4

I faced the same sandbox issue where it was not getting started. In my case it turned out that since I was working from behind a proxy, it was getting blocked. Trying to run the contract from an open network solved the problem. You can post issues in ether camp's Slack. The support is great.


4

Don't worry about your address, it is not importent to remember it while you have the private key and the seed. I recommand you to use https://www.myetherwallet.com/ (because it is easy, however you could use any ethereum client to import your account). Under the View Wallet Info option provide (past) you key "whitout the 0X"


3

The example project consists of 3 parts: Solidity contracts in directory contracts/ Web-app in directory web/ Tests for the contracts in directory test/ To run the contracts you need to start a new ethereum sandbox with your contracts deployed there. To do that click on "Run All Contract" button: I think you're using IDE in the minimal mode. If so, you ...


3

In Solidity, this is available as msg.gas, documented here. There's no direct way to obtain the initial gas; the best option is to store msg.gas to a variable as soon in the contract execution as is practical.


3

Mix IDE is officially supported by Ethereum, and can be used with geth. But you could use either of them based on your preference. You could also take a look at some other Javascript IDEs, specially atom. As far as I know, Meteor+web3js is sufficient, and trying to use Truffle or Embark will only make it more confusing.


2

Use Keccak-256 hashing algorithm with your seed. You can install it from npm or use online tools (but don't trust your account after exposing you seed elsewhere online). To avoid problems use shorter seed in the future. I don't know exact limit but expect 50 chars to be fine.


2

Follow that one: https://www.youtube.com/watch?v=DLSyP_pE4gY be sure you are entering the receiver address with no 0x prefix


2

Brain wallets are dangerous. As a blockexplorer, ether.camp is very useful with features such as showing the VM trace: this author adores those features and have posted screenshots of ether.camp on this site. However, it is the opinion of this author that withdrawal and brainwallet features of ether.camp are dangerous and should be avoided. This point ...


2

Since the site dies not appear to accept strings longer than 64 characters, as you said, I would recommend hashing the seed manually using a cryptographic hash, like SHA256. This should return a 64 character hex string that you can then use as the seed. In Linux, for example, you can use the sha256sum command. There should be similar tools for other OS's as ...


2

Make sure that you are running geth version 1.4.18 or later (I don't know about the 1.5x dev version). For Parity, Ethereum Wallet and EthereumJ, see FAQ: Upcoming Ethereum Hard Fork. This hard fork took place on Aug 18 2016, but some miners on the Morden network are running the older version of the clients that don't support the hard fork. And other miners ...


1

With Web3.js, you can get chainblock content by command of eth.getBlock(eth.blockNumber), and access every attribute, currentBlock = eth.getBlock(eth.blockNumber); currentBlock.extraData; currentBlock.transactions; ...


1

Replace the IP with the URL of your cloud9 or Ethereum Studio instance. http://xxx.by.ether.camp:8080/?_c9_id=livepreview0&_c9_host=https://xxx.by.ether.camp Where xxx is your username on ether.camp.


1

I wanted to ask for details, but I can't post comments. It should be contract.removeElement("0x2adc25665018aa1fe0e6bc666dac8fc2697ff9ba") Do you see any error messages in the browser console? When you click on the button do you see the transaction in the transactions dialog of the IDE? The code is built by browserify with gulp, that's why it uses CommonJS ...


1

Open the bash terminal, on your screenshot the most leftish tab below. And build the example project with the following commands: cd ~/workspace/example-project npm install gulp-cli -g npm install gulp After that, to run it: cd ~/workspace/example-project/web npm install http-server -g http-server You will see some output like that: Starting up http-...


1

on: live.ether.camp Ethereum Studio you have a complete Ethereum sandbox where you can imitate transaction execution and have very good estimation of the used gas. More info to start is here: http://blog.ether.camp/post/142794388568/ethereum-studio-is-ready-for-you


1

Here is how to get a useful hash from your seed even if it's too long. You use Keccak-256 hashing algorithm with your seed. The resulting 32byte hash (64 chars [0-9a-f]) is the hash you can use in ether.camp to sign the transactions. Be aware that Keccak-256 is not the same as SHA3. It took some time to figure it out and the info from https://medium.com/@...


1

You can get the private key to output on live.ether.camp by... Generate a new wallet (any wallet) View the wallet Right click and say inspect element Go to console. type ethUtil.sha3(" your_seed_here ").toString('hex') This will output your unencrypted private key. Import that key into Mist and transfer ALL funds to a new wallet ASAP. Here is how to import ...


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