Function shachain_get_secret

common/derive_basepoints.c:269–283

}

bool shachain_get_secret(const struct shachain *shachain,
			 u64 commit_num,
			 struct secret *preimage)
{
	struct sha256 sha;

	if (commit_num >= (1ULL << SHACHAIN_BITS))
		return false;

	if (!shachain_get_hash(shachain, shachain_index(commit_num), &sha))
		return false;
	BUILD_ASSERT(sizeof(*preimage) == sizeof(sha));
	memcpy(preimage, &sha, sizeof(*preimage));
	return true;
}