🔐 Live Bitcoin Multisig Signer – Automation for Shared Custody

I'm working on a system where a live server can automatically sign Bitcoin transactions (PSBTs) as part of a 2-of-3 multisig setup.

Use case:

1 key = your mobile wallet (e.g. Nunchuk)

1 key = cold storage

1 key = held on a live server that signs PSBTs under certain rules

📩 You send a PSBT to the server → it reviews it → signs it → sends it back.

The idea is to automate multisig signing while still requiring multiple parties to approve a transaction.

✅ Pros

Semi-automated custody without full trust

Rules can be enforced (limit amounts, whitelist addresses, etc.)

Useful for DAOs, families, small orgs, or programmable escrow

⚠️ Cons

Relies on trust in the signing server

If compromised, it weakens the multisig

Downtime means delays in spending

Re-centralization risk?

💭 Would you trust a system like this?

What conditions would make it safe enough?

Do you see it as smart coordination or a security loophole?

Open to feedback & debate.

#bitcoin #multisig #automation #custody #nostr #psbt