ratelimit

type Limits interface {
	CertificatesPerName() RateLimitPolicy
	RegistrationsPerIP() RateLimitPolicy
	RegistrationsPerIPRange() RateLimitPolicy
	PendingAuthorizationsPerAccount() RateLimitPolicy
	InvalidAuthorizationsPerAccount() RateLimitPolicy
	CertificatesPerFQDNSet() RateLimitPolicy
	CertificatesPerFQDNSetFast() RateLimitPolicy
	NewOrdersPerAccount() RateLimitPolicy
	LoadPolicies(contents []byte) error
}

type RateLimitPolicy struct {
	// How long to count items for
	Window config.Duration `yaml:"window"`
	// The max number of items that can be present before triggering the rate
	// limit. Zero means "no limit."
	Threshold int64 `yaml:"threshold"`
	// A per-key override setting different limits than the default (higher or lower).
	// The key is defined on a per-limit basis and should match the key it counts on.
	// For instance, a rate limit on the number of certificates per name uses name as
	// a key, while a rate limit on the number of registrations per IP subnet would
	// use subnet as a key. Note that a zero entry in the overrides map does not
	// mean "no limit," it means a limit of zero. An entry of -1 means
	// "no limit", only for the pending authorizations rate limit.
	Overrides map[string]int64 `yaml:"overrides"`
	// A per-registration override setting. This can be used, e.g. if there are
	// hosting providers that we would like to grant a higher rate of issuance
	// than the default. If both key-based and registration-based overrides are
	// available, whichever is larger takes priority. Note that a zero entry in
	// the overrides map does not mean "no limit", it means a limit of zero.
	RegistrationOverrides map[int64]int64 `yaml:"registrationOverrides"`
}