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soloconsensus.go
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soloconsensus.go
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package solo
import (
"bytes"
"errors"
"fmt"
"math/big"
"github.com/drep-project/DREP-Chain/blockmgr"
"github.com/drep-project/DREP-Chain/chain"
"github.com/drep-project/DREP-Chain/chain/block"
"github.com/drep-project/DREP-Chain/chain/store"
"github.com/drep-project/DREP-Chain/chain/utils"
"github.com/drep-project/DREP-Chain/crypto"
"github.com/drep-project/DREP-Chain/crypto/secp256k1"
"github.com/drep-project/DREP-Chain/crypto/sha3"
"github.com/drep-project/DREP-Chain/database"
"github.com/drep-project/DREP-Chain/params"
consensusTypes "github.com/drep-project/DREP-Chain/pkgs/consensus/types"
"github.com/drep-project/DREP-Chain/types"
)
type SoloConsensus struct {
CoinBase crypto.CommonAddress
PrivKey *secp256k1.PrivateKey
Pubkey *secp256k1.PublicKey
blockGenerator blockmgr.IBlockBlockGenerator
ChainService chain.ChainServiceInterface
DbService *database.DatabaseService
config *SoloConfig
}
func NewSoloConsensus(
chainService chain.ChainServiceInterface,
blockGenerator blockmgr.IBlockBlockGenerator,
myPk *secp256k1.PublicKey,
dbService *database.DatabaseService,
config *SoloConfig) *SoloConsensus {
return &SoloConsensus{
blockGenerator: blockGenerator,
ChainService: chainService,
DbService: dbService,
Pubkey: myPk,
config: config,
}
}
func (soloConsensus *SoloConsensus) Run(privKey *secp256k1.PrivateKey) (*types.Block, error) {
soloConsensus.CoinBase = crypto.PubkeyToAddress(privKey.PubKey())
soloConsensus.PrivKey = privKey
//Block generation consensus reward validation completed
log.Trace("node leader finishes process consensus")
trieStore, err := store.TrieStoreFromStore(soloConsensus.DbService.LevelDb(), soloConsensus.ChainService.BestChain().Tip().StateRoot)
if err != nil {
return nil, err
}
block, gasFee, err := soloConsensus.blockGenerator.GenerateTemplate(trieStore, soloConsensus.CoinBase, soloConsensus.config.BlockInterval)
if err != nil {
return nil, err
}
sig, err := soloConsensus.PrivKey.Sign(sha3.Keccak256(block.AsSignMessage()))
if err != nil {
log.Error("sign block error")
return nil, errors.New("sign block error")
}
block.Proof = types.Proof{consensusTypes.Solo, sig.Serialize()}
err = AccumulateRewards(soloConsensus.Pubkey, trieStore, gasFee, block.Header.Height)
if err != nil {
return nil, err
}
block.Header.StateRoot = trieStore.GetStateRoot()
//verify
if err := soloConsensus.verify(block); err != nil {
return nil, err
}
return block, nil
}
func (soloConsensus *SoloConsensus) verify(blockType *types.Block) error {
parent, err := soloConsensus.ChainService.GetBlockHeaderByHeight(blockType.Header.Height - 1)
if err != nil {
return err
}
dbstore := &store.ChainStore{soloConsensus.DbService.LevelDb()}
trieStore, err := store.TrieStoreFromStore(soloConsensus.DbService.LevelDb(), parent.StateRoot)
if err != nil {
return err
}
gp := new(utils.GasPool).AddGas(blockType.Header.GasLimit.Uint64())
//process transaction
context := block.NewBlockExecuteContext(trieStore, gp, dbstore, blockType)
validators := soloConsensus.ChainService.BlockValidator()
for _, validator := range validators {
err = validator.ExecuteBlock(context)
if err != nil {
log.WithField("ExecuteBlock", err).Debug("multySigVerify")
return err
}
}
stateRoot := trieStore.GetStateRoot()
if blockType.Header.GasUsed.Cmp(context.GasUsed) == 0 {
if !bytes.Equal(blockType.Header.StateRoot, stateRoot) {
if !trieStore.RecoverTrie(soloConsensus.ChainService.GetCurrentHeader().StateRoot) {
log.Fatal("root not equal and recover trie err")
}
log.Error("rootcmd root !=")
return fmt.Errorf("state root not equal")
}
} else {
log.WithField("gasUsed", context.GasUsed).Debug("multySigVerify")
return ErrGasUsed
}
return nil
}
func (soloConsensus *SoloConsensus) ReceiveMsg(peer *consensusTypes.PeerInfo, t uint64, buf []byte) {
}
// AccumulateRewards credits,The leader gets half of the reward and other ,Other participants get the average of the other half
func AccumulateRewards(pubkey *secp256k1.PublicKey, trieStore store.StoreInterface, totalGasBalance *big.Int, height uint64) error {
soloAddr := crypto.PubkeyToAddress(pubkey)
err := trieStore.AddBalance(&soloAddr, height, totalGasBalance)
if err != nil {
return err
}
reward := big.NewInt(params.Rewards)
reward.Mul(reward, new(big.Int).SetUint64(params.Coin))
err = trieStore.AddBalance(&soloAddr, height, reward)
if err != nil {
return err
}
return nil
}