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Geth Ethereum/go-ethereum Wiki Github

Geth Ethereum/go-ethereum Wiki Github

Supported Platforms are Linux, Mac Os and Windows. We support two types of installation: binary or scripted install for users.See Install instructions for binary and scripted installs. Developers and community enthusiast are advised to read the Developers' Guide , which contains detailed instructions for manual build from source (on any platform) as well as detailed tips on testing, monitoring, contributing, debugging and submitting pull requests on github. Javascript Console: geth can be launched with an interactive console, that provides a javascript runtime environment exposing a javascript API to interact with your node. Javascript Console API includes the web3 javascript app API as well as an additional admin API. JSON-RPC server: geth can be launched with a json-rpc server that exposes the JSON-RPC API Command line options documents command line parameters as well as subcommands. Note buying and selling ether through exchanges is not discussed here. The Ethereum Core Protocol licensed under the GNU Lesser General Public License . All frontend client software (under cmd ) is licensed under the GNU General Public License . If something went wrong first read our Troubleshooting checklist as well as the FAQ . If you still didn't find your answer please open an issue on GitHub or contact our help desk on [email protected] . Security issues are best sent to [email protected] or shared in PM with devs on one of the channels (see Community and Suppport). Non-sensitive bug reports are welcome on github. Please always state the version (on master) or commit of your build (if on develop), give as much detail as possible about the situation and the anomaly that occurred. Provide logs or stacktrace if you can. Ethereum is joint work of ETHDEV and the community. #ether Continue reading >>

Installation Instructions For Windows

Installation Instructions For Windows

Compiling geth with tools from chocolatey The Chocolatey package manager provides an easy way to getthe required build tools installed. If you don't have chocolatey yet,follow the instructions on to install it first. Then open an Administrator command prompt and install the build toolswe need: C:\Windows\system32> choco install gitC:\Windows\system32> choco install golangC:\Windows\system32> choco install mingw Installing these packages will set up the Path environment variable.Open a new command prompt to get the new Path. The following steps don'tneed Administrator privileges. Please ensure that the installed Go version is 1.7 (or any later version). First we'll create and set up a Go workspace directory layout,then clone the source. OBS If, during the commands below, you get the following message: WARNING: The data being saved is truncated to 1024 characters. Then that means that the setx command will fail, and proceeding will truncate the Path/GOPATH. If this happens, it's better to abort, and try to make some more room in Path before trying again. C:\Users\xxx> set "GOPATH=%USERPROFILE%"C:\Users\xxx> set "Path=%USERPROFILE%\bin;%Path%"C:\Users\xxx> setx GOPATH "%GOPATH%"C:\Users\xxx> setx Path "%Path%"C:\Users\xxx> mkdir src\github.com\ethereumC:\Users\xxx> git clone src\github.com\ethereum\go-ethereumC:\Users\xxx> cd src\github.com\ethereum\go-ethereumC:\Users\xxx> go get -u -v golang.org/x/net/context C:\Users\xxx\src\github.com\ethereum\go-ethereum> go install -v ./cmd/... Continue reading >>

Developers' Guide Ethereum/go-ethereum Wiki Github

Developers' Guide Ethereum/go-ethereum Wiki Github

We assume that you have go v1.8 installed , and GOPATH is set. Note:You must have your working copy under $GOPATH/src/github.com/ethereum/go-ethereum. Since go does not use relative path for import, working in any other directory will have no effect, since the import paths will be appended to $GOPATH/src, and if the lib does not exist, the version at master HEAD will be downloaded. Most likely you will be working from your fork of go-ethereum, let's say from github.com/nirname/go-ethereum. Clone or move your fork into the right place: git clone [email protected]:nirname/go-ethereum.git $GOPATH/src/github.com/ethereum/go-ethereum All other dependencies are tracked in the vendor/ directory. We use govendor to manage them. If you want to add a new dependency, run govendor fetch , then commit the result. If you want to update all dependencies to their latest upstream version, run govendor fetch +v. You can also use govendor to run certain commands on all go-ethereum packages, excluding vendoredcode. Example: to recreate all generated code, run govendor generate +l. Switch to the go-ethereum repository root directory. You can build all code using the go tool, placing the resulting binary in $GOPATH/bin. go-ethereum exectuables can be built individually. To build just geth, use: Read about cross compilation of go-ethereum here . To make life easier try git flow it sets this all up and streamlines your work flow. Using options -cpu (number of cores allowed) and -v (logging even if no error) is recommended. Note: here all tests with prefix TestMethod will be run, so if you got TestMethod, TestMethod1, then both! See integration testing information on the Testing wiki page geth can do node behaviour monitoring, aggregation and show performance metric charts.Read about Continue reading >>

Github - Ethereum/go-ethereum: Official Go Implementation Of The Ethereum Protocol

Github - Ethereum/go-ethereum: Official Go Implementation Of The Ethereum Protocol

Note: This works only with geth v1.6.0 and above. One of the quickest ways to get Ethereum up and running on your machine is by using Docker: docker run -d --name ethereum-node -v /Users/alice/ethereum:/root \ -p 8545:8545 -p 30303:30303 \ ethereum/client-go --fast --cache=512 This will start geth in fast sync mode with a DB memory allowance of 512MB just as the above command does. It will also create a persistent volume in your home directory for saving your blockchain as well as map the default ports. There is also an alpine tag available for a slim version of the image. Do not forget --rpcaddr 0.0.0.0, if you want to access RPC from other containers and/or hosts. By default, geth binds to the local interface and RPC endpoints is not accessible from the outside. As a developer, sooner rather than later you'll want to start interacting with Geth and the Ethereumnetwork via your own programs and not manually through the console. To aid this, Geth has built insupport for a JSON-RPC based APIs ( standard APIs and Geth specific APIs ). These can beexposed via HTTP, WebSockets and IPC (unix sockets on unix based platforms, and named pipes on Windows). The IPC interface is enabled by default and exposes all the APIs supported by Geth, whereas the HTTPand WS interfaces need to manually be enabled and only expose a subset of APIs due to security reasons.These can be turned on/off and configured as you'd expect. --rpcaddr HTTP-RPC server listening interface (default: "localhost") --rpcport HTTP-RPC server listening port (default: 8545) --rpcapi API's offered over the HTTP-RPC interface (default: "eth,net,web3") --rpccorsdomain Comma separated list of domains from which to accept cross origin requests (browser enforced) --wsaddr WS-RPC server listening interface (default: "loca Continue reading >>

Ethereum - Wikipedia

Ethereum - Wikipedia

This article has multiple issues. Please help improve it or discuss these issues on the talk page . This article relies too much on references to primary sources . Please improve this by adding secondary or tertiary sources . Some of this article's listed sources may not be reliable . Please help this article by looking for better, more reliable sources. Unreliable citations may be challenged or deleted. The Ethereum Project's logo, first used in 2014 Ethereum is an open-source , public, blockchain -based distributed computing platform featuring smart contract (scripting) functionality. [2] It provides a decentralized Turing-complete virtual machine , the Ethereum Virtual Machine (EVM), which can execute scripts using an international network of public nodes. Ethereum also provides a cryptocurrency token called "ether", which can be transferred between accounts and used to compensate participant nodes for computations performed. [3] "Gas", an internal transaction pricing mechanism, is used to mitigate spam and allocate resources on the network. [2] [4] Ethereum was proposed in late 2013 by Vitalik Buterin , a cryptocurrency researcher and programmer. Development was funded by an online crowdsale between July and August 2014. [5] The system went live on 30 July 2015, with 11.9 million coins "premined" for the crowdsale. [6] This accounts for approximately 13 percent of the total circulating supply. In 2016, as a result of the collapse of The DAO project, Ethereum was forked into two separate blockchains - the new forked version became Ethereum (ETH), and the original continued as Ethereum Classic (ETC). [7] [8] [9] Ethereum was initially described in a white paper by Vitalik Buterin , [10] a programmer involved with Bitcoin Magazine , in late 2013 with a goal of buildin Continue reading >>

How To Build A Private Ethereum Blockchain

How To Build A Private Ethereum Blockchain

Step 5: Create an account to use as the coinbase for your blockchain node An Ethereum account is the public key that stores ether that will be used in your private blockchain to pay for gas fees. Before we start the blockchain, we need to create an account that the mining rewards will be deposited too. You will be prompted to set a password for the account, DONT FORGET YOUR PASSWORD, you will not be able to recover it later and wont be able to spend the ether you mine or unlock that account. After entering the password twice, you should expect to get a response back like this: Address: {941f1f0b08757457be0b52d83a1e3e566473ed61} This is the public key of the Ethereum account. Ethereum convention is to prefix accounts with 0x so the account is sometimes seen as 0x941f1fobo8757457be0b52d83a1e3e566473ed61. Step 6: Create JSON File for Genesis Block to Bootstrap Private Blockchain Using a text editor, create a file CustomGenesis.json with the following contents: Step 7: Initialize the blockchain from your CustomGenesis.json file go-ethereum/build/bin/geth init ./CustomGenesis.json You should expect to see output similar to this: INFO[0223|20:20:03] Allotted 128MB cache and 1024 file handles to /home/ubuntu/.ethereum/geth/chaindata INFO[0223|20:20:04] closed db:/home/ubuntu/.ethereum/geth/chaindata INFO[0223|20:20:04] Allotted 128MB cache and 1024 file handles to /home/ubuntu/.ethereum/geth/chaindata INFO[0223|20:20:04] successfully wrote genesis block and/or chain rule set: 5dd3be94dcbf5216aaa3e82700fb51a831257df5d45d984941a0a32ee0f960d8 Congratulations! You have initialized a private Ethereum blockchain!! Before we move on, lets take a break for some optional exploration of the files we have generated. In your home directory you will now see a hidden directory called.ether Continue reading >>

Ethereum Resources

Ethereum Resources

These resources will help you understand Ethereum and get you started building your own Ethereum DApp. If you are new to Ethereum, we recommend you start with Matt Thomas video series. He does an excellent job of explaining core blockchain concepts and walks you through creating your own private blockchain with Geth and Web3. Part 7: How to set up your own private Ethereum Blockchain browser Not a video person? An equally excellent starting point for learning Ethereum is the very thorough blog post by Matt Condon (Thanks to Ryan Tate for the resource!). Matt explains the key Ethereum terms and helps clear up some questions you might have like what is the difference between a wallet and an account? Coming from the web developer side? Mahesh Murthy (we know a non Matt!) gives a simple high-level overview of what it takes to develop a DApp. We wrote our own tutorial ! To be more accurate we combined a couple tutorials we loved (Thanks to Mahesh Murthy and Matt Thomas) into one simple walkthrough. You will learn how to create your own private blockchain network using Geth and Web3 and deploy a simple voting app. Want to build the same app using Truffle ? Mahesh takes our voting app a step further and even shows you how to deploy your DApp on the public Ethereum blockchain. A nice tutorial by Ed Zynda on creating your own token on Ethereum: Continue reading >>

Cannot Find Package

Cannot Find Package "github.com/ethereum/go-ethereum/ethereum"

I was following this youtube video in order to install Ethereum client on Ubuntu 15.10 First I installed Go language environment. Then I have build QT following this wiki After that I tried to download and install Ethereum CLI client with go get -u github.com/ethereum/go-ethereum/ethereum github.com/ethereum/go-ethereum (download)package github.com/ethereum/go-ethereum/ethereum: cannot find package "github.com/ethereum/go-ethereum/ethereum" in any of: /usr/local/go/src/github.com/ethereum/go-ethereum/ethereum (from $GOROOT) /home/cooldudeabhi/work/src/github.com/ethereum/go-ethereum/ethereum (from $GOPATH) go get -u github.com/ethereum/go-ethereum/ You can also use the official ethereum ubuntu repositories: sudo apt-get install software-properties-commonsudo add-apt-repository -y ppa:ethereum/ethereumsudo add-apt-repository -y ppa:ethereum/ethereum-devsudo apt-get updatesudo apt-get install ethereum After installing, run geth account new to create an account on your node. If everything else does not work try manually cloning and building: sudo apt-get install -y git build-essential libgmp3-dev golang The video you linked to is quite old, almost 2 years ago (2014). According to here are the steps for Ubuntu: sudo apt-get install software-properties-commonsudo add-apt-repository -y ppa:ethereum/ethereumsudo add-apt-repository -y ppa:ethereum/ethereum-dev (skip this if you only want the last stable version)sudo apt-get updatesudo apt-get install ethereum Can you post instructions for Linux? I was just following the video so I can get idea for my Linux machine Abhimanyu Aryan Jan 27 '16 at 1:28 The question mentiones Ubuntu 15.10 though, so it is unlikely homebrew would help them. Joris Bontje Jan 27 '16 at 1:29 oops, let me fix... the video was 15mins long so was glancing Continue reading >>

Getting Started Withethereum

Getting Started Withethereum

In this tutorial Ill show you step by step how to get started with Ethereum by learning to use the command line to create a smart contract and deploy to your own private blockchain for testing. This will give you a basic understanding before moving onto using more complex development environments. First well download the client tools for running a node on your computer. Official instructions for installing the tool can be found here: I use a mac, so commands for me were quite simple using the brew package manager: We will use another console line tab for outputting the logging output from our testnet. Note: Having another console tab for logging is not necessary, but it will help keep the screen clear of a lot of logging messages from mining and such forth that can clutter the screen. To identify the current command window enter: $ geth --datadir ~/dev/ethereum-demo init ~/dev/ethereum-demo/genesis.json You will now have a private blockchain database setup in the using the custom genesis block. Creating an Account and adding someEther Now that we have created a private blockchain. Next we will create a coinbase account and load it with ether in order to execute transaction. First we create the account and then update the genesis file with an initial balance for that account. Create a file the contains the account password, and then we use this file to create a new account. $ sudo echo "pa55w0rd123" >> ethereum_pwd.txt $ geth --datadir ~/dev/ethereum-demo/ethereum-data --password ~/dev/ethereum-demo/ethereum_pwd.txt account new Address: {5f94e3b516fc5ddc9f808e5fa8a3a1b5e85e34d5} Invent your own password rather than use mine above. The output is the new hash address of the new account. Now edit the genesis file with the new address and allocate a balance, like so: Note: Continue reading >>

Installing Geth Ethereum/go-ethereum Wiki Github

Installing Geth Ethereum/go-ethereum Wiki Github

The simplest way to install go-ethereum on Ubuntu distributions is via the built in launchpad PPAs (Personal Package Archives). We provide a single PPA repository that contains both our stable as well as our develop releases for Ubuntu versions trusty, xenial, zesty and artful. To enable our launchpad repository please run: sudo add-apt-repository -y ppa:ethereum/ethereum After that you can install the stable version of Go Ethereum: sudo apt-get updatesudo apt-get install ethereum sudo apt-get updatesudo apt-get install ethereum-unstable Although we were shipping Chocolatey packages for a time after Frontier, it has fallen out of date due to the constant manual approval process. With our new build infrastructure in place we will attempt to negotiate trusted package status for go-ethereum to be able to reinstate the Chocolatey workflow. Until then please grab a Windows installer from our downloads page. All our stable releases and develop builds are distributed as standalone bundles too. These can be useful for scenarios where you'd like to: a) install a specific version of our code (e.g. for reproducible environments); b) install on machines without internet access (e.g. air gapped computers); or c) simply do not like automatic updates and would rather manually install software. We create the following standalone bundles: 32bit, 64bit, ARMv5, ARMv6, ARMv7 and ARM64 archives (.tar.gz) on Linux 32bit and 64bit archives (.zip) and installers (.exe) on Windows For all archives we provide separate ones containing only Geth, and separate ones containing Geth along with all the developer tools from our repository (abigen, bootnode, disasm, evm, rlpdump). Please see our README for more information about these executables. To download these bundles, please head the Go Ethereum Continue reading >>

Javascript Console Ethereum/go-ethereum Wiki Github

Javascript Console Ethereum/go-ethereum Wiki Github

Ethereum's Javascript console exposes the full web3 JavaScript Dapp API and the admin API . The ethereum CLI executable geth has a JavaScript console (a Read, Evaluate & Print Loop = REPL exposing the JSRE), which can be started with the console or attach subcommand. The console subcommands starts the geth node and then opens the console. The attach subcommand will not start the geth node but instead tries to open the console on a running geth instance. The attach node accepts an endpoint in case the geth node is running with a non default ipc endpoint or you would like to connect over the rpc interface. $ geth attach ipc:/some/custom/path$ geth attach geth attach ws://191.168.1.1:8546 Note that by default the geth node doesn't start the http and weboscket service and not all functionality is provided over these interfaces due to security reasons. These defaults can be overridden when the --rpcapi and --wsapi arguments when the geth node is started, or with admin.startRPC and admin.startWS . $ geth --verbosity 5 console 2>> /tmp/eth.log Otherwise mute your logs, so that it does not pollute your console: Geth has support to load custom JavaScript files into the console through the --preload argument. This can be used to load often used functions, setup web3 contract objects, or ... geth --preload "/my/scripts/folder/utils.js,/my/scripts/folder/contracts.js" console It's also possible to execute files to the JavaScript interpreter. The console and attach subcommand accept the --exec argument which is a javascript statement. This prints the current block number of a running geth instance. Or execute a local script with more complex statements on a remote node over http: $ geth --exec 'loadScript("/tmp/checkbalances.js")' attach geth --jspath "/tmp" --exec 'loadScript("che Continue reading >>

Mining Ethereum/go-ethereum Wiki Github

Mining Ethereum/go-ethereum Wiki Github

Introduction to Ethereum mining (main wiki) At Frontier, the first release of Ethereum, you'll just need a) a GPU and b) an Ethereum client, Geth. CPU mining will be possible but too inefficient to hold any value. At the moment, Geth only includes a CPU miner, and the team is testing a GPU miner branch , but this won't be part of Frontier. The C++ implementation of Ethereum also offers a GPU miner, both as part of Eth (its CLI), AlethZero (its GUI) and EthMiner (the standalone miner). NOTE: Ensure your blockchain is fully synchronised with the main chain before starting to mine, otherwise you will not be mining on the main chain. When you start up your ethereum node with geth it is not mining by default. To start it in mining mode, you use the --mine command line option . The -minerthreads parameter can be used to set the number parallel mining threads (defaulting to the total number of processor cores). You can also start and stop CPU mining at runtime using the console . miner.start takes an optional parameter for the number of miner threads. Note that mining for real ether only makes sense if you are in sync with the network (since you mine on top of the consensus block). Therefore the eth blockchain downloader/synchroniser will delay mining until syncing is complete, and after that mining automatically starts unless you cancel your intention with miner.stop(). In order to earn ether you must have your etherbase (or coinbase) address set. This etherbase defaults to your primary account . If you don't have an etherbase address, then geth --mine will not start up. You can set your etherbase on the command line: geth --etherbase 1 --mine 2>> geth.log // 1 is index: second account by creation order ORgeth --etherbase '0xa4d8e9cae4d04b093aac82e6cd355b6b963fb7ff' --mine 2 Continue reading >>

Build Your First Ethereum Smart Contract With Soliditytutorial

Build Your First Ethereum Smart Contract With Soliditytutorial

Finance & Tech Nerd, Investor, Blockchain & Crypto Enthusiast, Wannabe Polymath, Master of Discipline in Training, Laissez Faire. Talk Is Cheap. Build Your First Ethereum Smart Contract with Solidity Tutorial So you wanna build a smart contract? Perhaps you want to understand how they work, maybe you want to build your own Dapp, maybe you want to launch the very first billion dollar ICO (sarcasm)... Regardless of your intentions, learning how smart contracts work is invaluable. The Ethereum platform possesses enormous potential to create Dapps that could change the way we interact on the web in the decades to come. While Ethereum deploys smart contracts that work much like a standard blockchain transaction, they yield a conditional statement that must be met before a function(s) is executed. Smart contracts can be used for voting, crowdfunding, blind auctions, multi-signature wallets and MUCH more. Bob has his own scrap metal depot business in the United States, Eric is his iron scrap supplier. Eric is based out of China. Bob and Eric have a GREAT business relationship. They trust each other and have been doing business for a long time. Both have booming businesses, and Bob in particular sells out of iron scrap on a routine basis. Bob deploys a contract where once his iron scrap inventory reaches a certain range, he automatically sends an order out to Eric for X lbs of iron scrap at Y ether per ton. Eric agrees to the arrangement and accepts Bobs payment in ether right away. Eric gets to work right away and starts fulfilling Bobs order. Eric can exchange his ether at a local exchange online for Yuan for a tiny fee and itll be processed instantaneously. Whether Eric decides to hold ether or convert to Yuan is his choice, but either way he can now put this capital to wor Continue reading >>

Command Line Options

Command Line Options

$ geth helpNAME: geth - the go-ethereum command line interface Copyright 2013-2017 The go-ethereum AuthorsUSAGE: geth [options] command [command options] [arguments...] VERSION: 1.7.3-stable COMMANDS: account Manage accounts attach Start an interactive JavaScript environment (connect to node) bug opens a window to report a bug on the geth repo console Start an interactive JavaScript environment copydb Create a local chain from a target chaindata folder dump Dump a specific block from storage dumpconfig Show configuration values export Export blockchain into file import Import a blockchain file init Bootstrap and initialize a new genesis block js Execute the specified JavaScript files license Display license information makecache Generate ethash verification cache (for testing) makedag Generate ethash mining DAG (for testing) monitor Monitor and visualize node metrics removedb Remove blockchain and state databases version Print version numbers wallet Manage Ethereum presale wallets help, h Shows a list of commands or help for one command ETHEREUM OPTIONS: --config value TOML configuration file --datadir "/home/karalabe/.ethereum" Data directory for the databases and keystore --keystore Directory for the keystore (default = inside the datadir) --nousb Disables monitoring for and managing USB hardware wallets --networkid value Network identifier (integer, 1=Frontier, 2=Morden (disused), 3=Ropsten, 4=Rinkeby) (default: 1) --testnet Ropsten network: pre-configured proof-of-work test network --rinkeby Rinkeby network: pre-configured proof-of-authority test network --syncmode "fast" Blockchain sync mode ("fast", "full", or "light") --ethstats value Reporting URL of a ethstats service (nodename:[email protected]:port) --identity value Custom node name --lightserv value Maximum perce Continue reading >>

Contract Tutorial Ethereum/go-ethereum Wiki Github

Contract Tutorial Ethereum/go-ethereum Wiki Github

If you have it installed, it should output something like this: If instead the command returns an error, then you need to install it. If you don't have solC installed, we have a online solidity compiler available. But be aware that if the compiler is compromised, your contract is not safe. For this reason, if you want to use the online compiler we encourage you to host your own . Press control+c to exit the console (or type exit) and go back to the command line. Open the terminal and execute these commands: sudo add-apt-repository ppa:ethereum/ethereumsudo apt-get updatesudo apt-get install solcwhich solc Take note of the path given by the last line, you'll need it soon. You need brew in order to install on your mac brew tap ethereum/ethereumbrew install soliditywhich solc Take note of the path given by the last line, you'll need it soon. You need chocolatey in order to install solc. Windows is more complicated than that, you'll need to wait a bit more. If you have the SolC Solidity Compiler installed, you need now reformat by removing spaces so it fits into a string variable (there are some online tools that will do this) : git clone cpp-ethereum/buildcd cpp-ethereum/buildcmake -DJSONRPC=OFF -DMINER=OFF -DETHKEY=OFF -DSERPENT=OFF -DGUI=OFF -DTESTS=OFF -DJSCONSOLE=OFF ..make -j4 make installwhich solc Now go back to the console and type this command to install solC, replacing path/to/solc to the path that you got on the last command you did: If you now have solC installed, then congratulations, you can keep reading. If you don't, then go to our forums or subreddit and berate us on failing to make the process easier. If you have the compiler installed, you need now reformat your contract by removing line-breaks so it fits into a string variable (there are some online to Continue reading >>

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