I am developing an ERC20 smart contract based on the OpenZeppelin wizard template. It is burnable, mintable, pausable, ownable, and upgradable (transparent),
My goal here is to enable gas-free transfer for the dapp users - please take a look at "metaTransfer()" in Contracts/WrappedToken.sol.
Accordingly, I am importing "ERC2771ContextUpgradeable.sol" and calling "__ERC2771Context_init()" inside the initialize() function. However, I am getting Undeclared identifier error for "__ERC2771Context_init".
To reproduce, please refer to https://github.com/YounseoRyu/01-defender-meta-txs.
I added contracts/WrappedToken.sol and test files for it under test/token.
However, the contract does not have any meta-tx related code yet, since I am getting an undeclared identifier error for "__ERC2771Context_init()".
I see that there are examples and workshops for ERC2771Context and MinimalForwarder.
Also, I am wondering if there are examples I can refer to for ERC2771ContextUpgradeable and MinimalForwarderUpgradeable. Examples for them will be a great help for me.