The intersection between open-source and blockchain : Trust and Consensus

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The intersection between open-source and blockchain : Trust and Consensus Charles Jhong August 2 2020

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About Me - Hey I’m Charles Jhong - A golang developer - Working at AMIS - Wallet service backend - Bitcoin/Omni integration - Motorcycle enthusiast 2

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Agenda - What is blockchain? - What does blockchain to do with open-source? - Philosophy in common - AMIS’s open-sourced project 3

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What is blockchain? 4

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Bitcoin - A decentralized ledger maintained by a distributed system - What does “decentralized” mean ? - Who are those “miners” ? - With an innovative economy model, a currency system without bank and government was born - It’s designed as a ledger, but just a ledger 5

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Ethereum - A distributed computing platform featuring smart contract - With a turing complete programming language called Solidity - Smart contracts (aka Dapps) will be executed in an isolated environment called EVM 6

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Ethereum - Each dapp has its own storage and logic - Not only a ledger system anymore - Blockchain becomes a stack of protocols - There’s no need to build a new chain for most developer - Layer 1 focus on security, scaling while layer 2 focus on applications and business 7

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Ethereum 8

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Ethereum 9

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What does blockchain to do with open-source? 10

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Trust - the core of a ﬁnancial system 11

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No source, no trust - Without government, people trust blockchain system is because they trust cryptography algorithms, game theory and the consistency of Dapps execution result - In order to make sure these characteristics preserved, revealing it’s source code is inevitable 12

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Fundamental ones - Cryptography library - Client node - To convince those early adaptors - More developers and users, more secure 13

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Dapp needs transparency - There’s no trust in a decentralized black box - What if somebody deploy another Dapp instance using my open-sourced code? - Copyright? - Business model - Maintenance 14

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Consensus - Consensus algorithm - If parties in community are not in agreement of certain change, alternative (forked) chains may emerge 15

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Philosophies in common 16

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Collaboration - Open source is an eﬃcient way of people collaborate with each other - Miners are incented to do good things together so the system can be trust 17

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Freedom - No censorship - Self-sovereignty (Your assets, your control) - An internet of value 18

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Open and Transparency - Open ﬁnance - Voting - On-chain governance - DAO : Decentralized Autonomous Organization 19

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AMIS’s open-source project 20

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Alice - A HTSS library written in golang - Hierarchical Threshold Signature - Shorter signature and better privacy than multisig - Improve accountability of TSS 21

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General multisig 22

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TSS & HTSS 23 Threshold Signature : Hierarchical TSS

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Alice - Reviewed and Audited by Kudelski Security - Github : https://github.com/getamis/alice - AMIS Medium : https://medium.com/getamis 24

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Vishwakarma - Terraform modules for deploying self-hosting kubernetes cluster - Infrastructure-as-code (IaC) - Versioning infrastructure - Reusable module - With default and customized ASG - Github : https://github.com/getamis/vishwakarma 25