Payment/Model/PaymentStates.php
static public function getStates()
    {
        return [
            static::STATE_NEW,
            static::STATE_PENDING,
            static::STATE_CAPTURED,
            static::STATE_FAILED,
            static::STATE_CANCELED,
            static::STATE_REFUNDED,
            static::STATE_AUTHORIZED,
            static::STATE_SUSPENDED,
            static::STATE_EXPIRED,
            static::STATE_UNKNOWN,
            static::STATE_OUTSTANDING,
            static::STATE_DEPOSIT,
            static::STATE_COMPLETED,
        ];
    }
static public function getStates()
    {
        return [
            static::STATE_NEW,
            static::STATE_PENDING,
            static::STATE_CAPTURED,
            static::STATE_FAILED,
            static::STATE_CANCELED,
            static::STATE_REFUNDED,
            static::STATE_AUTHORIZED,
            static::STATE_SUSPENDED,
            static::STATE_EXPIRED,
            static::STATE_UNKNOWN,
            static::STATE_OUTSTANDING,
            static::STATE_DEPOSIT,
            static::STATE_COMPLETED,
        ];
    }
Returns all the states.

@return array