Slither & Echidna + Remappings
While testing a project using hardhat and Echidna I was able to run all tests in the project with echidna-test . but was not able to run tests in a specific contract that imported...
Justin Silver Blog
UnsafeMath for Solidity 0.8.0+
UnsafeMath is a Solidity library used to perform unchecked, or “unsafe”, math operations. Prior to version 0.8.0 all math was unchecked meaning that subtracting 1 from 0 would underflow and result in the max...
NFT Keyed Ephemeral Counterfactual Minimal Proxy Contracts
These example contracts demonstrate a gas effective way to deploy counterfactual contracts using CREATE2. Using minimal proxy instances that are destroyed between transactions is a secure way to isolate assets in a way that...
NFT – Mint Random Token ID
The perceived value of many NFTs is based on that item’s rarity making it ideal to mint them fairly. Rarity snipers and bad actors on a team can scoop up rare items from a...
Provable Randomness with VDF
A Verifiable Delay Function (VDF) is a linearly computed function that takes a relatively long time to calculate, however the resulting proof can be verified to be the result of this computation in a...
Fantom Lachesis Full Node RPC
Create an Alpine Linux image to run the lachesis node for the Fantom cryptocurrency. The run.sh just starts the nodes with the ports you set in the environment. Use docker-compose to define the TCP/UDP...
Alpine Linux PHP + iconv fix
To use PHP with iconv on Alpine Linux – in a Docker container for example – you need to use the preloadable iconv library, which was previously provided with the gnu-libiconv package, but was...
