Solana cbBTC

About

Solana cbBTC is the mobile BTCfi app for Solana Seeker users — the most direct, hardware-secured way to put Bitcoin to work on Solana. cbBTC (Coinbase Wrapped BTC) is Coinbase's 1:1 Bitcoin-pegged token — the largest wrapped Bitcoin on Solana mainnet with $340M+ market cap. Swap, supply, and borrow cbBTC from your Seeker — and now pay and receive over Bitcoin's Lightning Network — all non-custodially, with Jupiter Swap v6 routing, Kamino lending, Atomiq Lightning atomic swaps, and Mobile Wallet Adapter (Seed Vault) integration. ⚡ NEW — Bitcoin Lightning (experimental): pay and receive Bitcoin Lightning invoices using your Solana assets (USDC · SOL · cbBTC) from a dedicated tab. Fully non-custodial — you sign only on the Solana side, an independent liquidity provider settles the Lightning leg, and an on-chain HTLC (audited escrow) refunds you automatically if a payment fails. No app fee, a small per-payment cap (experimental), and a cryptographic proof of payment (preimage) shown after each successful send. Key: Seed Vault hardware key security · Jupiter best-route swaps (cbBTC ↔ SOL/SKR/USDC) · cbBTC lending via Kamino (supply/withdraw, borrow/repay USDC) · health & liquidation-price risk display · ⚡ experimental Bitcoin Lightning send/receive (non-custodial, no app fee, small-amount cap) · proof-of-payment (preimage) · quote-expiry guard · low-SOL gas warnings · in-app guides with infographics · offline auto-detection · app lock (biometric/PIN) · share swap result · Korean/English · Light/Dark mode · no backend servers · no analytics · MIT open source. GitHub: https://github.com/dhryoo/solana-cbbtc

What’s new in 0.5.4

v0.5.4 — Safer lending, smoother swaps and a clearer Lightning flow • Lending now works with an open loan — you can withdraw or add cbBTC collateral even while a USDC loan is open (this previously failed). Withdrawals are capped to keep your loan safely collateralized, and "repay all" is blocked up front if your USDC balance can't cover it. • Clearer borrow/repay amounts — the Borrow and Repay screens now explain up front why the amount shown can read slightly below what you type (USDC is worth about $1, not exactly $1, and interest accrues over time), so it doesn't surprise you at repay. • Swaps check before you sign — a swap that would fail on-chain (for example, the price moved past your slippage) is now caught before signing, so you don't waste gas on it. • Clearer Lightning flow — the payment quote and the Pay button now open in a bottom sheet so you can't miss them, and the screen scrolls to your payment result when it's done. More Lightning addresses are accepted, and Lightning payments now use the app's RPC failover for fewer stalls. • Reliability & polish — the "no internet" banner clears itself when you reconnect, small accent text now meets accessibility contrast, and tab labels are consistent across languages. Self-custody as always — keys stay in Seed Vault, no backend or trackers, no app fee.