Document Channel::get_funding_redeemscript precondition

diff --git a/src/ln/channel.rs b/src/ln/channel.rs
index ab8b3bcdf6cb0ca0bd8251ff8f474f939758df68..d620ff4f8b57b7f33b1490d2d7931dc777dec1b3 100644 (file)
--- a/src/ln/channel.rs
+++ b/src/ln/channel.rs
@@ -893,10 +893,11 @@ impl Channel {
 
        /// Gets the redeemscript for the funding transaction output (ie the funding transaction output
        /// pays to get_funding_redeemscript().to_v0_p2wsh()).
+       /// Panics if called before accept_channel/new_from_req
        pub fn get_funding_redeemscript(&self) -> Script {
                let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2);
                let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).serialize();
-               let their_funding_key = self.their_funding_pubkey.unwrap().serialize();
+               let their_funding_key = self.their_funding_pubkey.expect("get_funding_redeemscript only allowed after accept_channel").serialize();
                if our_funding_key[..] < their_funding_key[..] {
                        builder.push_slice(&our_funding_key)
                                .push_slice(&their_funding_key)