Sui shipped gasless stablecoin transfers in v1.72.2. The feature enables at protocol version 125. This release is version 124.
Sui's Address Balances model is a real architectural fix for wallet developers. The gasless stablecoin feature that ships alongside it isn't active on mainnet yet, and the release notes tell you exactly why.
CryptoVibe Desk · sui · gas-abstraction · stablecoins
- →Sui published v1.72.2 on May 20, adding Address Balances and gasless stablecoin transfers for seven assets including USDC, with a $0.01 minimum per transfer.
- →Address Balances adds a canonical balance view on top of Sui's Coin object model, removing the coin-selection logic that wallet and DEX teams have managed manually since mainnet launch.
- →Watch for Sui's protocol version 125 epoch transition before end of June 2026: that is when gasless transfers go live, not at the v1.72.2 release.
- Coin<T> object model → Sui's way of storing tokens: each token is a separate on-chain object with its own ID rather than a number in a shared ledger, which means sending tokens requires selecting and combining the right objects.
- Protocol version → A number that controls which features are active on the Sui network; validators must upgrade to a new binary before the version increments and new features turn on.
- ERC-4337 → Ethereum's account abstraction standard, which lets a third party pay transaction fees on your behalf so you don't need to hold the native token to send assets.
Sui's v1.72.2 release ships two features under one announcement: Address Balances and gasless stablecoin transfers. Both are real. Only one is active on mainnet as of the May 20 release.
Sui's existing token model treats every coin as a distinct on-chain object. Your USDC isn't a balance entry: it's one or more Coin<T> objects, each with its own object ID. Sending tokens means selecting which objects to use, splitting them if the amounts don't match, and merging the leftover. Wallet teams and DEX integrations have been writing that coin-selection logic manually since mainnet launched. It's the source of most 'why did my transfer fail' support tickets on Sui.
Address Balances adds a canonical per-address balance view on top of the object model. The objects don't go away. You get a clean integer balance per asset per address alongside them. If you've debugged a cache invalidation problem, this is the same shape.
Sui's object model is precise but verbose for reads. Address Balances caches the aggregated balance so your app doesn't walk the entire object graph on every render. The release notes describe this as 'reducing the need for coin selection, splitting, and merging.' That's underselling it. This is the abstraction layer that should have shipped at launch.
The gasless transfer feature is the more visible change. On most chains, every transaction costs gas in the native token. Hold only USDC on Ethereum and you still need ETH to move it.
Sui's gasless model removes that requirement for supported stablecoin sends. The release notes list seven stablecoins on the mainnet allowlist: USDC, USDSUI, SUI_USDE, USDY, FDUSD, AUSD, and USDB. Minimum transfer is $0.01 per stablecoin.
Someone still pays the gas. Mysten's model routes fees through a sponsored transaction layer. It uses the same architecture as Ethereum's ERC-4337 paymasters, built into the L1 rather than the wallet. The tradeoff is a curated allowlist: seven stablecoins at launch, not arbitrary tokens.
The release notes state that gasless transactions are enabled at protocol version 125. This release ships at protocol version 124. One PR in the release notes explicitly says gasless remained disabled on mainnet pending follow-up configuration. The code is in the binary. The feature is not on.
This is a phased deployment, not a bug. Mysten ships the binary in v1.72.2, validators upgrade, and a follow-up configuration step triggers the transition to protocol 125. Shipping infrastructure in one version and activating it in the next gives validators time to upgrade before the feature turns on. The announcement and the live feature land at different times. That quietly creates a window where integration teams might build against something that isn't there yet.
If you're building stablecoin flows on Sui, check the protocol version first. The activation number is 125. You're on 124. That's the only number that matters right now.
Mysten announced gasless transfers in the same release that carries the code but not the activation. That costs developer teams real debugging hours. The announcement team moved ahead of the deployment team.
Watch for the protocol version 125 epoch transition on Sui mainnet before end of June 2026: if gasless stablecoin transfers aren't active by then, the curated allowlist model is likely being revised before launch.
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