What is Wallet Smart Contract?

Last Updated : 27 Feb, 2023

Wallets are just like your bank account, through which we can receive money, send money, and can check the balance.

Important terms:

uint- unsigned integer.
address- It is a unique set of the string provided for the transaction.
msg.sender- Address of the current user.
msg.value- Cost put by the current user.
public- Visibility of the function.
view- This keyword is used when the function is read-only.
modifier- modifier is just like a function, which is used at, the initial point of function so that it can check the required condition and prevent wastage of ether before function execution.

Depositing Money into the Contract Account owned by the owner

Solidity

// SPDX-License-Identifier: GPL-3.0  pragma solidity >=0.4.22 <0.9.0;   /// @title A contract for demonstrate Wallet Smart Contract /// @author Jitendra Kumar /// @notice For now, this contract just show how to depositing money into the contract account owned by the owner contract wallet{      // Specify the owner's address      // which is publicly visible     address payable public Owner;      // mapping is created for mapping      // address=>uint for transaction      mapping(address=>uint) Amount;            // Defining a constructor     // constructor is payable, which means      // it cost ether during the deployment     constructor() payable{                              // msg.sender is the address of the         // person who has currently deployed contract         Owner = payable(msg.sender);                             // msg.value is the value of the ether we are          // giving during the deploying of contract         Amount[Owner] = msg.value;          }      // modifier(onlyOwner) it will check      // the required condition, here condition      // is the only owner can call this function     modifier onlyOwner(){          // require is used whether the          // owner is the person who has         // deployed the contract or not         require(Owner == msg.sender);         _;     }     // Defining a function which is     // used to send money    function sendMoney(        address payable receiver,  uint amount)                         public payable onlyOwner {           // receiver account balance should be>0          require( receiver.balance>0);                    // amount should not be negative,          // otherwise it will throw error         require(amount>0);                                  Amount[Owner] -= amount;          Amount[receiver] += amount;     }      // Defining function for Receiving money      // to our smart contract account     // not to an owners account     function ReceiveMoney() public payable{     }       // This function will return the current      // balance of the contract account owned      // by the owner     function CheckBalance_contractAccount()        public view onlyOwner returns(uint){          return address(this).balance;      }      // Defining a function that will return     // the current balance of the owner's account    function CheckBalance()       public view onlyOwner returns(uint){           return Amount[Owner];    } }

In the above code, money is deposited in the contract account, not in the owner's account. Let us discuss a code in which we will see how to send ether directly into the owner's account.