revert: Revert "feat: staking config (#10988)" (#11446)

* Revert "feat: staking config (#10988)"

This reverts commit 5e9656f363.

* remove docs

types/module/module.go

@@ -335,7 +335,7 @@ func (m *Manager) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, genesisData
 
 	// a chain must initialize with a non-empty validator set
 	if len(validatorUpdates) == 0 {
-		panic(fmt.Sprintf("validator set is empty after InitGenesis, please ensure at least one validator is initialized with a delegation greater than or equal to the DefaultPowerReduction, found in x/staking/types/config.go"))
+		panic(fmt.Sprintf("validator set is empty after InitGenesis, please ensure at least one validator is initialized with a delegation greater than or equal to the DefaultPowerReduction (%d)", sdk.DefaultPowerReduction))
 	}
 
 	return abci.ResponseInitChain{

types/staking.go

@@ -17,3 +17,16 @@ const (
 	// https://tendermint.com/docs/spec/abci/apps.html#endblock
 	ValidatorUpdateDelay int64 = 1
 )
+
+// DefaultPowerReduction is the default amount of staking tokens required for 1 unit of consensus-engine power
+var DefaultPowerReduction = NewIntFromUint64(1000000)
+
+// TokensToConsensusPower - convert input tokens to potential consensus-engine power
+func TokensToConsensusPower(tokens Int, powerReduction Int) int64 {
+	return (tokens.Quo(powerReduction)).Int64()
+}
+
+// TokensFromConsensusPower - convert input power to tokens
+func TokensFromConsensusPower(power int64, powerReduction Int) Int {
+	return NewInt(power).Mul(powerReduction)
+}

types/staking_test.go

@@ -0,0 +1,26 @@
+package types_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+type stakingTestSuite struct {
+	suite.Suite
+}
+
+func TestStakingTestSuite(t *testing.T) {
+	suite.Run(t, new(stakingTestSuite))
+}
+
+func (s *stakingTestSuite) SetupSuite() {
+	s.T().Parallel()
+}
+
+func (s *stakingTestSuite) TestTokensToConsensusPower() {
+	s.Require().Equal(int64(0), sdk.TokensToConsensusPower(sdk.NewInt(999_999), sdk.DefaultPowerReduction))
+	s.Require().Equal(int64(1), sdk.TokensToConsensusPower(sdk.NewInt(1_000_000), sdk.DefaultPowerReduction))
+}