multi-gpu-miner.go

package main

import (
	"fmt"
	"math/rand"
	"strconv"
	"sync"
	"time"
)

// Mockup of a simulated Keccak hash function
func simulateKeccakHash(input string) string {
	// Simulated hash function implementation
	return "0000" + strconv.FormatInt(rand.Int63(), 16) // Simulate 256-bit hash output with leading zeros
}

// Mining job structure
type MiningJob struct {
	Header string
	Target uint64
}

// Mining worker function
func miningWorker(id int, jobs <-chan MiningJob, wg *sync.WaitGroup) {
	defer wg.Done()

	for job := range jobs {
		// Attempt to find a valid solution
		nonce := uint64(0)
		for {
			// Construct the block header with the nonce
			headerWithNonce := job.Header + strconv.FormatUint(nonce, 10)

			// Hash the header with the nonce
			hash := simulateKeccakHash(headerWithNonce)

			// Convert the hash to a big integer
			hashInt, _ := strconv.ParseUint(hash, 16, 64)

			// Check if the hash meets the target
			if hashInt < job.Target {
				// Valid solution found, submit it to the mining pool
				fmt.Printf("Valid solution found by Worker %d: nonce %d\n", id, nonce)
				// Simulated submission to the pool
				// submitSolution(headerWithNonce, hash)

				break
			}

			// Increment the nonce for the next iteration
			nonce++

			// Introduce a small delay to simulate mining process
			time.Sleep(10 * time.Millisecond)
		}
	}
}

func main() {
	// Simulated mining pool providing jobs
	pool := make(chan MiningJob, 10)
	for i := 0; i < 10; i++ {
		job := MiningJob{
			Header: fmt.Sprintf("BlockHeader%d", i),
			Target: 1000, // Simulated target value
		}
		pool <- job
	}
	close(pool)

	// Number of mining workers
	numWorkers := 4

	// Wait group for workers
	var wg sync.WaitGroup
	wg.Add(numWorkers)

	// Start mining workers
	for i := 0; i < numWorkers; i++ {
		go miningWorker(i+1, pool, &wg)
	}

	// Wait for all workers to finish
	wg.Wait()
}