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@ceramicnetwork/anchor-listener
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$ npm install @ceramicnetwork/anchor-listener
import {
createBlockProofsListener,
createBlocksProofsLoader,
createAncestorBlocksProofsLoader,
} from '@ceramicnetwork/anchor-listener'
import { take, timeout } from 'rxjs'
// Listen to new block events on the provider and load anchor proofs
const subsription = createBlockProofsListener({ chainId: 'eip155:1', confirmations: 20, provider: ... }).subscribe({
next(event) {
// event contains the `block` and `proofs`
}
})
// Unsubscribe to stop listening
subscription.unsubscribe()
// Load proofs for a range of blocks
createBlocksProofsLoader({ chainId: 'eip155:1', fromBlock: 100, toBlock: 120, provider: ... }).subscribe({
next(event) {
// event contains the `block` and `proofs`
}
})
// Load proofs for blocks, walking up the parents until the expected ancestor hash is found
createAncestorBlocksProofsLoader({ chainId: 'eip155:1', initialBlock: 'latest', targetAncestorHash: '...', provider: ... }).pipe(
// Operators can be used to add stopping conditions
take(50), // attempt to load maximum 50 blocks
timeout(300_000), // timeout after 5 minutes
).subscribe({
next(event) {
// event contains the `block` and `proofs`
// unless interrupted, `block.parentHash` will be `targetAncestorHash` in the last event
}
})
Run tests:
npm test
Run linter:
npm run lint
We are happy to accept small and large contributions. Make sure to check out the Ceramic specifications for details of how the protocol works.
MIT or Apache-2.0
FAQs
Ceramic anchor events listener
The npm package @ceramicnetwork/anchor-listener receives a total of 2,138 weekly downloads. As such, @ceramicnetwork/anchor-listener popularity was classified as popular.
We found that @ceramicnetwork/anchor-listener demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 10 open source maintainers collaborating on the project.
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