View Balances

The Home screen shows your XTZ and USDC balances on Tezos X Previewnet, with quick access to Send and the faucet.

Displayed assets

Asset	Source	Unit
XTZ	Michelson runtime RPC, queried on your tz1 address	XTZ (mutez → XTZ, 6 decimals)
USDC	ERC-20 balanceOf on the EVM-side USDC contract, queried on your EVM alias	USDC (6 decimals)

The balance fetch is triggered automatically when the Home screen mounts, and can be refreshed manually with the ↺ button.

Why XTZ is read from the tz1, not from the EVM alias

On Tezos X, an EVM alias is not a native EOA — it's a synthetic identity that the kernel creates on the EVM runtime to represent a tz1 (or other Tezos account). Crucially, the kernel ships an AliasForwarder : any XTZ that ends up on a 0x alias is automatically forwarded back to the alias's tz1 of origin.

In other words, eth_getBalance(alias) is structurally always 0 for an alias of one of your accounts. Your XTZ lives on the tz1, period. The wallet therefore queries:

GET https://michelson.previewnet.tezosx.nomadic-labs.com/chains/main/blocks/head/context/contracts/{tz1}/balance

and treats the returned mutez as the canonical XTZ balance. There is no second L2 row — showing one would be misleading because it would always read zero, and the user would think their cross-runtime transfer didn't arrive when in fact the kernel routed it back to the tz1 by design.

fetchXtzBalance(evmAddr) is still exported by lib/balances.ts for diagnostic purposes (and for a future Activity page if needed), but is not consumed by Home.

How balances are fetched

XTZ balance (Michelson runtime)

// packages/wallet/src/lib/balances.ts
const res = await fetch(
  `${TEZOS_L1_RPC}/chains/main/blocks/head/context/contracts/${tz1}/balance`,
);
const mutezString = await res.json();   // e.g. "1234000000"

The mutez decimal is converted to XTZ for display:

XTZ = mutez / 10^6

The Home dashboard caps the displayed value at 2 decimal places to keep large balances readable.

USDC balance (EVM runtime)

The wallet calls balanceOf(address) on the USDC contract via eth_call, using the EVM alias as the holder:

const data =
  '0x70a08231' +                                   // balanceOf(address) selector
  evmAlias.slice(2).padStart(64, '0');             // 32-byte ABI-encoded address

const raw = await tezlink.call(
  { to: USDC_CONTRACT, data },
  'latest',
);
// raw is a hex-encoded uint256 ; divide by 10^6 for USDC display

Unlike XTZ, ERC-20 USDC does live on the EVM alias — AliasForwarder only intercepts native value transfers, not contract-level token balances.

Getting Previewnet funds

The wallet links to an external USDC faucet for Tezos X Previewnet via the Faucet button on the Home screen.

For XTZ, request funds in the Tezos X developer channels or via the Nomadic Labs internal Previewnet faucet — anything sent to your tz1 is what counts.

Addresses shown in the header

The Header displays both your addresses with copy-to-clipboard buttons:

• tz1… — your Michelson runtime address. The signing key. The XTZ holder.
• 0x… — your EVM alias. The identity dApps see, the holder for ERC-20 tokens.

Both are truncated to addr(0,6)…addr(-4) format (e.g. tz1aBc…xYz1).