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contracts...Wallet.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.0 <0.9.0; 

contract SampleContractWallet{
    
    mapping(address => uint256) public balances;
    address payable wallet;
    
    constructor(address payable _wallet) {
        wallet = _wallet;
    }
    
    function buyToken() public payable{
        balances[msg.sender] += 1;
        wallet.transfer(msg.value);
    }
    
}