const getVersion = ( data ) : number => { const dataHeader = new Uint8Array ( data , 0 , 4 ) ; if ( dataHeader [ 0 ] === 80 && dataHeader [ 1 ] === 75 && dataHeader [ 2 ] === 3 && dataHeader [ 3 ] === 4 ) { return 1 ; } return 2 ; } ; export const Utils = { getVersion } ;