aljaz/lightning
1
0
Fork 0
mirror of https://github.com/aljazceru/lightning.git synced 2025-12-24 01:24:26 +01:00
Code Issues Packages Projects Releases Wiki Activity

psbt: add serialize to/from wire for psbts

Browse Source
This commit is contained in:
niftynei
2020-05-21 13:27:41 +09:30
committed by Rusty Russell
parent 5d0fc176e8
commit 559f88faa1
20 changed files with 168 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
bitcoin/psbt.c
View File

@@ -1,10 +1,10 @@
#include <assert.h>
#include <bitcoin/psbt.h>
#include <ccan/cast/cast.h>
#include <ccan/short_types/short_types.h>
#include <string.h>
#include <wally_psbt.h>
#include <wally_transaction.h>
#include <wire/wire.h>
#define MAKE_ROOM(arr, pos, num) \
memmove((arr) + (pos) + 1, (arr) + (pos), \
@@ -137,3 +137,56 @@ void psbt_rm_output(struct wally_psbt *psbt,
REMOVE_ELEM(psbt->outputs, remove_at, psbt->num_outputs);
psbt->num_outputs -= 1;
}
void towire_psbt(u8 **pptr, const struct wally_psbt *psbt)
{
/* Let's include the PSBT bytes */
for (size_t room = 1024; room < 1024 * 1000; room *= 2) {
u8 *pbt_bytes = tal_arr(NULL, u8, room);
size_t bytes_written;
if (wally_psbt_to_bytes(psbt, pbt_bytes, room, &bytes_written) == WALLY_OK) {
towire_u32(pptr, bytes_written);
towire_u8_array(pptr, pbt_bytes, bytes_written);
tal_free(pbt_bytes);
return;
}
tal_free(pbt_bytes);
}
/* PSBT is too big */
abort();
}
struct wally_psbt *fromwire_psbt(const tal_t *ctx,
const u8 **cursor, size_t *max)
{
struct wally_psbt *psbt;
u32 psbt_byte_len;
const u8 *psbt_buf;
psbt_byte_len = fromwire_u32(cursor, max);
psbt_buf = fromwire(cursor, max, NULL, psbt_byte_len);
if (!psbt_buf)
return NULL;
if (wally_psbt_from_bytes(psbt_buf, psbt_byte_len, &psbt) != WALLY_OK)
return fromwire_fail(cursor, max);
/* We promised it would be owned by ctx: libwally uses a dummy owner */
tal_steal(ctx, psbt);
tal_add_destructor(psbt, psbt_destroy);
#if DEVELOPER
/* Re-marshall for sanity check! */
u8 *tmpbuf = tal_arr(NULL, u8, psbt_byte_len);
size_t written;
if (wally_psbt_to_bytes(psbt, tmpbuf, psbt_byte_len, &written) != WALLY_OK) {
tal_free(tmpbuf);
tal_free(psbt);
return fromwire_fail(cursor, max);
}
tal_free(tmpbuf);
#endif
return psbt;
}