de git à la blockchain
TRANSCRIPT
Victor SabatierFreelance Web and mobile
developper.
Build stuff using Meteor, React and React native.
Love learning and sharing
Snowcamp 2017 - @sabativi
Plan :1. Deeper look into git
2. How Blockchain works ?3. Links between the two4. Bonus and conclusion
Snowcamp 2017 - @sabativi
Some advantages :· Local operations.
· Integrity.· Everyone has a copy of the
entire repo.· Few operations are
destructive.
Snowcamp 2017 - @sabativi
A functional data structure is an immutable data structure.
Snowcamp 2017 - @sabativi
On internet, all trades are done with financial
institutionsSnowcamp 2017 - @sabativi
Exchange money without the need of a central
trusted partySnowcamp 2017 - @sabativi
How to reach a concensus on a peer to peer Network ?
Snowcamp 2017 - @sabativi
Problems to solve· Identification ?
· Enough money ?· How to avoid double
spending ?
Snowcamp 2017 - @sabativi
Every transaction is signed with a private key.
Snowcamp 2017 - @sabativi
Transactions have inputs that reference
previous outputs transactions.
Snowcamp 2017 - @sabativi
We cannot depend on time as it is easily
falsifiable.Snowcamp 2017 - @sabativi
Answer to a Mathematical problem
Hard to solve, easy to verify.
Snowcamp 2017 - @sabativi
SHA256(block, nonce) < yProof of work 2
2 Due to SHA256 construction, random guess or brute force is your best choice to find a solution.
Snowcamp 2017 - @sabativi
First person to find a solution will broadcast the block to the
networkSnowcamp 2017 - @sabativi
We have replace Trust in Finance by trust in Math.
Snowcamp 2017 - @sabativi
· Changes are organized in a chain protected by
cryptographic hashes.· Distributed storage and
integrity checks.· Identification is secure.
· Blocks and commits used Merkle trees internally.
Snowcamp 2017 - @sabativi
· Everyone strives to work on a single branch.
· No merge, no fork in blockchain.
· No proof of work in git.· Limited content on a block.
Snowcamp 2017 - @sabativi
In Git content mattersregardless of the branch,
in Blockchain consensus mattersregardless of the content.
Snowcamp 2017 - @sabativi
From Bitcoin to GitcoinOr how to turn a git repository into a blockchain
Snowcamp 2017 - @sabativi
I have constructed this presentation with3 :· Bitcoin under the hood
· Mastering Bitcoin· Original paper
· Coursera· Git is a purely functional data structure
· Stripe challenge3 Icons made by Freepik from [Flaticon]
Snowcamp 2017 - @sabativi