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smartcontracts

(6 articles)

Signature Security: EIP-712 Typed Data, Nonces, ChainId, and Replay Pr

When signing transactions or messages on Ethereum or Base, developers must ensure signature security to prevent replay attacks and ensure message integrity. Several mechanisms—EIP-

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Upgradeable Contracts: UUPS vs Transparent Proxies and the Storage-Col

Upgradeable smart contracts are essential for long-term maintenance and evolution of decentralized applications. However, the mechanisms used to achieve upgradability introduce pot

soliditysecuritysmartcontractsdefi

Oracle Safety: Why a Spot Price is Exploitable and How TWAPs and Chain

Smart contracts often rely on external data to make decisions, such as price feeds for decentralized exchanges or lending protocols. However, using a single spot price from an orac

soliditysecuritysmartcontractsdefi

Access Control Done Right: Ownable2Step, Role-Based Access, and the tx

Access control is a foundational aspect of smart contract security. Poorly implemented access control can lead to unauthorized modifications, theft, and contract failure. In this p

soliditysecuritysmartcontractsdefi

How Reentrancy Actually Works, and Three Modern Defenses

Reentrancy is a critical security vulnerability in smart contracts where an external contract calls back into the current contract before the original function has completed. This

soliditysecuritysmartcontractsdefi

Provably Fair Dice on Bitcoin L1 — No Tokens, No House, No KYC

A deep dive into Nakamoto's Dice, a 6-player dice game running entirely on Bitcoin mainnet smart contracts via OpNet.

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