Refactor to generalize polling

Change-Id: Ie30056486ec86f6dceffed231ac227fa9c3499a7
This commit is contained in:
Bruce Riley 2022-05-26 06:53:47 +00:00 committed by Evan Gray
parent bc7834448e
commit cf4722a546
5 changed files with 237 additions and 78 deletions

View File

@ -70,8 +70,9 @@ var (
bscRPC *string
bscContract *string
polygonRPC *string
polygonContract *string
polygonRPC *string
polygonContract *string
polygonCheckpoint *string
ethRopstenRPC *string
ethRopstenContract *string
@ -169,6 +170,7 @@ func init() {
polygonRPC = NodeCmd.Flags().String("polygonRPC", "", "Polygon RPC URL")
polygonContract = NodeCmd.Flags().String("polygonContract", "", "Polygon contract address")
polygonCheckpoint = NodeCmd.Flags().String("polygonCheckpoint", "", "Polygon checkpoint query URL")
ethRopstenRPC = NodeCmd.Flags().String("ethRopstenRPC", "", "Ethereum Ropsten RPC URL")
ethRopstenContract = NodeCmd.Flags().String("ethRopstenContract", "", "Ethereum Ropsten contract address")
@ -790,69 +792,76 @@ func runNode(cmd *cobra.Command, args []string) {
}
if err := supervisor.Run(ctx, "ethwatch",
ethereum.NewEthWatcher(*ethRPC, ethContractAddr, "eth", common.ReadinessEthSyncing, vaa.ChainIDEthereum, lockC, setC, 1, chainObsvReqC[vaa.ChainIDEthereum], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*ethRPC, ethContractAddr, "eth", common.ReadinessEthSyncing, vaa.ChainIDEthereum, lockC, setC, 1, chainObsvReqC[vaa.ChainIDEthereum], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "bscwatch",
ethereum.NewEthWatcher(*bscRPC, bscContractAddr, "bsc", common.ReadinessBSCSyncing, vaa.ChainIDBSC, lockC, nil, 1, chainObsvReqC[vaa.ChainIDBSC], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*bscRPC, bscContractAddr, "bsc", common.ReadinessBSCSyncing, vaa.ChainIDBSC, lockC, nil, 1, chainObsvReqC[vaa.ChainIDBSC], *unsafeDevMode, nil).Run); err != nil {
return err
}
polygonMinConfirmations := uint64(512)
if *testnetMode {
polygonMinConfirmations = 64
{
var extraParams []string
var minConfirmations uint64 = 512
if *polygonCheckpoint != "" {
extraParams = []string{*polygonCheckpoint}
minConfirmations = 1
} else if *testnetMode {
minConfirmations = 64
}
if err := supervisor.Run(ctx, "polygonwatch",
ethereum.NewEthWatcher(*polygonRPC, polygonContractAddr, "polygon", common.ReadinessPolygonSyncing, vaa.ChainIDPolygon, lockC, nil, minConfirmations, chainObsvReqC[vaa.ChainIDPolygon],
*unsafeDevMode, extraParams).Run); err != nil {
// Special case: Polygon can fork like PoW Ethereum, and it's not clear what the safe number of blocks is
//
// If we are not querying the checkpoint server, we should hardcode the minimum number of confirmations to 512 regardless of what the smart contract specifies to protect
// developers from accidentally specifying an unsafe number of confirmations. We can remove this restriction as soon
// as specific public guidance exists for Polygon developers.
return err
}
}
if err := supervisor.Run(ctx, "polygonwatch",
ethereum.NewEthWatcher(*polygonRPC, polygonContractAddr, "polygon", common.ReadinessPolygonSyncing, vaa.ChainIDPolygon, lockC, nil, polygonMinConfirmations, chainObsvReqC[vaa.ChainIDPolygon], *unsafeDevMode).Run); err != nil {
// Special case: Polygon can fork like PoW Ethereum, and it's not clear what the safe number of blocks is
//
// Hardcode the minimum number of confirmations to 512 regardless of what the smart contract specifies to protect
// developers from accidentally specifying an unsafe number of confirmations. We can remove this restriction as soon
// as specific public guidance exists for Polygon developers.
return err
}
if err := supervisor.Run(ctx, "avalanchewatch",
ethereum.NewEthWatcher(*avalancheRPC, avalancheContractAddr, "avalanche", common.ReadinessAvalancheSyncing, vaa.ChainIDAvalanche, lockC, nil, 1, chainObsvReqC[vaa.ChainIDAvalanche], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*avalancheRPC, avalancheContractAddr, "avalanche", common.ReadinessAvalancheSyncing, vaa.ChainIDAvalanche, lockC, nil, 1, chainObsvReqC[vaa.ChainIDAvalanche], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "oasiswatch",
ethereum.NewEthWatcher(*oasisRPC, oasisContractAddr, "oasis", common.ReadinessOasisSyncing, vaa.ChainIDOasis, lockC, nil, 1, chainObsvReqC[vaa.ChainIDOasis], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*oasisRPC, oasisContractAddr, "oasis", common.ReadinessOasisSyncing, vaa.ChainIDOasis, lockC, nil, 1, chainObsvReqC[vaa.ChainIDOasis], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "aurorawatch",
ethereum.NewEthWatcher(*auroraRPC, auroraContractAddr, "aurora", common.ReadinessAuroraSyncing, vaa.ChainIDAurora, lockC, nil, 1, chainObsvReqC[vaa.ChainIDAurora], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*auroraRPC, auroraContractAddr, "aurora", common.ReadinessAuroraSyncing, vaa.ChainIDAurora, lockC, nil, 1, chainObsvReqC[vaa.ChainIDAurora], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "fantomwatch",
ethereum.NewEthWatcher(*fantomRPC, fantomContractAddr, "fantom", common.ReadinessFantomSyncing, vaa.ChainIDFantom, lockC, nil, 1, chainObsvReqC[vaa.ChainIDFantom], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*fantomRPC, fantomContractAddr, "fantom", common.ReadinessFantomSyncing, vaa.ChainIDFantom, lockC, nil, 1, chainObsvReqC[vaa.ChainIDFantom], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "karurawatch",
ethereum.NewEthWatcher(*karuraRPC, karuraContractAddr, "karura", common.ReadinessKaruraSyncing, vaa.ChainIDKarura, lockC, nil, 1, chainObsvReqC[vaa.ChainIDKarura], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*karuraRPC, karuraContractAddr, "karura", common.ReadinessKaruraSyncing, vaa.ChainIDKarura, lockC, nil, 1, chainObsvReqC[vaa.ChainIDKarura], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "acalawatch",
ethereum.NewEthWatcher(*acalaRPC, acalaContractAddr, "acala", common.ReadinessAcalaSyncing, vaa.ChainIDAcala, lockC, nil, 1, chainObsvReqC[vaa.ChainIDAcala], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*acalaRPC, acalaContractAddr, "acala", common.ReadinessAcalaSyncing, vaa.ChainIDAcala, lockC, nil, 1, chainObsvReqC[vaa.ChainIDAcala], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "klaytnwatch",
ethereum.NewEthWatcher(*klaytnRPC, klaytnContractAddr, "klaytn", common.ReadinessKlaytnSyncing, vaa.ChainIDKlaytn, lockC, nil, 1, chainObsvReqC[vaa.ChainIDKlaytn], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*klaytnRPC, klaytnContractAddr, "klaytn", common.ReadinessKlaytnSyncing, vaa.ChainIDKlaytn, lockC, nil, 1, chainObsvReqC[vaa.ChainIDKlaytn], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "celowatch",
ethereum.NewEthWatcher(*celoRPC, celoContractAddr, "celo", common.ReadinessCeloSyncing, vaa.ChainIDCelo, lockC, nil, 1, chainObsvReqC[vaa.ChainIDCelo], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*celoRPC, celoContractAddr, "celo", common.ReadinessCeloSyncing, vaa.ChainIDCelo, lockC, nil, 1, chainObsvReqC[vaa.ChainIDCelo], *unsafeDevMode, nil).Run); err != nil {
return err
}
if *testnetMode {
if err := supervisor.Run(ctx, "ethropstenwatch",
ethereum.NewEthWatcher(*ethRopstenRPC, ethRopstenContractAddr, "ethropsten", common.ReadinessEthRopstenSyncing, vaa.ChainIDEthereumRopsten, lockC, nil, 1, chainObsvReqC[vaa.ChainIDEthereumRopsten], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*ethRopstenRPC, ethRopstenContractAddr, "ethropsten", common.ReadinessEthRopstenSyncing, vaa.ChainIDEthereumRopsten, lockC, nil, 1, chainObsvReqC[vaa.ChainIDEthereumRopsten], *unsafeDevMode, nil).Run); err != nil {
return err
}
if err := supervisor.Run(ctx, "moonbeamwatch",
ethereum.NewEthWatcher(*moonbeamRPC, moonbeamContractAddr, "moonbeam", common.ReadinessMoonbeamSyncing, vaa.ChainIDMoonbeam, lockC, nil, 1, chainObsvReqC[vaa.ChainIDMoonbeam], *unsafeDevMode).Run); err != nil {
ethereum.NewEthWatcher(*moonbeamRPC, moonbeamContractAddr, "moonbeam", common.ReadinessMoonbeamSyncing, vaa.ChainIDMoonbeam, lockC, nil, 1, chainObsvReqC[vaa.ChainIDMoonbeam], *unsafeDevMode, nil).Run); err != nil {
return err
}
}

View File

@ -0,0 +1,45 @@
// This implements the finality check for Moonbeam.
//
// Moonbeam can publish blocks before they are marked final. This means we need to sit on the block until a special "is finalized"
// query returns true. The assumption is that every block number will eventually be published and finalized, it's just that the contents
// of the block (and therefore the hash) might change if there is a rollback.
package ethereum
import (
"context"
common "github.com/certusone/wormhole/node/pkg/common"
ethRpc "github.com/ethereum/go-ethereum/rpc"
"go.uber.org/zap"
"time"
)
type MoonbeamFinalizer struct {
logger *zap.Logger
networkName string
client *ethRpc.Client
}
func (f *MoonbeamFinalizer) SetLogger(l *zap.Logger, netName string) {
f.logger = l
f.networkName = netName
f.logger.Info("using Moonbeam specific finality check", zap.String("eth_network", f.networkName))
}
func (f *MoonbeamFinalizer) DialContext(ctx context.Context, rawurl string) (err error) {
timeout, cancel := context.WithTimeout(ctx, 15*time.Second)
defer cancel()
f.client, err = ethRpc.DialContext(timeout, rawurl)
return err
}
func (f *MoonbeamFinalizer) IsBlockFinalized(ctx context.Context, block *common.NewBlock) (bool, error) {
var finalized bool
err := f.client.CallContext(ctx, &finalized, "moon_isBlockFinalized", block.Hash.Hex())
if err != nil {
f.logger.Error("failed to check for finality", zap.String("eth_network", f.networkName), zap.Error(err))
return false, err
}
return finalized, nil
}

View File

@ -1,4 +1,6 @@
// This implements the interface to the standard go-ethereum library.
// This implements polling for the next available block.
// It can optionally call a chain specific function to verify that the block is finalized.
package ethereum
@ -23,18 +25,29 @@ import (
"go.uber.org/zap"
)
type MoonbeamImpl struct {
BaseEth *EthImpl
logger *zap.Logger
type PollFinalizer interface {
SetLogger(l *zap.Logger, netName string)
DialContext(ctx context.Context, rawurl string) error
IsBlockFinalized(ctx context.Context, block *common.NewBlock) (bool, error)
}
type PollImpl struct {
BaseEth EthImpl
Finalizer PollFinalizer
DelayInMs int
logger *zap.Logger
rawClient *ethRpc.Client
}
func (e *MoonbeamImpl) SetLogger(l *zap.Logger) {
func (e *PollImpl) SetLogger(l *zap.Logger) {
e.logger = l
e.logger.Info("using Moonbeam specific implementation", zap.String("eth_network", e.BaseEth.NetworkName))
e.logger.Info("using polling to check for new blocks", zap.String("eth_network", e.BaseEth.NetworkName), zap.Int("delay_in_ms", e.DelayInMs))
if e.Finalizer != nil {
e.Finalizer.SetLogger(l, e.BaseEth.NetworkName)
}
}
func (e *MoonbeamImpl) DialContext(ctx context.Context, rawurl string) (err error) {
func (e *PollImpl) DialContext(ctx context.Context, rawurl string) (err error) {
timeout, cancel := context.WithTimeout(ctx, 15*time.Second)
defer cancel()
@ -44,59 +57,66 @@ func (e *MoonbeamImpl) DialContext(ctx context.Context, rawurl string) (err erro
return err
}
if e.Finalizer != nil {
err = e.Finalizer.DialContext(ctx, rawurl)
if err != nil {
return err
}
}
// This is used for doing all other go-ethereum calls.
return e.BaseEth.DialContext(ctx, rawurl)
}
func (e *MoonbeamImpl) NewAbiFilterer(address ethCommon.Address) (err error) {
func (e *PollImpl) NewAbiFilterer(address ethCommon.Address) (err error) {
return e.BaseEth.NewAbiFilterer(address)
}
func (e *MoonbeamImpl) NewAbiCaller(address ethCommon.Address) (err error) {
func (e *PollImpl) NewAbiCaller(address ethCommon.Address) (err error) {
return e.BaseEth.NewAbiCaller(address)
}
func (e *MoonbeamImpl) GetCurrentGuardianSetIndex(ctx context.Context) (uint32, error) {
func (e *PollImpl) GetCurrentGuardianSetIndex(ctx context.Context) (uint32, error) {
return e.BaseEth.GetCurrentGuardianSetIndex(ctx)
}
func (e *MoonbeamImpl) GetGuardianSet(ctx context.Context, index uint32) (ethAbi.StructsGuardianSet, error) {
func (e *PollImpl) GetGuardianSet(ctx context.Context, index uint32) (ethAbi.StructsGuardianSet, error) {
return e.BaseEth.GetGuardianSet(ctx, index)
}
func (e *MoonbeamImpl) WatchLogMessagePublished(ctx, timeout context.Context, sink chan<- *ethAbi.AbiLogMessagePublished) (ethEvent.Subscription, error) {
func (e *PollImpl) WatchLogMessagePublished(ctx, timeout context.Context, sink chan<- *ethAbi.AbiLogMessagePublished) (ethEvent.Subscription, error) {
return e.BaseEth.WatchLogMessagePublished(ctx, timeout, sink)
}
func (e *MoonbeamImpl) TransactionReceipt(ctx context.Context, txHash ethCommon.Hash) (*ethTypes.Receipt, error) {
func (e *PollImpl) TransactionReceipt(ctx context.Context, txHash ethCommon.Hash) (*ethTypes.Receipt, error) {
return e.BaseEth.TransactionReceipt(ctx, txHash)
}
func (e *MoonbeamImpl) TimeOfBlockByHash(ctx context.Context, hash ethCommon.Hash) (uint64, error) {
func (e *PollImpl) TimeOfBlockByHash(ctx context.Context, hash ethCommon.Hash) (uint64, error) {
return e.BaseEth.TimeOfBlockByHash(ctx, hash)
}
func (e *MoonbeamImpl) ParseLogMessagePublished(log ethTypes.Log) (*ethAbi.AbiLogMessagePublished, error) {
func (e *PollImpl) ParseLogMessagePublished(log ethTypes.Log) (*ethAbi.AbiLogMessagePublished, error) {
return e.BaseEth.ParseLogMessagePublished(log)
}
type MoonbeamSubscription struct {
type PollSubscription struct {
errOnce sync.Once
err chan error
quit chan error
unsubDone chan struct{}
}
func (sub *MoonbeamSubscription) Err() <-chan error {
var ErrUnsubscribed = errors.New("unsubscribed")
func (sub *PollSubscription) Err() <-chan error {
return sub.err
}
var errUnsubscribed = errors.New("unsubscribed")
func (sub *MoonbeamSubscription) Unsubscribe() {
func (sub *PollSubscription) Unsubscribe() {
sub.errOnce.Do(func() {
select {
case sub.quit <- errUnsubscribed:
case sub.quit <- ErrUnsubscribed:
<-sub.unsubDone
case <-sub.unsubDone:
}
@ -104,12 +124,7 @@ func (sub *MoonbeamSubscription) Unsubscribe() {
})
}
// Moonbeam can publish blocks before they are marked final. This means we need to sit on the block until a special "is finalized"
// query returns true. The assumption is that every block number will eventually be published and finalized, it's just that the contents
// of the block (and therefore the hash) might change if there is a rollback. Therefore rather than subscribing for headers from geth,
// we use a polling mechanism to get the next expected block, and keep doing it until it is marked final.
func (e *MoonbeamImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *common.NewBlock) (ethereum.Subscription, error) {
func (e *PollImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *common.NewBlock) (ethereum.Subscription, error) {
if e.BaseEth.client == nil {
panic("client is not initialized!")
}
@ -117,7 +132,7 @@ func (e *MoonbeamImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *comm
panic("rawClient is not initialized!")
}
sub := &MoonbeamSubscription{
sub := &PollSubscription{
err: make(chan error, 1),
}
@ -127,7 +142,6 @@ func (e *MoonbeamImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *comm
}
currentBlockNumber := *latestBlock.Number
const DELAY_IN_MS = 250
var BIG_ONE = big.NewInt(1)
timer := time.NewTimer(time.Millisecond) // Start immediately.
@ -175,12 +189,18 @@ func (e *MoonbeamImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *comm
}
}
finalized, err := e.isBlockFinalized(ctx, block.Hash.Hex())
if err != nil {
errorOccurred = true
e.logger.Error("failed to see if block is finalized", zap.String("eth_network", e.BaseEth.NetworkName),
zap.Uint64("block", currentBlockNumber.Uint64()), zap.Error(err))
break
var finalized bool
if e.Finalizer != nil {
var err error
finalized, err = e.Finalizer.IsBlockFinalized(ctx, block)
if err != nil {
errorOccurred = true
e.logger.Error("failed to see if block is finalized", zap.String("eth_network", e.BaseEth.NetworkName),
zap.Uint64("block", currentBlockNumber.Uint64()), zap.Error(err))
break
}
} else {
finalized = true
}
if !finalized {
break
@ -199,7 +219,7 @@ func (e *MoonbeamImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *comm
errorCount = 0
}
timer = time.NewTimer(DELAY_IN_MS * time.Millisecond)
timer = time.NewTimer(time.Duration(e.DelayInMs) * time.Millisecond)
}
}
}()
@ -207,7 +227,7 @@ func (e *MoonbeamImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *comm
return sub, err
}
func (e *MoonbeamImpl) getBlock(ctx context.Context, number *big.Int) (*common.NewBlock, error) {
func (e *PollImpl) getBlock(ctx context.Context, number *big.Int) (*common.NewBlock, error) {
var numStr string
if number != nil {
numStr = ethHexUtils.EncodeBig(number)
@ -217,7 +237,7 @@ func (e *MoonbeamImpl) getBlock(ctx context.Context, number *big.Int) (*common.N
type Marshaller struct {
Number *ethHexUtils.Big
Hash ethCommon.Hash `json:"hash"`
Hash ethCommon.Hash `json:"hash"`
}
var m Marshaller
@ -234,14 +254,3 @@ func (e *MoonbeamImpl) getBlock(ctx context.Context, number *big.Int) (*common.N
Hash: m.Hash,
}, nil
}
func (e *MoonbeamImpl) isBlockFinalized(ctx context.Context, hash string) (bool, error) {
var finalized bool
err := e.rawClient.CallContext(ctx, &finalized, "moon_isBlockFinalized", hash)
if err != nil {
e.logger.Error("failed to check for finality", zap.String("eth_network", e.BaseEth.NetworkName), zap.Error(err))
return false, err
}
return finalized, nil
}

View File

@ -0,0 +1,93 @@
// This implements the finality check for Polygon.
//
// It can take up to 512 blocks for polygon blocks to be finalized. Rather than wait that long, we will query the checkpoint to see if they are finalized sooner.
//
// TestNet query URL: "https://apis.matic.network/api/v1/mumbai/block-included/"
// MainNet query URL: "https://apis.matic.network/api/v1/matic/block-included/block-number/"
package ethereum
import (
"context"
"encoding/json"
common "github.com/certusone/wormhole/node/pkg/common"
"go.uber.org/zap"
"io/ioutil"
"math/big"
"net/http"
)
type PolygonFinalizer struct {
Url string
logger *zap.Logger
networkName string
highestCheckpoint big.Int
}
func UsePolygonFinalizer(extraParams []string) bool {
return len(extraParams) != 0 && extraParams[0] != ""
}
func (f *PolygonFinalizer) SetLogger(l *zap.Logger, netName string) {
f.logger = l
f.networkName = netName
f.logger.Info("using Polygon specific finality check", zap.String("eth_network", f.networkName), zap.String("query_url", f.Url))
}
func (f *PolygonFinalizer) DialContext(ctx context.Context, _rawurl string) (err error) {
return nil
}
func (f *PolygonFinalizer) IsBlockFinalized(ctx context.Context, block *common.NewBlock) (bool, error) {
if block.Number.Cmp(&f.highestCheckpoint) <= 0 {
return true, nil
}
url := f.Url + block.Number.String()
response, err := http.Get(url)
if err != nil {
return false, err
}
responseData, err := ioutil.ReadAll(response.Body)
if err != nil {
return false, err
}
var result map[string]string
json.Unmarshal([]byte(responseData), &result)
status := result["message"]
if status == "" || status == "No block found" {
f.logger.Info("DEBUG: not finalized", zap.String("eth_network", f.networkName), zap.String("requested_block", block.Number.String()))
return false, nil
}
if status != "success" {
f.logger.Error("unexpected checkpoint status", zap.String("eth_network", f.networkName),
zap.String("requested_block", block.Number.String()), zap.String("status", status))
return false, nil
}
// If we get this far, we know this block is finalized, so we will return true even in the error cases.
endStr := result["end"]
if endStr == "" {
f.logger.Error("checkpoint reply is missing end", zap.String("eth_network", f.networkName), zap.String("requested_block", block.Number.String()))
return true, nil
}
end, ok := new(big.Int).SetString(endStr, 10)
if !ok {
f.logger.Error("checkpoint reply contains unexpected end", zap.String("eth_network", f.networkName),
zap.String("requested_block", block.Number.String()), zap.String("end_str", endStr))
return true, nil
}
f.highestCheckpoint = *end
f.logger.Info("checkpoint query returned", zap.String("eth_network", f.networkName),
zap.String("requested_block", block.Number.String()), zap.String("reply", string(responseData)))
return (block.Number.Cmp(&f.highestCheckpoint) <= 0), nil
}

View File

@ -126,15 +126,18 @@ func NewEthWatcher(
setEvents chan *common.GuardianSet,
minConfirmations uint64,
obsvReqC chan *gossipv1.ObservationRequest,
unsafeDevMode bool) *Watcher {
unsafeDevMode bool,
extraParams []string) *Watcher {
var ethIntf common.Ethish
if chainID == vaa.ChainIDCelo && !unsafeDevMode {
// When we are running in mainnet or testnet, we need to use the Celo ethereum library rather than go-ethereum.
// However, in devnet, we currently run the standard ETH node for Celo, so we need to use the standard go-ethereum.
ethIntf = &celo.CeloImpl{NetworkName: networkName}
} else if chainID == vaa.ChainIDMoonbeam {
ethIntf = &MoonbeamImpl{BaseEth: &EthImpl{NetworkName: networkName}}
} else if chainID == vaa.ChainIDMoonbeam && !unsafeDevMode {
ethIntf = &PollImpl{BaseEth: EthImpl{NetworkName: networkName}, Finalizer: &MoonbeamFinalizer{}, DelayInMs: 250}
} else if chainID == vaa.ChainIDPolygon && UsePolygonFinalizer(extraParams) {
ethIntf = &PollImpl{BaseEth: EthImpl{NetworkName: networkName}, Finalizer: &PolygonFinalizer{Url: extraParams[0]}, DelayInMs: 5000}
} else {
ethIntf = &EthImpl{NetworkName: networkName}
}