Function execute_splice

plugins/spender/splice.c:1773–1924

}

static struct command_result *execute_splice(struct command *cmd,
					      struct splice_cmd *splice_cmd)
{
	struct splice_script_result *action;
	struct splice_cmd_action_state *state;
	struct wally_psbt_output *output;
	u64 serial_id;
	int pays_fee;
	u8 *scriptpubkey;

	/* Basic validation */
	pays_fee = 0;
	for (size_t i = 0; i < tal_count(splice_cmd->actions); i++) {
		int dest_count = 0;
		action = splice_cmd->actions[i];
		state = splice_cmd->states[i];

		if (action->out_ppm && !action->onchain_wallet)
			return do_fail(cmd, splice_cmd, JSONRPC2_INVALID_PARAMS,
					    "Should be no out_ppm on final"
					    " except for the wallet");
		if (splice_cmd->actions[i]->pays_fee) {
			if (pays_fee)
				return do_fail(cmd, splice_cmd,
					       JSONRPC2_INVALID_PARAMS,
					       "Only one item may pay fee");
			pays_fee++;
		}
		if (splice_cmd->actions[i]->channel_id)
			dest_count++;
		if (splice_cmd->actions[i]->bitcoin_address)
			dest_count++;
		if (splice_cmd->actions[i]->onchain_wallet)
			dest_count++;
		if (dest_count < 1)
			return do_fail(cmd, splice_cmd, JSONRPC2_INVALID_PARAMS,
					    "Must specify 1 destination per");
		if (dest_count > 1)
			return do_fail(cmd, splice_cmd, JSONRPC2_INVALID_PARAMS,
					    "Too many destinations per");

		/* If user specifies both sats in and out, we just use the
		 * larger of the two and subtract the smaller. */
		if (amount_sat_greater(action->in_sat, action->out_sat)) {
			if (!amount_sat_sub(&action->in_sat, action->in_sat,
					    action->out_sat))
				return do_fail(cmd, splice_cmd,
						    JSONRPC2_INVALID_PARAMS,
						    "Unable to sub out_sat from"
						    " in_sat");
			action->out_sat = amount_sat(0);
		} else {
			if (!amount_sat_sub(&action->out_sat, action->out_sat,
					    action->in_sat))
				return do_fail(cmd, splice_cmd,
						    JSONRPC2_INVALID_PARAMS,
						    "Unable to sub in_sat from"
						    " out_sat");