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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 "protobuf_convert.h"
struct bitcoin_tx *create_close_tx(const tal_t *ctx,
OpenChannel *ours,
OpenChannel *theirs,
OpenAnchor *anchor,
uint64_t to_us, uint64_t to_them)
{
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. */
proto_to_sha256(anchor->txid, &tx->input[0].txid.sha);
tx->input[0].index = anchor->output_index;
tx->input[0].input_amount = anchor->amount;
/* Outputs goes to final pubkey */
if (!proto_to_pubkey(ours->final_key, &ourkey))
return tal_free(tx);
if (!proto_to_pubkey(theirs->final_key, &theirkey))
return tal_free(tx);
proto_to_sha256(ours->revocation_hash, &redeem);
/* One output is to us. */
tx->output[0].amount = to_us;
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 = to_them;
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);
assert(tx->output[0].amount + tx->output[1].amount
<= tx->input[0].input_amount);
tx->fee = tx->input[0].input_amount
- (tx->output[0].amount + tx->output[1].amount);
permute_outputs(tx->output, 2, NULL);
return tx;
}