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If a transaction's hash doesn't change with data it makes blockchain mutable.

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A transaction hash is based on a transaction's data and nonce fields, among others. You can read about how transaction hashes are generated here.

A transaction hash is "mutable" (by definition), until is is included in a block on-chain. Once the transaction has been included in a block, it is immutable, as it lives on-chain and cannot be edited.

I'd like to clarify that any parameter of a transaction (to, value, etc.) is and will be mutable until the point it is included in a block on-chain.

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  • thanks a lot i am exploring blockchain and your answer helped me a lot. Mar 6, 2021 at 10:25

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