client

package
v0.12.1 Latest Latest
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 Go to latest Published: Nov 28, 2017 License: Apache-2.0 Imports: 13 Imported by: 0

Documentation

Overview

package client provides a general purpose interface (Client) for connecting to a tendermint node, as well as higher-level functionality.

The main implementation for production code is client.HTTP, which connects via http to the jsonrpc interface of the tendermint node.

For connecting to a node running in the same process (eg. when compiling the abci app in the same process), you can use the client.Local implementation.

For mocking out server responses during testing to see behavior for arbitrary return values, use the mock package.

In addition to the Client interface, which should be used externally for maximum flexibility and testability, and two implementations, this package also provides helper functions that work on any Client implementation.

Index

Constants

This section is empty.

Variables

View Source 
var DefaultABCIQueryOptions = ABCIQueryOptions{Height: 0, Trusted: false}

DefaultABCIQueryOptions are latest height (0) and trusted equal to false (which will result in a proof being returned).

Functions

func DefaultWaitStrategy 

func DefaultWaitStrategy(delta int) (abort error)

DefaultWaitStrategy is the standard backoff algorithm, but you can plug in another one

func WaitForHeight 

func WaitForHeight(c StatusClient, h int, waiter Waiter) error

Wait for height will poll status at reasonable intervals until the block at the given height is available.

If waiter is nil, we use DefaultWaitStrategy, but you can also provide your own implementation

func WaitForOneEvent 

func WaitForOneEvent(evsw types.EventSwitch,
	evtTyp string, timeout time.Duration) (types.TMEventData, error)

WaitForOneEvent subscribes to a websocket event for the given event time and returns upon receiving it one time, or when the timeout duration has expired.

This handles subscribing and unsubscribing under the hood

Types

type ABCIClient 

type ABCIClient interface {
	// reading from abci app
	ABCIInfo() (*ctypes.ResultABCIInfo, error)
	ABCIQuery(path string, data data.Bytes) (*ctypes.ResultABCIQuery, error)
	ABCIQueryWithOptions(path string, data data.Bytes, opts ABCIQueryOptions) (*ctypes.ResultABCIQuery, error)

	// writing to abci app
	BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error)
	BroadcastTxAsync(tx types.Tx) (*ctypes.ResultBroadcastTx, error)
	BroadcastTxSync(tx types.Tx) (*ctypes.ResultBroadcastTx, error)
}

ABCIClient groups together the functionality that principally affects the ABCI app. In many cases this will be all we want, so we can accept an interface which is easier to mock

type ABCIQueryOptions added in v0.12.0 

type ABCIQueryOptions struct {
	Height  uint64
	Trusted bool
}

ABCIQueryOptions can be used to provide options for ABCIQuery call other than the DefaultABCIQueryOptions.

type Client 

type Client interface {
	ABCIClient
	SignClient
	HistoryClient
	StatusClient

	// this Client is reactive, you can subscribe to any TMEventData
	// type, given the proper string. see tendermint/types/events.go
	types.EventSwitch
}

Client wraps most important rpc calls a client would make if you want to listen for events, test if it also implements events.EventSwitch

type HTTP 

type HTTP struct {
	*WSEvents
	// contains filtered or unexported fields
}

HTTP is a Client implementation that communicates with a tendermint node over json rpc and websockets.

This is the main implementation you probably want to use in production code. There are other implementations when calling the tendermint node in-process (local), or when you want to mock out the server for test code (mock).

func NewHTTP 

func NewHTTP(remote, wsEndpoint string) *HTTP

New takes a remote endpoint in the form tcp://<host>:<port> and the websocket path (which always seems to be "/websocket")

func (*HTTP) ABCIInfo 

func (c *HTTP) ABCIInfo() (*ctypes.ResultABCIInfo, error)

func (*HTTP) ABCIQuery 

func (c *HTTP) ABCIQuery(path string, data data.Bytes) (*ctypes.ResultABCIQuery, error)

func (*HTTP) ABCIQueryWithOptions added in v0.12.0 

func (c *HTTP) ABCIQueryWithOptions(path string, data data.Bytes, opts ABCIQueryOptions) (*ctypes.ResultABCIQuery, error)

func (*HTTP) Block 

func (c *HTTP) Block(height *int) (*ctypes.ResultBlock, error)

func (*HTTP) BlockchainInfo 

func (c *HTTP) BlockchainInfo(minHeight, maxHeight int) (*ctypes.ResultBlockchainInfo, error)

func (*HTTP) BroadcastTxAsync 

func (c *HTTP) BroadcastTxAsync(tx types.Tx) (*ctypes.ResultBroadcastTx, error)

func (*HTTP) BroadcastTxCommit 

func (c *HTTP) BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error)

func (*HTTP) BroadcastTxSync 

func (c *HTTP) BroadcastTxSync(tx types.Tx) (*ctypes.ResultBroadcastTx, error)

func (*HTTP) Commit 

func (c *HTTP) Commit(height *int) (*ctypes.ResultCommit, error)

func (*HTTP) DumpConsensusState 

func (c *HTTP) DumpConsensusState() (*ctypes.ResultDumpConsensusState, error)

func (*HTTP) Genesis 

func (c *HTTP) Genesis() (*ctypes.ResultGenesis, error)

func (*HTTP) NetInfo 

func (c *HTTP) NetInfo() (*ctypes.ResultNetInfo, error)

func (*HTTP) Status 

func (c *HTTP) Status() (*ctypes.ResultStatus, error)

func (*HTTP) Tx added in v0.9.1 

func (c *HTTP) Tx(hash []byte, prove bool) (*ctypes.ResultTx, error)

func (*HTTP) Validators 

func (c *HTTP) Validators(height *int) (*ctypes.ResultValidators, error)

type HistoryClient 

type HistoryClient interface {
	Genesis() (*ctypes.ResultGenesis, error)
	BlockchainInfo(minHeight, maxHeight int) (*ctypes.ResultBlockchainInfo, error)
}

HistoryClient shows us data from genesis to now in large chunks.

type Local 

type Local struct {
	types.EventSwitch
	// contains filtered or unexported fields
}

Local is a Client implementation that directly executes the rpc functions on a given node, without going through HTTP or GRPC

This implementation is useful for:

* Running tests against a node in-process without the overhead of going through an http server * Communication between an ABCI app and tendermin core when they are compiled in process.

For real clients, you probably want to use client.HTTP. For more powerful control during testing, you probably want the "client/mock" package.

func NewLocal 

func NewLocal(node *nm.Node) Local

NewLocal configures a client that calls the Node directly.

Note that given how rpc/core works with package singletons, that you can only have one node per process. So make sure test cases don't run in parallel, or try to simulate an entire network in one process...

func (Local) ABCIInfo 

func (c Local) ABCIInfo() (*ctypes.ResultABCIInfo, error)

func (Local) ABCIQuery 

func (c Local) ABCIQuery(path string, data data.Bytes) (*ctypes.ResultABCIQuery, error)

func (Local) ABCIQueryWithOptions added in v0.12.0 

func (c Local) ABCIQueryWithOptions(path string, data data.Bytes, opts ABCIQueryOptions) (*ctypes.ResultABCIQuery, error)

func (Local) Block 

func (c Local) Block(height *int) (*ctypes.ResultBlock, error)

func (Local) BlockchainInfo 

func (c Local) BlockchainInfo(minHeight, maxHeight int) (*ctypes.ResultBlockchainInfo, error)

func (Local) BroadcastTxAsync 

func (c Local) BroadcastTxAsync(tx types.Tx) (*ctypes.ResultBroadcastTx, error)

func (Local) BroadcastTxCommit 

func (c Local) BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error)

func (Local) BroadcastTxSync 

func (c Local) BroadcastTxSync(tx types.Tx) (*ctypes.ResultBroadcastTx, error)

func (Local) Commit 

func (c Local) Commit(height *int) (*ctypes.ResultCommit, error)

func (Local) DialSeeds 

func (c Local) DialSeeds(seeds []string) (*ctypes.ResultDialSeeds, error)

func (Local) DumpConsensusState 

func (c Local) DumpConsensusState() (*ctypes.ResultDumpConsensusState, error)

func (Local) Genesis 

func (c Local) Genesis() (*ctypes.ResultGenesis, error)

func (Local) NetInfo 

func (c Local) NetInfo() (*ctypes.ResultNetInfo, error)

func (Local) Status 

func (c Local) Status() (*ctypes.ResultStatus, error)

func (Local) Tx added in v0.9.1 

func (c Local) Tx(hash []byte, prove bool) (*ctypes.ResultTx, error)

func (Local) Validators 

func (c Local) Validators(height *int) (*ctypes.ResultValidators, error)

type NetworkClient 

type NetworkClient interface {
	NetInfo() (*ctypes.ResultNetInfo, error)
	DumpConsensusState() (*ctypes.ResultDumpConsensusState, error)
}

NetworkClient is general info about the network state. May not be needed usually.

Not included in the Client interface, but generally implemented by concrete implementations.

type SignClient 

type SignClient interface {
	Block(height *int) (*ctypes.ResultBlock, error)
	Commit(height *int) (*ctypes.ResultCommit, error)
	Validators(height *int) (*ctypes.ResultValidators, error)
	Tx(hash []byte, prove bool) (*ctypes.ResultTx, error)
}

SignClient groups together the interfaces need to get valid signatures and prove anything about the chain

type StatusClient 

type StatusClient interface {
	// general chain info
	Status() (*ctypes.ResultStatus, error)
}

type WSEvents 

type WSEvents struct {
	types.EventSwitch
	// contains filtered or unexported fields
}

func (*WSEvents) AddListenerForEvent 

func (w *WSEvents) AddListenerForEvent(listenerID, event string, cb events.EventCallback)

* TODO: more intelligent subscriptions! *

func (*WSEvents) RemoveListener 

func (w *WSEvents) RemoveListener(listenerID string)

func (*WSEvents) RemoveListenerForEvent 

func (w *WSEvents) RemoveListenerForEvent(event string, listenerID string)

func (*WSEvents) Start 

func (w *WSEvents) Start() (bool, error)

Start is the only way I could think the extend OnStart from events.eventSwitch. If only it wasn't private... BaseService.Start -> eventSwitch.OnStart -> WSEvents.Start

func (*WSEvents) Stop 

func (w *WSEvents) Stop() bool

Stop wraps the BaseService/eventSwitch actions as Start does

type Waiter 

type Waiter func(delta int) (abort error)

Waiter is informed of current height, decided whether to quit early

Source Files

View all Source files

Directories

Path Synopsis
package mock returns a Client implementation that accepts various (mock) implementations of the various methods.
 package mock returns a Client implementation that accepts various (mock) implementations of the various methods.

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