CryptoCoinsInfoClub.com

Ethereum Connect

Connecting To The Network

Connecting To The Network

Geth continuously attempts to connect to other nodes on the networkuntil it has peers. If you have UPnP enabled on your router or runethereum on an Internet-facing server, it will also accept connectionsfrom other nodes. Geth finds peers through something called the discovery protocol. Inthe discovery protocol, nodes are gossipping with each other to findout about other nodes on the network. In order to get going initially,geth uses a set of bootstrap nodes whose endpoints are recorded in thesource code. To change the bootnodes on startup, use the --bootnodes option andseparate the nodes by commas. For example: geth --bootnodes enode://[email protected]:port1,enode://[email protected]:port2,enode://[email protected]:port3 Sometimes you just can't get connected. The most common reasons areas follows: Your local time might be incorrect. An accurate clock is requiredto participate in the Ethereum network. Check your OS for how to resyncyour clock (example sudo ntpdate -s time.nist.gov) because even 12seconds too fast can lead to 0 peers. Some firewall configurations can prevent UDP traffic from flowing.You can use the static nodes feature or admin.addPeer() on the consoleto configure connections by hand. To start geth without the discovery protocol, you can use the --nodiscover parameter. You only want this is you are running a test node or an experimental test network with fixed nodes. To check how many peers the client is connected to in the interactive console, the net module has two attributes give you info about the number of peers and whether you are a listening node. To get more information about the connected peers, such as IP address and port number, supported protocols, use the peers() function of the admin object. admin.peers() returns the list of currently connected peers. > ad Continue reading >>

Create Your Own Marriage Contract

Create Your Own Marriage Contract

New to Ethereum? Try visiting this guide before moving forward. The online Solidity compiler has the ability to connect to running instances of your geth node through RPC and IPC. Below are the flags you need to add when you start geth in order to allow your node to communicate with the website. geth --unlock 0 --rpc --rpcport "8545" --ipcapi "admin,db,eth,debug,miner,net,shh,txpool,personal,web3" --rpcapi "db,eth,net,web3" --rpccorsdomain "console If you'd like to have access to the geth console in a second command prompt window, open another console window and enter geth attach to attach that console window to your geth instance. You may want to make a script so you can easily open your geth console. I accomplished this on my Windows system by creating a file called geth_unlocked.cmd which opens my geth console. Back at the Solidity Compiler website, we want to connect to our geth node over either RPC or IPC. Most people will want to connect over RPC. Click the Cube icon. Change the address and port in the "Web3 provider input" box to match the flags you set to launch geth. If you used the previous step to launch geth your address and port should be A dialog box may pop up warning you if you want to connect. Click "OK". Create Your Contract and Call Your Contract Functions Click the red "Create" button on below your node connection settings. Your transaction will soon be mined (normally within 30 seconds) and your public variables (in blue) and your functions (in red) will appear below. Add information to the function calls to create your marriage on the blockchain. Note that Ethereum doesn't always understand the difference between a string and a hex value, so this online compiler differentiates the two by using quotes. If you want to submit a string, surround that Continue reading >>

How Are Ripple And Bitcoin/ethereum Transactions Connected?

How Are Ripple And Bitcoin/ethereum Transactions Connected?

This article briefly explains the technical background of transactions on the Ripple, Bitcoin and Ethereum networks. It is a bit technical in nature. Each deposit or withdrawal of cryptocurrency (BTC, ETH, ETC, REP, etc.) from and to the Ripple network consists of two transactions: one on the Ripple network, and the other on the native currency blockchain (Ethereum or Bitcoin). Each of the the two transactions has a distinct hash, and different sending and receiving address. (Besides the two transactions that are publicly visible, there are also several steps that need to be completed within GateHub, but we will not get into this here.) A withdrawal from your Ripple wallet to a, say, Bitcoin address goes like this: The funds are first sent from your Ripple wallet to GateHub's issuing address on the Ripple network; The funds are sent from GateHub's Bitcoin hot wallet address to your destination Bitcoin address. A deposit from your desktop, mobile, or 3rd party Bitcoin wallet to your Ripple wallet goes like this: You send the funds to your Bitcoin deposit address; GateHub detects the deposit and sends the corresponding amount from GateHub's Ripple hot wallet walletto your Ripple address. Ethereum (ETH, ETC, REP) deposit and withdrawal processis analogous. Please also note that the deposit address (for cryptocurrencies other than XRP) you get at GateHub isnot "your wallet", i.e. it is not an address you control. Anything sent to your deposit address from a 3rd party service will be credited to your account, but your withdrawals will not come from your deposit address. Also,do not send any Ethereum tokens or other currencies that GateHub Fifth does not support to your deposit address. Such deposits will be ignored. We cannot guarantee such deposits will be returned. Continue reading >>

Etherconnect: An Extension Of Ethereum

Etherconnect: An Extension Of Ethereum

Go to MyEtherWallet and open your wallet. Scroll down and on right-side, you will see "Token Balances" box. Scroll to the bottom and click Watch Token. Enter Token Address, Token Name, Token Symbol, and Decimals. Open Ethereum Wallet and click on the "Contracts" tab. Enter Token Address, Token Symbol, and Decimals. Click "Ok" and your token will be added... And you are done! Navigate to Applications in your wallet and find the Token Registry. (If it's not displayed by default, use the Edit button on top to toggle visibility of displayed DApps.) To register a new token with the Token Registry, we need the token address, decide on a 3-letter acronym (TLA), a token name, and specify the number of decimals. Once done, this will execute the register function of the Token Registry smart contract adding our token to Parity. Once deployed, the token is displayed in the registry among other registered tokens... And you are done! First you need to make sure that your firmware is updated to 1.2. To manage your tokens, go to MyEtherWallet and select the "Send Tokens" tab. Plug your Nano S, select the Ethereum app and go to the settings of the app to activate "Browser support" and "Contract data". This will enable the direct connection to the browser and MyEtherWallet will be able to detect your device (note that if you wish to use the Ledger Ethereum Chrome application, you'll have to disable browser support). Select the base address you wish to manage. You can now receive and send tokens from your Ledger Wallet. Continue reading >>

Deploying To The Live Network | Truffle Suite

Deploying To The Live Network | Truffle Suite

When you're finished developing your contracts and would like others to use them, the next step is to deploy them to the live network. By now you will have been working on a development network like Ganache , and you will have noticed Truffle is set up to support that by default. Deploying to the live network or any other network will require that you first connect one of the many Ethereum clients to your network of choice, as well as configure Truffle correctly. There are many Ethereum clients to choose from. The most popular are go-ethereum and cpp-ethereum . This tutorial cannot go into the details of setting up each client for each operating system, but be sure your desired client is installed and configured to perform the following: Your client is completely synced with the live network Your client is hosting an RPC server on 127.0.0.1 and port 8546 (for this tutorial) Your client has at least one account registered and can sign transactions for that account The registered account contains enough Ether to deploy your contracts If you don't want to set up an Ethereum client yourself, you can alternatively use Infura . This will require you configure Truffle correctly for Infura before proceeding. The default Truffle configuration without any bells and whistles looks like this: module.exports = { rpc: { host: "127.0.0.1", port: 8545 }}; This tells Truffle that by default it should connect to an Ethereum client at host 127.0.0.1 and port 8545. You could keep this configuration and simply stop your development client and run the live network at the same host and port; however, Truffle won't know how to distinguish deployment artifacts on the development network from those same artifacts on the live network (like deployed addresses, for instance). To ensure Truffle kno Continue reading >>

Ethereum: Using The Wallet With A Private Geth Node

Ethereum: Using The Wallet With A Private Geth Node

Ethereum: Deploying to a Private Blockchain This step may be optional depending on your situation. If youve had geth running in a dev environment for a while then its worth checking if a newer version is available. Check your current geth version by opening a terminal and typing: GethVersion: 1.5.9-stableGit Commit: a07539fb88db7231d18db918ed7a6a4e32f97450Protocol Versions: [63 62]Network Id: 1Go Version: go1.7.3OS: linuxGOPATH=GOROOT=/usr/lib/go-1.7 The stable version available at time of writing is 1.6.7. StackExchange has a nice answer on updating Mist on Ubuntu which helped me with the next part: sudo apt-get install software-properties-commonsudo add-apt-repository -y ppa:ethereum/ethereumsudo apt-get update && sudo apt-get upgrade Lastly, validate that geth was updated successfully: You should see output similar to below confirming the version installed as 1.6.7-stable GethVersion: 1.6.7-stableGit Commit: ab5646c532292b51e319f290afccf6a44f874372Architecture: amd64Protocol Versions: [63 62]Network Id: 1Go Version: go1.8.1Operating System: linuxGOPATH=GOROOT=/usr/lib/go-1.8 Next youll need to download the Ethereum Wallet if its not already installed on your machine. wget Wait until the download is complete and youll see something like this: .HTTP request sent, awaiting response... 200 OKLength: 57229019 (55M) [application/octet-stream]Saving to: 'Ethereum-Wallet-linux64-0-9-0.zipEthereum-Wallet-lin 100%[===================>] 54.58M 794KB/s in 2m 12s 2017-08-18 23:12:42 (425 KB/s) - 'Ethereum-Wallet-linux64-0-9-0.zip saved [57229019/57229019] Unzip the downloaded file and cd into the newly created directory: unzip Ethereum-Wallet-linux64-0-9-0.zipcd linux-unpacked The new directory named /linux-unpacked should contain several files, including the ethereumwallet exec Continue reading >>

Beginners Guide To Ethereum (4)connect Ethereum Nodes On Different Machines

Beginners Guide To Ethereum (4)connect Ethereum Nodes On Different Machines

Beginners guide to Ethereum (4) connect Ethereum nodes on different machines This tutorial might require prior knowledge in previous tutorials. You can always refer to the previous series or leave a commet if you find something hard to understand:) Instead of using the localhost on the same machine, we are going to connect two computers to our own router, to see if we can actually connect the nodes between different machines. two computer that you have access to connect it to a different network geth installed (refer to the first tutorial if havent installed) To let two nodes connected on the same chain and same network, you have to have the same genesis file (the first block has to be the same) and same networkid. Since we are not on the same machine, parameters such as datadir and port,where the node is running on, dont have to be different. Before we start Config our routersettings I will assume this is your first time to use a router (because I am too XD). open wifi preferences and connect to a network called dlink Note that here we havent set it with internet connection, so youll be offline once connected to this network. *If you are not going to change your networks name, skip the following and jump to the start coding session. But its always good to have a taste of how to customize this router by going through a simple example. 3. Open the web browser and go to 192.168.0.1 (This brings you to the routers settings page) 4. As specified in the guidebook, the password for login is (leave this field blank) 5. As to keep things simple, we are not going to set up internet connection, go to the wireless setup in the left nav bar and click manual wireless connection setup on the buttom. 6. Find a column called Wireless Network Name and set this value to the name you wan Continue reading >>

Install The Command Line Tools

Install The Command Line Tools

Command line tools for the Ethereum Network These are tools for blockchain developers. The command line tools will allow you to connect your server to or run your application on the Ethereum blockchain or your own private blockchain. For security purposes , three independent implementations were created for Ethereum. The clients have almost identical functionality, so the one you pick is left to personal choice on platform, language and what your planned use is for the network. If you are building a business that needs to have maximum uptime guarantees to the Ethereum network, we recommend that you run at least one instance of both clients to ensure reliability. The Go implementation is called Geth. Geth has been audited for security and will be the future basis for the enduser-facing Mist Browser, so if you have experience with web development and are interested in building frontends for dapps, you should experiment with Geth. Install Homebrew and make sure it's up to date: Then use these commands to install ethereum: brew tap ethereum/ethereumbrew install ethereum For more, see the full documentation on Mac OSX Geth Download the latest stable binary , extract it, download the zip file, extract geth.exe from zip, open a command terminal and type: chdir open geth.exe For more, see the full documentation on Windows Geth sudo apt-get install software-properties-commonsudo add-apt-repository -y ppa:ethereum/ethereumsudo apt-get updatesudo apt-get install ethereum For other environments and more instruction, see the full documentation on Geth The C++ implementation is simply called Eth. If you want added security by running two different implementations in parallel or are serious about GPU mining, then the C++ "Eth" client is for you. Install Homebrew and then make sure it Continue reading >>

Rinkeby: Ethereum Testnet

Rinkeby: Ethereum Testnet

An archive node synchronizes the blockchain by downloading the full chain from the genesis block to the current head block, executing all the transactions contained within. As the node crunches through the transactions, all past historical state is stored on disk, and can be queried for each and every block. Initial processing required to execute all transactions may require non-negligible time and disk capacity required to store all past state may be non-insignificant. High end machines with SSD storage, modern CPUs and 8GB+ RAM are recommended. To run an archive node, download rinkeby.json and start Geth with: geth --datadir=$HOME/.rinkeby init rinkeby.json geth --networkid=4 --datadir=$HOME/.rinkeby --cache=1024 --syncmode=full --ethstats='yournode:Respect my [emailprotected] ' --bootnodes=enode://a24ac7c5484ef4ed0c5eb2d36620ba4e4aa13b8c84684e1b4aab0cebea2ae45cb [emailprotected] 52.169.42.101:30303 You can download Geth from . A full node synchronizes the blockchain by downloading the full chain from the genesis block to the current head block, but does not execute the transactions. Instead, it downloads all the transactions receipts along with the entire recent state. As the node downloads the recent state directly, historical data can only be queried from that block onward. Initial processing required to synchronize is more bandwidth intensive, but is light on the CPU and has significantly reduced disk requirements. Mid range machines with HDD storage, decent CPUs and 4GB+ RAM should be enough. To run a full node, download rinkeby.json and start Geth with: geth --datadir=$HOME/.rinkeby init rinkeby.json geth --networkid=4 --datadir=$HOME/.rinkeby --cache=512 --ethstats='yournode:Respect my [emailprotected] ' --bootnodes=enode://a24ac7c5484ef4ed0c5eb2d36620ba4e4aa1 Continue reading >>

Connecting To Ethereum Node In Web Browser

Connecting To Ethereum Node In Web Browser

CONNECTION ERROR: Couldn't connect to node is it running? I'm currently trying to use a Meteor app with a node on a private test network. I've also tried running it on a real node on the real network as well. I am able to access the web3.eth objects, but I can't seem to connect to my node! It's so frustrating! I've tried the following in launching my nodes, neither of them work (they launch okay, but I cannot connect to them through my browser): geth --networkid 8545 --genesis ~/genesis_block.json --datadir ~/.ethereum_experiment console geth --rpccorsdomain "*" --rpc --networkid 8545 --minerthreads "1" --datadir ~/.ethereum_experiment --mine This is what I use to set the provider in the browser console: web3.setProvider(new web3.providers.HttpProvider("I think I was getting the same error, when was trying to run geth in a VM. And in that case the issue was with RPC listening to localhost only. Binding it to all addresses with --rpcaddr "0.0.0.0" solved the problem: geth --rpc --rpcaddr "0.0.0.0" --rpcport 8545 --nodiscover --networkid "$NETWORKID" --datadir ~/.ethereum_experiment --genesis ~/genesis_block.json Important thing to note here is that with a such configuration the port will be open to connections from the outside world, if it's not on a private network or not protected with a firewall. You can also check if the RPC port is open by trying to connect to it with telnet: I later on found out that it had to do with the fact that I required the RPC port setting. I originally thought networkid was what determined the port, but it's something else entirely. adrianmc Aug 22 '15 at 11:29 Or you can test with geth "geth attach rpc:http : //192.168.100.2:7001" Max Feb 19 '16 at 23:07 @Max how do you run geth attach if a geth rpc node is running simultaneously? Or does Continue reading >>

Status Messenger Connect Your Smartphone To Ethereum

Status Messenger Connect Your Smartphone To Ethereum

Status Messenger Connect your smartphone to Ethereum Ethereums smart contract support and wide adoption has made it a popular proving ground for ambitious decentralised applications. One of the most interesting consumer applications to emerge from this environment is Status, a decentralised messaging platform and mobile interface. The platform aims to communicate directly with the Ethereum blockchain, allowing users to access decentralised applications and transfer cryptocurrency from their smartphone. The Status framework is built on the Ethereum blockchain through the use of smart contracts, and the Status Messenger client interacts with this network. Making Ethereums systems more accessible to the average user is part of the platforms goal and it hopes to achieve this by developing an application with a user-friendly interface. Using the Status mobile app, consumers can send, receive, and store Ethereum, and use decentralised applications (dApps) on their smartphones. The application includes a directory of linked dApps, including services like Ethlance, Gnosis, Oasis Exchange, and Aragon. Users can also purchase Status Network Tokens (SNT) to access more powerful features of the application. SNT tokens are built on the Ethereum blockchain and were generated in Statuss initial coin offering last year. The Status mobile application is currently in alpha and prospective testers can sign up on the Status website. There is not much functionality enabled within the app at the moment, but it does allow users to send and receive Ethereum, and chat with other Status users. The Status app supports group chats and the sending and receiving of files using Swarm a peer-to-peer file sharing system built on Ethereum. Users can also seamlessly access decentralised services such as Continue reading >>

Connecting To The Network

Connecting To The Network

Distribution of client implementations on the current live network - Realtime stats on EtherChain. Public, private, and consortium blockchains Most Ethereum projects today rely on Ethereum as a public blockchain, which grants access to a larger audience of users, network nodes, currency, and markets. However, there are often reasons to prefer a private blockchain or consortium blockchain (among a group of trusted participants). For example, a number of companies in verticals, like banking, are looking to Ethereum as a platform for their own private blockchains. Below is an excerpt from the blog post On Public and Private Blockchains that explains the difference between the three types of blockchains based on permissioning: Public blockchains: a public blockchain is a blockchain that anyone in the world can read, anyone in the world can send transactions to and expect to see them included if they are valid, and anyone in the world can participate in the consensus process the process for determining what blocks get added to the chain and what the current state is. As a substitute for centralized or quasi-centralized trust, public blockchains are secured by cryptoeconomics the combination of economic incentives and cryptographic verification using mechanisms such as proof of work or proof of stake, following a general principle that the degree to which someone can have an influence in the consensus process is proportional to the quantity of economic resources that they can bring to bear. These blockchains are generally considered to be fully decentralized. Consortium blockchains: a consortium blockchain is a blockchain where the consensus process is controlled by a pre-selected set of nodes; for example, one might imagine a consortium of 15 financial institutions, each of Continue reading >>

The Ethereum Chrome Application Doesn't Open

The Ethereum Chrome Application Doesn't Open

The Ethereum Chrome application doesn't open You've already initialised your Ledger device, and maybe already made some transactions. But now, when you connect your Ledger device,launch the Ethereum Wallet Chrome application on your computer, and the application doesn't open, as if your device weren't recognised. First, make sure thatyou don't run any other Chrome extensions, or that you don't run any other Ethereum application like Mist or Geth, and launch the Ledger Wallet Ethereum application on your computer Disable the "browser support"settingin the Ethereum application of your Nano S or your Blue. This setting must be OFF to let your Chrome application recognise your device, and ON when you want to use your device with another application like MyEtherWallet: - open the Ethereum application on the device - disable the "browser support" by taping on it to make the slider displayed in grey If it still doesn't work, you can try to: -uninstall and reinstall your Ethereum Chrome app -uninstall and reinstall your Ethereum app on your Nano S This issue can also be caused by a bad data connexion, even if your Nano S seems to be properly powered. Then you can try to: - try on another computer to see if the connexion issue comes from your computer Continue reading >>

How To Connect To An Ethereum Mining Pool?

How To Connect To An Ethereum Mining Pool?

How to connect to an Ethereum mining pool? Ethereum mining is best done by joining a mining pool so that there is a steady stream of Ether's into your wallet and in this guide we will show you a step by step process to do just this. In our "How to Mine Ethereum on a Windows PC" we showed you how to install all the software to get your computer mining with its graphics card and failing that, with its CPU. However this isn't the whole process, as when you mine on your own the chance of finding a block is incredibly small considering the total amount of hashing power in the network - so the best option is to join a mining pool to smooth the volatility of returns - you can read about the benefits of joining a bitcoin or ethereum mining pool here . Step 1: If you have gone through our guide here on how to set up your computer to mine ethereum you are most of the way there - in fact all you need is an address which you can get from the EthDev wallet - which is basically a nice interface to doing exactly the same process. The reason you need a wallet or address is to tell the pool where to pay your money! You don't need to sync the blockchain - the mining pool provider will do this for you! Step 2: Once you have an address you need to start ethminer - and if you haven't installed this you can do so by following the section. 2.1Now you need to download Ethminer which makes your GPU or CPU run the hashing algorithm that is integral to securing the Ethereum network through proof of work. You can download this here and be sure to scroll down to the bottom of the page to get the right version - the latest and most up to date one is right at the end. 2.2 Click on the download and click install. Your firewall can cause issues but just click allow if it does so - the same is true of Continue reading >>

Deploy To Ethereum Network (from Browser-solidity)

Deploy To Ethereum Network (from Browser-solidity)

0x037c897d77109a0d99186e7456ca7f52f2deae9f Unlike when deploying to local JavaScriptVM, it takes a while for the above state change (state registered in block). If there is no change on the screen all the time in this state, there is a possibility that registration has failed. (When checking with the browser's DevelopmentMode, it often occurs that JavaScript has caused an error.) BrowserSolidity is still under development and depending on the Version the Create operation may fail. In that case, please adjust the version of BrowserSolidity or try to deploy directly from the command line shown in the following section. Set "HelloWorld" in the same way as when running in local JavaScriptVM. Enter "Hello World" and press 'setGreeting'. Wait for the transaction to be issued and enter the block. A transaction is created and the results are displayed. If you press 'getGreeting', the value of the field will be retrieved. Since this process is contant, it does not involve issuing transactions, so the results are displayed immediately. Deployed contracts are instantiated on the BlockChain, so you can specify addresses to retrieve them. Press 'AtAddress' and the address of the contract you created in the dialog 0x037c897d77109a0d99186e7456ca7f52f2deae9f You can load deployed contracts as described below. Continue reading >>

More in ethereum

  • Ethereum Testnet Wallet

    Ledger / TREZOR / Digital Bitbox : Use your hardware wallet . Your device * is * your wallet. MetaMask Connect via your...

    ethereum Apr 8, 2018
  • Cara Kerja Bitcoin

    2 Metode: Menggunakan Bitcoin sebagai Individu Menggunakan Bitcoin sebagai Pedagang Bitcoin adalah mata uang digital pe...

    ethereum May 10, 2018
  • Ethereum Mining Hardware

    Last updated on February 26th, 2018 at 04:04 pm Ethereum (ETH) is a popular choice for graphics card (GPU) miners. In 2...

    ethereum May 9, 2018
  • Ethereum Pos Countdown

    Ethereum's 2017 Roadmap: Flexibility, PoW to PoS, Improving Ecosystem Ethereum has been one of the best performing digi...

    ethereum May 7, 2018
  • Kantor Bitcoin Jakarta

    Share this Facebook Twitter Google+ Pin It Buffer Pada awalnya Bitcoin.co.id hanya memiliki kantor di Seminyak dan Ubud...

    ethereum May 10, 2018
  • Bitcoin Kaufen Ohne Gebühren

    Bitcoin kaufen - unkompliziert und schnell Bereits seit dem Jahr 2012 legt der Bitcoin-Kurs eine rasante Rally hin, dar...

    ethereum May 10, 2018
  • Bitcoin Sharding

    Ethereum Jumps on Rumors of Sharding Testnet Launching Soon Ethereans are full of rumors today regarding a deleted twee...

    ethereum Mar 29, 2018
  • Berlin Bitcoin Atm

    Bitcoin city Berlin; There are some fascinating cities around the world where you can live entirely on bitcoin. And Ber...

    ethereum May 10, 2018
  • Harga Bitcoin Sekarang

    Apa yang Menyebabkan Harga Bitcoin Naik Turun? Sebenarnya harga Bitcoin itu dipengaruhi oleh apa ya? Jika Anda perhatik...

    ethereum May 10, 2018