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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"
"time"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
"github.com/dexon-foundation/dexon-consensus-core/simulation/config"
)
// simGovernance is a simulated governance contract implementing the
// core.Governance interface.
type simGovernance struct {
lock sync.RWMutex
notarySet map[types.ValidatorID]struct{}
expectedNumValidators int
k int
phiRatio float32
chainNum uint32
crs string
dkgComplaint map[uint64][]*types.DKGComplaint
dkgMasterPublicKey map[uint64][]*types.DKGMasterPublicKey
lambda time.Duration
}
// newSimGovernance returns a new simGovernance instance.
func newSimGovernance(
numValidators int, consensusConfig config.Consensus) *simGovernance {
return &simGovernance{
notarySet: make(map[types.ValidatorID]struct{}),
expectedNumValidators: numValidators,
k: consensusConfig.K,
phiRatio: consensusConfig.PhiRatio,
chainNum: consensusConfig.ChainNum,
crs: consensusConfig.GenesisCRS,
dkgComplaint: make(map[uint64][]*types.DKGComplaint),
dkgMasterPublicKey: make(map[uint64][]*types.DKGMasterPublicKey),
lambda: time.Duration(consensusConfig.Lambda) * time.Millisecond,
}
}
// GetNotarySet returns the current notary set.
func (g *simGovernance) GetNotarySet() map[types.ValidatorID]struct{} {
g.lock.RLock()
defer g.lock.RUnlock()
// Return the cloned notarySet.
ret := make(map[types.ValidatorID]struct{})
for k := range g.notarySet {
ret[k] = struct{}{}
}
return ret
}
// GetConfiguration returns the configuration at a given block height.
func (g *simGovernance) GetConfiguration(blockHeight uint64) *types.Config {
return &types.Config{
NumShards: 1,
NumChains: g.chainNum,
GenesisCRS: g.crs,
Lambda: g.lambda,
K: g.k,
PhiRatio: g.phiRatio,
}
}
// 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.notarySet[vID]; exists {
return
}
if len(g.notarySet) == g.expectedNumValidators {
panic(fmt.Errorf("attempt to add validator when ready"))
}
g.notarySet[vID] = struct{}{}
}
// AddDKGComplaint adds a DKGComplaint.
func (g *simGovernance) AddDKGComplaint(complaint *types.DKGComplaint) {
g.dkgComplaint[complaint.Round] = append(
g.dkgComplaint[complaint.Round], complaint)
}
// DKGComplaints returns the DKGComplaints of round.
func (g *simGovernance) DKGComplaints(round uint64) []*types.DKGComplaint {
complaints, exist := g.dkgComplaint[round]
if !exist {
return []*types.DKGComplaint{}
}
return complaints
}
// AddDKGMasterPublicKey adds a DKGMasterPublicKey.
func (g *simGovernance) AddDKGMasterPublicKey(
masterPublicKey *types.DKGMasterPublicKey) {
g.dkgMasterPublicKey[masterPublicKey.Round] = append(
g.dkgMasterPublicKey[masterPublicKey.Round], masterPublicKey)
}
// DKGMasterPublicKeys returns the DKGMasterPublicKeys of round.
func (g *simGovernance) DKGMasterPublicKeys(
round uint64) []*types.DKGMasterPublicKey {
masterPublicKeys, exist := g.dkgMasterPublicKey[round]
if !exist {
return []*types.DKGMasterPublicKey{}
}
return masterPublicKeys
}
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