today we’re announcing grid global accounts, financial infrastructure built for platforms defining the next era of fintech. fintech needs a new architecture. money is becoming global, instant, programmable, and increasingly operated by both humans and agents. but platforms have been stuck between two bad options: rent the stack and give up economics, or become a bank and spend years stuck in bureaucracy before they process the first transaction. that changes today. grid global accounts gives platforms a full global account stack in one integration: global dollar accounts, native AI agent permissions, visa cards, instant offramps in 65 markets, cross-chain interoperability, native Bitcoin, and much more. @lightspark handles the complexity underneath. Platforms keep the brand, the customer relationship, and the economics. reach out for a live demo here on X or at davi@lightspark.com

Tether Wallet, The People's Wallet Tether has achieved the widest financial inclusion success story in the history of humanity. For more than a decade, Tether has built its company on a simple mission: bringing financial inclusion to the billions of people, primarily living in developing countries, who were left behind by the traditional financial system, those who never had access to basic financial services, and those who live in high-inflation countries. This number is higher than most think, almost half of the population of the world. As of March 2026, Tether’s technology is used by more than 570 million people globally, with adoption continuing to accelerate across emerging and developed markets alike, at the pace of tens of millions of new wallets added per quarter. With tether.wallet, that entire infrastructure, the widest and most granular money distribution network built by humanity, becomes directly accessible to end users for the first time. Features: - 100% self-custodial with simple backup user experience (one click encrypted secret backup/restore with your cloud account or simply export the 12 words); only you are in control of your funds; no middleman or intermediaries. - Assets available: only people need; Bitcoin, Digital Dollars (USDT, USAT) and Gold (XAUT). - Bitcoin: on-chain, lightning network and spark support - USDT/USAT/XAUT: supported blockchain list will expand rapidly within next 30 days; USDT0 is already integrated; soon TW will implement seamless swaps across all chains -> insane user experience - Send transaction user experience perfected for the people; gasless send for USDT/USAT/XAUT, i.e you don't need to own/buy/deposit gas tokens (ETH, TRON, ...) etc to send assets; the Wallet solves all the complexity for you behind the scenes (via paymaster) - One address: generate your [at] tether.me address to receive/send assets to any other tethered wallet -> unparalleled user experience - 100% built on WDK by Tether, our open-source Wallet Development Kit Please share your feedback and thanks for all you support. We're unstoppable together ❤️

Tether ❤️ Bitcoin Bitcoin via Spark support in WDK (Wallet Development Kit) works seamlessly. People, machines and AI agents can now transact in Satoshi micropayments. CC @lightspark @davidmarcus

Introducing BTC Rewards for USDB holders. Hold 10 USDB on @spark earn up to 6% back in Bitcoin. No lock-ups, no staking, no bullsh*t.

Instant, Bitcoin-powered settlement is now live across the EU & UK. We’re partnering with @herclegroup to connect deep EUR/GBP liquidity so institutions can move money between Bitcoin and bank accounts in seconds, not days. Learn more: lightspark.com/news/lightspa…

BITCOIN RAILS #39: The Bull Case for Statechains & Why Big Tech Wants Self-Custody Too | with @lightspark CTO & @spark creator @kphur 🔗YOUTUBE: youtu.be/XtcFU7UvHco 🌿SPOTIFY: open.spotify.com/episode/195… It was about four years ago that Facebook’s famous effort at creating its own cryptocurrency and crypto-native payments system (Libra, then Diem) was effectively halted by an unending stream of regulatory scrutiny and compliance blocks. Some leaders of the project went on to create crypto-projects of their own (e.g. SUI and Aptos), however, “Head of Facebook Financial” @davidmarcus, along with Diem wallet technical lead @kphur made the key bet that Bitcoin’s decentralized rails were the only in the crypto space likely to be undisrupted by regulatory roadblocks long-term. They went on to create @lightspark - initially designed to make Lightning “usable” by enterprise payments companies - but ultimately came to the conclusion that Lightning alone was not going to scale to 8 billion people globally. After heavy research on scaling solutions for Bitcoin, they eventually developed a “statechains” layer-2 solution of their own @spark – which, since going live, has garnered attention from Ordinals degens to enterprise payments companies alike. In this episode, @kphur and I get into: — How the Libra/Diem regulatory blocks went down and why these concerns will likely only be addressed by a truly decentralized system like Bitcoin ( self-custody on the wallets side) — Why Lightspark started building on the Lightning Network (raising more than 2X field leader @lightning ), but developed serious concerns about its ability to scale — What a multi-system Bitcoin scaling future might look like: with Lightning as the liquidity provider feeding self-custody friendly systems like Spark, Ark, e-cash systems, and more. —What a multi-system Bitcoin scaling future might look like: with Lightning as the liquidity provider feeding self-custody friendly systems like Spark, Ark, e-cash systems, and more. Bitcoin Rails is powered by: — Best In Slot (@bestinslotxyz) – the leading API for Ordinals and BRC-20 data aggregation and indexing — Spark (@lightspark) – a Statechains implementation leading the path toward institutional adoption of Bitcoin-powered payments — Citrea (@citrea_xyz) – the leading Bitcoin rollup technology and contributor to the BitVM alliance 📌 Timestamps 00:00 Intro 00:26 How Lightspark came to life 03:41 Lessons from Libra and Diem 08:35 Universal Money Addresses and global payments 13:45 How traditional finance is approaching blockchain adoption 33:08 The core challenge of Lightning 37:53 Exploring alternatives: ARC and Statechains 40:18 How Statechains work and their benefits 56:43 The future of Lightning and Spark’s role

After years working on one of the most widely watched crypto projects in the world (👋 Libra/Diem @Meta ), @lightspark CTO @kphur shares why he and tech heavy weight @davidmarcus knew they "had to build on Bitcoin... because it's the only [chain] that matters." "Where the problem came in was scaling for self-custody... we're not gonna be able to do that on Lightning." Full episode on the development of statechains-style L2 @spark drops tomorrow—and yes, we're gonna talk about what happened at @Meta