How can you confirm on-chain that a transaction was really sent by you?
A signature is bound to the message it signs. Change even a single byte, and the original signature will no longer verify.
Digital signatures use a pair of keys: the private key generates the signature, and the public key verifies it. You cannot derive the private key from the public key.
The most important thing to keep in mind when managing funds: anyone asking you to provide your private key or recovery phrase to “verify a signature” is a scammer. A genuine signature never requires you to hand over your private key.
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