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bitcoin/script: BOLT 3 htlc transaction support.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2017-02-07 12:14:22 +10:30
parent f9189254e4
commit 3e1ae177fb
2 changed files with 42 additions and 1 deletions
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35
bitcoin/script.c
View File

@ -814,6 +814,41 @@ u8 **bitcoin_htlc_receive_spend_preimage(const tal_t *ctx,
return witness;
}
u8 *bitcoin_wscript_htlc_tx(const tal_t *ctx,
u16 to_self_delay,
const struct pubkey *revocation_pubkey,
const struct pubkey *local_delayedkey)
{
u8 *script = tal_arr(ctx, u8, 0);
/* BOLT #3:
*
* The witness script for the output is:
*
* OP_IF
* # Penalty transaction
* <revocation-pubkey>
* OP_ELSE
* `to-self-delay`
* OP_CSV
* OP_DROP
* <local-delayedkey>
* OP_ENDIF
* OP_CHECKSIG
*/
add_op(&script, OP_IF);
add_push_key(&script, revocation_pubkey);
add_op(&script, OP_ELSE);
add_number(&script, to_self_delay);
add_op(&script, OP_CHECKSEQUENCEVERIFY);
add_op(&script, OP_DROP);
add_push_key(&script, local_delayedkey);
add_op(&script, OP_ENDIF);
add_op(&script, OP_CHECKSIG);
return script;
}
bool scripteq(const tal_t *s1, const tal_t *s2)
{
memcheck(s1, tal_len(s1));

8
bitcoin/script.h
View File

@ -129,7 +129,13 @@ u8 **bitcoin_htlc_receive_spend_preimage(const tal_t *ctx,
const struct preimage *preimage,
const u8 *wscript);
/* Is this a pay to pubkeu hash? */
/* BOLT #3 HTLC-success/HTLC-timeout output */
u8 *bitcoin_wscript_htlc_tx(const tal_t *ctx,
u16 to_self_delay,
const struct pubkey *revocation_pubkey,
const struct pubkey *local_delayedkey);
/* Is this a pay to pubkey hash? */
bool is_p2pkh(const u8 *script);
/* Is this a pay to script hash? */