host

package
v0.2201.2 Latest Latest
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Published: Apr 5, 2022 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

Package host implements the functionality to provision and talk to runtimes.

Index

Constants

This section is empty.

Variables

View Source
var (
	// ErrInvalidArgument is the error returned when any of the passed method arguments is invalid.
	ErrInvalidArgument = fmt.Errorf("runtime: invalid argument")
	// ErrCheckTxFailed is the error returned when a transaction is rejected by the runtime.
	ErrCheckTxFailed = fmt.Errorf("runtime: check tx failed")
	// ErrInternal is the error returned when an unspecified internal error occurs.
	ErrInternal = fmt.Errorf("runtime: internal error")
)

Functions

This section is empty.

Types

type Config

type Config struct {
	// Bundle is the runtime bundle.
	Bundle *RuntimeBundle

	// Extra is an optional provisioner-specific configuration.
	Extra interface{}

	// MessageHandler is the message handler for the Runtime Host Protocol messages.
	MessageHandler protocol.Handler

	// LocalConfig is the node-local runtime configuration.
	LocalConfig map[string]interface{}
}

Config contains common configuration for the provisioned runtime.

type Event

type Event struct {
	Started       *StartedEvent
	FailedToStart *FailedToStartEvent
	Stopped       *StoppedEvent
	Updated       *UpdatedEvent
}

Event is a runtime host event.

type FailedToStartEvent

type FailedToStartEvent struct {
	// Error is the error that has occurred.
	Error error
}

FailedToStartEvent is a failed to start runtime event.

type Provisioner

type Provisioner interface {
	// NewRuntime provisions a new runtime.
	//
	// This method may return before the runtime is fully provisioned. The returned runtime will not
	// be started automatically, you must call Start explicitly.
	NewRuntime(ctx context.Context, cfg Config) (Runtime, error)
}

Provisioner is the runtime provisioner interface.

type RichRuntime added in v0.2100.0

type RichRuntime interface {
	Runtime

	// CheckTx requests the runtime to check a given transaction.
	CheckTx(
		ctx context.Context,
		rb *block.Block,
		lb *consensus.LightBlock,
		epoch beacon.EpochTime,
		maxMessages uint32,
		batch transaction.RawBatch,
	) ([]protocol.CheckTxResult, error)

	// Query requests the runtime to answer a runtime-specific query.
	Query(
		ctx context.Context,
		rb *block.Block,
		lb *consensus.LightBlock,
		epoch beacon.EpochTime,
		maxMessages uint32,
		method string,
		args []byte,
	) ([]byte, error)

	// QueryBatchLimits requests the runtime to answer the batch limits query.
	QueryBatchLimits(
		ctx context.Context,
		rb *block.Block,
		lb *consensus.LightBlock,
		epoch beacon.EpochTime,
	) (map[transaction.Weight]uint64, error)
}

RichRuntime provides higher-level functions for talking with a runtime.

func NewRichRuntime added in v0.2100.0

func NewRichRuntime(rt Runtime) RichRuntime

NewRichRuntime creates a new higher-level wrapper for a given runtime. It provides additional convenience functions for talking with a runtime.

type Runtime

type Runtime interface {
	// ID is the runtime identifier.
	ID() common.Namespace

	// GetInfo retrieves the runtime information.
	GetInfo(ctx context.Context) (*protocol.RuntimeInfoResponse, error)

	// Call sends a request message to the runtime over the Runtime Host Protocol and waits for the
	// response (which may be a failure).
	Call(ctx context.Context, body *protocol.Body) (*protocol.Body, error)

	// WatchEvents subscribes to runtime status events.
	WatchEvents(ctx context.Context) (<-chan *Event, pubsub.ClosableSubscription, error)

	// Start attempts to start the runtime.
	Start() error

	// Abort attempts to abort a runtime so that it will be ready to service new requests.
	// In case abort fails or force flag is set, the runtime will be restarted.
	Abort(ctx context.Context, force bool) error

	// Stop signals the provisioned runtime to stop.
	Stop()
}

Runtime is a provisioned runtime interface.

type RuntimeBundle added in v0.2200.0

type RuntimeBundle struct {
	*bundle.Bundle

	// Exeuctable is the path to the extracted ELF or TEE executable.
	Path string
}

RuntimeBundle is a exploded runtime bundle ready for execution.

type RuntimeEventEmitter

type RuntimeEventEmitter interface {
	// EmitEvent allows the caller to emit a runtime event.
	EmitEvent(ev *Event)
}

RuntimeEventEmitter is the interface for emitting events for a provisioned runtime.

type StartedEvent

type StartedEvent struct {
	// Version is the runtime version.
	Version version.Version

	// CapabilityTEE is the newly started runtime's CapabilityTEE. It may be nil in case the runtime
	// is not running inside a TEE.
	CapabilityTEE *node.CapabilityTEE
}

StartedEvent is a runtime started event.

type StoppedEvent

type StoppedEvent struct{}

StoppedEvent is a runtime stopped event.

type UpdatedEvent

type UpdatedEvent struct {
	// Version is the runtime version.
	Version version.Version

	// CapabilityTEE is the updated runtime's CapabilityTEE. It may be nil in case the runtime is
	// not running inside a TEE.
	CapabilityTEE *node.CapabilityTEE
}

UpdatedEvent is a runtime metadata updated event.

Directories

Path Synopsis
Package mock implements a mock runtime host useful for tests.
Package mock implements a mock runtime host useful for tests.
Package multi implements support for a runtime host aggregator that handles multiplexing multiple instances of other runtime hosts, to enable seamless transitions between versions.
Package multi implements support for a runtime host aggregator that handles multiplexing multiple instances of other runtime hosts, to enable seamless transitions between versions.
Package protocol implements the Runtime Host Protocol.
Package protocol implements the Runtime Host Protocol.
Package sandbox implements the runtime provisioner for runtimes in sandboxed processes.
Package sandbox implements the runtime provisioner for runtimes in sandboxed processes.
process
Package process implements a process sandboxing mechanism.
Package process implements a process sandboxing mechanism.
Package sgx implements the runtime provisioner for runtimes in Intel SGX enclaves.
Package sgx implements the runtime provisioner for runtimes in Intel SGX enclaves.
Package tests contains common tests for runtime host implementations.
Package tests contains common tests for runtime host implementations.

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