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// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus-core library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.
package simulation
import (
"fmt"
"sync"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
"github.com/dexon-foundation/dexon-consensus-core/simulation/config"
"github.com/shopspring/decimal"
)
// simGovernance is a simulated governance contract implementing the
// core.Governance interface.
type simGovernance struct {
lock sync.RWMutex
validatorSet map[types.ValidatorID]decimal.Decimal
expectedNumValidators int
k int
phiRatio float32
crs string
agreementK int
}
// newSimGovernance returns a new simGovernance instance.
func newSimGovernance(
numValidators int, consensusConfig config.Consensus) *simGovernance {
return &simGovernance{
validatorSet: make(map[types.ValidatorID]decimal.Decimal),
expectedNumValidators: numValidators,
k: consensusConfig.K,
phiRatio: consensusConfig.PhiRatio,
crs: consensusConfig.Agreement.GenesisCRS,
agreementK: consensusConfig.Agreement.K,
}
}
// GetValidatorSet returns the validator set.
func (g *simGovernance) GetValidatorSet() (
ret map[types.ValidatorID]decimal.Decimal) {
g.lock.RLock()
defer g.lock.RUnlock()
// Return the cloned validatorSet.
ret = make(map[types.ValidatorID]decimal.Decimal)
for k, v := range g.validatorSet {
ret[k] = v
}
return
}
// GetTotalOrderingK returns K.
func (g *simGovernance) GetTotalOrderingK() int {
return g.k
}
// GetTotalOrderingK returns PhiRatio.
func (g *simGovernance) GetPhiRatio() float32 {
return g.phiRatio
}
// GetBlockProposingInterval returns block proposing interval.
func (g *simGovernance) GetBlockProposingInterval() int {
return 0
}
// GetConfigurationChangeEvent returns configuration change event since last
// epoch.
func (g *simGovernance) GetConfigurationChangeEvent(
epoch int) []types.ConfigurationChangeEvent {
return nil
}
// GetGenesisCRS returns CRS.
func (g *simGovernance) GetGenesisCRS() string {
return g.crs
}
// GetAgreementK returns K for agreement.
func (g *simGovernance) GetAgreementK() int {
return g.agreementK
}
// addValidator add a new validator into the simulated governance contract.
func (g *simGovernance) addValidator(vID types.ValidatorID) {
g.lock.Lock()
defer g.lock.Unlock()
if _, exists := g.validatorSet[vID]; exists {
return
}
if len(g.validatorSet) == g.expectedNumValidators {
panic(fmt.Errorf("attempt to add validator when ready"))
}
g.validatorSet[vID] = decimal.NewFromFloat(0)
}
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