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Module 06 of 07

Using LiteForge

Add chain 4441, fund a wallet from the faucet, read the explorer, and move through the live app directory safely.

8 min read, then 10 questions

This is the module where you stop reading about LitVM and start using it. LiteForge is the public testnet, live since April 2026. Everything here is free, nothing has monetary value, and the wallet you use should reflect both facts.

Network parameters

ParameterValue
Network nameLitVM LiteForge
Chain ID4441
Currency symbolzkLTC
RPC, HTTPhttps://liteforge.rpc.caldera.xyz/http
RPC, WebSocketwss://liteforge.rpc.caldera.xyz/ws
Block explorerhttps://liteforge.explorer.caldera.xyz
Rollup stackArbitrum Orbit
Data layerAnyTrust
EVM versionShanghai
Effective gas limit32,000,000 per block
Block timeVariable, produced on demand

Chain ID 4441 is the number to memorise. It is how your wallet, your scripts, and your deployment config all identify the network, and a mismatch is the most common cause of a transaction that goes nowhere.

Adding the network

The fast path: open testnet.litvm.com, click Add LitVM to Wallet, approve the prompt. This works with MetaMask, Rabby, Coinbase Wallet, Rainbow, OKX, Trust Wallet, and anything WalletConnect compatible.

ChainList also carries the network: search LitVM at chainlist.org and add it from there.

If both fail, add it by hand. In MetaMask that is the network dropdown, Add Network, then Add a network manually, and the values from the table above. Rabby is Settings, Custom Networks, Add Network. Trust Wallet and Coinbase Wallet both have an Add Custom Network entry under network settings.

Getting zkLTC from the faucet

You need zkLTC to pay gas. Testnet zkLTC comes from the Caldera Hub faucet at liteforge.hub.caldera.xyz, reachable through the Get zkLTC button on the testnet hub.

Connect the wallet, request tokens, and they arrive in roughly thirty seconds.

If the faucet errors, the cause is almost always rate limiting rather than an outage. Caldera restricts VPN and proxy traffic. Pause the VPN, switch region, or wait a few minutes and retry.

Reading the explorer

The block explorer at liteforge.explorer.caldera.xyz is a Blockscout instance. Four things are worth knowing how to do.

  1. 01

    Check a transaction

    Paste the hash into search. Status tells you success or revert, and a reverted transaction still consumed gas. The revert reason, when the contract provides one, is usually the fastest debugging tool you have.

  2. 02

    Inspect an address

    Search any address to see balance, transaction history, and token holdings. For contracts you also get the code tab, and verified contracts show readable source alongside a read and write interface.

  3. 03

    Read block numbers carefully

    The explorer shows LitVM block numbers. Inside a contract, block.number returns an approximate Ethereum L1 block number instead. Module seven explains why.

  4. 04

    Interact without a frontend

    On a verified contract, the Read Contract and Write Contract tabs let you call functions directly with a connected wallet. This is the quickest way to test a deployment.

Network health lives separately, at liteforge.betteruptime.com. Check it before assuming your code is broken.

Moving assets in

Two bridges, two purposes, both covered in earlier modules.

From Litecoin

  • BitcoinOS Grail bridge
  • LTC becomes zkLTC at a one to one ratio
  • Trustless, no custodian, ZK verified
  • The path for Litecoin holders

From Ethereum

  • Arbitrum Bridge
  • ETH, USDC, USDT, and other ERC-20s
  • Standard rollup bridge contracts
  • The path for EVM liquidity

If a bridge transfer stalls: for Grail, confirm you had enough LTC to cover mainchain fees and wait for sufficient confirmations. For the Arbitrum Bridge, confirm the Ethereum side actually confirmed and wait out the standard period. Beyond an hour, ask in the Telegram group.

The ecosystem, and how to walk into it safely

Over eighty applications are live on LiteForge, listed by category on testnet.litvm.com. Infrastructure, DEXs, lending, launchpads, NFT platforms, prediction markets, AI agents, games, payments, analytics.

The categories worth exploring first, because they teach you the most about how the chain behaves:

  • A DEX, to see swaps, liquidity provision, and how gas is actually priced.
  • An NFT platform, to watch a mint transaction and inspect the resulting token on the explorer.
  • An analytics tool, to see aggregate network activity rather than just your own.

The project's own disclaimer applies throughout: LitVM does not endorse these applications, many are unaudited, and a fresh wallet is the correct precaution.

The Litecoin Vanguard Collective

Announced in April 2026, the LVC is the community hub coordinating the wider Litecoin ecosystem: community members, miners, builders, merchants, enterprises, and developers.

Founding organisations are LitVM, the Litecoin Foundation, and Luxxfolio. The stated method is organise, mobilise, advance, and the venue is a Discord server with monthly calls and town halls. Hackathon submissions and developer support run through the same server.

When something goes wrong

SymptomFirst thing to check
Network not foundChain ID is exactly 4441, no stray spaces in the RPC URL
Transaction stuckzkLTC balance is above zero; try raising the gas limit
Wrong networkWallet is on LiteForge, not another chain with a similar name
RPC connection failsCorporate firewall or VPN; try another network or region
Faucet errorsVPN or proxy rate limiting; pause it and retry

What to remember

  • 01LiteForge is LitVM's public testnet, live since April 2026, running Arbitrum Orbit with an AnyTrust data layer.
  • 02Chain ID 4441, currency zkLTC, RPC at liteforge.rpc.caldera.xyz/http.
  • 03Add the network via testnet.litvm.com, ChainList, or manually with the published parameters.
  • 04The Caldera Hub faucet supplies testnet zkLTC and rate limits VPN and proxy traffic.
  • 05Testnet zkLTC has no monetary value and cannot be bridged to real LTC.
  • 06The explorer is a Blockscout instance where you can check transactions, inspect addresses, and call verified contracts directly.
  • 07Over eighty apps are live, none endorsed or audited by LitVM, so use a fresh wallet.
  • 08The Litecoin Vanguard Collective, founded by LitVM, the Litecoin Foundation, and Luxxfolio, is the community coordination hub.

Primary sources

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