Merge PR #1612: prevent zero power validators at genesis

CHANGELOG.md

@@ -129,6 +129,7 @@ BUG FIXES
 * \#1461 - CLI tests now no longer reset your local environment data
 * \#1505 - `gaiacli stake validator` no longer panics if validator doesn't exist
 * \#1565 - fix cliff validator persisting when validator set shrinks from max
+* \#1287 - prevent zero power validators at genesis
 * [x/stake] fix bug when unbonding/redelegating using `--shares-percent`
 * \#1010 - two validators can't bond with the same pubkey anymore
 

cmd/gaia/app/app.go

@@ -164,7 +164,11 @@ func (app *GaiaApp) initChainer(ctx sdk.Context, req abci.RequestInitChain) abci
 	}
 
 	// load the initial stake information
-	stake.InitGenesis(ctx, app.stakeKeeper, genesisState.StakeData)
+	err = stake.InitGenesis(ctx, app.stakeKeeper, genesisState.StakeData)
+	if err != nil {
+		panic(err) // TODO https://github.com/cosmos/cosmos-sdk/issues/468
+		// return sdk.ErrGenesisParse("").TraceCause(err, "")
+	}
 
 	gov.InitGenesis(ctx, app.govKeeper, gov.DefaultGenesisState())
 

cmd/gaia/cmd/gaiadebug/hack.go

@@ -228,8 +228,7 @@ func (app *GaiaApp) initChainer(ctx sdk.Context, req abci.RequestInitChain) abci
 	var genesisState gaia.GenesisState
 	err := app.cdc.UnmarshalJSON(stateJSON, &genesisState)
 	if err != nil {
-		panic(err) // TODO https://github.com/cosmos/cosmos-sdk/issues/468
-		// return sdk.ErrGenesisParse("").TraceCause(err, "")
+		panic(err) // TODO https://github.com/cosmos/cosmos-sdk/issues/468 // return sdk.ErrGenesisParse("").TraceCause(err, "")
 	}
 
 	// load the accounts
@@ -239,7 +238,10 @@ func (app *GaiaApp) initChainer(ctx sdk.Context, req abci.RequestInitChain) abci
 	}
 
 	// load the initial stake information
-	stake.InitGenesis(ctx, app.stakeKeeper, genesisState.StakeData)
-	return abci.ResponseInitChain{}
+	err = stake.InitGenesis(ctx, app.stakeKeeper, genesisState.StakeData)
+	if err != nil {
+		panic(err) // TODO https://github.com/cosmos/cosmos-sdk/issues/468 // return sdk.ErrGenesisParse("").TraceCause(err, "")
+	}
 
+	return abci.ResponseInitChain{}
 }

x/gov/test_common.go

@@ -61,7 +61,10 @@ func getInitChainer(mapp *mock.App, keeper Keeper, stakeKeeper stake.Keeper) sdk
 		stakeGenesis := stake.DefaultGenesisState()
 		stakeGenesis.Pool.LooseTokens = 100000
 
-		stake.InitGenesis(ctx, stakeKeeper, stakeGenesis)
+		err := stake.InitGenesis(ctx, stakeKeeper, stakeGenesis)
+		if err != nil {
+			panic(err)
+		}
 		InitGenesis(ctx, keeper, DefaultGenesisState())
 		return abci.ResponseInitChain{}
 	}

x/slashing/app_test.go

@@ -55,7 +55,10 @@ func getInitChainer(mapp *mock.App, keeper stake.Keeper) sdk.InitChainer {
 		mapp.InitChainer(ctx, req)
 		stakeGenesis := stake.DefaultGenesisState()
 		stakeGenesis.Pool.LooseTokens = 100000
-		stake.InitGenesis(ctx, keeper, stakeGenesis)
+		err := stake.InitGenesis(ctx, keeper, stakeGenesis)
+		if err != nil {
+			panic(err)
+		}
 		return abci.ResponseInitChain{}
 	}
 }

x/slashing/test_common.go

@@ -64,7 +64,9 @@ func createTestInput(t *testing.T) (sdk.Context, bank.Keeper, stake.Keeper, Keep
 	sk := stake.NewKeeper(cdc, keyStake, ck, stake.DefaultCodespace)
 	genesis := stake.DefaultGenesisState()
 	genesis.Pool.LooseTokens = initCoins.MulRaw(int64(len(addrs))).Int64()
-	stake.InitGenesis(ctx, sk, genesis)
+	err = stake.InitGenesis(ctx, sk, genesis)
+	require.Nil(t, err)
+
 	for _, addr := range addrs {
 		_, _, err = ck.AddCoins(ctx, addr, sdk.Coins{
 			{sk.GetParams(ctx).BondDenom, initCoins},

x/stake/app_test.go

@@ -65,7 +65,10 @@ func getInitChainer(mapp *mock.App, keeper Keeper) sdk.InitChainer {
 		stakeGenesis := DefaultGenesisState()
 		stakeGenesis.Pool.LooseTokens = 100000
 
-		InitGenesis(ctx, keeper, stakeGenesis)
+		err := InitGenesis(ctx, keeper, stakeGenesis)
+		if err != nil {
+			panic(err)
+		}
 
 		return abci.ResponseInitChain{}
 	}

x/stake/genesis.go

@@ -3,6 +3,7 @@ package stake
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/stake/types"
+	"github.com/pkg/errors"
 	tmtypes "github.com/tendermint/tendermint/types"
 )
 
@@ -11,7 +12,7 @@ import (
 // validator in the keeper along with manually setting the indexes. In
 // addition, it also sets any delegations found in data. Finally, it updates
 // the bonded validators.
-func InitGenesis(ctx sdk.Context, keeper Keeper, data types.GenesisState) {
+func InitGenesis(ctx sdk.Context, keeper Keeper, data types.GenesisState) error {
 	keeper.SetPool(ctx, data.Pool)
 	keeper.SetNewParams(ctx, data.Params)
 	keeper.InitIntraTxCounter(ctx)
@@ -19,6 +20,13 @@ func InitGenesis(ctx sdk.Context, keeper Keeper, data types.GenesisState) {
 	for _, validator := range data.Validators {
 		keeper.SetValidator(ctx, validator)
 
+		if validator.PoolShares.Amount.IsZero() {
+			return errors.Errorf("genesis validator cannot have zero pool shares, validator: %v", validator)
+		}
+		if validator.DelegatorShares.IsZero() {
+			return errors.Errorf("genesis validator cannot have zero delegator shares, validator: %v", validator)
+		}
+
 		// Manually set indexes for the first time
 		keeper.SetValidatorByPubKeyIndex(ctx, validator)
 		keeper.SetValidatorByPowerIndex(ctx, validator, data.Pool)
@@ -33,6 +41,7 @@ func InitGenesis(ctx sdk.Context, keeper Keeper, data types.GenesisState) {
 	}
 
 	keeper.UpdateBondedValidatorsFull(ctx)
+	return nil
 }
 
 // WriteGenesis returns a GenesisState for a given context and keeper. The

x/stake/genesis_test.go

@@ -0,0 +1,37 @@
+package stake
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	keep "github.com/cosmos/cosmos-sdk/x/stake/keeper"
+	"github.com/cosmos/cosmos-sdk/x/stake/types"
+)
+
+func TestInitGenesis(t *testing.T) {
+	ctx, _, keeper := keep.CreateTestInput(t, false, 1000)
+
+	pool := keeper.GetPool(ctx)
+	pool.UnbondedTokens = 1
+	pool.UnbondedShares = sdk.OneRat()
+
+	params := keeper.GetParams(ctx)
+	var delegations []Delegation
+
+	validators := []Validator{
+		NewValidator(keep.Addrs[0], keep.PKs[0], Description{Moniker: "hoop"}),
+	}
+
+	genesisState := types.NewGenesisState(pool, params, validators, delegations)
+	err := InitGenesis(ctx, keeper, genesisState)
+	require.Error(t, err)
+
+	validators[0].PoolShares.Amount = sdk.OneRat()
+	validators[0].DelegatorShares = sdk.OneRat()
+
+	genesisState = types.NewGenesisState(pool, params, validators, delegations)
+	err = InitGenesis(ctx, keeper, genesisState)
+	require.NoError(t, err)
+}