256 lines
7.3 KiB
Go
256 lines
7.3 KiB
Go
// This implements the interface to the "go-ethereum-ish" library used by Celo.
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package celo
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import (
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"context"
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celoBind "github.com/celo-org/celo-blockchain/accounts/abi/bind"
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celoCommon "github.com/celo-org/celo-blockchain/common"
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celoTypes "github.com/celo-org/celo-blockchain/core/types"
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celoClient "github.com/celo-org/celo-blockchain/ethclient"
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ethereum "github.com/ethereum/go-ethereum"
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ethCommon "github.com/ethereum/go-ethereum/common"
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ethTypes "github.com/ethereum/go-ethereum/core/types"
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ethEvent "github.com/ethereum/go-ethereum/event"
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celoAbi "github.com/certusone/wormhole/node/pkg/celo/abi"
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common "github.com/certusone/wormhole/node/pkg/common"
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ethAbi "github.com/certusone/wormhole/node/pkg/ethereum/abi"
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"go.uber.org/zap"
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)
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type CeloImpl struct {
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NetworkName string
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logger *zap.Logger
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client *celoClient.Client
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filterer *celoAbi.AbiFilterer
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caller *celoAbi.AbiCaller
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}
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func (e *CeloImpl) SetLogger(l *zap.Logger) {
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e.logger = l
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e.logger.Info("using celo specific ethereum library", zap.String("eth_network", e.NetworkName))
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}
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func (e *CeloImpl) DialContext(ctx context.Context, rawurl string) (err error) {
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e.client, err = celoClient.DialContext(ctx, rawurl)
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return
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}
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func (e *CeloImpl) NewAbiFilterer(address ethCommon.Address) (err error) {
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e.filterer, err = celoAbi.NewAbiFilterer(celoCommon.BytesToAddress(address.Bytes()), e.client)
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return
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}
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func (e *CeloImpl) NewAbiCaller(address ethCommon.Address) (err error) {
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e.caller, err = celoAbi.NewAbiCaller(celoCommon.BytesToAddress(address.Bytes()), e.client)
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return
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}
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func (e *CeloImpl) GetCurrentGuardianSetIndex(ctx context.Context) (uint32, error) {
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if e.caller == nil {
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panic("caller is not initialized!")
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}
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opts := &celoBind.CallOpts{Context: ctx}
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return e.caller.GetCurrentGuardianSetIndex(opts)
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}
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func (e *CeloImpl) GetGuardianSet(ctx context.Context, index uint32) (ethAbi.StructsGuardianSet, error) {
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if e.caller == nil {
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panic("caller is not initialized!")
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}
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opts := &celoBind.CallOpts{Context: ctx}
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celoGs, err := e.caller.GetGuardianSet(opts, index)
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if err != nil {
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return ethAbi.StructsGuardianSet{}, err
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}
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ethKeys := make([]ethCommon.Address, len(celoGs.Keys))
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for n, k := range celoGs.Keys {
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ethKeys[n] = ethCommon.BytesToAddress(k.Bytes())
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}
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return ethAbi.StructsGuardianSet{
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Keys: ethKeys,
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ExpirationTime: celoGs.ExpirationTime,
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}, err
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}
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func (e *CeloImpl) WatchLogMessagePublished(ctx, timeout context.Context, sink chan<- *ethAbi.AbiLogMessagePublished) (ethEvent.Subscription, error) {
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if e.filterer == nil {
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panic("filterer is not initialized!")
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}
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messageC := make(chan *celoAbi.AbiLogMessagePublished, 2)
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messageSub, err := e.filterer.WatchLogMessagePublished(&celoBind.WatchOpts{Context: timeout}, messageC, nil)
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if err != nil {
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return messageSub, err
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}
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// The purpose of this is to map events from the Celo log message channel to the Eth log message channel.
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go func() {
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for {
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select {
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case <-ctx.Done():
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return
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case celoEvent := <-messageC:
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sink <- convertEventToEth(celoEvent)
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}
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}
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}()
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return messageSub, err
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}
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func (e *CeloImpl) TransactionReceipt(ctx context.Context, txHash ethCommon.Hash) (*ethTypes.Receipt, error) {
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if e.client == nil {
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panic("client is not initialized!")
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}
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celoReceipt, err := e.client.TransactionReceipt(ctx, celoCommon.BytesToHash(txHash.Bytes()))
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if err != nil {
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return nil, err
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}
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return convertReceiptToEth(celoReceipt), err
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}
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func (e *CeloImpl) TimeOfBlockByHash(ctx context.Context, hash ethCommon.Hash) (uint64, error) {
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if e.client == nil {
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panic("client is not initialized!")
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}
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block, err := e.client.BlockByHash(ctx, celoCommon.BytesToHash(hash.Bytes()))
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if err != nil {
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return 0, err
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}
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return block.Time(), err
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}
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func (e *CeloImpl) ParseLogMessagePublished(ethLog ethTypes.Log) (*ethAbi.AbiLogMessagePublished, error) {
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if e.filterer == nil {
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panic("filterer is not initialized!")
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}
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celoEvent, err := e.filterer.ParseLogMessagePublished(*convertLogFromEth(ðLog))
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if err != nil {
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return nil, err
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}
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return convertEventToEth(celoEvent), err
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}
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func (e *CeloImpl) SubscribeForBlocks(ctx context.Context, sink chan<- *common.NewBlock) (ethereum.Subscription, error) {
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if e.client == nil {
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panic("client is not initialized!")
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}
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headSink := make(chan *celoTypes.Header, 2)
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headerSubscription, err := e.client.SubscribeNewHead(ctx, headSink)
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if err != nil {
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return headerSubscription, err
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}
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// The purpose of this is to map events from the Celo event channel to the new block event channel.
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go func() {
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for {
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select {
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case <-ctx.Done():
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return
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case ev := <-headSink:
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if ev == nil {
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e.logger.Error("new header event is nil", zap.String("eth_network", e.NetworkName))
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continue
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}
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if ev.Number == nil {
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e.logger.Error("new header block number is nil", zap.String("eth_network", e.NetworkName))
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continue
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}
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sink <- &common.NewBlock{
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Number: ev.Number,
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Hash: ethCommon.BytesToHash(ev.Hash().Bytes()),
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}
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}
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}
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}()
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return headerSubscription, err
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}
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func convertEventToEth(ev *celoAbi.AbiLogMessagePublished) *ethAbi.AbiLogMessagePublished {
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return ðAbi.AbiLogMessagePublished{
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Sender: ethCommon.BytesToAddress(ev.Sender.Bytes()),
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Sequence: ev.Sequence,
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Nonce: ev.Nonce,
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Payload: ev.Payload,
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ConsistencyLevel: ev.ConsistencyLevel,
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Raw: *convertLogToEth(&ev.Raw),
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}
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}
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func convertLogToEth(l *celoTypes.Log) *ethTypes.Log {
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topics := make([]ethCommon.Hash, len(l.Topics))
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for n, t := range l.Topics {
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topics[n] = ethCommon.BytesToHash(t.Bytes())
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}
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return ðTypes.Log{
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Address: ethCommon.BytesToAddress(l.Address.Bytes()),
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Topics: topics,
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Data: l.Data,
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BlockNumber: l.BlockNumber,
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TxHash: ethCommon.BytesToHash(l.TxHash.Bytes()),
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TxIndex: l.TxIndex,
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BlockHash: ethCommon.BytesToHash(l.BlockHash.Bytes()),
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Index: l.Index,
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Removed: l.Removed,
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}
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}
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func convertReceiptToEth(celoReceipt *celoTypes.Receipt) *ethTypes.Receipt {
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ethLogs := make([]*ethTypes.Log, len(celoReceipt.Logs))
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for n, l := range celoReceipt.Logs {
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ethLogs[n] = convertLogToEth(l)
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}
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return ðTypes.Receipt{
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Type: celoReceipt.Type,
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PostState: celoReceipt.PostState,
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Status: celoReceipt.Status,
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CumulativeGasUsed: celoReceipt.CumulativeGasUsed,
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Bloom: ethTypes.BytesToBloom(celoReceipt.Bloom.Bytes()),
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Logs: ethLogs,
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TxHash: ethCommon.BytesToHash(celoReceipt.TxHash.Bytes()),
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ContractAddress: ethCommon.BytesToAddress(celoReceipt.ContractAddress.Bytes()),
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GasUsed: celoReceipt.GasUsed,
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BlockHash: ethCommon.BytesToHash(celoReceipt.BlockHash.Bytes()),
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BlockNumber: celoReceipt.BlockNumber,
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TransactionIndex: celoReceipt.TransactionIndex,
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}
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}
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func convertLogFromEth(l *ethTypes.Log) *celoTypes.Log {
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topics := make([]celoCommon.Hash, len(l.Topics))
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for n, t := range l.Topics {
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topics[n] = celoCommon.BytesToHash(t.Bytes())
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}
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return &celoTypes.Log{
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Address: celoCommon.BytesToAddress(l.Address.Bytes()),
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Topics: topics,
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Data: l.Data,
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BlockNumber: l.BlockNumber,
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TxHash: celoCommon.BytesToHash(l.TxHash.Bytes()),
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TxIndex: l.TxIndex,
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BlockHash: celoCommon.BytesToHash(l.BlockHash.Bytes()),
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Index: l.Index,
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Removed: l.Removed,
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}
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}
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