At a glance
Sui on Paymos
Supported stablecoins
- USDC USD Coin
Confirmation speed
Confirmation depth is network-specific — Paymos tunes it to each chain's finality and shows thresholds where they apply.
Why Sui for crypto payments
Sui is a proof-of-stake Layer-1 with an unusual data model. Each on-chain asset is a typed object owned by an address, not a line in one global balance map. That layout lets independent transfers run in parallel instead of queuing behind shared state, and a USDC transfer typically costs a fraction of a cent. Sui is the right rail when your buyers already hold USDC on Sui specifically — Sui-native DeFi users, consumer apps built on the chain's account primitives, and the cohort that came over from other Move-language ecosystems.
Supported stablecoins on Sui
USDC is the only stablecoin Paymos accepts on Sui — the panel above shows the live set. Tether has not deployed USDT on this chain, so there is no canonical USDT to take here. A buyer who wants to pay in USDT can switch to a network where Tether is issued: Ethereum, Tron, BSC, Polygon, Arbitrum, Optimism, Avalanche, Solana, NEAR, Plasma, or TON.
How confirmations work on Sui
Sui finalizes at the checkpoint level rather than by piling up probabilistic block confirmations — once a transaction lands in a committed checkpoint, the network treats it as settled, usually within a couple of seconds. Paymos does not read Sui's own finality flag here, and it does not vary the wait by ticket size on this chain. The confirmation depth is an operational parameter Paymos tunes to live conditions, not a number we publish; your dashboard shows where each payment stands in real time.
Fees and gas
The customer pays the network fee in SUI, the chain's gas token. A typical USDC transfer runs a fraction of a cent — usually well under $0.01. A wallet holding USDC but no SUI still can't broadcast; it needs a little SUI to cover gas.
Paymos pricing on Sui is 1.0% Standard, with 0.3% Enterprise on request. Acceptance and sweep gas sit inside that fee — no surcharge on either side. On withdrawal Paymos takes 0 commission and subsidises the network cost, so moving USDC to your whitelisted wallet costs less than the chain would charge you directly. That isn't free — the reduced network fee is real — but Paymos earns nothing on the payout, and the 1.0% you paid on acceptance is not re-applied.
Compared to a typical crypto gateway
Most gateways bolt one EVM template onto Sui — an arbitrary block count to wait out, and a shared deposit address that leans on a memo a buyer can forget. Paymos meets Sui on its own terms. Every invoice gets a fresh deposit address derived from BIP-44, so a payment maps to a dedicated object-model account with nothing to tag by hand. Each state change posts a webhook signed with HMAC-SHA256 on the X-Webhook-Signature header, re-sent up to 11 times over roughly 32 hours until it lands, so fulfilment can run before the buyer leaves the success screen. Idempotency rides on the external_order_id you set, so a retried request resolves to the same invoice rather than a duplicate charge.
What we don't do on Sui
We accept USDC on Sui only — no USDT, DAI, USD1, or XAUT, since none are natively issued here, and we don't take bridge wrappers. USDC in is USDC on your balance: Paymos never swaps it to another token or converts it to fiat, and there's no off-ramp to a bank account inside the product. Refunds are merchant-initiated: you send an outbound transfer yourself, since there's no buyer-facing refund portal. And we don't cover the customer's inbound SUI gas — the sender pays it.
Frequently asked questions
What is Sui's object-centric model?
Sui stores on-chain assets as typed objects owned by addresses, instead of entries in one global balance map. A USDC payment changes the ownership of specific coin objects rather than rewriting two rows in a shared ledger. The practical upshot for a merchant is parallelism: unrelated transfers don't block each other, so the chain clears a high volume of independent payments at once.
Why no USDT on Sui?
Tether never issued USDT on Sui. Anything labelled "USDT on Sui" would be a third-party bridge wrapper, which Paymos does not accept on any chain. For a USDT payment, point the buyer to Tron, Ethereum, BSC, TON, or one of the other networks where Tether is canonical.
Can a customer pay me from a major exchange to Sui?
Yes, where the exchange lists Sui as a USDC withdrawal network — Coinbase and several others do. The buyer selects Sui at the withdrawal step, and the funds land on the per-invoice address Paymos generated for that payment.
What gas token does Sui use?
SUI, the chain's native token. A customer paying USDC on Sui needs a small SUI balance — typically a few cents' worth — to cover the network fee on the transfer.
Has Sui ever had a chain outage?
Yes, more than once. Sui's mainnet launched in May 2023 and ran without a major halt until 21 November 2024, when a transaction-scheduling bug crashed validators and stopped block production for about two hours. A network stall took the chain down for nearly six hours on 14 January 2026, and back-to-back upgrade bugs caused two further multi-hour halts on 30–31 May 2026. Paymos doesn't bet on any chain staying up: if Sui stops committing checkpoints, the scanner stops advancing and a payment reads as pending — never as settled off a halted chain — then resumes once the network recovers.
Should I enable Sui if I'm not specifically targeting Sui users?
There's no cost to leave it on, and buyers self-select the network they hold funds on. If your payment analytics show no Sui traffic, the upside is thin. If they show even a small Sui-native slice, switching it on captures that flow without any ongoing work on your side.