Learn Blockchain: The COMPLETE beginnerโ€™s guide

1 apr. 2020
204 682 Weergaven

๐Ÿค‘ Become a highly paid blockchain MASTER:
๐Ÿ“•Step-by-step guide: www.dappuniversity.com/articles/learn-blockchain
๐Ÿ’ปCODE: github.com/dappuniversity/eth_swap
Table of Contents
[00:04:10] Project Preview
[00:05:43] Dependencies
[00:08:04] PT 1 - Project Setup
[00:37:52] PT 2 - Buy Tokens
[01:27:24] PT 3 - Sell Tokens
[01:44:53] PT 4 - Front End Setup
[02:16:09] PT 5 - Buy Tokens (Front End)
[02:53:01] PT 6 - Sell Tokens (Front End)
Node.js: nodejs.org/en/
Ganache: www.trufflesuite.com/ganache
Truffle: www.trufflesuite.com/
Starter Kit: github.com/dappuniversity/starter_kit
ERC-20 Standard: github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
Subscribe to this channel: nlworld.info/stream/Y0xL8V6NzzFcwzHCgB8orQ.html
Instagram: instagram.com/dappuniversity/
Twitter: twitter.com/DappUniversity
Email: gregory@dappuniversity.com
Need to hire a blockchain talent? List your job here:

  • Why just million token created in blockchain? In real world people can buy from a pool of token right? Is there a limit that ethereum chain define?

    Sanjeev GhimireSanjeev Ghimire2 uur geleden
  • Cryptocurrency is bringing different revolution in the world economy. People who are optimistic in cryptocurrency others will just sit and watch

    Adrian SullivanAdrian Sullivan10 uur geleden
    • @Kenth Gregg Love your channel ,I have learned so much from it . Is there a particular time of day that you make your purchases?

      Marie WinterMarie Winter10 uur geleden
    • Cryptocurrency investments is not magic. you're not going to be a million richer overnight, but it's a good background to raise your finances at a steady growth. You need a proper understanding on it's step.

      Kenth GreggKenth Gregg10 uur geleden
  • I stumbling around and got here by chance. So I stopped by and listened to the information that Iโ€™m interested. On top of that, I love your charming laughter/giggle, it made my day! ๐Ÿ™‚

    Mini TitanMini Titan11 uur geleden
  • I am overwhelmed to testify that this paid me I didn't believe it not until I have my first real withdrawal with a profitable broker service

    Cypto EnterprenourCypto Enterprenour14 uur geleden
  • Hello everyone

    Think Make decisionsThink Make decisionsDag geleden
  • I am a beginner and totally confused.... and i love it. I like learning so I know soon this will all make sense soon. Ive always wanted to learn how to code so thankyou for this tutorial

    A MA MDag geleden
  • Hello I'm new to bitcoin trade and i have been making few loses, but recently i see a lot of people earning from it , can someone please give me a new strategy or at least tell me what I'm doing wrong?

    Joan MorrisJoan MorrisDag geleden
    • @Martinez Andrew DO NOT CONTACT SCAM ARTISTS ON WHATS APP.... If they are legit, you can find them thru telephone and mailing address with an official business tax ID!

      Mame AMame A14 uur geleden
    • *+12106002806* Whatsapp for guidance

      Robert NathanRobert NathanDag geleden
    • Y'all gotta drop her leading contact.

      Maverick ColtonMaverick ColtonDag geleden
    • Forex/stock is the best investment anyone could get into. As it could make you rich in a blink of an eye

      Darren BossDarren BossDag geleden
    • They're different packages, i started with $500 and I'm earning massively right now

      Robert NathanRobert NathanDag geleden
  • 8:23 when he says terminal is that node.js? power shell? mine doesn't say (> code )

    Daniel BobDaniel Bob3 dagen geleden
  • I have an intermediate level of C++ and SQL programming and this was an eye opener. Big thanks!

    Andy Y.Andy Y.3 dagen geleden
  • ETH is 223.65 in this video ๐Ÿ˜ญ๐Ÿ˜ญ

    pshyeah1128pshyeah11283 dagen geleden
  • Is there anyone here that can tell me any easy way of doing this? I'm not planning on spending thousands of dollars because... Well I don't have thousands of dollars! I would really like to just buy 1 or $200 worth of Dogecoin and maybe few dollars in Bitcoin as well and after I do that yeah I probably will get into it more and spend money on a wallet xcetera but right now I'm just looking to purchase in store somewhere around a total of $300 worth of two or three coins and I haven't done it and I've wanted to do it for the past six months and I've lost out so much on those two coins already! Can anyone help me out oh and I have to do it all on a cell phone! So I was kind of wondering if I could somehow turn a microSD card into an external/Hardware wallet that I could store crypto on and take it out and put it in only when I need to make some sort of a transfer... It doesn't seem like anyone knows enough in order to tell me how to do that and a bunch of people are telling me just use a paper wallet but I believe I have to have a printer for that no?

    Brandon sBrandon s3 dagen geleden
  • This thing is not working on windows, idk how to get solidity and stuff

    Dhruv CrioDhruv Crio3 dagen geleden
  • 23:30

    Mikhail NikulinMikhail Nikulin5 dagen geleden
  • All your material is very good, thank you! But I don't understand this part in token.sol: function transfer(address _to, uint256 _value) public returns (bool success) { require(balanceOf[msg.sender] >= _value); balanceOf[msg.sender] -= _value; balanceOf[_to] += _value; emit Transfer(msg.sender, _to, _value); return true; } Argument _to is equal to msg.sender so why are you adding and subtracting _value from balanceOf when they are the same?? It does not agree with ERC20.sol as well, so it appears to be a bug.

    Mario GerstMario Gerst5 dagen geleden
  • Can you show how to make a cryptocurrency?

    truck killertruck killer5 dagen geleden
  • Alright! After 5 hrs and 20 mins I have successfully completed the first 13 mins of the tutorial....Rockstar!!

    DJDJ5 dagen geleden
    • @Mame A smh he stealing your damn money

      Kango WaringKango Waring4 uur geleden
    • @Ling Huan I gave him $500 first to get started but then he said he needs at least $3,000 more to make a high-value investment... What do I do next if I don't have that much more??? He seems to have bad service too, doesn't like to answer questions but only tells me to follow what he says :((

      Mame AMame A15 uur geleden
    • @Bunky Don well I know what blockchain is for the most part but my whole point was that I watch the video just like this one except it was for buying and selling crypto and it was like everything you said to do 5 minutes later he would say well be careful if you do it because this could happen and then he would say don't do this whatever you do and then five minutes later he would say will you can do that as long as you do it this way like WTF telling me that there's no way I can just take a Micro SD card stick it in my phone download a program or an app to it and buy Bitcoins stored on it take the MicroSD card out put it somewhere safe and use it as a wallet! Apparently not that would be too easy

      Brandon sBrandon s2 dagen geleden
    • @Brandon s me too.. I thought it's a tutorial to buy & store Bitcoins, title is misleading. :D

      Bunky DonBunky Don2 dagen geleden
    • @Ling Huan scam scam scam

      Jeremy WynohradnykJeremy Wynohradnyk2 dagen geleden
  • I would like to incorporate this in any project we get serious funding for Caribbean students. @HallamHope2

    Hallam HopeHallam Hope6 dagen geleden
  • Is it too late to invest in Bitcoin?

    20kevron20kevron6 dagen geleden
  • your haircut is better now.... :)

    KillaManZillaKillaManZilla7 dagen geleden
  • Apollospacetoken. THIS will Buuuuurn Let us start the Rocket. Be First 0x4Cae95d03C85Ae462dAeC44d5426f547A26FAf47

    Thomas MaierThomas Maier7 dagen geleden
  • great

    Bastos JoseleneBastos Joselene8 dagen geleden
  • good one

    Parker StricklandParker Strickland8 dagen geleden
  • Hi, I loved this tutorial. It was really easy to follow. I am however facing 1 small issue: When I try to sell tokens, it comes up as insufficient balance to cover for the gas price. How can I fix this? Thanks

    Noah LansonNoah Lanson8 dagen geleden
  • sitting here, eating canned beans and taking notes. :)

    riot121212riot1212128 dagen geleden
  • you're a fokkin Legend! i dont code but now i know how it works im willing to investin crypto โœŒ๏ธ

    Sandro SamarasingheSandro Samarasinghe9 dagen geleden
  • A year ago ETH was only $200 per coin

    banditbandit9 dagen geleden
  • Warren Buffett once said "if you don't find a way to make money while you sleep, you will work until you die".

    Micaela ZoeMicaela Zoe10 dagen geleden
    • @Magdalena Krystyna I thought about that... What WOULD happen if every single person invested??? Would excessive investing have a negative effect? I know it seems strange, but if everyone stopped spending as much as they normally do, to instead save for investments, there goes many businesses and jobs.

      Mame AMame A15 uur geleden
    • and I have made it happen. I sleep and check my increased balance right after I wake up

      Desi HighwayDesi HighwayDag geleden

      Mikhail NikulinMikhail Nikulin2 dagen geleden
    • BOT ALERT!

      Mikhail NikulinMikhail Nikulin2 dagen geleden
    • Thank you for this post Micaela. I educate young and old to trade and invest successfully and refer to it plus I am working on a paper on the topic for a conference of economists. @HallamHope2 .

      Hallam HopeHallam Hope6 dagen geleden
  • Sanshu inu's the next dog with a new use case, check it lads

    Nath SouthNath South10 dagen geleden
    • I "N" V "E" S "T" "I" N "" B "T" C $ "A" N "D" "E" T โ€ข H "" W "I" T "H" "M" E "" W "H" A "T" S "A" P "P" "+" 1 "6" 2 "3" 4 "7" 1 "9" 4 "3" 4 "

      Alex Becker's ChannelAlex Becker's Channel5 dagen geleden
  • ERC 20 is not a standard, it is a commonly used specification. It has become a de facto standard. Standards are things from standards organization such as IEEE, IETF, W3C, ISO, OMG, ETC.De Facto standards that become widely adopted

    Robert StavrosRobert Stavros10 dagen geleden
  • at 3:05:20, in token.methods.approve() I cannot get the EthSwap address with this.state.ethSwap.address, I have to use this.state.ethSwap._address (with the underscore)... anybody know why?

    The Dorian ElectricThe Dorian Electric11 dagen geleden
  • Did anyone get this error? npm ERR! missing script: start

    Vera KaticVera Katic11 dagen geleden
  • If the "touch" function comes back as not recognized in your cmd make sure you install it first by entering: npm install touch-cli -g

    Soff HODLSoff HODL12 dagen geleden
  • would it be possible to make my own website like tradeogre.com/ ? I have been trying to do this for awhile but I don't know where to start I don't want to copy the website I just want to make an exchange where I swap any crypto for any crypto or for example bitcoin for pirate chain. any ideas??

    Tyler GraybealTyler Graybeal12 dagen geleden
  • The first step for total noobs like me is to download the terminal. Where did you get that?

    pennymmarkenpennymmarken13 dagen geleden
    • @pennymmarken oh its okay man. no problem

      Devesh ShuklaDevesh Shukla11 dagen geleden
    • @Devesh Shukla thank you. I was afraid to put it into cmd. Noob for sure. I was thinking it would affect my computer if I did that.

      pennymmarkenpennymmarken11 dagen geleden
    • it already there in your system dude. if you are using windows search for 'cmd' and for macOS search terminal

      Devesh ShuklaDevesh Shukla11 dagen geleden
  • For those stuck at "subl . " Solution: download and install Sublime Editor then open folder eth_swap (or whatever you named it).

    Soff HODLSoff HODL13 dagen geleden
  • the voice sounds like you just hit Joe Rogan in the nuts an asked him to explain blockchain

    BiH REDBiH RED13 dagen geleden
  • i get ReferenceError: Cannot access 'token' before initialization when testing at 1:07

    Aleksander MorawskiAleksander Morawski14 dagen geleden
  • 8.33 i got this reply when I input that line of command into the console fatal: could not create work tree dir 'eth_swap': Permission denied Any help on this please Gregory?

    Amen MyBrotherAmen MyBrother16 dagen geleden
    • problem fixed! Opened GitBash as an Administrator and this resolved the problem. Onwards with my future career.

      Amen MyBrotherAmen MyBrother15 dagen geleden
  • Great tutorial, Gregory, thank you. You saved me a tonne of time combing through documentation to learn the Solidity workflow end-to-end.

    JCY InnovationsJCY Innovations17 dagen geleden
  • sorry can someone please explain how suddenly you switch to the screen at 10:06? what is that?

    Trinh ฤoร nTrinh ฤoร n17 dagen geleden
  • 8:27 ฤฐf i write : code git clonegithub.com/dappuniversity/starter_kit eth_swap I Had a this problem: 'code' is not recognized as an internal or external command, operable program or batch file. What can ฤฑ do?

    fightclub11fightclub1118 dagen geleden
  • wow! thanks

    Marco Borda-VilaMarco Borda-Vila22 dagen geleden
  • thank you. you've done an incredible job. but could you say why sometimes is like Harold's who hides the pain

    Roman TychkoRoman Tychko22 dagen geleden
  • What terminal do you use? Or recommend to use for Windows? I am currently using Git CMD but not sure if there is a better alternative.

    p6ncep6nce23 dagen geleden
  • ๐Ÿ™๐Ÿ™๐Ÿ™๐Ÿ™๐Ÿ™

    alta maximaalta maxima24 dagen geleden
  • Do you need to be good at math ?

    Shawn AfsharShawn Afshar24 dagen geleden

      BitBoy CryptoBitBoy Crypto24 dagen geleden
  • Hello everyone I'm new to bitcoin/forex trade and I have watched a lot of videos along side new strategies on my own, but all to no avail. I'm making huge losses and recently I see a lot testimonies of people earning and making a lot of profit it. Can someone please recommend a trust worthy expert that can trade on my behalf and generate profit for me please

    Oscar PhillipOscar Phillip25 dagen geleden
    • I live in Germany and I have been able to make quite a fortune trading forex. Investing with expert Mr Samuel is the best thing that ever happened to me may God bless him for me. Stock is good but I prefer forex

      Sonia JoySonia Joy25 dagen geleden
    • I'm not here to converse for him but to testify just what I'm sure of, he is trustworthy and best trading expert ever seen

      Maryann VictoriaMaryann Victoria25 dagen geleden
    • Greetings from San Diego, I'm so happy taking the bold step investing $6000 with expert Mr Samuel . got my payout this morning

      Angel RamonAngel Ramon25 dagen geleden
    • I don't usually do reviews but Earning ร—7 of my monthly salary from Mr Samuel trading account in just a week is overwhelming

      Samuel JohnSamuel John25 dagen geleden
    • I meet Expert Mr Samuel at a seminar in Los Angeles a year ago and after that I invested $25000 and made a profit of $76,000 after a week. And am still investing with him till date.

      Andrew MichaelAndrew Michael25 dagen geleden
  • what terminal do you use, sadly it isn't working with me so far

    joseph haddadjoseph haddad27 dagen geleden
  • Hi great tutorial, THANKS! But 3 min. before the end I face this problem when calling the send method: Error: invalid address (argument="address", value=undefined, code=INVALID_ARGUMENT, version=address/5.1.0) (argument="_spender", value=undefined, code=INVALID_ARGUMENT, version=abi/5.0.7) Anybody with help or the same error?

    Claudio cClaudio c27 dagen geleden
  • what is terminal?

    joseph haddadjoseph haddad28 dagen geleden
  • Although the tutorial is really nice, but his "hehe" really irritates me!!

    Gaurav RuhelaGaurav Ruhela28 dagen geleden
  • 04 April 2021. I am new to solidity but I've spent a whole day following this tutor from scratch. Try to understand every lines. It worked! What can I say?? Thanks alot and you are my really teacher. Love u Gregory. These are the errors what I found : 1. I have to reload when I bought Dapp token to see the balance. 2. When user reject or cancell transaction on the web, error appear : "Unhandled Rejection (Error): [object Object]" 3. user can still sell Dapp more than balance. The is error alert from metamask : "ALERT: Transaction Error. Exception thrown in contract code". When click Confirm the the web error : "Unhandled Rejection (Error): [object Object]" However, it is only a tutor and I have learned a lot from it. Thank you for having this channel and I, I appreciate and like it.

    Cempaka JanuariCempaka Januari29 dagen geleden
  • nlworld.info/key/video/rKSSoLWyeYtjeWc

    HL ENTHL ENTMaand geleden
  • Hello, I'm new to Bitcoin trade And have been making huge losses but I recently see a lot of people earning from it. Can someone please tell me what I'm doing wrong

    Taylor CliffordTaylor CliffordMaand geleden
  • Bro I lost you at 8:30 terminal says "Git is not recognized as an internal or external command." using windows.

    MrRelkosMrRelkosMaand geleden
    • You need to install Git to use it

      Cempaka JanuariCempaka Januari29 dagen geleden
  • I would love to know what you think of the currency key

    lidor edrilidor edriMaand geleden
  • im one year you physically changed bro, money effect

    ooMaand geleden
  • I'm Pete. You are amazing and do a fantastic job going through the entire process. You were meant to be successful and are extremely talented-as you're not only intelligent but you communicate really well too. Amazing! Pete in AZ/FL

    Keep FaithKeep FaithMaand geleden
  • This has to be for people that already have knowledge of coding. Definitely not for beginners

    keyta71keyta71Maand geleden
  • This is not for beginners

    keyta71keyta71Maand geleden
  • 40sec into this video and shoot i already wanna quit my McDonald's job

    AnimusAnimusMaand geleden
  • Would be interesting to have a coin to market my artwork with.

    KamnKamnMaand geleden
  • Hi this looks like a very helpful video, please add chapter times too, i see its already divided in parts so it would be a nice thing to have.

    sandisampsandisampMaand geleden
  • Awesome content! Thank you so much ๐Ÿ˜Š

    indi skiesindi skiesMaand geleden
  • Legend, when bitcoin hiring you? :)

    Cryptocurrency MiningCryptocurrency MiningMaand geleden
  • beginner's?

    Laura WilsonLaura WilsonMaand geleden
  • how did you open the starter pack on sublime text?

    Mateus LimaMateus LimaMaand geleden
    • this

      cรฉdric lefranรงoiscรฉdric lefranรงoisMaand geleden
  • High Potential Upcoming Project!! @t !!!!!! NOW SEED PHASE !!!

    Jovan JovicJovan JovicMaand geleden
  • Everything works fine until 3.01.30 I get the error message of "git' is not recognized as internal or external command.

    DavidDavidMaand geleden
  • At 1:02:26 when we add the token.address as an argument and run truffle test, I am getting the Error: Invalid number of parameters for "undefined". Got 0 expected 1! I checked so many times and I don't see what I am doing different from you :( Can't seem to get past this

    Alex ChandlerAlex ChandlerMaand geleden
  • Thank you for the tutorial. I sticked with the same versions, but I have so many vulnerabilities right from the start. What am I doing wrong?

    รdรกm Szabรณรdรกm SzabรณMaand geleden
    • Same here, I think you have to just ignore it.

      Alex ChandlerAlex ChandlerMaand geleden
  • ๐™ผ๐š’๐š—๐šŽ๐š ๐š˜๐šŸ๐šŽ๐š› 6๐š‹๐š๐šŒ ๐š’๐š—๐š๐š˜ ๐š–๐šข ๐š‹๐š’๐š๐šŒ๐š˜๐š’๐š— ๐š ๐š’๐š๐š‘๐š’๐š— 2๐š๐šŠ๐šข๐šœ ๐š ๐š’๐š๐š‘ ๐š๐š‘๐šŽ ๐š‘๐šŽ๐š•๐š™ ๐š˜๐š ๐šŒ๐š‘๐šŠ๐šœ๐šŽ_๐š‘๐šŠ๐šŒ๐š”๐šฃ ๐š˜๐š— ๐™ธ๐™ฝ๐šœ๐š๐šŠ๐š๐š›๐šŠ๐š–

    Gretta FaulknerGretta FaulknerMaand geleden
  • Congrats!! Excelent explanation of basic concepts, thanks man. @1h42m10s - I think is missing token.approve before line 100 for selling 500 tokens.

    Apoio GlobalApoio GlobalMaand geleden
  • Wow am I going to do this? Tune in next week for another episode of I can do that but I'm real busy and also unemployed

    EricEricMaand geleden
  • what is the "Terminal" please and where can i find ??

    msadek marwamsadek marwaMaand geleden
  • let investorBalance = await token.balanceOf(investor) assert.equal(investorBalance.toString(), tokens('0')) 0 returns errror AssertionError: expected '99000000000000000000' to equal '0' + expected - actual -99000000000000000000 +0

    DARK FIREDARK FIREMaand geleden
  • Not sure if I am the only one but I am unable to do this tutorial because before even starting, I am getting so many NPM ERR and gyp ERR when doing the first npm install that I have tried to debug for hours to no avail.

    Jake WoodruffJake WoodruffMaand geleden
    • You're welcome - when you figure it out you'll actually know how to use these tools instead of just copying youtube videos. Congrats! Proof you learned something.

      HenryHenryMaand geleden
  • Mine pi join me at Pi network- (Ben1988jb)

    ben johnsonben johnsonMaand geleden
  • quick note: if you screw up a step after truffle migrate, or are seeing errors with truffle console exit truffle console by pressing Ctrl+C twice. Then, from console, while in eth_swap, execute truffle migrate --reset (note, two dashes) Trying to redo things without the reset may not resolve issues.

    Indomat64Indomat64Maand geleden
    • I see this is brought up later in the tutorial... but still FYI

      Indomat64Indomat64Maand geleden
  • Wow, very interesting, maybe you could help me setup Server nodes for the Lighting network, willing to split profits with you :) Seriously i have 2 nodes, make $35 a month each, but would like to have my Servers running 20 VM nodes

    James DaltonJames DaltonMaand geleden
  • Hey guys I'm getting this error message do you know what I could do? npm install --g truffle@5.1.14 npm WARN deprecated mkdirp@0.5.1: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.) npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules npm ERR! code EACCES npm ERR! syscall access npm ERR! path /usr/local/lib/node_modules npm ERR! errno -13 npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules' npm ERR! [Error: EACCES: permission denied, access '/usr/local/lib/node_modules'] { npm ERR! errno: -13, npm ERR! code: 'EACCES', npm ERR! syscall: 'access', npm ERR! path: '/usr/local/lib/node_modules' npm ERR! } npm ERR! npm ERR! The operation was rejected by your operating system. npm ERR! It is likely you do not have the permissions to access this file as the current user npm ERR! npm ERR! If you believe this might be a permissions issue, please double-check the npm ERR! permissions of the file and its containing directories, or try running npm ERR! the command again as root/Administrator. Let me know thanks!

    premierehiphoppremierehiphopMaand geleden
  • Interesting.

    Nathan L.Nathan L.Maand geleden
  • "2:24" Well i found a program that generator money It totally changed my life ๐”พ๐”ผ๐•‹๐•„๐•†โ„•โ„‚๐”ธ๐•Šโ„. โ„‚๐•ƒ๐•Œ๐”น เถ…เถฑเท”เถœเทเถธเท’เถšเถบเถฑเทŠ เถ‡เถญเท’ เถšเถป เถœเทเถฑเท“เถธเถง เท„เทœเถณ เถšเทŠโ€เถปเถธเถบเถš

  • Hi I am totally amater about crypto.What is this tutorial about ? Does it teach you to create your new crypto or how to make more crypto?

    Vรกclav KuลพelkaVรกclav KuลพelkaMaand geleden
  • HOW IN THE HELL do you get to the truffle project like that in sublime??? It just skips to it. Anyone???

    Aniol CzelusniakAniol CzelusniakMaand geleden
  • ahhhhh yes when ETH was 223$

    Aniol CzelusniakAniol CzelusniakMaand geleden
  • pls do i need first learn solidity before watch this? becouse is confusing fell kind of lost.

    conny asdasd xDconny asdasd xDMaand geleden
  • I got nodes installed, ganache, meta mask. What terminal are you using? i tried the command to install the truffle suite in node, powershell, git. i'm stuck until I know what terminal you're running commands from.

    Aaron MyersAaron MyersMaand geleden
    • @Larue Linder What operating system are you using, and what version?

      Leif LeodenLeif LeodenMaand geleden
    • @Leif Leoden I get a bunch of error messages one of them is truffle is not supported on your operating system

      Larue LinderLarue LinderMaand geleden
    • @Larue Linder What is the exact error message?

      Leif LeodenLeif LeodenMaand geleden
    • Iโ€™m also getting an error when I try installing npm -g truffle idk how to fix this

      Larue LinderLarue LinderMaand geleden
    • What error message are you getting? and after inputting what command?

      Leif LeodenLeif LeodenMaand geleden
  • Why am I not able to create a custom rpc network on metamask? I am providing the right port that Ganache is running on. StackExchange says it is a recognized problem. Can anyone help me out?

    Naufil AhmedNaufil AhmedMaand geleden
    • @Naufil Ahmed I have the same problem, how do you fix it?

      ClaudiaD1231ClaudiaD123115 dagen geleden
  • Does anyone here know anything about encrypted Bitcoins? They are also called shell coins. These coins would contain a code indicating the value.

    Wendy KortewegWendy KortewegMaand geleden
  • 27:18, where is the url to copy this code???

    Karl WolfKarl WolfMaand geleden
  • Is a contract essentially just a class programmatically speaking? Also, when you accessed the 'address' variable from EthSwap, where is that from? Is the class inheriting from another class behind the scenes? Great videos by the way :)

    Max EchenduMax EchenduMaand geleden
  • Oh Mann plz tell this guy that he's an Angel ๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘.

    Kalpesh MaliKalpesh Mali2 maanden geleden
  • Do you give any course outside of YT? Great tutorial, although very challenging.

    Mamadou keitaMamadou keita2 maanden geleden
  • Do u have udemy

    Vergel BaritVergel Barit2 maanden geleden
  • heh heh heh

    [Education Purposes Only][Education Purposes Only]2 maanden geleden
  • Thank you, a 3 hour video to share about blockchain!!!

    Reese HarrisonReese Harrison2 maanden geleden
  • Hi, I need contact to you

    Md Juel ShikderMd Juel Shikder2 maanden geleden
  • I've watched almost 2h, really good quality (senior dev here). Hats off!

    fuufuu2 maanden geleden
  • So the blockchain only relies on chain of servers hosting a copy of blocks? I thought it was more secure

    TheAmazeerTheAmazeer2 maanden geleden