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【Ethereum 智能合約開發筆記】不用自己跑節點,使用 Infura 和 web3.js 呼叫合約

Infura Logo From Consensys

Infura 提供公開的 Ethereum 主網和測試網路節點。到 Infura 官網申請,只要輸入一點基本資料和 Email,就可以收到 API-key。

Infura API Key


@korakot
korakot / colab_download.py
Created November 15, 2017 08:40
Google colab file upload/download
files.download('example.txt') # from colab to browser download
@noygal
noygal / Windows Subsystem for Linux version 1 and 2 (WSL) - node install guide.md
Last active September 27, 2025 02:40
Installing node via windows subsystem for linux

Windows 10 version 2004 - Installing Node.js on Windows Subsystem for Linux (WSL/WSL2)

UPDATE (Fall 2020): This gist is an updated version to the Windows 10 Fall Creators Update - Installing Node.js on Windows Subsystem for Linux (WSL) guide, I usually just keep here notes, configuration or short guides for personal use, it was nice to know it also helps other ppl, I hope this one too.

Windows updated windows subsystem for linux to version 2, as the F.A.Q stated you can still use WSL version 1 side by side with version 2. I'm not sure about existing WSL machines surviving the upgrade process, but as always backup and 🤞. NOTE: WSL version 1 is not replace/deprecated, and there ar

@ivanleoncz
ivanleoncz / flask_job_scheduler.py
Last active June 27, 2024 07:23
Demonstrating APScheduler on a Flask App.
#!/usr/bin/python3
""" Demonstrating APScheduler feature for small Flask App. """
from apscheduler.schedulers.background import BackgroundScheduler
from flask import Flask
def sensor():
""" Function for test purposes. """
print("Scheduler is alive!")
@WangYihang
WangYihang / port-forwarding.py
Last active December 19, 2024 02:20
port forwarding via python socket
#!/usr/bin/env python3
# Tcp Port Forwarding (Reverse Proxy)
# Author : WangYihang <wangyihanger@gmail.com>
'''
+-----------------------------+ +---------------------------------------------+ +--------------------------------+
| My Laptop (Alice) | | Intermediary Server (Bob) | | Internal Server (Carol) |
+-----------------------------+ +----------------------+----------------------+ +--------------------------------+
| $ ssh -p 1022 carol@1.2.3.4 |<------->| IF 1: 1.2.3.4 | IF 2: 192.168.1.1 |<------->| IF 1: 192.168.1.2 |
| carol@1.2.3.4's password: | +----------------------+----------------------+ +--------------------------------+
@matthewzring
matthewzring / markdown-text-101.md
Last active March 4, 2026 15:33
A guide to Markdown on Discord.

Markdown Text 101

Want to inject some flavor into your everyday text chat? You're in luck! Discord uses Markdown, a simple plain text formatting system that'll help you make your sentences stand out. Here's how to do it! Just add a few characters before & after your desired text to change your text! I'll show you some examples...

What this guide covers:

@Birdie0
Birdie0 / ifttt-webhooks-extended-guide.md
Last active March 3, 2026 06:19
How to use Discord Webhooks

⚠️ This gist is no longer updated! For maintained, improved and even more extended guide click here.


How to use Discord Webhook

It's a JSON

First, learn JSON. It's not programming language, not even close. Just follow syntax rules and you will be fine.

@mihow
mihow / load_dotenv.sh
Last active February 17, 2026 09:54
Load environment variables from dotenv / .env file in Bash
# The initial version
if [ ! -f .env ]
then
export $(cat .env | xargs)
fi
# My favorite from the comments. Thanks @richarddewit & others!
set -a && source .env && set +a
@gauravbarthwal
gauravbarthwal / Multi-Part zip extraction in Ubuntu.txt
Last active December 11, 2025 16:09
How to extract multi-part .zip, .z01, .z02 files in ubuntu
Download/Copy all related *.zip files in one directory.
Open terminal and change to that directory which has all zip files.
Enter command zip -s- FILE_NAME.zip -O COMBINED_FILE.zip
Enter unzip COMBINED_FILE.zip
@tanyuan
tanyuan / fcitx-chewing.png
Last active August 19, 2024 22:42
Ubuntu: fcitx + chewing 新酷音輸入法
fcitx-chewing.png