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Oracles & Babel Fees

· One min read
Cardano Foundation
Cardano Foundation
Not-for-profit organization

In this session of the Cardano Developer Office Hours, Raul Rosa and Matteo Coppola explore two key topics shaping the Cardano developer ecosystem: decentralized oracles and sponsored transactions, also known as Babel fees. They compare oracle architectures such as Charlie3, Artifacx, and Fluid Tokens’ proxy model, examine how these designs influence smart contract development, and introduce Aquarium, an open-source protocol enabling users to pay fees in custom tokens instead of ADA, covering UTXO trade-offs, fee abstraction, and more.