Vignesh Karthikeyan Meshugah

Create your own Ethereum private network

Introduction

Used nodes:

Linux raspberrypi 4.9.41-v7+ #1023 SMP Tue Aug 8 16:00:15 BST 2017 armv7l GNU/Linux

Linux localhost.localdomain 4.14.5-200.fc26.x86_64 #1 SMP Mon Dec 11 16:29:08 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

This notes is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Need

Convert .mov/.MP4 to .gif

Reason

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

Description of the withdrawal flow

Starting on L2:

Any account on L2 may call OVM_L2CrossDomainMessenger.sendMessage() with the information for the L1 message (aka xDomainCalldata)
- (ie. _target, msg.sender, _message)
- This data is hashed with the messageNonce storage variable, and the hash is store in the sentMessages mapping (this is not actually used AFAIK)
- The messageNonce is then incremented.
The OVM_L2CrossDomainMessenger then passes the xDomainCalldata to OVM_L2ToL1MessagePasser.passMessageToL1()
the xDomainCalldata is hashed with msg.sender (ie. ovmCaller), and written to the sentMessages mapping.

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	let UserContext = React.createContext();

	class App extends React.Component {
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	setUser: user => {
	this.setState({ user });
	}
	};