backend

package
v0.29.0-stable-cadence-4 Latest Latest
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 Go to latest Published: Nov 10, 2022 License: AGPL-3.0 Imports: 30 Imported by: 4

Documentation

Index

Constants

View Source 
const DefaultClientTimeout = 3 * time.Second

DefaultClientTimeout is used when making a GRPC request to a collection node or an execution node

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 = 50

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

Variables

View Source 
var SnapshotHistoryLimitErr = fmt.Errorf("reached the snapshot history limit")

Functions

func NewNetworkAPI added in v0.28.0 

func NewNetworkAPI(state protocol.State, chainID flow.ChainID, 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

func WithClientUnaryInterceptor added in v0.14.6 

func WithClientUnaryInterceptor(timeout time.Duration) grpc.DialOption

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(
	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,
	transactionMetrics module.TransactionMetrics,
	connFactory ConnectionFactory,
	retryEnabled bool,
	maxHeightRange uint,
	preferredExecutionNodeIDs []string,
	fixedExecutionNodeIDs []string,
	log zerolog.Logger,
	snapshotHistoryLimit int,
) *Backend

func (*Backend) ExecuteScriptAtBlockHeight 

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

func (*Backend) ExecuteScriptAtBlockID 

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

func (*Backend) ExecuteScriptAtLatestBlock 

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

func (*Backend) GetAccount 

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

func (*Backend) GetAccountAtBlockHeight 

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

func (*Backend) GetAccountAtLatestBlock 

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

func (*Backend) GetBlockByHeight 

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

func (*Backend) GetBlockByID 

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

func (*Backend) GetBlockHeaderByHeight 

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

func (*Backend) GetBlockHeaderByID 

func (b *Backend) GetBlockHeaderByID(_ context.Context, id flow.Identifier) (*flow.Header, 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,
) ([]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,
) ([]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) GetLatestBlock 

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

func (*Backend) GetLatestBlockHeader 

func (b *Backend) GetLatestBlockHeader(_ context.Context, isSealed bool) (*flow.Header, 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) 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,
) (*access.TransactionResult, error)

func (*Backend) GetTransactionResultByIndex added in v0.24.8 

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

GetTransactionResultByIndex returns TransactionsResults 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,
) ([]*access.TransactionResult, error)

func (*Backend) GetTransactionsByBlockID added in v0.24.11 

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

func (*Backend) NotifyFinalizedBlockHeight 

func (b *Backend) NotifyFinalizedBlockHeight(height uint64)

func (*Backend) Ping 

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

Ping responds to requests when the server is up.

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 CachedClient added in v0.26.17 

type CachedClient struct {
	ClientConn *grpc.ClientConn
	Address    string
	// contains filtered or unexported fields
}

func (*CachedClient) Close added in v0.26.17 

func (s *CachedClient) Close()

type ConnectionFactory 

type ConnectionFactory interface {
	GetAccessAPIClient(address string) (access.AccessAPIClient, io.Closer, error)
	InvalidateAccessAPIClient(address string)
	GetExecutionAPIClient(address string) (execution.ExecutionAPIClient, io.Closer, error)
	InvalidateExecutionAPIClient(address string)
}

ConnectionFactory is used to create an access api client

type ConnectionFactoryImpl 

type ConnectionFactoryImpl struct {
	CollectionGRPCPort        uint
	ExecutionGRPCPort         uint
	CollectionNodeGRPCTimeout time.Duration
	ExecutionNodeGRPCTimeout  time.Duration
	ConnectionsCache          *lru.Cache
	CacheSize                 uint
	AccessMetrics             module.AccessMetrics
	Log                       zerolog.Logger
	// contains filtered or unexported fields
}

func (*ConnectionFactoryImpl) GetAccessAPIClient 

func (cf *ConnectionFactoryImpl) GetAccessAPIClient(address string) (access.AccessAPIClient, io.Closer, error)

func (*ConnectionFactoryImpl) GetExecutionAPIClient added in v0.14.0 

func (cf *ConnectionFactoryImpl) GetExecutionAPIClient(address string) (execution.ExecutionAPIClient, io.Closer, error)

func (*ConnectionFactoryImpl) InvalidateAccessAPIClient added in v0.26.16 

func (cf *ConnectionFactoryImpl) InvalidateAccessAPIClient(address string)

func (*ConnectionFactoryImpl) InvalidateExecutionAPIClient added in v0.26.16 

func (cf *ConnectionFactoryImpl) InvalidateExecutionAPIClient(address 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 ProxyConnectionFactory added in v0.21.0 

type ProxyConnectionFactory struct {
	ConnectionFactory
	// contains filtered or unexported fields
}

func (*ProxyConnectionFactory) GetAccessAPIClient added in v0.21.0 

func (p *ProxyConnectionFactory) GetAccessAPIClient(address string) (access.AccessAPIClient, io.Closer, error)

func (*ProxyConnectionFactory) GetExecutionAPIClient added in v0.21.0 

func (p *ProxyConnectionFactory) GetExecutionAPIClient(address string) (execution.ExecutionAPIClient, io.Closer, error)

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) Notify 

func (b *Retry) Notify(signal interface{}) 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)

func (*Retry) SetBackend 

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

Source Files

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