feat(x/mint): Add max supply param

x/mint/CHANGELOG.md

@@ -27,6 +27,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
+* [19896](https://github.com/cosmos/cosmos-sdk/pull/19896) Added a new max supply genesis param to existing params.
+
 ### Improvements
 
 ### API Breaking Changes

x/mint/README.md

@@ -137,14 +137,15 @@ BlockProvision(params Params) sdk.Coin {
 
 The minting module contains the following parameters:
 
-| Key                 | Type            | Example                |
-|---------------------|-----------------|------------------------|
-| MintDenom           | string          | "uatom"                |
-| InflationRateChange | string (dec)    | "0.130000000000000000" |
-| InflationMax        | string (dec)    | "0.200000000000000000" |
-| InflationMin        | string (dec)    | "0.070000000000000000" |
-| GoalBonded          | string (dec)    | "0.670000000000000000" |
-| BlocksPerYear       | string (uint64) | "6311520"              |
+| Key                 | Type             | Example                |
+|---------------------|------------------|------------------------|
+| MintDenom           | string           | "uatom"                |
+| InflationRateChange | string (dec)     | "0.130000000000000000" |
+| InflationMax        | string (dec)     | "0.200000000000000000" |
+| InflationMin        | string (dec)     | "0.070000000000000000" |
+| GoalBonded          | string (dec)     | "0.670000000000000000" |
+| BlocksPerYear       | string (uint64)  | "6311520"              |
+| MaxSupply           | string (math.Int)| "0"                    |
 
 
 ## Events
@@ -306,7 +307,8 @@ Example Output:
     "inflationMax": "200000000000000000",
     "inflationMin": "70000000000000000",
     "goalBonded": "670000000000000000",
-    "blocksPerYear": "6311520"
+    "blocksPerYear": "6311520",
+    "maxSupply": "0",
   }
 }
 ```
@@ -377,7 +379,8 @@ Example Output:
     "inflationMax": "200000000000000000",
     "inflationMin": "70000000000000000",
     "goalBonded": "670000000000000000",
-    "blocksPerYear": "6311520"
+    "blocksPerYear": "6311520",
+    "maxSupply": "0",
   }
 }
 ```

x/mint/keeper/migrator.go

@@ -21,3 +21,9 @@ func NewMigrator(k Keeper) Migrator {
 func (m Migrator) Migrate1to2(ctx context.Context) error {
 	return nil
 }
+
+// Migrate2to3 migrates the x/mint module state from the consensus version 2 to
+// version 3.
+func (m Migrator) Migrate2to3(ctx context.Context) error {
+	return nil
+}

x/mint/module.go

@@ -21,7 +21,7 @@ import (
 )
 
 // ConsensusVersion defines the current x/mint module consensus version.
-const ConsensusVersion = 2
+const ConsensusVersion = 3
 
 var (
 	_ module.HasName             = AppModule{}
@@ -109,6 +109,10 @@ func (am AppModule) RegisterMigrations(mr appmodule.MigrationRegistrar) error {
 		return fmt.Errorf("failed to migrate x/%s from version 1 to 2: %w", types.ModuleName, err)
 	}
 
+	if err := mr.Register(types.ModuleName, 2, m.Migrate2to3); err != nil {
+		return fmt.Errorf("failed to migrate x/%s from version 2 to 3: %w", types.ModuleName, err)
+	}
+
 	return nil
 }