Max Gravitt

https://smartvaults.io

Building on bitcoin and nostr

Public Key

npub1ws2t95pdtpna4ps62rrz75mm6ujsudjv70yj2jk4wsqjhedlw22qsqwew9

NIP-05 Address

_@coinstr.io

Profile Code

nprofile1qqs8g99j6qk4se76scd9p3302daawfgwxex08jf9ft2hgqftuklh99qpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhs98ml00

Publishing to

relay.damus.io

Author Public Key

npub1ws2t95pdtpna4ps62rrz75mm6ujsudjv70yj2jk4wsqjhedlw22qsqwew9

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Last Notes

2023-10-04 13:42:33

Here is a 2-min video that shows how to create a simple miniscript collaborative custody vault using Smart Vaults
https://youtu.be/wSBMlDqrfaQ

2023-08-08 20:23:46

Is there a web nostr client that supports NIP-46 Nostr Connect?

2023-08-02 19:56:46

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Smart vaults npub and video showing creating of a social recovery vault:
https://damus.io/note1pefm8402y0cquk4v8rqcu2td2ah08fdcrtwnejewnuglm6kynq3qncgtne

2023-08-02 18:46:09

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I meant “what do you think?” (Of the name)

2023-08-02 18:45:07

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Yes, and built by the same team. We only recently renamed it to “Smart Vaults” because “Coinstr” was too niche and hard to spell.
Why do you think?

2023-08-02 18:39:52

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The people building it (us) do use nostr. I will create an npub for Smart Vaults specifically. Good call. 👌
We have been building on Nostr for many months now. The signature requests and PSBTs are encrypted and orchestrated over Nostr.
It is open source: https://github.com/coinstr

2023-08-02 15:21:13

Smart vaults is built on the Coinstr protocol (uses nostr to orchestrate spending signature requests). Launching soon- sign up for the waiting list here:
https://smartvaults.io

2023-07-28 13:47:53

With Coinstr, users encrypt an xpub to share with contacts on Nostr, and then they build spending policies with those keys. Collaborative custody powered by Nostr.
https://void.cat/d/HbqepaWWTYzHev2G36LAHy.webp

2023-07-12 18:28:40

Coinstr is soliciting 10-minute market research calls with any business that owns Bitcoin. Just a few simple questions, and we are offering 100,000 sats for your time.
Your input will be used to refine our open source platform for spending policies and signature orchestration over Nostr.
Please re-post for visibility or DM. Thank you nostriches!!

2023-06-24 13:12:12

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Highly recommend hledger or other plaint text accounting tools:
https://hledger.org/

2023-05-11 18:42:04

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Would it make sense to have a standalone site/tool that verified PoR proofs and balances?
If the proof was published as a Nostr note that could be read by the site, or even allow the proof to be pasted in?
Or a Nostr bot that reads them and verifies them.. 🤔

2023-05-11 12:34:49

Coinstr implements this library to allow Proof of Reserves to be generated and validated #note13fn…g69d

2023-04-27 18:58:56

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https://relay.house
Currently set to a 10 sat admission. No traffic yet but running high perf / high availability. Are you testing or launching?

2023-04-27 17:15:51

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Check out Coinstr: https://youtu.be/FyyMz259AZY

2023-04-23 21:53:00

15-min Overview and Demo of Coinstr - Bitcoin Collaborative Custody using Nostr
https://www.youtube.com/watch?v=FyyMz259AZY

2023-04-19 15:03:46

Bitcoin social recovery policy from my Nostr contacts built with Coinstr
https://void.cat/d/6ZvSwoxFeE6nirBXCgbuNu.webp

2023-04-15 11:58:34

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Coinstr enables users to build bitcoin Multisig spending policies (miniscript/Tapscript) with their Nostr contacts, then uses Nostr for orchestrating signature requests on proposals.
Nostr uses the same crypto as bitcoin so every client is also a wallet.
See screenshots of or try the policy builder here: https://coinstr.io/articles/coinstr-app-launch/

2023-04-15 11:13:03

Sneak peek of the Coinstr Native GUI built in Rust/Iced by #[0]
https://nostr.build/i/nostr.build_e6dd84465561e25c4831c6b1a6cf80bbf3b3cd83e59481cda799422d038f6ce2.jpeg

2023-04-15 11:10:37

Build your Bitcoin spending policies from your Nostr contacts. The Coinstr policy builder POC is available at https://coinstr.app.
See the steps here: https://coinstr.io/articles/coinstr-app-launch/

2023-04-11 01:33:27

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I am thinking so. Is it worth it?

2023-03-29 11:37:10

Updated Coinstr deck. MVP is 80% complete. 4 product videos ranging from 90 secs to 30 mins.
https://docs.google.com/presentation/d/16KRZ000a1QoBjEkM_9PIewIdJ3y5yJOlRzKfxa5JXdo

2023-03-26 13:57:26

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4th one

2023-03-24 19:46:04

https://www.youtube.com/watch?v=W-1H_B-YJ1Q

2023-03-24 12:21:49

🚀 Coinstr Launches CLI for Bitcoin Multisig on Nostr
https://coinstr.app/articles/coinstr-cli-launch/

2023-03-23 23:48:46

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We have a tutorial up for the CLI now. GUI is coming soon.
https://ndkit.com/tutorials/coinstr-cli/

2023-03-23 21:40:07

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GUI coming soon

2023-03-23 21:39:26

How to use Coinstr CLI to hold and spend multi-custody Bitcoin with your Nostr friends:
https://ndkit.com/tutorials/coinstr-cli/

2023-03-23 12:27:40

Nostr-Reykjavik 2024 is my vote

2023-03-23 12:22:55

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Great talk, thanks for doing that. 1) Taste, 2) Values, and 3) Ship fast!!

2023-03-23 11:48:25

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What is the context? Is Japan onboarding to Nostr in large numbers?

2023-03-14 12:48:49

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Step by step explainer for how Nostr Connect (NIP-46) works #[0]

2023-03-12 12:07:13

If you had a mortgage at SVB, do you still have to pay it off?

2023-03-11 18:27:03

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Flamingo is not bad. Keeps some history on it.

2023-03-11 14:59:53

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Schnorr 1 of 2
https://user-images.githubusercontent.com/32852271/224491646-3f7b3978-3b80-4f00-80ed-19a82c66914f.png

2023-03-11 14:58:29

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Simpler 3 of 5
https://user-images.githubusercontent.com/32852271/224491561-92a21b01-caf8-41dd-98fe-0acc9f85fd2e.png

2023-03-11 14:52:11

Using the #[0] to save my Tapscript policies on Nostr. Next step is to propose a spend and route for signatures.
https://user-images.githubusercontent.com/32852271/224490986-54c9408b-4a1f-4715-83e2-e7fa827d157b.png

2023-03-11 12:03:30

There must have been thousands of hours of researching Decentralized Identifiers (DIDs) from top down governance models, with near zero results in prod. The classic talking point of “I can prove I’m over 21 without having to reveal my age!” & Verifiable Credentials, etc…
Nostr replaces all of that with a grassroots, bottom up, ethos that will scale faster and more effectively than the W3C could.
We are inflecting into a new age of innovation in both spirit and action. I like it.
Soon we will bury OAuth, “Login with Google”, password managers, and many other skeletons of a bygone era.

2023-03-09 22:39:52

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🙌 freedom of speech and freedom of property together!

2023-03-08 21:37:54

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There were nuances my with my LNBits nginx configuration that I had trouble with. Forwarding headers, etc, TBH I'm not a networking person at all and caddy just made it so much simpler.

2023-03-08 21:34:35

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Or is it already here?
https://ndkit.com

2023-03-08 21:33:35

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It's built on #[5]'s library, the most used Rust library for Nostr. I borrowed the web template from a few projects I admire 😃
https://github.com/NostrDevKit
https://ndkit.com

2023-03-08 11:59:40

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LND. Using caddy instead of nginx for reverse proxy made a big difference for me.

2023-03-07 13:50:44

https://ndkit.com/tutorials/hello-nostr/

2023-03-06 14:04:51

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yikes... I think I will stay on the boat

2023-03-06 11:44:10

Has anyone developed a bot to post Github activity to Nostr?

2023-03-06 11:16:58

PV, and looking forward to seeing nostriches in Uvita next weekend.
Anyone interested in fishing? #[0]

2023-03-06 01:07:22

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Navigating seems wonky on mobile. Will look at that

2023-03-06 01:04:01

Nostr Dev Kit
https://ndkit.com

2023-03-05 22:51:08

This video (from 2011) describes the Decentralized Attribute-based Encryption that we can use for targeting messages (such as BTC bounties as #[0] mentioned) to badge holder criteria.
It DOES require a public setup parameter that is created in a trustless manner.
To safely implement this, we would need to decide to use block data from a specific future Bitcoin block and then we could implement the model AFTER that block has passed, using it for the public setup parameter.
Badge issuers would then be able to issue a key (can be public) to badge holders as part of the issuance process. All badge issuers need to use the same global setup parameter when generating it.
She describes it well: https://www.microsoft.com/en-us/research/video/decentralizing-attribute-based-encryption/

2023-03-05 15:13:58

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The authority needs to generate a key when the badges are assigned IIUC.
Maybe it's possible that it can be derived. I need to research more I think. It also might be simpler than pure ABE because badge holding is boolean vs a specific tier or type of a given badge.
https://github.com/fentec-project/gofe/blob/master/abe/ma-abe.go#L401

2023-03-05 13:49:21

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That is a super cool idea. Earn badges x, y, and z (badges that are invented and authorized by separate independent parties) to earn the bitcoin.
I think we’d need the badge creators to sign the attribute keys but maybe we can add that to badge onboarding.

2023-03-05 04:36:52

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There is also a technique called FROSTR that allows multisignature badge assignment.
E.g. If 3 of 5 specific people agree, person can get rewarded the badge.

2023-03-05 04:31:29

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https://github.com/3yekn/nostr-abe

2023-03-05 04:30:46

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I think it is interesting, especially once we apply something like ABE to message badge holders that meet certain criteria.
https://damus.io/note12jtw6evzsuwtsaw7cdf7fuda8fm7j3p3qrr9quxze9n54zkmf8xq058ks6

2023-03-04 18:14:15

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Also made a video that demonstrates using the rust-nostr reference implementations.
https://youtu.be/dhPV58k9YNY #[0]

2023-03-04 16:31:09

Nostr Connect Technical Deep Dive
#[0] #[1] #[2]
#[3] #[4] #[5]
#[6]
https://coinstr.app/articles/nostr-connect-deep-dive/

2023-03-03 08:28:11

Gm; pv
https://void.cat/d/6SYP4X6v4BWRaqVBu4F8Sg

2023-03-03 08:21:57

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Know-ster is what I use due to descendancy from notes and nus-ter sounds uncomfortable

2023-03-03 08:19:37

Know-ster
Now-ster
Gnaw-ster
Nu-ster
I pronounce it Know-ster because of the descendancy from “notes”
But Nu-ster, as in “other” also seems valid but I don’t like it because it sounds like the name of a rash.

2023-03-02 11:25:53

Good Article on Nostr Badges: https://thebitcoinmanual.com/articles/nostr-badges/

2023-02-28 13:21:18

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ABE will also grant access to badge holders retroactively, for better or worse. They will get to see history. #[2] #[3]

2023-02-28 13:17:35

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Yes, with ways to combine groups with ORs and ANDs. It's like a venn diagram builder for accounts to post to. I'm sure bots will send DMs, but that is a lot of traffic because each DM is a separate event.
With ABE, there is only one event and all the right people can decrypt it. Much less load on relays.
I also think that some programmatic badges could be useful. Things like 'OG from 2023', 'super zapper', or 'relay surfer`. It could get a little creepy with audience targeting, but that'll happen no matter what. #[2]

2023-02-28 12:18:03

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I have used nostore on TestFlight and it works great.
I don't think it is quite the same though. Nostr Connect (nostrum) allows a mobile user to Login and Sign Events constructed in the desktop browser.
It communicates via QR code initially and then Nostr events.
Maybe nostore does this but I've only used it as a mobile Safari extension to hold the key and sign for events on the device.

2023-02-28 12:09:56

NIP-58 is for badges, which is pretty cool. I put together a POC for Multiparty Attribute-based Encryption that could be used to send messages decipherable by accounts that meet certain badge criteria.
Such as: "((shit_poster AND influencer) OR (founder AND honor_badge) OR mega_donor))"
I don't know if it is valuable, but maybe, and the crypto works. Thoughts? I can formalize it with a better reference implementation if seems useful.
CC: #[0] #[1] #[2]
https://github.com/3yekn/nostr-abe

2023-02-28 09:16:02

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The UX is typically terrible for multisignature, but Nostr fixes the underlying signature 'rails' to make it a fully integrated and super safe experience.

2023-02-28 09:15:00

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A simple 3 of 5 looks like this. If any 1 (or even 2) people lose their key, they notify the others and the policy gets reset and the coins moved to the updated policy.
https://void.cat/d/DjwUionbAFNmJWZeqnofeC.webp

2023-02-28 09:12:29

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Coinstr is compatible with hardware wallets.
Nostr Connect may also expand to include hardware or air-gapped signing (QR-code only communications) CC: #[3]
Often key loss can be addressed through the spending policy though. You will have a stash wallet or vault that is 2 of 3 of your own hardware wallets for your big stack. Single sig for your day-to-day, and lightning for shopping and zapping.
If a key becomes compromised, the coins can be swept to a new vault with an updated policy that has the new key. (you technically don't 'reset the key', you 'reset the policy')

2023-02-28 09:02:53

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Yes, precisely.
With really nice dressings for things like Louis can spend from a specific wallet anytime he wants, or Max, Alice, and Bob can spend from it if they all agree, etc. Those are the spending policies that can be authored by users.
https://void.cat/d/47kSfScpsJop8ktD3VG4SG.webp

2023-02-28 08:59:46

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Here are the 3 simple user stories we're building for the MVP.
https://docs.google.com/presentation/d/1l9NV_Wh9RwH5A9NPlg4ZxK14i-aqeNPuc9APJrMs-Lc/edit?usp=sharing

2023-02-28 08:56:12

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Nostr clients are all actually Bitcoin wallets under the covers.
Taproot enables flexible and sophisticated spending policies, or "smart contracts" for multisig rules.
When a CEO or CFO type has a new request to spend money, they can be notified in their DMs and tap-tap-approve.
Super smooth, super safe, and all open protocols.
Here are a few summary slides that visualize it and more detailed info is on the website:
https://docs.google.com/presentation/d/1E4WwSgt4ZKr1M9SmmVELpf2ckhmqC237idLumCKP7Eg/edit#slide=id.p

2023-02-28 08:47:01

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I think the TAM is there but only for bitcoin.
They are going to bury themselves in technical debt shitcoining and building proprietary software.
We are building signature orchestration in the open on Nostr with remote signing using Nostr Connect.

2023-02-28 08:42:46

Fireblocks is valued at $8 billion for basically just a shitcoin multisigature wallet with a remote signer.
Miniscript and Tapscript beat multi-party computation and bitcoin is the only one that matters anyways.
https://void.cat/d/BFXXmcF5x63Jzx6sCFSCHd

2023-02-28 00:48:57

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App:
https://github.com/rust-nostr/nostr/blob/master/crates/nostr-sdk/examples/nostr_connect.rs
Signer:
https://github.com/rust-nostr/nostr-signer
Great work from #[2] - get him some zaps!!

2023-02-27 10:55:36

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Asking for a friend? 😅

2023-02-27 10:54:20

lnbc50n1p3lez7spp5l3yu8rsn5msu0dwzewggpwg7s9337q0e24hdame797du4sqgyx2qdqv23jhxarfdenscqzpgxqrrssrzjqgqq8w2fn2tu3ham4d43jccemvmm48phhn9kq3ml8jr8za05z7vguz7ukcqqxvsqqqqqqqlgqqqqqqgq9qsp5y6nyc36gtz0n8wr9f2p4gskwn4vdneauhsxqc4k42cjrny5k2vvq9qyyssqfasyxsfm4el6qg22utfvqlcjpkxf6tscnw5dmrkqd4yjyj2lx5qzvm5hg0jjvt70jy8fph69s3f5qyxqjt9y5c3epgcjc2e7lld3y6sqz2l0c2

2023-02-26 23:38:00

Shriver 2024

2023-02-26 23:25:52

I want to buy a chicken and a bottle of wine until I’m 89 for fuck’s sake
#[0]

2023-02-26 17:22:14

testing, please ignore

2023-02-25 16:41:34

#[0] #[1] #[2] #[3]
Using Nostr Connect for Safe Signatures
(lmk if something is not accurate)
https://coinstr.app/articles/nostr-connect/

2023-02-25 12:13:12

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#[2] can this compile to WASM?

2023-02-25 12:12:31

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This is awesome👏 . #[2]

2023-02-25 01:03:16

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Sopranos

2023-02-23 01:19:35

https://twitter.com/rsync25/status/1628346728351924225?s=46&t=gF0wbbXdv2gUyGoKDhFWIg

2023-02-23 00:53:32

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Prob support for ordinals in your Coinbase account

2023-02-23 00:52:31

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#[1] 👆

2023-02-23 00:51:48

@jb55 Damus is
https://void.cat/d/GLGjWPqeGMTCwQvuHhndH9

2023-02-23 00:40:26

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And slides!
https://docs.google.com/presentation/d/1E4WwSgt4ZKr1M9SmmVELpf2ckhmqC237idLumCKP7Eg/edit

2023-02-22 03:36:25

https://twitter.com/sehaislam/status/1627800231474495489?s=46&t=ibsT9-O6Y3-9iU4N19SuKg

2023-02-22 03:08:56

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Which client? With the Nostrum app? I went through the test cases in the repo and started porting to rust. The Playground hosted on GitHub doesn’t work for me though.

2023-02-22 02:59:30

Any nostriches going to bitdevs NYC on Thursday?

2023-02-21 10:04:44

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And with longer-form content authoring, we can use legal templating packages like Accord Project. It can be an actual signature replacement for bullshit signature apps like DocuSign.
https://accordproject.org/projects/cicero/

2023-02-21 01:20:44

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Layer 1

2023-02-21 00:29:27

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https://void.cat/d/4R8TQZ7fTE6bnijK2SAbL6

2023-02-21 00:26:23

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Schnorr signature aggregation (and to an extent, Merkalized Abstract Syntax Trees) enable all sorts of collaborative things at scale.

2023-02-21 00:08:10

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A schnorr signature provider in every pocket. Money, speech, auth, and freedom to contract. It’s quite a mashup of functionality while staying decentralized and open.
Add to the list:
1) FROSTR for Multisig speech- https://github.com/nickfarrow/frostr
2) #[4] Nostr-connect: NIP-46 was merged today, which will enable a safer key custody and seamless UX across many apps, https://github.com/nostr-protocol/nips/pull/153

2023-02-20 02:19:38

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I will do some more research tomorrow. I think there is one called “dispute” but I haven’t looked at the code.
I want to work on one that integrates the Nostr Connect protocol with push notifications (I saw you posted on that) for something like “Sign with Nostr”.
Something like what is described here:
https://github.com/nostr-protocol/nips/pull/271

2023-02-19 18:28:59

#[0] #[1] #[2] #[3] #[4] #[5] I am interested to get your thoughts on my NIP for Approval/Signature Requests and Responses using Nostr.
https://github.com/nostr-protocol/nips/pull/271

2023-02-19 10:45:00

https://docs.google.com/presentation/d/1E4WwSgt4ZKr1M9SmmVELpf2ckhmqC237idLumCKP7Eg/edit

2023-02-19 10:37:52

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Working on a NIP & sample impl for signature requests:
https://github.com/3yekn/nips/blob/master/70.md

2023-02-19 04:19:12

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Can you share an excerpt? $70 is a bit steep for me without a preview