diff --git a/src/types/edge.ts b/src/types/edge.ts
index ab373967..18a1a7a8 100644
--- a/src/types/edge.ts
+++ b/src/types/edge.ts
@@ -1,7 +1,35 @@
 import { CSSProperties } from 'vue'
-import { ArrowHeadType, Position, Element } from './flow'
+import { Position, Element } from './flow'
 import { GraphNode } from './node'
 
+export enum MarkerType {
+  Arrow = 'arrow',
+  ArrowClosed = 'arrowclosed',
+}
+
+export interface EdgeMarker {
+  type: MarkerType
+  color?: string
+  width?: number
+  height?: number
+  markerUnits?: string
+  orient?: string
+  strokeWidth?: number
+}
+
+export interface MarkerProps {
+  id: string
+  type: MarkerType
+  color?: string
+  width?: number
+  height?: number
+  markerUnits?: string
+  orient?: string
+  strokeWidth?: number
+}
+
+export type EdgeMarkerType = string | EdgeMarker
+
 export interface Edge<T = any> extends Element<T> {
   source: string
   target: string
@@ -15,14 +43,16 @@ export interface Edge<T = any> extends Element<T> {
   labelBgPadding?: [number, number]
   labelBgBorderRadius?: number
   animated?: boolean
-  arrowHeadType?: ArrowHeadType
-  markerEndId?: string
+  markerStart?: EdgeMarkerType
+  markerEnd?: EdgeMarkerType
   updatable?: boolean
 }
 
 export interface GraphEdge<T = any> extends Edge<T> {
   sourceNode: GraphNode
   targetNode: GraphNode
+  selected?: boolean
+  z?: number
 }
 
 export interface EdgeProps<Data = any> {
@@ -53,8 +83,9 @@ export interface EdgeProps<Data = any> {
   labelBgPadding?: [number, number]
   labelBgBorderRadius?: number
   animated?: boolean
-  arrowHeadType?: ArrowHeadType
   updatable?: boolean
+  markerStart?: EdgeMarkerType
+  markerEnd?: any
 }
 
 export interface SmoothStepEdgeProps<T = any> extends EdgeProps<T> {
@@ -67,3 +98,35 @@ export interface EdgePositions {
   targetX: number
   targetY: number
 }
+
+export interface GetCenterParams {
+  sourceX: number
+  sourceY: number
+  targetX: number
+  targetY: number
+  sourcePosition?: Position
+  targetPosition?: Position
+}
+
+export interface GetBezierPathParams {
+  sourceX: number
+  sourceY: number
+  sourcePosition?: Position
+  targetX: number
+  targetY: number
+  targetPosition?: Position
+  centerX?: number
+  centerY?: number
+}
+
+export interface GetSmoothStepPathParams {
+  sourceX: number
+  sourceY: number
+  sourcePosition?: Position
+  targetX: number
+  targetY: number
+  targetPosition?: Position
+  borderRadius?: number
+  centerX?: number
+  centerY?: number
+}
diff --git a/src/types/flow.ts b/src/types/flow.ts
index c78ce945..dfb6c399 100644
--- a/src/types/flow.ts
+++ b/src/types/flow.ts
@@ -53,11 +53,6 @@ export interface Rect extends Dimensions, XYPosition {}
 
 export type SnapGrid = [number, number]
 
-export enum ArrowHeadType {
-  Arrow = 'arrow',
-  ArrowClosed = 'arrowclosed',
-}
-
 export enum BackgroundVariant {
   Lines = 'lines',
   Dots = 'dots',
@@ -142,8 +137,7 @@ export interface FlowProps<DataNode = any, DataEdge = DataNode> {
   defaultPosition?: [number, number]
   translateExtent?: CoordinateExtent
   nodeExtent?: CoordinateExtent
-  arrowHeadColor?: string
-  markerEndId?: string
+  defaultMarkerColor?: string
   zoomOnScroll?: boolean
   zoomOnPinch?: boolean
   panOnScroll?: boolean
@@ -156,4 +150,4 @@ export interface FlowProps<DataNode = any, DataEdge = DataNode> {
   loading?: string
 }
 
-export type FlowOptions = FlowProps
+export type FlowOptions<N = any, E = N> = FlowProps<N, E>