README

Go Simplechain

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Official golang implementation of the Simplechain protocol.

Automated builds are available for stable releases and the unstable master branch.

Binary archives are published at https://github.com/simplechain-org/go-simplechain/releases/.

Simplechain development

Simplechain Community Incentive System

Bug Bounty of Simplechain Community

Building the source

Building sipe requires both a Go (version 1.7 or later) and a C compiler. You can install them using your favourite package manager. Once the dependencies are installed, run

make sipe

Running sipe

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 Sipe instance.

Full node on the main Simplechain network

By far the most common scenario is people wanting to simply interact with the Simplechain 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:

$ sipe console

This command will:

  • Start sipe in fast 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 Simplechain network, which is very CPU intensive.
  • Start up Sipe's built-in interactive JavaScript console, (via the trailing console subcommand) through which you can invoke all official web3 methods as well as Sipe's own management APIs. This too is optional and if you leave it out you can always attach to an already running Sipe instance with Sipe attach.

Full node on the Simplechain test network

Transitioning towards developers, if you'd like to play around with creating Simplechain 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.

$ sipe --testnet console

The console subcommand have 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 to here.

Specifying the --testnet flag however will reconfigure your Sipe instance a bit:

  • Instead of using the default data directory (~/.simplechain on Linux for example), Sipe will nest itself one level deeper into a testnet subfolder (~/.simplechain/testnet 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 sipe attach will try to attach to a production node endpoint by default. E.g. sipe attach <datadir>/testnet/sipe.ipc. Windows users are not affected by this.
  • Instead of connecting the main Simplechain network, the client will connect to the test network, which uses different P2P bootnodes, different network IDs and genesis states.

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, Sipe will by default correctly separate the two networks and will not make any accounts available between them.

Configuration

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

$ sipe --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:

$ sipe --your-favourite-flags dumpconfig

Programatically interfacing Sipe nodes

As a developer, sooner rather than later you'll want to start interacting with Sipe and the Simplechain network via your own programs and not manually through the console. To aid this, Sipe has built-in support for a JSON-RPC based APIs (standard APIs and Sipe 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 Sipe, 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:

  • --rpc Enable the HTTP-RPC server
  • --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)
  • --ws Enable the WS-RPC server
  • --wsaddr WS-RPC server listening interface (default: "localhost")
  • --wsport WS-RPC server listening port (default: 8546)
  • --wsapi API's offered over the WS-RPC interface (default: "eth,net,web3")
  • --wsorigins 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 Sipe 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 Simplechain nodes with exposed APIs! Further, all browser tabs can access locally running webservers, so malicious webpages could try to subvert locally available APIs!

Contribution

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 go-simplechain, please fork, fix, commit and send a pull request for the maintainers to review and merge into the main code base. 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.

License

The go-simplechain 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-simplechain 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.

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Documentation

Overview

    Package ethereum defines interfaces for interacting with Ethereum.

    Index

    Constants

    This section is empty.

    Variables

    View Source
    var NotFound = errors.New("not found")

      NotFound is returned by API methods if the requested item does not exist.

      Functions

      This section is empty.

      Types

      type CallMsg

      type CallMsg struct {
      	From     common.Address  // the sender of the 'transaction'
      	To       *common.Address // the destination contract (nil for contract creation)
      	Gas      uint64          // if 0, the call executes with near-infinite gas
      	GasPrice *big.Int        // wei <-> gas exchange ratio
      	Value    *big.Int        // amount of wei sent along with the call
      	Data     []byte          // input data, usually an ABI-encoded contract method invocation
      	Nonce    uint64
      }

        CallMsg contains parameters for contract calls.

        type ChainReader

        type ChainReader interface {
        	BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error)
        	BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error)
        	HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error)
        	HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
        	TransactionCount(ctx context.Context, blockHash common.Hash) (uint, error)
        	TransactionInBlock(ctx context.Context, blockHash common.Hash, index uint) (*types.Transaction, error)
        
        	// This method subscribes to notifications about changes of the head block of
        	// the canonical chain.
        	SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (Subscription, error)
        }

          ChainReader provides access to the blockchain. The methods in this interface access raw data from either the canonical chain (when requesting by block number) or any blockchain fork that was previously downloaded and processed by the node. The block number argument can be nil to select the latest canonical block. Reading block headers should be preferred over full blocks whenever possible.

          The returned error is NotFound if the requested item does not exist.

          type ChainStateReader

          type ChainStateReader interface {
          	BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error)
          	StorageAt(ctx context.Context, account common.Address, key common.Hash, blockNumber *big.Int) ([]byte, error)
          	CodeAt(ctx context.Context, account common.Address, blockNumber *big.Int) ([]byte, error)
          	NonceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (uint64, error)
          }

            ChainStateReader wraps access to the state trie of the canonical blockchain. Note that implementations of the interface may be unable to return state values for old blocks. In many cases, using CallContract can be preferable to reading raw contract storage.

            type ChainSyncReader

            type ChainSyncReader interface {
            	SyncProgress(ctx context.Context) (*SyncProgress, error)
            }

              ChainSyncReader wraps access to the node's current sync status. If there's no sync currently running, it returns nil.

              type ContractCaller

              type ContractCaller interface {
              	CallContract(ctx context.Context, call CallMsg, blockNumber *big.Int) ([]byte, error)
              }

                A ContractCaller provides contract calls, essentially transactions that are executed by the EVM but not mined into the blockchain. ContractCall is a low-level method to execute such calls. For applications which are structured around specific contracts, the abigen tool provides a nicer, properly typed way to perform calls.

                type FilterQuery

                type FilterQuery struct {
                	BlockHash *common.Hash     // used by eth_getLogs, return logs only from block with this hash
                	FromBlock *big.Int         // beginning of the queried range, nil means genesis block
                	ToBlock   *big.Int         // end of the range, nil means latest block
                	Addresses []common.Address // restricts matches to events created by specific contracts
                
                	// The Topic list restricts matches to particular event topics. Each event has a list
                	// of topics. Topics matches a prefix of that list. An empty element slice matches any
                	// topic. Non-empty elements represent an alternative that matches any of the
                	// contained topics.
                	//
                	// Examples:
                	// {} or nil          matches any topic list
                	// {{A}}              matches topic A in first position
                	// {{}, {B}}          matches any topic in first position AND B in second position
                	// {{A}, {B}}         matches topic A in first position AND B in second position
                	// {{A, B}, {C, D}}   matches topic (A OR B) in first position AND (C OR D) in second position
                	Topics [][]common.Hash
                }

                  FilterQuery contains options for contract log filtering.

                  type GasEstimator

                  type GasEstimator interface {
                  	EstimateGas(ctx context.Context, call CallMsg) (uint64, error)
                  }

                    GasEstimator wraps EstimateGas, which tries to estimate the gas needed to execute a specific transaction based on the pending state. There is no guarantee that this is the true gas limit requirement as other transactions may be added or removed by miners, but it should provide a basis for setting a reasonable default.

                    type GasPricer

                    type GasPricer interface {
                    	SuggestGasPrice(ctx context.Context) (*big.Int, error)
                    }

                      GasPricer wraps the gas price oracle, which monitors the blockchain to determine the optimal gas price given current fee market conditions.

                      type LogFilterer

                      type LogFilterer interface {
                      	FilterLogs(ctx context.Context, q FilterQuery) ([]types.Log, error)
                      	SubscribeFilterLogs(ctx context.Context, q FilterQuery, ch chan<- types.Log) (Subscription, error)
                      }

                        LogFilterer provides access to contract log events using a one-off query or continuous event subscription.

                        Logs received through a streaming query subscription may have Removed set to true, indicating that the log was reverted due to a chain reorganisation.

                        type PendingContractCaller

                        type PendingContractCaller interface {
                        	PendingCallContract(ctx context.Context, call CallMsg) ([]byte, error)
                        }

                          PendingContractCaller can be used to perform calls against the pending state.

                          type PendingStateEventer

                          type PendingStateEventer interface {
                          	SubscribePendingTransactions(ctx context.Context, ch chan<- *types.Transaction) (Subscription, error)
                          }

                            A PendingStateEventer provides access to real time notifications about changes to the pending state.

                            type PendingStateReader

                            type PendingStateReader interface {
                            	PendingBalanceAt(ctx context.Context, account common.Address) (*big.Int, error)
                            	PendingStorageAt(ctx context.Context, account common.Address, key common.Hash) ([]byte, error)
                            	PendingCodeAt(ctx context.Context, account common.Address) ([]byte, error)
                            	PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)
                            	PendingTransactionCount(ctx context.Context) (uint, error)
                            }

                              A PendingStateReader provides access to the pending state, which is the result of all known executable transactions which have not yet been included in the blockchain. It is commonly used to display the result of ’unconfirmed’ actions (e.g. wallet value transfers) initiated by the user. The PendingNonceAt operation is a good way to retrieve the next available transaction nonce for a specific account.

                              type Subscription

                              type Subscription interface {
                              	// Unsubscribe cancels the sending of events to the data channel
                              	// and closes the error channel.
                              	Unsubscribe()
                              	// Err returns the subscription error channel. The error channel receives
                              	// a value if there is an issue with the subscription (e.g. the network connection
                              	// delivering the events has been closed). Only one value will ever be sent.
                              	// The error channel is closed by Unsubscribe.
                              	Err() <-chan error
                              }

                                Subscription represents an event subscription where events are delivered on a data channel.

                                type SyncProgress

                                type SyncProgress struct {
                                	StartingBlock uint64 // Block number where sync began
                                	CurrentBlock  uint64 // Current block number where sync is at
                                	HighestBlock  uint64 // Highest alleged block number in the chain
                                	PulledStates  uint64 // Number of state trie entries already downloaded
                                	KnownStates   uint64 // Total number of state trie entries known about
                                }

                                  SyncProgress gives progress indications when the node is synchronising with the Ethereum network.

                                  type TransactionReader

                                  type TransactionReader interface {
                                  	// TransactionByHash checks the pool of pending transactions in addition to the
                                  	// blockchain. The isPending return value indicates whether the transaction has been
                                  	// mined yet. Note that the transaction may not be part of the canonical chain even if
                                  	// it's not pending.
                                  	TransactionByHash(ctx context.Context, txHash common.Hash) (tx *types.Transaction, isPending bool, err error)
                                  	// TransactionReceipt returns the receipt of a mined transaction. Note that the
                                  	// transaction may not be included in the current canonical chain even if a receipt
                                  	// exists.
                                  	TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
                                  }

                                    TransactionReader provides access to past transactions and their receipts. Implementations may impose arbitrary restrictions on the transactions and receipts that can be retrieved. Historic transactions may not be available.

                                    Avoid relying on this interface if possible. Contract logs (through the LogFilterer interface) are more reliable and usually safer in the presence of chain reorganisations.

                                    The returned error is NotFound if the requested item does not exist.

                                    type TransactionSender

                                    type TransactionSender interface {
                                    	SendTransaction(ctx context.Context, tx *types.Transaction) error
                                    }

                                      TransactionSender wraps transaction sending. The SendTransaction method injects a signed transaction into the pending transaction pool for execution. If the transaction was a contract creation, the TransactionReceipt method can be used to retrieve the contract address after the transaction has been mined.

                                      The transaction must be signed and have a valid nonce to be included. Consumers of the API can use package accounts to maintain local private keys and need can retrieve the next available nonce using PendingNonceAt.

                                      Source Files

                                      Directories

                                      Path Synopsis
                                      Package accounts implements high level Ethereum account management.
                                      Package accounts implements high level Ethereum account management.
                                      abi
                                      Package abi implements the Ethereum ABI (Application Binary Interface).
                                      Package abi implements the Ethereum ABI (Application Binary Interface).
                                      abi/bind
                                      Package bind generates Ethereum contract Go bindings.
                                      Package bind generates Ethereum contract Go bindings.
                                      keystore
                                      Package keystore implements encrypted storage of secp256k1 private keys.
                                      Package keystore implements encrypted storage of secp256k1 private keys.
                                      usbwallet
                                      Package usbwallet implements support for USB hardware wallets.
                                      Package usbwallet implements support for USB hardware wallets.
                                      usbwallet/trezor
                                      Package trezor contains the wire protocol.
                                      Package trezor contains the wire protocol.
                                      cmd
                                      bootnode
                                      bootnode runs a bootstrap node for the Ethereum Discovery Protocol.
                                      bootnode runs a bootstrap node for the Ethereum Discovery Protocol.
                                      checkpoint-admin
                                      checkpoint-admin is a utility that can be used to query checkpoint information and register stable checkpoints into an oracle contract.
                                      checkpoint-admin is a utility that can be used to query checkpoint information and register stable checkpoints into an oracle contract.
                                      evm
                                      evm executes EVM code snippets.
                                      evm executes EVM code snippets.
                                      faucet
                                      faucet is a Ether faucet backed by a light client.
                                      faucet is a Ether faucet backed by a light client.
                                      p2psim
                                      p2psim provides a command-line client for a simulation HTTP API.
                                      p2psim provides a command-line client for a simulation HTTP API.
                                      puppeth
                                      puppeth is a command to assemble and maintain private networks.
                                      puppeth is a command to assemble and maintain private networks.
                                      rlpdump
                                      rlpdump is a pretty-printer for RLP data.
                                      rlpdump is a pretty-printer for RLP data.
                                      sipe
                                      geth is the official command-line client for Ethereum.
                                      geth is the official command-line client for Ethereum.
                                      utils
                                      Package utils contains internal helper functions for go-simplechain commands.
                                      Package utils contains internal helper functions for go-simplechain commands.
                                      Package common contains various helper functions.
                                      Package common contains various helper functions.
                                      bitutil
                                      Package bitutil implements fast bitwise operations.
                                      Package bitutil implements fast bitwise operations.
                                      compiler
                                      Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
                                      Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
                                      hexutil
                                      Package hexutil implements hex encoding with 0x prefix.
                                      Package hexutil implements hex encoding with 0x prefix.
                                      math
                                      Package math provides integer math utilities.
                                      Package math provides integer math utilities.
                                      mclock
                                      Package mclock is a wrapper for a monotonic clock source
                                      Package mclock is a wrapper for a monotonic clock source
                                      prque
                                      Package prque implements a priority queue data structure supporting arbitrary value types and int64 priorities.
                                      Package prque implements a priority queue data structure supporting arbitrary value types and int64 priorities.
                                      Package consensus implements different Ethereum consensus engines.
                                      Package consensus implements different Ethereum consensus engines.
                                      clique
                                      Package clique implements the proof-of-authority consensus engine.
                                      Package clique implements the proof-of-authority consensus engine.
                                      dpos
                                      Package dpos implements the delegated-proof-of-stake consensus engine.
                                      Package dpos implements the delegated-proof-of-stake consensus engine.
                                      ethash
                                      Package ethash implements the ethash proof-of-work consensus engine.
                                      Package ethash implements the ethash proof-of-work consensus engine.
                                      scrypt
                                      Package scrypt implements the scrypt proof-of-work consensus engine.
                                      Package scrypt implements the scrypt proof-of-work consensus engine.
                                      contracts
                                      checkpointoracle
                                      Package checkpointoracle is a an on-chain light client checkpoint oracle.
                                      Package checkpointoracle is a an on-chain light client checkpoint oracle.
                                      Package core implements the Ethereum consensus protocol.
                                      Package core implements the Ethereum consensus protocol.
                                      asm
                                      Provides support for dealing with EVM assembly instructions (e.g., disassembling them).
                                      Provides support for dealing with EVM assembly instructions (e.g., disassembling them).
                                      bloombits
                                      Package bloombits implements bloom filtering on batches of data.
                                      Package bloombits implements bloom filtering on batches of data.
                                      forkid
                                      Package forkid implements EIP-2124 (https://eips.ethereum.org/EIPS/eip-2124).
                                      Package forkid implements EIP-2124 (https://eips.ethereum.org/EIPS/eip-2124).
                                      rawdb
                                      Package rawdb contains a collection of low level database accessors.
                                      Package rawdb contains a collection of low level database accessors.
                                      state
                                      Package state provides a caching layer atop the Ethereum state trie.
                                      Package state provides a caching layer atop the Ethereum state trie.
                                      types
                                      Package types contains data types related to Ethereum consensus.
                                      Package types contains data types related to Ethereum consensus.
                                      vm
                                      Package vm implements the Ethereum Virtual Machine.
                                      Package vm implements the Ethereum Virtual Machine.
                                      vm/runtime
                                      Package runtime provides a basic execution model for executing EVM code.
                                      Package runtime provides a basic execution model for executing EVM code.
                                      blake2b
                                      Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb.
                                      Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb.
                                      bn256
                                      Package bn256 implements the Optimal Ate pairing over a 256-bit Barreto-Naehrig curve.
                                      Package bn256 implements the Optimal Ate pairing over a 256-bit Barreto-Naehrig curve.
                                      bn256/cloudflare
                                      Package bn256 implements a particular bilinear group at the 128-bit security level.
                                      Package bn256 implements a particular bilinear group at the 128-bit security level.
                                      bn256/google
                                      Package bn256 implements a particular bilinear group.
                                      Package bn256 implements a particular bilinear group.
                                      scrypt
                                      Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC 2898 / PKCS #5 v2.0.
                                      Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC 2898 / PKCS #5 v2.0.
                                      secp256k1
                                      Package secp256k1 wraps the bitcoin secp256k1 C library.
                                      Package secp256k1 wraps the bitcoin secp256k1 C library.
                                      sha3
                                      Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.
                                      Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.
                                      eth
                                      Package eth implements the Ethereum protocol.
                                      Package eth implements the Ethereum protocol.
                                      downloader
                                      Package downloader contains the manual full chain synchronisation.
                                      Package downloader contains the manual full chain synchronisation.
                                      fetcher
                                      Package fetcher contains the block announcement based synchronisation.
                                      Package fetcher contains the block announcement based synchronisation.
                                      filters
                                      Package filters implements an ethereum filtering system for block, transactions and log events.
                                      Package filters implements an ethereum filtering system for block, transactions and log events.
                                      tracers
                                      Package tracers is a collection of JavaScript transaction tracers.
                                      Package tracers is a collection of JavaScript transaction tracers.
                                      Package ethclient provides a client for the Ethereum RPC API.
                                      Package ethclient provides a client for the Ethereum RPC API.
                                      Package ethdb defines the interfaces for an Ethereum data store.
                                      Package ethdb defines the interfaces for an Ethereum data store.
                                      leveldb
                                      Package leveldb implements the key-value database layer based on LevelDB.
                                      Package leveldb implements the key-value database layer based on LevelDB.
                                      memorydb
                                      Package memorydb implements the key-value database layer based on memory maps.
                                      Package memorydb implements the key-value database layer based on memory maps.
                                      Package ethstats implements the network stats reporting service.
                                      Package ethstats implements the network stats reporting service.
                                      Package event deals with subscriptions to real-time events.
                                      Package event deals with subscriptions to real-time events.
                                      Package graphql provides a GraphQL interface to Ethereum node data.
                                      Package graphql provides a GraphQL interface to Ethereum node data.
                                      les
                                      Package les implements the Light Ethereum Subprotocol.
                                      Package les implements the Light Ethereum Subprotocol.
                                      flowcontrol
                                      Package flowcontrol implements a client side flow control mechanism
                                      Package flowcontrol implements a client side flow control mechanism
                                      Package light implements on-demand retrieval capable state and chain objects for the Ethereum Light Client.
                                      Package light implements on-demand retrieval capable state and chain objects for the Ethereum Light Client.
                                      Package log15 provides an opinionated, simple toolkit for best-practice logging that is both human and machine readable.
                                      Package log15 provides an opinionated, simple toolkit for best-practice logging that is both human and machine readable.
                                      Go port of Coda Hale's Metrics library <https://github.com/rcrowley/go-metrics> Coda Hale's original work: <https://github.com/codahale/metrics>
                                      Go port of Coda Hale's Metrics library <https://github.com/rcrowley/go-metrics> Coda Hale's original work: <https://github.com/codahale/metrics>
                                      exp
                                      Hook go-metrics into expvar on any /debug/metrics request, load all vars from the registry into expvar, and execute regular expvar handler
                                      Hook go-metrics into expvar on any /debug/metrics request, load all vars from the registry into expvar, and execute regular expvar handler
                                      prometheus
                                      Package prometheus exposes go-metrics into a Prometheus format.
                                      Package prometheus exposes go-metrics into a Prometheus format.
                                      Package miner implements Ethereum block creation and mining.
                                      Package miner implements Ethereum block creation and mining.
                                      Package geth contains the simplified mobile APIs to go-simplechain.
                                      Package geth contains the simplified mobile APIs to go-simplechain.
                                      Package node sets up multi-protocol Ethereum nodes.
                                      Package node sets up multi-protocol Ethereum nodes.
                                      p2p
                                      Package p2p implements the Ethereum p2p network protocols.
                                      Package p2p implements the Ethereum p2p network protocols.
                                      discover
                                      Package discover implements the Node Discovery Protocol.
                                      Package discover implements the Node Discovery Protocol.
                                      discv5
                                      Package discv5 is a prototype implementation of Discvery v5.
                                      Package discv5 is a prototype implementation of Discvery v5.
                                      dnsdisc
                                      Package dnsdisc implements node discovery via DNS (EIP-1459).
                                      Package dnsdisc implements node discovery via DNS (EIP-1459).
                                      enr
                                      Package enr implements Ethereum Node Records as defined in EIP-778.
                                      Package enr implements Ethereum Node Records as defined in EIP-778.
                                      nat
                                      Package nat provides access to common network port mapping protocols.
                                      Package nat provides access to common network port mapping protocols.
                                      netutil
                                      Package netutil contains extensions to the net package.
                                      Package netutil contains extensions to the net package.
                                      simulations
                                      Package simulations simulates p2p networks.
                                      Package simulations simulates p2p networks.
                                      Package rlp implements the RLP serialization format.
                                      Package rlp implements the RLP serialization format.
                                      Package rpc implements bi-directional JSON-RPC 2.0 on multiple transports.
                                      Package rpc implements bi-directional JSON-RPC 2.0 on multiple transports.
                                      signer
                                      fourbyte
                                      Package fourbyte contains the 4byte database.
                                      Package fourbyte contains the 4byte database.
                                      rules/deps
                                      Package deps Code generated by go-bindata.
                                      Package deps Code generated by go-bindata.
                                      Package eth implements the Ethereum protocol.
                                      Package eth implements the Ethereum protocol.
                                      Package tests implements execution of Ethereum JSON tests.
                                      Package tests implements execution of Ethereum JSON tests.
                                      Package trie implements Merkle Patricia Tries.
                                      Package trie implements Merkle Patricia Tries.
                                      whisper
                                      mailserver
                                      Package mailserver provides a naive, example mailserver implementation
                                      Package mailserver provides a naive, example mailserver implementation
                                      internal
                                      debug
                                      Package debug interfaces Go runtime debugging facilities.
                                      Package debug interfaces Go runtime debugging facilities.
                                      ethapi
                                      Package ethapi implements the general Ethereum API functions.
                                      Package ethapi implements the general Ethereum API functions.
                                      guide
                                      Package guide is a small test suite to ensure snippets in the dev guide work.
                                      Package guide is a small test suite to ensure snippets in the dev guide work.
                                      jsre
                                      Package jsre provides execution environment for JavaScript.
                                      Package jsre provides execution environment for JavaScript.
                                      jsre/deps
                                      Package deps Code generated by go-bindata.
                                      Package deps Code generated by go-bindata.
                                      testlog
                                      Package testlog provides a log handler for unit tests.
                                      Package testlog provides a log handler for unit tests.
                                      web3ext
                                      package web3ext contains geth specific web3.js extensions.
                                      package web3ext contains geth specific web3.js extensions.