solidity-security

# Solidity Security Master smart contract security best practices, vulnerability prevention, and secure Solidity development patterns. ## When to Use This Skill - Writing secure smart contracts - Auditing existing contracts for vulnerabilities - Implementing secure DeFi protocols - Preventing reentrancy, overflow, and access control issues - Optimizing gas usage while maintaining security - Preparing contracts for professional audits - Understanding common attack vectors ## Detailed patterns and worked examples Detailed pattern documentation lives in `references/details.md`. Read that file when the navigation tier above is insufficient. ## Testing for Security ```javascript // Hardhat test example const { expect } = require("chai"); const { ethers } = require("hardhat"); describe("Security Tests", function () { it("Should prevent reentrancy attack", async function () { const [attacker] = await ethers.getSigners(); const VictimBank = await ethers.getContractFactory("SecureBank"); const bank = await VictimBank.deploy(); const Attacker = await ethers.getContractFactory("ReentrancyAttacker"); const attackerContract = await Attacker.deploy(bank.address); // Deposit funds await bank.deposit({ value: ethers.utils.parseEther("10") }); // Attempt reentrancy attack await expect( attackerContract.attack({ value: ethers.utils.parseEther("1") }), ).to.be.revertedWith("ReentrancyGuard: reentrant call"); }); it("Should prevent...