There are two types of multi sig wallet offered by Blockstream wallet which are Standard Accounts (2-of-2) and 2-of-3 Accounts.
I am not asking if there are two types of multisig wallet on Blackstream Green, I am referring to 2 of 2 wallet. You can know that I explained it already that we know the mechanism 2 of 3 multisig is working but I want to know about 2 of 2 multisig. The question is that if it is 2 of 2, that what mechanism will be used to spend from it if you lost the 2FA because there is no way you can use Blockstream server to sign the PSBT transaction.
Suppose you lost your recovery seeds which is either 12 or 24 words seeds. In that case, I don't think there is any way that you can access the funds even though the standard 2 of 2 wallet disabled if there is no transactions made in 1-year time frame it becomes a regular wallet this means you can access the funds with only 12 or 24 words seeds that you supposed to keep safe.
Without seeds, there is no way you can recover anything and I bet Blockstream doesn't have backup of your seed words.
I am not saying if someone lost the seed phrase. What I am asking is if the wallet will turn to 1 of 2 or a single public key wallet? I think nc50lc understand what I am talking about. I will prefer to stick to 2 of 3 multisig.
If you create a 2 out of 3 multisig account, then you don't need Blockstream's help and signing keys to make transactions. You'll have two keys with the needed privileges to spend your coins. But with a 2 out of 2 wallet, you also need Blockstream's signature. There is a timelock period with these wallets. The 2FA will remain active if you make at least one transaction within 12 months approximately. If not, the timelock will expire, and you can spend from the wallet using ONLY your key.
You can read more about it here:
https://help.blockstream.com/hc/en-us/articles/900001391763-How-does-Blockstream-Green-s-2FA-multisig-protection-workI knew, all the explanations can easily be seen on the wallet. I know that I can be able to recover it but with a tool.
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fwww.talkimg.com%2Fimages%2F2024%2F05%2F21%2F194Q9.jpeg&t=665&c=BnNQ7WbX9kxOIQ)
If you click on the recovery tool in green, it will take you to the tool on GitHub. The question is that how is the tool working? I know that I can use the tool for the recovery if the time I set for it without spending has passed.
If it's the script that they used, after an approximate of 360 days,
you can spend the output(s) as a simple single-sig (CHECKSIG) without even requiring Blockstream's public key like that of a 1-of-2 MultiSig.
If this is the case, the answer is closer to "it become Single Sig" than "it become 1-of-2 MultiSig".
Another thing that I guess is that the tool can be used to recover the second private key instead of using Blockstream server for the signing, making it possible for the person to be able to use the key that the server supoose to use for the signing.
Thank you all for your answers.