NFT Exchange lets you swap your NFT with any other NFT. The platform provides a safe and decentralized avenue for owners to put up their token for trade where other owners can browse and offer their own token in exchange. If the offer is accepted, the exchange takes place.
Contents
- Features
- Process Process
- Technologies
- Live Product Preview
- Interacting With the Contracts
- Demo Screenshots
- License
- Interactive user interface accessible from any device with a web browser
- Put NFT up for trade by creating a listing, with option to write what you're looking for in the listing
- Browse other listings to discover interesting NFTs
- See an NFT you like? Offer up an NFT to exchange for it
- Manage your listings and offers with a single click.
- Seller transfers their NFT to exchange contract for listing.
- Exchange contract creates a listing record tied to the receiving NFT and the seller address.
- Buyer transfers their NFT to exchange contract as offer to a listing.
- Exchange contract creates an offer record tied to the both the receiving offer and listing NFT and owners.
- If seller accepts the offer: Exchange contract transfers the offering NFT to the seller and the selling NFT to the offerer, and mark both listing and offer as completed.
- If buyer cancels an offer, the offered NFT is transfered back to the buyer and the offer status is invalidated.
- If seller cancels a listing, the listed NFT is transfered back to the seller and the listing status is invalidated. For offers to this listing, the buyer can cancel the offer to reclaim their NFT.
Frontend Application (UX)
- The front end web application is developed in React with NextJS framework.
Blockchain Smart Contract
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NFT Sample Contract: Stratis Smart Contract writen in C# representing a sample NFT implementing the ERC-721 standard. This contract is used to create dummy NFT for development, testing and demo.
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NFT Exchange Contract: Stratis Smart Contract writen in C# of the actual NFT Exchange contract. This contract is responsible for all manner of the NFT Exchange. See NFT Exchange Contract functions for functions.
NFT Contract Hash & ByteCode:
Hash
37bedfee7c47c576366d0a7f633b44a37e6e998db4e3b8051f2062d58f7184df
ByteCode
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Exchange Contract Hash & ByteCode:
Hash
5d77a5cc6e7b72e8cc304efeeb13874b03a1fead54df23abd94c3605ebf43357
ByteCode
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Prerequisite: Download the Stratis SmartContracts Tools
- Clone the source code from repo
git clone https://github.com/jnlewis/StratisNFTExchangeContracts.git
- Restore the NFT Token Sample Contract
> cd NFTStandardERC721
> dotnet restore
- Build the NFT Token Sample Contract. Take note of the output byte code.
> cd ../Stratis.SmartContracts.Tools.Sct/Stratis.SmartContracts.Tools.Sct
> dotnet run validate ../../StratisNFTExchangeContracts/NFTStandardERC721/NFTStandardERC721.cs -sb
- Restore the NFT Exchange Contract
> cd NFTExchange
> dotnet restore
- Build the NFT Exchange Contract. Take note of the output byte code.
> cd ../Stratis.SmartContracts.Tools.Sct/Stratis.SmartContracts.Tools.Sct
> dotnet run validate ../../StratisNFTExchangeContracts/NFTExchange/NFTExchange.cs -sb
- Pull Stratis node docker image
docker pull stratisplatform/stratisfullnode:Stratis.CirrusMinerD-1.1.0.0-ext
- Run the stratis node docker image
docker run -p 38223:38223 stratisplatform/stratisfullnode:Stratis.CirrusMinerD-1.1.0.0-ext
- Browse node API http://localhost:38223/Swagger
- Find the wallet address on the local chain which has GAS.
curl --location -g --request GET 'http://localhost:38223/api/Wallet/list-wallets' \
--header 'Accept: application/json'
curl --location -g --request GET 'http://localhost:38223/api/Wallet/addresses?WalletName=cirrusdev' \
--header 'Accept: application/json'
- Deploy the contract. Take note of the TxHash in the response. On loal node, the wallet password is
password
curl --location -g --request POST 'http://localhost:38223/Swagger/api/SmartContractWallet/create' \
--header 'Content-Type: application/json-patch+json' \
--header 'Accept: application/json' \
--data-raw '{
"walletName": "{{wallet-name}}",
"amount": "0",
"feeAmount": "0.001",
"password": "{{wallet-password}}",
"contractCode": "{{contract-bytecode}}",
"gasPrice": 100,
"gasLimit": 100000,
"sender": "{{wallet-address}}"
}'
- Get the new contract address from the response
curl --location -g --request GET 'http://localhost:38223/api/SmartContracts/receipt?txHash={{TxHash}}' \
--header 'Accept: application/json'
A complete Postman collection is available for all the public functions in smart contracts.
| Function | Description |
|---|---|
| CreateListing | Creates a listing of an NFT token making it available for receiving offers. |
| MakeOffer | Makes an offer for an NFT listing, providing an NFT token as the offer item. |
| AcceptOffer | Accept an open offer and performs the exchange transaction by transferring the offered NFT to the seller and the listed NFT to the offerer. |
| CancelOffer | Cancel an open offer. Invoker must be the offerer of this offer. |
| CancelListing | Cancel an open listing. Invoker must be the seller of this listing. |
This is only a dummy NFT contract created for the purpose of testing and development.
| Function | Description |
|---|---|
| Mint | Mint a new NFT. |
| OwnerOf | Gets the owner of the given token ID. |
| TransferFrom | Transfer a token to the given address. |
| GetTokenProperties | Get the data properties of the given token ID. |
- Open source Apache-2.0 License