Imagine a scenario where you have 3 wallets. Two wallets are cold, the other one is hot and is for everyday use.
"Cold wallet A" is for hodl and has 10BTC.
I send 1BTC to Cold Wallet A from Hot Wallet A, I check that the transaction succeeded and I "tell" Cold wallet A that it now has 11BTC. Cold wallet A exposes a "receipt".
That "receipt" is an encoded string that represents a signed transaction to send all the funds in Cold wallet A at that moment, to Cold wallet B. The receipt can be stored offline, online, replicated, printed, whatever. It cannot be modified. It does not expose private keys. It is just a signed transaction.
And for the sake of simplicity, let's put aside the fees for that transaction, it can be part of the "receipt" generation/export process.
Is it safe to assume that now I have a recovery method for my main wallet (Cold Wallet A) if every other measure I take to protect it fails? Do I now have a transaction that a family member can broadcast if I have let's say, an accident?
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