For the most part there have been no critical problems with ElectrumSV that require releases. So we have been working on our next big technical upgrade. This document is intended to describe what we have been doing for that upgrade so far, and what else has to be done.

This is a technically oriented update.

Goal

The focus of this effort is to clean up the wallet code and prepare for a P2P future, removing a lot of the legacy approaches we are stuck with.

Progress so far

We’ve made a lot of great progress getting rid of a lot of technical debt and…


This document aims to record the plan for moving the focus of ElectrumSV away from monitoring the blockchain to a P2P focused approach. Due to the complicated nature of this, and the fact that it cannot be done wholesale, it is even more necessary to ensure this design document records both the reasoning and the nuances of the planned approach taken for later reference.

It is a copy of an original document shared on Google Drive, and is not guaranteed to be updated to match the original.

Overview

The way SPV was interpreted for the original Electrum wallet was that a…


Overview

As work on the second refactoring effort proceeds, we need to ensure that the model we use to respond to reorgs is correct.

Current approach

  1. The wallet is notified that a transaction is mined, by examination of the scripthash history for a key that is used in the transaction.
  2. The wallet knows when the blockchain is reorganised through processing the headers that it receives from any of the servers it is connected to, through a different chain of headers becoming the longest.
  3. Transactions above the fork height have their proof removed, and a new proof is fetched for each.

Flaws

Reorg detection

Headers are synchronised…


When Bitcoin Cash split from Bitcoin SV to become some strange variation on what Bitcoin used to be, we were left with a problem. Transactions made for either blockchain were valid for the other blockchain. This meant that if a user sent unsplit Bitcoin SV, it would also move the Bitcoin Cash to the same payment destinations. And vice versa, sending the Bitcoin Cash would send the Bitcoin SV.

This article is not intended for non-technical users. It is intended to define the current technical state of coin-splitting for my own reference, as of the date of writing. …


This article covers the release of ElectrumSV 1.3.11, and some of the more important changes that have been made since ElectrumSV 1.3.10. Skip to the “What has changed in this release?” section to see what has changed, if that is what you are here for.

Do you need an introduction to how ElectrumSV works?

We have a selected range of guides to common tasks that our users may want to do in our documentation, please check it out.

Where can you download ElectrumSV?

The only safe downloads are available on: electrumsv.io

Where can you get help?

Find our issue tracker here where you can create a ticket. Fill out the issue template, please! Otherwise we have no idea what…


This article covers the release of ElectrumSV 1.3.10, and some of the more important changes that have been made since ElectrumSV 1.3.9. Skip to the “What has changed in this release?” section to see what has changed, if that is what you are here for.

Do you need an introduction to how ElectrumSV works?

We have a selected range of guides to common tasks that our users may want to do in our documentation, please check it out.

Where can you download ElectrumSV?

The only safe downloads are available on: electrumsv.io

Where can you get help?

Find our issue tracker here where you can create a ticket. Fill out the issue template, please! Otherwise we have no idea what…


This article covers the release of ElectrumSV 1.3.9, and some of the more important changes that have been made since ElectrumSV 1.3.8. Skip to the “What has changed in this release?” section to see what has changed, if that is what you are here for.

Do you need an introduction to how ElectrumSV works?

We have a selected range of guides to common tasks that our users may want to do in our documentation, please check it out.

Where can you download ElectrumSV?

The only safe downloads are available on: electrumsv.io

Where can you get help?

Find our issue tracker here where you can create a ticket. Fill out the issue template, please! Otherwise we have no idea what…


This article covers the release of ElectrumSV 1.3.8, and some of the more important changes that have been made since ElectrumSV 1.3.7. Skip to the “What has changed in this release?” section to see what has changed, if that is what you are here for.

Do you need an introduction to how ElectrumSV works?

We have a selected range of guides to common tasks that our users may want to do in our documentation, please check it out.

There is also a guide that illustrates some of the common uses of ElectrumSV. Especially if you are new to ElectrumSV, or coming from ElectrumSV 1.2.5 (or even earlier versions). …


A user has reported losing a lot of BSV because they changed the script type of their multi-signature wallet to “accumulator multi-signature”. Please stick with the default script types for all of your wallets unless you are willing to accept the risk.

There are a lot of ways to lose coins with ElectrumSV, it is an open source wallet and some call it the “swiss army knife” of wallets. Unfortunately, this means it is very possible to cut yourself.

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Why does ElectrumSV have this?

Originally when we were preparing for the Genesis upgrade and the deprecation of P2SH payments, we needed to support other types…


In the last day or so I changed how we do Trezor signing so that we provide the signing process with the transactions containing spent coins, and so that their latest firmware can work with ElectrumSV. I feel like I should write some notes about it and make sure I understand where things are with ElectrumSV and hardware wallet signing.

Trezor signing

The Trezor team does not provide Bitcoin SV support in their software. You have to use Trezor devices as if you were using Bitcoin Cash.

When ElectrumSV goes to sign a transaction, it detects it needs to provide the transactions…

Roger Taylor

ElectrumSV developer

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