graph

Documentation

Index

• Constants
• type AsyncProvider
  • func NewAsyncProvider(graph map[provider.Pair]nodes.Node, feed *feed.Feed, logger log.Logger) (*AsyncProvider, error)
  • func (a *AsyncProvider) Start(ctx context.Context) error
  • func (a *AsyncProvider) Wait() <-chan error
• type ErrPairNotFound
  • func (e ErrPairNotFound) Error() string
• type Graphs
• type Provider
  • func NewProvider(graph Graphs, feed *feed.Feed) *Provider
  • func (g *Provider) Models(pairs ...provider.Pair) (map[provider.Pair]*provider.Model, error)
  • func (g *Provider) Pairs() ([]provider.Pair, error)
  • func (g *Provider) Price(pair provider.Pair) (*provider.Price, error)
  • func (g *Provider) Prices(pairs ...provider.Pair) (map[provider.Pair]*provider.Price, error)

Constants

const LoggerTag = "ASYNC_GOFER"

Types

type AsyncProvider

type AsyncProvider struct {
	*Provider
	// contains filtered or unexported fields
}

AsyncProvider implements the provider.Provider interface. It works just like Graph but allows updating prices asynchronously.

func NewAsyncProvider

func NewAsyncProvider(
	graph map[provider.Pair]nodes.Node,
	feed *feed.Feed,
	logger log.Logger,
) (*AsyncProvider, error)

NewAsyncProvider returns a new AsyncGofer instance.

func (*AsyncProvider) Start

func (a *AsyncProvider) Start(ctx context.Context) error

Start starts asynchronous price updater.

func (*AsyncProvider) Wait

func (a *AsyncProvider) Wait() <-chan error

Wait waits until the context is canceled or until an error occurs.

type ErrPairNotFound

type ErrPairNotFound struct {
	Pair provider.Pair
}

func (ErrPairNotFound) Error

func (e ErrPairNotFound) Error() string

type Graphs

type Graphs map[provider.Pair]nodes.Node

type Provider

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

Provider implements the provider.Provider interface. It uses a graph structure to calculate pairs prices.

func NewProvider

func NewProvider(graph Graphs, feed *feed.Feed) *Provider

NewProvider returns a new Provider instance. If the GetByFeed is not nil, then prices are automatically updated when the Price or Prices methods are called. Otherwise, prices have to be updated externally.

func (*Provider) Models

func (g *Provider) Models(pairs ...provider.Pair) (map[provider.Pair]*provider.Model, error)

Models implements the provider.Provider interface.

func (*Provider) Pairs

func (g *Provider) Pairs() ([]provider.Pair, error)

Pairs implements the provider.Provider interface.

func (*Provider) Price

func (g *Provider) Price(pair provider.Pair) (*provider.Price, error)

Price implements the provider.Provider interface.

func (*Provider) Prices

func (g *Provider) Prices(pairs ...provider.Pair) (map[provider.Pair]*provider.Price, error)

Prices implements the provider.Provider interface.