How can I update default slippage in widget

This is currently a bit hidden. You have to set the sdkConfig in the widget configuration: https://docs.li.fi/integrate-li.fi-widget/widget-api-reference

It allows you to set defaultRouteOptions https://docs.li.fi/integrate-li.fi-js-sdk/set-up-the-sdk

Part of the defaultRouteOptions is the slippage: https://docs.li.fi/integrate-li.fi-js-sdk/request-a-route/set-route-options

Example configuration:

  const widgetConfig: WidgetConfig = {
	integrator: 'Ten Finance',
  	containerStyle: {
    		border: '1px solid rgb(234, 234, 234)',
    		borderRadius: '16px',
  	},
  	fromChain: 56,
  	toChain: 137,
  	variant: 'expandable',
  	sdkConfig: {   //sdkConfig Not working above configs works
    		defaultRouteOptions: {
      			slippage: 0.02,
      			order: 'SAFEST',
    		}
  	},
  };