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bbac67f108
We were using changekey as the flag to produce change, not changesat, but the caller was using changesat as the flag. Also, don't allocate changekey at all if we don't need it; this means valgrind will complain if we use it at all, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
#include "withdraw_tx.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/key_derive.h>
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#include <common/permute_tx.h>
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#include <common/utxo.h>
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#include <wally_bip32.h>
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#include <string.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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u8 *destination,
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const u64 withdraw_amount,
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const struct pubkey *changekey,
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const u64 changesat,
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const struct ext_key *bip32_base)
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{
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struct bitcoin_tx *tx =
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bitcoin_tx(ctx, tal_count(utxos), changesat ? 2 : 1);
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for (size_t i = 0; i < tal_count(utxos); i++) {
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tx->input[i].txid = utxos[i]->txid;
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tx->input[i].index = utxos[i]->outnum;
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tx->input[i].amount = tal_dup(tx, u64, &utxos[i]->amount);
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if (utxos[i]->is_p2sh && bip32_base) {
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struct pubkey key;
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bip32_pubkey(bip32_base, &key, utxos[i]->keyindex);
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tx->input[i].script =
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bitcoin_scriptsig_p2sh_p2wpkh(tx, &key);
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}
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}
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tx->output[0].amount = withdraw_amount;
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tx->output[0].script = destination;
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if (changesat != 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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tx->output[1].script = scriptpubkey_p2wpkh(tx, changekey);
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tx->output[1].amount = changesat;
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permute_outputs(tx->output, tal_count(tx->output), map);
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}
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permute_inputs(tx->input, tal_count(tx->input), (const void **)utxos);
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return tx;
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}
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