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find_p2sh_out: extract helper.

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Really only for our silly little utils.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2015-06-08 15:24:10 +09:30
parent 7175d73573
commit ecb39efed1
6 changed files with 52 additions and 50 deletions
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27
create-commit-spend-tx.c
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@@ -20,6 +20,7 @@
#include "pubkey.h"
#include "bitcoin_address.h"
#include "opt_bits.h"
#include "find_p2sh_out.h"
#include <openssl/ec.h>
#include <unistd.h>
@@ -32,10 +33,10 @@ int main(int argc, char *argv[])
EC_KEY *privkey;
bool testnet;
struct pubkey pubkey1, pubkey2, outpubkey;
u8 *redeemscript, *p2sh, *tx_arr;
u8 *redeemscript, *tx_arr;
char *tx_hex;
struct sha256 rhash;
size_t i;
size_t p2sh_out;
u64 fee = 10000;
err_set_progname(argv[0]);
@@ -87,29 +88,17 @@ int main(int argc, char *argv[])
o2->locktime_seconds,
&pubkey2, &rhash);
/* This is the scriptPubKey commit tx will have */
p2sh = scriptpubkey_p2sh(ctx, redeemscript);
/* Which output of commit tx are we spending? */
for (i = 0; i < commit->output_count; i++) {
if (commit->output[i].script_length != tal_count(p2sh))
continue;
if (memcmp(commit->output[i].script, p2sh, tal_count(p2sh)) == 0)
break;
}
if (i == commit->output_count)
errx(1, "No matching output in %s", argv[1]);
/* Now, create transaction to spend it. */
tx = bitcoin_tx(ctx, 1, 1);
bitcoin_txid(commit, &tx->input[0].txid);
tx->input[0].index = i;
p2sh_out = find_p2sh_out(commit, redeemscript);
tx->input[0].index = p2sh_out;
if (commit->output[i].amount <= fee)
if (commit->output[p2sh_out].amount <= fee)
errx(1, "Amount of %llu won't exceed fee",
(unsigned long long)commit->output[i].amount);
(unsigned long long)commit->output[p2sh_out].amount);
tx->output[0].amount = commit->output[i].amount - fee;
tx->output[0].amount = commit->output[p2sh_out].amount - fee;
tx->output[0].script = scriptpubkey_p2sh(tx,
bitcoin_redeem_single(tx, &outpubkey));
tx->output[0].script_length = cpu_to_le32(tal_count(tx->output[0].script));