lntest: surface bitcoin backend rpc credentials

[skip ci]

lntest/bitcoind_common.go

@@ -64,6 +64,11 @@ func (b BitcoindBackendConfig) DisconnectMiner() error {
 	return b.rpcClient.AddNode(b.minerAddr, rpcclient.ANRemove)
 }
 
+// Credentials returns the rpc username, password and host for the backend.
+func (b BitcoindBackendConfig) Credentials() (string, string, string, error) {
+	return b.rpcUser, b.rpcPass, b.rpcHost, nil
+}
+
 // Name returns the name of the backend type.
 func (b BitcoindBackendConfig) Name() string {
 	return "bitcoind"

lntest/btcd.go

@@ -67,6 +67,11 @@ func (b BtcdBackendConfig) DisconnectMiner() error {
 	return b.harness.Client.Node(btcjson.NDisconnect, b.minerAddr, &temp)
 }
 
+// Credentials returns the rpc username, password and host for the backend.
+func (b BtcdBackendConfig) Credentials() (string, string, string, error) {
+	return b.rpcConfig.User, b.rpcConfig.Pass, b.rpcConfig.Host, nil
+}
+
 // Name returns the name of the backend type.
 func (b BtcdBackendConfig) Name() string {
 	return "btcd"

lntest/harness_node.go

@@ -82,6 +82,10 @@ type BackendConfig interface {
 
 	// Name returns the name of the backend type.
 	Name() string
+
+	// Credentials returns the rpc username, password and host for the
+	// backend.
+	Credentials() (string, string, string, error)
 }
 
 // NodeConfig is the basic interface a node configuration must implement.

lntest/neutrino.go

@@ -42,6 +42,12 @@ func (b NeutrinoBackendConfig) DisconnectMiner() error {
 	return fmt.Errorf("unimplemented")
 }
 
+// Credentials returns the rpc username, password and host for the backend.
+// For neutrino, we return an error because there is no rpc client available.
+func (b NeutrinoBackendConfig) Credentials() (string, string, string, error) {
+	return "", "", "", fmt.Errorf("unimplemented")
+}
+
 // Name returns the name of the backend type.
 func (b NeutrinoBackendConfig) Name() string {
 	return NeutrinoBackendName