How to record the current eraser settings in an action

I found a usable script. This script successfully allows me to select the eraser tool and then set the flow and opacity. However, there is a problem with setting the eraser size and hardness. Can you help me modify it?

if (documents.length == 0) {
    var d = documents.add();
} else {
    var d = activeDocument;
}

// 创建两个图层以便启用背景和透明
if (d.layers.length == 1) {
    d.artLayers.add(); 
}

// 选择橡皮擦工具
var idslct = stringIDToTypeID( "select" );
var desc226 = new ActionDescriptor();
var idnull = stringIDToTypeID( "null" );
var ref170 = new ActionReference();
var idErTl = stringIDToTypeID( "eraserTool" );  // 橡皮擦工具
ref170.putClass( idErTl );
desc226.putReference( idnull, ref170 );
executeAction( idslct, desc226, DialogModes.NO );

// 设置透明度为50%、流量为50%、画笔大小为1400、硬度为100%
var idset = stringIDToTypeID( "set" );
var desc226 = new ActionDescriptor();
var idnull = stringIDToTypeID( "null" );
var ref170 = new ActionReference();
var idErTl = stringIDToTypeID( "eraserTool" );  // 橡皮擦工具
ref170.putClass( idErTl );
desc226.putReference( idnull, ref170 );

var id12 = stringIDToTypeID( "to" );
var desc5 = new ActionDescriptor();
var id13 = stringIDToTypeID( "opacity" );
var id14 = stringIDToTypeID( "percentUnit" );
desc5.putUnitDouble( id13, id14, 50 );  // 设置透明度为50%

var id19 = stringIDToTypeID( "flow" );
desc5.putUnitDouble( id19, id14, 50 );  // 设置流量为50%

var id20 = stringIDToTypeID( "diameter" );
desc5.putUnitDouble( id20, id14, 1400 );  // 设置画笔大小为1400

var id21 = stringIDToTypeID( "hardness" );
desc5.putUnitDouble( id21, id14, 100 );  // 设置硬度为100%

desc226.putObject( id12, idnull, desc5 );
executeAction( idset, desc226, DialogModes.NO );

'DONE';