Example coin package for Aptos blockchain

This module defines UserCoin, a coin on the Aptos blockchain.

Aptos standard library has a coin.move module, which describes how coins are defined. Think of it as ERC20.

To define a new coin, one needs to create a struct with name of the coin. It's struct UserCoin {} here.

Struct itself is not a coin. You need to use this type as an argument to coin::Coin type, ie. Coin<UserCoin>.

The module also defines a couple of entrypoints to handle this new coin:

• initialize(coin_admin: &signer) - registers coin and adds permissions to mint them to the coin_admin account. It can only be executed once.
• mint(coin_admin: &signer, to_addr: address, amount: u64) - mints an amount of Coin<UserCoin> to to_addr balance. Should be signed with the coin_admin account.
• burn(user: &signer, amount: u64) - burns an amount of Coin<UserCoin> from user balance.