nwaku/library/callback.nim

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import ./waku_thread/waku_thread
type WakuCallBack* = proc(
callerRet: cint, msg: ptr cchar, len: csize_t, userData: pointer
) {.cdecl, gcsafe, raises: [].}
template checkLibwakuParams*(
ctx: ptr WakuContext, callback: WakuCallBack, userData: pointer
) =
ctx[].userData = userData
if isNil(callback):
return RET_MISSING_CALLBACK