lambda

type ClientClient struct {
	InstallationID string `json:"installation_id"`
	AppTitle       string `json:"app_title"`
	AppVersionName string `json:"app_version_name"`
	AppVersionCode string `json:"app_version_code"`
	AppPackageName string `json:"app_package_name"`
}

type ClientContext struct {
	Client ClientClient      `json:"client"`
	Custom map[string]string `json:"custom"`
	Env    map[string]string `json:"env"`
}

type Context struct {
	RequestID string         `json:"aws_request_id"`
	Client    *ClientContext `json:"client_context"`
	Identity  *Identity      `json:"identity"`
	ARN       string         `json:"invoked_function_arn"`
}

type Identity struct {
	ID     string `json:"cognito_identity_id"`
	PoolID string `json:"cognito_identity_pool_id"`
}

type InvokeReply struct {
	Result    json.RawMessage `json:"result"`
	ErrorType string          `json:"errortype"`
	InvokeID  string          `json:"invokeid"`
	Errors    bool            `json:"errors,omitempty"`
	Billing   ReqeustBilling  `json:"billing"`
}

type InvokeRequest struct {
	Context  Context     `json:"context"`
	Event    interface{} `json:"event"`
	Deadline int64       `json:"deadline"` // number of milliseconds since January 1, 1970 UTC.
}

type Invoker interface {
	Invoke(event interface{}, context Context, deadline time.Time) (json.RawMessage, error)
}

type ProxyRequest struct {
	Context   Context           `json:"context"`
	Remaining int               `json:"remaining"` // remaining time in millis
	Env       map[string]string `json:"env"`
	Event     interface{}       `json:"event"`
}

type ReqeustBilling struct {
	Duraion float64 `json:"duration"` // millisecond
	Memory  string  `json:"memory"`   // memroy size (should we have it here?)
	Used    int     `json:"used"`     // memory used (MB)
}

type StartupRequest struct {
	Handler string            `json:"handler"`
	Env     map[string]string `json:"env"`
}

type StartupResponse struct {
	OK bool `json:"ok"`
}