• Using Stellar to build a regulation-friendly token

    Carrer de la Reina Cristina, 9

    ## When? 17/09/2019 - 18.30 ## Description Stellar is a blockchain platform launched five years ago, with a market cap $1.2B at #11, but many blockchain veterans hold Stellar Lumens without knowing what it's about. Chuck LeDuc Díaz will provide an introduction to Stellar, illustrate the tokenization model and built-in exchange, and explain how to use its trust anchors, trustlines, and market-making tools to build a functioning market for a regulation-friendly token. # Preliminary agenda 18.30h - Welcome 19.00h - Using Stellar to build a regulation-friendly token, by Chuck LeDuc 19.00h - Q&A 20.00h - Beers, thanks to Estrella Damm :) # Who is Chuck LeDuc Díaz? Chuck LeDuc Díaz is an American-Canadian software developer. He joined Caelum Labs in April 2019 as tech lead, focused on engineering and product delivery. He got started with Bitcoin in 2012 and has been developing full-time on Ethereum and IPFS for three years, and previously worked for Sage developing web-based accounting software.

  • RSK and Bitcoin: building the Internet of Value with the CEO Diego Gutiérrez

    ## When? 12/08/2019 - 18.45 ## Description RSK is a smart-contract peer-to-peer platform built on top of the Bitcoin blockchain using some innovations like merge-mining. Its goal is to add value and functionality to the core Bitcoin network by the implementation of smart contracts as a Layer 2 solution. In this Meetup, Diego Gutiérrez, CEO of RSK, will talk about RSK and the RSK Infrastructure Framework Open Standard (RIF OS), a set of open and decentralized infrastructure protocols that allow faster, easier and more scalable development of distributed applications (dApps) within a unified environment. RIF OS allows developers to access a set of decentralized infrastructure protocols to create scalable distributed applications (dApps) within a unified environment that helps accelerate time to market. By providing broad interoperability and faster implementation time, RIF OS aims to close the gap between blockchain technologies and their mass adoption in the market. We will discover other projects like the RSK Name Service (identification of RSK addresses by human-readable names, in the same way, that Ethereum Name Services do) and discuss the RSK roadmap including stablecoins, Decentralized finances and other initiatives on the top of this smart-contracts platform. This meetup is a unique oportunity to meet one of the most prominent blockchain pioneers in Latin America and the World, don't miss it! # Agenda 18.45h - Welcome 19.00h - RSK: the internet of Value over Bitcoin, by Diego Gutiérrez 19.30h - Q&A 19.50h - Beers, thanks to Estrella Damm :) # Who is Diego Gutiérrez? Diego Gutiérrez Zaldívar was one of the pioneers in web development in Argentina and Latin America. He is Argentine and is dedicated to understanding the latest technologies and turning them into usable tools for business and social transformation. He was part of the founding teams of Clarín Digital, Patagon.com, Internet Argentina, and Xinergia. He met the Bitcoin world in 2011. Since 2012, Diego decided to devote himself entirely to the creation of Bitcoin communities in Argentina and Latin America. The Argentine community is one of the most active worldwide. Since 2015 he co-founded and is CEO of RSK Labs, the company behind RSK, the first smart contract platform over Bitcoin.

  • Can't be Evil - Discovering Blockstack

    Carrer de la Reina Cristina, 11

    ## Description It's all about fundamental digital rights. ☝️ Blockstack is a full-stack decentralized computing protocol that enables a new generation of applications where developers and users can interact fairly and securely, while curing the ills of centralized Internet design. Mark will present an overview of Blockstack and Matt will walk you through Blockstack APIs and how this library handles everything from identity and authentication to data storage. 100% Javascript and Zero-backend development # Preliminary agenda 18.30h - Welcome 18.45h - Blockstack - The Decentralized Computing Network 19.00h - Blockstack Developer Tools 19.15h - Q&A 19.45h - Beers, thanks to Estrella Damm :) # Who is Mark Hendrickson? Mark Hendrickson is a Product Manager from San Francisco with over a decade designing, developing and marketing Web and mobile applications for startups. He now lives in Barcelona in self-imposed exile having launched a number of products in Silicon Valley such as Plancast, KITE, Lift and CrunchBase. # Who is Matt Little? Matt is a Full-stack engineer at Blockstack, involved in blockchain related development for over 5 years. He worked as a lead developer at several startups, shipping both developer and consumer-facing products. Prior to Blockstack, Matt was a senior engineer at Hosho and lead development on an Ethereum smart contract development and testing tool suite. # Resources Community Resources * https://community.blockstack.org/slack * https://forum.blockstack.org/ Education Resources: * Tutorials: https://docs.blockstack.org/ * whitepaper:https://blockstack.org/whitepaper.pdf * Blog: :https://blog.blockstack.org

  • Discovering Polkadot & Substrate with its developers

    Carrer de Pau Claris, 162

    Join us for a fun evening of talks and hanging out for our Polkadot Happy Hour. This Meetup will be following a Substrate workshop: https://www.eventbrite.com/e/parity-substrate-workshop-build-a-custom-blockchain-tickets-63870310819 You can also join the Polkadot Barcelona Meetup group: https://www.meetup.com/Polkadot-Barcelona/ Speakers: *Benjamin Kampmann, Introduction to Polkadot & Substrate *Alex Puig, Bringing identities to Polkadot & Substrate *David Suarez, IDEN3 zk-identities on substrate 6:30 - 6:45 : Get settled and introduction 6:45 - 7:00 : Benjamin Kampmann 7:00 - 7:15 : Alex Puig 7:15 - 7:25 : David Suarez 7:25 - 9:00 : Hang out, have a few beers and get to know the Barcelona Polkadot community! Beer & snacks will be available # Who are Benjamin Kampmann & Gautam Dhameja? Benjamin and Gautam are Polkadot developers at Parity. # What is Polkadot? Polkadot enables cross-blockchain transfers of any type of data or asset, not just tokens. Connecting to Polkadot gives you the ability to interoperate with a wide variety of blockchains in the Polkadot network, enabling a common set of validators to secure multiple blockchains You can create a blockchain in minutes using the blockchain-building framework Substrate. Connect it to Polkadot and get interoperability and security from day one. # What is Parity? Founded by blockchain pioneers, Parity Technologies is now a team of 80+ in nine countries developing technologies such as the Parity Ethereum Client, Polkadot and Substrate.

  • IPFS Core Developers & Community Meetup (Pre-event IPFS Camp)

    MOB Bailén - Coworking in Barcelona

    ## When & Where 25/06/2019 - 18.00 MOB - Makers of Barcelona Carrer de Bailén, 11 https://goo.gl/maps/cHLHq95obbhouTP4A ## Description IPFS is the distributed web, a peer-to-peer hypermedia protocol to make the web faster, safer, and more open. The IPFS Community is gathering for the first time to host a large event, IPFS Camp, a unique experience designed to bring together 150 pioneers in the Distributed Web space in Barcelona on June 27-30. Connect with the larger IPFS Community on Tuesday, June 25 for a Meetup event starting at 18:00 in Makers of Barcelona. This is an opportunity to meet the Core Developers of the IPFS protocol and many of the builders that are deploying IPFS into production. Join us for Lightning Talks and a chance to learn more about the IPFS roadmap, IPFS Camp Barcelona, and more! We would love to hear from you! Please fill out this form if you are interested in giving a talk on your project, what excites you about IPFS, or anything else you would like to share with the IPFS Community: https://protocollabs.typeform.com/to/IEMyVC Appetizers and beverages will be provided. Please, RSVP so we can get a headcount. Thank you! ## Agenda 18:00 - 19:00h: Welcome + Drinks 19:00 - 20:30h: Talks & Presentations & IPFS Camp info 20:30 - 21:30h: Networking + Catering ### Lightning Talks Molly (Protocol Labs): IPFS mid-2019: where we're at and where we're going Jim Pick (Protocol Labs): PeerPad and peer-base: Building collaborative apps using IPFS and CRDTs Hugo Dias (Protocol Labs): Exploring ways to improve IPNS Michael Burns (Community): How to Run an IPFS Gateway for Zero Fun and Even Less Profit

  • Introduction to Decentralized Finances & Origin Marketplace (+ETH giveaway)

    Carrer de la Reina Cristina, 11

    ## When? 18/06/2019 - 18.30 ## Description The emergence of the blockchain technologies created a fertile ground for decentralized applications in the economy. During the last months, we are seeing born several projects like Decentralized Organizations, Decentralized Stable Coins, and Decentralized Marketplaces that can be the platform for a new economy. In this meetup, we will know more about this topic, from Decentralized Finances to decentralized Marketplaces. Hugo Sánchez, Blockchain developer and member of Ethereum's Cat Herders team, will introduce us to the emerging Decentralized Finances and the economy behind MakerDAO and its stable coin DAI. After this introduction, Austin Virts, Head of Marketing at Origin Protocol, will show us, remotely, the new developments of the decentralized marketplace Origin and will do a ETH giveaway to the attendees allowing them to convert it to DAI and purchase a shirt on the Origin Marketplace. # Preliminary agenda 18.30h - Welcome & Beers 18.40h - Introduction to Decentralized Finances & DAI, by Hugo Sánchez 19.00h - Origin Protocol & the future of decentralized marketplaces, by Austin Virts 19.20h - Free interactive demo to buy a t-shirt on the Origin Marketplace. 20.00h - Beers, thanks to Estrella Damm :) # Who is Hugo Sánchez & Austin Virts? Hugo Sánchez is a Blockchain developer at Caelum Labs where he focuses on building mobile interfaces for decentralized protocols. He is also member of the Ethereum's Cat Herders fellowship, a community of PR experts helping move Eth 1.X forward. Austin Virts is the Head of Marketing at Origin Protocol. Austin is passionate about free, open commerce and opening up the global economy to everyone. Origin protocol is building a blockchain platform for building decentralized marketplaces.

  • Discovering the differences between Ethereum and Obyte smart-addresses

    Carrer de la Reina Cristina, 11

    Important info: During this meetup you will learn how to write your first smart-contract using Obyte. We recommend you to bring your laptop. Currently, smart-contracts have become synonymous of Solidity scripts on Ethereum, and these can be used to create many things: multi-sig wallets, fungible and non-fungible tokens, escrow wallets and so on. There are endless ways in which the same functionality can be written differently in Solidity, which means that these smart-contracts are usually not readable for regular users and each implementation of the same functionality can have different bugs just because a developer forgot to restrict access to something that should have been limited by default. It’s good to see standardization of basic functionalities (ERC20, ERC721, SafeMath) with Solidity code, but its usually too late if your broken code is already up there and you didn’t think about how to replace the broken parts of you smart-contract. Fortunately, this is not the only way to write smart-contracts. Obyte is a cryptocurrency platform built on DAG (directed acyclic graph) and it has human readable smart-contracts, also called smart-addresses because they are just addresses, which have a set of conditions that have to be true to spend from them. Using these smart-addresses, the Obyte platform has multi-sig wallets, fungible and non-fungible tokens, escrow wallets and many other usual smart-contract functionalities already built-into the platform. It is still possible to miss some conditions that can leave bugs in smart-contracts, but it's more difficult to make mistakes as the Obyte’s smart-contract language is declarative. # Agenda - 21/05/2019 * 18:30 - Welcome by Caelum Labs * 18:35 - CockroachDB presentation by Robert & Armen * 19.00 - Obyte presentation by Tarmo * 19:30 - Installying Obyte bot & writing your first smart-contract for it * 20:30 - Networking and beers :) ## Who is Tarmo Annus? Tarmo Annus is software developer from Obyte. He has worked in many web development companies in the past 15 years, but he dived into cryptocurrencies full-time just 2 years ago by discovering the possibilities of Ethereum smart-contracts. The success of CryptoKitties also brought out additional problems with Ethereum smart-contracts, which made him look for other solutions until he found Obyte (formerly called Byteball). ## Who are Robert and Armen? Robert Lee leads has experience as a developer & infrastructure delivery and extensive enterprise database experience for over 25 years solving mission critical needs for the largest global companies. Armen Kopoyan is General Manager & International operates CockroachDB global business. Having worked in database technology for over 20 years, he works with companies looking for alternatives to the status quo of working with legacy technologies. Obyte cryptocurrency platform * https://obyte.org/ * https://twitter.com/ObyteOrg ## Want to know more about Devcentralised meetups and Caelum Labs? Follow us on Twitter https://twitter.com/caelumlabs Join our newsletter http://newsletter.caelumlabs.com Join our Telegram group https://t.me/joinchat/Ambt_li_hUnVTTkvIgKwfQ

  • Why Rust Is Ideal For Blockchain Development

    Carrer de la Reina Cristina, 11

    # Why Rust Is Ideal For Blockchain Development Rust is one of the best programming languages for blockchain due to its highly-capable mechanism of handling mutable states. Also, the Rust compiler provides awe-inspiring optimization for blockchain. The fast, memory safe, and exclusively concurrent nature of this blockchain coding language makes it most suitable for developing real-world blockchains. Every day more and more blockchain projects choose rust; parity, polkadot, cardano rust, ethereum classic, exonum, grin, substrate, lighthouse, Nimiq. Do you want to know why? During this meetup, Roberto Huertas will make a talk about Getting to know Rust, for all of those who don’t know the language and want to know more about it. Also, he will present the rust community in Barcelona, and the celebration of then next RUSTFest edition to be held in Barcelona this Fall, an event in which Caelum Labs is a co-organizer. Alex Puig will talk about why rust is one of the best programming languages for blockchain. There is a vast difference between "program correctness was checked by tests" and "program correctness was logically proven". Rust as a language is different. Not because of its fancy syntax or welcoming community, but because of the confidence one gains when writing a program in it. # Agenda 18.30h - RustFest Barcelona edition presentation 18.35h - BCN Rust community presentation 18.40h - Introduction to Rust language by Roberto Huertas (BCN Rust) 19:00h - Interactive 101 session "Why Rust is the ideal language for Blockchain? by Alex Puig 20.00h - Beers :) # Who are Roberto Huertas and Alex Puig? Roberto Huertas is a software developer familiarized with different programming languages during his professional life, such as C#, JavaScript, TypeScript, Dart, Rust and others. He's currently working at Telefónica Innovación Alpha (https://alpha.company) as a tech lead in the Health Moonshot. Alex Puig is a software developer with extensive experience in Blockchain and self-sovereign identity; he was always involved in R+D projects and the tech entrepreneur scene. He is Caelum Labs’ CTO and founder of Alastria, the Spanish national blockchain and the first in Europe. He is familiarized with Node.js, Rust and Solidity. # Want to know more about Devcentralised meetups and Caelum Labs? Follow us on Twitter https://twitter.com/caelumlabs Join our newsletter http://newsletter.caelumlabs.com Join our Telegram group https://t.me/joinchat/Ambt_li_hUnVTTkvIgKwfQ

  • 101 Zero-knowledge technology: All you wanted to know!

    Carrer de la Reina Cristina, 11

    ## When & Where 02/04/2019 - 18.30 Caelum Labs office Carrer Reina Cristina, 11 1st floor, 1st door. Barcelona # Description During this meetup, José and Marta will introduce us to the zero-knowledge technology (what it is and what properties a zero-knwoledge test must fulfill). We will focus on the elements of the zk-SNARKs protocol. In particular, we will explain why it works (in what cases can be applied) this protocol, we will talk about logic and arthritic circuits, we will see how from these circuits all polynomials can be generated and we will introduce the topic of the famous "trusted setup". Finally, in the generation of the zk-SNARK test, the use of elliptical curve cryptography and the idea of homomorphic encryption are necessary. We will explain the main ideas of these types of cryptography and what role it plays in this protocol. # Preliminary agenda 18.30h - Presentation 18.35h - Zero-knowledge technology: Zero knowledge test, zk-SNARKs, elliptic curve, homomorphic encryption and more. 19.15h - Q&A 19.30h - Beers :) ## Who are José Luis and Marta Bellés? José Luis Muñoz: PhD in Telecommunications Engineering from the UPC and professor in the Department of Telematics Engineering at the UPC. His research work focuses on the field of network security, cryptography and applications for blockchain. In this area, he is the co-author of dozens of articles in magazines and congresses, as well as project evaluator for the Ministry of Energy, Tourism and Digital Agenda. Marta Bellés: She studied mathematics degree at the UAB and master's degree in Denmark focused on the study of elliptic curves and its uses to cryptography. She returned to Catalonia during the summer of 2018 and started to work at iden3, a Self-sovereign identity project based on Blockchain and zero-knowledge proofs to guarantee the privacy. Apart from that, she works as an associated teacher on Maths at the Universitat Pompeu Fabra. ## Want to know more about Devcentralised meetups and Caelum Labs? Follow us on Twitter https://twitter.com/caelumlabs Join our newsletter http://newsletter.caelumlabs.com Join our Telegram group https://t.me/joinchat/Ambt_li_hUnVTTkvIgKwfQ

  • Scalability meets Ethereum: Omisego's Plasma MoreVP implementation

    Carrer de la Reina Cristina, 11

    During this meetup, we will discover what is Plasma, how it enables a new scalability solution on the top of Ethereum and what Omisego's Team is developing to reach this goal in the most user-friendly way with their implementation of Plasma MoreVP. # Preliminary agenda 18.30h - Presentation 18.35h - Omisego's Plasma MoreVP implementation with Kevin Sullivan 19.15h - Q&A 19.30h - Beers :) # Who is Kevin Sullivan? Kevin Sullivan is a Senior Researcher at OmiseGO, currently working at putting the finishing touches on Plasma MoreVP, in alpha release very soon. Previously worked on various blockchain projects at Rakuten Blockchain Lab. # Want to know more about Devcentralised meetups and Caelum Labs? Follow us on Twitter https://twitter.com/caelumlabs Join our newsletter http://newsletter.caelumlabs.com Join our Telegram group https://t.me/joinchat/Ambt_li_hUnVTTkvIgKwfQ