Ask LN SERVICE for params

lnurl-grpc-proxy

A rest -> grpc proxy for lnurl withdraw requests

This is meant to be used by clients behind firewalls (Bitcoin Bounty Hunt node e.g.)

lnurl-grpc-proxy --grpc_port 10512 --base_url "http://localhost:10513" --http_host "localhost:10513"

	// WithdrawRequest handles the request comming from the
	// LN WALLET to the LN SERVICE. It returns the Withdraw
	// response as specified in the lnurl rfc.
	func (s Service) WithdrawRequest(id string) (lnurl.LNURLWithdrawResponse, *lnurl.LNURLErrorResponse) {
	// TODO: maybe we should ask the LN SERVICE for the params (max, min withdrawable) in this step.
	s.RLock()

	if withdrawProcess, ok := s.withdrawProcesses[id]; ok {
	s.RUnlock()
	res := &lnurl.LNURLWithdrawResponse{
	Tag: LNURL_WITHDRAWTAG,
	K1: id,
	Callback: fmt.Sprintf("%s/%s", s.baseUrl, DEFAULT_CALLBACK_SUBDIR),
	CallbackURL: nil,
	MaxWithdrawable: withdrawProcess.WithdrawParams.MaxAmt,
	MinWithdrawable: withdrawProcess.WithdrawParams.MinAmt,
	DefaultDescription: withdrawProcess.WithdrawParams.Description,
	}
	log.Printf("\t [LNURL] > New WithdrawRequest %s %v", id, res)
	return res, nil
	}
	s.RUnlock()

	return nil, &lnurl.LNURLErrorResponse{
	Status: "ERROR",
	Reason: WithdrawNotExistError.Error(),
	}
	}