package neofscontract import ( "github.com/nspcc-dev/neofs-node/pkg/morph/client" ) // Client is a wrapper over StaticClient // which makes calls with the names and arguments // of the NeoFS contract. // // Working client must be created via constructor New. // Using the Client that has been created with new(Client) // expression (or just declaring a Client variable) is unsafe // and can lead to panic. type Client struct { client *client.StaticClient // static NeoFS contract client *cfg // contract method names } // Option is a client configuration change function. type Option func(*cfg) type cfg struct { bindKeysMethod, unbindKeysMethod string } func defaultConfig() *cfg { const ( defaultBindKeysMethod = "bind" defaultUnbindKeysMethod = "unbind" ) return &cfg{ bindKeysMethod: defaultBindKeysMethod, unbindKeysMethod: defaultUnbindKeysMethod, } } // New creates, initializes and returns the Client instance. // // If StaticClient is nil, panic occurs. // // Other values are set according to provided options, or by default: // * key binding method name: bind; // * key unbinding method name: unbind; // // If desired option satisfies the default value, it can be omitted. // If multiple options of the same config value are supplied, // the option with the highest index in the arguments will be used. func New(c *client.StaticClient, opts ...Option) *Client { if c == nil { panic("static client is nil") } res := &Client{ client: c, cfg: defaultConfig(), // build default configuration } // apply options for _, opt := range opts { opt(res.cfg) } return res } // WithBindKeysMethod returns a client constructor option that // specifies the method name of key binding operation. // // Ignores empty value. func WithBindKeysMethod(n string) Option { return func(c *cfg) { if n != "" { c.bindKeysMethod = n } } } // WithUnbindKeysMethod returns a client constructor option that // specifies the method name of key unbinding operation. // // Ignores empty value. func WithUnbindKeysMethod(n string) Option { return func(c *cfg) { if n != "" { c.unbindKeysMethod = n } } }