FAQ

PayX is a payment protocol on Arc mainnet that lets you send USDC to any X account. Funds are held in an onchain escrow under the handle until the creator signs in with X and claims them to a wallet of their choice.

PayX is non-custodial: funds sit in a smart contract, not with us, and there is no admin function that can move user escrow. Creators do not need a wallet to receive, everything is transparent onchain, and Arc settles in under a second.

PayXTipping v2 uses OpenZeppelin building blocks (ReentrancyGuard, SafeERC20, Ownable2Step, Pausable, EIP712), is owned by a 2-of-3 Safe, and was reviewed line by line before launch. As with any smart contract there is residual risk; send amounts you are comfortable with.

Arc mainnet (chain ID 5042), Circle's stablecoin-native Layer 1. USDC is the native gas token, so you never need another token.

Go to xylonet.xyz/pay (or xylonet.xyz/@handle to prefill), enter the X username, choose an amount, add an optional message and confirm. The first time you pay an amount you also approve exactly that much USDC for the contract. The Chrome extension does the same from x.com.

The minimum is 0.1 USDC (minTipAmount = 100000 in 6-decimal units). Each supported asset has its own PayX contract with its own minimum.

Currently USDC. PayX runs one escrow contract per supported asset, so each new asset is added as its own PayXTipping instance with its own minimum and its own claims.

A 1% platform fee (100 bps) goes to the XyloNet Treasury Safe, and Arc charges gas of roughly $0.01 in USDC. On a $10 payment the creator receives $9.90.

Yes. The handle is normalized onchain (lowercase, a–z 0–9 _, 1–15 characters). The creator does not need a wallet or a PayX account to receive.

Yes, up to 280 bytes. Messages are stored onchain and visible to the recipient in their hub.

Bridge USDC from Ethereum, Base, Arbitrum and other chains with the XyloNet bridge at xylonet.xyz/bridge (Circle CCTP under the hood), or withdraw from an exchange that supports Arc.

Visit xylonet.xyz/pay/creator, sign in with X, connect a wallet on Arc and click Claim on the asset you want (each supported asset has its own contract and its own claim). Our oracle issues an EIP-712 authorization for your handle, wallet and that contract; the contract verifies it and pays out your whole pending balance of that asset.

No. Anyone can pay your handle before you have a wallet. You only need one when you are ready to claim.

Indefinitely. There is no expiry and no admin function that can remove them.

No. Each claim withdraws the entire pending balance in one transaction.

Payments are indexed by the handle text, not your X user ID. Payments sent to your old handle stay under that handle; whoever can sign in as that username can claim them. Tell your audience your new handle before you rename.

Your first claim on a given contract links a wallet to your handle there and later claims on that contract must come from it (WalletMismatch otherwise). Each asset instance links independently. If you lose access, contact @Xylonet_: the Admin Safe (2-of-3) can relink your handle via adminRelinkWallet after verification. Relinking only redirects future claims.

Everything the extension does is available from the web at xylonet.xyz/pay while the Chrome Web Store listing is updated. We will link the listing here as soon as it is live.

It never has access to your private keys; every transaction is signed by your wallet. It only requests permission to add Pay buttons on x.com and to remember your wallet connection.

Any EVM wallet: MetaMask, Rabby, Coinbase Wallet, WalletConnect wallets. Make sure it is on Arc (chain 5042); the web app and extension offer to add the network.

Arc is Circle's stablecoin-native Layer 1. USDC is the native gas token, finality is sub-second, and fees are predictable in dollars.

Chain ID 5042, currency symbol USDC, RPC https://arc.drpc.org, explorer https://explorer.arc.io. The PayX pages will prompt your wallet to add it automatically when you send or claim.

Yes. PayX v2 runs only on Arc mainnet (chain 5042) with real USDC. There is no testnet mode in this app.

Yes. The USDC instance of PayXTipping v2 is at 0x47d4164F2f65afc00c7ba932cbEC9858b5FDAf0A on Arc mainnet; the source is verified on the Arc explorer. Any additional asset instance uses the same source and is listed on the smart contract page.

After X OAuth, our server signs an EIP-712 message Claim(string handle, address wallet, bytes32 nonce) under the domain {name: "PayX", version: "2", chainId: 5042, verifyingContract}. The contract recovers the signer, checks it equals oracleSigner(), rejects reused nonces, and pays out.

Solidity 0.8.24 with OpenZeppelin ReentrancyGuard, SafeERC20, Ownable2Step, Pausable, EIP712 and ECDSA. The web app is Next.js with wagmi/viem; the oracle signs with viem.

Yes. The contract is public: read pending balances, history and events with any EVM library. See the smart contract page for a viem example.