## Welcome!
###### Snacks & drinks are available, please help yourself!
<small>Join our slack group!</small>
<small>
* Wifi: "Blockchain Meetup", Password: "learnblockchain"
* Code of Conduct: https://gitlab.com/TrevorJTClarke/blockchain-pdx/blob/master/Code_Of_Conduct.md
</small>
<small>Thank you to our sponsors: [Amberdata.io](https://amberdata.io), [Consensys](https://www.buidlnetwork.net/), [10net](10net.net)</small>
---
## Intro to Blockchain
- What is the "blockchain"?
- The History surrounding blockchain
- What problems does it solve
- (Most importantly) How can I use it!
---
### In a sentence...
A blockchain is a <span>decentralized<!-- .element: class="fragment highlight-red" data-fragment-index="0" --></span>, <span>distributed<!-- .element: class="fragment highlight-red" data-fragment-index="1" --></span>, and oftentimes <span>public<!-- .element: class="fragment highlight-red" data-fragment-index="2" --></span>, <span>digital<!-- .element: class="fragment highlight-red" data-fragment-index="3" --></span> <span>ledger<!-- .element: class="fragment highlight-red" data-fragment-index="4" --></span> that is used to record transactions across many computers so that any involved record <span>cannot be altered<!-- .element: class="fragment highlight-red" data-fragment-index="5" --></span> retroactively, without the alteration of all <span>subsequent blocks<!-- .element: class="fragment highlight-red" data-fragment-index="6" --></span>.
-- [Wikipedia](https://en.wikipedia.org/wiki/Blockchain)
<div style="position: relative; width: 100%; height: 100%">
<span style="
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">not one single entity has control<!-- .element: class="fragment fade-in-then-out" data-fragment-index="0" --></span>
<span style="
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" >the processing doesn't happen in the same place<!-- .element: class="fragment fade-in-then-out" data-fragment-index="1" --></span>
<span style="
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" >anyone can view records/transactions - transparency!<!-- .element: class="fragment fade-in-then-out" data-fragment-index="2" --></span>
<span style="
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" >not physical - on the internet<!-- .element: class="fragment fade-in-then-out" data-fragment-index="3" --></span>
<span style="
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" >a record of entries e.g. transactions<!-- .element: class="fragment fade-in-then-out" data-fragment-index="4" --></span>
<span style="
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" >immutability! <!-- .element: class="fragment fade-in-then-out" data-fragment-index="5" --></span>
<span style="
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" > forms a chain! <!-- .element: class="fragment fade-in-then-out" data-fragment-index="6" --></span>
</div>
---
---
# The History
---
## Surety's Absolute Proof (1991)
<div style="position: relative; text-align: left; padding-left: 25px">
Creators: Haber and Stornetta
Nutshell: a "hash-chain" of timestamped digital document signatures that are published on the New York Times weekly. Enables customers to verify the timestamp and integrity of a digital document.
<small>(Cited 3 times in the Bitcoin whitepaper)</small>
</div>
---
## Surety's Absolute Proof (1991)
---
## Surety's Absolute Proof (1991)
<div style="position: relative; text-align: left; padding-left: 25px">
Contributing concepts: hash-chain, distibuted ledger system
</div>
---
## Surety's Absolute Proof (1991)
### Is it "Hackable" ??
---
## Hashcash (1997)
<div style="position: relative; text-align: left; padding-left: 25px">
Creator: Adam back
Nutshell: A cryptographic hash-based proof-of-work algorithm used to limit email spam and denial-of-service attacks. Limits spam by requiring the sender to spend CPU time to create a hash the the receiver can quickly verify.
Contributing concept: Proof-of-Work
</div>
---
## B-money (1998)
<div style="position: relative; text-align: left; padding-left: 25px">
Creator: Wei Dai
Nutshell: an "anonymous, distributed electronic cash system"
Contributing concepts: Anonymity, secure electronic transactions, in-network contract enforcement (primative Ethreum Smart Contracts)
</div>
---
## Bitgold (2005)
<div style="position: relative; text-align: left; padding-left: 25px">
Creator: Nick Szabo
Nutshell: "a financial system that combines different elements of cryptography and mining to accomplish decentralization" *
Contributing concept: Proof of Work, decentralization
</div>
<small>* [Investopedia](https://www.investopedia.com/terms/b/bit-gold.asp)</small>
---
## Bitcoin (2009)
<div style="position: relative; text-align: left; padding-left: 25px">
Creator: Satoshi Nakamoto
Nutshell: Is a decentralized digital currency without a central bank or single administrator that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries.
Contributing concept: The first fully operational blockchain.
</div>
---
## Ethereum (2016)
<div style="position: relative; text-align: left; padding-left: 25px">
Co-founders: Vitalik Buterin, Gavin Wood, Joseph Lubin
Nutshell: Ethereum is an open source, public, blockchain-based distributed computing platform and operating system featuring smart contract functionality.
Contributing concept: Smart Contracts
</div>
---
## Smart Contract
<small>
Immutable self-executing, code that lives on the blockchain and allows for trustless transactions and agreements amongst disparate, anonymous parties without the need for a central authority, legal system, or external enforcement mechanism
</small>
<span> Ex. Tamper-proof Vending Machine <!-- .element: class="fragment fade-in" data-fragment-index="0" --></span>
---
## Today
---
## What do these projects have in common?
<span> They need a way to easily extract meaningful data from the Blockchain.<!-- .element: class="fragment fade-in" data-fragment-index="0" --></span>
---
## How: The hard way
<div style="position: relative; text-align: left; padding-left: 25px">
Run a server that talks to the network</br>
Extracting data via Json RPC</br>
Aggregating data</br>
</div>
---
## How: The easy way
Using Amberdata!
#### We do the heavy lifting 💪
<div style="position: relative; text-align: left; padding-left: 25px">
Running nodes & extracting data
Storing data that is optimized for advanced queries
Providing historical data
Interweaving Market Data with block chain data
</div>
---
## The API
- Over 100 endpoints
- Real-time & historical time series Blockchain & Market data
- JSON RPC Compliant methods
[Documentaion âžž](https://docs.amberdata.io/reference)
---
## The API Key
Onboarding is fast!
[Getting Started âžž](https://amberdata.io/onboarding)
---
### Example: Get transaction + Market Data
[Example âžž](https://runkit.com/taylorjdawson/web3data-js-get-transaction)
---
### Example: Token Rankings
[Example âžž](https://runkit.com/taylorjdawson/web3data-js-example-token-rankings)
---
### Example: Real-time Data - Blocks
[Example âžž](https://runkit.com/taylorjdawson/web3data-js-example-websocket)
---
## Real life examples:
- Block viz
- NFTs
---
Thanks for listening!
Slides available [here](https://hackmd.io/@1XqK8hlWRW6FMt8Q5EAXJw/ryY2tggwB).
Website: Amberdata.io
Docs: Docs.amberdata.io
Follow us on [Medium](https://medium.com/amberdata) & [Twitter](https://twitter.com/Amberdataio)
---
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