backend

Documentation

Index

• type Backend
  • func New(state protocol.State, executionRPC execproto.ExecutionAPIClient, ...) *Backend
  • func (b *Backend) DeriveTransactionStatus(tx *flow.TransactionBody, executed bool) (flow.TransactionStatus, error)
  • func (b *Backend) ExecuteScriptAtBlockHeight(ctx context.Context, blockHeight uint64, script []byte, arguments [][]byte) ([]byte, error)
  • func (b *Backend) ExecuteScriptAtBlockID(ctx context.Context, blockID flow.Identifier, script []byte, ...) ([]byte, error)
  • func (b *Backend) ExecuteScriptAtLatestBlock(ctx context.Context, script []byte, arguments [][]byte) ([]byte, error)
  • func (b *Backend) GetAccount(ctx context.Context, address flow.Address) (*flow.Account, error)
  • func (b *Backend) GetAccountAtBlockHeight(ctx context.Context, address flow.Address, height uint64) (*flow.Account, error)
  • func (b *Backend) GetAccountAtLatestBlock(ctx context.Context, address flow.Address) (*flow.Account, error)
  • func (b *Backend) GetBlockByHeight(_ context.Context, height uint64) (*flow.Block, error)
  • func (b *Backend) GetBlockByID(_ context.Context, id flow.Identifier) (*flow.Block, error)
  • func (b *Backend) GetBlockHeaderByHeight(_ context.Context, height uint64) (*flow.Header, error)
  • func (b *Backend) GetBlockHeaderByID(_ context.Context, id flow.Identifier) (*flow.Header, error)
  • func (b *Backend) GetCollectionByID(_ context.Context, colID flow.Identifier) (*flow.LightCollection, error)
  • func (b *Backend) GetEventsForBlockIDs(ctx context.Context, eventType string, blockIDs []flow.Identifier) ([]flow.BlockEvents, error)
  • func (b *Backend) GetEventsForHeightRange(ctx context.Context, eventType string, startHeight, endHeight uint64) ([]flow.BlockEvents, error)
  • func (b *Backend) GetLatestBlock(_ context.Context, isSealed bool) (*flow.Block, error)
  • func (b *Backend) GetLatestBlockHeader(_ context.Context, isSealed bool) (*flow.Header, error)
  • func (b *Backend) GetNetworkParameters(_ context.Context) access.NetworkParameters
  • func (b *Backend) GetTransaction(_ context.Context, txID flow.Identifier) (*flow.TransactionBody, error)
  • func (b *Backend) GetTransactionResult(ctx context.Context, txID flow.Identifier) (*access.TransactionResult, error)
  • func (b *Backend) NotifyFinalizedBlockHeight(height uint64)
  • func (b *Backend) Ping(ctx context.Context) error
  • func (b *Backend) SendRawTransaction(ctx context.Context, tx *flow.TransactionBody) error
  • func (b *Backend) SendTransaction(ctx context.Context, tx *flow.TransactionBody) error
• type ConnectionFactory
• type ConnectionFactoryImpl
  • func (cf *ConnectionFactoryImpl) GetAccessAPIClient(address string) (access.AccessAPIClient, io.Closer, error)
• type Retry
  • func (r *Retry) Activate() *Retry
  • func (r *Retry) IsActive() bool
  • func (b *Retry) Notify(signal interface{}) bool
  • func (r *Retry) RegisterTransaction(height uint64, tx *flow.TransactionBody)
  • func (r *Retry) Retry(height uint64)
  • func (r *Retry) SetBackend(b *Backend) *Retry

Types

type Backend

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

Backends 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,
	executionRPC execproto.ExecutionAPIClient,
	collectionRPC accessproto.AccessAPIClient,
	blocks storage.Blocks,
	headers storage.Headers,
	collections storage.Collections,
	transactions storage.Transactions,
	chainID flow.ChainID,
	transactionMetrics module.TransactionMetrics,
	collectionGRPCPort uint,
	connFactory ConnectionFactory,
	retryEnabled bool,
) *Backend

func (*Backend) DeriveTransactionStatus

func (b *Backend) DeriveTransactionStatus(
	tx *flow.TransactionBody,
	executed bool,
) (flow.TransactionStatus, error)

DeriveTransactionStatus derives the transaction status based on current protocol state

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) 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) GetNetworkParameters

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

func (*Backend) GetTransaction

func (b *Backend) GetTransaction(_ 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) 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 ConnectionFactory

type ConnectionFactory interface {
	GetAccessAPIClient(address string) (access.AccessAPIClient, io.Closer, error)
}

ConnectionFactory is used to create an access api client

type ConnectionFactoryImpl

type ConnectionFactoryImpl struct {
}

func (*ConnectionFactoryImpl) GetAccessAPIClient

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