└── bit


/bit:
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 1 | #include <random>
 2 | #include <bitcoin/bitcoin.hpp>
 3 | 
 4 | // The string we are searching for
 5 | const std::string search = "1kid";
 6 | 
 7 | // Generate a random secret key. A random 32 bytes.
 8 | bc::ec_secret random_secret(std::default_random_engine& engine);
 9 | // Extract the Bitcoin address from an EC secret.
10 | std::string bitcoin_address(const bc::ec_secret& secret);
11 | // Case insensitive comparison with the search string.
12 | bool match_found(const std::string& address);
13 | 
14 | int main()
15 | {
16 |     // random_device on Linux uses "/dev/urandom"
17 |     // CAUTION: Depending on implementation this RNG may not be secure enough!
18 |     // Do not use vanity keys generated by this example in production
19 |     std::random_device random;
20 |     std::default_random_engine engine(random());
21 |     
22 |     // Loop continuously...
23 |     while (true)
24 |     {
25 |         // Generate a random secret.
26 |         bc::ec_secret secret = random_secret(engine);
27 |         // Get the address.
28 |         std::string address = bitcoin_address(secret);
29 |         // Does it match our search string? (1kid)
30 |         if (match_found(address))
31 |         {
32 |             // Success!
33 |             std::cout << "Found vanity address! " << address << std::endl;
34 |             std::cout << "Secret: " << bc::encode_base16(secret) << std::endl;
35 |             return 0;
36 |         }
37 |     }
38 |     // Should never reach here!
39 |     return 0;
40 | }
41 | 
42 | bc::ec_secret random_secret(std::default_random_engine& engine)
43 | {
44 |     // Create new secret...
45 |     bc::ec_secret secret;
46 |     // Iterate through every byte setting a random value...
47 |     for (uint8_t& byte: secret)
48 |         byte = engine() & 255;
49 |     // Return result.
50 |     return secret;
51 | }
52 | 
53 | std::string bitcoin_address(const bc::ec_secret& secret)
54 | {
55 |     // Convert secret to payment address
56 |     bc::wallet::ec_private private_key(secret);
57 |     bc::wallet::payment_address payaddr(private_key);
58 |     // Return encoded form.
59 |     return payaddr.encoded();
60 | }
61 | 
62 | bool match_found(const std::string& address)
63 | {
64 |     auto addr_it = address.begin();
65 |     // Loop through the search string comparing it to the lower case
66 |     // character of the supplied address.
67 |     for (auto it = search.begin(); it != search.end(); ++it, ++addr_it)
68 |         if (*it != std::tolower(*addr_it))
69 |             return false;
70 |     // Reached end of search string, so address matches.
71 |     return true;
72 | }
73 | 


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