wire: derive_channel_id should accept const struct *bitcoin_txid

It's not modifying anything in the txid itself, just mashing it up with the txout index. Signed-off-by: Christian Decker <[email protected]>
owldock · Feb 20, 2019 · bccb8db · bccb8db
1 parent ca3db29
commit bccb8db
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/wire/fromwire.c b/wire/fromwire.c
@@ -253,7 +253,7 @@ REGISTER_TYPE_TO_HEXSTR(channel_id);
  * (i.e. `funding_output_index` alters the last 2 bytes).
  */
 void derive_channel_id(struct channel_id *channel_id,
-		       struct bitcoin_txid *txid, u16 txout)
+		       const struct bitcoin_txid *txid, u16 txout)
 {
 	BUILD_ASSERT(sizeof(*channel_id) == sizeof(*txid));
 	memcpy(channel_id, txid, sizeof(*channel_id));

diff --git a/wire/wire.h b/wire/wire.h
@@ -30,7 +30,7 @@ struct siphash_seed;
 typedef char wirestring;
 
 void derive_channel_id(struct channel_id *channel_id,
-		       struct bitcoin_txid *txid, u16 txout);
+		       const struct bitcoin_txid *txid, u16 txout);
 
 /* Read the type; returns -1 if not long enough.  cursor is a tal ptr. */
 int fromwire_peektype(const u8 *cursor);