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// Copyright 2018 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 dex
import (
"context"
"crypto/ecdsa"
"math/big"
coreTypes "github.com/dexon-foundation/dexon-consensus/core/types"
dkgTypes "github.com/dexon-foundation/dexon-consensus/core/types/dkg"
"github.com/dexon-foundation/dexon/common"
"github.com/dexon-foundation/dexon/core"
"github.com/dexon-foundation/dexon/core/types"
"github.com/dexon-foundation/dexon/core/vm"
"github.com/dexon-foundation/dexon/crypto"
"github.com/dexon-foundation/dexon/log"
"github.com/dexon-foundation/dexon/params"
)
type DexconGovernance struct {
*core.Governance
b *DexAPIBackend
chainConfig *params.ChainConfig
privateKey *ecdsa.PrivateKey
address common.Address
}
// NewDexconGovernance returns a governance implementation of the DEXON
// consensus governance interface.
func NewDexconGovernance(backend *DexAPIBackend, chainConfig *params.ChainConfig,
privKey *ecdsa.PrivateKey) *DexconGovernance {
g := &DexconGovernance{
Governance: core.NewGovernance(
core.NewGovernanceStateDB(backend.dex.BlockChain())),
b: backend,
chainConfig: chainConfig,
privateKey: privKey,
address: crypto.PubkeyToAddress(privKey.PublicKey),
}
return g
}
// DexconConfiguration return raw config in state.
func (d *DexconGovernance) DexconConfiguration(round uint64) *params.DexconConfig {
return d.GetStateForConfigAtRound(round).Configuration()
}
func (d *DexconGovernance) sendGovTx(ctx context.Context, data []byte) error {
gasPrice, err := d.b.SuggestPrice(ctx)
if err != nil {
return err
}
nonce, err := d.b.GetPoolNonce(ctx, d.address)
if err != nil {
return err
}
// Increase gasPrice to 10 times of suggested gas price to make sure it will
// be included in time.
gasPrice = new(big.Int).Mul(gasPrice, big.NewInt(10))
gasLimit, err := core.IntrinsicGas(data, false, false)
if err != nil {
return err
}
tx := types.NewTransaction(
nonce,
vm.GovernanceContractAddress,
big.NewInt(0),
gasLimit+vm.GovernanceActionGasCost,
gasPrice,
data)
signer := types.NewEIP155Signer(d.chainConfig.ChainID)
tx, err = types.SignTx(tx, signer, d.privateKey)
if err != nil {
return err
}
log.Info("Send governance transaction", "fullhash", tx.Hash().Hex(), "nonce", nonce)
return d.b.SendTx(ctx, tx)
}
func (d *DexconGovernance) Round() uint64 {
return d.b.CurrentBlock().Round()
}
// ProposeCRS send proposals of a new CRS
func (d *DexconGovernance) ProposeCRS(round uint64, signedCRS []byte) {
data, err := vm.PackProposeCRS(round, signedCRS)
if err != nil {
log.Error("failed to pack proposeCRS input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send proposeCRS tx", "err", err)
}
}
// AddDKGComplaint adds a DKGComplaint.
func (d *DexconGovernance) AddDKGComplaint(complaint *dkgTypes.Complaint) {
data, err := vm.PackAddDKGComplaint(complaint)
if err != nil {
log.Error("failed to pack addDKGComplaint input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send addDKGComplaint tx", "err", err)
}
}
// AddDKGMasterPublicKey adds a DKGMasterPublicKey.
func (d *DexconGovernance) AddDKGMasterPublicKey(masterPublicKey *dkgTypes.MasterPublicKey) {
data, err := vm.PackAddDKGMasterPublicKey(masterPublicKey)
if err != nil {
log.Error("failed to pack addDKGMasterPublicKey input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send addDKGMasterPublicKey tx", "err", err)
}
}
// AddDKGMPKReady adds a DKG mpk ready message.
func (d *DexconGovernance) AddDKGMPKReady(ready *dkgTypes.MPKReady) {
data, err := vm.PackAddDKGMPKReady(ready)
if err != nil {
log.Error("failed to pack addDKGMPKReady input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send addDKGMPKReady tx", "err", err)
}
}
// AddDKGFinalize adds a DKG finalize message.
func (d *DexconGovernance) AddDKGFinalize(final *dkgTypes.Finalize) {
data, err := vm.PackAddDKGFinalize(final)
if err != nil {
log.Error("failed to pack addDKGFinalize input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send addDKGFinalize tx", "err", err)
}
}
// ReportForkVote reports a node for forking votes.
func (d *DexconGovernance) ReportForkVote(vote1, vote2 *coreTypes.Vote) {
data, err := vm.PackReportForkVote(vote1, vote2)
if err != nil {
log.Error("failed to pack report fork vote input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send report fork vote tx", "err", err)
}
}
// ReportForkBlock reports a node for forking blocks.
func (d *DexconGovernance) ReportForkBlock(block1, block2 *coreTypes.Block) {
data, err := vm.PackReportForkBlock(block1, block2)
if err != nil {
log.Error("failed to pack report fork block input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send report fork block tx", "err", err)
}
}
func (d *DexconGovernance) ResetDKG(newSignedCRS []byte) {
data, err := vm.PackResetDKG(newSignedCRS)
if err != nil {
log.Error("failed to pack resetDKG input", "err", err)
return
}
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send resetDKG tx", "err", err)
}
}
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