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machine.go
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machine.go
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package ingestion
import (
"context"
"fmt"
"github.com/rs/zerolog"
"github.com/onflow/flow-go/engine/common/requester"
"github.com/onflow/flow-go/engine/execution"
"github.com/onflow/flow-go/engine/execution/computation"
"github.com/onflow/flow-go/engine/execution/ingestion/stop"
"github.com/onflow/flow-go/engine/execution/ingestion/uploader"
"github.com/onflow/flow-go/engine/execution/provider"
"github.com/onflow/flow-go/engine/execution/state"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/module"
"github.com/onflow/flow-go/module/mempool/entity"
"github.com/onflow/flow-go/state/protocol"
"github.com/onflow/flow-go/state/protocol/events"
"github.com/onflow/flow-go/storage"
)
// Machine forwards blocks and collections to the core for processing.
type Machine struct {
events.Noop // satisfy protocol events consumer interface
log zerolog.Logger
core *Core
throttle Throttle
broadcaster provider.ProviderEngine
uploader *uploader.Manager
execState state.ExecutionState
computationManager computation.ComputationManager
}
type CollectionRequester interface {
module.ReadyDoneAware
WithHandle(requester.HandleFunc)
}
func NewMachine(
logger zerolog.Logger,
protocolEvents *events.Distributor,
collectionRequester CollectionRequester,
collectionFetcher CollectionFetcher,
headers storage.Headers,
blocks storage.Blocks,
collections storage.Collections,
execState state.ExecutionState,
state protocol.State,
metrics module.ExecutionMetrics,
computationManager computation.ComputationManager,
broadcaster provider.ProviderEngine,
uploader *uploader.Manager,
stopControl *stop.StopControl,
) (*Machine, module.ReadyDoneAware, error) {
e := &Machine{
log: logger.With().Str("engine", "ingestion_machine").Logger(),
broadcaster: broadcaster,
uploader: uploader,
execState: execState,
computationManager: computationManager,
}
throttle, err := NewBlockThrottle(
logger,
state,
execState,
headers,
)
if err != nil {
return nil, nil, fmt.Errorf("failed to create block throttle: %w", err)
}
core, err := NewCore(
logger,
throttle,
execState,
stopControl,
blocks,
collections,
e,
collectionFetcher,
e,
metrics,
)
if err != nil {
return nil, nil, fmt.Errorf("failed to create ingestion core: %w", err)
}
e.throttle = throttle
e.core = core
protocolEvents.AddConsumer(e)
collectionRequester.WithHandle(func(originID flow.Identifier, entity flow.Entity) {
collection, ok := entity.(*flow.Collection)
if !ok {
e.log.Error().Msgf("invalid entity type (%T)", entity)
return
}
e.core.OnCollection(collection)
})
return e, core, nil
}
// Protocol Events implementation
func (e *Machine) BlockProcessable(header *flow.Header, qc *flow.QuorumCertificate) {
err := e.throttle.OnBlock(qc.BlockID, header.Height)
if err != nil {
e.log.Fatal().Err(err).Msgf("error processing block %v (qc.BlockID: %v, blockID: %v)",
header.Height, qc.BlockID, header.ID())
}
}
func (e *Machine) BlockFinalized(b *flow.Header) {
e.throttle.OnBlockFinalized(b.Height)
}
// EventConsumer implementation
var _ EventConsumer = (*Machine)(nil)
func (e *Machine) BeforeComputationResultSaved(
ctx context.Context,
result *execution.ComputationResult,
) {
err := e.uploader.Upload(ctx, result)
if err != nil {
e.log.Err(err).Msg("error while uploading block")
// continue processing. uploads should not block execution
}
}
func (e *Machine) OnComputationResultSaved(
ctx context.Context,
result *execution.ComputationResult,
) string {
header := result.BlockExecutionResult.ExecutableBlock.Block.Header
broadcasted, err := e.broadcaster.BroadcastExecutionReceipt(
ctx, header.Height, result.ExecutionReceipt)
if err != nil {
e.log.Err(err).Msg("critical: failed to broadcast the receipt")
}
return fmt.Sprintf("broadcasted: %v", broadcasted)
}
// BlockExecutor implementation
var _ BlockExecutor = (*Machine)(nil)
func (e *Machine) ExecuteBlock(ctx context.Context, executableBlock *entity.ExecutableBlock) (*execution.ComputationResult, error) {
parentID := executableBlock.Block.Header.ParentID
parentErID, err := e.execState.GetExecutionResultID(ctx, parentID)
if err != nil {
return nil, fmt.Errorf("failed to get parent execution result ID %v: %w", parentID, err)
}
snapshot := e.execState.NewStorageSnapshot(*executableBlock.StartState,
executableBlock.Block.Header.ParentID,
executableBlock.Block.Header.Height-1,
)
computationResult, err := e.computationManager.ComputeBlock(
ctx,
parentErID,
executableBlock,
snapshot)
if err != nil {
return nil, fmt.Errorf("failed to compute block: %w", err)
}
return computationResult, nil
}