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scripteq: simple helper for comparing scripts.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2016-05-02 15:59:56 +09:30
parent 03a538ca02
commit 7efc0efab1
3 changed files with 17 additions and 3 deletions
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10
bitcoin/script.c
View File

@ -476,3 +476,13 @@ u8 **bitcoin_witness_secret(const tal_t *ctx,
return witness;
}
bool scripteq(const u8 *s1, size_t s1len, const u8 *s2, size_t s2len)
{
memcheck(s1, s1len);
memcheck(s2, s2len);
if (s1len != s2len)
return false;
return memcmp(s1, s2, s1len) == 0;
}

3
bitcoin/script.h
View File

@ -89,4 +89,7 @@ u8 **bitcoin_witness_secret(const tal_t *ctx,
/* Is this a pay to script hash? */
bool is_p2sh(const u8 *script, size_t script_len);
/* Are these two scripts equal? */
bool scripteq(const u8 *s1, size_t s1len, const u8 *s2, size_t s2len);
#endif /* LIGHTNING_BITCOIN_SCRIPT_H */

7
find_p2sh_out.c
View File

@ -10,9 +10,10 @@ static u32 find_output(const struct bitcoin_tx *tx, const u8 *scriptpubkey)
u32 i;
for (i = 0; i < tx->output_count; i++) {
if (tx->output[i].script_length != tal_count(scriptpubkey))
continue;
if (memcmp(tx->output[i].script, scriptpubkey, tal_count(scriptpubkey)) == 0)
if (scripteq(tx->output[i].script,
tx->output[i].script_length,
scriptpubkey,
tal_count(scriptpubkey)))
break;
}
/* FIXME: Return failure! */