OP Mainnet (Optimism) → Arbitrum One: How to Move USDC and USDT

Routes OP Mainnet (Optimism) → Arbitrum One

Blockchain	Direction	Rate	Minimum
OP Mainnet (Optimism)	USDC Optimism → USDC Arbitrum	1 USDC Optimism = 1.001 USDC Arbitrum	100.67 USDC Optimism
OP Mainnet (Optimism)	USDT Optimism → USDT Arbitrum	1 USDT Optimism = 1.001 USDT Arbitrum	100.67 USDT Optimism
OP Mainnet (Optimism)	USDC Optimism → USDT Arbitrum	1 USDC Optimism = 1.001 USDT Arbitrum	100.67 USDC Optimism
OP Mainnet (Optimism)	USDT Optimism → USDC Arbitrum	1 USDT Optimism = 0.998991 USDC Arbitrum	100.67 USDT Optimism

Compared: OP Mainnet (Optimism) and Arbitrum One

	OP Mainnet (Optimism)	Arbitrum One
What kind of network	Optimistic rollup (L2)	Optimistic rollup (L2)
What pays the fee	ETH	ETH
How expensive	low	low
How fast	fast	fast
Block time	~2 sec	~0.25 sec
Address format	0x…	0x…
Memo or tag needed	not required	not required
Ethereum-format address (0x…)	yes	yes
Withdrawal to Ethereum through the official bridge	≈ 7 days — the challenge window runs	≈ 7 days — the challenge window runs

The cost and speed marks are given against each other: both drift with the load on the network.

How an exchange differs from an ordinary bridge

	Velorex	Ordinary bridge
What arrives at the address	Native ETH or standard tokens of the Arbitrum One network	It varies: a number of networks hand out the bridged version of the token
Wallet connection and signatures	We do without them: the payout goes to the address from the order	Mandatory: the wallet is connected, contract transactions are signed
Is a Arbitrum One coin needed for fees	Not required to receive	As a rule yes, otherwise the funds cannot be claimed or moved on
When it arrives	As soon as OP Mainnet (Optimism) gathers confirmations; the status is shown on the order page	Set by the bridge itself and by the load on both networks
Who holds the funds on the way	Velorex — until the order is closed by the payout	The smart contract of the bridge or its validators

How to make the move from OP Mainnet (Optimism) to Arbitrum One

Find the route you need in the table above and work the amount out with the calculator on its page.
Enter an address that belongs to the Arbitrum One network (0x…).
Send the coins over the OP Mainnet (Optimism) network to the details in the order — the amount has to match down to the last digit.
When OP Mainnet (Optimism) gathers confirmations, automation sends the coins to your address in Arbitrum One. The status is visible on the order page.

Check before sending to Arbitrum One

Take the receiving address only from the Arbitrum One network (0x…).
Ethereum, Arbitrum, Optimism, BNB Smart Chain and Polygon addresses look the same (0x…) — make sure the wallet is switched to Arbitrum One.
Send the coins over the OP Mainnet (Optimism) network only: from another network they never reach the order.
Send exactly the amount stated in the order: the automation matches your payment against it, and any difference sends the order back for recalculation.

Questions about the OP Mainnet (Optimism) → Arbitrum One pairing

How do coins get from OP Mainnet (Optimism) to Arbitrum One?

Through an exchange order: you send coins over OP Mainnet (Optimism), and USDC and USDT are credited to your address in Arbitrum One. No bridge contracts, no wallet connection and no wrappers.

What can be carried from OP Mainnet (Optimism) to Arbitrum One?

Available: USDC and USDT. Rates and minimum amounts are collected in the table above.

How fast is a transfer from OP Mainnet (Optimism) to Arbitrum One?

First OP Mainnet (Optimism) gathers confirmations, then the payout leaves for Arbitrum One. The final time is dictated by the load on both networks. One OP Mainnet (Optimism) block takes about 2 sec.

What pays the fee in Arbitrum One?

The ETH coin. Holding it is not required to receive funds — it is only needed at the moment you send them on yourself.

Which address suits Arbitrum One?

Only one from the Arbitrum One network, of the form 0x… A familiar Ethereum-format address (0x…) will do — all that matters is that Arbitrum One is selected in the wallet.