Smart Contracts Design Patterns Series! Introduction Oracles are used to connect decentralized systems to the off-chain world. In other words, oracles are bridges between the off-chain and the on-chain systems. Based on the data flow and request directions, oracles can be categorized in four ways: — Pull based inbound oracle: Blockchains…

On April 7th, after Aave V3 had launched for 3 weeks, we discovered an issue on Aave V3’s price oracle. To be more specifically, the fallback oracle. After initially failing to reach out to Aave, we contacted @samczsun who helped notify the Aave team and the issue was resolved promptly…

Random Number Generation (RNG) is an important part of applications that require non-deterministic results. This includes encryption systems and gambling software. In this systems, a random number is needed to provide a result that cannot be based on finality, but probability. Encryption algorithms use salt, as a way to add…

We’re excited to announce that Aworld — a collection of 10,000 original hand-painted NFTs — has integrated Chainlink Verifiable Random Function (VRF) on the Ethereum mainnet. By integrating the industry-leading decentralized oracle network, we now have access to a tamper-proof and auditable source of randomness needed to assign random species…

Introduction Price feeds addresses can be found here : https://docs.chain.link/docs/ethereum-addresses/ Price feeds provide conversion rate between two assets.

Know the types of oracles and their practical use cases — Oracles, ideally, provide a simple way of getting extrinsic (i.e., “real-world” or off-chain) information, like the price of currency pairs, the price of gold, or truly random numbers, onto the Ethereum platform for smart contracts to use. Blockchains and smart contracts cannot access off-chain data (data that’s outside of the…

In this piece, my first ever crypto thought piece, I’ll be taking a deep dive into Chainlink; what Chainlink is, how it fits into the crypto ecosystem, and where it’s headed in the future. …