Continued with chash:
[core.git] / contrib / chash / chash.php
index f4003c8..ed583d9 100644 (file)
 <?php
 error_reporting(E_ALL | E_STRICT);
 
-define('HASH_ALGO', MHASH_RIPEMD320);
-define('BLOCK_SIZE', 1000);
-define('NONCE_INCREMENT', 0.0000000001);
-define('START_TIME', microtime(TRUE));
+// Load scrypt
+require 'lib/functions.php';
+require 'lib/scrypt.php';
 
-/**
- * Continued-hashing
- *
- * @author             Roland Haeder <roland@mxchange.org>
- * @copyright  Copyright (c) 2013 by Core Developer Team
- * @license            See LICENSE (public-domain)
- */
+define('START_TIME'            , microtime(true));
+define('CHECKPOINT_FILE'           , 'chash.pos');
 
-/**
- * Calculates a simple but stronger hash from given string. No salts are being
- * added here.
- *
- * @param      $str    The string to be hashed
- * @return     $hash   The hash from string $str
- */
-function hashString ($str) {
-       // Calculate strong hash from given string
-       $hash = mhash(HASH_ALGO, $str);
-
-       // Return it hexadecimal-encoded
-       return bin2hex($hash);
-}
+// Hashes needed to complete a "block"
+$GLOBALS['block_size']          = 100;
+$GLOBALS['none_increment']      = (1 / pow(10, 20));
 
-/**
- * Double-hashes given string. This is done by hashing the given string and
- * then hashing the generated hash again.
- *
- * @param      $str    The string to be hashed 4 times
- * @return     $hash   The generated hash
- */
-function doubleHashString ($str) {
-       // Generate hash from given hash
-       $hash = hashString(hashString($str));
+// Automatic saving interval in seconds
+$GLOBALS['flush_file_time']     = 30;
 
-       // Return it
-       return $hash;
-}
-
-/**
- * Calculates a "modula-hash" based given two hashes.
- *
- * @param      $hash1  Hash 1
- * @param      $hash2  Hash 2
- */
-function modulaHash ($hash1, $hash2) {
-       // Both must have same length
-       assert(strlen($hash1) === strlen($hash2));
-
-       // Init new hash
-       $modulaHash = '';
-
-       // "Walk" trough first hash and get every 2 byte of both hashes
-       for ($idx = 0; $idx < strlen($hash1); $idx += 2) {
-               // Init modula value
-               $mod = 0;
-
-               // Get both hash parts and convert to ASCII number
-               $part1 = hexdec(substr($hash1, $idx, 2));
-               $part2 = hexdec(substr($hash2, $idx, 2));
-
-               /*
-                * If part1 is larget part2, part1 is divident and vise-versa. But don't do it
-                * if one is zero
-                */
-               if (($part1 > $part2) && ($part2 > 0)) {
-                       // 'part1' is larger than 'part2'
-                       $mod = $part1 % $part2;
-               } elseif (($part1 < $part2) && ($part1 > 0)) {
-                       // 'part2' is larger than 'part1'
-                       $mod = $part2 % $part1;
-               }
-
-               // "Invert" the result against 255
-               $mod = 255 - $mod;
-
-               // Encode to hex, pre-pad it with zeros and add to new hash
-               $modulaHash .= padHex($mod);
-       } // END - for
-
-       // Modula hash must have same length as input hash
-       assert(strlen($modulaHash) === strlen($hash1));
-
-       // Return modula hash
-       return $modulaHash;
-}
-
-/**
- * Calculates a "sqrt-hash" based given two hashes and single-hash it
- *
- * @param      $hash1  Hash 1
- * @param      $hash2  Hash 2
+/*
+ * How long (in seconds) to try to find a proper hash until the best root hash
+ * is taken.
  */
-function sqrtHash ($hash1, $hash2) {
-       // Both must have same length
-       assert(strlen($hash1) === strlen($hash2));
-
-       // Init new hash
-       $sqrtHash = '';
+$GLOBALS['restart_search_time'] = 1800;
 
-       // "Walk" trough first hash and get every 2 byte of both hashes
-       for ($idx = 0; $idx < strlen($hash1); $idx += 2) {
-               // Init modula value
-               $mod = 0;
+// Hashes per call
+$GLOBALS['hash_cycles'] = 2;
 
-               // Get both hash parts and convert to ASCII number
-               $part1 = hexdec(substr($hash1, $idx, 2));
-               $part2 = hexdec(substr($hash2, $idx, 2));
+// Total restarts
+$GLOBALS['total_restarts'] = 0;
 
-               // Calculate square root of both parts being multiplied and round up, then "invert" it against 255
-               $sqrt = intval(255 - ceil(sqrt($part1 * $part2)));
+// Initial salt (may be overwritten by loading checkpoint file)
+$GLOBALS['salt'] = Scrypt::generateSalt();
 
-               // Encode to hex, pre-pad it with zeros and add to new hash
-               $sqrtHash .= padHex($sqrt);
-       } // END - for
+// Starting difficulty
+$GLOBALS['difficulty'] = 2;
 
-       // "sqrt-hash" must have same length as input hash
-       assert(strlen($sqrtHash) === strlen($hash1));
-
-       // Hash reversed "sqrt-hash" again and return it
-       return hashString(strrev($sqrtHash));
-}
+// Found hashes
+$GLOBALS['found_hashes'] = array([]);
 
 /**
- * Converts a number between 0 and 255 into a zero-padded hexadecimal string
- *
- * @param      $num    Number between 0 and 255
- * @return     $hex    Hexadecimal string, padded with zeros
- */
-function padHex ($num) {
-       // Must be a integer number and between 0 and 255
-       assert(is_int($num));
-       assert($num >= 0);
-       assert($num <= 255);
-
-       // Convert it
-       $hex = str_pad(dechex($num), 2, '0', STR_PAD_LEFT);
-
-       // ... and return it
-       return $hex;
-}
-
-/**
- * Calculates sum from given hash
- *
- * @param      $hash   Hash to calculate sum from
- * @return     $sum    Sum from given hash
- */
-function calculateSumFromHash ($hash) {
-       // Everything starts with zero ...
-       $sum = 0;
-
-       // Loop through hash
-       for ($idx = 0; $idx < (strlen($hash) / 2); $idx++) {
-               // And add it
-               $sum = $sum + (hexdec(substr($hash, $idx, 2)) * $idx & 256);
-       } // END - for
-
-       // And return it
-       return $sum;
-}
-
-/**
- * Calculates new nonce
+ * Continued-hashing
  *
- * @param      $nonce          Old nonce to be used
- * @return     $newNonce       New nonce
+ * @author             Roland Haeder <roland@mxchange.org>
+ * @copyright  Copyright (c) 2013 by Core Developer Team
+ * @license            See LICENSE (public-domain)
  */
-function calculateNonce ($nonce) {
-       // Linear incrementation
-       $newNonce = $nonce + NONCE_INCREMENT;
 
-       // Return new value
-       return $newNonce;
+// Is the check point there?
+if (is_readable(CHECKPOINT_FILE)) {
+       // Load it
+       loadCheckpointFile();
+} else {
+       // Create nonce (very small)
+       initNonce();
 }
 
 /*
@@ -186,173 +58,260 @@ function calculateNonce ($nonce) {
  * known to the public as you can read them here in source code and therefore I
  * will not use them for the real genesis hashes.
  */
-$hashes = array(
+$gensisHashes = array(
        // A famous quote from Deus Ex 2 - Invisible War
-       doublehashString('"Informations must be free." - AI Helios from Deus Ex'),
-       // My name + URL of my first StatusNet instance
-       doubleHashString('Roland Haeder, https://status.mxchange.org'),
+       multiplehashString('"Informations must be free." - AI Helios from Deus Ex'),
+       // My name + URL of my GNUSocial instance
+       multipleHashString('Roland Haeder, https://social.mxchange.org'),
        // A famous quote from Linus Torwalds
-       doubleHashString('"Software is like sex. Its better when its free." - Linus Torwalds'),
-       // Possible truth ;-)
-       doubleHashString('September 11 is a big lie.'),
+       multipleHashString('"Software is like sex. Its better when its free." - Linus Torwalds'),
+       // Well ...
+       multipleHashString('September 11 is a big lie.'),
 
        // GNU is not Uni*
-       doubleHashString('GNU is Not Uni*.'),
+       multipleHashString('GNU is Not Uni*.'),
        // WINE is not an emulator
-       doubleHashString('WINE Is Not an Emulator.'),
+       multipleHashString('WINE Is Not an Emulator.'),
        // FlightGear - Fly free!
-       doubleHashString('FlightGear - Fly free!'),
-       // Linus Torwalds Quote
-       doubleHashString('Your code is shit.. your argument is shit.'),
+       multipleHashString('FlightGear - Fly free!'),
+       // Quote from Linus Torwalds
+       multipleHashString('Your code is shit. Your argument is shit.'),
 );
 
-// Calculate "modula hash" from 1st/4th and 2nd/3rd
-$modulaHashes = array(
-       // "Block" 0
-       modulaHash($hashes[0], $hashes[3]),
-       modulaHash($hashes[1], $hashes[2]),
-
-       // "Block" 1
-       modulaHash($hashes[4], $hashes[7]),
-       modulaHash($hashes[5], $hashes[6]),
+// Calculate first "block"
+$genesisBlock = array(
+       hashString($gensisHashes[0] . $gensisHashes[3]),
+       hashString($gensisHashes[1] . $gensisHashes[2]),
+       hashString($gensisHashes[4] . $gensisHashes[7]),
+       hashString($gensisHashes[5] . $gensisHashes[6]),
 );
 
-// Calculate "sqrt hash"
-$sqrtHashes = array(
-       sqrtHash($modulaHashes[0], $modulaHashes[1]),
-       sqrtHash($modulaHashes[2], $modulaHashes[3])
+// Calulcate final "genesis" hash
+$genesisHash = hashString(
+       $genesisBlock[3] .
+       $genesisBlock[0] .
+       $genesisBlock[2] .
+       $genesisBlock[1]
 );
 
-// Calulcate modula hash
-$modulaHash = doubleHashString(modulaHash($sqrtHashes[0], $sqrtHashes[1]));
+// Get all elements to get the last part out
+$elements = explode('$', $genesisHash);
+
+// This is also the "genesis" hash and first root hash
+$GLOBALS['current_hash'] = $genesisHash;
+$GLOBALS['root_hash']    = $genesisHash;
+$GLOBALS['sum_genesis']  = sumHash($elements[4]);
 
 // Output results
-print ('hashes=' . print_r($hashes, TRUE));
-print ('modulaHashes=' . print_r($modulaHashes, TRUE));
-print ('sqrtHashes=' . print_r($sqrtHashes, TRUE));
-print ('modulaHash=' . $modulaHash . PHP_EOL);
+print ('hashes=' . print_r($gensisHashes, true));
 
 // Total reward + hashes
-$totalReward = 0;
-$totalHashes = 0;
-$totalBlocks = 0;
-
-// Create nonce (small)
-$nonce = 1 / mt_rand();
-
-while (TRUE) {
+$GLOBALS['total_reward']   = 0;
+$GLOBALS['total_hashes']   = 0;
+$GLOBALS['total_found']    = 0;
+$GLOBALS['total_blocks']   = 0;
+$GLOBALS['found_time']     = microtime(true);
+
+// Output again
+print ('nonce=' . $GLOBALS['nonce'] . PHP_EOL);
+print ('found=' . count($GLOBALS['found_hashes'][$GLOBALS['total_blocks']]) . PHP_EOL);
+print ('salt=' . $GLOBALS['salt'] . PHP_EOL);
+print ('difficulty=' . $GLOBALS['difficulty'] . PHP_EOL);
+
+// Start "mining"
+while (true) {
        // Init hash-per-block counter and hashrate
-       $hashesPerBlock = 0;
-       $hashrate = 0;
+       $GLOBALS['hashes_block'] = 0;
+       $hashRate = 1;
 
-       // Wait for BLOCK_SIZE iterations (= found hashes). This is one block
-       $timeBlock = microtime(TRUE);
+       // Wait for block_size iterations (= found hashes). This is one block
+       $timeBlock   = microtime(true);
        $timeDisplay = $timeBlock;
+       $GLOBALS['time_flush'] = $timeBlock;
 
        // Time waited for a good block again (no iteration)
        $timeBadHashes = 0;
 
-       while ($hashesPerBlock <= BLOCK_SIZE) {
+       while (count($GLOBALS['found_hashes'][$GLOBALS['total_blocks']]) <= $GLOBALS['block_size']) {
                // Create hash from modulaHash ("genesis hash") and nonce
-               $nonceHash = doubleHashString($modulaHash . $nonce);
+               $nonceHash = multipleHashString($GLOBALS['nonce'] . $GLOBALS['current_hash']);
 
                // Calculate sums
                $sumNonce  = calculateSumFromHash($nonceHash);
-               $sumModula = calculateSumFromHash($modulaHash);
 
                // Init counter
-               $iter = 0;
-               $iterSecond = 0;
+               $GLOBALS['iteration'] = 0;
+               $GLOBALS['iteration_second'] = 0;
 
                // Now start the "mining" ...
-               $timeHash = microtime(TRUE);
-               while ($sumNonce >= $sumModula) {
+               $timeHash = microtime(true);
+               while ($sumNonce < $GLOBALS['sum_genesis']) {
                        // Calculate new nonce
-                       $nonce = calculateNonce($nonce);
+                       calculateNonce();
 
                        // And hash again
-                       $nonceHash = doubleHashString($modulaHash . $nonce);
+                       $nonceHash = multipleHashString($GLOBALS['nonce'] . $GLOBALS['current_hash']);
 
                        // Calculate sums
                        $sumNonce  = calculateSumFromHash($nonceHash);
-                       //print('hashesPerBlock=' . $hashesPerBlock . PHP_EOL);
 
                        // Time spend in loop
-                       $testTime = abs(microtime(TRUE) - $timeDisplay);
+                       $testTime = abs(microtime(true) - $timeDisplay);
 
                        // Calculate hashrate/sec
-                       $hashrate = 1 / $testTime * $iterSecond * 2;
+                       $hashRate = 1 / $testTime * $GLOBALS['iteration_second'] * $GLOBALS['hash_cycles'];
 
                        // Only every second
                        if ($testTime >= 1) {
                                // Display hash rate
-                               print ('hashesPerBlock=' . $hashesPerBlock . ',hashrate=' . $hashrate . ' hashes/sec.' . PHP_EOL);
+                               print ('hashrate=' . round($hashRate) . ' hashes/sec,iterSecond=' . $GLOBALS['iteration_second'] . ' iterations/sec,difficulty=' . $GLOBALS['difficulty'] . PHP_EOL);
 
                                // Reset timer
-                               $timeDisplay = microtime(TRUE);
-                               $iterSecond  = 0;
+                               $timeDisplay = microtime(true);
+                               $GLOBALS['iteration_second']  = 0;
+                       } // END - if
+
+                       // Time spend from last flush
+                       $testTime = abs(microtime(true) - $GLOBALS['time_flush']);
+
+                       // Only once per 10 seconds
+                       if ($testTime >= $GLOBALS['flush_file_time']) {
+                               // Flush check-point file
+                               flushCheckPointFile($GLOBALS['current_hash']);
+                       } // END - if
+
+                       // Time spend from last found block
+                       $testTime = abs(microtime(true) - $GLOBALS['found_time']);
+
+                       // Is the last found time to far away?
+                       if ($testTime >= $GLOBALS['restart_search_time']) {
+                               // Count up restart and reduce difficulty, but never below 2
+                               $GLOBALS['total_restarts']++;
+                               $GLOBALS['difficulty'] = max(2, ($GLOBALS['difficulty'] / 2));
+
+                               // Output message
+                               print('total_restarts=' . $GLOBALS['total_restarts'] . ' - Restarting ...');
+
+                               // Count all root (genesis) hashes
+                               $rootHashes = [];
+                               foreach ($GLOBALS['found_hashes'] as $block) {
+                                       // "Walk" through all blocks
+                                       foreach ($block as $hash) {
+                                               if (!isset($hash['root_hash'])) {
+                                                       // Bad file
+                                                       die('INCONSISTENCY: hash=' . print_r($hash, true));
+                                               } // END - if
+
+                                               if (isset($rootHashes[$hash['root_hash']])) {
+                                                       // Count up
+                                                       $rootHashes[$hash['root_hash']]++;
+                                               } else {
+                                                       // First entry found
+                                                       $rootHashes[$hash['root_hash']] = 1;
+                                               }
+                                       } // END - foreach
+                               } // END - foreach
+
+                               // Find best root hash
+                               $bestRootHash = '';
+                               $bestRootCount = 0;
+                               foreach ($rootHashes as $hash => $count) {
+                                       // Debug message
+                                       //* NOISY-DEBUG: */ print ('hash=' . $hash . ',count=' . $count . ',bestRootHash=' . $bestRootHash . ',bestRootCount=' . $bestRootCount . PHP_EOL);
+
+                                       // Is a better one found?
+                                       if ($count > $bestRootCount) {
+                                               // Remember it
+                                               $bestRootHash  = $hash;
+                                               $bestRootCount = $count;
+                                       } // END - if
+                               } // END - foreach
+
+                               // Output message
+                               print ('bestRootHash=' . $bestRootHash . ',bestRootCount=' . $bestRootCount . PHP_EOL);
+
+                               // Search for latest best root hash
+                               foreach ($GLOBALS['found_hashes'] as $block) {
+                                       // "Walk" through whole block and search for first appearance of best root hash
+                                       foreach ($block as $idx => $hash) {
+                                               // Is the root hash there?
+                                               if ($hash['root_hash'] == $bestRootHash) {
+                                                       // Set found modula hash as new root and current modula hash
+                                                       $GLOBALS['root_hash']   = $hash['nonce_hash'];
+                                                       setModulaHash($hash['nonce_hash']);
+                                                       print ('idx=' . $idx . ',modulaHash=' . $GLOBALS['root_hash'] . ' - Is now new root hash!' . PHP_EOL);
+
+                                                       // Reset "found time" (when a hash was found)
+                                                       $GLOBALS['found_time'] = microtime(true);
+
+                                                       // Re-initialize nonce
+                                                       initNonce();
+
+                                                       // Abort search
+                                                       break;
+                                               } // END - if
+                                       } // END - for
+                               } // END - foreach
                        } // END - if
 
                        // Next round
-                       $iter++;
-                       $iterSecond++;
-                       //print ('nonce=' . $nonce . ',iter=' . $iter . PHP_EOL);
+                       $GLOBALS['iteration']++;
+                       $GLOBALS['iteration_second']++;
+                       //print ('nonce=' . $GLOBALS['nonce'] . ',iteration=' . $GLOBALS['iteration'] . PHP_EOL);
                        //print ('nonceHash=' . $nonceHash . PHP_EOL);
                        //print ('sumNonce=' . $sumNonce . PHP_EOL);
-                       //print ('sumModula=' . $sumModula . PHP_EOL);
+                       //print ('sumGenesis=' . $GLOBALS['sum_genesis'] . PHP_EOL);
                } // END - while
 
-               // Add amount of hashes to block (double-hash)
-               $hashesPerBlock += $iter * 2 + 2;
-
                // If the iteration is zero, then no hash is found
-               if ($iter == 0) {
-                       // Bad block found
-                       $timeBadHashes += abs(microtime(TRUE) - $timeHash);
+               if ($GLOBALS['iteration'] == 0) {
+                       // Bad hash found
+                       $timeBadHashes += abs(microtime(true) - $timeHash);
 
                        // And next round
-                       //print('bad:nonce=' . $nonce . PHP_EOL);
+                       print('BAD:nonce=' . $GLOBALS['nonce'] . PHP_EOL);
 
                        // Nothing found, so calculate new nonce
-                       $nonce = calculateNonce($nonce);
+                       calculateNonce();
                        continue;
                } // END - if
 
-               // Found hash:
-               //print ('nonceHash=' . $nonceHash .',iter=' . $iter . PHP_EOL);
+               // Add amount of hashes per block (multiple-hash)
+               $GLOBALS['hashes_block'] += $GLOBALS['iteration'] * $GLOBALS['hash_cycles'] + $GLOBALS['hash_cycles'];
 
-               // Use nonceHash as next modula hash
-               $modulaHash = $nonceHash;
+               // Push found hash
+               addFoundHash($nonceHash);
        } // END - while
 
-       // Time taken for one block
-       $timeBlock = abs(microtime(TRUE) - $timeBlock);
-       //print ('calculateSumFromHash(modulaHash)=' . calculateSumFromHash($modulaHash) . PHP_EOL);
-       //print ('calculateSumFromHash(nonceHash)=' . calculateSumFromHash($nonceHash) . PHP_EOL);
+       // Time taken for one
+       $timeBlock = abs(microtime(true) - $timeBlock);
 
        // Calculate reward
-       $reward = abs($timeBlock - $timeBadHashes) / $hashrate * $hashesPerBlock / BLOCK_SIZE * 1000;
-       //print ('timeBlock=' . $timeBlock . ',timeBadHashes=' . $timeBadHashes . ',hashesPerBlock=' . $hashesPerBlock .',reward=' . $reward . PHP_EOL);
+       $reward = abs($timeBlock - $timeBadHashes) / $hashRate * $GLOBALS['hashes_block'] / max(1, $GLOBALS['block_size']) * 1000;
+       print('timeBlock=' . $timeBlock . ',timeBadHashes=' . $timeBadHashes . ',hashesPerBlock=' . $GLOBALS['hashes_block'] .',reward=' . $reward . PHP_EOL);
+
+       // Double difficulty
+       $GLOBALS['difficulty'] = $GLOBALS['difficulty'] * 2;
 
        // Block completed
-       $totalHashes += $hashesPerBlock;
-       $totalBlocks++;
-       $hashesPerBlock = 0;
+       $GLOBALS['total_hashes'] += $GLOBALS['hashes_block'];
+       $GLOBALS['total_blocks']++;
+       $GLOBALS['hashes_block'] = 0;
+
+       // Init next block
+       $GLOBALS['found_hashes'][$GLOBALS['total_blocks']] = [];
 
        // Calculate new nonce
-       $nonce = calculateNonce($nonce);
+       calculateNonce();
 
        // Add reward to total
-       $totalReward += $reward;
+       $GLOBALS['total_reward'] += $reward;
 
        // Calculate average block value
-       $blockValue = $totalReward / $totalBlocks * $totalHashes / (BLOCK_SIZE * $totalBlocks);
+       $blockValue = $GLOBALS['total_reward'] / $GLOBALS['total_blocks'] * $GLOBALS['total_hashes'] / ($GLOBALS['block_size'] * $GLOBALS['total_blocks']);
 
        // Calculate reward per hour (= 3600 seconds)
-       $rewardPerHour = $totalReward / abs(microtime(TRUE) - START_TIME) * 3600;
+       $rewardPerHour = $GLOBALS['total_reward'] / abs(microtime(true) - START_TIME) * 3600;
 
-       print ('totalReward=' . $totalReward . ',blockValue=' . $blockValue . ',rewardPerHour=' . $rewardPerHour . PHP_EOL);
+       print ('totalReward=' . $GLOBALS['total_reward'] . ',blockValue=' . $blockValue . ',rewardPerHour=' . $rewardPerHour . PHP_EOL);
 } // END - while
-
-// [EOF]
-?>