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feat: use FallbackProvider in the DTL#1393

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tynes merged 1 commit intodevelopfrom
sc/use-fallback-provider
Oct 1, 2021
Merged

feat: use FallbackProvider in the DTL#1393
tynes merged 1 commit intodevelopfrom
sc/use-fallback-provider

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Description
Replaces StaticJsonRpcProvider with FallbackProvider so we can run multiple nodes and get a consensus of results from each.

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changeset-bot bot commented Aug 26, 2021

🦋 Changeset detected

Latest commit: e0be02e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages
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@eth-optimism/core-utils Patch
@eth-optimism/data-transport-layer Patch

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@smartcontracts smartcontracts marked this pull request as draft August 26, 2021 19:12
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@tynes tynes force-pushed the sc/use-fallback-provider branch from 7fb268f to 6d9ca23 Compare September 8, 2021 20:14
@github-actions github-actions bot added the A-pkg-core-utils Area: packages/core-utils label Sep 8, 2021
@tynes tynes marked this pull request as ready for review September 8, 2021 20:14
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tynes commented Sep 8, 2021

CI is generally failing here, need to investigate as to why

@tynes tynes force-pushed the sc/use-fallback-provider branch 2 times, most recently from 79f8a4c to 078a041 Compare September 21, 2021 21:46
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tynes commented Sep 21, 2021

cc @smartcontracts this is ready for review again

const provider = new ethers.providers.StaticJsonRpcProvider(url)
providers.push(provider)
}
return new ethers.providers.FallbackProvider(providers)
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looks good - note here that we can further parameterize things like weights of different providers by providing an array of FallbackProviderConfig instead.

FallbackProviderConfig. If a Provider is provided, the defaults are a priority of 1 and a weight of 1.

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https://github.com/ethers-io/ethers.js/blob/c2c0ce75039e7256b287f9a764188d08ed0b7296/packages/providers/src.ts/fallback-provider.ts#L97

The existing implementation will randomize which is used. We could set the priority based on the order of URLs passed in

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Does this do quorum by default?

Allow the DTL to sync from multiple web3 backends using
the `ethers.providers.FallbackProvider`. Multiple URLs
can be passed through as a comma delimited string to
configure multiple providers.

A helper function is added to `core-utils` to allow
easy configuration between services. This PR only introduces
the usage of the fallback provider into the DTL. In the
future, it should be added to other services that query L1
as well.
@tynes tynes force-pushed the sc/use-fallback-provider branch from 078a041 to e0be02e Compare September 30, 2021 17:15
import { Provider } from '@ethersproject/providers'

// Copied from @ethersproject/providers since it is not
// currently exported
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PR to export the interface here: ethers-io/ethers.js#2121

@tynes tynes merged commit 85a1fea into develop Oct 1, 2021
@tynes tynes deleted the sc/use-fallback-provider branch October 1, 2021 20:20
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3 participants