In order to implement an ERC20 token contract, you'd need at least to implement the following functions and events in order to fulfill the interface requirements:
A) totalSupply(), balanceOf(address), allowance(address,address), transfer(address,uint256), approve(address,uint256), transferFrom(address,address,uint256). Events: Transfer(address,address,uint256), Approval(address,address,uint256)
B) name(), symbol(), totalSupply(), balanceOf(address), ownerOf(uint26),approve(address,uint256), takeOwnership(uint256),transfer(address,uint256),Events: Transfer(address,address,uint256), Approval(address,address,uint256)

Question

Quizplus · Accepted Answer

The ERC20 standard requires the implementation of functions totalSupply(), balanceOf(), allowance(), transfer(), approve(), and transferFrom(), along with the Transfer and Approval events.

In Order to Implement an ERC20 Token Contract, You'd Need