Add Polygon zkEVM batches fetcher

[varasev]

Motivation

This PR adds an indexer (fetcher) for Polygon zkEVM (Hermez) transaction batches and the corresponding pages and fields to API v2.

These changes are inspired by https://zkevm.polygonscan.com/ functionality in part of displaying transaction batches.

Note that it doesn't include the corresponding changes for old UI.

The fetcher uses zkevm_batchNumber, zkevm_virtualBatchNumber, zkevm_verifiedBatchNumber, and zkevm_getBatchByNumber RPC requests (documented here).

For API v2 there are following changes:

• transaction page is extended to display the batch index (the transaction is bound with), sequence tx hash, verify tx hash, and zkevm status of the transaction. Example: https://zkevm.polygonscan.com/tx/0xa9edf4ca55b437c8db15d84f7129a37324b0ffe59fe5337e23b2e91d11e0e603. Example of API v2 request: http://localhost:4000/api/v2/transactions/0xa9edf4ca55b437c8db15d84f7129a37324b0ffe59fe5337e23b2e91d11e0e603
• batch info page was added to let users see the batch parameters (except Verify Block Number field). Example: https://zkevm.polygonscan.com/batch/10470. Example of API v2 request: http://localhost:4000/api/v2/zkevm/batches/10470
• list of batches was added like in https://zkevm.polygonscan.com/batches (except Verify Block field). Example of API v2 request: http://localhost:4000/api/v2/zkevm/batches (and http://localhost:4000/api/v2/zkevm/batches/count)
• ❓ Latest Confirmed Batches homepage section was added. Example: https://zkevm.polygonscan.com/. Example of API v2 request: http://localhost:4000/api/v2/main-page/zkevm/batches/confirmed
• Latest Batch homepage section was added. Example: https://zkevm.polygonscan.com/. Example of API v2 request: http://localhost:4000/api/v2/main-page/zkevm/batches/latest-number
• list of transactions bound to the specified batch. Example: https://zkevm.polygonscan.com/txs?batch=22102. Example of API v2 request: http://localhost:4000/api/v2/transactions/zkevm-batch/22102

To enable/disable the fetcher, one need to use INDEXER_ZKEVM_BATCHES_ENABLED=true env variable. To test the fetcher, the public RPC https://zkevm-rpc.com can be used.

The new UI will need to have the following new pages and items (see the examples above):

• additional fields on transaction page
• Sequencer field on Block page (the value can be taken from miner field). Example: https://zkevm.polygonscan.com/block/510844
• Sequencer field on Block list page (the value can be taken from miner field). Example: https://zkevm.polygonscan.com/blocks
• Batch info page
• Batches page
• Latest Confirmed Batches (❓) and Latest Batch homepage sections
• the page displaying list of transactions filtered by batch number like here: https://zkevm.polygonscan.com/txs?batch=22102

Checklist for your Pull Request (PR)

• 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 by submitting a PR Add env variables and update sharelock.md for Polygon zkEVM batches fetcher docs#161
• If I added/changed/removed ENV var, I submitted a PR to https://github.com/blockscout/docs to update the list of env vars at https://github.com/blockscout/docs/blob/master/for-developers/information-and-settings/env-variables.md and I updated the version to master in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables.
• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools

[vbaranov]

@varasev please rebase the current branch to the master branch.

[varasev]

@vbaranov Done

[vbaranov]

@varasev please rebase onto master branch

[varasev]

@varasev please rebase onto master branch

Done

[vbaranov]

@varasev web tests are failing https://github.com/blockscout/blockscout/actions/runs/6614170606/job/17966222220?pr=7584

Invalid call found at 2 locations:
  lib/block_scout_web/controllers/api/v2/zkevm_controller.ex:66: BlockScoutWeb.API.V2.ZkevmController.batches/2
  lib/block_scout_web/controllers/api/v2/zkevm_controller.ex:99: BlockScoutWeb.API.V2.ZkevmController.batches_confirmed/2

[vbaranov]

@varasev and please move Changelog entry to the current chapter.

[varasev]

@vbaranov all fixed