Function param_amount

plugins/offers_offer.c:41–106

}

static struct command_result *param_amount(struct command *cmd,
					   const char *name,
					   const char *buffer,
					   const jsmntok_t *tok,
					   struct tlv_offer *offer)
{
	const struct iso4217_name_and_divisor *isocode;
	jsmntok_t number, whole, frac;
	u64 cents;

	if (msat_or_any(buffer, tok, offer))
		return NULL;

	offer->amount = tal(offer, u64);

	/* BOLT-offers #12:
	 *
	 * - MUST specify `iso4217` as an ISO 4712 three-letter code.
	 * - MUST specify `amount` in the currency unit adjusted by the ISO 4712
	 *   exponent (e.g. USD cents).
	 */
	if (tok->end - tok->start < ISO4217_NAMELEN)
		return command_fail_badparam(cmd, name, buffer, tok,
					     "should be 'any', msatoshis or <amount>[.<amount>]<ISO-4712>");

	isocode = find_iso4217(buffer + tok->end - ISO4217_NAMELEN, ISO4217_NAMELEN);
	if (!isocode)
		return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
				    "Unknown currency suffix %.*s",
				    ISO4217_NAMELEN,
				    buffer + tok->end - ISO4217_NAMELEN);

	offer->currency
		= tal_dup_arr(offer, utf8, isocode->name, ISO4217_NAMELEN, 0);

	number = *tok;
	number.end -= ISO4217_NAMELEN;
	if (!split_tok(buffer, &number, '.', &whole, &frac)) {
		whole = number;
		cents = 0;
	} else {
		if (frac.end - frac.start != isocode->minor_unit)
			return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
					    "Currency %s requires %u minor units",
					    isocode->name, isocode->minor_unit);
		if (!json_to_u64(buffer, &frac, &cents))
			return command_fail_badparam(cmd, name, buffer,
						     &number,
						     "Bad minor units");
	}

	if (!json_to_u64(buffer, &whole, offer->amount))
		return command_fail_badparam(cmd, name, buffer, tok,
					     "should be 'any', msatoshis or <ISO-4712><amount>[.<amount>]");

	for (size_t i = 0; i < isocode->minor_unit; i++) {
		if (mul_overflows_u64(*offer->amount, 10))
			return command_fail_badparam(cmd, name, buffer,