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metadata readme

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src/hooks/useMetadata/README.md
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Get metadata for a specific data asset. Get metadata for a specific data asset.
`useMetadata` has 3 uses:
- `useMetadata(did)` : it gets the ddo and then loads all the values (title, metadata etc)
- `useMetadata(ddo)` : it uses the passed ddo and the loads all the values, in case you already got a list of ddo, so you don't have to fetch the ddo once again
- `useMetadata()` : loads nothing, useful for using functions like `getBestPrice` or `getBestPool` (maybe more in the future) with minimal calls
## Usage ## Usage
```tsx ```tsx
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export default function MyComponent() { export default function MyComponent() {
// Get metadata for this asset // Get metadata for this asset
const { ddo, title, metadata } = useMetadata(did) const { ddo, title, metadata, bestPrice} = useMetadata(did)
const { main, additionalInformation } = metadata const { main, additionalInformation } = metadata
return ( return (
<div> <div>
<h1>{title}</h1> <h1>{title}</h1>
<p>Price: {main.price}</p> <p>Price: {bestPrice}</p>
</div> </div>
) )
} }