feat: add eth_getLogs rpc endpoint

[zachdaniel]

Resolves #2016

Motivation

• This replicates the standard JSON RPC behavior of the eth_getLogs endpoint.

Changelog

Enhancements

• Add eth_getLogs endpoint to the eth copy api.

  • I added an entry to CHANGELOG.md with this PR
  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
  • I checked whether I should update the docs and did so if necessary

[coveralls]

Pull Request Test Coverage Report for Build 4162a842-d7d4-4405-8451-b6aed1f91989

• 67 of 78 (85.9%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.04%) to 80.901%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
apps/explorer/lib/explorer/etherscan/logs.ex	8	10	80.0%
apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/eth_controller.ex	59	63	93.65%
apps/explorer/lib/explorer/chain.ex	0	5	0.0%

Totals
Change from base Build bcffae98-c61e-4d56-b843-3765b216599c:	0.04%
Covered Lines:	4990
Relevant Lines:	6168

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💛 - Coveralls

[vbaranov]

@zachdaniel

I've got Internal server error on stg with the request:

curl -H "Content-type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"], "fromBlock": "0x79A2E3"}],"id":1}'

[vbaranov]

@zachdaniel when there is nothing to return in response, this method returns Params 'module' and 'action' are required parameters. For example,

curl -H "Content-type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"topics":["0x0000000000000000000000002f3aabb402bc175fe82890b9f9337a2e1fd5039c"], "fromBlock": "0x79A2E3"}],"id":1}' http://localhost:4000/api/eth_rpcc
{"status":"0","result":null,"message":"Params 'module' and 'action' are required parameters"}

[zachdaniel]

The url is misspelled, so it is trying to route you to the other RPC (the one that takes module and action). You have /api/eth_rpcc

[vbaranov]

Indeed, thanks!