by

Where communities thrive


  • Join over 1.5M+ people
  • Join over 100K+ communities
  • Free without limits
  • Create your own community
People
Activity
  • Jun 05 2016 10:31
    @alexvandesande banned @adamskee
  • Mar 16 2016 01:12
    @alexvandesande banned @scbosse
Sriram Kumar
@batteringram01
Right. I am building a simple usecase, 3 node setup with two accounts and one DAO contract(bank) which will hold some $ for each of the account, now the user can withdraw the dollars as ethers(wei) into their account. Thats do-able right? @makoto - doing this just to get a hang of things . i m super new :D
Makoto Inoue
@makoto
@batteringram01 I am not sure how you can programmatically send $ to contract. you may be able to do it BTC -> ETHER via http://btcrelay.org/ though I've never tried
Pi Delport
@PiDelport
@batteringram01: That's the gist of it. You always have to trust the issuer of any token to give it meaning, in any system: a block chain / consensus system is just a way to communicate and exchange those tokens in a secure and decentralized fashion.
Sriram Kumar
@batteringram01
Got it @pjdelport
Makoto Inoue
@makoto

Hello.

I have a question about general strategy of writing multiple contracts.

Something like http://ethereum.org/token tutorial assumes that you have one contract which manages all the available tokens.
What if you want to create multiple contracts that have same functions but different initializer values?

For example, A 101 Noob Intro to Programming Smart Contracts on Ethereum,
has a contract example called Conference which manages buying/refunding tickets of one conference.
The contract is like https://gist.github.com/makoto/1be1b1b6dc5c5dcf1e48e734d69053a8 .

What if I want to write a service like meetup.com or eventbrite on top of blockchain so that I can let organisers to create conference contract which has same functions but different ticket prices, venue capacities, and so on?
Do I need to compile/deploy new contract every time new conference is organised, or is it possible to create some sort of master contract which can fork multiple conference contracts?

An advise is appreciated.

PS: Apologies for cross post across multiple channels.
Sriram Kumar
@batteringram01
guys, have a doubt, Like i said, I have a 3 node private setup with one node exclusively for mining. Its all set and works. Now I am using truffle to write a token, I make the msg.sender get 10k coins, now how do I add the coin to the receivers wallet as I need to send and it must reflect there
when I check balance with "" on the unit place, it returns all the units, so will it be listed there?
(pardon me if I am getting my fundamental concepts wrong)
Sriram Kumar
@batteringram01
When I try to add some 1000 of my coins(token) it gets added in testrpc, but when I do that on my private bc, it does now.
not*
Alex Van de Sande
@alexvandesande
@makoto you can create a single master contract that has all the conferences, prices etc parametriized in
BitSpread
@BitSpread_twitter
Hello, how can I upgrade my existing Wallet to the latest Wallet version?
Makoto Inoue
@makoto
@alexvandesande thanks!
Alex Van de Sande
@alexvandesande
@BitSpread_twitter just download the new one and run
Makoto Inoue
@makoto
@alexvandesande btw are there any diagram that explains the relationship of various component (mist, geth, solidity, web3, etc) to newbies? I have our study group this evening, so I thought I should give some 15 min super intro to go through terminologies
Alex Van de Sande
@alexvandesande
@makoto unfortunately no. But if you build one it be helpful
Makoto Inoue
@makoto
I remember someone from ConsenSys made one but cannot remember the url :(
Alex Van de Sande
@alexvandesande
solidity: language
web3: javascript object used to connect to the node and compile solidity
geth: runs the node, connects to the network, execute transactions. The meat.
wallet: a dapp that uses web3 to watch wallets and send transactions
mist: an electron app that allows you to use html apps on ethereum. Currently only displays the wallet app
Makoto Inoue
@makoto
yeah, that's the minimum you need to know, I guess
Sriram Kumar
@batteringram01
Yeah I can help @makoto @alexvandesande I was thinking the same.
Alex Van de Sande
@alexvandesande
Thanks @makoto please post the result on reddit.com/r/ethereum !
Makoto Inoue
@makoto
I made a quick one at https://docs.google.com/presentation/d/16KBFTskiBovLY2NL_JCPNEWObQ8iPxbB181mc0_WaKU/ Any comments welcome before I post on reddit
Alex Van de Sande
@alexvandesande
@makoto that’s very good. Accurate, no comments.
XuannyLee
@XuannyLee
Hi, What should I do if I forgot password of my wallet? :worried:
Alex Van de Sande
@alexvandesande
@XuannyLee take a meditative walk and try to remember it. If there’s a substantial amount of money, contact a wallet brute force specialist to try to extract it for you. Be careful and find someone with a high reputation
There’s no way for anyone else to recover or change it
aketekt
@aketekt
Hey nice to meet everyone!
aketekt
@aketekt
Which frameworks (if any) are people using to build dapps right now? Is meteor still a good choice?
I'm looking at embark and truffle as frameworks choices. Anyone developing with them right now?
BitSpread
@BitSpread_twitter
Thanks @alexvandesande
Not sure it is a OS issue, but using the latest Mist downloadable Wallet 0.7.2, we noticed issues on Mac when transferring Digital Tokens. Tokens were "sent" and did not appear in transactions. We had enough gas to make the transfer. It seems to work on Windows. Has anybody got the same issue?
MMPRuser
@mmpruser_twitter
@alexvandesande thank you for that.
XuannyLee
@XuannyLee
@alexvandesande Thank you.
bitcoinmeetups.org
@bitcoinmeetups
It would be nice to see this page updated with some images and perhaps another UI. It's important that Ethereum gets high quality and abundant Dapps that do get exposure. http://dapps.ethercasts.com/
delorule
@delorule
Q: Contract with 2 owners. One owner try to make transfer. How other must confirm it? Which function of contract? Function "confirm" has parameter "h", but transaction of first owner is not work as value, transfer not complete (sorry for my English)
Alex Van de Sande
@alexvandesande
Contract wallet on the wallet client? Just click confirm?
delorule
@delorule
On the Mist. Second owner is other account in the same wallet. First owner confirmed by clicking. But there is no button for second owner confirmation
Alex Van de Sande
@alexvandesande
click the confirmed button again, it should allow you to select which account to approve it with
delorule
@delorule
There is buttons "Cancel" and "Send transaction" only. And field for password.
Alex Van de Sande
@alexvandesande
After a few minutes at most, a “confirmation pending” transaction should be at the top
delorule
@delorule
I'll try one more, thanks
delorule
@delorule
a “confirmation pending” transaction should be at the top
Nothing. Maybe the problem is both owners in one wallet? My ETH is freezing becuase of this experiment with second owner.
Sriram Kumar
@batteringram01
I have a fundamental doubt about DAOs and tokens, so lets say I have existing customer base and I provide some sort of a service/product. I want to give some value added service - so I could issue gift cards to them(or loyalty points scenario) now I could issue each token(which are coins) some value to ethers? So, I give 5 tokens in the giftcard or 5 tokens for 10 points, now where will the user exchange 5 tokens and get dollars or ethers or BTC?
I have a DAO which will automatically issue some tokens into the gift card or will send it to the user's wallet. How will the user redeem it?
Alex Van de Sande
@alexvandesande
@batteringram01 you can use ethereum to create tokens and gift cards, and you can use ether to fund them to real world value. But where that ether comes from and how you set up exchange rates it’s up to your dao
Sriram Kumar
@batteringram01

So let us look into a scenario, like I said I have 500 customers, now assuming they all have wallets and connected to ethereum.

Now I would write a simple token contract, a DAO, deploy it on the blockchain. Now the DAO will mint 5 tokens, send it to all the 500 customers.

  1. Now all the 500 customers will have 5 xyztokens issued by the contract(or dao) which will be in the contract.
  2. User can use the DAO address to check balance and also make a 5xyztoken to ether conversion and make the DAO transfer ethers to their wallet

Makes sense?

@alexvandesande
Alex Van de Sande
@alexvandesande
Yes, it makes sense.
Only thing would require more thought would be exactly how the dao prices the tokens, how it funds itself and how it protects itself from currency fluctuation. But that’s more business than programming