feat: add initGenesis

Signed-off-by: 170210 <j170210@icloud.com>

x/ERRORS.md

@@ -177,7 +177,7 @@
 
 |Error Name|Codespace|Code|Description|
 |:-|:-|:-|:-|
-|ErrSample|fswap|1100|sample error|
+|ErrParamsNotFound|fswap|1100|params does not exist|
 
 >You can also find detailed information in the following Errors.go files:
   * [fswap/types/errors.go](fswap/types/errors.go)

x/fswap/keeper/genesis.go

@@ -0,0 +1,40 @@
+package keeper
+
+import (
+	sdk "github.com/Finschia/finschia-sdk/types"
+	"github.com/Finschia/finschia-sdk/x/fswap/types"
+)
+
+const (
+	DefaultOldCoins string = "cony"
+)
+
+var (
+	DefaultSwapRate = sdk.NewDecWithPrec(148079656, 6)
+)
+
+// InitGenesis initializes the capability module's state from a provided genesis
+// state.
+func (k Keeper) InitGenesis(ctx sdk.Context, bk types.BankKeeper, genState types.GenesisState) error {
+	if err := k.SetParams(ctx, genState.Params); err != nil {
+		return err
+	}
+	if err := k.SetSwapped(ctx, genState.Swapped); err != nil {
+		return err
+	}
+	totalOldCoinsSupply := bk.GetSupply(ctx, DefaultOldCoins).Amount
+	totalNewCoinsSupply := DefaultSwapRate.MulInt(totalOldCoinsSupply)
+	totalNewCoins := sdk.NewDecCoinFromDec(genState.Params.NewCoinDenom, totalNewCoinsSupply)
+	if err := k.SetTotalSupply(ctx, totalNewCoins); err != nil {
+		return err
+	}
+	return nil
+}
+
+// ExportGenesis returns the capability module's exported genesis.
+func (k Keeper) ExportGenesis(ctx sdk.Context) *types.GenesisState {
+	return &types.GenesisState{
+		Params:  k.GetParams(ctx),
+		Swapped: k.GetSwapped(ctx),
+	}
+}

x/fswap/keeper/genesis_test.go

@@ -0,0 +1 @@
+package keeper_test

x/fswap/module.go

@@ -149,14 +149,14 @@ func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, gs json.Ra
 	// Initialize global index to index in genesis state
 	cdc.MustUnmarshalJSON(gs, &genState)
 
-	InitGenesis(ctx, am.keeper, genState)
+	am.keeper.InitGenesis(ctx, am.bankKeeper, genState)
 
 	return []abci.ValidatorUpdate{}
 }
 
 // ExportGenesis returns the capability module's exported genesis state as raw JSON bytes.
 func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage {
-	genState := ExportGenesis(ctx, am.keeper)
+	genState := am.keeper.ExportGenesis(ctx)
 	return cdc.MustMarshalJSON(genState)
 }
 

x/fswap/types/errors.go

@@ -8,5 +8,5 @@ import (
 
 // x/fswap module sentinel errors
 var (
-	ErrSample = sdkerrors.Register(ModuleName, 1100, "sample error")
+	ErrParamsNotFound = sdkerrors.Register(ModuleName, 1100, "params does not exist")
 )

x/fswap/types/expected_keepers.go

@@ -15,4 +15,5 @@ type AccountKeeper interface {
 type BankKeeper interface {
 	SpendableCoins(ctx sdk.Context, addr sdk.AccAddress) sdk.Coins
 	// Methods imported from bank should be defined here
+	GetSupply(ctx sdk.Context, denom string) sdk.Coin
 }

x/fswap/types/genesis.go

@@ -1,24 +1,24 @@
 package types
 
-import (
-// this line is used by starport scaffolding # genesis/types/import
-)
-
-// DefaultIndex is the default capability global index
-const DefaultIndex uint64 = 1
-
 // DefaultGenesis returns the default Capability genesis state
 func DefaultGenesis() *GenesisState {
 	return &GenesisState{
-		// this line is used by starport scaffolding # genesis/types/default
-		Params: DefaultParams(),
+		Params:  DefaultParams(),
+		Swapped: DefaultSwapped(),
 	}
 }
 
 // Validate performs basic genesis state validation returning an error upon any
 // failure.
 func (gs GenesisState) Validate() error {
 	// this line is used by starport scaffolding # genesis/types/validate
+	if err := gs.Params.Validate(); err != nil {
+		return err
+	}
+
+	if err := gs.Swapped.Validate(); err != nil {
+		return err
+	}
 
-	return gs.Params.Validate()
+	return nil
 }