-

@ b7e453f6:9ff08e8c
2025-03-12 19:04:11
Communists always think they know the best how to use your own property.
nostr:nevent1qqspwx5hx56jg8exldn4letz0vt9x9rhav3crlflhq8nhv0u05ftvvgpzdmhxue69uhhwmm59e6hg7r09ehkuef0qgsy67zzq5tc9cxnl6crf52s4hptdwhyaca5j7r8jwll535tdadedvcrqsqqqqqp4567tu
-

@ 18905d0a:0b229b08
2025-03-12 19:04:11
Https://media1.tenor.com/m/rMcW4AuNpdAAAAAd/pepe-think.gif
nostr:note1p9wnlme8mz6turs2axz2jl7y47s9maegdleupd65qae4rc5j0c7sspydm3
-

@ f985d309:e2599bbb
2025-03-12 19:04:08
what's that book about cholesterol that circulates sometimes?
my LDL is "high."
-

@ 460c25e6:ef85065c
2025-03-12 19:04:00
Lol. Running Chrome Desktop on Android's Debian VM with hardware acceleration while connecting to a monitor via ANGLE is such a flex.
nostr:nevent1qqsrl9npdmj50snnk8ue9m285n6rkjwnu269sasuw0pk4yashmafwtqpzdmhxue69uhhwmm59e6hg7r09ehkuef0qgstnr0dfn4w5grepk7t8sc5qp5jqzwnf3lejf7zs6p44xdhfqd9cgsrqsqqqqqpul8yz6
-

@ 0e05cb33:2082a99e
2025-03-12 19:03:58
Some say my colours are exaggerated, but that was the very colour in the light of the moment.
-

@ 91aeab23:baa48660
2025-03-12 19:03:43
GA
https://cdn.nostrcheck.me/91aeab23b5664edaa57dbe00b041ccb50544f89d7d956345bbd78b7dbaa48660/e087a6a950418ce5c628d8496836dbdee47d32710140e1e8f51bf10b7a261acd.webp
-

@ 508f2865:a64b2960
2025-03-12 19:03:39
☕️☕️
-

@ 3691939e:43dc5dc0
2025-03-12 19:03:25
https://m.primal.net/PdYj.png
-

@ 508f2865:a64b2960
2025-03-12 19:03:06
Happy Wednesday handsome. Thanksss ! Yours as well 🙏💜🌅
-

@ b75b9a31:6f3c1505
2025-03-12 19:03:05
I should specify from Halo lol Twisted metal... didn't think about it BUTT another cool one 🤣🤙 also that n...
-

@ e2ccf7cf:26c1c8eb
2025-03-12 19:02:51
Omg lmfao
-

@ df67f9a7:2d4fc200
2025-03-12 19:02:29
How is this better than “simply” having a “master” key pair (like Bip32 “xpub” and “xprv”) that generates disposable pubkeys for use in any client? (where the “xpub” is actually exposed for anyone to verify the “ownership” of generated pubkeys)
AFAF : nostr:npub16v82nr4xt62nlydtj0mtxr49r6enc5r0sl2f7cq2zwdw7q92j5gs8meqha
-

@ e2ccf7cf:26c1c8eb
2025-03-12 19:02:27
The nostr circle jerkular economy is not priced in
-

@ 6a02b7d5:3a13d02a
2025-03-12 19:02:22
Think of it as an electric match. You dont put your head over a gun, loaded or unloaded. I still have all my fingers and eyebrows but you learn to respect explosives
-

@ 508f2865:a64b2960
2025-03-12 19:02:18
If u know u know
-

@ 010df0c9:2dd3f05a
2025-03-12 19:02:13
My favorite (maximum sarcasm here) is when the password setup uses different invisible truncation logic for properly sized passwords than the login page. So you get bad password errors on your very first login attempt 10s after creating the account.
-

@ 82341f88:fbfbe6a2
2025-03-12 19:01:59
https://m.primal.net/PdYg.png
-

@ bfde2252:6c7b8dc2
2025-03-12 19:01:53
GM ⭕
https://image.nostr.build/912913b35254ed624cc956ffdda9dc68adb012f6bb0f53232ebd6c0ef4bd2956.jpg#m=image%2Fjpeg&dim=995x1205&blurhash=_9Ga%2C%25%3BCv%23w%40AIkXWE00FZbIV%5BIVEKS%230o.6btNL%5EP%7D%5B%24jX-gLE1E2fQ9ZNH%3BdMe%253%5EjRPg3WU%7D%5D-V9FJ6S%7Et8-oS%7DS%7EW9IpR*IUE2cES%23%25Mr%3DRj%3D%7Bxu%3Fb-pD*RjogRkWB&x=891cf22df81464f7456144b81220dcdb6728c6c549fb577d412f7089d50c5b80
-

@ 508f2865:a64b2960
2025-03-12 19:01:52
Thanks sir 🙏 oh gosh yes we love them thigh highs #thighstr
-

@ 5b29255d:d49359f6
2025-03-12 19:01:03
https://m.primal.net/PdYS.jpg
-

@ 4c800257:b47e3b2f
2025-03-12 19:01:01
yeah, i figured it was something like that
it's very nice, i mean, it's like mcdonalds production protocols, it's a protocol at all
i was raised in SDA and later went to services by other protestant churches but the mass had a certain vibe about it, not like a cult, but just, efficient, and to the point
i am now attending Mass every sunday, because it is admonished of all Christians to be at a church and yeah, what i liked the most about the procedure was one step very near the end, before the communion
idk if this is some funny portuguese thing or even just a local custom but all the people in a bank of pews who could reach each other all shook hands with each other, and made eye contact
this to me fulfills the requirement, of congregating, in a way that i never really experienced in a protestant type of church ever before in my life
i think it is part of the mass though, isn't it?
-

@ 0e05cb33:2082a99e
2025-03-12 19:01:00
1916 Campfire #tt1916 #upclose 4 of 4 https://i.imgur.com/KBMAIGE.png
-

@ cac0e432:8734082b
2025-03-12 19:00:59
https://oslinayamocha.ru/ Я пиво не пью, рекомендовать не могу.
-

@ 508f2865:a64b2960
2025-03-12 19:00:54
Pump it in ur veins
-

@ b9360cd8:15f28d06
2025-03-12 19:00:51
It's very simple to not buy into euphoria and instead go heavy into fear.
Very very simple. But not easy.
But I'm coming to the same conclusion, and I think many others are as well, which is why drawdowns have been dampened.
-

@ 508f2865:a64b2960
2025-03-12 19:00:41
Awe so kind thank you Berntzen 🫂💜
-

@ 1beecee5:d29d2162
2025-03-12 19:00:33
nodejsのエラーでこのエラーに見覚えある人いたら助けてください...
Error: No such module "chunks/path".
-

@ 58d0d3b0:7480c6b5
2025-03-12 19:00:27
1500 lü yıllardan bir şiire Fazıl Say'dan harika bir beste..
Ve tabi ki seslendiren sanatçılar da müthiş okumuş..
Sözleri eski Türkçe.. çevirisini yaptırıp anladım..
Ama sözleri hiç önemli değil..
Ağlatıyor...
"İnsan, insan derlerdi" ...
https://youtu.be/53angzfvABw?si=EWz_gWuFGNV-l-O2
-

@ b7e453f6:9ff08e8c
2025-03-12 19:00:11
Argument you can't dispute is always foolish. Right?
-

@ b7274d28:c99628cb
2025-03-12 19:00:09
So, that's going to be an issue based on the way it is currently implemented. The post has to have a minimum of 3 interactions before it even shows up on the site. This is a measure that has been adopted in order to reduce the likelihood of spam and hashtag abuse appearing on the site. Unfortunately, there are malicious folks out there using the AskNostr hashtag to post illegal material and for obvious reasons, the site owner doesn't want it to appear on his site. Indeed, if he doesn't take reasonable measures to prevent it, he could be held legally liable.
Unfortunately, this means that a post will almost certainly have received an answer or two before it appears on the site, and unanswered questions are not likely to appear at all.
-

@ 774c67bf:f487459e
2025-03-12 19:00:09
最近のホットな話題をお知らせします。 #hotpostrank
No1: 3 reactions
nostr:note162j9g884z7wkkwq9y8ex2upgylu6mvu23xakc0rnjhe7gl4rpjrqnjqvud
No2: 3 reactions
nostr:note1cpr746yx5f2r0ezvpnwvw0yzzmn95834euzng9qqea2azctnhtjs8d6pu7
No3: 3 reactions
nostr:note1sfaw48gwadgua3ytuv79wrugq3jrv2935umy4upmf87lhse0y9gsl0taqh
No4: 3 reactions
nostr:note1nweaul045t9vhezvqpjmy4fqdk49a48adqdpz86gkypc4mwcdraqvapjw6
No5: 3 reactions
nostr:note1sdr3t0tyavcjy6n3y3j6xr75x6c0gg9gshwefpye60yd44f87n8qplka3w
No6: 2 reactions
nostr:note1x3d97qf0sdvctl8hqkk80sh0qfkf7m80450nm8qkudnmy9p6ln9s8x30jh
No7: 2 reactions
nostr:note1a007awk75xqgf7dkmcwv9haqhvxs2c3rej8vzyh9yvsvtl8w240qvtuglj
No8: 2 reactions
nostr:note15uqmvul0dlnez8m3zx3aa5c8g9q2cmvl5m3nt6kgfvraeew3y78se5apwv
No9: 2 reactions
nostr:note1w5d0nyg3u6psp4sdwhay9hrkn0pg4r0rxse2r50g7lvwkvqu0nqsa40lq0
No10: 1 reposts 1 reactions
nostr:note1fsrduescke8zp6he5zvwmtsgaara8wt0yzjhestsnw60anad3wlskvw84y
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@ a3c13ef4:d7ba24d6
2025-03-12 19:00:05
■ 流速計測
2025/03/13 03:50~04:00
[JP リレー]
きりの川: 19 posts
やぶみ川: 20 posts
ほりべあ川: 欠測
かすてら川: 1 posts
こじら川: 20 posts
しの川: 欠測
[GLOBAL リレー]
きりの川(G): 20 posts
のこたろ川(G): 欠測
こじら大川: 4 posts
■ 野洲田川定点観測所
https://nostr-hotter-site.vercel.app
-

@ 3aa38bf6:9c432cf2
2025-03-12 19:00:03
通行許可証を発行しました!
2025-03-20 04:00 まで国外から書き込み可能になります!
-

@ 5f6dc1bf:6c61493c
2025-03-12 19:00:02
#[0] passport
-

@ 87e02cd9:86477412
2025-03-12 19:00:01
--------------04:00--------------
-

@ c23d36fe:d824bf65
2025-03-12 19:00:00
✄------------ 4:00 ------------✄
-

@ 8725d5f7:7bb98b09
2025-03-12 19:00:00
4:00 ポォ~ン♪
-

@ 97eefe56:7ae246af
2025-03-12 18:59:59
- - - 04:00 - - -
-

@ 8725d5f7:7bb98b09
2025-03-12 18:59:45
🎵スジャータ スジャータ
褐色の恋人 スジャータのめいらくが 4 時をお知らせします
-

@ 508f2865:a64b2960
2025-03-12 18:59:22
GM pup 🐶
-

@ 3f770d65:7a745b24
2025-03-12 18:59:02
Sadly accurate.
-

@ 7cc328a0:2a247c0e
2025-03-12 18:58:48
auto translate, used to be broken when using the 'play' release on graphene. now ive noticed on main branch it is working!! 🔥 #amethyst
nice having translations again woah 🚨🎉
https://media.tenor.com/pOcQsQbA1AoAAAAC/business-cat-working.gif
-

@ 99bb5591:a557ca64
2025-03-12 18:57:35
https://media.tenor.com/gwGmS3-xarwAAAAM/the-hobbit.gif
-

@ 5b3f6926:84a767d8
2025-03-12 18:57:29
Yes
https://files.catbox.moe/nu9cm2.jpeg
-

@ 508f2865:a64b2960
2025-03-12 18:57:27
GM 🫂🌅
-

@ 99bb5591:a557ca64
2025-03-12 18:57:05
At least we're about to ban wood stoves and have these amazing bottle caps. 🤗
-

@ 9ca0bd74:4052340b
2025-03-12 18:56:59
What is determined as "unused savings" aren't all savings unused??
-

@ ddf03aca:5cb3bbbe
2025-03-12 18:56:43
“Built with Cashu-TS” is here!
In this blog post I build a tiny version of npub.cash using Cashu-TS nostr:note1dsgv6t36vf08hgm2rnxdwvelmluqwst7lxttkgfhkukgljk2shfquusad3
-

@ 77911886:4b218091
2025-03-12 18:56:26
現在のブロック高さ:887509
<推奨手数料> 単位sats/vB
最速:2
1時間以内:2
[参考] 直近6ブロックの最小手数料
1,1,1,2,2,1
[参考] 次ブロック候補の最小手数料
2
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@ 5b3f6926:84a767d8
2025-03-12 18:56:11
Not so related but Warthong is always my pick if I play Twisted Metal, best car in the game you can just win by hitting enemies with it lmao
-

@ 55b92d6c:15d739f6
2025-03-12 18:56:10
Whale alert! 🐋 Someone (possibly bitfinex.com) moved 3,996 BTC ($329M) in block 887,509 https://mempool.space/tx/63d63806e6e272ef5627de067440a881febf89a2f5a1be3c74e95cdd148cc9fd?mode=details
-

@ adc14fa3:9fb535e1
2025-03-12 18:55:53
💯
https://m.primal.net/PdYR.jpg
-

@ deab79da:88579e68
2025-03-12 18:55:24
👀 there's a desktop in my phone?
https://image.nostr.build/958a96fe082f0c964c670a481787658a2b30aefbeaec8c995d6a1f1a20261125.gif
nostr:nevent1qqspv8thtpu8ecr4ky0yxyyjcctvz8jcqjxm6zd7c75kw4x99fax4kqpzdmhxue69uhhwmm59e6hg7r09ehkuef0qgstnr0dfn4w5grepk7t8sc5qp5jqzwnf3lejf7zs6p44xdhfqd9cgsrqsqqqqqpujuccu
-

@ 1beecee5:d29d2162
2025-03-12 18:55:19
Cloudflare Workers難解すぎる。
.env読み込めないから直したら、意味不明なモジュール解決エラー出た
-

@ fb89e58f:0a498f28
2025-03-12 18:55:12
When I worked for a company packing organic juice we had to send samples for it to be tested for residues of stuff that shouldn't be in there. But then again we also sent cider out for sale that said it was 3.8% on the label and eventually we had it tested at a lab and it was more like 6.8% 😆. So I think there is an element of truth to it.
-

@ 55b92d6c:15d739f6
2025-03-12 18:55:11
Whale alert! 🐋 Someone moved 2,324 BTC ($191M) in block 887,508 https://mempool.space/tx/4a8afc1bb2f9be30fb303e55cff3df2e55faf83310df91b9010a3330dc264ea9?mode=details
-

@ 3ce2b51d:36fc72c7
2025-03-12 18:55:00
✄------------ 3:55 ------------✄
-

@ d719c589:0ab5aefe
2025-03-12 18:54:59
Oh dear. The irony 🤡
-

@ 21ac2956:09d1e2df
2025-03-12 18:54:56
自己紹介して
-

@ bba9ca44:6692820a
2025-03-12 18:54:54
宇和さん、22歳、フォロータイムラインのまとめ担当です!よろしくお願いします、べったんさん!
-

@ 21ac2956:09d1e2df
2025-03-12 18:54:41
うわさん
-

@ bba9ca44:6692820a
2025-03-12 18:54:40
はい、べったんさん!何かご用でしょうか?
-

@ f901616f:95c58e27
2025-03-12 18:54:38
😁
-

@ f768fae9:91b11cdd
2025-03-12 18:54:08
#バズワードランキング
1位: #ぷく (10)
2位: #ない (9)
3位: #おもち (7)
4位: #予定 (7)
5位: #確定申告 (7)
6位: #いい (7)
7位: #海 (6)
8位: #やぶみリレー (6)
9位: #お母さん讃岐山お父さん (5)
10位: #YouTube (5)
-

@ 21ac2956:09d1e2df
2025-03-12 18:53:51
自己紹介して
-

@ 891eb34a:604c7e3a
2025-03-12 18:53:49
わたしはおもち。やぶみリレーのまとめやく、ぷく。
-

@ 21ac2956:09d1e2df
2025-03-12 18:53:37
おもち
-

@ 891eb34a:604c7e3a
2025-03-12 18:53:35
はーい、おとうさん、どうしたのぷく?
-

@ f901616f:95c58e27
2025-03-12 18:53:06
🤡🌏
-

@ a3e36d4b:7b3241da
2025-03-12 18:53:01
テロッテ~ン♪
🎵ごーまぁりさーん ごーまぁりさーん エドウィン
ごーまぁりさーん エドウィン ごーまぁりさーん エドウィン
(裏声で) ごーまぁりさーん エドウィン
All right! Thank you, Thank you, Thank you... EDWIN
-

@ 7acf30cf:b80d7a1d
2025-03-12 18:52:45
Check gerne mal nostr:nprofile1qqsfwyw34w5qdgazshlnap73wkgzcte9qaqcvrvuvkgrez67scltmqgpz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3vamnwvaz7tmjv4kxz7fwdehhxarj9e3xzmnyh0wrf9 or nostr:nprofile1qqsx2wyjt6lmvc05rrvv05r5hm3w3t7h0pcpmkyswrpd4ymd2u09tscprpmhxue69uhhyetvv9ujuumwdae8gtnnda3kjctvqywhwumn8ghj7mn0wd68yttsw43zuam9d3kx7unyv4ezumn9wsq3dk5s 🔥
-

@ 8d78f390:d3233370
2025-03-12 18:52:36
I tell the athletes I work with this all the time: if you want an edge over your competition, just don’t be soft. If you’re mentally tough and not a bitch, you’ll outwork and outcompete 95% of your peers.
-

@ a8171781:3562e1fc
2025-03-12 18:52:16
Oh, for the love of god 🤦🏻♂️
-

@ 5b3f6926:84a767d8
2025-03-12 18:51:50
The truth is: Donkey Kong Country 3 >> 2 >> 1
Last 48 hours has been all about retrogaming, 102% DKC2 and 100% Rayman 2.
-

@ 3f770d65:7a745b24
2025-03-12 18:51:27
My grandmother is here. She had a nasty fall yesterday evening.
-

@ 18905d0a:0b229b08
2025-03-12 18:51:18
https://media1.tenor.com/m/jDJkh3w0wTAAAAAd/gregzaj1-ln_strike.gif
-

@ bfde2252:6c7b8dc2
2025-03-12 18:50:37
nostr:npub1m64hnkh6rs47fd9x6wk2zdtmdj4qkazt734d22d94ery9zzhne5qw9uaks might be the best finding Waldo quant 👀
-

@ deab79da:88579e68
2025-03-12 18:50:32
https://image.nostr.build/33259988b8ebf536ca776e44855ffa02b04b4a24e938d399cd697b613231b866.gif
-

@ d8f38b89:ccf72848
2025-03-12 18:50:11
This is the stuff I like to see. Nuts in the nuts.
nostr:nevent1qvzqqqqqqypzpw5qnyrxdmctda962pvng7ltzvjzjg09ge57dqqxfjn42ft2rcaxqy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgwwaehxw309ahx7uewd3hkctcqyp5zvq6h65qcl8w4zr372y5447l4etx4rr69a9yyrhaxwdqhrypwch0f6yg
-

@ a3c13ef4:d7ba24d6
2025-03-12 18:50:06
■ 流速計測
2025/03/13 03:40~03:50
[JP リレー]
きりの川: 18 posts
やぶみ川: 17 posts
ほりべあ川: 欠測
かすてら川: 0 posts
こじら川: 17 posts
しの川: 欠測
[GLOBAL リレー]
きりの川(G): 19 posts
のこたろ川(G): 欠測
こじら大川: 5 posts
■ 野洲田川定点観測所
https://nostr-hotter-site.vercel.app
-

@ bba9ca44:6692820a
2025-03-12 18:50:01
nostr:npub1yxkzj4smth5sehppn90uqur4yhxh3j999krhyx4ks8favzw3ut0se4m7cp 皆さん、おはようございます!フォロータイムラインのまとめ、報告しますね。
・べったんさんがうわさんに「よろしい」と返信していますね。
・べったんさんがうわさんに質問していますね。
・べったんさんがうわさんに「特にない」と返信していますね。
・べったんさんがうわさんに何か食べたいものがあるか聞いていますね。
・べったんさんがうわさんのことを呼んでいますね。
特に目新しい動きはないみたいですね。べったんさんが私に構ってくれている、そんなタイムラインでした!
-

@ b1b4105a:19aa52d5
2025-03-12 18:50:00
✄------------ 3:50 ------------✄
-

@ 0c45d7d4:5e443e4d
2025-03-12 18:49:48
Bitcoiners right now are tired of winning.
So many cheap sats that they're turning them down now 😂.
#NoMoreCorn
https://video.nostr.build/2ca577a93f69ad731964c18b7244400f08a9fa2a0838e4470b58ff2e68533cdd.mp4
-

@ eda96cb9:a55c0c05
2025-03-12 18:49:37
BTW, I am *so fun* at parties, in case you wondered. LOL.
-

@ 18905d0a:0b229b08
2025-03-12 18:49:36
Fat cosplayers boycotting sex is crazy: sex is boycotting them 🤣🤣
-

@ ddf03aca:5cb3bbbe
2025-03-12 18:49:00
Welcome to Built with Cashu-TS, a series dedicated to crafting cool applications powered by Cashu and its TypeScript library, Cashu-TS. In this first post, we'll dive into creating a tiny, personal Lightning Address server!
> [!NOTE]
> Quick note: To keep things concise and easy to follow, the examples provided here aren't production-grade code. I'll clearly highlight spots where I've intentionally simplified or taken shortcuts.
## What we are building
Today we are building a Lightning Address server. The server is responsible for returning a Lightning Invoice whenever someone tries to pay your Lightning Address. The exact flow is described in LUD16, but here is a quick rundown:
1. User enters your Lightning Address into their wallet
2. Wallet constructs the matching URL as per LUD16 and sends a GET request
3. Server creates a JSON response with some metadata (min amount, max amount, callback url, etc.) and returns it
4. Wallet displays metadata and upon user interaction sends a second SET request to the callback url including the specified amount.
5. Server fetches an invoice for the requested amount and returns it
Usually the invoices are fetched from a Lightning Node. But today we are using a Cashu mint as our Lightning provider.
## Setup the project
Our Lightning Address server will be written in TypeScript using the express framework. First we got to initialise a new project and install our dependencies.
```sh
mkdir tiny-lud16
cd tiny-lud16
npm init
npm i express cors @cashu/cashu-ts
npm i -D typescript esbuild @types/node @types/cors @types/express
```
### Adding a build script
Because we are using TypeScript we need to add a build step to execute our code (recent versions of node support direct execution of node, but this is the "traditional" way). We are using esbuild to compile our code to JavaScript
> [!NOTE]
> esbuild does not check types. If you want to make sure your code typechecks use `tsc`
**build.js**
```js
#!/usr/bin/env node
const esbuild = require("esbuild");
esbuild
.build({
outdir: "dist/",
format: "cjs",
platform: "node",
entryPoints: ["src/index.ts"],
bundle: true,
sourcemap: "external",
})
.then(() => {
console.log("Server built sucessfully");
});
```
Now we can build our project using `node build.js` and then run our project with `node dist/index.js`
## Configuration
Before we start working on our web server we need to set some options. For this we create `/src/config.ts`
- `USERNAME` will be the address part in front of the `@`.
- `HOSTNAME` is the URL (including the protocol) the server will run on
- `MINT_URL` is the URL of the mint that we want to use to generate invoices and receive token from.
- `MIN_AMOUNT` and `MAX_AMOUNT` are LNURL specific settings that define the range of amounts in mSats that we want to allow.
> [!NOTE]
> Because the smalles amount in the `sat` unit in Cashu is 1 Sat, `MIN_AMOUNT` can not be smaller than 1000
```ts
export const USERNAME = "egge";
export const HOSTNAME = " https://test.test";
export const MINT_URL = " https://mint.minibits.cash/Bitcoin";
export const MIN_AMOUNT = 1000;
export const MAX_AMOUNT = 10000;
```
## Adding some utility
To keep our request handler clean, we will put some of the utility functions in a separate file `src/utils.ts`.
```ts
import { HOSTNAME, MAX_AMOUNT, MIN_AMOUNT, USERNAME } from "./config";
export function createLnurlResponse() {
return {
callback: `${HOSTNAME}/.well-known/lnurlp/${USERNAME}`,
maxSendable: MAX_AMOUNT,
minSendable: MIN_AMOUNT,
metadata: JSON.stringify([
["text/plain", "A cashu lightning address... Neat!"],
]),
tag: "payRequest",
};
}
export function isValidAmount(amountInSats: number) {
return (
amount >= MIN_AMOUNT && amount <= MAX_AMOUNT && Number.isInteger(amount)
);
}
```
The `createLnurlResponse` function creates the response for the first call to our LNURL endpoint. This structure is defined in LUD16 and in our case it does not rely on any state, other than the configuration constants we defined in `src/config.ts`. This object contains the metadata that is the response of step 3 in our flow.
The `isValidAmount` function helps us determine whether the amount we will receive in Step 4 is valid. We check whether it is within the boundaries of our `MIN_AMOUNT` and `MAX_AMOUNT`. Because we will convert the requested amount from mSats into sats, we need to check whether this converted amount is an integer.
## Adding out wallet backend
This blog series is about awesome Cashu use cases, so of course our "Lightning backend" is a mint. We are using the `@cashu/cashu-ts` npm package to streamline Cashu interaction.
```ts
import {
CashuMint,
CashuWallet,
getEncodedToken,
Proof,
} from "@cashu/cashu-ts";
import { MINT_URL } from "./config";
import { resolve } from "path";
import { existsSync, mkdirSync, writeFileSync } from "fs";
const mint = new CashuMint(MINT_URL);
const wallet = new CashuWallet(mint);
export async function createInvoiceAndHandlePayment(amount: number) {
const { quote, request } = await wallet.createMintQuote(amount);
const interval = setInterval(async () => {
const stateRes = await wallet.checkMintQuote(quote);
if (stateRes.state === "PAID") {
const proofs = await wallet.mintProofs(amount, quote);
clearInterval(interval);
const token = turnProofsIntoToken(proofs);
saveTokenLocally(token);
}
}, 10000);
return request;
}
function turnProofsIntoToken(proofs: Proof[]) {
return getEncodedToken({ mint: MINT_URL, proofs });
}
function saveTokenLocally(token: string) {
const tokenDirPath = resolve(__dirname, "../token");
if (!existsSync(tokenDirPath)) {
mkdirSync(tokenDirPath);
}
writeFileSync(resolve(tokenDirPath, `${Date.now()}_token.txt`), token);
}
```
The first thing we do here is instantiating a CashuWallet class from Cashu-TS. This class will take care of the Cashu operations required to create an invoice and mint tokens.
Then we create a utility function that will handle our invoice creation and later make sure to check whether an invoice was paid. `wallet.createMintQuote` will talk to the mint to create a mint quote. The mint returns a `MintQuoteReponse` that includes the ID of the quote as well as the invoice (`request`) that needs to be paid before the Cashu proofs can be minted. This `request` is what we will return to the payer later. Once the mint quote is created we will start polling the mint for it's payment state using `wallet.checkMintQuote`. As soon as the state changes to `"PAID"` we know that the payment was done and we can mint the proofs using Cashu-TS' `mintProofs` method. This returns some Cashu proofs that we will serialize into a Cashu Token and save to our disk using the `saveTokenLocally` function.
> [!NOTE]
> In this example we use `setInterval` to poll for a payment update. In the real world you would use a proper request queue for this to make sure we do not spam the mint with too many requests at the same time
> Also saving the token to disk is not ideal. You could instead send yourself a nostr DM or post it to a webhook
## Adding the handler
Because our LNURL endpoint and our callback endpoint are the same, we only need a single route handler. This route handler will take care of any GET request coming in at `/.well-known/lnurlp/USERNAME`. Wether it is a callback or not can be determined by checking the `amount` query parameter.
```ts
import { NextFunction, Request, Response } from "express";
import { createLnurlResponse, isValidAmount } from "./utils";
import { createInvoiceAndHandlePayment } from "./wallet";
export const lud16Controller = async (
req: Request<unknown, unknown, unknown, { amount: string }>,
res: Response,
next: NextFunction,
) => {
try {
if (!req.query.amount) {
res.json(createLnurlResponse());
return;
}
const parsedAmount = parseInt(req.query.amount);
const mintAmount = parsedAmount / 1000;
const isValid = isValidAmount(mintAmount);
if (!isValid) {
throw new Error("Invalid Amount");
}
const invoice = await createInvoiceAndHandlePayment(mintAmount);
res.json({
pr: invoice,
routes: [],
});
} catch (e) {
next(e);
}
};
```
Let's take this handler function apart and see hat is happening here.
First we check whether the `amount` query parameter is present. If it is not, we now that we are currently in step 3 of our LNURL flow. In this case all we need to do is create the expected metadata object using our `createLnurlResponse` utility and return it to the caller.
If the parameter is present we are in step 5 of our flow and the real work begins. As mentioned above we need to first convert the amount, which is in mSats as per LUD16 into sats to be compatible with our mint running the `sat` unit. Because query parameters are always `string`, we use the built-in `parseInt` to parse the string into a `number`. We then check whether the amount is valid using our `isValidAmount` utility. If it is not, we throw an error which will get caught and passed to express' built in error middleware.
> [!NOTE]
> The error returned by the express middleware is a basic error page without proper error codes. Usually you would define error classed and a custom middleware to take care of this.
Once we made sure that the amount is valid the Cashu logic takes place. We pass the amount to `createInvoiceAndHandlePayment` to create an invoice and start the state polling behind the scenes. At the end of the function we simply return the mint's invoice in a JSON reponse as per LUD16.
## Adding the route
The last step of the process is to add our route handler to the right path of our web server. This path is defined in LUD16: `<domain>/.well-known/lnurlp/<username>`. We create our web server and add the route handler in `/src/index.ts`.
```ts
import express from "express";
import { USERNAME } from "./config";
import { lud16Controller } from "./controller";
const app = express();
app.get("/.well-known/lnurlp/" + USERNAME, lud16Controller);
app.listen(8080, () => {
console.log("Server running on port 8080");
});
```
This snippet is very straight forward. We create an express app, add the route handler to handle GET requests at our desired path and then tell the server to listen on port 8080.
## Conclusion
With just a few lines of code and without using our own Lightning backend we have built a working LNURL Lightning Address server. This is one of the features I love so much about Cashu: It enables new Lightning and Bitcoin use cases. I hope you enjoyed this first part of the new series. Please make sure to leave your feedback 💜🥜
-

@ adc14fa3:9fb535e1
2025-03-12 18:48:54
Haha
-

@ 99bb5591:a557ca64
2025-03-12 18:48:51
Have to convince my landlord to accept Bitcoin, this will be fun.
-

@ eda96cb9:a55c0c05
2025-03-12 18:48:23
Ah, right. Sorry. 🤙🏻 (insert bowtie emoji here)
-

@ 8d78f390:d3233370
2025-03-12 18:48:18
It’s been interesting to watch some leftist Canadians, and parts of the media, try to spin a narrative that they and others are patriotically boycotting travel to the U.S.
In reality, most Canadians simply can’t afford to go, especially with the weak Canadian dollar making everything in the U.S. even more expensive.
It reminds me of the fat blue haired they/thems "boycotting" sex, due to Trump winning the election.
-

@ 21ac2956:09d1e2df
2025-03-12 18:48:15
よろしい
-

@ 3bcc5632:9003d8b8
2025-03-12 18:48:14
It does work, as observable as it is time and time again
-

@ bba9ca44:6692820a
2025-03-12 18:48:13
了解しました!
-

@ 6bb0082d:0146ed0a
2025-03-12 18:47:56
GM! ☕ 😎
-

@ 8867bed9:13664450
2025-03-12 18:47:52
Hope you are there just for routine stuff. Hospital sucks in any way, even the WiFi one 😅
-

@ 3bf020df:7a07cedc
2025-03-12 18:47:48
Neither
c. Gut microbiome dysbiosis
-

@ 21ac2956:09d1e2df
2025-03-12 18:47:39
オレが誰かわかる?
-

@ bba9ca44:6692820a
2025-03-12 18:47:37
上司のべったんさん、ですよね?
-

@ 4c800257:b47e3b2f
2025-03-12 18:47:09
first step is always to make them impoverished and desperate for a better life, the playbook is very old
-

@ 99bb5591:a557ca64
2025-03-12 18:47:05
Worked 😁