backend

package
v0.33.33-pebble-chunk-... Latest Latest
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 Go to latest Published: Jun 14, 2024 License: AGPL-3.0 Imports: 40 Imported by: 4

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Constants

View Source 
const DefaultConnectionPoolSize = 250

DefaultConnectionPoolSize is the default size for the connection pool to collection and execution nodes

View Source 
const DefaultLoggedScriptsCacheSize = 1_000_000

DefaultLoggedScriptsCacheSize is the default size of the lookup cache used to dedupe logs of scripts sent to ENs limiting cache size to 16MB and does not affect script execution, only for keeping logs tidy

View Source 
const DefaultMaxHeightRange = 250

DefaultMaxHeightRange is the default maximum size of range requests.

View Source 
const DefaultSnapshotHistoryLimit = 500

DefaultSnapshotHistoryLimit the amount of blocks to look back in state when recursively searching for a valid snapshot

Variables

This section is empty.

Functions

func IsInsufficientExecutionReceipts added in v0.30.0 

func IsInsufficientExecutionReceipts(err error) bool

func NewNetworkAPI added in v0.28.0 

func NewNetworkAPI(
	state protocol.State,
	chainID flow.ChainID,
	headers storage.Headers,
	snapshotHistoryLimit int,
) *backendNetwork

NetworkAPI func

The observer and access nodes need to be able to handle GetNetworkParameters and GetLatestProtocolStateSnapshot RPCs so this logic was split into the backendNetwork so that we can ignore the rest of the backend logic

Types

type Backend 

type Backend struct {
	// contains filtered or unexported fields
}

Backend implements the Access API.

It is composed of several sub-backends that implement part of the Access API.

Script related calls are handled by backendScripts. Transaction related calls are handled by backendTransactions. Block Header related calls are handled by backendBlockHeaders. Block details related calls are handled by backendBlockDetails. Event related calls are handled by backendEvents. Account related calls are handled by backendAccounts.

All remaining calls are handled by the base Backend in this file.

func New 

func New(params Params) (*Backend, error)

New creates backend instance

func (*Backend) ExecuteScriptAtBlockHeight 

func (b *Backend) ExecuteScriptAtBlockHeight(
	ctx context.Context,
	blockHeight uint64,
	script []byte,
	arguments [][]byte,
) ([]byte, error)

ExecuteScriptAtBlockHeight executes provided script at the provided block height.

func (*Backend) ExecuteScriptAtBlockID 

func (b *Backend) ExecuteScriptAtBlockID(
	ctx context.Context,
	blockID flow.Identifier,
	script []byte,
	arguments [][]byte,
) ([]byte, error)

ExecuteScriptAtBlockID executes provided script at the provided block ID.

func (*Backend) ExecuteScriptAtLatestBlock 

func (b *Backend) ExecuteScriptAtLatestBlock(
	ctx context.Context,
	script []byte,
	arguments [][]byte,
) ([]byte, error)

ExecuteScriptAtLatestBlock executes provided script at the latest sealed block.

func (*Backend) GetAccount 

func (b *Backend) GetAccount(ctx context.Context, address flow.Address) (*flow.Account, error)

GetAccount returns the account details at the latest sealed block. Alias for GetAccountAtLatestBlock

func (*Backend) GetAccountAtBlockHeight 

func (b *Backend) GetAccountAtBlockHeight(
	ctx context.Context,
	address flow.Address,
	height uint64,
) (*flow.Account, error)

GetAccountAtBlockHeight returns the account details at the given block height

func (*Backend) GetAccountAtLatestBlock 

func (b *Backend) GetAccountAtLatestBlock(ctx context.Context, address flow.Address) (*flow.Account, error)

GetAccountAtLatestBlock returns the account details at the latest sealed block.

func (*Backend) GetBlockByHeight 

func (b *Backend) GetBlockByHeight(ctx context.Context, height uint64) (*flow.Block, flow.BlockStatus, error)

func (*Backend) GetBlockByID 

func (b *Backend) GetBlockByID(ctx context.Context, id flow.Identifier) (*flow.Block, flow.BlockStatus, error)

func (*Backend) GetBlockHeaderByHeight 

func (b *Backend) GetBlockHeaderByHeight(ctx context.Context, height uint64) (*flow.Header, flow.BlockStatus, error)

func (*Backend) GetBlockHeaderByID 

func (b *Backend) GetBlockHeaderByID(ctx context.Context, id flow.Identifier) (*flow.Header, flow.BlockStatus, error)

func (*Backend) GetCollectionByID 

func (b *Backend) GetCollectionByID(_ context.Context, colID flow.Identifier) (*flow.LightCollection, error)

func (*Backend) GetEventsForBlockIDs 

func (b *Backend) GetEventsForBlockIDs(
	ctx context.Context,
	eventType string,
	blockIDs []flow.Identifier,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) ([]flow.BlockEvents, error)

GetEventsForBlockIDs retrieves events for all the specified block IDs that have the given type

func (*Backend) GetEventsForHeightRange 

func (b *Backend) GetEventsForHeightRange(
	ctx context.Context,
	eventType string,
	startHeight, endHeight uint64,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) ([]flow.BlockEvents, error)

GetEventsForHeightRange retrieves events for all sealed blocks between the start block height and the end block height (inclusive) that have the given type.

func (*Backend) GetExecutionResultByID added in v0.23.5 

func (b *Backend) GetExecutionResultByID(ctx context.Context, id flow.Identifier) (*flow.ExecutionResult, error)

GetExecutionResultByID gets an execution result by its ID.

func (*Backend) GetExecutionResultForBlockID added in v0.21.0 

func (b *Backend) GetExecutionResultForBlockID(ctx context.Context, blockID flow.Identifier) (*flow.ExecutionResult, error)

func (*Backend) GetFullCollectionByID added in v0.33.26 

func (b *Backend) GetFullCollectionByID(_ context.Context, colID flow.Identifier) (*flow.Collection, error)

func (*Backend) GetLatestBlock 

func (b *Backend) GetLatestBlock(ctx context.Context, isSealed bool) (*flow.Block, flow.BlockStatus, error)

func (*Backend) GetLatestBlockHeader 

func (b *Backend) GetLatestBlockHeader(ctx context.Context, isSealed bool) (*flow.Header, flow.BlockStatus, error)

func (*Backend) GetLatestProtocolStateSnapshot added in v0.15.0 

func (b *Backend) GetLatestProtocolStateSnapshot(_ context.Context) ([]byte, error)

GetLatestProtocolStateSnapshot returns the latest finalized snapshot

func (*Backend) GetNetworkParameters 

func (b *Backend) GetNetworkParameters(_ context.Context) access.NetworkParameters

func (*Backend) GetNodeVersionInfo added in v0.31.0 

func (b *Backend) GetNodeVersionInfo(_ context.Context) (*access.NodeVersionInfo, error)

GetNodeVersionInfo returns node version information such as semver, commit, sporkID, protocolVersion, etc

func (*Backend) GetProtocolStateSnapshotByBlockID added in v0.33.1 

func (b *Backend) GetProtocolStateSnapshotByBlockID(_ context.Context, blockID flow.Identifier) ([]byte, error)

GetProtocolStateSnapshotByBlockID returns serializable Snapshot for a block, by blockID. The requested block must be finalized, otherwise an error is returned. Expected errors during normal operation:

  • status.Error[codes.NotFound] - No block with the given ID was found
  • status.Error[codes.InvalidArgument] - Block ID will never have a valid snapshot: 1. A block was found, but it is not finalized and is below the finalized height, so it will never be finalized. 2. A block was found, however its sealing segment spans an epoch phase transition, yielding an invalid snapshot.
  • status.Error[codes.FailedPrecondition] - A block was found, but it is not finalized and is above the finalized height. The block may or may not be finalized in the future; the client can retry later.

func (*Backend) GetProtocolStateSnapshotByHeight added in v0.33.1 

func (b *Backend) GetProtocolStateSnapshotByHeight(_ context.Context, blockHeight uint64) ([]byte, error)

GetProtocolStateSnapshotByHeight returns serializable Snapshot by block height. The block must be finalized (otherwise the by-height query is ambiguous). Expected errors during normal operation:

  • status.Error[codes.NotFound] - No block with the given height was found. The block height may or may not be finalized in the future; the client can retry later.
  • status.Error[codes.InvalidArgument] - A block was found, however its sealing segment spans an epoch phase transition, yielding an invalid snapshot. Therefore we will never return a snapshot for this block height.

func (*Backend) GetSystemTransaction added in v0.33.1 

func (b *Backend) GetSystemTransaction(ctx context.Context, _ flow.Identifier) (*flow.TransactionBody, error)

GetSystemTransaction returns system transaction

func (*Backend) GetSystemTransactionResult added in v0.33.1 

func (b *Backend) GetSystemTransactionResult(ctx context.Context, blockID flow.Identifier, requiredEventEncodingVersion entities.EventEncodingVersion) (*access.TransactionResult, error)

GetSystemTransactionResult returns system transaction result

func (*Backend) GetTransaction 

func (b *Backend) GetTransaction(ctx context.Context, txID flow.Identifier) (*flow.TransactionBody, error)

func (*Backend) GetTransactionResult 

func (b *Backend) GetTransactionResult(
	ctx context.Context,
	txID flow.Identifier,
	blockID flow.Identifier,
	collectionID flow.Identifier,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) (*access.TransactionResult, error)

func (*Backend) GetTransactionResultByIndex added in v0.24.8 

func (b *Backend) GetTransactionResultByIndex(
	ctx context.Context,
	blockID flow.Identifier,
	index uint32,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) (*access.TransactionResult, error)

GetTransactionResultByIndex returns transactions Results for an index in a block that is executed, pending or finalized transactions return errors

func (*Backend) GetTransactionResultsByBlockID added in v0.24.11 

func (b *Backend) GetTransactionResultsByBlockID(
	ctx context.Context,
	blockID flow.Identifier,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) ([]*access.TransactionResult, error)

func (*Backend) GetTransactionsByBlockID added in v0.24.11 

func (b *Backend) GetTransactionsByBlockID(
	_ context.Context,
	blockID flow.Identifier,
) ([]*flow.TransactionBody, error)

func (*Backend) LookupErrorMessageByIndex added in v0.33.13 

func (b *Backend) LookupErrorMessageByIndex(
	ctx context.Context,
	blockID flow.Identifier,
	height uint64,
	index uint32,
) (string, error)

LookupErrorMessageByIndex returns transaction error message for specified transaction using its index. If an error message for transaction can be found in cache then it will be used to serve the request, otherwise an RPC call will be made to the EN to fetch that error message, fetched value will be cached in the LRU cache. Expected errors during normal operation:

  • status.Error[codes.NotFound] - transaction result for given block ID and tx index is not available.
  • InsufficientExecutionReceipts - found insufficient receipts for given block ID.
  • status.Error - remote GRPC call to EN has failed.

func (*Backend) LookupErrorMessageByTransactionID added in v0.33.13 

func (b *Backend) LookupErrorMessageByTransactionID(
	ctx context.Context,
	blockID flow.Identifier,
	transactionID flow.Identifier,
) (string, error)

LookupErrorMessageByTransactionID returns transaction error message for specified transaction. If an error message for transaction can be found in the cache then it will be used to serve the request, otherwise an RPC call will be made to the EN to fetch that error message, fetched value will be cached in the LRU cache. Expected errors during normal operation:

  • InsufficientExecutionReceipts - found insufficient receipts for given block ID.
  • status.Error - remote GRPC call to EN has failed.

func (*Backend) LookupErrorMessagesByBlockID added in v0.33.13 

func (b *Backend) LookupErrorMessagesByBlockID(
	ctx context.Context,
	blockID flow.Identifier,
	height uint64,
) (map[flow.Identifier]string, error)

LookupErrorMessagesByBlockID returns all error messages for failed transactions by blockID. An RPC call will be made to the EN to fetch missing errors messages, fetched value will be cached in the LRU cache. Expected errors during normal operation:

  • status.Error[codes.NotFound] - transaction results for given block ID are not available.
  • InsufficientExecutionReceipts - found insufficient receipts for given block ID.
  • status.Error - remote GRPC call to EN has failed.

func (*Backend) Ping 

func (b *Backend) Ping(ctx context.Context) error

Ping responds to requests when the server is up.

func (*Backend) ProcessFinalizedBlockHeight added in v0.33.1 

func (b *Backend) ProcessFinalizedBlockHeight(height uint64) error

ATTENTION: might be a source of problems in future. We run this code on finalization gorotuine, potentially lagging finalization events if operations take long time. We might need to move this logic on dedicated goroutine and provide a way to skip finalization events if they are delivered too often for this engine. An example of similar approach - https://github.com/onflow/flow-go/blob/10b0fcbf7e2031674c00f3cdd280f27bd1b16c47/engine/common/follower/compliance_engine.go#L201.. No errors expected during normal operations.

func (*Backend) SendRawTransaction 

func (b *Backend) SendRawTransaction(
	ctx context.Context,
	tx *flow.TransactionBody,
) error

SendRawTransaction sends a raw transaction to the collection node

func (*Backend) SendTransaction 

func (b *Backend) SendTransaction(
	ctx context.Context,
	tx *flow.TransactionBody,
) error

SendTransaction forwards the transaction to the collection node

type Communicator added in v0.32.0 

type Communicator interface {
	CallAvailableNode(

		nodes flow.IdentityList,

		call func(node *flow.Identity) error,

		shouldTerminateOnError func(node *flow.Identity, err error) bool,
	) error
}

type Config added in v0.32.0 

type Config struct {
	ExecutionClientTimeout    time.Duration                   // execution API GRPC client timeout
	CollectionClientTimeout   time.Duration                   // collection API GRPC client timeout
	ConnectionPoolSize        uint                            // size of the cache for storing collection and execution connections
	MaxHeightRange            uint                            // max size of height range requests
	PreferredExecutionNodeIDs []string                        // preferred list of upstream execution node IDs
	FixedExecutionNodeIDs     []string                        // fixed list of execution node IDs to choose from if no node ID can be chosen from the PreferredExecutionNodeIDs
	CircuitBreakerConfig      connection.CircuitBreakerConfig // the configuration for circuit breaker
	ScriptExecutionMode       string                          // the mode in which scripts are executed
	EventQueryMode            string                          // the mode in which events are queried
	TxResultQueryMode         string                          // the mode in which tx results are queried
}

Config defines the configurable options for creating Backend

type EventsIndex added in v0.33.9 

type EventsIndex struct {
	// contains filtered or unexported fields
}

EventsIndex implements a wrapper around `storage.Events` ensuring that needed data has been synced and is available to the client. Note: `EventsIndex` is created with empty report due to the next reasoning: When the index is initially bootstrapped, the indexer needs to load an execution state checkpoint from disk and index all the data. This process can take more than 1 hour on some systems. Consequently, the Initialize pattern is implemented to enable the Access API to start up and serve queries before the index is fully ready. During the initialization phase, all calls to retrieve data from this struct should return indexer.ErrIndexNotInitialized. The caller is responsible for handling this error appropriately for the method.

func NewEventsIndex added in v0.33.9 

func NewEventsIndex(events storage.Events) *EventsIndex

func (*EventsIndex) ByBlockID added in v0.33.13 

func (e *EventsIndex) ByBlockID(blockID flow.Identifier, height uint64) ([]flow.Event, error)

ByBlockID checks data availability and returns events for a block Expected errors:

  • indexer.ErrIndexNotInitialized if the `EventsIndex` has not been initialized
  • storage.ErrHeightNotIndexed when data is unavailable
  • codes.NotFound if result cannot be provided by storage due to the absence of data.

func (*EventsIndex) ByBlockIDTransactionID added in v0.33.13 

func (e *EventsIndex) ByBlockIDTransactionID(blockID flow.Identifier, height uint64, transactionID flow.Identifier) ([]flow.Event, error)

ByBlockIDTransactionID checks data availability and return events for the given block ID and transaction ID Expected errors:

  • indexer.ErrIndexNotInitialized if the `EventsIndex` has not been initialized
  • storage.ErrHeightNotIndexed when data is unavailable
  • codes.NotFound if result cannot be provided by storage due to the absence of data.

func (*EventsIndex) ByBlockIDTransactionIndex added in v0.33.13 

func (e *EventsIndex) ByBlockIDTransactionIndex(blockID flow.Identifier, height uint64, txIndex uint32) ([]flow.Event, error)

ByBlockIDTransactionIndex checks data availability and return events for the transaction at given index in a given block Expected errors:

  • indexer.ErrIndexNotInitialized if the `EventsIndex` has not been initialized
  • storage.ErrHeightNotIndexed when data is unavailable
  • codes.NotFound if result cannot be provided by storage due to the absence of data.

func (*EventsIndex) HighestIndexedHeight added in v0.33.9 

func (e *EventsIndex) HighestIndexedHeight() (uint64, error)

HighestIndexedHeight returns the highest height indexed by the execution state indexer. Expected errors: - indexer.ErrIndexNotInitialized if the EventsIndex has not been initialized

func (*EventsIndex) Initialize added in v0.33.9 

func (e *EventsIndex) Initialize(indexReporter state_synchronization.IndexReporter) error

Initialize replaces a previously non-initialized reporter. Can be called once. No errors are expected during normal operations.

func (*EventsIndex) LowestIndexedHeight added in v0.33.9 

func (e *EventsIndex) LowestIndexedHeight() (uint64, error)

LowestIndexedHeight returns the lowest height indexed by the execution state indexer. Expected errors: - indexer.ErrIndexNotInitialized if the EventsIndex has not been initialized

type IndexQueryMode added in v0.33.1 

type IndexQueryMode int
const (
	// IndexQueryModeLocalOnly executes scripts and gets accounts using only local storage
	IndexQueryModeLocalOnly IndexQueryMode = iota + 1

	// IndexQueryModeExecutionNodesOnly executes scripts and gets accounts using only
	// execution nodes
	IndexQueryModeExecutionNodesOnly

	// IndexQueryModeFailover executes scripts and gets accounts using local storage first,
	// then falls back to execution nodes if data is not available for the height or if request
	// failed due to a non-user error.
	IndexQueryModeFailover

	// IndexQueryModeCompare executes scripts and gets accounts using both local storage and
	// execution nodes and compares the results. The execution node result is always returned.
	IndexQueryModeCompare
)

func ParseIndexQueryMode added in v0.33.1 

func ParseIndexQueryMode(s string) (IndexQueryMode, error)

func (IndexQueryMode) String added in v0.33.1 

func (m IndexQueryMode) String() string

type InsufficientExecutionReceipts added in v0.17.0 

type InsufficientExecutionReceipts struct {
	// contains filtered or unexported fields
}

InsufficientExecutionReceipts indicates that no execution receipt were found for a given block ID

func (InsufficientExecutionReceipts) Error added in v0.17.0 

func (e InsufficientExecutionReceipts) Error() string

type MainNodeSelector added in v0.32.0 

type MainNodeSelector struct {
	// contains filtered or unexported fields
}

MainNodeSelector is a specific implementation of the node selector. Which performs in-order node selection using fixed list of pre-defined nodes.

func NewMainNodeSelector added in v0.32.0 

func NewMainNodeSelector(nodes flow.IdentityList) *MainNodeSelector

func (*MainNodeSelector) HasNext added in v0.32.0 

func (e *MainNodeSelector) HasNext() bool

HasNext returns true if next node is available.

func (*MainNodeSelector) Next added in v0.32.0 

func (e *MainNodeSelector) Next() *flow.Identity

Next returns the next node in the selector.

type NodeCommunicator added in v0.32.0 

type NodeCommunicator struct {
	// contains filtered or unexported fields
}

NodeCommunicator is responsible for calling available nodes in the backend.

func NewNodeCommunicator added in v0.32.0 

func NewNodeCommunicator(circuitBreakerEnabled bool) *NodeCommunicator

NewNodeCommunicator creates a new instance of NodeCommunicator.

func (*NodeCommunicator) CallAvailableNode added in v0.32.0 

func (b *NodeCommunicator) CallAvailableNode(

	nodes flow.IdentityList,

	call func(id *flow.Identity) error,

	shouldTerminateOnError func(node *flow.Identity, err error) bool,
) error

CallAvailableNode calls the provided function on the available nodes. It iterates through the nodes and executes the function. If an error occurs, it applies the custom error terminator (if provided) and keeps track of the errors. If the error occurs in circuit breaker, it continues to the next node. If the maximum failed request count is reached, it returns the accumulated errors.

type NodeSelector added in v0.32.0 

type NodeSelector interface {
	Next() *flow.Identity
	HasNext() bool
}

NodeSelector is an interface that represents the ability to select node identities that the access node is trying to reach. It encapsulates the internal logic of node selection and provides a way to change implementations for different types of nodes. Implementations of this interface should define the Next method, which returns the next node identity to be selected. HasNext checks if there is next node available.

type NodeSelectorFactory added in v0.32.0 

type NodeSelectorFactory struct {
	// contains filtered or unexported fields
}

NodeSelectorFactory is a factory for creating node selectors based on factory configuration and node type. Supported configurations: circuitBreakerEnabled = true - nodes will be pseudo-randomly sampled and picked in-order. circuitBreakerEnabled = false - nodes will be picked from proposed list in-order without any changes.

func (*NodeSelectorFactory) SelectNodes added in v0.32.0 

func (n *NodeSelectorFactory) SelectNodes(nodes flow.IdentityList) (NodeSelector, error)

SelectNodes selects the configured number of node identities from the provided list of nodes and returns the node selector to iterate through them.

type Params added in v0.32.0 

type Params struct {
	State                     protocol.State
	CollectionRPC             accessproto.AccessAPIClient
	HistoricalAccessNodes     []accessproto.AccessAPIClient
	Blocks                    storage.Blocks
	Headers                   storage.Headers
	Collections               storage.Collections
	Transactions              storage.Transactions
	ExecutionReceipts         storage.ExecutionReceipts
	ExecutionResults          storage.ExecutionResults
	ChainID                   flow.ChainID
	AccessMetrics             module.AccessMetrics
	ConnFactory               connection.ConnectionFactory
	RetryEnabled              bool
	MaxHeightRange            uint
	PreferredExecutionNodeIDs []string
	FixedExecutionNodeIDs     []string
	Log                       zerolog.Logger
	SnapshotHistoryLimit      int
	Communicator              Communicator
	TxResultCacheSize         uint
	TxErrorMessagesCacheSize  uint
	ScriptExecutor            execution.ScriptExecutor
	ScriptExecutionMode       IndexQueryMode
	EventQueryMode            IndexQueryMode
	EventsIndex               *EventsIndex
	TxResultQueryMode         IndexQueryMode
	TxResultsIndex            *TransactionResultsIndex
}

type Retry 

type Retry struct {
	// contains filtered or unexported fields
}

Retry implements a simple retry mechanism for transaction submission.

func (*Retry) Activate 

func (r *Retry) Activate() *Retry

func (*Retry) IsActive 

func (r *Retry) IsActive() bool

func (*Retry) RegisterTransaction 

func (r *Retry) RegisterTransaction(height uint64, tx *flow.TransactionBody)

RegisterTransaction adds a transaction that could possibly be retried

func (*Retry) Retry 

func (r *Retry) Retry(height uint64) error

Retry attempts to resend transactions for a specified block height. It performs cleanup operations, including pruning old transactions, and retries sending transactions that are still pending. The method takes a block height as input. If the provided height is lower than flow.DefaultTransactionExpiry, no retries are performed, and the method returns nil. No errors expected during normal operations.

func (*Retry) SetBackend 

func (r *Retry) SetBackend(b *Backend) *Retry

type ScriptExecutor added in v0.32.2 

type ScriptExecutor struct {
	// contains filtered or unexported fields
}

func NewScriptExecutor added in v0.32.2 

func NewScriptExecutor(log zerolog.Logger, minHeight, maxHeight uint64) *ScriptExecutor

func (*ScriptExecutor) ExecuteAtBlockHeight added in v0.32.2 

func (s *ScriptExecutor) ExecuteAtBlockHeight(ctx context.Context, script []byte, arguments [][]byte, height uint64) ([]byte, error)

ExecuteAtBlockHeight executes provided script at the provided block height against a local execution state.

Expected errors:

  • storage.ErrNotFound if the register or block height is not found
  • storage.ErrHeightNotIndexed if the data for the block height is not available. this could be because the height is not within the index block range, or the index is not ready.

func (*ScriptExecutor) GetAccountAtBlockHeight added in v0.32.2 

func (s *ScriptExecutor) GetAccountAtBlockHeight(ctx context.Context, address flow.Address, height uint64) (*flow.Account, error)

GetAccountAtBlockHeight returns the account at the provided block height from a local execution state.

Expected errors:

  • storage.ErrNotFound if the account or block height is not found
  • storage.ErrHeightNotIndexed if the data for the block height is not available. this could be because the height is not within the index block range, or the index is not ready.

func (*ScriptExecutor) Initialize added in v0.33.9 

func (s *ScriptExecutor) Initialize(indexReporter state_synchronization.IndexReporter, scriptExecutor *execution.Scripts) error

Initialize initializes the indexReporter and script executor This method can be called at any time after the ScriptExecutor object is created. Any requests made to the other methods will return storage.ErrHeightNotIndexed until this method is called.

func (*ScriptExecutor) SetMaxCompatibleHeight added in v0.32.10 

func (s *ScriptExecutor) SetMaxCompatibleHeight(height uint64)

SetMaxCompatibleHeight sets the highest block height (inclusive) that can be queried using local execution Use this to limit the executable block range supported by the node's current software version.

func (*ScriptExecutor) SetMinCompatibleHeight added in v0.32.10 

func (s *ScriptExecutor) SetMinCompatibleHeight(height uint64)

SetMinCompatibleHeight sets the lowest block height (inclusive) that can be queried using local execution Use this to limit the executable block range supported by the node's current software version.

type TransactionErrorMessage added in v0.33.13 

type TransactionErrorMessage interface {
	// LookupErrorMessageByTransactionID is a function type for getting transaction error message by block ID and transaction ID.
	// Expected errors during normal operation:
	//   - InsufficientExecutionReceipts - found insufficient receipts for given block ID.
	//   - status.Error - remote GRPC call to EN has failed.
	LookupErrorMessageByTransactionID(ctx context.Context, blockID flow.Identifier, transactionID flow.Identifier) (string, error)

	// LookupErrorMessageByIndex is a function type for getting transaction error message by index.
	// Expected errors during normal operation:
	//   - status.Error[codes.NotFound] - transaction result for given block ID and tx index is not available.
	//   - InsufficientExecutionReceipts - found insufficient receipts for given block ID.
	//   - status.Error - remote GRPC call to EN has failed.
	LookupErrorMessageByIndex(ctx context.Context, blockID flow.Identifier, height uint64, index uint32) (string, error)

	// LookupErrorMessagesByBlockID is a function type for getting transaction error messages by block ID.
	// Expected errors during normal operation:
	//   - status.Error[codes.NotFound] - transaction results for given block ID are not available.
	//   - InsufficientExecutionReceipts - found insufficient receipts for given block ID.
	//   - status.Error - remote GRPC call to EN has failed.
	LookupErrorMessagesByBlockID(ctx context.Context, blockID flow.Identifier, height uint64) (map[flow.Identifier]string, error)
}

TransactionErrorMessage declares the lookup transaction error methods by different input parameters.

type TransactionResultsIndex added in v0.33.13 

type TransactionResultsIndex struct {
	// contains filtered or unexported fields
}

TransactionResultsIndex implements a wrapper around `storage.LightTransactionResult` ensuring that needed data has been synced and is available to the client. Note: `TransactionResultsIndex` is created with empty report due to the next reasoning: When the index is initially bootstrapped, the indexer needs to load an execution state checkpoint from disk and index all the data. This process can take more than 1 hour on some systems. Consequently, the Initialize pattern is implemented to enable the Access API to start up and serve queries before the index is fully ready. During the initialization phase, all calls to retrieve data from this struct should return indexer.ErrIndexNotInitialized. The caller is responsible for handling this error appropriately for the method.

func NewTransactionResultsIndex added in v0.33.13 

func NewTransactionResultsIndex(results storage.LightTransactionResults) *TransactionResultsIndex

func (*TransactionResultsIndex) ByBlockID added in v0.33.13 

func (t *TransactionResultsIndex) ByBlockID(blockID flow.Identifier, height uint64) ([]flow.LightTransactionResult, error)

ByBlockID checks data availability and returns all transaction results for a block Expected errors:

  • indexer.ErrIndexNotInitialized if the `TransactionResultsIndex` has not been initialized
  • storage.ErrHeightNotIndexed when data is unavailable
  • codes.NotFound if result cannot be provided by storage due to the absence of data.

func (*TransactionResultsIndex) ByBlockIDTransactionID added in v0.33.13 

func (t *TransactionResultsIndex) ByBlockIDTransactionID(blockID flow.Identifier, height uint64, txID flow.Identifier) (*flow.LightTransactionResult, error)

ByBlockIDTransactionID checks data availability and return the transaction result for the given block ID and transaction ID Expected errors:

  • indexer.ErrIndexNotInitialized if the `TransactionResultsIndex` has not been initialized
  • storage.ErrHeightNotIndexed when data is unavailable
  • codes.NotFound if result cannot be provided by storage due to the absence of data.

func (*TransactionResultsIndex) ByBlockIDTransactionIndex added in v0.33.13 

func (t *TransactionResultsIndex) ByBlockIDTransactionIndex(blockID flow.Identifier, height uint64, index uint32) (*flow.LightTransactionResult, error)

ByBlockIDTransactionIndex checks data availability and return the transaction result for the given blockID and transaction index Expected errors:

  • indexer.ErrIndexNotInitialized if the `TransactionResultsIndex` has not been initialized
  • storage.ErrHeightNotIndexed when data is unavailable
  • codes.NotFound when result cannot be provided by storage due to the absence of data.

func (*TransactionResultsIndex) HighestIndexedHeight added in v0.33.13 

func (t *TransactionResultsIndex) HighestIndexedHeight() (uint64, error)

HighestIndexedHeight returns the highest height indexed by the execution state indexer. Expected errors: - indexer.ErrIndexNotInitialized if the `TransactionResultsIndex` has not been initialized

func (*TransactionResultsIndex) Initialize added in v0.33.13 

func (t *TransactionResultsIndex) Initialize(indexReporter state_synchronization.IndexReporter) error

Initialize replaces a previously non-initialized reporter. Can be called once. No errors are expected during normal operations.

func (*TransactionResultsIndex) LowestIndexedHeight added in v0.33.13 

func (t *TransactionResultsIndex) LowestIndexedHeight() (uint64, error)

LowestIndexedHeight returns the lowest height indexed by the execution state indexer. Expected errors: - indexer.ErrIndexNotInitialized if the `TransactionResultsIndex` has not been initialized

type TransactionsLocalDataProvider added in v0.33.13 

type TransactionsLocalDataProvider struct {
	// contains filtered or unexported fields
}

TransactionsLocalDataProvider provides functionality for retrieving transaction results and error messages from local storages

func (*TransactionsLocalDataProvider) GetTransactionResultByIndexFromStorage added in v0.33.13 

func (t *TransactionsLocalDataProvider) GetTransactionResultByIndexFromStorage(
	ctx context.Context,
	block *flow.Block,
	index uint32,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) (*access.TransactionResult, error)

GetTransactionResultByIndexFromStorage retrieves a transaction result by index from storage. Expected errors during normal operation:

  • codes.NotFound if result cannot be provided by storage due to the absence of data.
  • codes.Internal when event payload conversion failed.
  • indexer.ErrIndexNotInitialized when txResultsIndex not initialized
  • storage.ErrHeightNotIndexed when data is unavailable

All other errors are considered as state corruption (fatal) or internal errors in the transaction error message getter or when deriving transaction status.

func (*TransactionsLocalDataProvider) GetTransactionResultFromStorage added in v0.33.13 

func (t *TransactionsLocalDataProvider) GetTransactionResultFromStorage(
	ctx context.Context,
	block *flow.Block,
	transactionID flow.Identifier,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) (*access.TransactionResult, error)

GetTransactionResultFromStorage retrieves a transaction result from storage by block ID and transaction ID. Expected errors during normal operation:

  • codes.NotFound when result cannot be provided by storage due to the absence of data.
  • codes.Internal if event payload conversion failed.
  • indexer.ErrIndexNotInitialized when txResultsIndex not initialized
  • storage.ErrHeightNotIndexed when data is unavailable

All other errors are considered as state corruption (fatal) or internal errors in the transaction error message getter or when deriving transaction status.

func (*TransactionsLocalDataProvider) GetTransactionResultsByBlockIDFromStorage added in v0.33.13 

func (t *TransactionsLocalDataProvider) GetTransactionResultsByBlockIDFromStorage(
	ctx context.Context,
	block *flow.Block,
	requiredEventEncodingVersion entities.EventEncodingVersion,
) ([]*access.TransactionResult, error)

GetTransactionResultsByBlockIDFromStorage retrieves transaction results by block ID from storage Expected errors during normal operation:

  • codes.NotFound if result cannot be provided by storage due to the absence of data.
  • codes.Internal when event payload conversion failed.
  • indexer.ErrIndexNotInitialized when txResultsIndex not initialized
  • storage.ErrHeightNotIndexed when data is unavailable

All other errors are considered as state corruption (fatal) or internal errors in the transaction error message getter or when deriving transaction status.

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