72 lines
2.3 KiB
Go
72 lines
2.3 KiB
Go
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// +build chainrpc
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package chainrpc
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import (
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"fmt"
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"github.com/lightningnetwork/lnd/lnrpc"
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)
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// createNewSubServer is a helper method that will create the new chain notifier
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// sub server given the main config dispatcher method. If we're unable to find
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// the config that is meant for us in the config dispatcher, then we'll exit
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// with an error.
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func createNewSubServer(configRegistry lnrpc.SubServerConfigDispatcher) (
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lnrpc.SubServer, lnrpc.MacaroonPerms, error) {
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// We'll attempt to look up the config that we expect, according to our
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// subServerName name. If we can't find this, then we'll exit with an
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// error, as we're unable to properly initialize ourselves without this
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// config.
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chainNotifierServerConf, ok := configRegistry.FetchConfig(subServerName)
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if !ok {
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return nil, nil, fmt.Errorf("unable to find config for "+
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"subserver type %s", subServerName)
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}
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// Now that we've found an object mapping to our service name, we'll
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// ensure that it's the type we need.
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config, ok := chainNotifierServerConf.(*Config)
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if !ok {
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return nil, nil, fmt.Errorf("wrong type of config for "+
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"subserver %s, expected %T got %T", subServerName,
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&Config{}, chainNotifierServerConf)
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}
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// Before we try to make the new chain notifier service instance, we'll
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// perform some sanity checks on the arguments to ensure that they're
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// usable.
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switch {
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// If the macaroon service is set (we should use macaroons), then
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// ensure that we know where to look for them, or create them if not
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// found.
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case config.MacService != nil && config.NetworkDir == "":
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return nil, nil, fmt.Errorf("NetworkDir must be set to create " +
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"chainrpc")
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case config.ChainNotifier == nil:
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return nil, nil, fmt.Errorf("ChainNotifier must be set to " +
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"create chainrpc")
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}
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return New(config)
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}
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func init() {
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subServer := &lnrpc.SubServerDriver{
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SubServerName: subServerName,
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New: func(c lnrpc.SubServerConfigDispatcher) (
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lnrpc.SubServer, lnrpc.MacaroonPerms, error) {
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return createNewSubServer(c)
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},
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}
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// If the build tag is active, then we'll register ourselves as a
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// sub-RPC server within the global lnrpc package namespace.
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if err := lnrpc.RegisterSubServer(subServer); err != nil {
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panic(fmt.Sprintf("failed to register subserver driver %s: %v",
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subServerName, err))
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}
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}
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