Add APIError::IncompatibleShutdownScript

[rust-lightning] / lightning / src / util / errors.rs

diff --git a/lightning/src/util/errors.rs b/lightning/src/util/errors.rs
index 7119c3a023a17d39dd1f657bad2e35f80477bc75..94ad965667873aa0b8f66d2e06427a491547e611 100644 (file)
--- a/lightning/src/util/errors.rs
+++ b/lightning/src/util/errors.rs
@@ -1,9 +1,22 @@
+// This file is Copyright its original authors, visible in version control
+// history.
+//
+// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
+// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// You may not use this file except in accordance with one or both of these
+// licenses.
+
 //! Error types live here.
 
-use std::fmt;
+use ln::script::ShutdownScript;
+
+use alloc::string::String;
+use core::fmt;
 
 /// Indicates an error on the client's part (usually some variant of attempting to use too-low or
 /// too-high values)
+#[derive(Clone)]
 pub enum APIError {
        /// Indicates the API was wholly misused (see err for more). Cases where these can be returned
        /// are documented, but generally indicates some precondition of a function was violated.
@@ -33,9 +46,21 @@ pub enum APIError {
                /// A human-readable error message
                err: String
        },
-       /// An attempt to call add/update_monitor returned an Err (ie you did this!), causing the
+       /// An attempt to call watch/update_channel returned an Err (ie you did this!), causing the
        /// attempted action to fail.
        MonitorUpdateFailed,
+       /// [`KeysInterface::get_shutdown_scriptpubkey`] returned a shutdown scriptpubkey incompatible
+       /// with the channel counterparty as negotiated in [`InitFeatures`].
+       ///
+       /// Using a SegWit v0 script should resolve this issue. If you cannot, you won't be able to open
+       /// a channel or cooperatively close one with this peer (and will have to force-close instead).
+       ///
+       /// [`KeysInterface::get_shutdown_scriptpubkey`]: crate::chain::keysinterface::KeysInterface::get_shutdown_scriptpubkey
+       /// [`InitFeatures`]: crate::ln::features::InitFeatures
+       IncompatibleShutdownScript {
+               /// The incompatible shutdown script.
+               script: ShutdownScript,
+       },
 }
 
 impl fmt::Debug for APIError {
@@ -46,6 +71,9 @@ impl fmt::Debug for APIError {
                        APIError::RouteError {ref err} => f.write_str(err),
                        APIError::ChannelUnavailable {ref err} => f.write_str(err),
                        APIError::MonitorUpdateFailed => f.write_str("Client indicated a channel monitor update failed"),
+                       APIError::IncompatibleShutdownScript { ref script } => {
+                               write!(f, "Provided a scriptpubkey format not accepted by peer: {}", script)
+                       },
                }
        }
 }