34b1373a68
This refactors the code that locates blocks (inventory discovery) out of server and into blockchain where it can make use of the new much more efficient chain view and more easily be tested. As an aside, it really belongs in blockchain anyways since it's purely dealing with the block index and best chain. Since the majority of the network has moved to header-based semantics, this also provides an additional optimization to allow headers to be located directly versus needing to first discover the hashes and then fetch the headers. The new functions are named LocateBlocks and LocateHeaders. The former returns a slice of located hashes and the latter returns a slice of located headers. Finally, it also updates the RPC server getheaders call and related plumbing to use the new LocateHeaders function. A comprehensive suite of tests is provided to ensure both functions behave correctly for both correct and incorrect block locators.
278 lines
9.3 KiB
Go
278 lines
9.3 KiB
Go
// Copyright (c) 2017 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"sync/atomic"
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"github.com/btcsuite/btcd/blockchain"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/mempool"
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"github.com/btcsuite/btcd/peer"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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)
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// rpcPeer provides a peer for use with the RPC server and implements the
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// rpcserverPeer interface.
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type rpcPeer serverPeer
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// Ensure rpcPeer implements the rpcserverPeer interface.
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var _ rpcserverPeer = (*rpcPeer)(nil)
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// ToPeer returns the underlying peer instance.
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//
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// This function is safe for concurrent access and is part of the rpcserverPeer
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// interface implementation.
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func (p *rpcPeer) ToPeer() *peer.Peer {
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if p == nil {
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return nil
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}
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return (*serverPeer)(p).Peer
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}
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// IsTxRelayDisabled returns whether or not the peer has disabled transaction
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// relay.
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//
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// This function is safe for concurrent access and is part of the rpcserverPeer
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// interface implementation.
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func (p *rpcPeer) IsTxRelayDisabled() bool {
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return (*serverPeer)(p).disableRelayTx
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}
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// BanScore returns the current integer value that represents how close the peer
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// is to being banned.
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//
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// This function is safe for concurrent access and is part of the rpcserverPeer
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// interface implementation.
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func (p *rpcPeer) BanScore() uint32 {
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return (*serverPeer)(p).banScore.Int()
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}
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// FeeFilter returns the requested current minimum fee rate for which
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// transactions should be announced.
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//
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// This function is safe for concurrent access and is part of the rpcserverPeer
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// interface implementation.
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func (p *rpcPeer) FeeFilter() int64 {
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return atomic.LoadInt64(&(*serverPeer)(p).feeFilter)
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}
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// rpcConnManager provides a connection manager for use with the RPC server and
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// implements the rpcserverConnManager interface.
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type rpcConnManager struct {
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server *server
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}
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// Ensure rpcConnManager implements the rpcserverConnManager interface.
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var _ rpcserverConnManager = &rpcConnManager{}
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// Connect adds the provided address as a new outbound peer. The permanent flag
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// indicates whether or not to make the peer persistent and reconnect if the
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// connection is lost. Attempting to connect to an already existing peer will
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// return an error.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) Connect(addr string, permanent bool) error {
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replyChan := make(chan error)
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cm.server.query <- connectNodeMsg{
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addr: addr,
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permanent: permanent,
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reply: replyChan,
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}
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return <-replyChan
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}
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// RemoveByID removes the peer associated with the provided id from the list of
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// persistent peers. Attempting to remove an id that does not exist will return
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// an error.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) RemoveByID(id int32) error {
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replyChan := make(chan error)
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cm.server.query <- removeNodeMsg{
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cmp: func(sp *serverPeer) bool { return sp.ID() == id },
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reply: replyChan,
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}
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return <-replyChan
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}
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// RemoveByAddr removes the peer associated with the provided address from the
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// list of persistent peers. Attempting to remove an address that does not
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// exist will return an error.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) RemoveByAddr(addr string) error {
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replyChan := make(chan error)
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cm.server.query <- removeNodeMsg{
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cmp: func(sp *serverPeer) bool { return sp.Addr() == addr },
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reply: replyChan,
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}
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return <-replyChan
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}
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// DisconnectByID disconnects the peer associated with the provided id. This
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// applies to both inbound and outbound peers. Attempting to remove an id that
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// does not exist will return an error.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) DisconnectByID(id int32) error {
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replyChan := make(chan error)
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cm.server.query <- disconnectNodeMsg{
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cmp: func(sp *serverPeer) bool { return sp.ID() == id },
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reply: replyChan,
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}
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return <-replyChan
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}
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// DisconnectByAddr disconnects the peer associated with the provided address.
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// This applies to both inbound and outbound peers. Attempting to remove an
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// address that does not exist will return an error.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) DisconnectByAddr(addr string) error {
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replyChan := make(chan error)
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cm.server.query <- disconnectNodeMsg{
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cmp: func(sp *serverPeer) bool { return sp.Addr() == addr },
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reply: replyChan,
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}
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return <-replyChan
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}
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// ConnectedCount returns the number of currently connected peers.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) ConnectedCount() int32 {
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return cm.server.ConnectedCount()
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}
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// NetTotals returns the sum of all bytes received and sent across the network
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// for all peers.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) NetTotals() (uint64, uint64) {
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return cm.server.NetTotals()
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}
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// ConnectedPeers returns an array consisting of all connected peers.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) ConnectedPeers() []rpcserverPeer {
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replyChan := make(chan []*serverPeer)
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cm.server.query <- getPeersMsg{reply: replyChan}
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serverPeers := <-replyChan
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// Convert to RPC server peers.
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peers := make([]rpcserverPeer, 0, len(serverPeers))
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for _, sp := range serverPeers {
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peers = append(peers, (*rpcPeer)(sp))
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}
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return peers
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}
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// PersistentPeers returns an array consisting of all the added persistent
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// peers.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) PersistentPeers() []rpcserverPeer {
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replyChan := make(chan []*serverPeer)
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cm.server.query <- getAddedNodesMsg{reply: replyChan}
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serverPeers := <-replyChan
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// Convert to generic peers.
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peers := make([]rpcserverPeer, 0, len(serverPeers))
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for _, sp := range serverPeers {
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peers = append(peers, (*rpcPeer)(sp))
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}
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return peers
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}
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// BroadcastMessage sends the provided message to all currently connected peers.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) BroadcastMessage(msg wire.Message) {
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cm.server.BroadcastMessage(msg)
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}
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// AddRebroadcastInventory adds the provided inventory to the list of
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// inventories to be rebroadcast at random intervals until they show up in a
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// block.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverConnManager interface implementation.
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func (cm *rpcConnManager) AddRebroadcastInventory(iv *wire.InvVect, data interface{}) {
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cm.server.AddRebroadcastInventory(iv, data)
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}
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// RelayTransactions generates and relays inventory vectors for all of the
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// passed transactions to all connected peers.
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func (cm *rpcConnManager) RelayTransactions(txns []*mempool.TxDesc) {
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cm.server.relayTransactions(txns)
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}
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// rpcSyncMgr provides a block manager for use with the RPC server and
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// implements the rpcserverSyncManager interface.
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type rpcSyncMgr struct {
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server *server
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blockMgr *blockManager
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}
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// Ensure rpcSyncMgr implements the rpcserverSyncManager interface.
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var _ rpcserverSyncManager = (*rpcSyncMgr)(nil)
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// IsCurrent returns whether or not the sync manager believes the chain is
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// current as compared to the rest of the network.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverSyncManager interface implementation.
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func (b *rpcSyncMgr) IsCurrent() bool {
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return b.blockMgr.IsCurrent()
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}
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// SubmitBlock submits the provided block to the network after processing it
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// locally.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverSyncManager interface implementation.
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func (b *rpcSyncMgr) SubmitBlock(block *btcutil.Block, flags blockchain.BehaviorFlags) (bool, error) {
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return b.blockMgr.ProcessBlock(block, flags)
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}
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// Pause pauses the sync manager until the returned channel is closed.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverSyncManager interface implementation.
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func (b *rpcSyncMgr) Pause() chan<- struct{} {
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return b.blockMgr.Pause()
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}
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// SyncPeerID returns the peer that is currently the peer being used to sync
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// from.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverSyncManager interface implementation.
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func (b *rpcSyncMgr) SyncPeerID() int32 {
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return b.blockMgr.SyncPeerID()
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}
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// LocateBlocks returns the hashes of the blocks after the first known block in
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// the provided locators until the provided stop hash or the current tip is
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// reached, up to a max of wire.MaxBlockHeadersPerMsg hashes.
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//
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// This function is safe for concurrent access and is part of the
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// rpcserverSyncManager interface implementation.
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func (b *rpcSyncMgr) LocateHeaders(locators []*chainhash.Hash, hashStop *chainhash.Hash) []wire.BlockHeader {
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return b.server.chain.LocateHeaders(locators, hashStop)
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}
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