Topic: Signed raw transaction - page 3. (Read 522 times)

Thank you. Do any of these wallets have an API to send the signed transaction to an external service? Only the signed transaction, no private keys or anything else.

 

In electrum it's very easy, but in wasabi it's the easiest since they actually have a wizard to create transactions, and at the end of the wizard they just show you the transaction without broadcasting it (semantics, and personal preference ). The only thing you have to do is use the correct wizard (since there are 2 ways of creating transactions in wasabi, one broadcasts the tx automatically, the other one just shows the signed tx without broadcasting).

Also, OP, bitcoin core can indeed be used to create and sign a transaction without broadcasting it... I don't know if there is a gui wizard available to do this, but you can defenatly do it from the console. Fair warning: if you use the console, things do get a bit complicated... You first create a raw, unsigned transaction, then you use a second command to sign it... The first step needs the list of unspent outputs you'll be using, and a list addresses and values that will be funded using the new unspent outputs. You'll have to calculate the fee by yourself, and make sure everything checks out before broadcasting the transaction. Not very newbie-friendly.

A different option would be to download coinb.in's sourcecode and run it offline when you get to the signing-step... It guides you trough the process of creating a transaction and signing it... Be carefull with your private key tough! don't save it in an unencrypted way, and make sure you reboot your machine after the signing step.

Maybe it's easyer if you tell us why you want to do this? Is it a learning experience? In that case i'd suggest using coinb.in or bitcoin core on the testnet...

It's easiest in Electrum: click Preview, click Sign, and click Copy. The common way to use this is to create an unsigned transaction from an online read-only wallet, then signing the same transaction from an offline wallet that has the private keys.

Is there an easy way to get the signed raw transaction on bitcoin core, electrum wallet or any other popular wallets before or without broadcasting the transaction to the network?