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common/shutdown_scriptpubkey: extract shutdown scriptpubkey test.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2021-02-19 14:52:01 +10:30
parent ebb1b19c65
commit 66dda32da2
5 changed files with 35 additions and 15 deletions
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17
lightningd/channel_control.c
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@@ -12,6 +12,7 @@
#include <common/memleak.h>
#include <common/per_peer_state.h>
#include <common/psbt_open.h>
#include <common/shutdown_scriptpubkey.h>
#include <common/timeout.h>
#include <common/tx_roles.h>
#include <common/utils.h>
@@ -237,21 +238,7 @@ static void peer_got_shutdown(struct channel *channel, const u8 *msg)
tal_free(channel->shutdown_scriptpubkey[REMOTE]);
channel->shutdown_scriptpubkey[REMOTE] = scriptpubkey;
/* BOLT #2:
*
* 1. `OP_DUP` `OP_HASH160` `20` 20-bytes `OP_EQUALVERIFY` `OP_CHECKSIG`
* (pay to pubkey hash), OR
* 2. `OP_HASH160` `20` 20-bytes `OP_EQUAL` (pay to script hash), OR
* 3. `OP_0` `20` 20-bytes (version 0 pay to witness pubkey), OR
* 4. `OP_0` `32` 32-bytes (version 0 pay to witness script hash)
*
* A receiving node:
*...
* - if the `scriptpubkey` is not in one of the above forms:
* - SHOULD fail the connection.
*/
if (!is_p2pkh(scriptpubkey, NULL) && !is_p2sh(scriptpubkey, NULL)
&& !is_p2wpkh(scriptpubkey, NULL) && !is_p2wsh(scriptpubkey, NULL)) {
if (!valid_shutdown_scriptpubkey(scriptpubkey)) {
channel_fail_permanent(channel,
REASON_PROTOCOL,
"Bad shutdown scriptpubkey %s",