You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.5 KiB
69 lines
1.5 KiB
#include <common/wallet_tx.h>
|
|
#include <inttypes.h>
|
|
#include <lightningd/jsonrpc_errors.h>
|
|
#include <wallet/wallet.h>
|
|
|
|
void wtx_init(struct command *cmd, struct wallet_tx * wtx)
|
|
{
|
|
wtx->cmd = cmd;
|
|
wtx->amount = 0;
|
|
wtx->change_key_index = 0;
|
|
wtx->utxos = NULL;
|
|
wtx->all_funds = false;
|
|
}
|
|
|
|
static bool check_amount(const struct wallet_tx *tx, u64 amount)
|
|
{
|
|
if (!tx->utxos) {
|
|
command_fail(tx->cmd, FUND_CANNOT_AFFORD,
|
|
"Cannot afford transaction");
|
|
return false;
|
|
}
|
|
if (amount < 546) {
|
|
command_fail(tx->cmd, FUND_OUTPUT_IS_DUST,
|
|
"Output %"PRIu64" satoshis would be dust",
|
|
amount);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool wtx_select_utxos(struct wallet_tx * tx, u32 fee_rate_per_kw,
|
|
size_t out_len)
|
|
{
|
|
u64 fee_estimate;
|
|
if (tx->all_funds) {
|
|
u64 amount;
|
|
tx->utxos = wallet_select_all(tx->cmd, tx->cmd->ld->wallet,
|
|
fee_rate_per_kw, out_len,
|
|
&amount,
|
|
&fee_estimate);
|
|
if (!check_amount(tx, amount))
|
|
return false;
|
|
|
|
if (amount <= tx->amount) {
|
|
tx->change = 0;
|
|
tx->amount = amount;
|
|
return true;
|
|
}
|
|
|
|
/* Too much? Try again, but ask for limit instead. */
|
|
tx->all_funds = false;
|
|
tx->utxos = tal_free(tx->utxos);
|
|
}
|
|
|
|
tx->utxos = wallet_select_coins(tx->cmd, tx->cmd->ld->wallet,
|
|
tx->amount,
|
|
fee_rate_per_kw, out_len,
|
|
&fee_estimate, &tx->change);
|
|
if (!check_amount(tx, tx->amount))
|
|
return false;
|
|
|
|
if (tx->change < 546) {
|
|
tx->change = 0;
|
|
tx->change_key_index = 0;
|
|
} else {
|
|
tx->change_key_index = wallet_get_newindex(tx->cmd->ld);
|
|
}
|
|
return true;
|
|
}
|
|
|