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#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,
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;
/* 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);
permute_outputs(ours->seed, theirs->seed, 1, tx->output, 2, NULL);
return tx;
}