Electrum 4.8.3 closes a fee-bump theft path
Electrum 4.8.3 rejects a malicious server's substituted transaction before a fee bump can turn it into a valid payment. One user reported losing funds.
Understand Bitcoin. Put it into practice.
Bitcoin education, practical guides and sourced news. Explore wallets, self-custody, Lightning and the people building the ecosystem.
The library
Browse everythingExplainers
24What a thing is, assuming nothing. Start here if the words are new.
- What is a Bitcoin confirmation?
- What is a Bitcoin compact block?
- What is Bitcoin transaction locktime?
- What is a dust output?
Guides
22Sit down and do one thing, with a way to check it worked.
- Verify a Bitcoin descriptor checksum offline
- Raise the fee on a pending Bitcoin payment
- Inspect a PSBT v0 envelope offline with Python
- Plan a Bitcoin payment fee without sending anything
Deep Dives
9The mechanism underneath, with the spec and the constants.
- The 2018 hash war, and what hashrate cannot decide
- Bitcoin has no balances, only unspent outputs
- How Bitcoin holds a ten-minute block interval
- The Lightning implementations, and how they differ
Features
13An argument, with the strongest version of the other side.
- The block size war, and what it settled
- Nobody is in charge of Bitcoin, which is the hard part
- Why You Should Accept Bitcoin at Your Beachfront Business
- Texas passes a Bitcoin reserve law: what changes