feat(sidecar-extensibility): detect upgradeable contracts and pull ABIs from IPFS

[serichoi65]

In order to side-load contracts to Sidecar, we want to add the following features:

• Detecting an upgradeable contract when we process transaction logs
  • This will not be applicable to EigenLayers' core contracts but only to side-loaded contracts to automatically update contract ABIs
  • This function is not being called in this PR
• Pulling ABIs from IPFS (main source)
  • The contract metadata needs to exist in IPFS in order for us to pull ABIs. Added 10 seconds timeout during HTTP Get
  • TODO: add a fallback source to pull the data from Etherscan

Non-feature updates:

• Added AbiFetcher as a new input to ContractManager
• All tests, except pipelineIntegration_test and restakedStrategies_test, should use a non-paid quiknode url address
• Updated the ethereum NewClient parameter with http.Client to accept mocked client

References: #223

[non-fungible-nelson]

Hi seri - great PR! Can we have a description please?

[seanmcgary]

@serichoi65 I'll let you fill in the PR body with implementation specifics.

@non-fungible-nelson I added a link to the related github issue this addresses

[seanmcgary]

This should definitely be taken as a config value that can be overridden at runtime.

[seanmcgary]

To make things testable, an http client reference should probably be passed to the NewAbiFetcher. That way you could pass in a mocked client.

[seanmcgary]

Naming is a little funky since this returns the ABI not the metadata

[serichoi65]

It returns bytecodeHash and ABI that I called it metadata, but do you prefer it to be FetchABIFromAddress?

[seanmcgary]

Since we want to add Etherscan later (or even other options), I would refactor this a little bit into two components:

type AbiFetcher interface {
	GetContractAbiAndMetadata(ctx context.Context, address string) (string, error)
}

type IAbiSource interface {
	FetchAbi(ctx context.Context, address string, bytecode string) (string, error)
}

Move all of the IPFS logic into an implementation of IAbiSource and have the current AbiFetcher take a list of IAbiSources when created. Then all you need to do is iterate over the list in order until you find an ABI or error out.

[serichoi65]

I'll refactor this in the PR when I add Etherscan