The Oracle Problem Explained

Welcome to Oracles and External Data Integration! In this lesson, we'll explore a fundamental challenge in blockchain: how do smart contracts get information from the real world?

This challenge is known as the Oracle Problem. It's about securely and reliably connecting the blockchain's isolated world with external data.

Think of a blockchain as a highly secure, self-contained computer. It's designed to be deterministic, meaning every node running the network must arrive at the exact same result for every transaction.

To maintain this, blockchains are isolated from the outside world. They can't directly 'call out' to websites, APIs, or databases to fetch information.