Transferring NFT's without manually signing transactions

Moralis General
#1

I have ERC-1155 NFT’s sitting on Polygon network. They are listed on OpenSea and Rarible so anybody can purchase them from there. I also would like to sell them on my own app without manually signing transactions (authentication) from my backend server. That blue “Sign” button on MetaMask (Firefox extension) is what I am referring to when I say manually signing transactions every time you transfer an NFT. Although I know there are websites where they allow you to batch send, they still require me to authenticate/sign manually.

Here is the scenario:

  1. Customer buys an NFT within my app (web or mobile)
  2. An API on my backend gets called

On the second step, I would like to automatically transfer the NFT to the destination wallet address without me signing the transaction.

I am new to the field and have done my research, and it is doable from what I understood. I do not want to jump in coding right away and perhaps I will realise after days of work that there is a huge part missing in the process or that it is not even easily possible that way and I basically will need to create my own wallet provider (like MetaMask).

I was wondering if this is possible via Moralis? If not, do I simply need to go with web3.js? If the answer is solely web3.js, then what are the steps that I need to follow?

I am happy to feed Moralis API’s/web3.js with my private key to my wallet address where all of my NFT’s are (because it is obvious to me that there is no other way).

Thanks in advance.

#2

You can use a backend like Node.js/Express that uses ethers.js or web3.js. You create a wallet instance using your private key which allows you to programmatically sign any transactions you want in code.

Moralis’s SDK can be used with node and has ethers.js built in.