There is so much happening in the blockchain space right now, but do most of us understand what is it about? What is crypto mining? And how is blockchain applicable to businesses? The Singapore Blockchain & Dapps together with Hungry Lab is bringing this mini panel discussion, with invited cryto-miner Yan and the founder of Blockchain&Dapps will introduce the Ethereum blockchain 1. Businesses looking to use blockchain 2. Crypto Miners, who are they? 3.Blockchain concepts, ethereum, ethereum wallet and metamask.

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ENTRY LEVEL BLOCKCHAIN:
DEVELOPMENT & MINING
BUSINESS
Saturday 7 July

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Co-Working for Developers
Strong Reliable Wi-Fi
24 hour Access
Strong Coffee!
Great Partnerships

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LAB WITHOUT BORDERSBreaking down physical and financial barriers to access
Innovation & Risk-Taking
A safe, supportive digital platform where
entrepreneurs can learn, prepare and
take calculated risks
Take-to-Market
Market-ready testing ground
where entrepreneurs can obtain
user insight, build traction and
grow their audience.
Communication
Pick your own path, your own
pace and how you work with us.
Share problems, solutions and
bold ideas.
Best Practices
Democratizing access to leading
entrepreneurial methodologies,
mentorship and education.
The future we’re
building. Starting
today.

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Poor Planning Lack of Market Lack of Resources
• Poor business plan
• Insufficient runway
• Lack of metrics & data
• Insufficient contingencies
• Difficult business model
• Poor differentiation
• Poor customer targeting
• Insufficient demand
• Lack of feedback
• Disconnect between problem
and solution
• Too much competition
• Poor working capital
management
• Insufficient cash flow
• Lack of access to financing
• Lack of affordable support
• Lack of mentorship
• Inexperienced team
• Operational challenges
• Inability to pivot and/or adapt
• Acting on bad advice
• Inability to scale
• Giving up too soon
Poor Execution
THE PROBLEMWhy entrepreneurs fail

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THE SOLUTIONThe Hungry Lab Global VENTURE BUILDER +
GLOBAL ECOSYSTEM

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WE ARE THE CO-PARENTS
TO STARTUPS
SAFE SPACE LAUNCHPAD BUSINESS ADVISORY PERSONAL DEVELOPMENT

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THE HUNGRY LAB GLOBAL CORE TEAM
B I A N L I
Co-founder & CEO
G U S T A V O L I U
Co-founder & COO
CEO, The Hungry Lab Asia
S A U R A B V E R M A
Co-founder & CTO
C H R I S D A D E N
Technology Advisor
J O N A T H A N K A L B F E L D
Innovation Advisor
K e n n e t h H u
Blockchain & Dapps
D A V I D L I U
Digital Marketing
D E N N I S P O H
Legal & Accounting
L I S A M E R O N I
HR & Culture
A L E S H A F A Y E
Offshore Corp Sec

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Connecting Startups to The
World

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The Hungry Lab Singapore Partners
SEED Ventures

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ENTRY LEVEL BLOCKCHAIN:
DEVELOPMENT & MINING
BUSINESS
Saturday 7 July
Agenda
1.00 Welcome and Network
1.20 Intro
1.30 Mining Business
2.00 Entry Level Blockchain
2.45 Networking
3.00 End

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Hungry Talks:
MINING BUSINESS
Gustavo Liu
The Hungry Lab
SG Blockchain & Dapps
Yan Chia
Tropical Digits

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2017

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Is Mining Worthwhile Now?
• Mining Vs Buying and Holding
• 2 arbitrary dates – 1 Jan 2017 [US$8.14] to 31 Dec 2017 [US$741.13]
• US$10,000
• Mining: 229.51ETH = US$170, 096.75
• Buying and Holding: 1228.50ETH = US$910, 479.12
• Mining and Trading are Taxable
• Capital Gains Not Taxable

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Is Mining Worthwhile Now?
• 1 Jan Hashrates: 5962 GH/s Price: US$8.14 31 Jan Earnings: 67.46ETH
• 1 Feb Hashrates: 8226 GH/s Price: US$10.71 28 Feb Earnings: 48.89ETH
• 1 Mar Hashrates: 11193 GH/s Price: US$17.55 31 Mar Earnings: 35.93ETH
• 1 Apr Hashrates: 17342 GH/s Price: US$50.60 30 Apr Earnings: 23.19ETH
• 1 May Hashrates: 23205 GH/s Price: US$77.53 31 May Earnings: 17.33ETH
• 1 Jun Hashrates: 37244 GH/s Price: US$220.70 30 Jun Earnings: 10.79ETH
• 1 Jul Hashrates: 62556 GH/s Price: US$261.00 31 Jul Earnings: 6.42ETH
• 1 Aug Hashrates: 80820 GH/s Price: US$225.90 31 Aug Earnings: 4.97ETH
• 1 Sep Hashrates: 98985 GH/s Price: US$391.42 30 Sep Earnings: 4.06ETH
• 1 Oct Hashrates: 101856 GH/s Price: US$303.95 31 Oct Earnings: 3.94ETH
• 1 Nov Hashrates: 120477 GH/s Price: US$289.42 30 Nov Earnings: 3.33ETH
• 1 Dec Hashrates: 125492 GH/s Price: US$461.58 31 Dec Earnings: 3.20ETH Total: 229.51
• Assume US$10,000 = 5 Rigs = 750 MH/s = 5000W = US$0.13 per KWh = US$468 per month

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Hungry Talks:
MINING BUSINESS
Gustavo Liu
The Hungry Lab
SG Blockchain & Dapps
Yan Chia
Tropical Digits

18. Hello!
Kenneth Hu Sun Sagong Ivan Kukanov Gustavo Liu Serena Wang
Full stack/Blockchain
developer
Kenneth.hu@hotmail.com
Blockchain developer
,sagong.sun@gmail.com
Blockchain&AI developer
ivan@kukanov.com
Startup and Finance Coach
gustavo@asparagussprouts.com
Software developer
suaver.wang@gmail.com

19. Past event
• AI and Blockchain Fusion、AlphaWallet and Client-side wallets
• CryptoCurrency Wallets
• [March Event] Ethereum, Bitcoin and Atomic swaps payment
• Write Ethereum smart contract with Truffle Framework
• Ethereum : Decentralized Application Development workshop

20. Speaking
January 20, 2018
Blockchain and crypto meetup

21. Workshop
January 20, 2018
Decentralized Application Development workshop

22. Resource
http://bit.ly/2FMyov3
https://github.com/EtherSingapore/t
alks/issues
https://medium.com/singapore-
blockchain-dapps

23. Resourcehttp://bit.ly/2GjIt0o
https://www.meetup.com/BlockCha
in-Dapps-Technology/
http://bit.ly/2GcnE9x

24. How to find speaker
github.com/EtherSingapore/talks/issues

25. Join us as
• Speaker
• Medium Writer
• Videographer

26. Kenneth Hu
• I am a software developer , not trader.
• I am enthusiast, not expert.
• Ethereum, Bitcoin, AR, ChatBot
• Email: Kenneth.hu@Hotmail.com
• Blockchain&Dapps meetup
• Singapore IOTA meetup

27. How Blockchain work?
Ledger
Immutable
Transaction
Block
Chain
Mining
Consensus

28. What is transaction?
Kenneth Alice
$30 SGD
Transaction: “ is a transfer of value”

29. Ledger : “a collection of financial accounts or transactions”
Ledger
Kenneth Alice
#30
Amy Jen
#50
Immutable : The ledger cannot be changed. Ever!
What is ledger?What is Immutable?

30. What is block?
BLOCK
Block Header
Hash of previous
block header
Merkle root
Timestamp
Nonce
Transactions
Block : A block records some or all of the most recent transactions. Thus a block is like a
page of a ledger or record book.

31. Block header
BLOCK Header
Hash of previous
block header
Merkle root
Timestamp
Nonce
• Hash of previous block header
• Timestamp : It indicates when the
block was created.
• Merkle root : hash-based data
structure that is a generalization of the
hash list.
• Nonce :Counter used for the Proof of
Work algorithm. Each time you mine,
the nonce increases by 1 .

32. BLOCK 1
HEADER
Hash of previous
block header
Merkle root
Block 1
transactions
BLOCK 2
HEADER
Hash of previous
block header
Merkle root
Block 2
transactions
BLOCK 3
HEADER
Hash of previous
block header
Merkle root
Block 3
transactions
Blockchain

33. • Creating the candidate block
Mining
HASHING ( SHA256 )
Block’s Block header data
Hash of previous block
header
Merkle root
Timestamp
Nonce
No : (
Increment the nonce by 1.
Hash again!
Is hash (A8SBERA….) lower than the
target? (check the leading zeros)
YES! Problem Solved.
Proof of
Work

34. • Block header hash is less than the target
• Block size is within acceptable limits
• Block timestamp is less than two hours in the future.
• The first transaction is a coinbase transaction ( and only the first )
• The coinbase transaction has a valid reward.
• All transactions within the blocks are valid ( also have a checklist on their
own )
Source : https://dev.to/damcosset/blockchain-what-is-mining-2eod
Validate the new block

35. Node
Time
David  Sandra 5 BTC
Brian  List 3.02 BTC
Mary  Sandra 10 BTC
Lisa  Sandra 10 BTC
Sandra  David 10 BTC
BLOCK #187
Block ID
0x0235de9a6
Previous Block
0x6e257071cec
Transactions
Lisa  Sandra 10 BTC
Brian  List 5 BTC
Mary  Sandra 10 BTC
…… ……… .. BTC
BLOCK #186
Block ID
0x6e257071cec
Previous Block
0x1dcc4de8dec
Transactions
BLOCK #186
Block ID
0x6e257071cec
Previous Block
0x1dcc4de8dec
Transactions
BLOCK #186
Block ID
0x6e257071cec
Previous Block
0x1dcc4de8dec
Transactions
BLOCK #186
Block ID
0x6e257071cec
Previous Block
0x1dcc4de8dec
Transactions
Blockchain network
Blockchain

36. What does “distributed” mean ?
Distributed: A distributed ledger is a database that is consensually shared and
synchronized across network spread across multiple node
Ledger
Ledger
Ledger
Ledger
Ledger Ledger
node
node
node
nodenode
node

37. Demo

38. Is A blockchain the centralized, decentralized or
distributed application ?

39. What is Ethereum ?
• This is how Ethereum’s website defines itself:
• “Ethereum is a decentralized platform that runs smart contracts:
applications that run exactly as programmed without any possibility
of downtime, censorship, fraud or third party interference. These
apps run on a custom built blockchain, an enormously powerful
shared global infrastructure that can move value around and
represent the ownership of property.”

40. What is Metamask
• MetaMask is a bridge that allows you to visit the
ethereum network in your browser today. It allows you to
run Ethereum dApps right in your browser without
running a full Ethereum node.
• MetaMask includes a secure identity vault, providing a
user interface to manage your identities on different sites
and sign blockchain transactions.

41. MetaMask
• What’s METAMASK
• How to use METAMASK
• Create Account
• Import Accounts
• Private key
• JSON File
• Network

42. Ethereum blockchain Network
KOVAN
Ethereum
Wallet
RINKEBY
ROPSTEN
Mainnet

43. Network ID
Network Network ID Note
Main 1
Morden 2 Deprecated
Ropsten 3 POW
Rinkeby 4 POA, supported by geth only
Kovan 42 POA, supported by Parity only

44. Account

45. Create Account
Public Key
(Account)
Private Key
Main
Ropsten
Kovan
Rinkeby
0xe589….
0xe589….
0xe589….
0xe589….

46. Metamask - Export Account
• Export Account Export Private Key

47. Metamask - Export Account
• Export Account  Export Seed

48. Metamask - Import Account
• Private Key
• JSON File

49. Metamask - Network
• Main Ethereum Network
• Ropsten Test Network
• Kovan Test Network
• Rinkeby Test Network
• Localhost 8545
• Custom RPC

50. Metamask – Get Ether
• Ropsten faucet
• https://faucet.metamask.io/
• Kovan faucet
• https://gitter.im/kovan-testnet/faucet
• Rinkeby faucet
• https://faucet.rinkeby.io/
• Twitter
• Google
• Facebook

51. Dapps – Ethereum wallet
•https://wallet.ethereum.org

52. Dapps – Ethereum wallet
KOVAN
Ethereum
Wallet
RINKEBY
ROPSTEN
Mainnet

53. app.js
AlphaWallet
Servic
es
Power
ed
by:

54. app.js
Kenneth Demo site
• http://www.kennethhu.net/example/ethereum/index.html

55. Next event
• 7/24 The IOTA first meetup at wework
• 7/11 MateMask(Wallet ),Mining and consensus protocols and IOST
• Topic : MateMask (Ethereum Wallet)
Speaker : Dion - Business Development Executive, Katalyst pte ltd
Email: Dion95hc@gmail.com
Github : https://github.com/dionysusyan
Topic : Mining and consensus protocols
Speaker : Serena Wang
Email: suaver.wang@gmail.com
Topic : IOST x Bluehill – A unique Proof-of-Believability (PoB) consensus, a high-throughput
DApps platform and a USD50m incubator
Speakers: Xu Yang - IOST SEA Growth Lead / Lawrence Lim - IOST SEA Market Launcher
Emails: yang@iost.io / lawrence@iost.io

56. Next event
• 7/14 Workshop : Basic level (truffle)
• Simple coin Pet-shop

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Lynn Jamal
Community Ambassador
9270 8334
lynn@thecarrotpatch.co

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You don’t have to do it alone.
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