genesis: Ensure no dup validators, or bonded and revoked validators

ref #2229

PENDING.md

@@ -95,7 +95,8 @@ IMPROVEMENTS
     * [x/auth] Signature verification's gas cost now accounts for pubkey type. [#2046](https://github.com/tendermint/tendermint/pull/2046)
     * [x/stake] [x/slashing] Ensure delegation invariants to jailed validators [#1883](https://github.com/cosmos/cosmos-sdk/issues/1883).
     * [x/stake] Improve speed of GetValidator, which was shown to be a performance bottleneck. [#2046](https://github.com/tendermint/tendermint/pull/2200)
-    * [genesis] \#2229 Ensure that there are no duplicate accounts in the genesis state.
+    * [genesis] \#2229 Ensure that there are no duplicate accounts or validators in the genesis state.
+
 * SDK
     * [tools] Make get_vendor_deps deletes `.vendor-new` directories, in case scratch files are present.
     * [spec] Added simple piggy bank distribution spec

cmd/gaia/app/genesis.go

@@ -13,6 +13,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/auth"
 	"github.com/cosmos/cosmos-sdk/x/gov"
 	"github.com/cosmos/cosmos-sdk/x/stake"
+	stakeTypes "github.com/cosmos/cosmos-sdk/x/stake/types"
 
 	"github.com/spf13/pflag"
 
@@ -241,6 +242,26 @@ func GaiaValidateGenesisState(genesisState GenesisState) (err error) {
 	if err != nil {
 		return
 	}
+	err = validateGenesisStateValidators(genesisState.StakeData.Validators)
+	if err != nil {
+		return
+	}
+	return
+}
+
+func validateGenesisStateValidators(validators []stakeTypes.Validator) (err error) {
+	addrMap := make(map[string]bool, len(validators))
+	for i := 0; i < len(validators); i++ {
+		val := validators[i]
+		strKey := string(val.ConsPubKey.Bytes())
+		if _, ok := addrMap[strKey]; ok {
+			return fmt.Errorf("Duplicate validator in genesis state: moniker %v, Address %v", val.Description.Moniker, val.ConsAddress())
+		}
+		if val.Jailed && val.Status == sdk.Bonded {
+			return fmt.Errorf("Validator is bonded and revoked in genesis state: moniker %v, Address %v", val.Description.Moniker, val.ConsAddress())
+		}
+		addrMap[strKey] = true
+	}
 	return
 }
 

cmd/gaia/app/genesis_test.go

@@ -6,11 +6,25 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth"
 	"github.com/cosmos/cosmos-sdk/x/gov"
-	stake "github.com/cosmos/cosmos-sdk/x/stake"
+	"github.com/cosmos/cosmos-sdk/x/stake"
+	stakeTypes "github.com/cosmos/cosmos-sdk/x/stake/types"
 	"github.com/stretchr/testify/require"
+	"github.com/tendermint/tendermint/crypto"
 	"github.com/tendermint/tendermint/crypto/ed25519"
 )
 
+var (
+	pk1   = ed25519.GenPrivKey().PubKey()
+	pk2   = ed25519.GenPrivKey().PubKey()
+	pk3   = ed25519.GenPrivKey().PubKey()
+	addr1 = sdk.ValAddress(pk1.Address())
+	addr2 = sdk.ValAddress(pk2.Address())
+	addr3 = sdk.ValAddress(pk3.Address())
+
+	emptyAddr   sdk.ValAddress
+	emptyPubkey crypto.PubKey
+)
+
 func makeGenesisState(genTxs []GaiaGenTx) GenesisState {
 	// start with the default staking genesis state
 	stakeData := stake.DefaultGenesisState()
@@ -63,13 +77,27 @@ func TestGaiaAppGenState(t *testing.T) {
 
 func TestGaiaGenesisValidation(t *testing.T) {
 	genTxs := make([]GaiaGenTx, 2)
-	privKey := ed25519.GenPrivKey()
-	pubKey := privKey.PubKey()
-	addr := pubKey.Address()
+	addr := pk1.Address()
 	// Test duplicate accounts fails
 	genTxs[0] = GaiaGenTx{"", sdk.AccAddress(addr), ""}
 	genTxs[1] = GaiaGenTx{"", sdk.AccAddress(addr), ""}
 	genesisState := makeGenesisState(genTxs)
 	err := GaiaValidateGenesisState(genesisState)
 	require.NotNil(t, err)
+	// Test bonded + revoked validator fails
+	genesisState = makeGenesisState(genTxs[:1])
+	val1 := stakeTypes.NewValidator(addr1, pk1, stakeTypes.Description{Moniker: "test #2"})
+	val1.Jailed = true
+	val1.Status = sdk.Bonded
+	genesisState.StakeData.Validators = append(genesisState.StakeData.Validators, val1)
+	err = GaiaValidateGenesisState(genesisState)
+	require.NotNil(t, err)
+	// Test duplicate validator fails
+	val1.Jailed = false
+	genesisState = makeGenesisState(genTxs[:1])
+	val2 := stakeTypes.NewValidator(addr1, pk1, stakeTypes.Description{Moniker: "test #3"})
+	genesisState.StakeData.Validators = append(genesisState.StakeData.Validators, val1)
+	genesisState.StakeData.Validators = append(genesisState.StakeData.Validators, val2)
+	err = GaiaValidateGenesisState(genesisState)
+	require.NotNil(t, err)
 }