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DZakh
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Apr 2, 2025
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| ### Field Selection | ||
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| You can optimize data retrieval by specifying exactly which fields to fetch (this is used to enhance performance, see [Interactive Schema Explorer](#interactive-schema-explorer) section): |
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Clarified the wording and made Field Selection per event the default one.
DZakh
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Apr 2, 2025
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| ```typescript | ||
| import { Greeter, User } from "generated"; | ||
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| // Handler for the NewGreeting event |
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Moved example higher on the page
DZakh
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Apr 2, 2025
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| HyperIndex provides many features to help you build more powerful and efficient indexers. Read more about these on separate pages: | ||
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| - Handle Factory Contracts with [Dynamic Contract Registration](/docs/HyperIndex/dynamic-contracts) (with nested factories support) | ||
| - Index all ERC20 token transfers with [Wildcard Indexing](/docs/HyperIndex/wildcard-indexing) | ||
| - Use [Topic Filtering](/docs/HyperIndex/wildcard-indexing) to ignore irrelevant events | ||
| - With [multiple filters for single event](/docs/HyperIndex/wildcard-indexing#multiple-filters-example) | ||
| - With [different filters per network](/docs/HyperIndex/wildcard-indexing#different-filters-per-network) | ||
| - With [filter by dynamicly registered contract addresses](/docs/HyperIndex/wildcard-indexing#index-all-erc20-transfers-to-your-contract) (eg Index all ERC20 transfers to/from your Contract) | ||
| - [Access Contract State](/docs/HyperIndex/contract-state) directly from handlers | ||
| - Perform external calls from handlers by following the [IPFS Integration guide](/docs/HyperIndex/ipfs) | ||
| - Optimise database access with [Loaders](/docs/HyperIndex/loaders) |
DZakh
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Apr 2, 2025
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| - `event.block` – Block fields (By default: `number`, `timestamp`, `hash`). | ||
| - `event.transaction` – Transaction fields (eg `hash`, `gasUsed`, etc. Empty by default). | ||
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| :::note | ||
| Configure block and transaction fields with [`field_selection`](/docs/HyperIndex/configuration-file#field-selection) in your `config.yaml` file. | ||
| ::: |
DZakh
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Apr 2, 2025
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| <TabItem value="typescript" label="TypeScript"> | ||
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| ```javascript | ||
| ```typescript | ||
| const pool = await context.Pool.get(poolId); |
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Made TypeScript the default
DZakh
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Apr 2, 2025
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| import { Greeter, User } from "generated"; | ||
| The context object also provides a logger that you can use to log messages to the console. Compared to `console.log` calls, these logs will be displayed on our [Hosted Service](/docs/HyperIndex/hosted-service) runtime logs page. |
DZakh
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Apr 2, 2025
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| - **[Node.js](https://nodejs.org/en/download/current)** _(v18 or newer recommended)_ | ||
| - **[pnpm](https://pnpm.io/installation)** _(v8 or newer)_ | ||
| - **[Docker Desktop](https://www.docker.com/products/docker-desktop/)** _(required to run the Envio indexer locally)_ | ||
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| You'll also need to install the Envio CLI: | ||
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| ```bash | ||
| npm i -g envio | ||
| ``` | ||
| > **Note:** Docker is specifically required to run your indexer locally. You can skip Docker installation if you plan only to use Envio's hosted service. |
moose-code
reviewed
Apr 2, 2025
| - parentHash | ||
| ``` | ||
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| Try to use this option sparingly as it can cause redundant Data Source calls and increased credits usage. |
moose-code
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Apr 2, 2025
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Awesome!!! Lots of really good changes
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