Function calc_offer

common/bolt12.c:697–713

}

static void calc_offer(const u8 *tlvstream, struct sha256 *id)
{
	size_t start1, len1, start2, len2;
	struct sha256_ctx ctx;

	/* BOLT #12:
	 * A writer of an offer:
	 * - MUST NOT set any TLV fields outside the inclusive ranges: 1 to 79 and 1000000000 to 1999999999.
	 */
	len1 = tlv_span(tlvstream, 1, 79, &start1);
	len2 = tlv_span(tlvstream, 1000000000, 1999999999, &start2);

	sha256_init(&ctx);
	sha256_update(&ctx, tlvstream + start1, len1);
	sha256_update(&ctx, tlvstream + start2, len2);
	sha256_done(&ctx, id);
}

void offer_offer_id(const struct tlv_offer *offer, struct sha256 *id)
{