https://youtu.be/CdGge2Ku_oU In the presentation above, Tellor’s CTO, Nicholas Fett, gives us an overview of his work building a decentralised oracle network. Before we dive into Nick’s presentation, here are some important basics. What is Tellor? Tellor is a decentralized oracle network. Tellor is made up of a permissionless community of data providers, validators, and token holders. It makes use of crypto-economic incentives to secure the process of moving any type of data on-chain. Operating on multiple L1s and L2s, the Tellor team is obsessed with decentralisation. Some examples of projects that use Tellor’s oracle services are , , and . Liquity Reflexer Ampleforth Tellor Backstory & Why Derivatives Run into the Oracle Problem Back in 2017, Nick worked on Daxia – a smart contract creation platform for Over-The-Counter (OTC) derivatives on decentralised networks. Derivatives are financial assets that derive their value from a chosen assets’ performance. Derivatives in DeFi are especially important because of the lack of interoperability between blockchains. For instance, the Bitcoin blockchain is written in a different programming language than that of the Ethereum blockchain. This means that Ethereum smart contracts cannot be used on Bitcoin and vice versa. A way around this incompatibility of languages is wrapped tokens, a common derivative used in the blockchain space. An oracle service would be important in ensuring that as long as Wrapped BTC is used on the Ethereum network, the corresponding amount on the Bitcoin network is not spent. Using this WBTC example., derivatives run head-first into the oracle problem because in order for the correct amount of WBTC issued on ethereum needs to correspond with the amount of BTC locked on the bitcoin network. Back when Daxia was created, the only oracle service available  was Oraclize, now known as Provable Things. Oraclize, however, was a very centralised service, with just one server reporting data. This made it the single point of failure  for decentralised platforms using Oraclize data – if Oraclize was ever corrupted, your entire platform would receive false data. After running into all of this while building Daxia, Nick and his co-founders, Brenda Loya and Michael Zemrose, founded their own decentralised oracle solution – Tellor. Fast Forward to Now – What has changed? Since Tellor was launched, a lot has changed in the blockchain space. There are now several different widely-used L1s and L2s. Protocols are no longer restricted to building on just Ethereum. (Our panel, titled  “The future is multichain”, will be released soon.) Before we get into the specifics of how these changes affect oracle design, here are some important terms mentioned in the talk that are important to know. s, or s, like Avalanche, Solana, or Algorand, each have their own pros and cons with regards to transaction costs, speed of transactions, EVM compatibility and more. Layer 1 L1 or compatibility refers to smart contracts that can be easily migrated from Ethereum to other EVM compatible blockchains, and vice versa. Ethereum Virtual Machine EVM , refers to how different blockchains communicate with each other. Cross-chain communication : while decentralised exchanges ( ) like Uniswap have a lot of users and liquidity, Uniswap operates on one chain, ethereum. A cross-chain DEX would allow users to buy and sell tokens on different chains without a centralised third-party processing the trades. Cross-chain decentralised exchanges DEXs are used to transfer tokens from one blockchain to another. Bridging protocols Cross-chain communication, DEXs and bridges are all totally reliant on portable and reliable data, and are therefore reliant on robust oracle networks that can provide accurate data in a multi-chain environment. What are Oracles Missing? Most, if not all, of the oracle solutions operating today require centralised teams to deploy the oracle on new chains. Nick envisions a future where deploying an oracle network on a new L1 or L2 is as permissionless and decentralised as creating your own smart contract on ethereum, meaning anyone can do it anytime. Nick also mentions the need for better ways of ensuring the of data. Blockchain prices change constantly, 24/7. When oracles fail to report up-to-the-second data, . Liveness refers to how constantly up-to-date an oracle is. liveness millions can be lost What does the ideal oracle look like? According to Nick, the ideal oracle is simple, has minimal governance risk, and is flexible. The flexibility of an oracle can refer to how easily it is deployed on different chains, whether end users are able to request any data, or even the rate at which data is received. Aside from speed, different data types and information should be readily available for requesting, whether it is on-chain price data or off-chain data like weather or election data. At the same time, the ideal oracle should be decentralised and permissionless, meaning anybody should be able to become a node operator. There should be no restrictions on who can deploy a smart contract to the blockchain, and also on who can consume data from oracle nodes. Users should also be able to choose the nodes they wish to pull data from, including nodes they themselves operate. Why Decentralisation Matters Nick ends his presentation by reiterating the importance of decentralisation and mentions his experience working at the CFTC. The Commodity Futures Trading Commission (CFTC) is a regulatory body in the US for derivatives markets. He brings up the being fined by the CFTC for operating as its own oracle and the implications of this case on other oracle operators. For more details about the case and its implications on oracles, check out . case of Polymarket this video Another factor in the importance of decentralisation is how the over-reliance on the reputation of centralized authorities for accurate data can be dangerous. In theory, an established enough global entity, such as the Bank of England or the European Commission, would be incentivised to continue being honest because of the repercussions that dishonesty would lead to. There have been many instances, however, where trusted global entities have been allowed to continue operations in spite of their dishonesty – like the banks in the LIBOR scandal. The London Inter-Bank Offered Rate (LIBOR) is an average interest rate calculated by using submissions from leading banks from around the world, and is referred to as the most important number in the world. In 2012, it was uncovered that to fix the rates in each other’s favour. several banks colluded with each other Such collusion and manipulation could wreak havoc on DeFi, and building decentralised applications on decentralised blockchains with a reliance on data from a few trusted centralised entities flies in the face of blockchain values like trustlessness and decentralisation. In this new environment, robust and decentralised oracle networks like Tellor provide verifiable reliability instead of old-fashioned trust. Tellor was an Oracle Partner of the inaugural Blockchain Oracle Summit: Berlin. BOS22 was the first conference to focus solely on oracles’ importance and design. Leading speakers from across the DeFi-TradFi spectrum came to Berlin to take deep-dives into their work using oracles to power exciting use-cases of blockchain technology.

Bitcoin

Ethereum

Solana

Avalanche

Wrapped Bitcoin

Chainlink

Uniswap

Algorand

Chain

Oracle

YouTube

Understanding 0VIX: How to Approach Market Risk Assessments via Agent Based Modeling

As the transmitters of truth on a blockchain, oracles are one of the most crucial aspects of technology’s next chapter. The goal of the Blockchain Oracle Summit is to bring builders, users and investors together, to accelerate growth in the oracle space. While scaling oracles to meet growing demand, careful attention needs to be paid to maintaining costs, decentralization, trust and more. Immutable blockchains need to be complemented by the most robust oracle networks. 

Too Long; Didn't Read

From Company to DAO to Protocol, What Will be Next for Tellor?

From Company to DAO to Protocol, What Will be Next for Tellor?

About Author

Comments

TOPICS

THIS ARTICLE WAS FEATURED IN

Related Stories

Untitled Story

0VIX Launches Pre-mine, Introducing Unique Risk Management Feature

(1/100) Crypto Countdown: Golem

A Research Report on the Trader $JOE DeFi Platform

07/03/2018: Biggest Stories in the Cryptosphere

05/02/2018: Biggest Stories in the Cryptosphere

0VIX Launches Pre-mine, Introducing Unique Risk Management Feature

(1/100) Crypto Countdown: Golem

A Research Report on the Trader $JOE DeFi Platform

07/03/2018: Biggest Stories in the Cryptosphere

05/02/2018: Biggest Stories in the Cryptosphere

Light-Mode

Classic

Newspaper

Dark-Mode

Neon Noir

Minty

HN StartUps