61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
#include "bitcoin/pubkey.h"
|
|
#include "bitcoin/script.h"
|
|
#include "bitcoin/shadouble.h"
|
|
#include "bitcoin/tx.h"
|
|
#include "close_tx.h"
|
|
#include "permute_tx.h"
|
|
#include "pkt.h"
|
|
#include "protobuf_convert.h"
|
|
|
|
struct bitcoin_tx *create_close_tx(const tal_t *ctx,
|
|
OpenChannel *ours,
|
|
OpenChannel *theirs,
|
|
int64_t delta,
|
|
const struct sha256_double *anchor_txid,
|
|
uint64_t input_amount,
|
|
unsigned int anchor_output)
|
|
{
|
|
struct bitcoin_tx *tx;
|
|
const u8 *redeemscript;
|
|
struct pubkey ourkey, theirkey;
|
|
struct sha256 redeem;
|
|
|
|
/* 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_output;
|
|
tx->input[0].input_amount = input_amount;
|
|
|
|
/* Outputs goes to final pubkey */
|
|
if (!proto_to_pubkey(ours->final, &ourkey))
|
|
return tal_free(tx);
|
|
if (!proto_to_pubkey(theirs->final, &theirkey))
|
|
return tal_free(tx);
|
|
|
|
/* delta must make sense. */
|
|
if (delta < 0 && ours->anchor->total - ours->commitment_fee < -delta)
|
|
return tal_free(tx);
|
|
if (delta > 0 && theirs->anchor->total - theirs->commitment_fee < delta)
|
|
return tal_free(tx);
|
|
|
|
proto_to_sha256(ours->revocation_hash, &redeem);
|
|
|
|
/* One output is to us. */
|
|
tx->output[0].amount = ours->anchor->total - ours->commitment_fee + delta;
|
|
redeemscript = bitcoin_redeem_single(tx, &ourkey);
|
|
tx->output[0].script = scriptpubkey_p2sh(tx, redeemscript);
|
|
tx->output[0].script_length = tal_count(tx->output[0].script);
|
|
|
|
/* Other output is to them. */
|
|
tx->output[1].amount = theirs->anchor->total - theirs->commitment_fee - delta;
|
|
redeemscript = bitcoin_redeem_single(tx, &theirkey);
|
|
tx->output[1].script = scriptpubkey_p2sh(tx, redeemscript);
|
|
tx->output[1].script_length = tal_count(tx->output[1].script);
|
|
|
|
tx->fee = ours->commitment_fee + theirs->commitment_fee;
|
|
permute_outputs(tx->output, 2, NULL);
|
|
return tx;
|
|
}
|