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Frequently Asked Questions

General​

What is XPHERE?​

XPHERE is a Layer 1 blockchain with a Dual-Chain Architecture: a Main Chain running optimized PBFT consensus (1-second finality), and a Proof Chain securing the network via PoW (xpHash). See the Whitepaper.

Is XPHERE EVM-compatible?​

Yes. XPHERE targets Cancun-level EVM equivalence. Any contract that compiles for Ethereum mainnet runs on XPHERE without modification. See EVM Compatibility.

What is the native token?​

On Mainnet it is XP, with 18 decimals — used for gas, staking, and protocol governance. On Testnet the native token is XPT, also 18 decimals. XPT has no monetary value and cannot be moved to Mainnet.

What are the Chain IDs?​

NetworkDecimalHexNative symbolExplorer
Mainnet202502170x134fe69XPxpscan.io, xp.tamsa.io
Testnet19989910x1e808fXPTxpt.tamsa.io

Check either against the live node:

curl -s -X POST https://testnet.x-phere.com \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'
# {"jsonrpc":"2.0","id":1,"result":"0x1e808f"}

See Network Info for the full parameter list.

Does XPScan show Testnet?​

No. XPScan publishes Mainnet data — its own footer states Chain ID: 20250217 — and no XPScan testnet instance is published. For Testnet, use the Tamsa Testnet Explorer at xpt.tamsa.io.

Wallets​

Which wallets support XPHERE?​

Any EVM-compatible wallet (MetaMask, Rabby, Trust Wallet, etc.) plus the native Zigap wallet. See Wallet Setup.

How do I get testnet tokens?​

Testnet tokens are XPT, not XP. Request them from the faucet: 10 XPT per address, once every 24 hours, free. Add the Testnet first (Chain ID 1998991 / 0x1e808f, symbol XPT, RPC https://testnet.x-phere.com), then check the resulting balance on xpt.tamsa.io. See Testnet Faucet.

How do I bridge from Ethereum?​

There is no Foundation-operated bridge available yet, so there is currently no supported route for moving assets from Ethereum to XPHERE. See Bridge for what will be published when one exists. To acquire XP today, use an exchange that lists it.

Mining​

What hardware do I need?​

An IceRiver XP0 xpHash ASIC — the only hardware currently supported for live mining. The legacy CPU software miner is deprecated and cannot produce valid xpHash blocks. See Mining and System Requirements.

What's the xpHash hard fork?​

A consensus upgrade to the Proof Chain PoW algorithm, already active on both networks (mainnet block 1,740,000, testnet block 327,400). Mining now requires the IceRiver XP0 ASIC. See xpHash Fork.

How are rewards calculated?​

A reward is minted every 60 blocks and split 20% Foundation / 40% Miner / 40% Union, and the emission reduces 26.28% per year. Transaction fees are distributed separately — see the next question. Worked figures are in Mining Rewards.

How are transaction fees split?​

Transaction fees are not entirely burned. Every fee is split four ways:

RecipientShare
Burn50%
Union20%
Miner20%
Foundation10%

The 50% burn is the figure most often quoted (see Tokenomics); the other half is distributed to the Union, the miner, and the Foundation. Miners therefore earn from network usage as well as from block issuance — see Mining Rewards and XPHERE Union.

Staking​

Where do I stake XP?​

In the XP Union Vault at stake.x-phere.com — the Foundation's non-custodial staking vault. See XP Staking (Union Vault).

Where does the yield come from?​

From validator rewards the Foundation's Union node actually earned — not from new issuance. Each day, 60% × (staked ÷ cap) of the inflow goes to stakers and everything else is burned. See How It Works.

Do I need to run a node or hold 35,000,000 XP?​

No. That threshold applies to Union validator membership, which is permissioned and separate. The vault has no node and no membership requirement — see Union Staking for the difference.

What does it cost, and how do I withdraw?​

0% fees — you pay gas only. Withdrawing is a request → 7-day cooldown → claim of 100% of your principal. See Fees & Risks.

Is the APR guaranteed?​

No. It varies with the node's earnings, and staking a smart contract carries risk. See Fees & Risks.

How do I avoid staking scams?​

Only ever stake at https://stake.x-phere.com, and check contract addresses against Contracts & Verification. The Foundation never asks for seed phrases or private keys and never DMs first. Ignore any "guaranteed APR" offer not published on the portal or the official channels.

Union​

What is the XPHERE Union?​

The XPHERE Union is the network's core validator group. Members validate the blocks produced on the Proof Chain and record them on the Main Chain, take part in governance, and manage reward distribution. The Union receives 40% of every minted block reward and 20% of transaction fees. See XPHERE Union.

How do I join the Union?​

Membership is permissioned: each slot requires a 35,000,000 XP stake and is admitted by the Foundation after evaluation. Registration runs in five steps — apply with an initial 1,000,000 XP stake, evaluation by the Foundation and existing members, stake the remaining 34,000,000 XP to complete registration, initial technical support from the Foundation, then ongoing stable operation. Enquiries go to Contact@X-phere.com. See XPHERE Union.

How many Union members are there?​

Read on-chain on 2026-08-05: 25 active slots against a target of 31, held by 12 members, with exactly 35,000,000 XP staked per slot. Slot counts change — check the current state on the Tamsa Explorer, XPScan, or the public API https://api.tamsa.io/api/v1/unions?page=1&count=100. See Members.

Development​

Where do I start as a developer?​

Developer Quickstart — deploys your first contract in 10 minutes.

Does Hardhat work?​

Yes. Just add XPHERE as a network in hardhat.config.ts. See Smart Contracts.

Is there a public RPC?​

Yes — see Public RPC Endpoints. For production, run your own Endpoint Node.

Can I subscribe to events via WebSocket?​

Yes. wss://rpc.x-phere.com/ws (mainnet) and wss://testnet.x-phere.com/ws/ (testnet — note the trailing slash; the path without it answers 301 to /ws/, which not every WebSocket client follows).

Ecosystem​

Is there a grant program?​

Yes — the XPHERE Grant Program supports builders, developers, and teams launching dApps, building infrastructure, or growing the community. Applications are reviewed on a rolling basis, and selected applicants are contacted within 14 business days. Grant amounts, tiers, and milestone structures have not been published. See Grant Program.

Nodes​

What's the difference between Endpoint Node, Validator Node, and Mining Node?​

  • Endpoint Node (XEN) — Read-only JSON-RPC interface. Anyone can run one.
  • Validator Node — Main Chain PBFT consensus participant. Permissioned: run by admitted Union members.
  • Mining Node — Proof Chain miner, running the IceRiver XP0 xpHash ASIC. Anyone can run one for rewards.

See Node Guide.

Do I need to re-sync after the xpHash fork?​

No. The fork is in-place; existing chaindata remains valid. See xpHash Fork — Node Operators.

How are network upgrades announced?​

Upgrades activate at a deterministic block height, announced on the official channels — Telegram, X, Discord, and GitHub releases — and reflected in these docs. The Foundation has not published a fixed advance-notice period or upgrade calendar, so act on the announcement itself rather than an assumed notice window. See Network Upgrades.

Security​

Has XPHERE been audited?​

Yes. The Main Chain client (xchain, the Layer 1 protocol implementation in Golang) was audited by Hacken and completed on 3 March 2025, with 3 findings. The record is published on Hacken's own site at hacken.io/audits/xphere, so it can be verified independently. See Security → Audits for scope and limitations.

How do I report a vulnerability?​

Email security@x-phere.com with the subject [SECURITY]. Do not open a public GitHub issue or post publicly before a fix exists. See Security for scope, what to include, and the list of verified official domains and contract addresses.

Community​