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