KMS Bridge

KMS is the in-game currency you earn by selling resources at the Central Market. It also exists as a real on-chain token. The KMS Bridge is the system that connects the two: it links a crypto wallet to your Kosmaris account and moves KMS between that wallet and your game balance.

On-Chain Deposits and Withdrawals

The bridge carries KMS in both directions between the on-chain token and your in-game balance. A linked wallet is required for either direction.

Deposit (stash in). You send KMS from a wallet to the KMS stash contract. The bridge waits until the network has buried that transaction deeply enough to treat it as settled, then credits the same amount to your in-game balance.

Withdraw (stash out). The game issues a short-lived, one-use signed voucher for the amount you asked for, and reserves that amount from your in-game balance. You submit the withdrawal transaction from your linked wallet and pay the network gas yourself. A voucher you do not use expires, and the reserved amount returns to your in-game balance once the bridge has confirmed on-chain that the voucher was never redeemed. That confirmation is what stops the same KMS existing in two places at once.

Where you see it. The deposit and withdraw panels live on the KMS Bridge Wallet page in the game. They appear once your wallet is linked and the bridge is available in your game. When they are absent, that page says so in plain words rather than leaving you to guess. Treat the game itself as the authority on whether on-chain transfers are open. This page explains how the mechanism works; the wallet page reports the state of it.

Either way, the in-game economy behaves the same: you earn KMS by selling Metal, Carbon, and Hydrogen at the Central Market, and you spend it there.

Official Contract Addresses

KMS lives on Robinhood Chain, chain id 4663. Two contracts matter, and both are published here so that you can check them against what your wallet or explorer shows you.

KMS token

0x117a860274973D4a1D0023C34F02d3757c9BFf52

This address is the KMS token. Any other contract calling itself KMS is not KMS, whatever its name, symbol, or logo claims. KMS was launched through an open launchpad, where anyone can mint a token and label it anything they like, so the contract address is the only thing that separates the real token from an impostor.

Before you buy, hold, or send KMS anywhere, compare the address in front of you against the one above, character by character. Never trust an address pasted into a chat message, a social post, an advert, or a search result. Copy it from this page.

View the token on the block explorer

KMS stash

0x06f6fAb6c1c1799bd52e897Fe2F90201c4aD605e

The stash is the custody contract that deposited KMS goes to, and the contract withdrawals are paid out of. Ordinary play does not require you to handle it: the game fills the destination in for you when you deposit. It is published here for the more technical reader, so that the holdings backing in-game balances can be inspected by anyone.

View the stash on the block explorer

What KMS Is

  • Inside the game, KMS comes from the Central Market: you sell Metal, Carbon, or Hydrogen for KMS, and you buy resources by spending it. The bridge is the other route in and out.
  • KMS is stored on your player account, not on any planet. It is never produced by mines and never appears as loot.
  • KMS is a high-precision token, with the same fractional resolution as Ether. The game handles all arithmetic at full precision; the UI rounds for display.
  • No building, technology, elapsed time, or score total creates KMS. Trades between players move it between accounts without changing the in-game total, and the bridge is the only thing that moves KMS across the boundary between the chain and the game.

You can link a crypto wallet to your Kosmaris account. The link uses a one-time challenge: you sign a message in your wallet to prove ownership of the address. Once linked, your wallet address is associated with your account.

The connect flow supports a range of wallets, including mobile wallets, so you are not limited to a single browser extension and can link and manage your wallet from a phone as easily as from a desktop.

Changing your linked wallet triggers a multi-day timelock. Your existing wallet remains active during the wait; the new one takes over when the timelock expires. This delay protects you if your wallet is ever compromised, because an attacker cannot silently redirect a withdrawal.

The wallet-link challenge expires after a short window. If it times out, start again.

Verifying a Transaction On-Chain

Every KMS transaction hash shown in your KMS history links out to the Robinhood Chain block explorer, so you can independently verify that a transaction really happened on-chain, including its confirmations, the gas paid, and the exact transfer, without taking the game's word for it.

Token Supply

The KMS token has a fixed maximum supply of 1,000,000,000 (1 billion) KMS. This cap is permanent: no additional KMS can ever be minted beyond it. The total supply is set in the deployed smart contract and cannot be changed after deployment. You can read it off the block explorer yourself, at the token address published above.

Security Notes

  • Check any KMS contract address against the token address published above before you buy, sell, or send anything. An impostor token is the likeliest way to lose money here, and the address is what tells the two apart.
  • Never share the details of any signed voucher or challenge message outside of the game UI. These are cryptographic proofs that authorize on-chain actions.
  • The multi-day wallet-change delay exists specifically to block an attacker who gains access to your game account from redirecting a withdrawal before you can react.
  • If you suspect your account is compromised, contact support immediately. The bridge has an administrative pause mechanism for emergencies.

Cross-References