Dynamic Fingerprint Configuration

[bowd]

Description

I can't take it anymore. We need to do a full release cycle every time we an SSL Fingerprint changes, and on top of that we've moved away from using leaf SSL fingerprints to do this less often, thus being less secure in practice.

This PR adds the long awaited dynamic configuration of SSL certificates from a global source of truth, and what better source of truth than a blockchain! So first head over to the new Oracle SSL Fingerprint Registry.

tl;dr SSLFingerprintRegistry is an HSM owned contract that keeps a mapping from Exchange ID to SSL Fingerprint to serve as a source of truth for the oracle client.

The implementation is quite simple, there as a new service (SSLFingerprintService) that reads all fingerprints from the chain, keeps them in mapping and subscribes to update events in order to update the mapping. The service is passed into the DataAggregator and ultimately each ExchangeAdaptor, there it's used to get the fingerprint in lieu of the static attribute.

Failure modes:

• Blockchain is down - oracle is down
• Websockets subscription for the update events dies - oracle restart will update fingerprints
• Somebody takes control of our HSM - highly unlikely but they would need to orchestrate a man-in-the-middle attack while updating the fingerprint registry, and taking control of the HSM amounts to taking control of our infrastructure access.

Other changes

N/A

Tested

• Unit tests
• Manual testing with on-chain updates

Related issues

90% of on-call requests.

Backwards compatibility

Nope.

[gitguardian]

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GitGuardian id	GitGuardian status	Secret	Commit	Filename
13147284	Triggered	Generic High Entropy Secret	89a89ea	test/app.test.ts	View secret

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[socket-security]

New dependencies detected. Learn more about Socket for GitHub ↗︎

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