What is DeFi

DeFi book describes DeFi as short for Decentralized Finance. DeFi combines blockchain technologies with smart contracts to create a novel financial ecosystem. This new ecosystem replicates and complements many existing financial services and products. It also enables a completely new set of innovative services and products that are available to anyone, anywhere, at anytime!

Blockchain and smart contracts.
Blockchain and Smart Contracts.

In DeFi, participation is permissionless, and anyone is free to join. Anyone can also issue new tokens and trade them as they wish. These tokens can represent anything from currencies, properties, special rights or accesses, artwork, or any asset class, whether physical or digital.

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What is an Oracle

In DeFi, an oracle can refer to a smart contract that stores real-world data, such as asset prices, exchange rates, sports scores, weather data, etc. Alternatively, an oracle can also refer to an entire ecosystem and associated services that bridge data between on-chain and off-chain.

DeFi Boo - Oracle.
Oracle bridging data from off-chain into on-chain.

Oracles are an important part of decentralized finance because they enable smart contracts and dApps to make informed decisions and execute actions based on real-world information.

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