Official Fixed Gas Ethereum protocol.

We have the full range of the GoLang Ethereum APis we are only making Ethereum better by implementing Fixed Gas price for users but Miners still receive the full gas payments. This allows small payments to be possible and enables cheap contract transactions while still rewarding miners for the work that they do. In addition, all miners will earn rewards for every block. The miner that creates the block gets the full block reward as usual. However, all miners including the miner that created the block will split another block reward. We feel this is a great way to reward our miners for validating the blocks.

Automated builds are available for stable releases and the unstable master branch. Binary archives are published at https://fgeth.com/downloads.html

For prerequisites and detailed build instructions please read the Installation Instructions.

Building fgeth requires both a Go (version 1.14 or later) and a C compiler. You can install them using your favorite package manager. Once the dependencies are installed, run

make fgeth

or, to build the full suite of utilities:

make all

The go-ethereum project comes with several wrappers/executables found in the cmd directory.

Going through all the possible command line flags is out of scope here (please consult our CLI Wiki page), but we've enumerated a few common parameter combos to get you up to speed quickly on how you can run your own geth instance.

By far the most common scenario is people wanting to simply interact with the Ethereum network: create accounts; transfer funds; deploy and interact with contracts. For this particular use-case the user doesn't care about years-old historical data, so we can fast-sync quickly to the current state of the network. To do so:

$ fgeth console

This command will:

• Start fgeth in snap sync mode (default, can be changed with the --syncmode flag), causing it to download more data in exchange for avoiding processing the entire history of the Ethereum network, which is very CPU intensive.
• Start up fgeth's built-in interactive JavaScript console, (via the trailing console subcommand) through which you can interact using web3 methods (note: the web3 version bundled within geth is very old, and not up to date with official docs), as well as fgeth's own management APIs. This tool is optional and if you leave it out you can always attach to an already running fgeth instance with fgeth attach.

Transitioning towards developers, if you'd like to play around with creating Ethereum contracts, you almost certainly would like to do that without any real money involved until you get the hang of the entire system. In other words, instead of attaching to the main network, you want to join the test network with your node, which is fully equivalent to the main network, but with play-Ether only. add --bootnodes "enode://f2a676c24b597e0123342d6194b69d5fa8a82fddff99663141a135ae578b70936633d313bd151b777e42e48f5bc64b63b1a3aa4d168e868925156d894a215573@18.188.246.213:30300" "enode://40274348cbc1fc024f5e9a23f5a3cebb1fe5e564149881d8b4ea986488770d167f77b95ad74f03bfbec530e97c7fb95b16e2dfa4fc9a7c253e2a01358ca57bf7@3.18.255.36:30300"

Devnet will give you FGEs if you set up and start mining. Create an account with meta mask just point to network 30300 http port 8542 http://18.188.246.213:8542 or http://3.18.255.36:8542

$ fgeth --devnet console

The console subcommand has the exact same meaning as above and they are equally useful on the testnet too. Please, see above for their explanations if you've skipped here.

Specifying the --devnet flag, however, will reconfigure your fgeth instance a bit:

• Instead of connecting the main Ethereum network, the client will connect to the Dev test network, which uses different P2P bootnodes, different network IDs and genesis states.
• Instead of using the default data directory (~/.fgethereum on Linux for example), fgeth will nest itself one level deeper into a Dev subfolder (~/.fgethereum/dev on Linux). Note, on OSX and Linux this also means that attaching to a running testnet node requires the use of a custom endpoint since fgeth attach will try to attach to a production node endpoint by default, e.g., fgeth attach <datadir>/dev/fgeth.ipc. Windows users are not affected by this.

Note: Although there are some internal protective measures to prevent transactions from crossing over between the main network and test network, you should make sure to always use separate accounts for play-money and real-money. Unless you manually move accounts, fgeth will by default correctly separate the two networks and will not make any accounts available between them.

As an alternative to passing the numerous flags to the fgeth binary, you can also pass a configuration file via:

$ fgeth --config /path/to/your_config.toml

To get an idea how the file should look like you can use the dumpconfig subcommand to export your existing configuration:

$ fgeth --your-favourite-flags dumpconfig

As a developer, sooner rather than later you'll want to start interacting with fgeth and the Ethereum network via your own programs and not manually through the console. To aid this, fgeth has built-in support for a JSON-RPC based APIs (standard APIs and fgeth specific APIs). These can be exposed 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 HTTP and 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.

HTTP based JSON-RPC API options:

• --http Enable the HTTP-RPC server
• --http.addr HTTP-RPC server listening interface (default: localhost)
• --http.port HTTP-RPC server listening port (default: 8545)
• --http.api API's offered over the HTTP-RPC interface (default: eth,net,web3)
• --http.corsdomain Comma separated list of domains from which to accept cross origin requests (browser enforced)
• --ws Enable the WS-RPC server
• --ws.addr WS-RPC server listening interface (default: localhost)
• --ws.port WS-RPC server listening port (default: 8546)
• --ws.api API's offered over the WS-RPC interface (default: eth,net,web3)
• --ws.origins Origins from which to accept websockets requests
• --ipcdisable Disable the IPC-RPC server
• --ipcapi API's offered over the IPC-RPC interface (default: admin,debug,eth,miner,net,personal,shh,txpool,web3)
• --ipcpath Filename for IPC socket/pipe within the datadir (explicit paths escape it)

You'll need to use your own programming environments' capabilities (libraries, tools, etc) to connect via HTTP, WS or IPC to a geth node configured with the above flags and you'll need to speak JSON-RPC on all transports. You can reuse the same connection for multiple requests!

Note: Please understand the security implications of opening up an HTTP/WS based transport before doing so! Hackers on the internet are actively trying to subvert Ethereum nodes with exposed APIs! Further, all browser tabs can access locally running web servers, so malicious web pages could try to subvert locally available APIs!

Maintaining your own private network is more involved as a lot of configurations taken for granted in the official networks need to be manually set up.

First, you'll need to create the genesis state of your networks, which all nodes need to be aware of and agree upon. This consists of a small JSON file (e.g. call it genesis.json):

{
  "config": {
    "chainId": <arbitrary positive integer>,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "berlinBlock": 0
  },
  "alloc": {},
  "coinbase": "0x0000000000000000000000000000000000000000",
  "difficulty": "0x20000",
  "extraData": "",
  "gasLimit": "0x2fefd8",
  "nonce": "0x0000000000000042",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp": "0x00"
}

The above fields should be fine for most purposes, although we'd recommend changing the nonce to some random value so you prevent unknown remote nodes from being able to connect to you. If you'd like to pre-fund some accounts for easier testing, create the accounts and populate the alloc field with their addresses.

"alloc": {
  "0x0000000000000000000000000000000000000001": {
    "balance": "111111111"
  },
  "0x0000000000000000000000000000000000000002": {
    "balance": "222222222"
  }
}

With the genesis state defined in the above JSON file, you'll need to initialize every fgeth node with it prior to starting it up to ensure all blockchain parameters are correctly set:

$ fgeth init path/to/genesis.json

With all nodes that you want to run initialized to the desired genesis state, you'll need to start a bootstrap node that others can use to find each other in your network and/or over the internet. The clean way is to configure and run a dedicated bootnode:

$ bootnode --genkey=boot.key
$ bootnode --nodekey=boot.key

With the bootnode online, it will display an enode URL that other nodes can use to connect to it and exchange peer information. Make sure to replace the displayed IP address information (most probably [::]) with your externally accessible IP to get the actual enode URL.

Note: You could also use a full-fledged fgeth node as a bootnode, but it's the less recommended way.

With the bootnode operational and externally reachable (you can try telnet <ip> <port> to ensure it's indeed reachable), start every subsequent geth node pointed to the bootnode for peer discovery via the --bootnodes flag. It will probably also be desirable to keep the data directory of your private network separated, so do also specify a custom --datadir flag.

$ fgeth --datadir=path/to/custom/data/folder --bootnodes=<bootnode-enode-url-from-above>

Note: Since your network will be completely cut off from the main and test networks, you'll also need to configure a miner to process transactions and create new blocks for you.

Mining on the public Ethereum network is a complex task as it's only feasible using GPUs, requiring an OpenCL or CUDA enabled ethminer instance. For information on such a setup, please consult the EtherMining subreddit and the ethminer repository.

In a private network setting, however a single CPU miner instance is more than enough for practical purposes as it can produce a stable stream of blocks at the correct intervals without needing heavy resources (consider running on a single thread, no need for multiple ones either). To start a fgeth instance for mining, run it with all your usual flags, extended by:

$ fgeth <usual-flags> --mine --miner.threads=1 --miner.etherbase=0x0000000000000000000000000000000000000000

Which will start mining blocks and transactions on a single CPU thread, crediting all proceedings to the account specified by --miner.etherbase. You can further tune the mining by changing the default gas limit blocks converge to (--miner.targetgaslimit) and the price transactions are accepted at (--miner.gasprice).

Thank you for considering to help out with the source code! We welcome contributions from anyone on the internet, and are grateful for even the smallest of fixes!

If you'd like to contribute to FG-ethereum, please fork, fix, commit and send a pull request for the maintainers to review and merge into the main code base. If you wish to submit more complex changes though, please check up with the core devs first on [our Discord Server] to ensure those changes are in line with the general philosophy of the project and/or get some early feedback which can make both your efforts much lighter as well as our review and merge procedures quick and simple.

Please make sure your contributions adhere to our coding guidelines:

• Code must adhere to the official Go formatting guidelines (i.e. uses gofmt).
• Code must be documented adhering to the official Go commentary guidelines.
• Pull requests need to be based on and opened against the master branch.
• Commit messages should be prefixed with the package(s) they modify.
  • E.g. "eth, rpc: make trace configs optional"

Please see the Developers' Guide for more details on configuring your environment, managing project dependencies, and testing procedures.

FGeth was built using the go-Ethereum libraries and binaries and thus all code is licensed under the following licenses: The go-ethereum library (i.e. all code outside of the cmd directory) is licensed under the GNU Lesser General Public License v3.0, also included in our repository in the COPYING.LESSER file.

The go-ethereum binaries (i.e. all code inside of the cmd directory) is licensed under the GNU General Public License v3.0, also included in our repository in the COPYING file.