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Articles tagged with #web3-security
Concept The main concept being taught in this level is the difference between the use of tx.origin and msg.sender. Let’s try and understand this using the following image: Observations: If Bob calls contract A, the contract will see the value of tx...
We are asked to claim ownership of a contract whose code is provided as such: // SPDX-License-Identifier: MIT pragma solidity ^0.6.0; import "openzeppelin-contracts-06/math/SafeMath.sol"; contract Fallout { using SafeMath for uint256; mapp...
The challenge asks us to claim the ownership of the contract and reduce its balance to 0. In this case, we have been provided with the contract itself. // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract Fallback { mapping(address =...
