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<script src="https://dglittle.github.io/cdn/utils001.js"></script>
<script src="https://peterolson.github.io/BigInteger.js/BigInteger.min.js"></script>
<body style="margin:0px;padding:0px"></body>
<script>
function create_column_sheet(model) {
model = model || {
headers : ['a', 'b'],
rows : [
[1, 2],
[3, 4]
]
}
function calc() {
each(model.rows, function (r, r_i) {
while (r.length < model.headers.length)
r.push('')
})
each(model.rows, function (r, r_i) {
var o = {}
each(model.headers, function (h, h_i) {
if (h) o[h] = r[h_i]
})
o.row = r
each(model.headers, function (h, h_i) {
if (h && h.startsWith('=')) {
o.left = r[h_i - 1]
with (o) {
model.rows[r_i][h_i] = eval(h.substr(1))
}
}
})
})
}
var d = document.createElement('div')
d.style.display = 'grid'
d.style.width = '100%'
d.style.height = '100%'
d.style.gridGap = '2px'
var cbs = []
function update() {
each(cbs, function (x) { x() })
cbs = []
calc()
d.style['grid-template-columns'] = 'repeat(' + model.headers.length + ', 1fr)'
d.style['grid-template-rows'] = '50px repeat(' + model.rows.length + ', 1fr)'
while (d.firstChild) d.firstChild.remove()
var next_h = model.headers.length
each(model.headers, function (h, h_i) {
var c = make_cell(h, function (x) {
model.headers[h_i] = x
})
c.style.background = 'pink'
d.append(c)
})
each(model.rows, function (r, r_i) {
each(r, function (c, c_i) {
d.append(make_cell(c, function (x) {
model.rows[r_i][c_i] = x
}))
})
})
}
function make_cell(val, cb) {
var d = document.createElement('textarea')
d.style.border = 'none'
d.value = val
cbs.push(function () {
cb(isNaN(d.value) ? d.value : parseFloat(d.value))
})
d.onchange = function () {
update()
}
d.onkeydown = function (e) {
if ((e.shiftKey || e.ctrlKey || e.metaKey) && ((e.keyCode == 83 && !e.shiftKey) || e.keyCode == 13)) {
e.preventDefault()
update()
}
}
return d
}
update()
return d
}
var default_code = "\n$('64', push(64))\n$('0', push(0))\ncalldatacopy($('64'), $('0'), $('0'))\n$('kv', sha3($('64'), $('0')))\n\n$('new_amount', add(sload($('kv')), callvalue()))\nsstore($('new_amount'), $('kv'))\n\n$('k', sha3(push(32), $('0')))\n$('k+1', add($('k'), push(1)))\n\njumpi(gt(sload($('k+1')), $('new_amount')), pushdest('hello'))\nstop()\njumpdest('hello')\n\nsstore($('new_amount'), $('k+1'))\nsstore(calldataload(push(32)), $('k'))\n"
document.body.append(create_column_sheet({
headers : ['code', '=left', '=assemble(left)', '=disassemble(left)'],
rows : [
[default_code, '', '', '']
]
}))
function compile(code) {
var assembly = []
var api = {
add : function (x, y) {
assembly.push('add')
}
}
with (api) {
eval(code)
}
return assembly.join('')
}
function assemble(asm) {
var code_size = 0
var stack_size = 0
var stack_vars = {}
var bytecode = []
var mapy = {}
each(get_opcodes(), function (o) {
mapy[o.asm.toLowerCase()] = function () {
bytecode.push(o.hex)
stack_size += o.outputs - o.inputs
code_size++
}
})
function $(key) {
if (arguments.length > 1)
stack_vars[key] = stack_size
else
mapy['dup' + (stack_size - stack_vars[key] + 1)]()
}
function push(x) {
if (typeof(x) == 'number') {
x = x.toString(16)
if (x.length % 2 == 1) {
x = '0' + x
}
}
mapy['push' + (x.length / 2)]()
bytecode.push(x)
code_size += x.length / 2
}
var labels = {}
var label_refs = []
mapy.jumpdest0 = mapy.jumpdest
mapy.jumpdest = function (label) {
labels[bytecode.length] = label
mapy.jumpdest0()
}
function pushdest(label) {
label_refs.push([label, bytecode.length])
bytecode.push('XX')
stack_size++
code_size++
}
with (mapy) {
eval(asm)
}
var label_bytes = 1
var y = 256
while (code_size + label_bytes * label_refs.length >= y) {
label_bytes++
y *= 256
}
var place_holder = 'XX' + 'XX'.repeat(label_bytes)
for (var i = 0; i < label_refs.length; i++) {
bytecode[label_refs[i][1]] = place_holder
}
var label_locs = {}
code_size = 0
for (var i = 0; i < bytecode.length; i++) {
if (labels[i]) {
label_locs[labels[i]] = code_size
}
code_size += bytecode[i].length/2
}
for (var i = 0; i < label_refs.length; i++) {
var x = label_locs[label_refs[i][0]]
x = x.toString(16)
while (x.length/2 < label_bytes) x = '0' + x
bytecode[label_refs[i][1]] = (0x60 - 1 + label_bytes).toString(16) + x
}
return bytecode.join('')
}
function disassemble(bytecode) {
var mapy = {}
each(get_opcodes(), function (o) {
mapy[o.hex] = o.asm
})
var s = []
for (var i = 0; i < bytecode.length; i += 2) {
var byte = bytecode.slice(i, i + 2)
var code = mapy[byte] || 'i have not seen THAT before..'
s.push((i/2).toString(16) + ' - ' + byte + ' ' + code)
var m = code.match(/PUSH(\d+)/)
if (m) {
s.push(' ' + bytecode.slice(i + 2, i + 2 + 2*m[1]))
i += 2*m[1]
}
s.push('\n')
}
return s.join('')
}
var _2_256 = null
function simulate(bytecode) {
var evm = {
bytecode : bytecode,
pp : 0,
stack : [],
memory : {},
storage : {}
}
}
function get_opcodes() {
return [
{
"hex": "00",
"asm": "STOP",
"inputs": 0,
"outputs": 0,
"gas": 0,
"go": function (evm) {
evm.pp = -1
}
},
{
"hex": "01",
"asm": "ADD",
"inputs": 2,
"outputs": 1,
"gas": 3,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().add(evm.stack.pop()).mod(_2_256))
}
},
{
"hex": "02",
"asm": "MUL",
"inputs": 2,
"outputs": 1,
"gas": 5,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().multiply(evm.stack.pop()).mod(_2_256))
}
},
{
"hex": "03",
"asm": "SUB",
"inputs": 2,
"outputs": 1,
"gas": 3,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().subtract(evm.stack.pop()).mod(_2_256))
}
},
{
"hex": "04",
"asm": "DIV",
"inputs": 2,
"outputs": 1,
"gas": 5,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().divide(evm.stack.pop()).mod(_2_256))
}
},
{
"hex": "05",
"asm": "SDIV",
"inputs": 2,
"outputs": 1,
"gas": 5,
"go" : function () { throw 'bad : not implemented' }
},
{
"hex": "06",
"asm": "MOD",
"inputs": 2,
"outputs": 1,
"gas": 5,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().mod(evm.stack.pop()))
}
},
{
"hex": "07",
"asm": "SMOD",
"inputs": 2,
"outputs": 1,
"gas": 5,
"go" : function () { throw 'bad : not implemented' }
},
{
"hex": "08",
"asm": "ADDMOD",
"inputs": 3,
"outputs": 1,
"gas": 8,
"go": function (evm) {
if (evm.stack.length < 3) throw 'bad'
evm.stack.push(evm.stack.pop().add(evm.stack.pop()).mod(evm.stack.pop()))
}
},
{
"hex": "09",
"asm": "MULMOD",
"inputs": 3,
"outputs": 1,
"gas": 8,
"go": function (evm) {
if (evm.stack.length < 3) throw 'bad'
evm.stack.push(evm.stack.pop().multiply(evm.stack.pop()).mod(evm.stack.pop()))
}
},
{
"hex": "0a",
"asm": "EXP",
"inputs": 2,
"outputs": 1,
"gas": 10,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().modPow(evm.stack.pop(), _2_256))
}
},
{
"hex": "0b",
"asm": "SIGNEXTEND",
"inputs": 2,
"outputs": 1,
"gas": 5,
"go": function (evm) { throw 'bad : not implemented' }
},
{
"hex": "10",
"asm": "LT",
"inputs": 2,
"outputs": 1,
"gas": 3,
"go": function (evm) {
if (evm.stack.length < 2) throw 'bad'
evm.stack.push(evm.stack.pop().lt(evm.stack.pop()) ? bigInt.one : bigInt.zero)
}
},
{
"hex": "11",
"asm": "GT",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "12",
"asm": "SLT",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "13",
"asm": "SGT",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "14",
"asm": "EQ",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "15",
"asm": "ISZERO",
"inputs": 1,
"outputs": 1,
"gas": 3
},
{
"hex": "16",
"asm": "AND",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "17",
"asm": "OR",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "18",
"asm": "XOR",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "19",
"asm": "NOT",
"inputs": 1,
"outputs": 1,
"gas": 3
},
{
"hex": "1a",
"asm": "BYTE",
"inputs": 2,
"outputs": 1,
"gas": 3
},
{
"hex": "20",
"asm": "SHA3",
"inputs": 2,
"outputs": 1,
"gas": 30
},
{
"hex": "30",
"asm": "ADDRESS",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "31",
"asm": "BALANCE",
"inputs": 1,
"outputs": 1,
"gas": 20
},
{
"hex": "32",
"asm": "ORIGIN",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "33",
"asm": "CALLER",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "34",
"asm": "CALLVALUE",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "35",
"asm": "CALLDATALOAD",
"inputs": 1,
"outputs": 1,
"gas": 3
},
{
"hex": "36",
"asm": "CALLDATASIZE",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "37",
"asm": "CALLDATACOPY",
"inputs": 3,
"outputs": 0,
"gas": 3
},
{
"hex": "38",
"asm": "CODESIZE",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "39",
"asm": "CODECOPY",
"inputs": 3,
"outputs": 0,
"gas": 3
},
{
"hex": "3a",
"asm": "GASPRICE",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "3b",
"asm": "EXTCODESIZE",
"inputs": 1,
"outputs": 1,
"gas": 20
},
{
"hex": "3c",
"asm": "EXTCODECOPY",
"inputs": 4,
"outputs": 0,
"gas": 20
},
{
"hex": "40",
"asm": "BLOCKHASH",
"inputs": 1,
"outputs": 1,
"gas": 20
},
{
"hex": "41",
"asm": "COINBASE",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "42",
"asm": "TIMESTAMP",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "43",
"asm": "NUMBER",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "44",
"asm": "DIFFICULTY",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "45",
"asm": "GASLIMIT",
"inputs": 0,
"outputs": 1,
"gas": 2
},
{
"hex": "50",
"asm": "POP",
"inputs": 1,
"outputs": 0,
"gas": 2
},
{
"hex": "51",
"asm": "MLOAD",
"inputs": 1,
"outputs": 1,
"gas": 3
},
{
"hex": "52",
"asm": "MSTORE",
"inputs": 2,
"outputs": 0,
"gas": 3
},
{
"hex": "53",
"asm": "MSTORE8",
"inputs": 2,
"outputs": 0,
"gas": 3
},
{
"hex": "54",
"asm": "SLOAD",
"inputs": 1,
"outputs": 1,
"gas": 50
},
{
"hex": "55",
"asm": "SSTORE",
"inputs": 2,
"outputs": 0,
"gas": 0
},
{
"hex": "56",
"asm": "JUMP",
"inputs": 1,
"outputs": 0,
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