Why am I getting the following error in this code: How do I fix this? Warning: Functions in interfaces should be declared external. function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public;
I am an Ethereum beginner. Now I want to learn more about Ethereum-related knowledge. After creating an Ethereum-based token, I created a token. How do I increase the amount of this token and need to mine? Is this mining process supported by the miners behind the blockchain in the Ethereum network?Does the process of producing a new token require mining? Could you recommend a document for me?Think you in advance.