mirror of https://github.com/ethereum/go-ethereum
Péter Szilágyi
9 years ago
parent
d46da273c6
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// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package eth |
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import ( |
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"math/big" |
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"github.com/ethereum/go-ethereum/accounts/abi/bind" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/core/types" |
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"github.com/ethereum/go-ethereum/rlp" |
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"github.com/ethereum/go-ethereum/rpc" |
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) |
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// ContractBackend implements bind.ContractBackend with direct calls to Ethereum
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// internals to support operating on contracts within subprotocols like eth and
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// swarm.
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//
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// Internally this backend uses the already exposed API endpoints of the Ethereum
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// object. These should be rewritten to internal Go method calls when the Go API
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// is refactored to support a clean library use.
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type ContractBackend struct { |
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eapi *PublicEthereumAPI // Wrapper around the Ethereum object to access metadata
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bcapi *PublicBlockChainAPI // Wrapper around the blockchain to access chain data
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txapi *PublicTransactionPoolAPI // Wrapper around the transaction pool to access transaction data
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} |
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// NewContractBackend creates a new native contract backend using an existing
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// Etheruem object.
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func NewContractBackend(eth *Ethereum) *ContractBackend { |
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return &ContractBackend{ |
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eapi: NewPublicEthereumAPI(eth), |
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bcapi: NewPublicBlockChainAPI(eth.chainConfig, eth.blockchain, eth.miner, eth.chainDb, eth.gpo, eth.eventMux, eth.accountManager), |
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txapi: NewPublicTransactionPoolAPI(eth), |
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} |
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} |
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// ContractCall implements bind.ContractCaller executing an Ethereum contract
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// call with the specified data as the input. The pending flag requests execution
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// against the pending block, not the stable head of the chain.
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func (b *ContractBackend) ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) { |
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// Convert the input args to the API spec
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args := CallArgs{ |
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To: &contract, |
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Data: common.ToHex(data), |
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} |
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block := rpc.LatestBlockNumber |
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if pending { |
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block = rpc.PendingBlockNumber |
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} |
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// Execute the call and convert the output back to Go types
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out, err := b.bcapi.Call(args, block) |
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if err == errNoCode { |
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err = bind.ErrNoCode |
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} |
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return common.FromHex(out), err |
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} |
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// PendingAccountNonce implements bind.ContractTransactor retrieving the current
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// pending nonce associated with an account.
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func (b *ContractBackend) PendingAccountNonce(account common.Address) (uint64, error) { |
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out, err := b.txapi.GetTransactionCount(account, rpc.PendingBlockNumber) |
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return out.Uint64(), err |
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} |
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// SuggestGasPrice implements bind.ContractTransactor retrieving the currently
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// suggested gas price to allow a timely execution of a transaction.
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func (b *ContractBackend) SuggestGasPrice() (*big.Int, error) { |
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return b.eapi.GasPrice(), nil |
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} |
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// EstimateGasLimit implements bind.ContractTransactor triing to estimate the gas
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// needed to execute a specific transaction based on the current pending state of
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// the backend blockchain. There is no guarantee that this is the true gas limit
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// requirement as other transactions may be added or removed by miners, but it
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// should provide a basis for setting a reasonable default.
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func (b *ContractBackend) EstimateGasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) { |
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out, err := b.bcapi.EstimateGas(CallArgs{ |
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From: sender, |
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To: contract, |
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Value: *rpc.NewHexNumber(value), |
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Data: common.ToHex(data), |
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}) |
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if err == errNoCode { |
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err = bind.ErrNoCode |
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} |
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return out.BigInt(), err |
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} |
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// SendTransaction implements bind.ContractTransactor injects the transaction
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// into the pending pool for execution.
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func (b *ContractBackend) SendTransaction(tx *types.Transaction) error { |
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raw, _ := rlp.EncodeToBytes(tx) |
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_, err := b.txapi.SendRawTransaction(common.ToHex(raw)) |
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return err |
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} |
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@ -0,0 +1,147 @@ |
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// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package release contains the node service that tracks client releases.
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package release |
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import ( |
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"fmt" |
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"strings" |
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"time" |
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"github.com/ethereum/go-ethereum/accounts/abi/bind" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/eth" |
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"github.com/ethereum/go-ethereum/logger" |
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"github.com/ethereum/go-ethereum/logger/glog" |
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"github.com/ethereum/go-ethereum/node" |
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"github.com/ethereum/go-ethereum/p2p" |
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"github.com/ethereum/go-ethereum/rpc" |
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) |
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// Interval to check for new releases
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const releaseRecheckInterval = time.Hour |
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// Config contains the configurations of the release service.
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type Config struct { |
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Oracle common.Address // Ethereum address of the release oracle
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Major uint32 // Major version component of the release
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Minor uint32 // Minor version component of the release
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Patch uint32 // Patch version component of the release
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Commit [20]byte // Git SHA1 commit hash of the release
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} |
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// ReleaseService is a node service that periodically checks the blockchain for
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// newly released versions of the client being run and issues a warning to the
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// user about it.
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type ReleaseService struct { |
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config Config // Current version to check releases against
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oracle *ReleaseOracle // Native binding to the release oracle contract
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quit chan chan error // Quit channel to terminate the version checker
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} |
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// NewReleaseService creates a new service to periodically check for new client
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// releases and notify the user of such.
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func NewReleaseService(ctx *node.ServiceContext, config Config) (node.Service, error) { |
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// Retrieve the Ethereum service dependency to access the blockchain
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var ethereum *eth.Ethereum |
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if err := ctx.Service(ðereum); err != nil { |
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return nil, err |
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} |
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// Construct the release service
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contract, err := NewReleaseOracle(config.Oracle, eth.NewContractBackend(ethereum)) |
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if err != nil { |
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return nil, err |
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} |
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return &ReleaseService{ |
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config: config, |
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oracle: contract, |
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quit: make(chan chan error), |
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}, nil |
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} |
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// Protocols returns an empty list of P2P protocols as the release service does
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// not have a networking component.
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func (r *ReleaseService) Protocols() []p2p.Protocol { return nil } |
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// APIs returns an empty list of RPC descriptors as the release service does not
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// expose any functioanlity to the outside world.
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func (r *ReleaseService) APIs() []rpc.API { return nil } |
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// Start spawns the periodic version checker goroutine
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func (r *ReleaseService) Start(server *p2p.Server) error { |
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go r.checker() |
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return nil |
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} |
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// Stop terminates all goroutines belonging to the service, blocking until they
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// are all terminated.
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func (r *ReleaseService) Stop() error { |
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errc := make(chan error) |
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r.quit <- errc |
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return <-errc |
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} |
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// checker runs indefinitely in the background, periodically checking for new
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// client releases.
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func (r *ReleaseService) checker() { |
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// Set up the timers to periodically check for releases
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timer := time.NewTimer(0) // Immediately fire a version check
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defer timer.Stop() |
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for { |
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select { |
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// If the time arrived, check for a new release
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case <-timer.C: |
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// Rechedule the timer before continuing
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timer.Reset(releaseRecheckInterval) |
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// Retrieve the current version, and handle missing contracts gracefully
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version, err := r.oracle.CurrentVersion(nil) |
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if err != nil { |
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if err == bind.ErrNoCode { |
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glog.V(logger.Debug).Infof("Release oracle not found at %x", r.config.Oracle) |
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continue |
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} |
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glog.V(logger.Error).Infof("Failed to retrieve current release: %v", err) |
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continue |
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} |
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// Version was successfully retrieved, notify if newer than ours
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if version.Major > r.config.Major || |
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(version.Major == r.config.Major && version.Minor > r.config.Minor) || |
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(version.Major == r.config.Major && version.Minor == r.config.Minor && version.Patch > r.config.Patch) { |
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warning := fmt.Sprintf("Client v%d.%d.%d-%x seems older than the latest upstream release v%d.%d.%d-%x", |
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r.config.Major, r.config.Minor, r.config.Patch, r.config.Commit[:4], version.Major, version.Minor, version.Patch, version.Commit[:4]) |
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howtofix := fmt.Sprintf("Please check https://github.com/ethereum/go-ethereum/releases for new releases") |
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separator := strings.Repeat("-", len(warning)) |
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glog.V(logger.Warn).Info(separator) |
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glog.V(logger.Warn).Info(warning) |
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glog.V(logger.Warn).Info(howtofix) |
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glog.V(logger.Warn).Info(separator) |
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} else { |
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glog.V(logger.Debug).Infof("Client v%d.%d.%d-%x seems up to date with upstream v%d.%d.%d-%x", |
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r.config.Major, r.config.Minor, r.config.Patch, r.config.Commit[:4], version.Major, version.Minor, version.Patch, version.Commit[:4]) |
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} |
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// If termination was requested, return
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case errc := <-r.quit: |
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errc <- nil |
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return |
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} |
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} |
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} |
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