gregorynicholas

Using the Compound API

UPDATE

The Compound cToken API now returns the values for you. See comp_borrow_apy and comp_supply_apy when requesting https://api.compound.finance/api/v2/ctoken

OLD METHOD:

1. Pick a supported cToken and its underlying asset
2. Query https://api.compound.finance/api/v2/governance/comp
3. Take the value for supplier_daily_comp or borrower_daily_comp

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Net APY Calculation

1. Convert all supplied and borrowed asset amounts to a single asset (like USD or ETH).
2. Calculate the sum of (suppliedAmount * supplyApyAsDecimal - borrowedAmount * borrowApyAsDecimal) for all underlying assets.
3. If the calculated sum from the previous step is >0 then Net APY = 100 * (sum / totalSuppliedValue). If the calculation from the previous step is <0 then Net APY = 100 * (sum / totalBorrowedValue). If the calculation from the previous step is 0 then Net APY = 0.

Example

Net APY:

• -7.29%

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// Based on https://github.com/ethereum/EIPs/blob/master/assets/eip-712/Example.js

const ethers = require('ethers');

function abiRawEncode(encTypes, encValues) {
  const hexStr = ethers.utils.defaultAbiCoder.encode(encTypes, encValues);
  return Buffer.from(hexStr.slice(2, hexStr.length), 'hex');
}

function keccak256(arg) {

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Enable macOS Server Performance Mode

Performance mode changes the system parameters of your Mac. These changes take better advantage of your hardware for demanding server applications.

A Mac with macOS Server that needs to run high-performance services can turn on performance mode to dedicate additional system resources for server applications. Note, however, that performance mode can be enabled even without macOS Server being installed to achieve similar benifits for other high-performance services.

sudo nvram boot-args="serverperfmode=1 $(nvram boot-args 2>/dev/null | cut -f 2-)"
sudo reboot

Reference: https://support.apple.com/en-us/HT202528.

gregorynicholas

#!/usr/bin/env bash

. paver_autocomplete
. fabric_autocomplete

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p – balanced for paragraphs or body copy

t – balanced for headlines or titles

Arial, “Helvetica Neue”, Helvetica, sans-serif - p, t

Baskerville, “Times New Roman”, Times, serif - p
Baskerville, Times, “Times New Roman”, serif - t

Cambria, Georgia, Times, “Times New Roman”, serif - p, t

“Century Gothic”, “Apple Gothic”, sans-serif - p, t

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#!/bin/bash

####################################
# Config
##################

HTTPROBE_CONCURRENCY=100
HTTPROBE_TIMEOUT=3000

DIRSEARCH_THREADS=50

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Cyclic Rotation - Array

An array A consisting of N integers is given. Rotation of the array means that each element is shifted right by one index, and the last element of the array is moved to the first place. For example, the rotation of array A = [3, 8, 9, 7, 6] is [6, 3, 8, 9, 7] (elements are shifted right by one index and 6 is moved to the first place).

The goal is to rotate array A K times; that is, each element of A will be shifted to the right K times.

Write a function:

function solution($A, $K);

gregorynicholas

// Weekly Employee Income Withholding Calculator by GitHub#Liath
// Based on IRS Circular E - http://www.irs.gov/pub/irs-pdf/p15.pdf
// Per the "Percentage Method"
var  w = {
    s : { // Single
        0    : { p : 0, s : 0 },
        44   : { p: 0.1, s: 0 },
        222  : { p: 0.15, s: 17.8 },
        764  : { p: 0.25, s: 99.1 },
        1789 : { p: 0.28, s: 355.35 },

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#!/usr/bin/env bash
set -e

# See also: https://github.com/frost-nzcr4/find_forks (same thing but in python)

origin_url="$(git remote show origin | grep 'Fetch URL:' | sed 's+.*: ++')"

full_repo_name="$(echo "$origin_url" | sed 's+.*github.com/++')"

forks_url="https://api.github.com/repos/${full_repo_name}/forks"