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Is it possible to calculate the transaction size from the transaction id ?
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Is it possible to calculate the transaction size from the transaction id ?
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No. That's not possible.
A transaction id is calculated from the raw transaction. More specifically the raw transaction is hashed twice with sha256: sha256(sha256(rawtransaction)).
That means, that the id is always 256 bits long (64 characters). Because sha256 and hashing in general is a one-way-operation, it's not possible to calculate the size of the rawtransaction just from the transaction id.
if you need more information about a transaction, you have to fetch that from a client. In bitcoin core you can use gettransaction or getrawtransaction. (getrawtransaction only works if the transaction belongs to one of your addresses or you have txindex enabled in your wallet.)
I think this should answer to your question more than exhaustively. If yes this can be marked as duplicate, I suppose.
– AG23 – 2019-01-15T11:05:30.417