mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
0fe53cc8e7
We used to have a permutation map; this reintroduces a variant which uses the htlc pointers directly. We need this because we have to send the htlc-tx signatures in output order as part of the protocol: without two-stage HTLCs we only needed to wire them up in the unilateral spend case so we simply brute-forced the ordering. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#include "bitcoin/script.h"
|
|
#include "bitcoin/tx.h"
|
|
#include "close_tx.h"
|
|
#include "permute_tx.h"
|
|
#include "protobuf_convert.h"
|
|
|
|
struct bitcoin_tx *create_close_tx(const tal_t *ctx,
|
|
const u8 *our_script,
|
|
const u8 *their_script,
|
|
const struct sha256_double *anchor_txid,
|
|
unsigned int anchor_index,
|
|
u64 anchor_satoshis,
|
|
uint64_t to_us, uint64_t to_them)
|
|
{
|
|
struct bitcoin_tx *tx;
|
|
|
|
/* Now create close tx: one input, two outputs. */
|
|
tx = bitcoin_tx(ctx, 1, 2);
|
|
|
|
/* Our input spends the anchor tx output. */
|
|
tx->input[0].txid = *anchor_txid;
|
|
tx->input[0].index = anchor_index;
|
|
tx->input[0].amount = tal_dup(tx->input, u64, &anchor_satoshis);
|
|
|
|
/* One output is to us. */
|
|
tx->output[0].amount = to_us;
|
|
tx->output[0].script = tal_dup_arr(tx, u8,
|
|
our_script, tal_count(our_script), 0);
|
|
|
|
/* Other output is to them. */
|
|
tx->output[1].amount = to_them;
|
|
tx->output[1].script = tal_dup_arr(tx, u8,
|
|
their_script, tal_count(their_script),
|
|
0);
|
|
|
|
assert(tx->output[0].amount + tx->output[1].amount <= anchor_satoshis);
|
|
|
|
permute_outputs(tx->output, 2, NULL);
|
|
return tx;
|
|
}
|