[bank]: add balance tracking events

[fdymylja]

Description

This PR includes a state breaking change in events.

Specifically, there's the introduction of four new events which serve the purpose of tracking balance and supply changes.

• coin_spent: emitted every time a balance decreases (might be fees, burn because some balance decreases, coin send etc)
• coin_received: emitted every time a balance increases (coin send, mint because some balance increases, etc)
• coinbase: emitted when supply is increased
• burn: emitted when supply reduces

These events allow for full balance and supply tracking in the sdk, both in deliver tx, begin and endblock.

closes: #XXXX

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #8656 (ea4927a) into master (5d3f29b) will decrease coverage by 0.01%.
The diff coverage is 51.02%.

@@            Coverage Diff             @@
##           master    #8656      +/-   ##
==========================================
- Coverage   61.37%   61.36%   -0.02%     
==========================================
  Files         670      671       +1     
  Lines       38286    38324      +38     
==========================================
+ Hits        23499    23516      +17     
- Misses      12329    12350      +21     
  Partials     2458     2458              

Impacted Files	Coverage Δ
x/bank/types/events.go	0.00% <0.00%> (ø)
x/bank/keeper/view.go	88.60% <71.42%> (-0.87%)	⬇️
x/bank/keeper/send.go	75.00% <88.88%> (+1.36%)	⬆️
x/bank/keeper/keeper.go	73.96% <92.30%> (+1.46%)	⬆️

[tac0turtle]

utACK. Can you amend the spec/events file to contain the new events.

were you able to test this locally on a network?

[alessio]

@marbar3778 I don't think we tested it already on a simd testnet, but we'll give @helder-moreira a shout shortly. And let us know if you want to check something out once the network is up and running!

@fdymylja I think there are a few linter warnings that should be fixed

[fdymylja]

utACK. Can you amend the spec/events file to contain the new events.

on it

were you able to test this locally on a network?

tested locally, works for begin block, endblock events and normal txs with one or multiple messages (even when balance changes happen during ante handlers execution)

[fdymylja]

@alessio, @marbar3778

I've addressed the requested changes, please let me know if you feel there is anything else that needs to be adjusted

[tac0turtle]

thank you! looks good to me. Would be nice to test locally or on a server but shouldnt be a blocker

[alessio]

FTR @marbar3778 @fdymylja testing happens here:

RPC: https://simapp.app.alpha.starport.cloud/ or https://rpc.simapp.app.alpha.starport.cloud/
REST: https://rest.simapp.app.alpha.starport.cloud/
gRPC: https://grpc.simapp.app.alpha.starport.cloud/
p2p: 059821558fd8e04ff56084524e37ec7d5a3f497f@35.237.240.117:30843