Скачать или смотреть Cross NFT Application Guide

Cross NFT Application 
Works with Ethereum chain, Binance Smart Chain and Polygon network 
Application exchanges digital assets in different chains without using bridges. 
You need to have wrapped NFT with collateral of tokens in the source network to be changed for the  tokens in the target network.

There is a wrapped NFT with one NIFTSY token in side
Select “Prepare for crossing” if context menu of wrapped NFT  
Select the network in which NFT key to be created. 
Indicate the PIN code - the secret word.
Envelop does not know or store your PIN codes. Only the hash of the PIN.
Start Crossing
Confirm all transactions in the metamask. For transactions, we set an increased price for gas.
Save the PIN code and the hash of the PIN code in the secured place.
Close the window.
Wrapped NFT is fixed on the Envelop contract and owned by the contract. 
Go to the web page https://appv1.envelop.is/crossings to check all cross-NFTs. 
There is wrapped NFT for cross NFT creation in the first line of wrapped NFT for crossing section.
Transactions of cross NFT creation are available as well. 
Click on switch to the target network to create the second part of the cross NFT = NFT key.
Confirm the action in metamask.
A Mint NFT button has now appeared close to our record. 
Click the button.
Launch creation of NFT key.

Confirm transaction in metamask.   
The panel with button “To the NFT key” is shown on the screen.
Web page to view NFT key is open
NFT key can be also viewed in the application https://appv1.envelop.is/list in the Discovered section
Next, let's start the exchange of assets between networks.
We have a partner with assets in the target network. 
We send him an NFT key and tell him the PIN code. 
The partner, in return, transfers assets to us in the target network.
On the NFT key section, the transfer is initiated. 
The recipient is specified.
Confirm transaction in metamask.   
The partner transfers assets to us in the target network.
The partner goes to the page https://appv1.envelop.is/crossings and checks the NFT key - the first record at the top.
To receive assets in the source network, the partner should burn the NFT key.
Confirm the transaction in the target network - burning.
Reload the web page to check if the NFT key is burned and switch to the source network.
After switching Confirm the action in metamask. 
Enter the PIN code and get wrapped NFT with assets in the source network.
Confirm the transaction in a metamask.
The partner owns wrapped NFT with tokens in the source network.
The exchange is completed. 
The partner can find the wrapped NFTs on https://appv1.envelop.is/ in the Wrapped section. 

The wrapped NFT can be unwrapped.