Electrum2026-09-12 16:42:58Electrum 4.8.2 fixes critical Lightning wallet backup issue and adds security hardeningElectrum has released version 4.8.2 with a set of security fixes and broader hardening for its Bitcoin wallet codebase, according to a post by Bitcoin News on X. The release incorporates findings reported by Bitcoin Red Team, Calle, l0rinc, haoxucu, and m0wer. A key fix addresses a critical backup issue affecting some Lightning wallets that used non-deterministic keys and anchor channels. In those cases, channel backups and full wallet backups could miss the keys required to move funds on-chain after requesting a remote force close. Impacted users will see a warning when starting Electrum and are advised to export a new backup, as older backups cannot correctly recover funds in that scenario. The update also tightens Lightning HTLC validation, rejects malformed xpub/xprv keys that may previously have been accepted, expands security hardening across the codebase, and prevents the Android QR code scanner from reading screenshots. The release is Electrum’s third security-focused update since July, following versions 4.8.0 and 4.8.1.1440
Policy Regula2026-07-27 00:19:51Blockaid says Garden HTLC is under attack, with about $450,000 in USDT stolenBlockaid said Garden’s HTLC is currently under attack, with roughly $450,000 in USDT reported stolen across Ethereum, Base, Arbitrum and BNB Chain. Garden later said on X that it had detected abnormal activity, temporarily shut down the application, and started a full investigation. The project added that more information will be released later. The update was cited by ChainCatcher in a brief newsflash. No further details on the attack method or the affected transactions were provided in the source text.2060
Bitcoin2026-07-22 11:40:13Chinese Edition of Mastering the Lightning Network Highlights 17 Chapters of Bitcoin Payment MechanicsDr. Awesome Doge revisited his translation of Mastering the Lightning Network, saying the 17-chapter book fills a major Chinese-language gap on payment channels, HTLCs, onion routing, and Lightning privacy trade-offs.620
Bitcoin Layer2026-07-08 16:16:13Mintlayer v0.6.0 Goes Live on Testnet: Native Bitcoin Atomic Swaps ArriveBitcoin Layer 2 sidechain Mintlayer releases v0.6.0, enabling native Bitcoin Atomic Swaps via HTLC on testnet, with mainnet transition imminent. The update also adds Trezor firmware support and paves way for ZK Thunder Network.680
Mintlayer2026-07-08 16:12:15Mintlayer Activates Native Bitcoin Cross-Chain Swaps on Testnet With Version 0.6.0Mintlayer has launched version 0.6.0 on testnet, introducing HTLC-based native Bitcoin cross-chain atomic swaps, expanded swap flexibility, and Trezor custom firmware support.740
Bitcoin2026-05-29 12:00:11Bitcoin Lightning Network: The Complete Guide to Instant, Low-Cost Off-Chain PaymentsThe Lightning Network is a Layer-2 payment protocol built atop Bitcoin to resolve its scalability bottlenecks. By using bi-directional payment channels, transactions can be processed off-chain—achieving near-instant settlement and extremely low fees. This comprehensive guide explains Bitcoin's throughput and cost limitations, the mechanics of channel opening, transacting, and closing, the routing system that enables multi-hop payments across the network, and the critical role of Hashed Timelock Contracts (HTLCs) in securing trustless transfers. We also examine current challenges related to routing reliability, channel liquidity, and attack vectors, along with recent real-world adoption by firms like MicroStrategy and Strike.970
Bitcoin2026-05-28 03:00:22Understanding the Lightning Network: How Bitcoin's Layer-2 Payment Protocol Enables Instant TransactionsThe Lightning Network is a Layer-2 payment protocol built on the Bitcoin blockchain, enabling near-instant micropayments through bi-directional payment channels. Designed to tackle Bitcoin's scalability challenges—such as 10-minute block times, limited throughput of about 7 transactions per second, and high fees that peaked above $60 in April 2021—it allows users to transact off-chain with extremely low costs. This guide explains the history of the Lightning Network from its proposal in 2016, the activation of SegWit in 2017, to its mainnet launch in 2018. It details the mechanics of opening, transacting within, and closing channels, as well as multi-hop routing using source and onion routing and hashed timelock contracts (HTLCs). Today, the network has around 16,000 active nodes, but faces routing issues, liquidity shortages, and security vulnerabilities. Nonetheless, industry adoption continues: MicroStrategy is working on Lightning solutions, and Strike has launched remittance services in the Philippines powered by the Lightning Network. The article covers key concepts, practical examples, and the current state of this evolving technology.1830
