refactor(app)!: Remove x/stablecoin module (#1609)

* refactor: rm x/stablecoin

* changelog

* change log number

CHANGELOG.md

@@ -41,9 +41,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Features 
+
 * [#xxx](https://github.com/NibiruChain/nibiru/pull/xxx) - epic(tokenfactory):
   State transitions, collections, genesis import and export, and app wiring
 
+### State Breaking
+
+* [#1609](https://github.com/NibiruChain/nibiru/pull/1609) - refactor(app)!: Remove x/stablecoin module.
+
 ## [v0.21.10]
 
 ### Features

app/app.go

@@ -114,9 +114,6 @@ import (
 	"github.com/NibiruChain/nibiru/x/spot"
 	spotkeeper "github.com/NibiruChain/nibiru/x/spot/keeper"
 	spottypes "github.com/NibiruChain/nibiru/x/spot/types"
-	"github.com/NibiruChain/nibiru/x/stablecoin"
-	stablecoinkeeper "github.com/NibiruChain/nibiru/x/stablecoin/keeper"
-	stablecointypes "github.com/NibiruChain/nibiru/x/stablecoin/types"
 	"github.com/NibiruChain/nibiru/x/sudo"
 	"github.com/NibiruChain/nibiru/x/sudo/keeper"
 	sudotypes "github.com/NibiruChain/nibiru/x/sudo/types"
@@ -168,7 +165,6 @@ var (
 		spot.AppModuleBasic{},
 		oracle.AppModuleBasic{},
 		epochs.AppModuleBasic{},
-		stablecoin.AppModuleBasic{},
 		perpv2.AppModuleBasic{},
 		inflation.AppModuleBasic{},
 		sudo.AppModuleBasic{},
@@ -191,19 +187,17 @@ var (
 		oracletypes.ModuleName:         {},
 		ibctransfertypes.ModuleName:    {authtypes.Minter, authtypes.Burner},
 		ibcfeetypes.ModuleName:         {},
-		stablecointypes.ModuleName:     {authtypes.Minter, authtypes.Burner},
 
 		perptypesv2.ModuleName:           {},
 		perptypesv2.VaultModuleAccount:   {},
 		perptypesv2.PerpEFModuleAccount:  {},
 		perptypesv2.FeePoolModuleAccount: {},
 
-		epochstypes.ModuleName:                {},
-		stablecointypes.StableEFModuleAccount: {authtypes.Burner},
-		sudotypes.ModuleName:                  {},
-		common.TreasuryPoolModuleAccount:      {},
-		wasm.ModuleName:                       {authtypes.Burner},
-		tokenfactorytypes.ModuleName:          {authtypes.Minter, authtypes.Burner},
+		epochstypes.ModuleName:           {},
+		sudotypes.ModuleName:             {},
+		common.TreasuryPoolModuleAccount: {},
+		wasm.ModuleName:                  {authtypes.Burner},
+		tokenfactorytypes.ModuleName:     {authtypes.Minter, authtypes.Burner},
 	}
 )
 
@@ -278,7 +272,6 @@ type NibiruApp struct {
 	PerpKeeperV2       perpkeeperv2.Keeper
 	SpotKeeper         spotkeeper.Keeper
 	OracleKeeper       oraclekeeper.Keeper
-	StablecoinKeeper   stablecoinkeeper.Keeper
 	InflationKeeper    inflationkeeper.Keeper
 	SudoKeeper         keeper.Keeper
 	DevGasKeeper       devgaskeeper.Keeper
@@ -628,7 +621,6 @@ func initParamsKeeper(
 	// Nibiru core params keepers | x/
 	paramsKeeper.Subspace(spottypes.ModuleName)
 	paramsKeeper.Subspace(epochstypes.ModuleName)
-	paramsKeeper.Subspace(stablecointypes.ModuleName)
 	paramsKeeper.Subspace(inflationtypes.ModuleName)
 	// ibc params keepers
 	paramsKeeper.Subspace(ibctransfertypes.ModuleName)

app/keepers.go

@@ -95,9 +95,6 @@ import (
 	"github.com/NibiruChain/nibiru/x/spot"
 	spotkeeper "github.com/NibiruChain/nibiru/x/spot/keeper"
 	spottypes "github.com/NibiruChain/nibiru/x/spot/types"
-	"github.com/NibiruChain/nibiru/x/stablecoin"
-	stablecoinkeeper "github.com/NibiruChain/nibiru/x/stablecoin/keeper"
-	stablecointypes "github.com/NibiruChain/nibiru/x/stablecoin/types"
 	"github.com/NibiruChain/nibiru/x/sudo"
 	"github.com/NibiruChain/nibiru/x/sudo/keeper"
 	sudotypes "github.com/NibiruChain/nibiru/x/sudo/types"
@@ -135,7 +132,6 @@ func initStoreKeys() (
 
 		// nibiru x/ keys
 		spottypes.StoreKey,
-		stablecointypes.StoreKey,
 		oracletypes.StoreKey,
 		epochstypes.StoreKey,
 		perpv2types.StoreKey,
@@ -146,7 +142,7 @@ func initStoreKeys() (
 		tokenfactorytypes.StoreKey,
 	)
 	tkeys = sdk.NewTransientStoreKeys(paramstypes.TStoreKey)
-	memKeys = sdk.NewMemoryStoreKeys(capabilitytypes.MemStoreKey, stablecointypes.MemStoreKey)
+	memKeys = sdk.NewMemoryStoreKeys(capabilitytypes.MemStoreKey)
 	return keys, tkeys, memKeys
 }
 
@@ -283,12 +279,6 @@ func (app *NibiruApp) InitKeepers(
 		app.AccountKeeper, app.BankKeeper, app.DistrKeeper, app.stakingKeeper, distrtypes.ModuleName,
 	)
 
-	app.StablecoinKeeper = stablecoinkeeper.NewKeeper(
-		appCodec, keys[stablecointypes.StoreKey], memKeys[stablecointypes.MemStoreKey],
-		app.GetSubspace(stablecointypes.ModuleName),
-		app.AccountKeeper, app.BankKeeper, app.OracleKeeper, app.SpotKeeper,
-	)
-
 	app.EpochsKeeper = epochskeeper.NewKeeper(
 		appCodec, keys[epochstypes.StoreKey],
 	)
@@ -309,7 +299,6 @@ func (app *NibiruApp) InitKeepers(
 
 	app.EpochsKeeper.SetHooks(
 		epochstypes.NewMultiEpochHooks(
-			app.StablecoinKeeper.Hooks(),
 			app.PerpKeeperV2.Hooks(),
 			app.InflationKeeper.Hooks(),
 			app.OracleKeeper.Hooks(),
@@ -520,7 +509,6 @@ func (app *NibiruApp) initAppModules(
 
 		// Nibiru modules
 		spot.NewAppModule(appCodec, app.SpotKeeper, app.AccountKeeper, app.BankKeeper),
-		stablecoin.NewAppModule(appCodec, app.StablecoinKeeper, app.AccountKeeper, app.BankKeeper, app.OracleKeeper),
 		oracle.NewAppModule(appCodec, app.OracleKeeper, app.AccountKeeper, app.BankKeeper),
 		epochs.NewAppModule(appCodec, app.EpochsKeeper),
 		perpv2.NewAppModule(appCodec, app.PerpKeeperV2, app.AccountKeeper, app.BankKeeper, app.OracleKeeper),
@@ -590,7 +578,6 @@ func orderedModuleNames() []string {
 		// --------------------------------------------------------------------
 		// Native x/ Modules
 		epochstypes.ModuleName,
-		stablecointypes.ModuleName,
 		spottypes.ModuleName,
 		oracletypes.ModuleName,
 		perpv2types.ModuleName,