ULendMe

Made by: Gabriel Brandão

This is a work in progress.

About the dApp

Because NFTs are completely unique, if someone wants to make use of one (be it for gaming, for access or any needs you may have),
they would have to buy it, and the person that had access to it will lose it, and won't be able to access it anymore.

This dApp enables users to utilize NFTs without having to pay it's full price and without having to worry about possession changing.
At the same time, lenders can make a profit of their NFTs without losing them, not having to worry about selling and loosing it's possession.

This dApp will provide a plataform for:

• Creating Offers for the NFTs avaiable in your wallet (we will use Metamask)
• Browsing a Catalog with all the NFTs avaiable to borrow
• Choosing the NFT you want and borrowing it
• Seeing the offers you've made and their status
  
  Now we will go through how to build, run and interact with the dApp. As mentioned above, this is a work in progress, and not all features are avaiable. Currently, it's only possible to create NFT offers.

Building and Running the dApp

To run Back-end:

- cd ULendMe/
- sunodo build
- sunodo run

To run Front-end Console:

- cd sunodo-frontend-console/
- yarn && yarn build

Sending Inputs

• The input send command adds inputs to a Cartesi Rollups DApp and has the following format:

yarn start input send --payload [message] <options>

[message] will be: nft_id, price, post_timestamp, loan_period

• So, for example:

yarn start input send --payload "offer,ape#123,0.0065,18-03-2024-19:30,7"

• Sending inputs using different accounts:

yarn start input send --payload 'offer,leopard#09,3.0,22-03-2024-20:30,30' --accountIndex '1'

Handling Ether

• payload for transfering Ether:

yarn start input send --payload '
{
    "method": "ether_transfer",
    "from": "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
    "to": "0x70997970C51812dc3A010C7d01b50e0d17dc79C8",
    "amount": 1000000000000000000
}' --address 0xab7528bb862fb57e8a2bcd567a2e929a0be56a5e

• payload for withdrawing Ether:

yarn start input send --payload '
{
    "method": "ether_withdraw", 
    "from": "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266", 
    "amount": 1000000000000000000
}' --address 0xab7528bb862fb57e8a2bcd567a2e929a0be56a5e

• payload for executing Vouchers:

yarn start voucher execute --index 0 --input 2 --address 0xab7528bb862fb57e8a2bcd567a2e929a0be56a5e

Handling ERC721 Tokens

• payload for transfering a ERC721 tokens:

yarn start input send --payload '
{
    'method': 'erc721_transfer',
    'from': '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    'to': '0x70997970C51812dc3A010C7d01b50e0d17dc79C8',
	'erc721': '0xae7f61eCf06C65405560166b259C54031428A9C4',
    'token_id': 0
}' --address 0xab7528bb862fb57e8a2bcd567a2e929a0be56a5e

• payload for withdrawing a ERC721 token:

yarn start input send --payload '
{
    "method": "erc721_withdraw",
    "from": "0x70997970C51812dc3A010C7d01b50e0d17dc79C8",
	"erc721": "0xae7f61eCf06C65405560166b259C54031428A9C4",
    "token_id": 1
}' --address 0xab7528bb862fb57e8a2bcd567a2e929a0be56a5e

Inspecting Inputs

• The yarn start inspect --payload "" can inspect the posts of the dApp

yarn start inspect --payload '<payload-here>'

• So, for example:

yarn start inspect --payload "Catalog"

You will inspect all offers posted on the page

• And this command here:

yarn start inspect --payload "Status,0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"

Allows you to check your private loaned tokens

• Checking your wallet balance for ETHER: balance/ether/{wallet}

yarn start inspect --payload "balance/ether/0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"

• Checking your wallet balance for ERC721:

balance/ether/{wallet}/{token_addres}/{token_id}

yarn start inspect --payload "balance/erc721/0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266/0xae7f61eCf06C65405560166b259C54031428A9C4/0"