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// Copyright 2019 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus 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 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 library. If not, see
// <http://www.gnu.org/licenses/>.
package dexcon
import (
"math/big"
"testing"
"github.com/stretchr/testify/suite"
"github.com/dexon-foundation/dexon/common"
"github.com/dexon-foundation/dexon/core/state"
"github.com/dexon-foundation/dexon/core/vm"
"github.com/dexon-foundation/dexon/crypto"
"github.com/dexon-foundation/dexon/ethdb"
"github.com/dexon-foundation/dexon/params"
)
type GovStateFetcher struct {
statedb *state.StateDB
}
func (g *GovStateFetcher) GetStateForConfigAtRound(_ uint64) *vm.GovernanceState {
return &vm.GovernanceState{g.statedb}
}
type DexconTestSuite struct {
suite.Suite
config *params.DexconConfig
memDB *ethdb.MemDatabase
stateDB *state.StateDB
s *vm.GovernanceState
}
func (d *DexconTestSuite) SetupTest() {
memDB := ethdb.NewMemDatabase()
stateDB, err := state.New(common.Hash{}, state.NewDatabase(memDB))
if err != nil {
panic(err)
}
d.memDB = memDB
d.stateDB = stateDB
d.s = &vm.GovernanceState{stateDB}
config := params.TestnetChainConfig.Dexcon
config.LockupPeriod = 1000
config.NextHalvingSupply = new(big.Int).Mul(big.NewInt(1e18), big.NewInt(2.5e9))
config.LastHalvedAmount = new(big.Int).Mul(big.NewInt(1e18), big.NewInt(1.5e9))
config.MiningVelocity = 0.1875
config.RoundLength = 3600
config.MinBlockInterval = 1000
d.config = config
// Give governance contract balance so it will not be deleted because of being an empty state object.
stateDB.AddBalance(vm.GovernanceContractAddress, big.NewInt(1))
// Genesis CRS.
crs := crypto.Keccak256Hash([]byte(config.GenesisCRSText))
d.s.SetCRS(crs)
// Round 0 height.
d.s.PushRoundHeight(big.NewInt(0))
// Governance configuration.
d.s.UpdateConfiguration(config)
d.stateDB.Commit(true)
}
func (d *DexconTestSuite) TestBlockRewardCalculation() {
consensus := New()
consensus.SetGovStateFetcher(&GovStateFetcher{d.stateDB})
d.s.IncTotalStaked(big.NewInt(1e18))
// blockReard = miningVelocity * totalStaked * roundInterval / aYear / numBlocksInCurRound
// 0.1875 * 1e18 * 3600 * 1000 / (86400 * 1000 * 365 * 3600) = 5945585996.96
d.Require().Equal(big.NewInt(5945585996), consensus.calculateBlockReward(0, d.stateDB))
}
func TestDexcon(t *testing.T) {
suite.Run(t, new(DexconTestSuite))
}
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