nimbus-eth1/wrappers/wrapper_whisper_example.go

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package main
import (
"fmt"
"runtime"
"time"
"unsafe"
)
/*
#cgo LDFLAGS: -Wl,-rpath,'$ORIGIN' -L${SRCDIR}/../build -lnimbus -lm
#include "libnimbus.h"
void receiveHandler_cgo(received_message * msg); // Forward declaration.
*/
import "C"
// Arrange that main.main runs on main thread.
func init() {
runtime.LockOSThread()
}
func poll() {
for {
fmt.Println("POLLING")
time.Sleep(1 * time.Microsecond)
C.nimbus_poll()
}
}
//export receiveHandler
func receiveHandler(msg *C.received_message) {
fmt.Printf("[nim-status] received message %s\n",
C.GoStringN((*C.char)(msg.decoded), (C.int)(msg.decodedLen)) )
fmt.Printf("[nim-status] source public key %x\n", msg.source)
}
func Start() {
C.NimMain()
fmt.Println("[nim-status] Start Nimbus")
C.nimbus_start(30306)
}
func StatusListenAndPost(channel string) {
fmt.Println("[nim-status] Status Public ListenAndPost")
// TODO: free the CStrings?
// TODO: Is this doing a copy or not? If not, shouldn't we see issues when the
// nim GC kicks in?
symKeyId := C.GoString(C.nimbus_add_symkey_from_password(C.CString(channel)))
asymKeyId := C.GoString(C.nimbus_new_keypair())
options := C.filter_options{symKeyID: C.CString(symKeyId),
minPow: 0.002,
topic: C.nimbus_string_to_topic(C.CString(channel)).topic}
C.nimbus_subscribe_filter(&options,
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(C.received_msg_handler)(unsafe.Pointer(C.receiveHandler_cgo)))
postMessage := C.post_message{symKeyID: C.CString(symKeyId),
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sourceID: C.CString(asymKeyId),
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ttl: 20,
topic: C.nimbus_string_to_topic(C.CString(channel)).topic,
powTarget: 0.002,
powTime: 1.0}
i := 0
for {
C.nimbus_poll()
t := time.Now().UnixNano() / int64(time.Millisecond)
i = i + 1
time.Sleep(1 * time.Microsecond)
message := fmt.Sprintf("[\"~#c4\",[\"Message:%d\",\"text/plain\",\"~:public-group-user-message\",%d,%d,[\"^ \",\"~:chat-id\",\"%s\",\"~:text\",\"Message:%d\"]]]", i, t*100, t, channel, i)
if i%1000 == 0 {
fmt.Println("[nim-status] posting", message)
postMessage.payload = (C.CString(message))
C.nimbus_post(&postMessage)
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}
}
}
func main() {
nprocs := runtime.GOMAXPROCS(0)
fmt.Println("GOMAXPROCS ", nprocs)
Start()
StatusListenAndPost("status-test-go")
}