├── .gitignore ├── index.html ├── jquery-1.5.2.min.js ├── miner.js ├── readme.md ├── sha256.js └── work-manager.js /.gitignore: -------------------------------------------------------------------------------- 1 | *~ 2 | *.swp 3 | -------------------------------------------------------------------------------- /index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
Total Hashes: 12 |
Hash/s: 13 |
Golden Ticket: 14 |
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";d.extend(b.style,{position:"absolute",top:0,left:0,margin:0,border:0,width:"1px",height:"1px",visibility:"hidden"}),b.innerHTML=j,a.insertBefore(b,a.firstChild),e=b.firstChild,f=e.firstChild,h=e.nextSibling.firstChild.firstChild,this.doesNotAddBorder=f.offsetTop!==5,this.doesAddBorderForTableAndCells=h.offsetTop===5,f.style.position="fixed",f.style.top="20px",this.supportsFixedPosition=f.offsetTop===20||f.offsetTop===15,f.style.position=f.style.top="",e.style.overflow="hidden",e.style.position="relative",this.subtractsBorderForOverflowNotVisible=f.offsetTop===-5,this.doesNotIncludeMarginInBodyOffset=a.offsetTop!==i,a.removeChild(b),d.offset.initialize=d.noop},bodyOffset:function(a){var b=a.offsetTop,c=a.offsetLeft;d.offset.initialize(),d.offset.doesNotIncludeMarginInBodyOffset&&(b+=parseFloat(d.css(a,"marginTop"))||0,c+=parseFloat(d.css(a,"marginLeft"))||0);return{top:b,left:c}},setOffset:function(a,b,c){var e=d.css(a,"position");e==="static"&&(a.style.position="relative");var f=d(a),g=f.offset(),h=d.css(a,"top"),i=d.css(a,"left"),j=(e==="absolute"||e==="fixed")&&d.inArray("auto",[h,i])>-1,k={},l={},m,n;j&&(l=f.position()),m=j?l.top:parseInt(h,10)||0,n=j?l.left:parseInt(i,10)||0,d.isFunction(b)&&(b=b.call(a,c,g)),b.top!=null&&(k.top=b.top-g.top+m),b.left!=null&&(k.left=b.left-g.left+n),"using"in b?b.using.call(a,k):f.css(k)}},d.fn.extend({position:function(){if(!this[0])return null;var a=this[0],b=this.offsetParent(),c=this.offset(),e=ch.test(b[0].nodeName)?{top:0,left:0}:b.offset();c.top-=parseFloat(d.css(a,"marginTop"))||0,c.left-=parseFloat(d.css(a,"marginLeft"))||0,e.top+=parseFloat(d.css(b[0],"borderTopWidth"))||0,e.left+=parseFloat(d.css(b[0],"borderLeftWidth"))||0;return{top:c.top-e.top,left:c.left-e.left}},offsetParent:function(){return this.map(function(){var a=this.offsetParent||c.body;while(a&&(!ch.test(a.nodeName)&&d.css(a,"position")==="static"))a=a.offsetParent;return a})}}),d.each(["Left","Top"],function(a,c){var e="scroll"+c;d.fn[e]=function(c){var f=this[0],g;if(!f)return null;if(c!==b)return this.each(function(){g=ci(this),g?g.scrollTo(a?d(g).scrollLeft():c,a?c:d(g).scrollTop()):this[e]=c});g=ci(f);return g?"pageXOffset"in g?g[a?"pageYOffset":"pageXOffset"]:d.support.boxModel&&g.document.documentElement[e]||g.document.body[e]:f[e]}}),d.each(["Height","Width"],function(a,c){var e=c.toLowerCase();d.fn["inner"+c]=function(){return this[0]?parseFloat(d.css(this[0],e,"padding")):null},d.fn["outer"+c]=function(a){return this[0]?parseFloat(d.css(this[0],e,a?"margin":"border")):null},d.fn[e]=function(a){var f=this[0];if(!f)return a==null?null:this;if(d.isFunction(a))return this.each(function(b){var c=d(this);c[e](a.call(this,b,c[e]()))});if(d.isWindow(f)){var g=f.document.documentElement["client"+c];return f.document.compatMode==="CSS1Compat"&&g||f.document.body["client"+c]||g}if(f.nodeType===9)return Math.max(f.documentElement["client"+c],f.body["scroll"+c],f.documentElement["scroll"+c],f.body["offset"+c],f.documentElement["offset"+c]);if(a===b){var h=d.css(f,e),i=parseFloat(h);return d.isNaN(i)?h:i}return this.css(e,typeof a==="string"?a:a+"px")}}),a.jQuery=a.$=d})(window); -------------------------------------------------------------------------------- /miner.js: -------------------------------------------------------------------------------- 1 | // For fun, and useful reference, this code often uses 2 | // strange verbage. Here is a reference: 3 | // 4 | // Golden Hash - A final SHA-256 hash which is less than the getwork Target. 5 | // Golden Ticket - The nonce that gave rise to a Golden Hash. 6 | // 7 | // This is in reference to the classic story of Willy Wonka and the Chocolate Factory. 8 | 9 | 10 | var TotalHashes = 0; 11 | 12 | importScripts('sha256.js'); 13 | 14 | // Function: scanhash 15 | // 16 | // This function attempts to find a Golden Ticket for the 17 | // given parameters. 18 | // 19 | // All of the arguments for this function can be supplied 20 | // by a Bitcoin getwork request. 21 | // 22 | // midstate is 256-bits: Array of 8, 32-bit numbers 23 | // data is 512-bits: Array of 16, 32-bit numbers 24 | // hash1 is 256-bits: Array of 8, 32-bit numbers 25 | // target is 256-bits: Array of 8, 32-bit numbers 26 | // 27 | // Returns a Golden Ticket (32-bit number) or false 28 | function scanhash(midstate, data, hash1, target, progress_report) 29 | { 30 | // Nonce is a number which starts at 0 and increments until 0xFFFFFFFF 31 | var nonce = 0; 32 | 33 | while(true) { 34 | // The nonce goes into the 4th 32-bit word 35 | data[4] = nonce; 36 | 37 | // Now let us see if this nonce results in a Golden Hash 38 | var hash = sha256_chunk(midstate, data); 39 | hash = sha256_chunk(SHA_256_INITIAL_STATE, hash.concat(hash1)); 40 | 41 | TotalHashes++; 42 | 43 | if (is_golden_hash(hash, target)) { 44 | // I've got a Golden Ticket!!! 45 | // How many Bitcoins for the Geese? 46 | 47 | // The current nonce is thus a Golden Ticket 48 | return nonce; 49 | } 50 | 51 | 52 | if (nonce % 10000 == 0) 53 | progress_report(); 54 | 55 | 56 | // If this was the last possible nonce, quit 57 | if (nonce == 0xFFFFFFFF) 58 | break; 59 | 60 | // Increment nonce 61 | nonce = safe_add(nonce, 1); 62 | } 63 | 64 | return false; 65 | } 66 | 67 | 68 | // Tests if a given hash is a less than or equal to the given target. 69 | // NOTE: For Simplicity this just checks that the highest 32-bit word is 0x00000000 70 | // TODO: Do a full comparison 71 | // 72 | // hash is 256-bits: Array of 8, 32-bit numbers 73 | // target is 256-bits: Array of 8, 32-bit numbers 74 | // Returns Boolean 75 | function is_golden_hash(hash, target) 76 | { 77 | return hash[7] == 0x00000000; 78 | } 79 | 80 | 81 | 82 | ///// Web Worker ///// 83 | 84 | onmessage = function(event) { 85 | var job = event.data; 86 | job.golden_ticket = false; 87 | 88 | sendProgressUpdate(job); 89 | 90 | // Send occasional progress updates 91 | //setInterval(function() { sendProgressUpdate(job); }, 10000); 92 | 93 | 94 | // Begin scanning 95 | var golden_ticket = scanhash(event.data.midstate, event.data.data, event.data.hash1, event.data.target, 96 | function() { sendProgressUpdate(job); }); 97 | 98 | // Scanning compelted. Send back the results 99 | job.golden_ticket = golden_ticket; 100 | postMessage(job); 101 | }; 102 | 103 | function sendProgressUpdate(job) 104 | { 105 | job.total_hashes = TotalHashes; 106 | 107 | postMessage(job); 108 | } 109 | 110 | 111 | -------------------------------------------------------------------------------- /readme.md: -------------------------------------------------------------------------------- 1 | Bitcoin JavaScript Miner 2 | ======================== 3 | 4 | **Current Status**: Pre-Alpha 5 | 6 | 7 | What is it? 8 | ----------- 9 | 10 | This is a Bitcoin Miner implemented in JavaScript. It is intended for use 11 | in a [Bitcoin Mining Pool](https://en.bitcoin.it/wiki/Pooled_mining), but 12 | its main purpose is to act as a learning tool. Feel free to browse the commented source-code 13 | and learn more about how Bitcoins are mined. 14 | 15 | [Learn more about Bitcoin](http://www.bitcoin.org/ "Bitcoin") 16 | 17 | 18 | How do I use it? 19 | ---------------- 20 | 21 | Download the full source code and upload it to any webserver. You can then 22 | access the index.html file and begin mining! 23 | 24 | 25 | Does It Really Mine Bitcoins? 26 | ----------------------------- 27 | 28 | Not currently, no. The code is incomplete, and does not communicate with a real 29 | mining pool. I intend to add that functionality, if possible, but it is not complete 30 | yet. 31 | 32 | When it *is* complete, it won't be very good at mining! It operates much slower 33 | than even a standard CPU miner, and so it is unlikely to generate much income. 34 | 35 | 36 | 37 | Current Development Status 38 | -------------------------- 39 | 40 | JsMiner is currently just an educational tool, and has not been tested on a live 41 | mining pool; nor has it been tested for 100% correct operation. 42 | 43 | As time allows, I will strive to complete the code so that it works with an 44 | actual mining pool. 45 | 46 | 47 | 48 | File Desctriptions 49 | ------------------ 50 | 51 | This is a list of the files and what they do: 52 | 53 | * **index.html** - The webpage for JsMiner. Provides an interface to start the mining process and view mining statistics. 54 | * **miner.js** - This is where the Bitcoin Mining is done. It is invoked as a Web Worker (JavaScript thread). 55 | * **sha256.js** - SHA-256 functions implemented in JavaScript. 56 | * **work-manager.js** - Code to getwork, submitwork, and manage the Miner threads. 57 | 58 | 59 | 60 | Thank You 61 | --------- 62 | 63 | If you like this project, feel free contribute code, comments, and even Bitcoin donations. 64 | 65 | *Donation Address*: 16TUsJ6ToAxp1a9RmTCGnox99MocGSYLaD 66 | 67 | -------------------------------------------------------------------------------- /sha256.js: -------------------------------------------------------------------------------- 1 | /** 2 | * 3 | * Secure Hash Algorithm (SHA256) 4 | * 5 | * Original code by Angel Marin, Paul Johnston of 6 | * 7 | * http://www.webtoolkit.info/ 8 | * 9 | * Modified for simplicity in Bitcoin Mining. 10 | * Only provides a function for the SHA-256 Chunk processing. 11 | * 12 | * i.e. SHA-256 pre-processes a string, and then runs chunk 13 | * processing on 512-bit chunks of the pre-processed string. 14 | * 15 | * This code only contains the chunk processing, which 16 | * is the only part needed for Bitcoin Mining. 17 | * 18 | **/ 19 | 20 | var SHA_256_INITIAL_STATE = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19); 21 | 22 | // 32-bit Modular Binary Addition, JavaScript style 23 | // because JavaScript would do weird things if you 24 | // tried to just add the numbers. 25 | function safe_add (x, y) { 26 | var lsw = (x & 0xFFFF) + (y & 0xFFFF); 27 | var msw = (x >> 16) + (y >> 16) + (lsw >> 16); 28 | return (msw << 16) | (lsw & 0xFFFF); 29 | } 30 | 31 | 32 | 33 | // state is the 256-bit input state: Array of 8, 32-bit numbers 34 | // data is the 512-bit chunk: Array of 16, 32-bit numbers 35 | // Returns a 256-bit (partial) hash: Array of 8, 32-bit numbers 36 | // 37 | // NOTE: If you are using this to understand SHA-256, skip the first parts of this 38 | // function, which just create helper functions. 39 | function sha256_chunk(state, data) 40 | { 41 | // SHA-256 Round Constants 42 | var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2); 43 | 44 | 45 | ///////////////////////////////////////////////////// 46 | // HELPER FUNCTIONS 47 | ///////////////////////////////////////////////////// 48 | 49 | 50 | //// Binary Helper Functions 51 | // Binary Right Rotate 52 | function S (X, n) { return ( X >>> n ) | (X << (32 - n)); } 53 | 54 | // Binary Right Shift 55 | function R (X, n) { return ( X >>> n ); } 56 | 57 | //// Binary functions unique to SHA-256 58 | // These are used in the calculation of T1 59 | function Ch(x, y, z) { return ((x & y) ^ ((~x) & z)); } 60 | function Sigma1(x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); } 61 | 62 | // These are used in the calculation of T2 63 | function Maj(x, y, z) { return ((x & y) ^ (x & z) ^ (y & z)); } 64 | function Sigma0(x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); } 65 | 66 | // These are used in the calculation of W 67 | function Gamma0(x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); } 68 | function Gamma1(x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); } 69 | 70 | 71 | ///////////////////////////////////////////////////// 72 | // THIS IS WHERE THE FUN STARTS 73 | // for anyone wanting to learn the SHA-256 Algorithm 74 | // start reading here, and reference the above as 75 | // needed. 76 | ///////////////////////////////////////////////////// 77 | 78 | var W = new Array(64); 79 | var a, b, c, d, e, f, g, h, i, j; 80 | 81 | // Assign the state to named variables for clarity 82 | a = state[0]; 83 | b = state[1]; 84 | c = state[2]; 85 | d = state[3]; 86 | e = state[4]; 87 | f = state[5]; 88 | g = state[6]; 89 | h = state[7]; 90 | 91 | // Calculate the W values, which are based on the 512-bit input data. 92 | for (var i = 0; i < 64; ++i) { 93 | // For the first 16 rounds, use the raw input data as w 94 | if (i < 16) 95 | W[i] = data[i]; 96 | else { 97 | var s0 = Gamma0(W[i-15]); 98 | var s1 = Gamma1(W[i-2]); 99 | // W[i] = W[i-16] + s0 + W[i-7] + s1 100 | W[i] = safe_add(safe_add(safe_add(W[i-16], s0), W[i-7]), s1); 101 | } 102 | } 103 | 104 | // Now perform 64 rounds of SHA-256 105 | for (var i = 0; i < 64; ++i) { 106 | var s0 = Sigma0(a); 107 | var maj = Maj(a, b, c); 108 | // t2 = s0 + maj 109 | var t2 = safe_add(s0, maj); 110 | var s1 = Sigma1(e); 111 | var ch = Ch(e, f, g); 112 | // var t1 = h + s1 + ch + K[i] + W[i] 113 | var t1 = safe_add(safe_add(safe_add(safe_add(h, s1), ch), K[i]), W[i]); 114 | 115 | // Shift the state and add t1 and t2 116 | h = g; 117 | g = f; 118 | f = e; 119 | e = safe_add(d, t1); // e = d + t1 120 | d = c; 121 | c = b; 122 | b = a; 123 | a = safe_add(t1, t2); // a = t1 + t2 124 | } 125 | 126 | // Now, as a final step, we add our result back into 127 | // the input state. 128 | a = safe_add(state[0], a); 129 | b = safe_add(state[0], b); 130 | c = safe_add(state[0], c); 131 | d = safe_add(state[0], d); 132 | e = safe_add(state[0], e); 133 | f = safe_add(state[0], f); 134 | g = safe_add(state[0], g); 135 | h = safe_add(state[0], h); 136 | 137 | return new Array(a, b, c, d, e, f, g, h); 138 | } 139 | 140 | 141 | -------------------------------------------------------------------------------- /work-manager.js: -------------------------------------------------------------------------------- 1 | function begin_mining() 2 | { 3 | var job = get_work(); 4 | job.start_date = new Date().getTime(); 5 | 6 | var worker = new Worker("miner.js"); 7 | worker.onmessage = onWorkerMessage; 8 | worker.onerror = onWorkerError; 9 | worker.postMessage(job); 10 | } 11 | 12 | function onWorkerMessage(event) { 13 | var job = event.data; 14 | 15 | // We've got a Golden Ticket!!! 16 | if(job.golden_ticket !== false) { 17 | $('#golden-ticket').val(job.golden_ticket); 18 | 19 | // TODO: Submit Work 20 | } 21 | else { 22 | // :'( it was just an update 23 | var total_time = (new Date().getTime()) - job.start_date; 24 | var hashes_per_second = job.total_hashes * 1000 / total_time; 25 | $('#total-hashes').val(job.total_hashes); 26 | $('#hashes-per-second').val(hashes_per_second); 27 | } 28 | } 29 | 30 | function onWorkerError(event) { 31 | throw event.data; 32 | } 33 | 34 | 35 | function get_work() 36 | { 37 | var workrequest = "{\"method\": \"getwork\", \"params\": \[\], \"id\":0}\r\n"; 38 | var response = "{\"result\":{\"midstate\":\"fd8c924ed9a07c7d6dd49c1079429142d94cf99d6bb978e123190d5 39 | 2fbf8ef6f\",\"data\":\"0000000116237c0c0d1baffc50d4bf2a19bf5bc6fbf381c26bac4a0a0000db4\ 40 | 0000000008108b0619305607e7f04634ffe7ef35294970d5656694c6b7a0ef3b07b87e9ac4d8d90321b00\ 41 | f3390000000000000080000000000000000000000000000000000000000000000000000000000000000000\ 42 | 0000000000000080020000\",\"hash1\":\"000000000000000000000000000000000000\ 43 | 00000000000000000000000000000000008000000000000000000000000000000000000000000000\ 44 | 000000010000\",\"target\":\"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF\ 45 | 00000000\"},\"error\":null,\"id\":0}"; 46 | 47 | var response = JSON.parse(response) 48 | var job = {}; 49 | 50 | job.midstate = hexstring_to_binary(response.result.midstate); 51 | job.data = hexstring_to_binary(response.result.data); 52 | job.hash1 = hexstring_to_binary(response.result.hash1); 53 | job.target = hexstring_to_binary(response.result.target); 54 | 55 | // Remove the first 512-bits of data, since they aren't used 56 | // in calculating hashes. 57 | job.data = job.data.slice(16); 58 | 59 | return job 60 | } 61 | 62 | // Given a hex string, returns an array of 32-bit integers 63 | // Data is assumed to be stored least-significant byte first (in the string) 64 | function hexstring_to_binary(str) 65 | { 66 | var result = new Array(); 67 | 68 | for(var i = 0; i < str.length; i += 8) { 69 | var number = 0x00000000; 70 | 71 | for(var j = 0; j < 4; ++j) { 72 | number = safe_add(number, hex_to_byte(str.substring(i + j*2, i + j*2 + 2)) << (j*8)); 73 | } 74 | 75 | result.push(number); 76 | } 77 | 78 | return result; 79 | } 80 | 81 | function hex_to_byte(hex) 82 | { 83 | return( parseInt(hex, 16)); 84 | } 85 | 86 | 87 | 88 | --------------------------------------------------------------------------------