export default function toHexString ( value ) { const hexTable = [ ] ; for ( let i = 0 ; i < 256 ; i ++ ) { hexTable [ i ] = ( i <= 15 ? '0' : '' ) + i . toString ( 16 ) ; } const id = Object . keys ( value . id ) . map ( ( key ) => value . id [ key ] ) ; let hexString = '' ; for ( const el of id ) { hexString += hexTable [ el ] ; } return hexString ; }