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I recently started a Blockchain course and came across the electrum software. While going through the list of wallet addresses and associated private keys I found that 'p2pkh' is placed at the start of every private key, why is that? enter image description here

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A single private key can lead to different addresses, depending on the script it is used in - These include p2pkh, p2wpkh, p2sh-p2wpkh.

Electrum prepends the script type to the private key during export and import so that it knows which address to derive and check for outputs on.

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