feat: update inflation following mint param change proposal passed (#432

)

## Description

Closes: #XXXX



---
Test: 
- parse block 4114861 for getting proposal 15
- parse block 4213603 when the proposal is passed, the inflation will be updated

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch
- [ ] provided a link to the relevant issue or specification
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## Unreleased
 ### Changes
+#### Mint module
+- ([\#432](https://github.com/forbole/bdjuno/pull/432)) Update inflation rate when mint param change proposal is passed
+
 #### Gov module
 - ([\#401](https://github.com/forbole/bdjuno/pull/401)) Update the proposal status to the latest in `bdjuno parse gov proposal [id]` command
 - ([\#430](https://github.com/forbole/bdjuno/pull/430)) Update the proposals that have invalid status but can still be in voting or deposit periods 

modules/gov/expected_modules.go

@@ -17,6 +17,7 @@ type DistrModule interface {
 
 type MintModule interface {
 	UpdateParams(height int64) error
+	UpdateInflation() error
 }
 
 type SlashingModule interface {

modules/gov/utils_proposal.go

@@ -121,6 +121,12 @@ func (m *Module) handleParamChangeProposal(height int64, proposal govtypes.Propo
 			if err != nil {
 				return fmt.Errorf("error while updating ParamChangeProposal %s params : %s", minttypes.ModuleName, err)
 			}
+
+			// Update the inflation
+			err = m.mintModule.UpdateInflation()
+			if err != nil {
+				return fmt.Errorf("error while updating inflation with ParamChangeProposal: %s", err)
+			}
 		case slashingtypes.ModuleName:
 			err = m.slashingModule.UpdateParams(height)
 			if err != nil {

modules/mint/handle_periodic_operations.go

@@ -13,7 +13,7 @@ func (m *Module) RegisterPeriodicOperations(scheduler *gocron.Scheduler) error {
 
 	// Setup a cron job to run every midnight
 	if _, err := scheduler.Every(1).Day().At("00:00").Do(func() {
-		utils.WatchMethod(m.updateInflation)
+		utils.WatchMethod(m.UpdateInflation)
 	}); err != nil {
 		return err
 	}
@@ -23,7 +23,7 @@ func (m *Module) RegisterPeriodicOperations(scheduler *gocron.Scheduler) error {
 
 // updateInflation fetches from the REST APIs the latest value for the
 // inflation, and saves it inside the database.
-func (m *Module) updateInflation() error {
+func (m *Module) UpdateInflation() error {
 	log.Debug().
 		Str("module", "mint").
 		Str("operation", "inflation").