Sui questions, answered

Sui is a proof-of-stake layer 1 blockchain built by Mysten Labs. Smart contracts are written in Sui Move, and all onchain data is stored as objects.

Sui stores state as versioned objects. Validators order transactions with Mysticeti DAG consensus, execute them in parallel, and seal results in checkpoints.

Sui runs DeFi, games, NFTs, payments and consumer apps, plus services like Walrus storage, SuiNS names and zkLogin. Its object model fits asset-heavy apps.

Sui is a name, not an acronym. It's usually pronounced "swee", like "sweet" without the t, and is widely said to come from the Japanese word for water.

Mysten Labs created Sui. It was founded in 2021 by Evan Cheng, Sam Blackshear, George Danezis, Kostas Chalkias and Adeniyi Abiodun. Mainnet launched in May 2023.

SUI pays gas for computation and storage, is staked with validators to secure the network, works as a liquid asset in apps, and carries governance votes.

SUI has a fixed total supply of 10,000,000,000 SUI, all minted at genesis. Circulating supply is lower and grows as tokens unlock on a published schedule.

SUI has a fixed 10 billion supply. Stakers earn gas fees plus a subsidy that falls 10% every 90 epochs, and storage fees go to a storage fund that earns stake.

Gas on Sui is a fee in SUI. You pay computation units times the gas price plus storage units times the storage price, minus a rebate for any storage you free.

The storage fund holds the fees users pay to store data and earns stake rewards for validators. Deleting data refunds nearly all that fee as a storage rebate.

No. Sui does not run the EVM or Solidity. Contracts are written in Move and run on the Move VM, though assets can be bridged from Ethereum.

Sui uses Move and an object model where each object has an owner. Solana uses Rust programs that act on accounts. Fees, parallelism and tokens differ too.

Both use Move, but Sui stores data as owned objects while Aptos keeps resources under accounts, which changes contract design, parallelism and transactions.

On Sui you write Move instead of Solidity, store state in owned or shared objects instead of contract storage, and compose many calls in one PTB.

Sui transactions typically reach finality in 400–700 ms end to end, from submission to certified effects. Location and network load affect the exact time.

Check status.sui.io, then confirm new checkpoints are being produced on-chain. If they are, the problem is likely your RPC provider or wallet.

Sui uses Mysticeti, a DAG-based Byzantine fault tolerant consensus protocol, run by a delegated proof-of-stake validator set that changes each epoch.

Mysticeti is Sui's DAG-based consensus protocol. It commits in three message rounds and replaced Narwhal and Bullshark on mainnet in July 2024.

An epoch is a period when Sui's validator set, gas price and protocol version stay fixed. It lasts about 24 hours on mainnet and testnet, an hour on devnet.

A checkpoint is a certified, hash-linked batch of executed Sui transactions signed by over 2/3 of validators, used for syncing and indexing.

Sui mainnet had 125 active validators as of epoch 1291 (25 October 2026). The protocol caps the set at 150, and the count can change at each epoch boundary.

Run a validator node, register with sui validator become-candidate, attract stake worth 3 voting power (0.03% of total), then run sui validator join-committee.

You delegate SUI to a validator's staking pool and get a StakedSui object you keep custody of. The stake activates next epoch and earns rewards each full epoch.

Each epoch, gas fees plus the stake subsidy are split among validators by voting power. After commission, the rest raises the pool's exchange rate, compounding.

Call request_withdraw_stake with your StakedSui object. Principal and rewards come back as SUI in the same transaction, with no unbonding period.

Run sui-node with fullnode.yaml and the genesis.blob for your network, restored from a snapshot, on 8 cores (16 vCPUs), 128 GB RAM and a 4 TB NVMe disk.

A Sui address is 32 bytes written as 0x plus 64 hex characters, such as 0xc88e…026e. Short forms like 0x2 are zero-padded on the left to the full length.

A Sui address is BLAKE2b-256 of a scheme flag byte plus the public key (0x00 Ed25519, 0x01 secp256k1, 0x02 secp256r1). Wallets derive keys via m/44'/784'.

Slush is Mysten Labs' official Sui wallet. Suiet and Nightly support Sui, as does Ledger Live for hardware. Phantom dropped Sui on 24 September 2026.

Yes. In April 2025 Mysten Labs merged Sui Wallet and the Stashed web wallet into Slush. Addresses, accounts and recovery phrases stayed the same.