Metamask: How to create smart contract using openzeppelin metatx relayer to receive and withdraw usdt erc20 token using metamask?

I can provide you with an article on how to create a Metamask wallet that uses the OpenZeppelin Defender Relay contract to receive and withdraw USD tokens (ERC-20) using a MetaMask account.

Creating a Smart Contract with OpenZeppelin Defender Relay

To use the OpenZeppelin Defender Relay, we will need to create a new smart contract that can handle gasless transactions. Here is an example of how you can achieve this:

First, let’s create a new smart contract in Solidity that will be used as a relay for our MetaMask wallet. We will call it “RelayContract”.

pragma solidity ^0.8.0;
import "
import "
contract RelayContract {
// Map addresses to their balances
map(address => uint256) public balances;
function drawToken(uint256 _amount, receiver _address) public {
require(balances[msg.sender] >= _amount, "Insufficient balance");
require(_amount <= 10**18, "Invalid amount");
// Use OpenZeppelin Defender to handle gasless transactions
bytes with data in memory = abi.encodeWithSignature("withdrawToken", _amount, msg.sender);
// Call the relay contract with the data as a function call
(bool success, ) = openzeppelinDefender.relay(data);
}
}

Next, let’s create a MetaMask wallet that can use this new smart contract. We’ll also configure OpenZeppelin Defender to handle gasless transactions.

pragma solidity ^0.8.0;
import "
import "
contract MetaMaskWallet {
// Map addresses to their balances
map(address => uint256) public balances;
// Function to add a new account to the wallet
function addAccount(address _newAddress, uint256 _amount) public {
balances [_newAddress] = _amount;
}
// Function to remove an account from the wallet
function removeAccount(address _address) public {
balances [_address] = 0;
}
}

Now let’s connect our MetaMask wallet to OpenZeppelin Defender.

pragma solidity ^0.8.0;
import "
import "
contract protector {
// Map addresses to their balances
map(address => uint256) public balances;
function addAccount(address _newAddress, uint256 _amount) internal {
balances [_newaddress] = _amount;
}
function removeAccount(address _address) internal {
balances [_address] = 0;
}
}

Next, let’s create a MetaMask wallet that uses this new smart contract.

“`solidity

pragma solidity ^0.8.0;

import “

import “

import “