Method ComputeBlockNonce

pow/cpuminer/miner.go:66–102

ComputeBlockNonce find nonce make HashBlock() match the MiningBlock Difficulty from the startNonce if interrupted or stopped highest difficulty nonce will be sent to the NonceCh HACK(auxten): make calculation parallel.

(
	block MiningBlock,
	startNonce Uint256,
	difficulty int,
)

// if interrupted or stopped highest difficulty nonce will be sent to the NonceCh
//  HACK(auxten): make calculation parallel.
func (miner *CPUMiner) ComputeBlockNonce(
	block MiningBlock,
	startNonce Uint256,
	difficulty int,
) (err error) {

	var (
		bestNonce NonceInfo
	)
	for i := startNonce; ; i.Inc() {
		select {
		case <-block.Stop:
			log.Info("stop block nonce job")
			block.NonceChan <- bestNonce
			return errors.New("mining job stopped")
		case <-miner.quit:
			log.Info("stop block nonce worker")
			block.NonceChan <- bestNonce
			return errors.New("miner interrupted")
		default:
			currentHash := HashBlock(block.Data, i)
			currentDifficulty := currentHash.Difficulty()
			if currentDifficulty >= difficulty {
				bestNonce.Difficulty = currentDifficulty
				bestNonce.Nonce = i
				bestNonce.Hash.SetBytes(currentHash[:])
				block.NonceChan <- bestNonce
				return
			}
			if currentDifficulty > bestNonce.Difficulty {
				bestNonce.Difficulty = currentDifficulty
				bestNonce.Nonce = i
				bestNonce.Hash.SetBytes(currentHash[:])
			}
		}
	}
}