Using the Openzeppelin libraries, for example in a function to deposit tokens, I need to check if the contract is approved and the user has the tokens or does the Transfer function take care of that?

Transfer and Approve of ERC20 tokens

abcoathup February 8, 2021, 3:06am 3

You may want to look at the following examples:

Topic		Replies	Views
Need to deposit all erc20tokens in my wallet into smart contract which I deployed Smart Contracts erc20	5	1046	September 23, 2021
Deposite and withdraw erc20 token using smart contract Contracts erc20 , solidity	3	4697	January 9, 2022
Example on how to use ERC20 token in another contract Guides and Tutorials erc20	21	44311	May 26, 2022
How to make smart contracts accept erc20 token Smart Contracts erc20	14	1137	June 17, 2022
Is it possible to call the erc20 approve function from another contract? Contracts	5	10945	December 15, 2020