107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
#include <common/json_command.h>
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#include <common/jsonrpc_errors.h>
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#include <common/wallet_tx.h>
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#include <inttypes.h>
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#include <wallet/wallet.h>
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void wtx_init(struct command *cmd, struct wallet_tx *wtx, struct amount_sat max)
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{
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wtx->cmd = cmd;
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wtx->amount = max;
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}
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struct command_result *param_wtx(struct command *cmd,
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const char *name,
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const char *buffer,
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const jsmntok_t *tok,
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struct wallet_tx *wtx)
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{
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struct amount_sat max = wtx->amount;
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if (json_tok_streq(buffer, tok, "all")) {
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wtx->all_funds = true;
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return NULL;
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}
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wtx->all_funds = false;
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if (!parse_amount_sat(&wtx->amount,
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buffer + tok->start, tok->end - tok->start))
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return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
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"'%s' should be satoshis or 'all', not '%.*s'",
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name,
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tok->end - tok->start,
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buffer + tok->start);
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if (amount_sat_greater(wtx->amount, max))
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return command_fail(wtx->cmd, FUND_MAX_EXCEEDED,
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"Amount exceeded %s",
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type_to_string(tmpctx, struct amount_sat,
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&max));
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return NULL;
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}
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static struct command_result *check_amount(const struct wallet_tx *wtx,
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struct amount_sat amount)
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{
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if (tal_count(wtx->utxos) == 0) {
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return command_fail(wtx->cmd, FUND_CANNOT_AFFORD,
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"Cannot afford transaction");
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}
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if (amount_sat_less(amount, get_chainparams(wtx->cmd->ld)->dust_limit)) {
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return command_fail(wtx->cmd, FUND_OUTPUT_IS_DUST,
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"Output %s would be dust",
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type_to_string(tmpctx, struct amount_sat,
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&amount));
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}
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return NULL;
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}
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struct command_result *wtx_select_utxos(struct wallet_tx *tx,
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u32 fee_rate_per_kw,
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size_t out_len,
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u32 maxheight)
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{
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struct command_result *res;
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struct amount_sat fee_estimate;
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if (tx->all_funds) {
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struct amount_sat amount;
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tx->utxos = wallet_select_all(tx, tx->cmd->ld->wallet,
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fee_rate_per_kw, out_len,
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maxheight,
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&amount,
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&fee_estimate);
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res = check_amount(tx, amount);
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if (res)
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return res;
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/* tx->amount is max permissible */
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if (amount_sat_less_eq(amount, tx->amount)) {
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tx->change = AMOUNT_SAT(0);
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tx->change_key_index = 0;
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tx->amount = amount;
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return NULL;
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}
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/* Too much? Try again, but ask for limit instead. */
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tx->all_funds = false;
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tx->utxos = tal_free(tx->utxos);
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}
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tx->utxos = wallet_select_coins(tx, tx->cmd->ld->wallet,
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tx->amount,
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fee_rate_per_kw, out_len,
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maxheight,
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&fee_estimate, &tx->change);
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res = check_amount(tx, tx->amount);
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if (res)
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return res;
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if (amount_sat_less(tx->change, get_chainparams(tx->cmd->ld)->dust_limit)) {
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tx->change = AMOUNT_SAT(0);
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tx->change_key_index = 0;
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} else {
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tx->change_key_index = wallet_get_newindex(tx->cmd->ld);
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}
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return NULL;
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}
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