145 lines
3.2 KiB
Go
145 lines
3.2 KiB
Go
package client
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import (
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"context"
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"crypto/ecdsa"
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"time"
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"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/rpc/client"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/wallet"
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crypto "github.com/nspcc-dev/neofs-crypto"
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"github.com/nspcc-dev/neofs-node/pkg/util/logger"
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"go.uber.org/zap"
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)
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// Option is a client configuration change function.
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type Option func(*cfg)
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// groups the configurations with default values.
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type cfg struct {
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ctx context.Context // neo-go client context
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dialTimeout time.Duration // client dial timeout
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logger *logger.Logger // logging component
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gas util.Uint160 // native gas script-hash
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}
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const defaultDialTimeout = 5 * time.Second
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func defaultConfig() *cfg {
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return &cfg{
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ctx: context.Background(),
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dialTimeout: defaultDialTimeout,
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logger: zap.L(),
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}
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}
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// New creates, initializes and returns the Client instance.
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//
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// If private key is nil, crypto.ErrEmptyPrivateKey is returned.
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//
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// Other values are set according to provided options, or by default:
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// * client context: Background;
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// * dial timeout: 5s;
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// * blockchain network type: netmode.PrivNet;
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// * logger: zap.L().
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//
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// If desired option satisfies the default value, it can be omitted.
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// If multiple options of the same config value are supplied,
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// the option with the highest index in the arguments will be used.
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func New(key *ecdsa.PrivateKey, endpoint string, opts ...Option) (*Client, error) {
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if key == nil {
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return nil, crypto.ErrEmptyPrivateKey
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}
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privKeyBytes := crypto.MarshalPrivateKey(key)
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wif, err := keys.WIFEncode(privKeyBytes, keys.WIFVersion, true)
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if err != nil {
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return nil, err
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}
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account, err := wallet.NewAccountFromWIF(wif)
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if err != nil {
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return nil, err
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}
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// build default configuration
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cfg := defaultConfig()
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// apply options
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for _, opt := range opts {
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opt(cfg)
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}
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cli, err := client.New(cfg.ctx, endpoint, client.Options{
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DialTimeout: cfg.dialTimeout,
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})
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if err != nil {
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return nil, err
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}
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err = cli.Init() // magic number is set there based on RPC node answer
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if err != nil {
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return nil, err
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}
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gas, err := cli.GetNativeContractHash(nativenames.Gas)
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if err != nil {
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return nil, err
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}
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return &Client{
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logger: cfg.logger,
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client: cli,
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acc: account,
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gas: gas,
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}, nil
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}
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// WithContext returns a client constructor option that
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// specifies the neo-go client context.
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//
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// Ignores nil value.
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//
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// If option not provided, context.Background() is used.
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func WithContext(ctx context.Context) Option {
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return func(c *cfg) {
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if ctx != nil {
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c.ctx = ctx
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}
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}
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}
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// WithDialTimeout returns a client constructor option
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// that specifies neo-go client dial timeout duration.
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//
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// Ignores non-positive value.
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//
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// If option not provided, 5s timeout is used.
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func WithDialTimeout(dur time.Duration) Option {
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return func(c *cfg) {
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if dur > 0 {
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c.dialTimeout = dur
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}
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}
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}
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// WithLogger returns a client constructor option
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// that specifies the component for writing log messages.
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//
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// Ignores nil value.
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//
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// If option not provided, zap.L() is used.
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func WithLogger(logger *logger.Logger) Option {
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return func(c *cfg) {
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if logger != nil {
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c.logger = logger
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}
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}
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}
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