plugeth/plugins/wrappers/backendwrapper/backendwrapper.go

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package backendwrapper
import (
"context"
"encoding/json"
"fmt"
"math/big"
"reflect"
"sync"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
gcore "github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/event"
gparams "github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/internal/ethapi"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/trie"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/openrelayxyz/plugeth-utils/core"
"github.com/openrelayxyz/plugeth-utils/restricted"
"github.com/openrelayxyz/plugeth-utils/restricted/params"
)
type Backend struct {
b ethapi.Backend
newTxsFeed event.Feed
newTxsOnce sync.Once
chainFeed event.Feed
chainOnce sync.Once
chainHeadFeed event.Feed
chainHeadOnce sync.Once
chainSideFeed event.Feed
chainSideOnce sync.Once
logsFeed event.Feed
logsOnce sync.Once
pendingLogsFeed event.Feed
pendingLogsOnce sync.Once
removedLogsFeed event.Feed
removedLogsOnce sync.Once
chainConfig *params.ChainConfig
trieConfig *trie.Config
}
func NewBackend(b ethapi.Backend, tc *trie.Config) *Backend {
return &Backend{
b: b,
trieConfig: tc}
}
func (b *Backend) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
return b.b.SuggestGasTipCap(ctx)
}
func (b *Backend) ChainDb() restricted.Database {
return &dbWrapper{b.b.ChainDb()}
}
func (b *Backend) ExtRPCEnabled() bool {
return b.b.ExtRPCEnabled()
}
func (b *Backend) RPCGasCap() uint64 {
return b.b.RPCGasCap()
}
func (b *Backend) RPCTxFeeCap() float64 {
return b.b.RPCTxFeeCap()
}
func (b *Backend) UnprotectedAllowed() bool {
return b.b.UnprotectedAllowed()
}
func (b *Backend) SetHead(number uint64) {
b.b.SetHead(number)
}
func (b *Backend) HeaderByNumber(ctx context.Context, number int64) ([]byte, error) {
header, err := b.b.HeaderByNumber(ctx, rpc.BlockNumber(number))
if err != nil {
return nil, err
}
return rlp.EncodeToBytes(header)
}
func (b *Backend) HeaderByHash(ctx context.Context, hash core.Hash) ([]byte, error) {
header, err := b.b.HeaderByHash(ctx, common.Hash(hash))
if err != nil {
return nil, err
}
return rlp.EncodeToBytes(header)
}
func (b *Backend) CurrentHeader() []byte {
ret, _ := rlp.EncodeToBytes(b.b.CurrentHeader())
return ret
}
func (b *Backend) CurrentBlock() []byte {
ret, _ := rlp.EncodeToBytes(b.b.CurrentBlock())
return ret
}
func (b *Backend) BlockByNumber(ctx context.Context, number int64) ([]byte, error) {
block, err := b.b.BlockByNumber(ctx, rpc.BlockNumber(number))
if err != nil {
return nil, err
}
return rlp.EncodeToBytes(block)
}
func (b *Backend) BlockByHash(ctx context.Context, hash core.Hash) ([]byte, error) {
block, err := b.b.BlockByHash(ctx, common.Hash(hash))
if err != nil {
return nil, err
}
return rlp.EncodeToBytes(block)
}
func (b *Backend) GetReceipts(ctx context.Context, hash core.Hash) ([]byte, error) {
receipts, err := b.b.GetReceipts(ctx, common.Hash(hash))
if err != nil {
return nil, err
}
return json.Marshal(receipts)
}
func (b *Backend) GetTd(ctx context.Context, hash core.Hash) *big.Int {
return b.b.GetTd(ctx, common.Hash(hash))
}
func (b *Backend) SendTx(ctx context.Context, signedTx []byte) error {
tx := new(types.Transaction)
if err := tx.UnmarshalBinary(signedTx); err != nil {
return err
}
return b.b.SendTx(ctx, tx)
}
func (b *Backend) GetTransaction(ctx context.Context, txHash core.Hash) ([]byte, core.Hash, uint64, uint64, error) { // RLP Encoded transaction {
tx, blockHash, blockNumber, index, err := b.b.GetTransaction(ctx, common.Hash(txHash))
if err != nil {
return nil, core.Hash(blockHash), blockNumber, index, err
}
enc, err := tx.MarshalBinary()
return enc, core.Hash(blockHash), blockNumber, index, err
}
func (b *Backend) GetPoolTransactions() ([][]byte, error) {
txs, err := b.b.GetPoolTransactions()
if err != nil {
return nil, err
}
results := make([][]byte, len(txs))
for i, tx := range txs {
results[i], _ = rlp.EncodeToBytes(tx)
}
return results, nil
}
func (b *Backend) GetPoolTransaction(txHash core.Hash) []byte {
tx := b.b.GetPoolTransaction(common.Hash(txHash))
if tx == nil {
return []byte{}
}
enc, _ := rlp.EncodeToBytes(tx)
return enc
}
func (b *Backend) GetPoolNonce(ctx context.Context, addr core.Address) (uint64, error) {
return b.b.GetPoolNonce(ctx, common.Address(addr))
}
func (b *Backend) Stats() (pending int, queued int) {
return b.b.Stats()
}
func (b *Backend) TxPoolContent() (map[core.Address][][]byte, map[core.Address][][]byte) {
pending, queued := b.b.TxPoolContent()
trpending, trqueued := make(map[core.Address][][]byte), make(map[core.Address][][]byte)
for k, v := range pending {
trpending[core.Address(k)] = make([][]byte, len(v))
for i, tx := range v {
trpending[core.Address(k)][i], _ = tx.MarshalBinary()
}
}
for k, v := range queued {
trqueued[core.Address(k)] = make([][]byte, len(v))
for i, tx := range v {
trpending[core.Address(k)][i], _ = tx.MarshalBinary()
}
}
return trpending, trqueued
} // RLP encoded transactions
func (b *Backend) BloomStatus() (uint64, uint64) {
return b.b.BloomStatus()
}
func (b *Backend) GetLogs(ctx context.Context, blockHash core.Hash) ([][]byte, error) {
header, _ := b.b.HeaderByHash(ctx, common.Hash(blockHash))
logs, err := b.b.GetLogs(ctx, common.Hash(blockHash), uint64(header.Number.Uint64()))
if err != nil {
return nil, err
}
encLogs := make([][]byte, len(logs))
for i, log := range logs {
encLogs[i], _ = rlp.EncodeToBytes(log)
}
return encLogs, nil
} // []RLP encoded logs
type dli interface {
SyncProgress() ethereum.SyncProgress
}
type dl struct {
dl dli
}
type progress struct {
p ethereum.SyncProgress
}
func (p *progress) StartingBlock() uint64 {
return p.p.StartingBlock
}
func (p *progress) CurrentBlock() uint64 {
return p.p.CurrentBlock
}
func (p *progress) HighestBlock() uint64 {
return p.p.HighestBlock
}
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func (p *progress) PulledStates() uint64 {
log.Warn("PulledStates is no longer supported by Geth")
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return 0
}
func (p *progress) KnownStates() uint64 {
log.Warn("KnownStates is no longer supported by Geth")
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return 0
}
func (p *progress) SyncedAccounts() uint64 {
return p.p.SyncedAccounts
}
func (p *progress) SyncedAccountBytes() uint64 {
return p.p.SyncedAccountBytes
}
func (p *progress) SyncedBytecodes() uint64 {
return p.p.SyncedBytecodes
}
func (p *progress) SyncedBytecodeBytes() uint64 {
return p.p.SyncedBytecodeBytes
}
func (p *progress) SyncedStorage() uint64 {
return p.p.SyncedStorage
}
func (p *progress) SyncedStorageBytes() uint64 {
return p.p.SyncedStorageBytes
}
func (p *progress) HealedTrienodes() uint64 {
return p.p.HealedTrienodes
}
func (p *progress) HealedTrienodeBytes() uint64 {
return p.p.HealedTrienodeBytes
}
func (p *progress) HealedBytecodes() uint64 {
return p.p.HealedBytecodes
}
func (p *progress) HealedBytecodeBytes() uint64 {
return p.p.HealedBytecodeBytes
}
func (p *progress) HealingTrienodes() uint64 {
return p.p.HealingTrienodes
}
func (p *progress) HealingBytecode() uint64 {
return p.p.HealingBytecode
}
func (d *dl) Progress() core.Progress {
return &progress{d.dl.SyncProgress()}
}
func (b *Backend) Downloader() core.Downloader {
return &dl{b.b}
}
func (b *Backend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) core.Subscription {
var sub event.Subscription
b.newTxsOnce.Do(func() {
bch := make(chan gcore.NewTxsEvent, 100)
sub = b.b.SubscribeNewTxsEvent(bch)
go func() {
for {
select {
case item := <-bch:
txe := core.NewTxsEvent{
Txs: make([][]byte, len(item.Txs)),
}
for i, tx := range item.Txs {
txe.Txs[i], _ = tx.MarshalBinary()
}
b.newTxsFeed.Send(txe)
case err := <-sub.Err():
log.Warn("Subscription error for NewTxs", "err", err)
return
}
}
}()
})
return b.newTxsFeed.Subscribe(ch)
}
func (b *Backend) SubscribeChainEvent(ch chan<- core.ChainEvent) core.Subscription {
var sub event.Subscription
b.chainOnce.Do(func() {
bch := make(chan gcore.ChainEvent, 100)
sub = b.b.SubscribeChainEvent(bch)
go func() {
for {
select {
case item := <-bch:
ce := core.ChainEvent{
Hash: core.Hash(item.Hash),
}
ce.Block, _ = rlp.EncodeToBytes(item.Block)
ce.Logs, _ = rlp.EncodeToBytes(item.Logs)
b.chainFeed.Send(ce)
case err := <-sub.Err():
log.Warn("Subscription error for Chain", "err", err)
return
}
}
}()
})
return b.chainFeed.Subscribe(ch)
}
func (b *Backend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) core.Subscription {
var sub event.Subscription
b.chainHeadOnce.Do(func() {
bch := make(chan gcore.ChainHeadEvent, 100)
sub = b.b.SubscribeChainHeadEvent(bch)
go func() {
for {
select {
case item := <-bch:
che := core.ChainHeadEvent{}
che.Block, _ = rlp.EncodeToBytes(item.Block)
b.chainHeadFeed.Send(che)
case err := <-sub.Err():
log.Warn("Subscription error for ChainHead", "err", err)
return
}
}
}()
})
return b.chainHeadFeed.Subscribe(ch)
}
func (b *Backend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) core.Subscription {
var sub event.Subscription
b.chainSideOnce.Do(func() {
bch := make(chan gcore.ChainSideEvent, 100)
sub = b.b.SubscribeChainSideEvent(bch)
go func() {
for {
select {
case item := <-bch:
cse := core.ChainSideEvent{}
cse.Block, _ = rlp.EncodeToBytes(item.Block)
b.chainSideFeed.Send(cse)
case err := <-sub.Err():
log.Warn("Subscription error for ChainSide", "err", err)
return
}
}
}()
})
return b.chainSideFeed.Subscribe(ch)
}
func (b *Backend) SubscribeLogsEvent(ch chan<- [][]byte) core.Subscription {
var sub event.Subscription
b.logsOnce.Do(func() {
bch := make(chan []*types.Log, 100)
sub = b.b.SubscribeLogsEvent(bch)
go func() {
for {
select {
case item := <-bch:
logs := make([][]byte, len(item))
for i, log := range item {
logs[i], _ = rlp.EncodeToBytes(log)
}
b.logsFeed.Send(logs)
case err := <-sub.Err():
log.Warn("Subscription error for Logs", "err", err)
return
}
}
}()
})
return b.logsFeed.Subscribe(ch)
} // []RLP encoded logs
func (b *Backend) SubscribePendingLogsEvent(ch chan<- [][]byte) core.Subscription {
var sub event.Subscription
b.pendingLogsOnce.Do(func() {
bch := make(chan []*types.Log, 100)
sub = b.b.SubscribePendingLogsEvent(bch)
go func() {
for {
select {
case item := <-bch:
logs := make([][]byte, len(item))
for i, log := range item {
logs[i], _ = rlp.EncodeToBytes(log)
}
b.pendingLogsFeed.Send(logs)
case err := <-sub.Err():
log.Warn("Subscription error for PendingLogs", "err", err)
return
}
}
}()
})
return b.pendingLogsFeed.Subscribe(ch)
} // RLP Encoded logs
func (b *Backend) SubscribeRemovedLogsEvent(ch chan<- []byte) core.Subscription {
var sub event.Subscription
b.removedLogsOnce.Do(func() {
bch := make(chan gcore.RemovedLogsEvent, 100)
sub = b.b.SubscribeRemovedLogsEvent(bch)
go func() {
for {
select {
case item := <-bch:
logs := make([][]byte, len(item.Logs))
for i, log := range item.Logs {
logs[i], _ = rlp.EncodeToBytes(log)
}
b.removedLogsFeed.Send(item)
case err := <-sub.Err():
log.Warn("Subscription error for RemovedLogs", "err", err)
return
}
}
}()
})
return b.removedLogsFeed.Subscribe(ch)
} // RLP encoded logs
func convertAndSet(a, b reflect.Value) (err error) {
defer func() {
if recover() != nil {
fmt.Errorf("error converting: %v", err.Error())
}
}()
a.Set(b.Convert(a.Type()))
return nil
}
func (b *Backend) ChainConfig() *params.ChainConfig {
// We're using the reflect library to copy data from params.ChainConfig to
// pparams.ChainConfig, so this function shouldn't need to be touched for
// simple changes to ChainConfig (though pparams.ChainConfig may need to be
// updated). Note that this probably won't carry over consensus engine data.
if b.chainConfig != nil {
return b.chainConfig
}
b.chainConfig = &params.ChainConfig{}
nval := reflect.ValueOf(b.b.ChainConfig())
ntype := nval.Elem().Type()
lval := reflect.ValueOf(b.chainConfig)
for i := 0; i < nval.Elem().NumField(); i++ {
field := ntype.Field(i)
v := nval.Elem().FieldByName(field.Name)
lv := lval.Elem().FieldByName(field.Name)
log.Info("Checking value for", "field", field.Name)
if lv.Kind() != reflect.Invalid {
// If core.ChainConfig doesn't have this field, skip it.
if v.Type() == lv.Type() && lv.CanSet() {
lv.Set(v)
} else {
convertAndSet(lv, v)
}
}
}
return b.chainConfig
}
func CloneChainConfig(cf *gparams.ChainConfig) *params.ChainConfig {
result := &params.ChainConfig{}
nval := reflect.ValueOf(result)
ntype := nval.Elem().Type()
lval := reflect.ValueOf(cf)
for i := 0; i < nval.Elem().NumField(); i++ {
field := ntype.Field(i)
v := nval.Elem().FieldByName(field.Name)
lv := lval.Elem().FieldByName(field.Name)
log.Info("Checking value for", "field", field.Name)
if lv.Kind() != reflect.Invalid {
// If core.ChainConfig doesn't have this field, skip it.
if v.Type() == lv.Type() && lv.CanSet() {
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v.Set(lv)
} else {
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convertAndSet(v, lv)
}
}
}
return result
}
func (b *Backend) GetTrie(h core.Hash) (core.Trie, error) {
tr, err := trie.NewStateTrie(trie.TrieID(common.Hash(h)), trie.NewDatabase(b.b.ChainDb(), b.trieConfig))
if err != nil {
return nil, err
}
return NewWrappedTrie(tr), nil
}
func (b *Backend) GetAccountTrie(stateRoot core.Hash, account core.Address) (core.Trie, error) {
tr, err := b.GetTrie(stateRoot)
if err != nil {
return nil, err
}
act, err := tr.GetAccount(account)
if err != nil {
return nil, err
}
acTr, err := trie.NewStateTrie(trie.StorageTrieID(common.Hash(stateRoot), crypto.Keccak256Hash(account[:]), common.Hash(act.Root)), trie.NewDatabase(b.b.ChainDb(), b.trieConfig))
if err != nil {
return nil, err
}
return NewWrappedTrie(acTr), nil
}
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func (b *Backend) GetContractCode(h core.Hash) ([]byte, error) {
return state.NewDatabase(b.b.ChainDb()).ContractCode(common.Address{}, common.Hash(h))
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}