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

#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;
}