Upside NFT

UpsideNFT.io makes NFT procurement and sales both easy and rewarding. Our Dapp supports two primary operations:

1. Auto-listing collections for convenient & universal token minting.

2. Secondary market trading of ERC-721 and ERC-1155 NFTs for the Upside NFT marketplace using the following transaction types:

i. Fixed Price | NFT is listed for sale at a fixed price in ETH by the seller. The seller creates an off-chain voucher (EIP-712 cryptographic signing method for the voucher), which the buyer can accept to execute the transaction.

ii. Make an Offer | Buyer can make an offer for an NFT in WETH, by generating an off-chain voucher, which the seller can accept to execute the transaction.

iii. English (Standard) Auction | Seller creates an off-chain voucher authorizing the auction. Buyers can place bids in WETH, which are pledged by creating off-chain bid vouchers. The smart contract admin (UpsideNFT) auto-executes the highest bid against the auction.

In all cases, the transactions are arms length to the operator and occur P2P directly between transaction participants.