Questions tagged [multi-signature]

Multi-signature addresses require m-of-n signatures to authorize spending funds sent to them.

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Create a 2-3 multisig address without syncing entire blockchain

I have a hardware wallet, a seed, and a specific private key. I want to create a 2-of-3 multisig using these 3 items. So the only option left is the option of creating a multisig using just private ...
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how to test decryption of shared seed for a multisig vault

I used the script from this post How to derive the private key associated with a Coinbase multi-sig vault address To get the Master Private Key, Extended Private key at index 14, and WIF format of ...
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1answer
56 views

Support for taproot multisig descriptors

I’m trying to understand the current state of descriptor support for taproot, with a specific focus on multisig wallets (When I say “multisig” I mean k-of-n threshold signing, rather than a schnorr ...
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I have lost 1 of my 2 of 3 multisig seeds. How do I restore to make a transaction?

I come to you a little bit desperate, hoping for a clue to move forward. Long ago, I created 3 seed phrases, and then made a 2 of 3 multisig wallet with these 3. I did all of this using Cold Cards For ...
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1answer
28 views

Extracting forkcoins from legacy multisig Copay wallet

In 2017, we made an m-out-of-n multisignature wallet in the Copay app. After this time, several forks have arisen. Bitpay, the successor of Copay, does have built in support for Bitcoin Cash (BCH), ...
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Multisig with oracle

I am trying to develop an use case in which a user has its funds on a multisig 3-2 (one key staying with him, another with my app and another one with a type of oracle that can attest if some ...
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13 views

Maximum number of aggregated signatures with Schnorr

Is there a maximum number of signatures that can be aggregated into a single schnorr signature?
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40 views

why do we need to hash before we use a private key to digitally sign a transaction? isn't just using a private key enough?

why is a hash needed for digital signatures? isn't it redundant since the point of hashing is to ensure contents are not tampered with , which the digital signature can do as well (on top of ensuring ...
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Derivation path for brute forcing "25th word" on a multisig wallet

So I added a 25th word to my seed, forgot it, and am (after 6 months of on and off guessing) relegated to brute force (3rdIteration/btcrecover). Succinct question: what derivation path should I ...
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1answer
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Can Schnorr aggregate signatures be nested inside other Schnorr aggregate signatures?

The way I've understood Schnorr signatures is that multiple parties can combine their signatures into a one shared signature, thus obfuscating the number of participants involved in the signature ...
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1answer
227 views

Multisig transactions after taproot

Before taproot when we had a multisig transaction the vout had an array of addresses(Image 1). Now, this multisig transaction in Bitcoin core v22.0 is represented only as a multisig type without the ...
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1answer
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Is it possible to combine a native threshold-signature script with taproot?

Assuming we have N taproot addresses, is it possible to create an output that requires the signatures of t out N of those taproot addresses to be spent? I'm looking at a non-interactive protocol (i.e.,...
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`getaddressinfo` incorrect output for `ismine`

Running Core, trying to verify that I infact control a change address before I sign and broadcast a txn. But I can't find any way to list all future change addresses. I searched and found ...
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How to import YetiCold.com MultiSig Wallet into Electrum (watch only)

I created a multisig wallet using the instructions at https://yeticold.com/ (Level 3). It's supposed to only use Bitcoin Core and a small shim of GUI (https://github.com/JWWeatherman/yeticold/blob/...
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1answer
308 views

2-of-3 multisig with Schnorr signatures

From what I understand, Schnorr signatures will allow n-of-n multisignature transactions, however m-of-n isn't possible using the key path alone. Or is it? Suppose we need a 2-of-3 scheme. As far as I ...
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Why does the locking script for MultSig contain PubKeys instead of PubKeyHash?

I am reading "Mastering Bitcoin" by Andreas Antonopoulos. In the transactions section, the locking script for normal account(single address) is OP_DUP OP_HASH160 <Cafe Public Key Hash> ...
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1answer
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P2SH-Multisig transaction not going through

I have some funds locked in a testnet P2SH address which requires 2-of-3 signatures. This is the address: 2NEKRqUqoDtsELzpBa5wuWEiJeVbio5cSa2 and the 3 keys: #1 - ...
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How do Electrum/Sparrow/Caravan generate multisig addresses?

I'm trying to "manually" confirm the Bitcoin addresses that Electrum, Sparrow, and Caravan generate from a deterministic multisig addresses. As an example, I have the following 2-of-2 wallet:...
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How do you sign an unsigned transaction using Electrum in a multisig setup?

I am experimenting with multisig in testNet between Electrum and Caravan by Unchained Capital. I created a 2-of-2 multisig in Electrum with BIP 39 seeds. I then created a watch-only wallet in Caravan ...
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1answer
79 views

How to spend a taproot output using key path with a threshold signature scheme when the secret key is never computed?

In taproot, in order to spend the keypath, the transaction must be signed using the tweaked private key instead of the normal private key (as defined in BIP 341). However when computing a signature ...
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Can you explain how to set up a basic M-of-N multisig between multiple people using descriptor wallets and PSBTs, as well as a signing flow?

Can you explain how to set up a basic M-of-N multisig between multiple people using descriptor wallets and PSBTs, as well as a signing flow?
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2answers
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Is multisig wallet simply a combination of many singlesig wallets?

I’m trying to create a multisig wallet for the first time. My pre-understanding is that multisig wallet is simply a combination of many singlesig address. So for example I have 3 existing singlesig ...
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1answer
123 views

Can't sign using Trezor T derived multisig wallet using Electrum | Invalid script_type

I created a P2WSH multisig wallet using Electrum 4.0.9 using a single Trezor T, to which I sent a large amount of BTC. Electrum allowed me to set up the wallet using the same device when I used two ...
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Procedure to recover BTC stuck in 2/2 Multisig

I opened a 2M Sat Channel and my peer should send me back 1M Sats Onchain, as I have pushed half. Now unfortunately, I’ve sent my peer the address of the 2/2 Multisig of the funding TX and not the ...
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1answer
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Retrieve the xpub and private key of a given path (Bitcoin Core)

How do we retrieve the xpub and the private key (for signature) of a given path (m/87h/0h/0h, for example) for legacy and descriptor wallets in Bitcoin Core?
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`addmultisigaddress` syntax for POST request

Copied the body part from https://bitcoincore.org/en/doc/0.21.0/rpc/wallet/addmultisigaddress/ and replaced addresses with 2 new addresses (regtest): POST / HTTP/1.1 Host: localhost:18333 ...
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I can't broadcast raw transaction with return false

I'm going to transfer funds from the multisig address. Multisig address is 2/3 format. The two signature is done successfully but sendrawtransaction function don't be implemented. Help me about it! My ...
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1answer
129 views

Multisig and RBF after taproot

Are there any benefits of above setup after taproot is activated that improve privacy in any way? What is the setup? 3of3 multisig address with 0.1 BTC unspent Alice, Bob and Carol own the keys for ...
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1answer
37 views

Can a non multisig wallet be a cosigner of a multisig wallet?

Let's say I have an existing BTC wallet, which is not multisig. Can that wallet be the cosigner of a multisig wallet?
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42 views

delayed multisig tx with blocking feature

Is there a way to do a 1of3 multisig scheme were the tx is delayed for some time and any of the other 2 parties can do something to cancel the tx? so it would be like a 3of3 multisig but with a death ...
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1answer
50 views

Do BIP199's HTLCs suffer from script malleability?

Do BIP199 HTLCs suffer from sigscript malleability like multisigs do due to OP_CHECKMULTISIG?
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2answers
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Is there a multisignature scheme that don't need xpub backups?

A disadvantage of a HD multi-signature scheme compared to a Shamir's Shared Secret Scheme is the need to back up the xpub keys. There's no BIP39-like encoding for xpubs, they're long, and they're ...
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1answer
126 views

Why is it bad to split up a wallet seed redundantly?

I have been reading a lot about wallet security and this seems to be universally considered a bad idea (see for example this video or this answer), but I am struggling to see why it is not a good ...
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1answer
53 views

Is there a way to create a timelocked mulstisig wallet from bitcoin-cli [duplicate]

So, I read that with the new taproot upgrade, now there is a possibility to reduce the number of signatures necessary to create a valid transaction in a multisig wallet. For example, create a 3-5 ...
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1answer
185 views

Possible number of signers with MuSig

With multisig, up to 20 signatures may be used in a threshold signature scheme (What are the limits of m and n in m-of-n multisig addresses?). As far as I understand, there should be no hard-coded ...
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1answer
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Is there any statistical evidence that 2 of 3 wallets are indeed the most common one?

I read the following statement: 2 of 3 wallets are the most common multi-signature wallets created. In this case, the wallet requires three signatures, but only two are needed to authorize a ...
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1answer
152 views

Output Descriptor for an Arbitrary Script

Can output descriptors be used to describe an arbitrary script? Say I had a script something like the following: OP_IF 1737417600 OP_CHECKLOCKTIMEVERIFY OP_DROP OP_DUP OP_HASH160 <pubKeyHashD> ...
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Consolidating BTC across multiple address but same account

Say a user generates three "linked" addresses (e.g. m/44'/0'/0'/0/0, m/44'/0'/0'/0/1, m/44'/0'/0'/0/2) using an HDWallet and receives 1 BTC to each unique address. For each of the addresses ...
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1answer
88 views

Multisig Setup - Pruned Bitcoin Core on Computer vs. Dedicated Hardware

Are there security implications of running a pruned Bitcoin Core node on a personal computer vs. a full Bitcoin Core node on a dedicated hardware device (i.e. Raspberry Pie with Umbrel, myNode, nodl, ...
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1answer
49 views

Multisig Wallet Setup - Security Tradeoffs With Pruned Bitcoin Core Node?

What are the security tradeoffs of running a pruned Bitcoin Core node for a multisig wallet, such as Specter? It seems that using a multisig wallet with a pruned Bitcoin Core node could be a good ...
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1answer
52 views

Address that can pay "commission"?

There is a use case where person A needs to send person B, .9 BTC. Person C, who set up the transaction, should get .1 BTC as commission. I know this is possible to do with a traditional "...
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P2SH address as a product of public keys

Assuming the multisig 2 of 3, if I do have extended public keys (xpub) for all 3 cosigners (with proper derivations), can I somewhat get the result address (P2SH)? How to calculate the "script&...
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1answer
128 views

Is this scheme for multisig audit of Trezor + Coldcard ok?

My plan is to make a multisig between coldcard and trezor. I want to audit and verify that I indeed own the 2 keys of these wallets, using a raspberry pi zero (no wifi/bluetooth by definition) on a ...
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1answer
78 views

Bitcoin 2 of 4 Multisig script with one required

Hi I am to write a bitcoin locking script with property that 2 out of 4 signatures should be verified, but among those verified 2 there is a specific signature that should be verified. I.e only 1 ...
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1answer
281 views

Taproot and Large multisigs

I have seen lot of people saying that taproot is only for large multisigs used in few projects or companies. BlueMatt mentioned similar thing in last Taproot activation meeting: 13:01 < BlueMatt&...
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1answer
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Trade-offs in 2 of 3 multisig release transaction

What are the trade-offs involved in: Buyer and seller signing the transaction. HodlHodl signs the transaction only in case of dispute. Vs Seller and HodlHodl signs the transaction. Buyer signs the ...
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1answer
51 views

Is receiving address description public domain?

Exploring Electrum and see that I can add a description when generating a receiving address. The description cannot be edited later... would you happen to know why? And is that description public ...
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1answer
111 views

Verify that WIF corresponds with bip32 extended public key

I have a bip38 encrypted private key that I lost the password to, and I have its corresponding extended public key. I want to brute force passwords as I have an idea of what it might be, but I need to ...
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0answers
112 views

Recovering 2 of 2 multisig HD Wallet with bip38 encrypted private key

I have been trying to figure out if it is possible to restore my wallet with the current information I have. The wallet is a 2 of 2 multisignature HD wallet The first key is Bip38 and requires a ...
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0answers
22 views

Multisig wallet issue - pair nodes (daemons) wallet.dat and pvt keys

Intro: I am having an issue of accessing multisig wallet. due to previous situation I have mixed up private keys and wallet.dat files Multisig is 2 out of 3 Multisig works this way: Synchronize ...

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