List Anchors RPC

[siradji]

What kind of PR is this?:

/kind feature

What this PR does / why we need it:

Implement listanchors RPC

Which issue(s) does this PR fixes?:

Fixes #48

Additional comments?:

[codeclimate]

Code Climate has analyzed commit d8fb11c and detected 0 issues on this pull request.

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
packages/jellyfish/dist/index.umd.js	22.35 KB (+0.11% 🔺)	447 ms (+0.11% 🔺)	179 ms (-7.43% 🔽)	626 ms

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[codecov]

Codecov Report

Merging #558 (d8fb11c) into main (c3e429d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #558   +/-   ##
=======================================
  Coverage   97.42%   97.43%           
=======================================
  Files         112      112           
  Lines        3299     3309   +10     
  Branches      407      408    +1     
=======================================
+ Hits         3214     3224   +10     
  Misses         85       85           

Impacted Files	Coverage Δ
...ages/jellyfish-api-core/src/category/masternode.ts	100.00% <100.00%> (ø)
...ellyfish-transaction/src/buffer/buffer_composer.ts	99.55% <0.00%> (-0.01%)	⬇️
packages/jellyfish-api-core/src/category/spv.ts	100.00% <0.00%> (ø)
packages/jellyfish-wallet-mnemonic/src/hd_node.ts	100.00% <0.00%> (ø)

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[siradji]

I want to write a test case that asserts the number of anchor that is returned when listAnchors RPC is called. I have tried creating anchors via spv_anchorrewards but no avail.
My questions are

• What is the difference between spv_listanchors and listanchors?
• Is there a away to create anchors so that i can make the assertion i outlined above?