// 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"
"encoding/hex"
"math/big"
coreCommon "github.com/dexon-foundation/dexon-consensus/common"
dexCore "github.com/dexon-foundation/dexon-consensus/core"
coreCrypto "github.com/dexon-foundation/dexon-consensus/core/crypto"
coreEcdsa "github.com/dexon-foundation/dexon-consensus/core/crypto/ecdsa"
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"
"github.com/dexon-foundation/dexon/rlp"
)
type DexconGovernance struct {
*core.Governance
b *DexAPIBackend
chainConfig *params.ChainConfig
privateKey *ecdsa.PrivateKey
address common.Address
nodeSetCache *dexCore.NodeSetCache
}
// 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),
}
g.nodeSetCache = dexCore.NewNodeSetCache(g)
return g
}
// DexconConfiguration return raw config in state.
func (d *DexconGovernance) DexconConfiguration(round uint64) *params.DexconConfig {
return d.GetConfigHelper(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))
tx := types.NewTransaction(
nonce,
vm.GovernanceContractAddress,
big.NewInt(0),
uint64(10000000),
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)
}
// CRS returns the CRS for a given round.
func (d *DexconGovernance) CRS(round uint64) coreCommon.Hash {
s := d.GetHeadHelper()
return coreCommon.Hash(s.CRS(big.NewInt(int64(round))))
}
func (d *DexconGovernance) LenCRS() uint64 {
s := d.GetHeadHelper()
return s.LenCRS().Uint64()
}
// ProposeCRS send proposals of a new CRS
func (d *DexconGovernance) ProposeCRS(round uint64, signedCRS []byte) {
method := vm.GovernanceContractName2Method["proposeCRS"]
res, err := method.Inputs.Pack(big.NewInt(int64(round)), signedCRS)
if err != nil {
log.Error("failed to pack proposeCRS input", "err", err)
return
}
data := append(method.Id(), res...)
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send proposeCRS tx", "err", err)
}
}
// NodeSet returns the current node set.
func (d *DexconGovernance) NodeSet(round uint64) []coreCrypto.PublicKey {
s := d.GetConfigHelper(round)
var pks []coreCrypto.PublicKey
for _, n := range s.QualifiedNodes() {
pk, err := coreEcdsa.NewPublicKeyFromByteSlice(n.PublicKey)
if err != nil {
panic(err)
}
pks = append(pks, pk)
}
return pks
}
// NotifyRoundHeight register the mapping between round and height.
func (d *DexconGovernance) NotifyRoundHeight(targetRound, consensusHeight uint64) {
method := vm.GovernanceContractName2Method["snapshotRound"]
res, err := method.Inputs.Pack(
big.NewInt(int64(targetRound)), big.NewInt(int64(consensusHeight)))
if err != nil {
log.Error("failed to pack snapshotRound input", "err", err)
return
}
data := append(method.Id(), res...)
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send snapshotRound tx", "err", err)
}
}
// AddDKGComplaint adds a DKGComplaint.
func (d *DexconGovernance) AddDKGComplaint(round uint64, complaint *dkgTypes.Complaint) {
method := vm.GovernanceContractName2Method["addDKGComplaint"]
encoded, err := rlp.EncodeToBytes(complaint)
if err != nil {
log.Error("failed to RLP encode complaint to bytes", "err", err)
return
}
res, err := method.Inputs.Pack(big.NewInt(int64(round)), encoded)
if err != nil {
log.Error("failed to pack addDKGComplaint input", "err", err)
return
}
data := append(method.Id(), res...)
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(round uint64, masterPublicKey *dkgTypes.MasterPublicKey) {
method := vm.GovernanceContractName2Method["addDKGMasterPublicKey"]
encoded, err := rlp.EncodeToBytes(masterPublicKey)
if err != nil {
log.Error("failed to RLP encode mpk to bytes", "err", err)
return
}
res, err := method.Inputs.Pack(big.NewInt(int64(round)), encoded)
if err != nil {
log.Error("failed to pack addDKGMasterPublicKey input", "err", err)
return
}
data := append(method.Id(), res...)
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(round uint64, ready *dkgTypes.MPKReady) {
method := vm.GovernanceContractName2Method["addDKGMPKReady"]
encoded, err := rlp.EncodeToBytes(ready)
if err != nil {
log.Error("failed to RLP encode mpk ready to bytes", "err", err)
return
}
res, err := method.Inputs.Pack(big.NewInt(int64(round)), encoded)
if err != nil {
log.Error("failed to pack addDKGMPKReady input", "err", err)
return
}
data := append(method.Id(), res...)
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(round uint64, final *dkgTypes.Finalize) {
method := vm.GovernanceContractName2Method["addDKGFinalize"]
encoded, err := rlp.EncodeToBytes(final)
if err != nil {
log.Error("failed to RLP encode finalize to bytes", "err", err)
return
}
res, err := method.Inputs.Pack(big.NewInt(int64(round)), encoded)
if err != nil {
log.Error("failed to pack addDKGFinalize input", "err", err)
return
}
data := append(method.Id(), res...)
err = d.sendGovTx(context.Background(), data)
if err != nil {
log.Error("failed to send addDKGFinalize tx", "err", err)
}
}
func (d *DexconGovernance) GetNumChains(round uint64) uint32 {
return d.Configuration(round).NumChains
}
func (d *DexconGovernance) NotarySet(round uint64, chainID uint32) (map[string]struct{}, error) {
notarySet, err := d.nodeSetCache.GetNotarySet(round, chainID)
if err != nil {
return nil, err
}
r := make(map[string]struct{}, len(notarySet))
for id := range notarySet {
if key, exists := d.nodeSetCache.GetPublicKey(id); exists {
r[hex.EncodeToString(key.Bytes())] = struct{}{}
}
}
return r, nil
}
func (d *DexconGovernance) DKGSet(round uint64) (map[string]struct{}, error) {
dkgSet, err := d.nodeSetCache.GetDKGSet(round)
if err != nil {
return nil, err
}
r := make(map[string]struct{}, len(dkgSet))
for id := range dkgSet {
if key, exists := d.nodeSetCache.GetPublicKey(id); exists {
r[hex.EncodeToString(key.Bytes())] = struct{}{}
}
}
return r, nil
}
