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manager.go
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manager.go
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package computation
import (
"context"
"fmt"
"github.com/onflow/cadence/runtime"
"github.com/rs/zerolog"
"github.com/onflow/flow-go/engine/execution"
"github.com/onflow/flow-go/engine/execution/computation/computer"
"github.com/onflow/flow-go/engine/execution/computation/query"
"github.com/onflow/flow-go/fvm"
reusableRuntime "github.com/onflow/flow-go/fvm/runtime"
"github.com/onflow/flow-go/fvm/storage/derived"
"github.com/onflow/flow-go/fvm/storage/snapshot"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/module"
"github.com/onflow/flow-go/module/executiondatasync/provider"
"github.com/onflow/flow-go/module/mempool/entity"
"github.com/onflow/flow-go/state/protocol"
"github.com/onflow/flow-go/utils/logging"
)
const (
ReusableCadenceRuntimePoolSize = 1000
)
type ComputationManager interface {
ExecuteScript(
ctx context.Context,
script []byte,
arguments [][]byte,
blockHeader *flow.Header,
snapshot snapshot.StorageSnapshot,
) (
[]byte,
uint64,
error,
)
ComputeBlock(
ctx context.Context,
parentBlockExecutionResultID flow.Identifier,
block *entity.ExecutableBlock,
snapshot snapshot.StorageSnapshot,
) (
*execution.ComputationResult,
error,
)
GetAccount(
ctx context.Context,
addr flow.Address,
header *flow.Header,
snapshot snapshot.StorageSnapshot,
) (
*flow.Account,
error,
)
}
type ComputationConfig struct {
query.QueryConfig
CadenceTracing bool
ExtensiveTracing bool
DerivedDataCacheSize uint
MaxConcurrency int
// When NewCustomVirtualMachine is nil, the manager will create a standard
// fvm virtual machine via fvm.NewVirtualMachine. Otherwise, the manager
// will create a virtual machine using this function.
//
// Note that this is primarily used for testing.
NewCustomVirtualMachine func() fvm.VM
}
// Manager manages computation and execution
type Manager struct {
log zerolog.Logger
vm fvm.VM
blockComputer computer.BlockComputer
queryExecutor query.Executor
derivedChainData *derived.DerivedChainData
}
var _ ComputationManager = &Manager{}
func New(
logger zerolog.Logger,
metrics module.ExecutionMetrics,
tracer module.Tracer,
me module.Local,
protoState protocol.State,
vmCtx fvm.Context,
committer computer.ViewCommitter,
executionDataProvider provider.Provider,
params ComputationConfig,
) (*Manager, error) {
log := logger.With().Str("engine", "computation").Logger()
var vm fvm.VM
if params.NewCustomVirtualMachine != nil {
vm = params.NewCustomVirtualMachine()
} else {
vm = fvm.NewVirtualMachine()
}
chainID := vmCtx.Chain.ChainID()
options := DefaultFVMOptions(chainID, params.CadenceTracing, params.ExtensiveTracing)
vmCtx = fvm.NewContextFromParent(vmCtx, options...)
blockComputer, err := computer.NewBlockComputer(
vm,
vmCtx,
metrics,
tracer,
log.With().Str("component", "block_computer").Logger(),
committer,
me,
executionDataProvider,
nil, // TODO(ramtin): update me with proper consumers
protoState,
params.MaxConcurrency,
)
if err != nil {
return nil, fmt.Errorf("cannot create block computer: %w", err)
}
derivedChainData, err := derived.NewDerivedChainData(params.DerivedDataCacheSize)
if err != nil {
return nil, fmt.Errorf("cannot create derived data cache: %w", err)
}
queryExecutor := query.NewQueryExecutor(
params.QueryConfig,
logger,
metrics,
vm,
vmCtx,
derivedChainData,
query.NewProtocolStateWrapper(protoState),
)
e := Manager{
log: log,
vm: vm,
blockComputer: blockComputer,
queryExecutor: queryExecutor,
derivedChainData: derivedChainData,
}
return &e, nil
}
func (e *Manager) VM() fvm.VM {
return e.vm
}
func (e *Manager) ComputeBlock(
ctx context.Context,
parentBlockExecutionResultID flow.Identifier,
block *entity.ExecutableBlock,
snapshot snapshot.StorageSnapshot,
) (*execution.ComputationResult, error) {
e.log.Debug().
Hex("block_id", logging.Entity(block.Block)).
Msg("received complete block")
derivedBlockData := e.derivedChainData.GetOrCreateDerivedBlockData(
block.ID(),
block.ParentID())
result, err := e.blockComputer.ExecuteBlock(
ctx,
parentBlockExecutionResultID,
block,
snapshot,
derivedBlockData)
if err != nil {
e.log.Error().
Hex("block_id", logging.Entity(block.Block)).
Msg("failed to compute block result")
return nil, fmt.Errorf("failed to execute block: %w", err)
}
e.log.Debug().
Hex("block_id", logging.Entity(result.ExecutableBlock.Block)).
Msg("computed block result")
return result, nil
}
func (e *Manager) ExecuteScript(
ctx context.Context,
code []byte,
arguments [][]byte,
blockHeader *flow.Header,
snapshot snapshot.StorageSnapshot,
) ([]byte, uint64, error) {
return e.queryExecutor.ExecuteScript(ctx,
code,
arguments,
blockHeader,
snapshot)
}
func (e *Manager) GetAccount(
ctx context.Context,
address flow.Address,
blockHeader *flow.Header,
snapshot snapshot.StorageSnapshot,
) (
*flow.Account,
error,
) {
return e.queryExecutor.GetAccount(
ctx,
address,
blockHeader,
snapshot)
}
func (e *Manager) QueryExecutor() query.Executor {
return e.queryExecutor
}
func DefaultFVMOptions(chainID flow.ChainID, cadenceTracing bool, extensiveTracing bool) []fvm.Option {
options := []fvm.Option{
fvm.WithChain(chainID.Chain()),
fvm.WithReusableCadenceRuntimePool(
reusableRuntime.NewReusableCadenceRuntimePool(
ReusableCadenceRuntimePoolSize,
runtime.Config{
TracingEnabled: cadenceTracing,
// Attachments are enabled everywhere except for Mainnet
AttachmentsEnabled: chainID != flow.Mainnet,
},
)),
fvm.WithEVMEnabled(true),
}
if extensiveTracing {
options = append(options, fvm.WithExtensiveTracing())
}
return options
}