Secure storage and management of your cryptocurrencies
Explanation of the Code:
-
Contract Structure: "CryptoSafe" is a basic contract for managing cryptocurrency transactions.
-
State Variables:
- balances: Stores balances of user addresses. -allowed: Stores allowed amounts of tokens that can be transferred on behalf of other addresses.
-
Events:
- Transfer: Fired when tokens are successfully transferred between addresses.
- Approval: Fired when permission to transfer tokens on behalf of another address is set or modified.
-
Functions:
- balanceOf: Returns the balance of the specified address.
- transfer: Transfers tokens from the sender's address to another specified address.
- transferFrom: Transfers tokens from a specified sender to another specified address, considering prior approval.
- approve: Sets the permission for a specified address to transfer tokens on behalf of the caller.
- allowance: Returns the current allowed amount of tokens for specified addresses.