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utils.js
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utils.js
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// system
assert = require('assert')
fs = require('fs')
http = require('http')
os = require('os')
ws = require('ws')
opn = require('./lib/opn')
// crypto
crypto = require('crypto')
// scrypt = require('scrypt') // require('./scrypt_'+os.platform())
keccak = require('keccak')
nacl = require('./lib/nacl')
ec = (a, b) => bin(nacl.sign.detached(a, b))
ec.verify = nacl.sign.detached.verify
// encoders
BN = require('bn.js')
stringify = require('./lib/stringify')
rlp = require('rlp')
Sequelize = require('sequelize')
Op = Sequelize.Op
Me = require('./src/me').Me
// globals
K = false
me = false
Members = false
// Private Key value
PK = {}
RPC = {
internal_rpc: require('./src/internal_rpc'),
external_rpc: require('./src/external_rpc')
}
l = console.log
r = function (a) {
if (a instanceof Buffer) {
return rlp.decode(a)
} else {
return rlp.encode(a)
}
}
localhost = '127.0.0.1'
readInt = (i) => i.length > 0 ? i.readUIntBE(0, i.length) : 0
toHex = (inp) => Buffer.from(inp).toString('hex')
bin = (data) => Buffer.from(data)
sha3 = (a) => keccak('keccak256').update(bin(a)).digest()
// TODO: not proper alg
kmac = (key, msg) => keccak('keccak256').update(key).update(bin(msg)).digest()
ts = () => Math.round(new Date() / 1000)
afterFees = (amount) => {
var fee = Math.round(amount * K.hub_fee)
if (fee == 0) fee = K.hub_fee_base
return amount - fee
}
parse = (json) => {
try {
var o = JSON.parse(json)
if (o && typeof o === 'object') {
return o
}
} catch (e) {
return {}
}
}
commy = (b, dot = true) => {
let prefix = b < 0 ? '-' : ''
b = Math.abs(b).toString()
if (dot) {
if (b.length == 1) {
b = '0.0' + b
} else if (b.length == 2) {
b = '0.' + b
} else {
var insert_dot_at = b.length - 2
b = b.slice(0, insert_dot_at) + '.' + b.slice(insert_dot_at)
}
}
return prefix + b.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
}
// trick to pack signed int into unsigned int
packSInt = (num) => (Math.abs(num) * 2) + (num < 0 ? 1 : 0)
readSInt = (num) => {
num = readInt(num)
return (num % 2 == 1 ? -(num - 1) / 2 : num / 2)
}
concat = function () {
return Buffer.concat(Object.values(arguments))
}
process.title = 'Failsafe'
usage = () => {
return Object.assign(process.cpuUsage(), process.memoryUsage(), {uptime: process.uptime()})
}
// tells external RPC how to parse this request (256 options)
inputMap = (i) => {
var map = [
'auth', // this socket belongs to my pubkey
// consensus
'needSig', // member needs sig of others
'signed', // other members return sigs of block
'tx', // propose array of tx to add to block
'sync', // i want to sync since this prev_hash
'chain', // return X blocks since given prev_hash
'update', // new input to state machine
'requestWithdraw',
'withdrawal',
'ack',
'setLimits',
'testnet'
]
if (typeof i === 'string') {
// buffer friendly
return Buffer([map.indexOf(i)])
} else {
return map[i]
}
}
// enumerator of all methods and tx types in the system
methodMap = (i) => {
var map = [
'placeholder',
'block',
'rebalance',
'propose',
'vote',
'withdrawal', // instant off-chain signature to withdraw from mutual payment channel
'offdelta', // delayed balance proof
'dispute',
'update', // transitions to state machine + new sig
'unlockedPayment', // pay without hashlock
'ack',
'setLimits',
'auth' // any kind of off-chain auth signatures between peers
]
if (typeof i === 'string') {
if (map.indexOf(i) == -1) throw 'No such method'
return map.indexOf(i)
} else {
return map[i]
}
}
allowedOnchain = [
'rebalance',
'dispute',
'propose',
'vote'
]