package wrapper import ( "errors" "fmt" "github.com/nspcc-dev/neo-go/pkg/encoding/fixedn" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/nspcc-dev/neofs-node/pkg/morph/client" "github.com/nspcc-dev/neofs-node/pkg/morph/client/balance" ) // Client represents the Balance contract client. // // It is a type alias of // github.com/nspcc-dev/neofs-node/pkg/morph/client/balance.Client. type Client = balance.Client // Wrapper is a wrapper over balance contract // client which implements: // * tool for obtaining the amount of funds in the client's account; // * tool for obtaining decimal precision of currency transactions. // // Working wrapper must be created via constructor New. // Using the Wrapper that has been created with new(Wrapper) // expression (or just declaring a Wrapper variable) is unsafe // and can lead to panic. type Wrapper struct { client *Client } // ErrNilWrapper is returned by functions that expect // a non-nil Wrapper pointer, but received nil. var ErrNilWrapper = errors.New("balance contract client wrapper is nil") // New creates, initializes and returns the Wrapper instance. // // If Client is nil, balance.ErrNilClient is returned. func New(c *Client) (*Wrapper, error) { if c == nil { return nil, balance.ErrNilClient } return &Wrapper{ client: c, }, nil } // NewFromMorph returns the wrapper instance from the raw morph client. func NewFromMorph(cli *client.Client, contract util.Uint160, fee fixedn.Fixed8) (*Wrapper, error) { staticClient, err := client.NewStatic(cli, contract, fee) if err != nil { return nil, fmt.Errorf("could not create static client of Balance contract: %w", err) } enhancedBalanceClient, err := balance.New(staticClient) if err != nil { return nil, fmt.Errorf("could not create Balance contract client: %w", err) } return New(enhancedBalanceClient) }