-
Notifications
You must be signed in to change notification settings - Fork 18
/
Copy pathtransaction.html
216 lines (195 loc) · 6.85 KB
/
transaction.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
<html>
<head>
<title>How bitcoin transactions are structured</title>
<style>
.w50 { width:100px; display: inline-block; }
</style>
<meta charset=utf-8 />
<meta http-equiv=“Pragma” content=”no-cache”>
<meta http-equiv=“Expires” content=”-1″>
<meta http-equiv=“CACHE-CONTROL” content=”NO-CACHE”>
<meta name="keywords" content="bitcoin,example">
<meta name="author" content="Willem Hengeveld, itsme@xs4all.nl">
<meta name="description" content="How bitcoin transactions are structured.">
<style>
span.clickable { color: blue; text-decoration: underline; cursor: pointer; }
span.clickablehex { color: blue; text-decoration: underline; cursor: pointer; font-family: monospace; background-color: #f4f4f4; }
span.leafnode { color: green; }
</style>
<script src="bignum.js"></script>
<script src="primes.js"></script>
<script src="gfp.js"></script>
<script src="ec.js"></script>
<script src="ecdsa.js"></script>
<script src="utils.js"></script>
<script src="bitcoinio.js"></script>
<script src="transaction.js"></script>
<script src="jsutils.js"></script>
<script language=javascript>
'use strict';
function setvalue(base, id, value)
{
var av = base.querySelector("#"+id);
av.value = value;
av.innerHTML = value;
}
function getvalue(base, id)
{
var av = base.querySelector("#"+id);
return av.value;
}
function start()
{
var tab = document.getElementById("transaction");
//setvalue(tab, "txnid", "19d66411a5aa716a04b37197c11c93c9446a54694a2d2302093d8b0a93ed5d83");
setvalue(tab, "txnid", "7d4036dbc43e3b785cabb22413b67ee6c8a7375ec316c226c29eb10915647988");
}
function loadtxns()
{
var tab = document.getElementById("transaction");
for (var txnid of getvalue(tab, "txnid").split(" ")) {
fetch_and_loadtxn(txnid);
}
}
function fetch_and_loadtxn(txnid)
{
// note problem with bitcoin.com: it is hours behind, this is why i use the blockchair api.
fetch("https://api.blockchair.com/bitcoin/raw/transaction/"+txnid).then(r => r.json()).then(r => {
const raw = Object.values(r.data)[0].raw_transaction;
fetch("https://api.blockchair.com/bitcoin/dashboards/transaction/"+txnid).then(r => r.json()).then(r => {
const info = Object.values(r.data)[0].transaction;
hexdumptxn(info, raw)
});
});
}
function annotatetxns()
{
var tab = document.getElementById("transaction");
for (var txnid of getvalue(tab, "txnid").split(" ")) {
fetch_and_annotatetxn(txnid);
}
}
function fetch_and_annotatetxn(txnid)
{
fetch("https://api.blockchair.com/bitcoin/raw/transaction/"+txnid).then(r => r.json()).then(r => {
const raw = Object.values(r.data)[0].raw_transaction;
fetch("https://api.blockchair.com/bitcoin/dashboards/transaction/"+txnid).then(r => r.json()).then(r => {
const info = Object.values(r.data)[0].transaction;
annotatetxn(info, raw)
});
});
}
function makerow(line)
{
var tr = el('tr');
for (var e of line)
tr.append(el('td', el('code', e)));
return tr;
}
function maketxnid(txnhash)
{
var id = "";
for (var i=0 ; i<64 ; i+=2)
id += txnhash.slice(62-i, 64-i);
return id;
}
function makeinputrow(line)
{
var tr = el('tr');
tr.append(el('td', el('code', "\t")));
var hexline = line[1];
var txnid = maketxnid(hexline.slice(0,64));
var txncode = el('span', hexline.slice(0,64), {class:'clickablehex'});
txncode.addEventListener('click', () => { fetch_and_loadtxn(txnid); });
var txnrest = el('code', hexline.slice(64));
tr.append(el('td', txncode, txnrest));
return tr;
}
function hexdumptxn(info, hex)
{
var r = new BitcoinReader(hextobytes(hex));
var t = new Transaction(r);
var tab = document.getElementById("hexdump");
tab.append(el('tr', el('td', el('hr'), {colspan:2})));
tab.append(el('tr', el('td', el('span', "txn hexdump "+info.hash+" block:"+info.block_id+" "+info.time), {colspan:2})));
var isin = false;
for (var line of t.hexdump()) {
if (line.find(a=>a.includes("nr inputs")))
isin = true;
else if (line.find(a=>a.includes("nr outputs")))
isin = false;
if (isin && line[0]=="\t")
tab.append(makeinputrow(line));
else
tab.append(makerow(line));
}
}
function insertAfter(newNode, existingNode) {
existingNode.parentNode.insertBefore(newNode, existingNode.nextSibling);
existingNode.collapsed = false;
}
function removeNext(node) {
node.parentNode.removeChild(node.nextSibling);
node.collapsed = true;
}
function makeannotated(children)
{
var dl = el('dl');
for (var ch of children) {
var dt = el('dt', el('span', ch.tagName, {class:ch.children.length?'clickable':'leafnode'}), ' ', el('code', ch.textContent));
dt.collapsed = true;
if (ch.children.length) {
dt.subchildren = ch.children;
dt.addEventListener('click', (ev) => {
var node = ev.target;
while (node && node.tagName != 'DT')
node = node.parentNode;
console.log("ev.t.c", ev, node, node.collapsed);
if (node.collapsed)
insertAfter(el('dd', makeannotated(node.subchildren)), node);
else
removeNext(node);
});
}
dl.append(dt);
}
return dl;
}
function annotatetxn(info, hex)
{
var r = new BitcoinReader(hextobytes(hex));
var t = new Transaction(r);
var tab = document.getElementById("hexdump");
tab.append(el('tr', el('td', el('hr'), {colspan:2})));
tab.append(el('tr', el('td', el('span', "txn hexdump "+info.hash+" block:"+info.block_id+" "+info.time), {colspan:2})));
var parser = new DOMParser();
var xml = parser.parseFromString(t.annotate(), "text/xml");
tab.append(el('tr', el('td', makeannotated(xml.firstChild.children), {colspan:2})));
}
</script>
</head>
<body onLoad="start()">
Menu:
<a href="ecdsacrack.html">crack demo</a>
<a href="linearequations.html">using linear algebra</a>
<a href="calculator.html">curve calculator</a>
<a href="curve.html">curve demo</a>
<a href="transaction.html">bitcoin transaction</a>
<a href="unittest.html">unittest</a><br>
Author: Willem Hengeveld, <a href="mailto:itsme@xs4all.nl">itsme@xs4all.nl</a>,
Source: <a href="https://github.com/nlitsme/bitcoinexplainer">on github</a>.
<p>
This demonstrates how bitcoin transactions are structured.<br>
In the hexdump, you can click on the input txn to follow the chain to the corresponding output.<br>
In the annotated view, you can click on items to expand them.
<table id=transaction>
<tr>
<td>txn: <input size=64 id='txnid'></td>
<td><button onclick='loadtxns(this)'>Hexdump</button>
<td><button onclick='annotatetxns(this)'>Annotate</button>
</tr>
</table>
<table id=hexdump>
</table>
</body>
</html>