Metamask: How to create smart contract using openzeppelin metatx relayer to receive and withdraw usdt erc20 token using metamask?
I’m provide you with an article on-to-worthy wing that will be the Western Breaker Receipt Receipt and withdraw USD-Tokens (ERC-20) using.
**Creating a Smart Contract with a Syr
To use the OpenZeppelin Defender Relay, We’ll Need to Create a new Smart Contract that cany gasless transactions. Here’s an example off how of you can achieve this:
First, let’s creet a new smart contract in Solidity that will be the relayer for the remedy MetaMask wallet. We’ll call it RelayContract.
`solidity
pragma solidity ^0.8.0;
import "
import "
contract RelayContract {
// Mapping off your balance balance
folder(address => uist256) publical balance;
function with withdrawToken(unt256 _amount, sleeved _recipient) public {
require(balances[msg.sender] >= _amount, "Insufficient Balance");
require(_amont <= 10**18, "Invalid amont");
// See
bytes memory data = abi.encodeWithSignature( "withdrawToken", _amont, msg.sender);
// Call the relay contract with the data as a function call
(bool success, ) = openzeppelinDefender.relay(data);
}
}
re
Next, let's crate a MetaMask walet that can use this new smart contract. The We'll will be set up the Republic of the Defender to handle gasless transactions.
solidity
pragma solidity ^0.8.0;
import "
import "
contract MetaMaskWallet {
// Mapping off your balance balance
folder(address => uist256) publical balance;
// Function to add a new account to them
function addAccount (address _newAddress, utilities 256 _amont) public {
balances[_newAddress] = _amont;
}
// Function to remove an account from the wall
the function of the removeAccount(address _address) public {
balances[_adddress] = 0;
}
}
re
Now, let's connect or MetaMask wallet to OpenZeppelin Defender.
solidity
pragma solidity ^0.8.0;
import "
import "
contract Defender {
// Mapping off your balance balance
folder(address => uist256) publical balance;
function addAccount (address _newAddress,
balances[_newAddress] = _amont;
}
the function of the removeAccount (address _address) within the {
balances[_adddress] = 0;
}
}
re
Next, let's crate a MetaMask walet that usees this new smart contract.
`solidity
pragma solidity ^0.8.0;
import “
import “
import “