Multi-chain Deposit

Deposit from any major chain in one step and start trading instantly.

Overview

WaterX lets you deposit stablecoins directly from Ethereum, Arbitrum, or Sui — no need to bridge funds to Sui first, and no need to hold a Sui-native stablecoin.

Whatever supported stablecoin you deposit is credited 1:1 as a unified USD balance inside your WaterX account, used as the single balance for trading, providing liquidity, and settlement. Technically, this unified balance is implemented as WaterX USD — see Unified Liquidity & WaterX USD.

Supported Source Chains & Assets

Source Chain	USDC	USDT	Other	Status
Sui (native)	✅	—	USDsui	Live
Ethereum	✅	✅	—	Live
Arbitrum	✅	✅	—	Live
Other EVM chains (Base, BSC, Polygon, Optimism)	—	—	—	Coming soon
Solana / TRON	—	—	—	Planned

More source chains are being added over time. For a chain not yet listed, withdraw to Ethereum, Arbitrum, or Sui via a supported chain or exchange first, then deposit.

Deposit Rules

Item	Rule
Conversion rate	1:1 fixed (1 USDC / USDT = 1 USD balance)
Deposit fee	$0 (no fee)
Minimum deposit	$10 (all source chains)
Source-chain gas	Paid by you (standard transaction gas on the source chain)
Sui-side gas	Sponsored by WaterX (you don't need to hold SUI)

Cross-chain deposits convert at a fixed 1:1 rate — no slippage, no conversion loss. Send 100 USDT on the source chain and your WaterX account receives 100 USD.

How to Deposit

1. Click Deposit to open the deposit window

2. Select the source chain (Sui / Ethereum / Arbitrum)

3. Select the asset (USDC or USDT; on Sui, USDC or USDsui)

4. Enter an amount and confirm the transaction

5. Sign on the source chain

Sui deposits: Near-instant, subject to Sui finality.

Ethereum / Arbitrum deposits: Processed through WaterX's cross-chain messaging layer (see below). Once the source-chain transaction is confirmed, an equal USD balance is minted to your WaterX account.

Cross-chain deposits wait for source-chain block confirmations; arrival time depends on that chain. Once complete, the balance appears directly in your Account Balance.

Always Use the Deposit Flow for Other Chains

Your WaterX account address is a Sui address and can only receive USDC / USDsui on Sui.

To deposit from another chain such as Ethereum or Arbitrum, you must use the multi-chain deposit flow in the WaterX frontend — it handles the cross-chain messaging and mints your USD balance on Sui.

Do not send assets from another chain directly to your WaterX account address. Funds sent directly from an unsupported chain or network cannot be credited and may be permanently lost.

Cross-Chain Security

WaterX's cross-chain messaging layer is built on Wormhole's Core Bridge infrastructure, inheriting its decentralized verification model secured by 19 Guardians. On top of this, WaterX controls the USD-balance minting logic itself and adds protocol-level real-time monitoring (see the NAV monitoring section in Unified Liquidity & WaterX USD).

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WaterX supports direct deposits from Ethereum, Arbitrum, and Sui, credited 1:1 to a unified USD balance with zero deposit fee. To deposit from another chain, always use the frontend multi-chain deposit flow — never transfer directly to your account address. Cross-chain security is built on Wormhole's 19-Guardian model.

Related: Withdrawals · Unified Liquidity & WaterX USD · Account system