/
events.go
262 lines (214 loc) · 6.27 KB
/
events.go
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package eth
import (
"context"
"math/big"
"strings"
"time"
"github.com/bloxapp/ssv/eth1"
"github.com/bloxapp/ssv/eth1/abiparser"
"github.com/bloxapp/ssv/logging/fields"
"github.com/bloxapp/ssv/utils/format"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/pkg/errors"
"github.com/stakestar/startracker/db"
"go.uber.org/zap"
)
const blocksInBatch uint64 = 10000
var startBlock = big.NewInt(8661727)
type Config struct {
RPCUrl string `yaml:"RPCUrl" env:"ETH_RPC_URL" env-description:"Ethereum RPC URL"`
ContractAddress string `yaml:"ContractAddress" env:"ETH_CONTRACT_ADDRESS" env-description:"Ethereum contract address"`
}
type EthEvents struct {
config *Config
client *ethclient.Client
ctx context.Context
logger *zap.Logger
db *db.BoltDB
}
func NewEthEvents(ctx context.Context, config *Config, db *db.BoltDB, logger *zap.Logger) (*EthEvents, error) {
return &EthEvents{
config: config,
ctx: ctx,
logger: logger,
db: db,
}, nil
}
func (e *EthEvents) Start() error {
if err := e.connect(); err != nil {
return err
}
return nil
}
func (e *EthEvents) connect() error {
client, err := ethclient.Dial(e.config.RPCUrl)
if err != nil {
return err
}
e.client = client
return nil
}
func (e *EthEvents) FetchAddedOperatorEvents() error {
contractAbi, err := abi.JSON(strings.NewReader(eth1.ContractABI(0)))
if err != nil {
e.logger.Error("failed to parse contract abi", zap.Error(err))
return err
}
abiParser := eth1.NewParser(e.logger, 0)
e.logger.Info("fetching operator added events")
currentBlock, err := e.client.BlockNumber(e.ctx)
if err != nil {
return errors.Wrap(err, "failed to get current block")
}
latestBlock, err := e.db.GetLastBlock()
if err != nil {
e.logger.Error("failed to get latest block", zap.Error(err))
}
if latestBlock != nil && latestBlock.Uint64() > startBlock.Uint64() {
startBlock = latestBlock
}
e.logger.Info("fetching events from block", zap.String("from", startBlock.String()))
var toBlock *big.Int
var stop = false
for {
if currentBlock-startBlock.Uint64() > blocksInBatch {
toBlock = big.NewInt(int64(startBlock.Uint64() + blocksInBatch))
} else {
toBlock = big.NewInt(int64(currentBlock))
stop = true
}
err = e.fetchEvents(startBlock, toBlock, contractAbi, abiParser)
if err != nil {
return err
}
startBlock = toBlock
err = e.db.SaveLastBlock(toBlock)
if err != nil {
e.logger.Error("failed to save last block", zap.Error(err))
}
if stop {
e.logger.Info("finished fetching events")
break
}
}
return nil
}
func (e *EthEvents) reconnect(retries int, delay time.Duration) {
for i := 0; i < retries; i++ {
if err := e.connect(); err != nil {
e.logger.Warn("connection failed, retrying...", zap.Int("retry", i+1), zap.Error(err))
time.Sleep(delay)
continue
}
err := e.ListenAddedOperatorEvents()
if err != nil {
e.logger.Error("failed to listen after reconnect", zap.Error(err))
}
return
}
e.logger.Panic("failed to reconnect to eth node")
}
func (e *EthEvents) ListenAddedOperatorEvents() error {
contractAbi, err := abi.JSON(strings.NewReader(eth1.ContractABI(0)))
if err != nil {
e.logger.Error("failed to parse contract abi", zap.Error(err))
return err
}
abiParser := eth1.NewParser(e.logger, 0)
e.logger.Info("listening to operator added events")
contractAddress := common.HexToAddress(e.config.ContractAddress)
eventSignature := []byte("OperatorAdded(uint64,address,bytes,uint256)")
hash := crypto.Keccak256Hash(eventSignature)
query := ethereum.FilterQuery{
Addresses: []common.Address{
contractAddress,
},
Topics: [][]common.Hash{{
hash,
}},
}
logs := make(chan types.Log)
sub, err := e.client.SubscribeFilterLogs(e.ctx, query, logs)
if err != nil {
return errors.Wrap(err, "Failed to subscribe to logs")
}
go func() {
if err := e.listenToSubscription(sub, logs, contractAbi, abiParser); err != nil {
e.reconnect(5, 10*time.Second)
}
}()
return nil
}
func (e *EthEvents) listenToSubscription(sub ethereum.Subscription, logs chan types.Log, contractAbi abi.ABI, abiParser eth1.AbiParser) error {
for {
select {
case err := <-sub.Err():
e.logger.Warn("failed to read logs from subscription", zap.Error(err))
return err
case vLog := <-logs:
err := e.handeNewEvent(vLog, contractAbi, abiParser)
if err != nil {
e.logger.Error("failed to handle new event", zap.Error(err))
}
}
}
}
func (e *EthEvents) fetchEvents(fromBlock *big.Int, toBlock *big.Int, contractAbi abi.ABI, abiParser eth1.AbiParser) error {
contractAddress := common.HexToAddress(e.config.ContractAddress)
eventSignature := []byte("OperatorAdded(uint64,address,bytes,uint256)")
hash := crypto.Keccak256Hash(eventSignature)
query := ethereum.FilterQuery{
Addresses: []common.Address{
contractAddress,
},
FromBlock: fromBlock,
ToBlock: toBlock,
Topics: [][]common.Hash{{
hash,
}},
}
logs, err := e.client.FilterLogs(e.ctx, query)
if err != nil {
e.logger.Error("failed to subscribe to logs", zap.Error(err))
return err
}
for _, vLog := range logs {
err = e.handeNewEvent(vLog, contractAbi, abiParser)
if err != nil {
e.logger.Error("failed to handle new event", zap.Error(err))
}
}
return nil
}
func (e *EthEvents) handeNewEvent(log types.Log, contractAbi abi.ABI, abiParser eth1.AbiParser) error {
if log.Removed {
return nil
}
parsed, err := abiParser.ParseOperatorAddedEvent(log, contractAbi)
if err != nil {
e.logger.Warn("could not parse ongoing event, the event is malformed",
fields.BlockNumber(log.BlockNumber),
fields.TxHash(log.TxHash),
zap.Error(err),
)
return nil
}
e.logger.Info("received operator added event", zap.Any("event", parsed))
err = e.saveOperator(parsed)
if err != nil {
e.logger.Warn("could not save operator", zap.Error(err))
}
return nil
}
func (e *EthEvents) saveOperator(event *abiparser.OperatorAddedEvent) error {
return e.db.SaveOperatorAndUpdateNodeData(&db.Operator{
OperatorID: format.OperatorID(event.PublicKey),
PublicKey: string(event.PublicKey),
OperatorIDContract: event.OperatorId,
})
}