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Bitcoin Week 2

Question: How do blocks commit to witness data?

Witness in Bitcoin transaction refers to contents of signature scripts which prove the authenticity of a transaction. Blocks commit to witness data via putting the witness commitment into an output of the coinbase transaction.

Witness commitment = combined hash of witness root hash and witness reserved value.
Witness root hash = merkle root of witness txids (wtxids) of all transactions in the block.

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "[email protected]"

	# 0 is too far from ` ;)
	set -g base-index 1

	# Automatically set window title
	set-window-option -g automatic-rename on
	set-option -g set-titles on

	#set -g default-terminal screen-256color
	set -g status-keys vi
	set -g history-limit 10000