Smart contracts are getting new superpowers by using Witnet to interact with any external data source!
Everyone involved with Ethereum smart contracts knows that they are self-contained in their own supporting blockchain. Contracts have very little capability to interact with other blockchains, the Internet and the rest of the world.
Currently, external information can only be fed into Ethereum contracts by trusted authorities (probably, the developer of the contract) who need to sign claims about the state of the world. These are called " oracles ".
But relying on a single oracle...
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