Voltic - a Kotlin/Jetpack Compose Android wallet for ethereum based on Arbitrum netwokr. Send ETH via QR or NFC tap-to-pay payment app
Voltic is a modern, privacy-first P2P self custodial payment application designed to make crypto as easy as a credit card tap, without the middleman. It leverages NFC and QR technology to enable instant, seamless transfers directly between users.
True P2P Privacy: Conduct your payments directly. No big companies spying on your spending habits.
Zero Middleman Fees: Stop losing 2% of every transaction to massive payment processors. Keep your money where it belongs.
KYC-Free: We believe in financial privacy. No intrusive "Know Your Customer" procedures required.
Tap-to-Pay Simplicity: The power of the blockchain with the convenience of a modern wallet. Just tap your phone against a merchant or scan a QR code.
Focused Usability: Unlike other wallets that clutter the UI with 100 coins across 10 different networks, Voltic chooses one robust network to ensure the best possible user experience.
full self custody No one can control your account but YOU ,Send anywhere anytime you want to Anyone around the world .
Each wallet is controlled by VolticSmartWallet.sol, deployed on Arbitrum One and Arbitrum Sepolia. The safety rules are enforced on-chain, not just in the app:
Spending limits: the contract rejects payments above the owner's limit, so a stolen phone can't drain the wallet.
Kill switch: the owner can freeze the wallet, which blocks payments until it's unfrozen.
EIP-712 signed payments with nonces: each signed payment is typed data that can only be used once, which prevents replay.
Status and what's next
Voltic is an early-stage beta and the contract hasn't been audited yet. Planned: sub-wallets (a card or trusted person with a daily limit and recoverable funds), account abstraction, and optional stealth addresses. Since there are very few users so far, new contract versions can ship as a clean redeploy with upgraded methods.
for more information please visit the github page
Voltic existed before the buildathon (self-custodial NFC/QR wallet on Arbitrum with its own smart contract). During the buildathon I made it more reliable and easier to use, in two releases: 0.4-beta: better handling of network/RPC failures with clear error messages, offline mode with per-wallet cached balances, better stability on older Android, and a reworked Solidity build flow (Foundry dependencies install automatically, OpenZeppelin v5.7.0 support). 0.4.1-beta: payments now wait for on-chain confirmation and check the receipt before showing success, with new "Transaction sent!" and "Payment received!" screens, NFC/QR payment detection, and clearer ETH/USD amounts. Next: a clean redeploy of the contract with upgraded methods, then sub-wallets, account abstraction, and optional stealth addresses. The new build flow makes redeploying quick and repeatable. Releases: https://github.com/Voltic-Pay/Voltic-App/tree/0.4-beta
self funded
