Create a MAX SUPPLY to Mint ERC20

cpp-ethereumerc-20remixsolidityweb3js

I want to create an ERC20 on Solidity.

I want 1000 TOKENS of MAX SUPPLY (Like the 21m of bitcoin).

PERSON A: Mint to his wallet 700 Tokens. (Thats okey)

Only 300 Tokens are available.

PERSON B: Mint to his wallet 400 Tokens. (¡Error!)

How can i do it?

Thanks!

Keep MAX_SUPPLY as a variable in your Smart Contract that stores the maximum number of tokens that you wanna sell.

Also keep a TOKENS_SOLD variable in the Smart Contract that keeps track of how man tokens have been sold so far.

Before someone tries to mint some tokens, do the below

require(MAX_SUPPLY > TOKENS_SOLD + numberOfTokensToBeMinted, "Insufficient supply");

This should serve your purpose.

https://ethereum.org/token covers most of what you describe, so no, I don't think there are any issues with doing that.

You can create a new ERC20 token using openZeppelin contracts.

And if you need to send the token to another account by either using some wallet or send it using some lib like web3js, etherjs etc

You can also create a function to mint token in your contract itself

function mint(address to, uint256 amount) public {
    _mint(to, amount);
}

Use some access control to restrict it from all wallet