mirror of https://github.com/namecoin/ncdns
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56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
package namecoin
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import (
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"fmt"
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"github.com/namecoin/btcd/btcjson"
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"github.com/namecoin/btcd/rpcclient"
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"gopkg.in/hlandau/madns.v2/merr"
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"github.com/namecoin/ncrpcclient"
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)
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// Client represents an ncrpcclient.Client with an additional DNS-friendly
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// convenience wrapper around NameShow.
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type Client struct {
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*ncrpcclient.Client
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}
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func New(config *rpcclient.ConnConfig, ntfnHandlers *rpcclient.NotificationHandlers) (*Client, error) {
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ncClient, err := ncrpcclient.New(config, ntfnHandlers)
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if err != nil {
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return nil, err
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}
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return &Client{ncClient}, nil
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}
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// NameQuery returns the value of a name. If the name doesn't exist, the error
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// returned will be merr.ErrNoSuchDomain.
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func (c *Client) NameQuery(name string, streamIsolationID string) (string, error) {
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// TODO: Pass stream isolation ID to namecoind, and remove this error
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if streamIsolationID != "" {
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return "", fmt.Errorf("Stream isolation ID '%s' is not yet passed to namecoind", streamIsolationID)
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}
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nameData, err := c.NameShow(name)
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if err != nil {
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if jerr, ok := err.(*btcjson.RPCError); ok {
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if jerr.Code == btcjson.ErrRPCWallet {
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// ErrRPCWallet from name_show indicates that
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// the name does not exist.
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return "", merr.ErrNoSuchDomain
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}
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}
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// Some error besides NXDOMAIN happened; pass that error
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// through unaltered.
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return "", err
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}
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// TODO: check the "value_error" field for errors and report those to the caller.
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// We got the name data. Return the value.
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return nameData.Value, nil
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}
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