Hi,
In this example the validType is picked up. All that remains is for the correct evaluation of the SHA1 type.
http://jsfiddle.net/3L4ej4dx/88/To pick up the validate type the column is described as follows:
{field:'SHA1',title:'HASH Code',width:'10%',align:'center',editor:{type:'textbox',options:{validType:'SHA1'}}}
It all comes down to the curly braces you see.