Blockchain Developers Meetup 05 - Introduction to Polkadot

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About me • Founder and CEO of hack.bg • Full-stack developer • Blockchain enthusiast and developer • Email: [email protected] • Twitter: @milen_radkov • Milen Radkov

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What happened recently? • Aeternity is LIVE • BCH hard fork • Ethereum 2.0

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Aeternity mainnet launch

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Bitcoin Cash hard fork BCH ABC BCH SV

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Ethereum 2.0 https://ethresear.ch/ https://ethereum-magicians.org/ More info: VM improvements - EWASM (https://github.com/ewasm) PoS (Casper), Beacon chain Sharding https://github.com/ethereum/eth2.0-specs/tree/master/specs/core

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Introduction to

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What is?

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a network that connects Blockchains is Attempting to solve problems: 1. Interoperability 2. Scalability 3. Shared Security

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How does work ?

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network • Validators • Nominators • Collators • Fishermen

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network • Validators - Secure the relay chain by staking DOTs, validating proofs from collators and participating in consensus with other validators

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network • Nominators - Secure the relay chain by selecting good validators and staking DOTs

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network • Collators - Maintain parachains by collecting parachain transactions from users and producing state transition proof for validators.

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network • Fishermen - Final security frontier, they monitor the network and prove bad behaviour to validators

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Start your own node using Docker Polkadot / Substrate Workshop

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Goals

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Laptop Docker Requirements Wiﬁ

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Readme Riot How to start Rust Toolchain https://github.com/paritytech/polkadot https://github.com/paritytech/substrate Build and wait …

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docker pull chevdor/polkadot:0.2.17 Step 1: docker pull chevdor/substrate

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docker run --rm -it chevdor/polkadot:0.2.17 polkadot Step 2:

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mkdir -p /home//polkadot-data Step 3: docker run --rm -it -p 30333:30333 -p 9933:9933 -v / home//polkadot-data/:/data chevdor/ polkadot:latest polkadot

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Step 4: docker run --rm -it -p 30333:30333 -p 9933:9933 -v / home//polkadot-data/:/data chevdor/ polkadot:latest polkadot --name "hackbg"

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Now what? Dashboard and Monitoring:  http://telemetry.polkadot.io http://gav.polkadot.io/ https://poc-2.polkadot.io/#/explorer (All hosted) https://polkadot.js.org/apps/#/explorer (need local node) https://polkadot.js.org/apps/next/#/explorer

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Thank you

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Resources https://1ml.com/ https://www.coinrivet.com/lightning-network-hits-massive-capacity-growth-in-just-a-month/ https://www.youtube.com/watch?v=lIghiCmHz0U&feature=youtu.be https://www.reddit.com/r/dot/comments/8xmns6/welcome_to_polkadots_subreddit_read_this_guide_to https://blog.aeternity.com/introducing-roma-the-ﬁrst-live-implementation-of-the-%C3%A6ternity- blockchain-5a1cebfc3384 http://polkadot.io/ https://riot.im/app/#/room/#polkadot-watercooler:matrix.org https://github.com/w3f/Web3-wiki/wiki/Polkadot