lbcd/rpcclient/infrastructure.go

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// Copyright (c) 2014-2017 The btcsuite developers
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// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package rpcclient
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import (
"bytes"
"container/list"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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"io/ioutil"
"math"
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"net"
"net/http"
"net/url"
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"os"
"strings"
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"sync"
"sync/atomic"
"time"
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2018-05-15 05:44:11 +02:00
"github.com/btcsuite/btcd/btcjson"
"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/go-socks/socks"
"github.com/btcsuite/websocket"
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)
var (
// ErrInvalidAuth is an error to describe the condition where the client
// is either unable to authenticate or the specified endpoint is
// incorrect.
ErrInvalidAuth = errors.New("authentication failure")
// ErrInvalidEndpoint is an error to describe the condition where the
// websocket handshake failed with the specified endpoint.
ErrInvalidEndpoint = errors.New("the endpoint either does not support " +
"websockets or does not exist")
// ErrClientNotConnected is an error to describe the condition where a
// websocket client has been created, but the connection was never
// established. This condition differs from ErrClientDisconnect, which
// represents an established connection that was lost.
ErrClientNotConnected = errors.New("the client was never connected")
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// ErrClientDisconnect is an error to describe the condition where the
// client has been disconnected from the RPC server. When the
// DisableAutoReconnect option is not set, any outstanding futures
// when a client disconnect occurs will return this error as will
// any new requests.
ErrClientDisconnect = errors.New("the client has been disconnected")
// ErrClientShutdown is an error to describe the condition where the
// client is either already shutdown, or in the process of shutting
// down. Any outstanding futures when a client shutdown occurs will
// return this error as will any new requests.
ErrClientShutdown = errors.New("the client has been shutdown")
// ErrNotWebsocketClient is an error to describe the condition of
// calling a Client method intended for a websocket client when the
// client has been configured to run in HTTP POST mode instead.
ErrNotWebsocketClient = errors.New("client is not configured for " +
"websockets")
// ErrClientAlreadyConnected is an error to describe the condition where
// a new client connection cannot be established due to a websocket
// client having already connected to the RPC server.
ErrClientAlreadyConnected = errors.New("websocket client has already " +
"connected")
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)
const (
// sendBufferSize is the number of elements the websocket send channel
// can queue before blocking.
sendBufferSize = 50
// sendPostBufferSize is the number of elements the HTTP POST send
// channel can queue before blocking.
sendPostBufferSize = 100
// connectionRetryInterval is the amount of time to wait in between
// retries when automatically reconnecting to an RPC server.
connectionRetryInterval = time.Second * 5
)
// sendPostDetails houses an HTTP POST request to send to an RPC server as well
// as the original JSON-RPC command and a channel to reply on when the server
// responds with the result.
type sendPostDetails struct {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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httpRequest *http.Request
jsonRequest *jsonRequest
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}
// jsonRequest holds information about a json request that is used to properly
// detect, interpret, and deliver a reply to it.
type jsonRequest struct {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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id uint64
method string
cmd interface{}
marshalledJSON []byte
responseChan chan *response
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}
// BackendVersion represents the version of the backend the client is currently
// connected to.
type BackendVersion uint8
const (
// BitcoindPre19 represents a bitcoind version before 0.19.0.
BitcoindPre19 BackendVersion = iota
// BitcoindPost19 represents a bitcoind version equal to or greater than
// 0.19.0.
BitcoindPost19
// Btcd represents a catch-all btcd version.
Btcd
)
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// Client represents a Bitcoin RPC client which allows easy access to the
// various RPC methods available on a Bitcoin RPC server. Each of the wrapper
// functions handle the details of converting the passed and return types to and
// from the underlying JSON types which are required for the JSON-RPC
// invocations
//
// The client provides each RPC in both synchronous (blocking) and asynchronous
// (non-blocking) forms. The asynchronous forms are based on the concept of
// futures where they return an instance of a type that promises to deliver the
// result of the invocation at some future time. Invoking the Receive method on
// the returned future will block until the result is available if it's not
// already.
type Client struct {
id uint64 // atomic, so must stay 64-bit aligned
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// config holds the connection configuration assoiated with this client.
config *ConnConfig
// chainParams holds the params for the chain that this client is using,
// and is used for many wallet methods.
chainParams *chaincfg.Params
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// wsConn is the underlying websocket connection when not in HTTP POST
// mode.
wsConn *websocket.Conn
// httpClient is the underlying HTTP client to use when running in HTTP
// POST mode.
httpClient *http.Client
// backendVersion is the version of the backend the client is currently
// connected to. This should be retrieved through GetVersion.
backendVersionMu sync.Mutex
backendVersion *BackendVersion
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// mtx is a mutex to protect access to connection related fields.
mtx sync.Mutex
// disconnected indicated whether or not the server is disconnected.
disconnected bool
// retryCount holds the number of times the client has tried to
// reconnect to the RPC server.
retryCount int64
// Track command and their response channels by ID.
requestLock sync.Mutex
requestMap map[uint64]*list.Element
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requestList *list.List
// Notifications.
ntfnHandlers *NotificationHandlers
ntfnStateLock sync.Mutex
ntfnState *notificationState
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// Networking infrastructure.
sendChan chan []byte
sendPostChan chan *sendPostDetails
connEstablished chan struct{}
disconnect chan struct{}
shutdown chan struct{}
wg sync.WaitGroup
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}
// NextID returns the next id to be used when sending a JSON-RPC message. This
// ID allows responses to be associated with particular requests per the
// JSON-RPC specification. Typically the consumer of the client does not need
// to call this function, however, if a custom request is being created and used
// this function should be used to ensure the ID is unique amongst all requests
// being made.
func (c *Client) NextID() uint64 {
return atomic.AddUint64(&c.id, 1)
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}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// addRequest associates the passed jsonRequest with its id. This allows the
// response from the remote server to be unmarshalled to the appropriate type
// and sent to the specified channel when it is received.
//
// If the client has already begun shutting down, ErrClientShutdown is returned
// and the request is not added.
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//
// This function is safe for concurrent access.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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func (c *Client) addRequest(jReq *jsonRequest) error {
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c.requestLock.Lock()
defer c.requestLock.Unlock()
// A non-blocking read of the shutdown channel with the request lock
// held avoids adding the request to the client's internal data
// structures if the client is in the process of shutting down (and
// has not yet grabbed the request lock), or has finished shutdown
// already (responding to each outstanding request with
// ErrClientShutdown).
select {
case <-c.shutdown:
return ErrClientShutdown
default:
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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element := c.requestList.PushBack(jReq)
c.requestMap[jReq.id] = element
return nil
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}
// removeRequest returns and removes the jsonRequest which contains the response
// channel and original method associated with the passed id or nil if there is
// no association.
//
// This function is safe for concurrent access.
func (c *Client) removeRequest(id uint64) *jsonRequest {
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c.requestLock.Lock()
defer c.requestLock.Unlock()
element := c.requestMap[id]
if element != nil {
delete(c.requestMap, id)
request := c.requestList.Remove(element).(*jsonRequest)
return request
}
return nil
}
// removeAllRequests removes all the jsonRequests which contain the response
// channels for outstanding requests.
//
// This function MUST be called with the request lock held.
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func (c *Client) removeAllRequests() {
c.requestMap = make(map[uint64]*list.Element)
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c.requestList.Init()
}
// trackRegisteredNtfns examines the passed command to see if it is one of
// the notification commands and updates the notification state that is used
// to automatically re-establish registered notifications on reconnects.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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func (c *Client) trackRegisteredNtfns(cmd interface{}) {
// Nothing to do if the caller is not interested in notifications.
if c.ntfnHandlers == nil {
return
}
c.ntfnStateLock.Lock()
defer c.ntfnStateLock.Unlock()
switch bcmd := cmd.(type) {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
case *btcjson.NotifyBlocksCmd:
c.ntfnState.notifyBlocks = true
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
case *btcjson.NotifyNewTransactionsCmd:
if bcmd.Verbose != nil && *bcmd.Verbose {
c.ntfnState.notifyNewTxVerbose = true
} else {
c.ntfnState.notifyNewTx = true
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
case *btcjson.NotifySpentCmd:
for _, op := range bcmd.OutPoints {
c.ntfnState.notifySpent[op] = struct{}{}
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
case *btcjson.NotifyReceivedCmd:
for _, addr := range bcmd.Addresses {
c.ntfnState.notifyReceived[addr] = struct{}{}
}
}
}
// inMessage is the first type that an incoming message is unmarshaled
// into. It supports both requests (for notification support) and
// responses. The partially-unmarshaled message is a notification if
// the embedded ID (from the response) is nil. Otherwise, it is a
// response.
type inMessage struct {
ID *float64 `json:"id"`
*rawNotification
*rawResponse
}
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// rawNotification is a partially-unmarshaled JSON-RPC notification.
type rawNotification struct {
Method string `json:"method"`
Params []json.RawMessage `json:"params"`
}
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// rawResponse is a partially-unmarshaled JSON-RPC response. For this
// to be valid (according to JSON-RPC 1.0 spec), ID may not be nil.
type rawResponse struct {
Result json.RawMessage `json:"result"`
Error *btcjson.RPCError `json:"error"`
}
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// response is the raw bytes of a JSON-RPC result, or the error if the response
// error object was non-null.
type response struct {
result []byte
err error
}
// result checks whether the unmarshaled response contains a non-nil error,
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// returning an unmarshaled btcjson.RPCError (or an unmarshaling error) if so.
// If the response is not an error, the raw bytes of the request are
// returned for further unmashaling into specific result types.
func (r rawResponse) result() (result []byte, err error) {
if r.Error != nil {
return nil, r.Error
}
return r.Result, nil
}
// handleMessage is the main handler for incoming notifications and responses.
func (c *Client) handleMessage(msg []byte) {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// Attempt to unmarshal the message as either a notification or
// response.
var in inMessage
in.rawResponse = new(rawResponse)
in.rawNotification = new(rawNotification)
err := json.Unmarshal(msg, &in)
if err != nil {
log.Warnf("Remote server sent invalid message: %v", err)
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return
}
// JSON-RPC 1.0 notifications are requests with a null id.
if in.ID == nil {
ntfn := in.rawNotification
if ntfn == nil {
log.Warn("Malformed notification: missing " +
"method and parameters")
return
}
if ntfn.Method == "" {
log.Warn("Malformed notification: missing method")
return
}
// params are not optional: nil isn't valid (but len == 0 is)
if ntfn.Params == nil {
log.Warn("Malformed notification: missing params")
return
}
// Deliver the notification.
log.Tracef("Received notification [%s]", in.Method)
c.handleNotification(in.rawNotification)
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return
}
// ensure that in.ID can be converted to an integer without loss of precision
if *in.ID < 0 || *in.ID != math.Trunc(*in.ID) {
log.Warn("Malformed response: invalid identifier")
return
}
if in.rawResponse == nil {
log.Warn("Malformed response: missing result and error")
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return
}
id := uint64(*in.ID)
log.Tracef("Received response for id %d (result %s)", id, in.Result)
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request := c.removeRequest(id)
// Nothing more to do if there is no request associated with this reply.
if request == nil || request.responseChan == nil {
log.Warnf("Received unexpected reply: %s (id %d)", in.Result,
id)
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return
}
// Since the command was successful, examine it to see if it's a
// notification, and if is, add it to the notification state so it
// can automatically be re-established on reconnect.
c.trackRegisteredNtfns(request.cmd)
// Deliver the response.
result, err := in.rawResponse.result()
request.responseChan <- &response{result: result, err: err}
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}
// shouldLogReadError returns whether or not the passed error, which is expected
// to have come from reading from the websocket connection in wsInHandler,
// should be logged.
func (c *Client) shouldLogReadError(err error) bool {
// No logging when the connetion is being forcibly disconnected.
select {
case <-c.shutdown:
return false
default:
}
// No logging when the connection has been disconnected.
if err == io.EOF {
return false
}
if opErr, ok := err.(*net.OpError); ok && !opErr.Temporary() {
return false
}
return true
}
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// wsInHandler handles all incoming messages for the websocket connection
// associated with the client. It must be run as a goroutine.
func (c *Client) wsInHandler() {
out:
for {
// Break out of the loop once the shutdown channel has been
// closed. Use a non-blocking select here so we fall through
// otherwise.
select {
case <-c.shutdown:
break out
default:
}
_, msg, err := c.wsConn.ReadMessage()
if err != nil {
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// Log the error if it's not due to disconnecting.
if c.shouldLogReadError(err) {
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log.Errorf("Websocket receive error from "+
"%s: %v", c.config.Host, err)
}
break out
}
c.handleMessage(msg)
}
// Ensure the connection is closed.
c.Disconnect()
c.wg.Done()
log.Tracef("RPC client input handler done for %s", c.config.Host)
}
// disconnectChan returns a copy of the current disconnect channel. The channel
// is read protected by the client mutex, and is safe to call while the channel
// is being reassigned during a reconnect.
func (c *Client) disconnectChan() <-chan struct{} {
c.mtx.Lock()
ch := c.disconnect
c.mtx.Unlock()
return ch
}
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// wsOutHandler handles all outgoing messages for the websocket connection. It
// uses a buffered channel to serialize output messages while allowing the
// sender to continue running asynchronously. It must be run as a goroutine.
func (c *Client) wsOutHandler() {
out:
for {
// Send any messages ready for send until the client is
// disconnected closed.
select {
case msg := <-c.sendChan:
err := c.wsConn.WriteMessage(websocket.TextMessage, msg)
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if err != nil {
c.Disconnect()
break out
}
case <-c.disconnectChan():
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break out
}
}
// Drain any channels before exiting so nothing is left waiting around
// to send.
cleanup:
for {
select {
case <-c.sendChan:
default:
break cleanup
}
}
c.wg.Done()
log.Tracef("RPC client output handler done for %s", c.config.Host)
}
// sendMessage sends the passed JSON to the connected server using the
// websocket connection. It is backed by a buffered channel, so it will not
// block until the send channel is full.
func (c *Client) sendMessage(marshalledJSON []byte) {
// Don't send the message if disconnected.
select {
case c.sendChan <- marshalledJSON:
case <-c.disconnectChan():
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return
}
}
// reregisterNtfns creates and sends commands needed to re-establish the current
// notification state associated with the client. It should only be called on
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// on reconnect by the resendRequests function.
func (c *Client) reregisterNtfns() error {
// Nothing to do if the caller is not interested in notifications.
if c.ntfnHandlers == nil {
return nil
}
// In order to avoid holding the lock on the notification state for the
// entire time of the potentially long running RPCs issued below, make a
// copy of it and work from that.
//
// Also, other commands will be running concurrently which could modify
// the notification state (while not under the lock of course) which
// also register it with the remote RPC server, so this prevents double
// registrations.
c.ntfnStateLock.Lock()
stateCopy := c.ntfnState.Copy()
c.ntfnStateLock.Unlock()
// Reregister notifyblocks if needed.
if stateCopy.notifyBlocks {
log.Debugf("Reregistering [notifyblocks]")
if err := c.NotifyBlocks(); err != nil {
return err
}
}
// Reregister notifynewtransactions if needed.
if stateCopy.notifyNewTx || stateCopy.notifyNewTxVerbose {
log.Debugf("Reregistering [notifynewtransactions] (verbose=%v)",
stateCopy.notifyNewTxVerbose)
err := c.NotifyNewTransactions(stateCopy.notifyNewTxVerbose)
if err != nil {
return err
}
}
// Reregister the combination of all previously registered notifyspent
// outpoints in one command if needed.
nslen := len(stateCopy.notifySpent)
if nslen > 0 {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
outpoints := make([]btcjson.OutPoint, 0, nslen)
for op := range stateCopy.notifySpent {
outpoints = append(outpoints, op)
}
log.Debugf("Reregistering [notifyspent] outpoints: %v", outpoints)
if err := c.notifySpentInternal(outpoints).Receive(); err != nil {
return err
}
}
// Reregister the combination of all previously registered
// notifyreceived addresses in one command if needed.
nrlen := len(stateCopy.notifyReceived)
if nrlen > 0 {
addresses := make([]string, 0, nrlen)
for addr := range stateCopy.notifyReceived {
addresses = append(addresses, addr)
}
log.Debugf("Reregistering [notifyreceived] addresses: %v", addresses)
if err := c.notifyReceivedInternal(addresses).Receive(); err != nil {
return err
}
}
return nil
}
// ignoreResends is a set of all methods for requests that are "long running"
// are not be reissued by the client on reconnect.
var ignoreResends = map[string]struct{}{
"rescan": {},
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// resendRequests resends any requests that had not completed when the client
// disconnected. It is intended to be called once the client has reconnected as
// a separate goroutine.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
func (c *Client) resendRequests() {
// Set the notification state back up. If anything goes wrong,
// disconnect the client.
if err := c.reregisterNtfns(); err != nil {
log.Warnf("Unable to re-establish notification state: %v", err)
c.Disconnect()
return
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// Since it's possible to block on send and more requests might be
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// added by the caller while resending, make a copy of all of the
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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// requests that need to be resent now and work from the copy. This
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// also allows the lock to be released quickly.
c.requestLock.Lock()
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
resendReqs := make([]*jsonRequest, 0, c.requestList.Len())
var nextElem *list.Element
for e := c.requestList.Front(); e != nil; e = nextElem {
nextElem = e.Next()
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
jReq := e.Value.(*jsonRequest)
if _, ok := ignoreResends[jReq.method]; ok {
// If a request is not sent on reconnect, remove it
// from the request structures, since no reply is
// expected.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
delete(c.requestMap, jReq.id)
c.requestList.Remove(e)
} else {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
resendReqs = append(resendReqs, jReq)
}
2014-05-07 18:14:39 +02:00
}
c.requestLock.Unlock()
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
for _, jReq := range resendReqs {
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// Stop resending commands if the client disconnected again
// since the next reconnect will handle them.
if c.Disconnected() {
return
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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log.Tracef("Sending command [%s] with id %d", jReq.method,
jReq.id)
c.sendMessage(jReq.marshalledJSON)
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}
}
// wsReconnectHandler listens for client disconnects and automatically tries
// to reconnect with retry interval that scales based on the number of retries.
// It also resends any commands that had not completed when the client
// disconnected so the disconnect/reconnect process is largely transparent to
// the caller. This function is not run when the DisableAutoReconnect config
// options is set.
//
// This function must be run as a goroutine.
func (c *Client) wsReconnectHandler() {
out:
for {
select {
case <-c.disconnect:
// On disconnect, fallthrough to reestablish the
// connection.
case <-c.shutdown:
break out
}
reconnect:
for {
select {
case <-c.shutdown:
break out
default:
}
wsConn, err := dial(c.config)
if err != nil {
c.retryCount++
log.Infof("Failed to connect to %s: %v",
c.config.Host, err)
// Scale the retry interval by the number of
// retries so there is a backoff up to a max
// of 1 minute.
scaledInterval := connectionRetryInterval.Nanoseconds() * c.retryCount
scaledDuration := time.Duration(scaledInterval)
if scaledDuration > time.Minute {
scaledDuration = time.Minute
}
log.Infof("Retrying connection to %s in "+
"%s", c.config.Host, scaledDuration)
time.Sleep(scaledDuration)
continue reconnect
}
log.Infof("Reestablished connection to RPC server %s",
c.config.Host)
// Reset the version in case the backend was
// disconnected due to an upgrade.
c.backendVersionMu.Lock()
c.backendVersion = nil
c.backendVersionMu.Unlock()
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// Reset the connection state and signal the reconnect
// has happened.
c.wsConn = wsConn
c.retryCount = 0
c.mtx.Lock()
c.disconnect = make(chan struct{})
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c.disconnected = false
c.mtx.Unlock()
// Start processing input and output for the
// new connection.
c.start()
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// Reissue pending requests in another goroutine since
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// the send can block.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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go c.resendRequests()
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// Break out of the reconnect loop back to wait for
// disconnect again.
break reconnect
}
}
c.wg.Done()
log.Tracef("RPC client reconnect handler done for %s", c.config.Host)
}
// handleSendPostMessage handles performing the passed HTTP request, reading the
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// result, unmarshalling it, and delivering the unmarshalled result to the
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// provided response channel.
func (c *Client) handleSendPostMessage(details *sendPostDetails) {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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jReq := details.jsonRequest
log.Tracef("Sending command [%s] with id %d", jReq.method, jReq.id)
httpResponse, err := c.httpClient.Do(details.httpRequest)
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if err != nil {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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jReq.responseChan <- &response{err: err}
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return
}
// Read the raw bytes and close the response.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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respBytes, err := ioutil.ReadAll(httpResponse.Body)
httpResponse.Body.Close()
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if err != nil {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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err = fmt.Errorf("error reading json reply: %v", err)
jReq.responseChan <- &response{err: err}
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return
}
// Try to unmarshal the response as a regular JSON-RPC response.
var resp rawResponse
err = json.Unmarshal(respBytes, &resp)
if err != nil {
// When the response itself isn't a valid JSON-RPC response
// return an error which includes the HTTP status code and raw
// response bytes.
err = fmt.Errorf("status code: %d, response: %q",
httpResponse.StatusCode, string(respBytes))
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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jReq.responseChan <- &response{err: err}
return
}
res, err := resp.result()
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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jReq.responseChan <- &response{result: res, err: err}
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}
// sendPostHandler handles all outgoing messages when the client is running
// in HTTP POST mode. It uses a buffered channel to serialize output messages
// while allowing the sender to continue running asynchronously. It must be run
// as a goroutine.
func (c *Client) sendPostHandler() {
out:
for {
// Send any messages ready for send until the shutdown channel
// is closed.
select {
case details := <-c.sendPostChan:
c.handleSendPostMessage(details)
case <-c.shutdown:
break out
}
}
// Drain any wait channels before exiting so nothing is left waiting
// around to send.
cleanup:
for {
select {
case details := <-c.sendPostChan:
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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details.jsonRequest.responseChan <- &response{
result: nil,
err: ErrClientShutdown,
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}
default:
break cleanup
}
}
c.wg.Done()
log.Tracef("RPC client send handler done for %s", c.config.Host)
}
// sendPostRequest sends the passed HTTP request to the RPC server using the
// HTTP client associated with the client. It is backed by a buffered channel,
// so it will not block until the send channel is full.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
func (c *Client) sendPostRequest(httpReq *http.Request, jReq *jsonRequest) {
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// Don't send the message if shutting down.
select {
case <-c.shutdown:
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
jReq.responseChan <- &response{result: nil, err: ErrClientShutdown}
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default:
}
c.sendPostChan <- &sendPostDetails{
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
jsonRequest: jReq,
httpRequest: httpReq,
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}
}
// newFutureError returns a new future result channel that already has the
// passed error waitin on the channel with the reply set to nil. This is useful
// to easily return errors from the various Async functions.
func newFutureError(err error) chan *response {
responseChan := make(chan *response, 1)
responseChan <- &response{err: err}
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return responseChan
}
// receiveFuture receives from the passed futureResult channel to extract a
// reply or any errors. The examined errors include an error in the
// futureResult and the error in the reply from the server. This will block
// until the result is available on the passed channel.
func receiveFuture(f chan *response) ([]byte, error) {
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// Wait for a response on the returned channel.
r := <-f
return r.result, r.err
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}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
// sendPost sends the passed request to the server by issuing an HTTP POST
// request using the provided response channel for the reply. Typically a new
// connection is opened and closed for each command when using this method,
// however, the underlying HTTP client might coalesce multiple commands
// depending on several factors including the remote server configuration.
func (c *Client) sendPost(jReq *jsonRequest) {
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// Generate a request to the configured RPC server.
protocol := "http"
if !c.config.DisableTLS {
protocol = "https"
}
url := protocol + "://" + c.config.Host
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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bodyReader := bytes.NewReader(jReq.marshalledJSON)
httpReq, err := http.NewRequest("POST", url, bodyReader)
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if err != nil {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
2015-01-01 23:34:07 +01:00
jReq.responseChan <- &response{result: nil, err: err}
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return
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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httpReq.Close = true
httpReq.Header.Set("Content-Type", "application/json")
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// Configure basic access authorization.
user, pass, err := c.config.getAuth()
if err != nil {
jReq.responseChan <- &response{result: nil, err: err}
return
}
httpReq.SetBasicAuth(user, pass)
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Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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log.Tracef("Sending command [%s] with id %d", jReq.method, jReq.id)
c.sendPostRequest(httpReq, jReq)
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}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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// sendRequest sends the passed json request to the associated server using the
// provided response channel for the reply. It handles both websocket and HTTP
// POST mode depending on the configuration of the client.
func (c *Client) sendRequest(jReq *jsonRequest) {
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// Choose which marshal and send function to use depending on whether
// the client running in HTTP POST mode or not. When running in HTTP
// POST mode, the command is issued via an HTTP client. Otherwise,
// the command is issued via the asynchronous websocket channels.
if c.config.HTTPPostMode {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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c.sendPost(jReq)
return
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}
// Check whether the websocket connection has never been established,
// in which case the handler goroutines are not running.
select {
case <-c.connEstablished:
default:
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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jReq.responseChan <- &response{err: ErrClientNotConnected}
return
}
// Add the request to the internal tracking map so the response from the
// remote server can be properly detected and routed to the response
// channel. Then send the marshalled request via the websocket
// connection.
if err := c.addRequest(jReq); err != nil {
jReq.responseChan <- &response{err: err}
return
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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log.Tracef("Sending command [%s] with id %d", jReq.method, jReq.id)
c.sendMessage(jReq.marshalledJSON)
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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// sendCmd sends the passed command to the associated server and returns a
// response channel on which the reply will be delivered at some point in the
// future. It handles both websocket and HTTP POST mode depending on the
// configuration of the client.
func (c *Client) sendCmd(cmd interface{}) chan *response {
// Get the method associated with the command.
method, err := btcjson.CmdMethod(cmd)
if err != nil {
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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return newFutureError(err)
}
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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// Marshal the command.
id := c.NextID()
marshalledJSON, err := btcjson.MarshalCmd(id, cmd)
if err != nil {
return newFutureError(err)
}
// Generate the request and send it along with a channel to respond on.
responseChan := make(chan *response, 1)
jReq := &jsonRequest{
id: id,
method: method,
cmd: cmd,
marshalledJSON: marshalledJSON,
responseChan: responseChan,
}
c.sendRequest(jReq)
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return responseChan
}
// sendCmdAndWait sends the passed command to the associated server, waits
// for the reply, and returns the result from it. It will return the error
// field in the reply if there is one.
Update to make use of latest version of btcjson. This commit contains several changes needed to update the client to use the latest version of btcjson. In addition, it contains a couple of other minor changes along the way. While the underlying changes are quite large, the public API of this package is still the same, so caller should generally not have to update their code due to that. However, the underlying btcjson package API has changed significantly. Since this package hides the vast majority of that from callers, it should not afffect them very much. However, one area in particular to watch out for is that the old btcjson.Error is now btcjson.RPCError, so any callers doing any type assertions there will need to update. The following is a summary of the changes: - The underlying btcjson significantly changed how commands work, so the internals of this package have been reworked to be based off of requests instead of the now non-existant btcjson.Cmd interface - Update all call sites of btcjson.New<Foo>Cmd since they can no longer error or take varargs - The ids for each request are part of the request now instead of the command to match the new btcjson model and are strict uint64s so type assertions are no longer needed (slightly improved efficiency) - Remove the old temporary workaround for the getbalance command with an account of "*" since btcwallet has since been fixed - Change all instances of JSONToAmount to btcutil.NewAmount since that function was removed in favor of btcutil.Amount - Change all btcws invocations to btcjson since they have been combined
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func (c *Client) sendCmdAndWait(cmd interface{}) (interface{}, error) {
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// Marshal the command to JSON-RPC, send it to the connected server, and
// wait for a response on the returned channel.
return receiveFuture(c.sendCmd(cmd))
}
// Disconnected returns whether or not the server is disconnected. If a
// websocket client was created but never connected, this also returns false.
func (c *Client) Disconnected() bool {
c.mtx.Lock()
defer c.mtx.Unlock()
select {
case <-c.connEstablished:
return c.disconnected
default:
return false
}
}
// doDisconnect disconnects the websocket associated with the client if it
// hasn't already been disconnected. It will return false if the disconnect is
// not needed or the client is running in HTTP POST mode.
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//
// This function is safe for concurrent access.
func (c *Client) doDisconnect() bool {
if c.config.HTTPPostMode {
return false
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}
c.mtx.Lock()
defer c.mtx.Unlock()
// Nothing to do if already disconnected.
if c.disconnected {
return false
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}
log.Tracef("Disconnecting RPC client %s", c.config.Host)
close(c.disconnect)
if c.wsConn != nil {
c.wsConn.Close()
}
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c.disconnected = true
return true
}
// doShutdown closes the shutdown channel and logs the shutdown unless shutdown
// is already in progress. It will return false if the shutdown is not needed.
//
// This function is safe for concurrent access.
func (c *Client) doShutdown() bool {
// Ignore the shutdown request if the client is already in the process
// of shutting down or already shutdown.
select {
case <-c.shutdown:
return false
default:
}
log.Tracef("Shutting down RPC client %s", c.config.Host)
close(c.shutdown)
return true
}
// Disconnect disconnects the current websocket associated with the client. The
// connection will automatically be re-established unless the client was
// created with the DisableAutoReconnect flag.
//
// This function has no effect when the client is running in HTTP POST mode.
func (c *Client) Disconnect() {
// Nothing to do if already disconnected or running in HTTP POST mode.
if !c.doDisconnect() {
return
}
c.requestLock.Lock()
defer c.requestLock.Unlock()
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// When operating without auto reconnect, send errors to any pending
// requests and shutdown the client.
if c.config.DisableAutoReconnect {
for e := c.requestList.Front(); e != nil; e = e.Next() {
req := e.Value.(*jsonRequest)
req.responseChan <- &response{
result: nil,
err: ErrClientDisconnect,
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}
}
c.removeAllRequests()
c.doShutdown()
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}
}
// Shutdown shuts down the client by disconnecting any connections associated
// with the client and, when automatic reconnect is enabled, preventing future
// attempts to reconnect. It also stops all goroutines.
func (c *Client) Shutdown() {
// Do the shutdown under the request lock to prevent clients from
// adding new requests while the client shutdown process is initiated.
c.requestLock.Lock()
defer c.requestLock.Unlock()
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// Ignore the shutdown request if the client is already in the process
// of shutting down or already shutdown.
if !c.doShutdown() {
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return
}
// Send the ErrClientShutdown error to any pending requests.
for e := c.requestList.Front(); e != nil; e = e.Next() {
req := e.Value.(*jsonRequest)
req.responseChan <- &response{
result: nil,
err: ErrClientShutdown,
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}
}
c.removeAllRequests()
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// Disconnect the client if needed.
c.doDisconnect()
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}
// start begins processing input and output messages.
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func (c *Client) start() {
log.Tracef("Starting RPC client %s", c.config.Host)
// Start the I/O processing handlers depending on whether the client is
// in HTTP POST mode or the default websocket mode.
if c.config.HTTPPostMode {
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c.wg.Add(1)
go c.sendPostHandler()
} else {
c.wg.Add(3)
go func() {
if c.ntfnHandlers != nil {
if c.ntfnHandlers.OnClientConnected != nil {
c.ntfnHandlers.OnClientConnected()
}
}
c.wg.Done()
}()
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go c.wsInHandler()
go c.wsOutHandler()
}
}
// WaitForShutdown blocks until the client goroutines are stopped and the
// connection is closed.
func (c *Client) WaitForShutdown() {
c.wg.Wait()
}
// ConnConfig describes the connection configuration parameters for the client.
// This
type ConnConfig struct {
// Host is the IP address and port of the RPC server you want to connect
// to.
Host string
// Endpoint is the websocket endpoint on the RPC server. This is
// typically "ws".
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Endpoint string
// User is the username to use to authenticate to the RPC server.
User string
// Pass is the passphrase to use to authenticate to the RPC server.
Pass string
// CookiePath is the path to a cookie file containing the username and
// passphrase to use to authenticate to the RPC server. It is used
// instead of User and Pass if non-empty.
CookiePath string
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cookieLastCheckTime time.Time
cookieLastModTime time.Time
cookieLastUser string
cookieLastPass string
cookieLastErr error
// Params is the string representing the network that the server
// is running. If there is no parameter set in the config, then
// mainnet will be used by default.
Params string
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// DisableTLS specifies whether transport layer security should be
// disabled. It is recommended to always use TLS if the RPC server
// supports it as otherwise your username and password is sent across
// the wire in cleartext.
DisableTLS bool
// Certificates are the bytes for a PEM-encoded certificate chain used
// for the TLS connection. It has no effect if the DisableTLS parameter
// is true.
Certificates []byte
// Proxy specifies to connect through a SOCKS 5 proxy server. It may
// be an empty string if a proxy is not required.
Proxy string
// ProxyUser is an optional username to use for the proxy server if it
// requires authentication. It has no effect if the Proxy parameter
// is not set.
ProxyUser string
// ProxyPass is an optional password to use for the proxy server if it
// requires authentication. It has no effect if the Proxy parameter
// is not set.
ProxyPass string
// DisableAutoReconnect specifies the client should not automatically
// try to reconnect to the server when it has been disconnected.
DisableAutoReconnect bool
// DisableConnectOnNew specifies that a websocket client connection
// should not be tried when creating the client with New. Instead, the
// client is created and returned unconnected, and Connect must be
// called manually.
DisableConnectOnNew bool
// HTTPPostMode instructs the client to run using multiple independent
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// connections issuing HTTP POST requests instead of using the default
// of websockets. Websockets are generally preferred as some of the
// features of the client such notifications only work with websockets,
// however, not all servers support the websocket extensions, so this
// flag can be set to true to use basic HTTP POST requests instead.
HTTPPostMode bool
// EnableBCInfoHacks is an option provided to enable compatibility hacks
// when connecting to blockchain.info RPC server
EnableBCInfoHacks bool
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}
// getAuth returns the username and passphrase that will actually be used for
// this connection. This will be the result of checking the cookie if a cookie
// path is configured; if not, it will be the user-configured username and
// passphrase.
func (config *ConnConfig) getAuth() (username, passphrase string, err error) {
// Try username+passphrase auth first.
if config.Pass != "" {
return config.User, config.Pass, nil
}
// If no username or passphrase is set, try cookie auth.
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return config.retrieveCookie()
}
// retrieveCookie returns the cookie username and passphrase.
func (config *ConnConfig) retrieveCookie() (username, passphrase string, err error) {
if !config.cookieLastCheckTime.IsZero() && time.Now().Before(config.cookieLastCheckTime.Add(30*time.Second)) {
return config.cookieLastUser, config.cookieLastPass, config.cookieLastErr
}
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config.cookieLastCheckTime = time.Now()
st, err := os.Stat(config.CookiePath)
if err != nil {
config.cookieLastErr = err
return config.cookieLastUser, config.cookieLastPass, config.cookieLastErr
}
modTime := st.ModTime()
if !modTime.Equal(config.cookieLastModTime) {
config.cookieLastModTime = modTime
config.cookieLastUser, config.cookieLastPass, config.cookieLastErr = readCookieFile(config.CookiePath)
}
return config.cookieLastUser, config.cookieLastPass, config.cookieLastErr
}
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// newHTTPClient returns a new http client that is configured according to the
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// proxy and TLS settings in the associated connection configuration.
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func newHTTPClient(config *ConnConfig) (*http.Client, error) {
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// Set proxy function if there is a proxy configured.
var proxyFunc func(*http.Request) (*url.URL, error)
if config.Proxy != "" {
proxyURL, err := url.Parse(config.Proxy)
if err != nil {
return nil, err
}
proxyFunc = http.ProxyURL(proxyURL)
}
// Configure TLS if needed.
var tlsConfig *tls.Config
if !config.DisableTLS {
if len(config.Certificates) > 0 {
pool := x509.NewCertPool()
pool.AppendCertsFromPEM(config.Certificates)
tlsConfig = &tls.Config{
RootCAs: pool,
}
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}
}
client := http.Client{
Transport: &http.Transport{
Proxy: proxyFunc,
TLSClientConfig: tlsConfig,
},
}
return &client, nil
}
// dial opens a websocket connection using the passed connection configuration
// details.
func dial(config *ConnConfig) (*websocket.Conn, error) {
// Setup TLS if not disabled.
var tlsConfig *tls.Config
var scheme = "ws"
if !config.DisableTLS {
tlsConfig = &tls.Config{
MinVersion: tls.VersionTLS12,
}
if len(config.Certificates) > 0 {
pool := x509.NewCertPool()
pool.AppendCertsFromPEM(config.Certificates)
tlsConfig.RootCAs = pool
}
scheme = "wss"
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}
// Create a websocket dialer that will be used to make the connection.
// It is modified by the proxy setting below as needed.
dialer := websocket.Dialer{TLSClientConfig: tlsConfig}
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// Setup the proxy if one is configured.
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if config.Proxy != "" {
proxy := &socks.Proxy{
Addr: config.Proxy,
Username: config.ProxyUser,
Password: config.ProxyPass,
}
dialer.NetDial = proxy.Dial
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}
// The RPC server requires basic authorization, so create a custom
// request header with the Authorization header set.
user, pass, err := config.getAuth()
if err != nil {
return nil, err
}
login := user + ":" + pass
auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(login))
requestHeader := make(http.Header)
requestHeader.Add("Authorization", auth)
// Dial the connection.
url := fmt.Sprintf("%s://%s/%s", scheme, config.Host, config.Endpoint)
wsConn, resp, err := dialer.Dial(url, requestHeader)
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if err != nil {
if err != websocket.ErrBadHandshake || resp == nil {
return nil, err
}
// Detect HTTP authentication error status codes.
if resp.StatusCode == http.StatusUnauthorized ||
resp.StatusCode == http.StatusForbidden {
return nil, ErrInvalidAuth
}
// The connection was authenticated and the status response was
// ok, but the websocket handshake still failed, so the endpoint
// is invalid in some way.
if resp.StatusCode == http.StatusOK {
return nil, ErrInvalidEndpoint
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}
// Return the status text from the server if none of the special
// cases above apply.
return nil, errors.New(resp.Status)
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}
return wsConn, nil
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}
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// New creates a new RPC client based on the provided connection configuration
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// details. The notification handlers parameter may be nil if you are not
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// interested in receiving notifications and will be ignored if the
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// configuration is set to run in HTTP POST mode.
func New(config *ConnConfig, ntfnHandlers *NotificationHandlers) (*Client, error) {
// Either open a websocket connection or create an HTTP client depending
// on the HTTP POST mode. Also, set the notification handlers to nil
// when running in HTTP POST mode.
var wsConn *websocket.Conn
var httpClient *http.Client
connEstablished := make(chan struct{})
var start bool
if config.HTTPPostMode {
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ntfnHandlers = nil
start = true
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var err error
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httpClient, err = newHTTPClient(config)
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if err != nil {
return nil, err
}
} else {
if !config.DisableConnectOnNew {
var err error
wsConn, err = dial(config)
if err != nil {
return nil, err
}
start = true
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}
}
client := &Client{
config: config,
wsConn: wsConn,
httpClient: httpClient,
requestMap: make(map[uint64]*list.Element),
requestList: list.New(),
ntfnHandlers: ntfnHandlers,
ntfnState: newNotificationState(),
sendChan: make(chan []byte, sendBufferSize),
sendPostChan: make(chan *sendPostDetails, sendPostBufferSize),
connEstablished: connEstablished,
disconnect: make(chan struct{}),
shutdown: make(chan struct{}),
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}
// Default network is mainnet, no parameters are necessary but if mainnet
// is specified it will be the param
switch config.Params {
case "":
fallthrough
case chaincfg.MainNetParams.Name:
client.chainParams = &chaincfg.MainNetParams
case chaincfg.TestNet3Params.Name:
client.chainParams = &chaincfg.TestNet3Params
case chaincfg.RegressionNetParams.Name:
client.chainParams = &chaincfg.RegressionNetParams
case chaincfg.SimNetParams.Name:
client.chainParams = &chaincfg.SimNetParams
default:
return nil, fmt.Errorf("rpcclient.New: Unknown chain %s", config.Params)
}
if start {
log.Infof("Established connection to RPC server %s",
config.Host)
close(connEstablished)
client.start()
if !client.config.HTTPPostMode && !client.config.DisableAutoReconnect {
client.wg.Add(1)
go client.wsReconnectHandler()
}
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}
return client, nil
}
// Connect establishes the initial websocket connection. This is necessary when
// a client was created after setting the DisableConnectOnNew field of the
// Config struct.
//
// Up to tries number of connections (each after an increasing backoff) will
// be tried if the connection can not be established. The special value of 0
// indicates an unlimited number of connection attempts.
//
// This method will error if the client is not configured for websockets, if the
// connection has already been established, or if none of the connection
// attempts were successful.
func (c *Client) Connect(tries int) error {
c.mtx.Lock()
defer c.mtx.Unlock()
if c.config.HTTPPostMode {
return ErrNotWebsocketClient
}
if c.wsConn != nil {
return ErrClientAlreadyConnected
}
// Begin connection attempts. Increase the backoff after each failed
// attempt, up to a maximum of one minute.
var err error
var backoff time.Duration
for i := 0; tries == 0 || i < tries; i++ {
var wsConn *websocket.Conn
wsConn, err = dial(c.config)
if err != nil {
backoff = connectionRetryInterval * time.Duration(i+1)
if backoff > time.Minute {
backoff = time.Minute
}
time.Sleep(backoff)
continue
}
// Connection was established. Set the websocket connection
// member of the client and start the goroutines necessary
// to run the client.
log.Infof("Established connection to RPC server %s",
c.config.Host)
c.wsConn = wsConn
close(c.connEstablished)
c.start()
if !c.config.DisableAutoReconnect {
c.wg.Add(1)
go c.wsReconnectHandler()
}
return nil
}
// All connection attempts failed, so return the last error.
return err
}
const (
// bitcoind19Str is the string representation of bitcoind v0.19.0.
bitcoind19Str = "0.19.0"
// bitcoindVersionPrefix specifies the prefix included in every bitcoind
// version exposed through GetNetworkInfo.
bitcoindVersionPrefix = "/Satoshi:"
// bitcoindVersionSuffix specifies the suffix included in every bitcoind
// version exposed through GetNetworkInfo.
bitcoindVersionSuffix = "/"
)
// parseBitcoindVersion parses the bitcoind version from its string
// representation.
func parseBitcoindVersion(version string) BackendVersion {
// Trim the version of its prefix and suffix to determine the
// appropriate version number.
version = strings.TrimPrefix(
strings.TrimSuffix(version, bitcoindVersionSuffix),
bitcoindVersionPrefix,
)
switch {
case version < bitcoind19Str:
return BitcoindPre19
default:
return BitcoindPost19
}
}
// BackendVersion retrieves the version of the backend the client is currently
// connected to.
func (c *Client) BackendVersion() (BackendVersion, error) {
c.backendVersionMu.Lock()
defer c.backendVersionMu.Unlock()
if c.backendVersion != nil {
return *c.backendVersion, nil
}
// We'll start by calling GetInfo. This method doesn't exist for
// bitcoind nodes as of v0.16.0, so we'll assume the client is connected
// to a btcd backend if it does exist.
info, err := c.GetInfo()
switch err := err.(type) {
// Parse the btcd version and cache it.
case nil:
log.Debugf("Detected btcd version: %v", info.Version)
version := Btcd
c.backendVersion = &version
return *c.backendVersion, nil
// Inspect the RPC error to ensure the method was not found, otherwise
// we actually ran into an error.
case *btcjson.RPCError:
if err.Code != btcjson.ErrRPCMethodNotFound.Code {
return 0, fmt.Errorf("unable to detect btcd version: "+
"%v", err)
}
default:
return 0, fmt.Errorf("unable to detect btcd version: %v", err)
}
// Since the GetInfo method was not found, we assume the client is
// connected to a bitcoind backend, which exposes its version through
// GetNetworkInfo.
networkInfo, err := c.GetNetworkInfo()
if err != nil {
return 0, fmt.Errorf("unable to detect bitcoind version: %v", err)
}
// Parse the bitcoind version and cache it.
log.Debugf("Detected bitcoind version: %v", networkInfo.SubVersion)
version := parseBitcoindVersion(networkInfo.SubVersion)
c.backendVersion = &version
return *c.backendVersion, nil
}