galoy-earn
  • Earn Overview
  • Chapter 101 - Bitcoin: What is it?
    • 101.1 Lesson - whatIsBitcoin
    • 101.2 Lesson - sat
    • 101.3 Lesson - whereBitcoinExist
    • 101.4 Lesson - whoControlsBitcoin
    • 101.5 Lesson - copyBitcoin
  • Chapter 102 - What is Money?
    • 102.1 Lesson - moneySocialAgreement
    • 102.2 Lesson - coincidenceOfWants
    • 102.3 Lesson - moneyEvolution
    • 102.4 Lesson - whyStonesShellGold
    • 102.5 Lesson - moneyIsImportant
    • 102.6 Lesson - moneyImportantGovernement
  • Chapter 103 - How Does Money Work?
    • 103.1 Lesson - WhatIsFiat
    • 103.2 Lesson - whyCareAboutFiatMoney
    • 103.3 Lesson - GovernementCanPrintMoney
    • 103.4 Lesson - FiatLosesValueOverTime
    • 103.5 Lesson - OtherIssues
  • Chapter 104 - Bitcoin: Why is it special?
    • 104.1 Lesson - LimitedSupply
    • 104.2 Lesson - Decentralized
    • 104.3 Lesson - NoCounterfeitMoney
    • 104.4 Lesson - HighlyDivisible
    • 104.5 Lesson - securePartOne
    • 104.6 Lesson - securePartTwo
  • Chapter 201 - The Origins of Money
    • 201.1 Lesson - originsOfMoney
    • 201.2 Lesson - primitiveMoney
    • 201.3 Lesson - anticipatingDemand
    • 201.4 Lesson - nashEquilibrium
    • 201.5 Lesson - singleStoreOfValue
  • Chapter 202 - Attributes of a good Store of Value
    • 202.1 Lesson - whatIsGoodSOV
    • 202.2 Lesson - durability
    • 202.3 Lesson - portability
    • 202.4 Lesson - fungibility
    • 202.5 Lesson - verifiability
    • 202.6 Lesson - divisibility
    • 202.7 Lesson - scarce
    • 202.8 Lesson - establishedHistory
    • 202.9 Lesson - censorshipResistance
  • Chapter 203 - The Evolution of Money I
    • 203.1 Lesson - evolutionMoney
    • 203.2 Lesson - collectible
    • 203.3 Lesson - storeOfValue
    • 203.4 Lesson - mediumOfExchange
    • 203.5 Lesson - unitOfAccount
    • 203.6 Lesson - partlyMonetized
    • 203.7 Lesson - monetizationStage
  • Chapter 204 - The Evolution of Money II
    • 204.1 Lesson - notFromGovernment
    • 204.2 Lesson - primaryFunction
    • 204.3 Lesson - monetaryMetals
    • 204.4 Lesson - stockToFlow
    • 204.5 Lesson - hardMoney
  • Chapter 205 - The Evolution of Money III
    • 205.1 Lesson - convergingOnGold
    • 205.2 Lesson - originsOfPaperMoney
    • 205.3 Lesson - fractionalReserve
    • 205.4 Lesson - bankRun
    • 205.5 Lesson - modernCentralBanking
    • 205.6 Lesson - goldBacked
    • 205.7 Lesson - brettonWoods
    • 205.8 Lesson - globalReserve
  • Chapter 206 - The Evolution of Money IV
    • 206.1 Lesson - nixonShock
    • 206.2 Lesson - fiatEra
    • 206.3 Lesson - digitalFiat
    • 206.4 Lesson - plasticCredit
    • 206.5 Lesson - doubleSpendProblem
    • 206.6 Lesson - satoshisBreakthrough
    • 206.7 Lesson - nativelyDigital
    • 206.8 Lesson - CBDCs
  • Chapter 301 - Bitcoin: Why was it created?
    • 301.1 Lesson - rootProblem
    • 301.2 Lesson - bitcoinCreator
    • 301.3 Lesson - fiatRequiresTrust
    • 301.4 Lesson - moneyPrinting
    • 301.5 Lesson - genesisBlock
    • 301.6 Lesson - cypherpunks
  • Chapter 302 - Bitcoin: How does it work?
    • 302.1 Lesson - peer2Peer
    • 302.2 Lesson - blockchain
    • 302.3 Lesson - privateKey
    • 302.4 Lesson - publicKey
    • 302.5 Lesson - mining
    • 302.6 Lesson - proofOfWork
    • 302.7 Lesson - difficultyAdjustment
    • 302.8 Lesson - halving
  • Chapter 401 - Lightning: What does it solve?
    • 401.1 Lesson - bitcoinDrawbacks
    • 401.2 Lesson - blocksizeWars
    • 401.3 Lesson - lightningNetwork
    • 401.4 Lesson - instantPayments
    • 401.5 Lesson - micropayments
    • 401.6 Lesson - scalability
    • 401.7 Lesson - paymentChannels
    • 401.8 Lesson - routing
  • Chapter 501 - Bitcoin Criticisms & Fallacies I
    • 501.1 Lesson - itsaBubble
    • 501.2 Lesson - itstooVolatile
    • 501.3 Lesson - itsnotBacked
    • 501.4 Lesson - willbecomeObsolete
    • 501.5 Lesson - toomuchEnergy
    • 501.6 Lesson - strandedEnergy
  • Chapter 502 - Bitcoin Criticisms & Fallacies II
    • 502.1 Lesson - internetDependent
    • 502.2 Lesson - forcrimeOnly
    • 502.3 Lesson - ponziScheme
    • 502.4 Lesson - bitcoinisTooSlow
    • 502.5 Lesson - supplyLimit
    • 502.6 Lesson - governmentBan
  • Chapter 503 - Bitcoin Criticisms & Fallacies III
    • 503.1 Lesson - concentratedOwnership
    • 503.2 Lesson - centralizedMining
    • 503.3 Lesson - tooExpensive
    • 503.4 Lesson - prohibitivelyHigh
    • 503.5 Lesson - willBeHoarded
    • 503.6 Lesson - canBeDuplicated
  • Chapter 601 - Bitcoin and Economics I
    • 601.1 Lesson - scarcity
    • 601.2 Lesson - monetaryPremium
    • 601.3 Lesson - greshamsLaw
    • 601.4 Lesson - thiersLaw
    • 601.5 Lesson - cantillonEffect
    • 601.6 Lesson - schellingPoint
  • Chapter 602 - Bitcoin and Economics II
    • 602.1 Lesson - opportunityCost
    • 602.2 Lesson - timePreference
    • 602.3 Lesson - impossibleTrinity
    • 602.4 Lesson - jevonsParadox
    • 602.5 Lesson - powerLaws
    • 602.6 Lesson - winnerTakeAll
  • Chapter 603 - Bitcoin and Economics III
    • 603.1 Lesson - unitBias
    • 603.2 Lesson - veblenGood
    • 603.3 Lesson - malinvestment
    • 603.4 Lesson - asymmetricPayoff
    • 603.5 Lesson - ansoffMatrix
  • README
  • LICENSE
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  1. Chapter 302 - Bitcoin: How does it work?

302.6 Lesson - proofOfWork

Screen: proofOfWork

Headline: Proof of Work

Reward: 3

Text: Decentralized systems, by definition, do not have a single source of truth.

Satoshi's breakthrough was to build a system that allows all participants to zero in on the same truth independently. Proof of work is what allows this to happen. The point of proof of work is to create an irrefutable history. If two histories compete, the one with the most work embedded in it wins.

The chain with the most work is the truth, by definition. This is called Nakamoto consensus. This works because work requires energy. In Bitcoin, work is computation. Not any kind of computation, but computation that has no shortcut: guessing.

In the absence of a central authority, proof of work is necessary because it ensures that there is no shortcut to adding transactions to the blockchain.

Miners must compete to solve the puzzle through brute force computation, which is probabilistic in nature, and the proof that the work has been done becomes self-evident in the outcome of the work. This makes it very difficult for any one person or group to manipulate the transaction history.

=================================================================

QUIZ

Question: How does the Bitcoin network create a source of truth despite having no central authority?

Answer: Through proof of work, which involves miners competing to solve a mathematical puzzle

Feedback: Correct! Congrats on understanding how the bitcoin network creates a source of truth that cannot be manipulated by wealthy elites or insiders

Correct: true

Answer: By holding a lottery among all those that have bitcoins in a wallet

Feedback: No, this would be proof of stake, which is a different consensus mechanism that involves choosing the next block producer proportional to their stake (how many coins they hold) in the network. Try again

Correct: false

Answer: Through a process of majority voting

Feedback: Wrong, but it's an interesting idea. The bitcoin network does not use a process of majority voting to create a source of truth. Try again!

Correct: false

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Last updated 1 year ago