Function hash_from_base

common/bolt12_id.c:7–18

Given a base secret, an easy one-way function is SHA(base || input) */

/* Given a base secret, an easy one-way function is SHA(base || input) */
static void hash_from_base(const struct secret *base_secret,
			   const void *input,
			   size_t input_len,
			   struct sha256 *hash)
{
	struct sha256_ctx shactx;

	sha256_init(&shactx);
	sha256_update(&shactx, base_secret, sizeof(*base_secret));
	sha256_update(&shactx, input, input_len);
	sha256_done(&shactx, hash);
}

void bolt12_path_secret(const struct secret *base_secret,
			const struct sha256 *payment_hash,