43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#include "withdraw_tx.h"
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#include <assert.h>
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#include <bitcoin/pubkey.h>
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#include <bitcoin/script.h>
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#include <ccan/ptrint/ptrint.h>
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#include <common/permute_tx.h>
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#include <common/utxo.h>
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#include <string.h>
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#include <wally_bip32.h>
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struct bitcoin_tx *withdraw_tx(const tal_t *ctx,
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const struct utxo **utxos,
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const u8 *destination,
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struct amount_sat withdraw_amount,
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const struct pubkey *changekey,
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struct amount_sat change,
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const struct ext_key *bip32_base,
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int *change_outnum)
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{
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struct bitcoin_tx *tx;
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tx = tx_spending_utxos(ctx, utxos, bip32_base,
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!amount_sat_eq(change, AMOUNT_SAT(0)));
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bitcoin_tx_add_output(tx, destination, &withdraw_amount);
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if (!amount_sat_eq(change, AMOUNT_SAT(0))) {
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const void *map[2];
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map[0] = int2ptr(0);
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map[1] = int2ptr(1);
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bitcoin_tx_add_output(tx, scriptpubkey_p2wpkh(tx, changekey),
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&change);
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permute_outputs(tx, NULL, map);
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if (change_outnum)
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*change_outnum = ptr2int(map[1]);
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} else if (change_outnum)
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*change_outnum = -1;
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permute_inputs(tx, (const void **)utxos);
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assert(bitcoin_tx_check(tx));
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return tx;
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}
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