How To Create a Tokenbound Account (ERC-6551)

[@thehogchop]

Thanks for the helpful video. One thing I didn't hear mentioned in the video and might be helpful for people to know: you do not need to deploy your own ERC6551 contract - the group who proposed EPI6551 have deployed this contract across many chains already. This means you can use their website to generate a wallet for any NFT you currently own. As I understand it, you'd only want to go down this route if you wish to implement custom wallet features for the NFT's.

[@BlockchainDev101]

how can we be sure they have deployed the contracts on the networks we are building on?

[@Gandarufu]

Thanks so much for the tutorial! I watched a few so far, and I never fully understood what's going on, until I found your video! Appreciate it!

[@pinatacloud]

Glad you found this video helpful!!

[@Gandarufu]

@@pinatacloud Any hint on how I could deploy a TBA for every NFT of a 721 contract directly after mint? Been trying to call the registry from within the mint function, after _safeMint, so far without luck. Or would that a bad idea? :D

[@pinatacloud]

@@Gandarufu Good question! Checking with Kelly to see if she has any insight. Will reply again when I have an answer!

[@Gandarufu]

@@pinatacloud I think I got it working now. just created an interface of the registry and called the createaccount on it from within the mint function. which got me thinking... maybe the NFTs don't even need to be minted before you calculate the address. if so, I could set up the TBAs in advance. will test this tomorrow. thanks for your input anyways, I really appreciate it!

[@pinatacloud]

@@Gandarufu Oh nice! Let us know if it ends up working after you test

[@vanijatkosolomichev9452]

function receive() is NOT for erc20 / 721 or any other erc. This function must be implemented to be able to receive native coins, like eth, bnb, matic etc

[@9712]

hey you is there a way to mint a erc6551 directly from the start?

[@pinatacloud]

Hey there! Might depend by what you mean. In order for there to be an ERC-6551 wallet for an NFT, the NFT has to be there first! There currently isn't a way to make the wallet by itself, its generated based on the NFT you are creating it for. You could pre-mint ERC-721 NFTs and give them ERC-6551 token bound wallets before you sell them or have people collect them though.

[@9712]

@@pinatacloud thank you for the quick response, so basically I need to create a function that mints the erc 721 token and instantly upgrade it to a erc6551? Is there an existing function that already does this?

[@pinatacloud]

@@9712 No problem! And yes you are on the right track. It doesn't "upgrade" the existing ERC-721 NFT but rather just gives it a wallet. Thankfully the process of doing this has become much easier; I would recommend checking out the tokenbound sdk here: docs.tokenbound.org/sdk/installation

[@xWe2s]

very chaotic.. why in the end the account contract receive 9 eth and the `to` receive just 1 eth?! And.. how and why the token account can operate funds from the owner/user?!

[@valentineorga]

That confused me as well. I'd expect the account to be funded before it can make transfers. Maybe that happened in-sync

[@neilcollier9075]

Very nice tutorial! After we have a TBA setup the part that confuses me is how to then *use* the TBA as the NFT? This would be great to see as a new video and help a lot of people I think! For example, say I have a TBA owned by address 0x123 that is linked to token contract XYZ with token id 1. I want to "login" to a metaverse game as the NFT and while in the game have the TBA do on-chain operation like give it in-game items (which are also NFTs) or in-game gold and rewards (ERC 20 tokens). In this scenario how would you authorize the TBA initially in login? Since the TBA itself gives you no private keys I assume you must login via a wallet as the owner account? I had read somewhere that this new standard did not require using wallets thanks to ERC-4337 so I don't get how that plays into the mix... Also, say when in the game you then want to have the TBA send tokens to another player in the game (say to purchase or trade an item from their account to yours), how would you do that securely? Would it require signing transaction again as the owner account via a wallet integration like Metamask? Somehow I thought this standard would alleviate needing wallets and private keys after the TBA was created...

[@pinatacloud]

Thanks for watching and thanks for the feedback! We are still experimenting with erc 6551 and TBA's as well, so these questions will help us. We'll have more videos up on this topic soon!

[@cryptoleek]

No one can understand. I will do a better video.