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submitter.go
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submitter.go
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// SPDX-License-Identifier: ISC
// Copyright (c) 2014-2019 Bitmark Inc.
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package main
import (
"encoding/json"
"fmt"
zmq "github.com/pebbe/zmq4"
"github.com/bitmark-inc/logger"
)
const (
submission = "inproc://proof.submit" // to fair-queue found proof submissions
subdeal = "inproc://proof.dealer" // to route to specific submitter
)
// ***** FIX THIS: enabling this causes complete failure
// ***** FIX THIS: socket disconnects, perhaps after IVL value
// const (
// heartbeatInterval = 15 * time.Second
// heartbeatTimeout = 60 * time.Second
// heartbeatTTL = 120 * time.Second
// )
// routes messages to the correct Submitter
func SubmitQueue() {
go func() {
err := submitForwarder()
logger.PanicIfError("proofProxy", err)
}()
}
// internal submit forwarding loop
func submitForwarder() error {
in, err := zmq.NewSocket(zmq.PULL)
if nil != err {
return err
}
defer in.Close()
in.SetLinger(0)
err = in.Bind(submission)
if nil != err {
return err
}
// route messages to correct submitter
// so packet out of pull _MUST_ have id frame as first item
// other end is DEALER
out, err := zmq.NewSocket(zmq.ROUTER)
if nil != err {
return err
}
defer out.Close()
out.SetLinger(0)
err = out.Bind(subdeal)
if nil != err {
return err
}
// possibly use this: ProxySteerable(frontend, backend, capture, control *Socket) error
// with a control socket for clean shutdown
return zmq.Proxy(in, out, nil)
}
// submitter thread
func Submitter(i int, connectTo string, v6 bool, serverPublicKey []byte, publicKey []byte, privateKey []byte, log *logger.L) error {
log.Info("starting…")
// socket to dequeue submissions
dequeue, err := zmq.NewSocket(zmq.DEALER)
if nil != err {
return err
}
identity := fmt.Sprintf("submitter-%d", i)
dequeue.SetLinger(0)
dequeue.SetIdentity(identity) // set the identity of this thread
err = dequeue.Connect(subdeal)
if nil != err {
dequeue.Close()
return err
}
log.Infof("connect to: %q", connectTo)
rpc, err := zmq.NewSocket(zmq.REQ)
if nil != err {
dequeue.Close()
return err
}
// set encryption
rpc.SetCurveServer(0)
rpc.SetCurvePublickey(string(publicKey))
rpc.SetCurveSecretkey(string(privateKey))
rpc.SetCurveServerkey(string(serverPublicKey))
log.Infof("*client public: %x", publicKey)
log.Tracef("*client private: %x", privateKey)
log.Infof("*server public: %x", serverPublicKey)
// just use public key for identity
rpc.SetIdentity(string(publicKey))
// basic socket options
rpc.SetIpv6(v6)
// keep-alive settings
rpc.SetTcpKeepalive(1)
rpc.SetTcpKeepaliveCnt(5)
rpc.SetTcpKeepaliveIdle(60)
rpc.SetTcpKeepaliveIntvl(60)
// ***** FIX THIS: enabling this causes complete failure
// ***** FIX THIS: socket disconnects, perhaps after IVL value
// heartbeat
// rpc.SetHeartbeatIvl(heartbeatInterval)
// rpc.SetHeartbeatTimeout(heartbeatTimeout)
// rpc.SetHeartbeatTtl(heartbeatTTL)
rpc.Connect(connectTo)
if nil != err {
dequeue.Close()
rpc.Close()
return err
}
// background process
go func() {
defer dequeue.Close()
defer rpc.Close()
dequeue_items:
for {
request, err := dequeue.RecvMessageBytes(0)
logger.PanicIfError("dequeue.RecvMessageBytes", err)
log.Debugf("received data: %x", request)
// safety check
if identity != string(request[0]) {
log.Errorf("received data for wrong submitter: %q expected: %q", request[0], identity)
continue dequeue_items
}
// compose a request for bitmarkd
toSend := struct {
Request string
Job string
Packed []byte
}{
Request: "block.nonce",
Job: string(request[1]),
Packed: request[2],
}
data, err := json.Marshal(toSend)
if nil != err {
log.Errorf("JSON encode error: %s", err)
continue dequeue_items
}
log.Infof("rpc: json to send: %s", data)
_, err = rpc.SendBytes(data, 0)
logger.PanicIfError("rpc send", err)
// server response
response, err := rpc.Recv(0)
logger.PanicIfError("rpc recv", err)
log.Debugf("rpc: received data: %s", response)
var r interface{}
err = json.Unmarshal([]byte(response), &r)
logger.PanicIfError("unmarshal response: error: ", err)
log.Infof("rpc: received from server: %v", r)
}
}()
return nil
}