// calculate target difficulty for this client
// heavily inspired by https://github.com/ming08108/EtherPool (shareHandler.js)
calculateTarget(work, secpershare) {
if ((this.mhs == this._lastmhs) && (this._secpershare == secpershare)) {
// return cached target to avoid recalculation
return this._target;
}
// get desired number of seconds between shares
var sec = new BN(secpershare);
// calculate hashes per second
var hs = new BN(this.mhs * 1000).mul(new BN(1000));
// total number of hashes before finding solution
var th = sec.mul(hs);
// calculate target for worker
var target = ethUtil.TWO_POW256.div(th);
// update cached values
this._lastmhs = this.mhs;
this._secpershare = secpershare;
this._target = '0x' + target.toString(16, 64);
this._diff = th.toString();
logger.debug('New target for %s', this.wallet);
logger.debug(' Current calculated MHS: %s MH/s', this.mhs);
return this._target;
}
NOT: function (runState) {
runState.stack.push(
new Buffer(utils.TWO_POW256.subn(1).sub(new BN(runState.stack.pop()))
.toArray())
)
},