main.cpp

#include <bits/stdc++.h>
#include "include/block.h"
#include "include/sha256.h"
#include "include/merkle.h"
#include "include/utils.h"

#include "src/block.cpp"
#include "src/sha256.cpp"
#include "src/merkle.cpp"
#include "src/utils.cpp"

using namespace std;

/*
    ===================== BLOCK MINING SIMULATION =====================
*/
int main() {
    vector<string> transactions = {
        "Alice pays Bob 5 BTC",
        "Bob pays Charlie 2 BTC",
        "Charlie pays Dave 1 BTC"
    };

    // Compute Merkle root
    vector<u8> root = merkle_root_raw(transactions);

    // Create block header
    Blockheader bh;
    bh.version = 1;
    bh.prev_hash = vector<u8>(32, 0);
    bh.merkle_root = root;
    bh.timestamp = time(nullptr);
    bh.bits = 0x1f00ffff;
    bh.nonce = 0;

    cout << "Mining...\n";

    // Proof-of-Work loop
    while (true) {
        vector<u8> header = serialize_header(bh);
        vector<u8> hash = double_sha256_raw(header);

        // Difficulty: 2 leading zero BYTES
        if (has_leading_zero_bytes(hash, 2)) {
            cout << "Block mined!\n";
            cout << "Nonce: " << bh.nonce << "\n";
            cout << "Hash:  " << to_hex(hash) << endl;
            break;
        }

        bh.nonce++;
    }
}