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The UMA SDK can be used to interact with UMA's Optimistic Oracle using an eventful client designed for a frontend dApp with global state management. To begin, install the SDK using the command:
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yarn add @uma/sdk
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Optimistic Oracle Client Usage
The below script is an example for getting request events from the Optimistic Oracle:
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import { ethers } from 'ethers'
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import uma from '@uma/sdk'
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// assume you have a url injected from env
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const provider = new ethers.providers.WebSocketProvider(process.env.CUSTOM_NODE_URL)
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// get the contract instance
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const contractAddress:string = "0xc43767f4592df265b4a9f1a398b97ff24f38c6a6" // update with optimistic oracle address you want to connect to
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const client:uma.clients.optimisticOracle.Instance = uma.clients.optimisticOracle.connect(contractAddress, provider)
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// gets all events using ethers query filter api
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async function events() {
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const events = await client.queryFilter({})
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// returns EventState, defined in the optimistic oracle client
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const state:uma.clients.optimisticOracle.EventState = uma.clients.optimisticOracle.getEventState(events)
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// see all requests given even details
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console.log(state.requests)
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}
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For more information using the SDK, go to the sdk package. Other useful resources are the following projects that use the UMA SDK:
- Optimistic Oracle dApp: a user interface for interacting with the Optimistic Oracle through price requests, proposals, and disputes.
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