hide decoded row if event is not decoded

[ayrat555]

fixes #2476

Motivation

Some logs events can not be decoded because matching function is not found in the contract's abi.
For example https://blockscout.com/eth/mainnet/address/0x1c527e27aa092c566cdfcc537faf5acc74a62ea0/logs
the same is happening in etherscan https://etherscan.io/address/0x1C527e27aA092c566cdFCC537Faf5acC74A62Ea0#events

Changelog

• hide decoded row if event is not decoded

[coveralls]

Pull Request Test Coverage Report for Build a5cfcadd-6573-4004-9980-7d409fda8c10

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 16 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 79.268%

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Files with Coverage Reduction	New Missed Lines	%
apps/indexer/lib/indexer/block/catchup/fetcher.ex	16	69.23%

Totals
Change from base Build 34a43d50-d2a8-4754-bcd6-df47fc2bb2c1:	0.003%
Covered Lines:	5154
Relevant Lines:	6502

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 3d31f9f5-d034-41de-901a-1ec59166bfaa

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.2%) to 79.235%

---

Files with Coverage Reduction	New Missed Lines	%
apps/block_scout_web/lib/block_scout_web/controllers/chain/market_history_chart_controller.ex	2	71.43%

Totals
Change from base Build dc58b1b4-eac8-4e56-be99-113b83e614ee:	0.2%
Covered Lines:	5155
Relevant Lines:	6506

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 2efe0fcd-5f79-4d54-bcad-814425739ea4

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 16 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 79.268%

---

Files with Coverage Reduction	New Missed Lines	%
apps/indexer/lib/indexer/block/catchup/fetcher.ex	16	69.23%

Totals
Change from base Build 34a43d50-d2a8-4754-bcd6-df47fc2bb2c1:	0.003%
Covered Lines:	5154
Relevant Lines:	6502

---

💛 - Coveralls

[vbaranov]

I don't think that hiding events is a good solution if we cannot decode it. A user should be able to see all events on contract. The issue is rather about how to increase the number of decoded events.

[ayrat555]

@vbaranov we won't hide event. We'll only hide empty 'Decoded' row

[vbaranov]

Ah, got it. I incorrectly interpreted the PR's description w/out before/after screenshots.