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today were going to look at oracle services such as provable and chain link oracles get information that is not native to the blockchain onto the blockchain applications include generating random numbers calculating the prices of certain assets and also obtaining information about events that have occurred in the real world for example getting the score from a basketball game lets look at an example of how we can get the price of ether onto the blockchain we have real world exchanges such as coinbase and kraken which know the price of ether the oracle smart contract can docHub out to these data sources and say hey whats the price of ether after aggregating all the responses then the oracle contract can tell other smart contracts about the price of ether so in this case the contract is getting three responses from coinbase kraken and binance and getting the average of them which is 2518. then when a smart contract like maker dao wants the price then the contract can just say hey it