for buying NFTs on direct sale.
• src/order/Bid.js contains code for bidding on NFTs, accepting bids, and withdrawing bids.
• src/collection/collection.js contains code for creating collections and minting, trading, auctioning NFTs inside the collection.
• src/common/utils.js contains utility functions and variables that are used by other functions.

index.js contains the code for the initialization of the SDK

Import createPandoraExpressSDK function from pandora-express and initialize SDK.

import {createPandoraExpressSDK} from "pandora-express";
const ExpressSDK = createPandoraExpressSDK();

Mint: NFTs can be mint using the mint function.

ExpressSDK.erc721.nft.mint(web3, chainId, minterAddress, tokenURI, royalties);

Sell: NFTs can be put on sale using the sellNFT function.

ExpressSDK.erc721.order.sellNFT(
  web3,
  chainId,
  tokenId,
  tokenPrice,
  ownerAddress
);

Buy: NFTs can be bought using the buyNFT function.

ExpressSDK.erc721.order.buyNFT(web3, chainId, saleId, buyerAddress, price);

Cancel Sale: NFTs on sale can be removed from sale using the cancelSale function.

ExpressSDK.erc721.order.cancelSale(web3, chainId, sellerAddress, saleId);

Auction: NFTs can be put on auction sale using sellNFTByBid function.

ExpressSDK.erc721.order.sellNFTByBid(
  web3,
  chainId,
  tokenId,
  initialPrice,
  ownerAddress,
  auctionTime
);

Bid: NFTs on auction sale can be bid using bid function.

ExpressSDK.erc721.order.bid(web3, chainId, saleId, buyerAddress, bidPrice);

Bid Execution: Bids on NFTs can be executed using acceptBid function.

ExpressSDK.erc721.order.acceptBid(web3, chainId, saleId, bidId, sellerAddress);

Bid Withdraw: Other bids except executed bid can be withdrawn using withdrawBid function.

ExpressSDK.erc721.order.withdrawBid(web3, chainId, saleId, bidId, buyerAddress);

TokenURI: Fetch token URI of the NFT using fetchTokenURI function.

ExpressSDK.erc721.nft.fetchTokenURI(
  web3,
  chainId,
  tokenId,
);

Collection: New collection can be deployed using createCollection function.

ExpressSDK.erc721.collection.createCollection(
  web3,
  chainId,
  ownerAddress,
  collectionName,
  collectionSymbol,
  collectionDescription,
  collectionRoyalties
);

Mint in Collection: NFTs can be minted inside collection using mint function.

ExpressSDK.erc721.collection.mint(
  web3,
  collectionAddress,
  tokenURI,
  minterAddress,
  royalties
);

Sell in Collection: NFTs can be put on direct sale inside collection using sellNFT function.

ExpressSDK.erc721.collection.sellNFT(
  web3,
  chainId,
  sellCollectionAddress,
  sellTokenId,
  sellPrice,
  ownerAddress
);

Buy in Collection: NFTs on sale can be bought in a collection using buyNFT function.

ExpressSDK.erc721.collection.buyNFT(
  web3,
  chainId,
  buyTokenId,
  buyerAddress,
  buyPrice
);

Auction in Collection : NFTs can be put on auction sale in a collection using sellNFTByBid function.

ExpressSDK.erc721.collection.sellNFTByBid(
  web3,
  chainId,
  sellByBidCollectionAddress,
  sellByBidTokenId,
  sellByBidPrice,
  ownerAddress,
  sellByBidTime
);

Bid Collection NFTs: NFTs on auction sale can be bid by other users in a collection using bid function.

ExpressSDK.erc721.collection.bid(
  web3,
  chainId,
  bidCollectionSaleId,
  bidderAddress,
  bidCollectionPrice
);

Bid Execution on Collection NFTs: Bids on NFTs can be executed in a collection using acceptBid function.

ExpressSDK.erc721.collection.acceptBid(
  web3,
  chainId,
  acceptBidSaleId,
  acceptBidId,
  sellerAddress
);

Bid Withdraw in Collection: Other bids except executed bid can be withdrawn in a collection using withdrawBid function.

ExpressSDK.erc721.collection.withdrawBid(
  web3,
  chainId,
  saleId,
  bidId,
  buyerAddress
);

Cancel Sale in Collection NFTs: NFTs on sale in a collection can be removed from sale using the cancelSale function.

ExpressSDK.erc721.collection.cancelSale(web3, chainId, sellerAddress, saleId);

Token URI of NFT in Collection: Fetch TokenURI of the NFT in a collection using fetchTokenURI function.

ExpressSDK.erc721.collection.fetchTokenURI(
  web3,
  collectionAddress
  tokenId
);

Upload NFTs to Pinata Cloud service :

ExpressSDK.pinata.upload(
  nftImage,
  nftDescription,
  pinataApiKey,
  pinataSecretApiKey
);

Upload JSON data to Pinata Cloud:

ExpressSDK.pinata.pinJSON(
  pinataAPIKeyJSON,
  pinataSecretApiKeyJSON,
  pinataJSONData
);