Jul 11, 2025 · 6 min read · Whether you’ve heard of Ethereum in the context of NFTs, smart contracts or DeFi; you're on the right place. Let's break down what Ethereum actually is, how it works and the tech behind its magic. 📚 TL;DR Ethereum is a platform for decentralized ap...
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Jun 13, 2025 · 3 min read · The blockchain industry is gearing up for a transformative 2025, and the two giants—Solana and Ethereum—are at the forefront of this evolution. As more businesses explore decentralized solutions, the debate over "Solana vs Ethereum" has become a foca...
Join discussionOct 13, 2024 · 2 min read · Concept The emphasis of this level is on the concept of overflow and underflow which is a concern for contracts written in solidity version <0.8. Basically, there are different types of integer data type. For example, uint256, int256, uint8, int8. Ea...
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Oct 5, 2024 · 4 min read · 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...
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Oct 3, 2024 · 4 min read · Smart contracts on Ethereum have revolutionized the way we interact with blockchain technology. These self-executing contracts, where the terms are written directly into lines of code, enable decentralized transactions without the need for intermedia...
Join discussionSep 18, 2024 · 11 min read · Imagine being able to prove that, no matter what inputs your program receives, certain properties or invariants will always hold by the end of the execution. This is what formal verification allows us to do, and in this article, we'll explore how to ...
Join discussionApr 15, 2024 · 7 min read · Goals In the The Rewarder challenge, we have to claim all the rewards from the next distribution round, despite having no DVT tokens. A hint points us at a new flashloan pool... See the contracts The Contracts // SPDX-License-Identifier: MIT pragma ...
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Apr 14, 2024 · 4 min read · Goals In the Side Entrance challenge, we have to steal all the ETH from the pool. Flashloans are free, and we start with 1 ETH. See the contracts The Contracts // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "solady/src/utils/SafeTra...
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Apr 13, 2024 · 4 min read · Goals In the Truster challenge, we have to drain 1 million DVT tokens from the flash loan pool. So pretty high stakes! Let's see how to achieve that. See the contracts The Contracts // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@o...
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Apr 12, 2024 · 6 min read · Goals The Contract // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract Stake { uint256 public totalStaked; mapping(address => uint256) public UserStake; mapping(address => bool) public Stakers; address public WETH; ...
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