From ZmnSCPxj at protonmail.com  Mon Jan  8 06:22:44 2018
From: ZmnSCPxj at protonmail.com (ZmnSCPxj)
Date: Mon, 08 Jan 2018 01:22:44 -0500
Subject: [Lightning-dev] Invoice without amount
In-Reply-To: <CAFDmaN76qiGHqFspZ6R8FN7eEsGCaFBKyFiTMni4sHs7512v0w@mail.gmail.com>
References: <CAFDmaN76qiGHqFspZ6R8FN7eEsGCaFBKyFiTMni4sHs7512v0w@mail.gmail.com>
Message-ID: <G6ytGZcDsaKz_S5gofEQORzYPcgBTthX38ScHfyBnMIt4cdGFiNCZAsL4LdI9xF_F5ZeIyxBL1ZzXfWdBsROfNvYGehoJU_SaFNS92Oca5o=@protonmail.com>

Good morning Cezary,

Currently, c-lightning can PAY amountless invoices via the "pay" command, but cannot CREATE them via the c-lightning "invoice" command.

To pay an amountless invoice lntb... 4 satoshis in c-lightning: lightning-cli pay lntb.. 4000

However the internals of c-lightning should be able to handle creating amountless invoices (it is only the JSON-RPC command itself which requires the amount, but the rest of the code treats it as optional).  I will see what I can do to make creating amountless invoices in c-lightning possible.

Regards,
ZmnSCPxj

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> -------- Original Message --------
> Subject: [Lightning-dev] Invoice without amount
> Local Time: January 6, 2018 10:04 PM
> UTC Time: January 6, 2018 2:04 PM
> From: cezary.dziemian at gmail.com
> To: lightning-dev at lists.linuxfoundation.org
>
> Hello,
>
> It looks "amount" is optional for invoice:
>
> https://github.com/lightningnetwork/lightning-rfc/blob/master/11-payment-encoding.md
>
> The issue is I cannot generate such invoice using lnd. This is very important for what we are tryiong to do with LN. Can you confirm, that value will be optional for LN invoice.
>
> Or at least, thet there is some other way to send payment when sender specifies amount.
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