Chainlink hackathon winner Digital Bridge walks through how they built a two-factor authentication service to trigger on-chain events using Chainlink oracles.

Learn how to build, test, and deploy a DeFi smart contract in Python, the dominant programming language of the fintech world.

Due to the immutability of smart contracts, it’s crucial that they are tested thoroughly before they are deployed. When it comes to writing automated tests, developers have a couple of options: Solidity Tests, Javascript/Python/other language tests. Often, it’s useful to test contracts both ways, and you can see from this sample testing