2 constructor(seqnum,machineid,prevhmac,hmac){
4 this.RESERVED_SPACE=64;
6 (typeof seqnum === "number")? this.seqnum = seqnum : throw new Error("seqnum should be a number");
7 (typeof machineid === "number")? this.machineid = seqnum : throw new Error("seqnum should be a number");