Iván 🔝

Hi guys, any resource for fully understand how the heck works IPFS? I want to understand how the files dissapear and how avoid this and some extra technical info

It's good practice return an array in O(1) ? What will be the limit?

Hey! Can I get easily the holders of tokens by.. web3, Etherscan API, TheGraph?.. thanks in avance 👋🏼

What would be a good solution instead? I don't want to iterate over all items in mapping because this scales so bad

Where can I see gas cost of every solidity base function e.g, revert vs require with message both, transfer, send etc... ?

Not deploying, in the code, have you already tested your code? Local test or something?

Interesting, he created another contract to mint tokens from your contract?

what will happens with Rinkeby after merge?