use query storage helper

[shunjizhan]

Change

Using api to query storage still has the memory issue polkadot-js/api#5981, so we switch back to the original query storage helper, but removed all cache for storage query. This is because there was a bug in the cache, and as we mentioned in #1039, caching storage won't be too useful.

We still keep the blockHash => { blockNumber, Header, BlockData } cache introduced in #1039 , which are commonly used. We keep the apiAt cache as well, which can speed up runtime calls.

fix #1059

Although there is a small inconsistency when querying system.account compared to apiAt.query, it does not affect our use case (we have been using this for a long time anyways). But in the future it would be nice to make it better, maybe @ntduan can take a look at #1060 when you got a chance?

Test

all tests still pass (except the skipped one for storage query helper)

[zjb0807]

I don't seem to see the changes related to #1052

[shunjizhan]

yeah #1052 is not related, it might be some docker issue, let's keep that issue open for now

[codecov]

Codecov Report

Attention: Patch coverage is 96.87500% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.15%. Comparing base (ce8fd1d) to head (30b256a).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/eth-providers/src/utils/queryStoarge.ts	95.23%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1051      +/-   ##
==========================================
+ Coverage   74.51%   78.15%   +3.63%     
==========================================
  Files          55       56       +1     
  Lines        3178     2737     -441     
  Branches      808      624     -184     
==========================================
- Hits         2368     2139     -229     
+ Misses        786      585     -201     
+ Partials       24       13      -11     

Files with missing lines	Coverage Δ
packages/eth-providers/src/base-provider.ts	83.53% <100.00%> (+10.66%)	⬆️
packages/eth-providers/src/utils/parseBlock.ts	95.40% <100.00%> (-0.21%)	⬇️
packages/eth-providers/src/utils/queryStoarge.ts	95.23% <95.23%> (ø)

... and 4 files with indirect coverage changes