Connections Between Blockchain and APIs

Blockchains are isolated networks that do not communicate with each other natively. Another Blockchain challenge is the interaction with external systems and APIs that are off-chain. But there are already solutions for communication between Blockchains in web3, known as cross-chain messages and also for interaction with web2 APIs using oracles.

In this live coding and hands-on session you will start from zero installing a web wallet, creating smart contracts in different blockchains and then experience both integrations: cross-chain communications between blockchains and interaction with external APIs using some Chainlink oracles and services.