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### tl;dr
* price oracles are any tool showing an asset's price but in context of defi.
* oracles provide a trustless way of getting extrinsic (off-chain) information, they provide the some key functions such as collect data from an off-chain source, transfer the data on-chain with a signed message, and make the data available by putting it in a smart contracts storage.
* price oracles are any defi tool showing an asset's price.
* oracles should provide a trustless way of getting extrinsic (off-chain) information, and some key functions such as: collect data from an off-chain source, transfer the data on-chain with a signed message, and make the data available by putting it in a smart contracts storage.
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