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lightning/lightningd/build_utxos.h

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lightningd: simple wallet support. This allows us to add funds via the P2SH-wrapped Segwit Transactions. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
8 years ago
#ifndef LIGHTNING_LIGHTNINGD_BUILD_UTXOS_H
#define LIGHTNING_LIGHTNINGD_BUILD_UTXOS_H
#include "config.h"
common: move some files out of lightningd/ Basically all files shared by different daemons. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
7 years ago
#include <common/utxo.h>
lightningd: simple wallet support. This allows us to add funds via the P2SH-wrapped Segwit Transactions. Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
8 years ago
#include <lightningd/lightningd.h>
/* Reserves UTXOs to build tx which pays this amount; returns NULL if
lightningd/build_utxos: don&#39;t tell them they can pass NULL for change. They can&#39;t: wallet_select_coins() doesn&#39;t allow it. Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
7 years ago
* impossible. */
funding_tx: permute inputs, don&#39;t re-calculate fees built_utxos needs to calculate fees for figuring out how many utxos to use, so fix that logic and rely on it. We make build_utxos return a pointer array, so funding_tx can simply hand that to permute_inputs. Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
8 years ago
const struct utxo **build_utxos(const tal_t *ctx,
struct lightningd *ld, u64 satoshi_out,
u32 feerate_per_kw, u64 dust_limit,
build_utxos: fix weight calculation, and make more accurate. Accuracy improvements: 1. We assumed the output was a p2wpkh, but it can be user-supplied now. 2. We assumed we always had change; remove this for wallet_select_all. Calculation out-by-one fixes: 1. We need to add 1 byte (4 sipa) for the input count. 2. We need to add 1 byte (4 sipa) for the output count. 3. We need to add 1 byte (4 sipa) for the output script length for each output. 4. We need to add 1 byte (4 sipa) for the input script length for each input. 5. We need to add 1 byte (4 sipa) for the PUSH optcode for each P2SH input. The results are now a slight overestimate (due to guessing 73 bytes for signature, whereas they&#39;re 71 or 72 in practice). Fixes: #458 Reported-by: Jonas Nick @jonasnick Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
7 years ago
size_t outputscriptlen,
funding_tx: permute inputs, don&#39;t re-calculate fees built_utxos needs to calculate fees for figuring out how many utxos to use, so fix that logic and rely on it. We make build_utxos return a pointer array, so funding_tx can simply hand that to permute_inputs. Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
8 years ago
u64 *change_satoshis, u32 *change_keyindex);
lightningd: simple wallet support. This allows us to add funds via the P2SH-wrapped Segwit Transactions. Signed-off-by: Rusty Russell &lt;rusty@rustcorp.com.au&gt;
8 years ago
#endif /* LIGHTNING_LIGHTNINGD_BUILD_UTXOS_H */