# Overview (https://docs.axelar.dev/its/integrations/sui/intro)
The [Interchain Token Service](https://docs.axelar.dev/llms.mdx/its/overview/content.md) (ITS) runs on [Sui](https://sui.io/) as the Move package [`interchain_token_service`](https://github.com/axelarnetwork/axelar-cgp-sui/tree/v1.2.0/move/interchain_token_service), version 1.2.0 on mainnet and testnet. It sends and receives everything through the [ITS Hub](https://docs.axelar.dev/llms.mdx/its/how-it-works/its-hub/content.md), as [GMP messages](https://docs.axelar.dev/llms.mdx/gmp/integrations/sui/intro/content.md).
Copy this page with **Copy Markdown** at the top and give it to your agent,
with the coin you want to make interchain. The copied page links to the
Markdown of the other pages it refers to, so the agent can read them too.
Review what it writes, and test on testnet before mainnet.
## What you can do [#what-you-can-do]
| You want to | See |
| -------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
| Bring a coin from Sui to other chains, as interchain tokens that ITS deploys | [Register an existing coin](https://docs.axelar.dev/llms.mdx/its/integrations/sui/register-coin/content.md) |
| Connect your coin on Sui to your own token contracts on other chains, either way | [Link custom coins](https://docs.axelar.dev/llms.mdx/its/integrations/sui/link-coin/content.md) |
| Call ITS from your own Move package, e.g. to receive coins with data | [Contract reference](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md) |
## How a transfer works [#how-a-transfer-works]
Sending, in one transaction:
1. `prepare_interchain_transfer` puts the coins, the destination and an optional payload in an `InterchainTransferTicket`, with your [channel](https://docs.axelar.dev/llms.mdx/gmp/integrations/sui/gmp-contracts/content.md#channel) as the sender.
2. `send_interchain_transfer` takes the coins (locks them, or burns them with the coin's `TreasuryCap`) and returns a `MessageTicket` for the ITS Hub.
3. The transaction pays gas for the ticket (`pay_gas`) and sends it (`send_message`), as for any [GMP message](https://docs.axelar.dev/llms.mdx/gmp/integrations/sui/gmp-messages/content.md#send-a-message).
Receiving: the ITS Hub forwards the transfer, and Axelar's relayer calls `receive_interchain_transfer` on Sui ITS, which unlocks or mints the coins and sends them to the destination address. A transfer with data goes to a Move package instead; see [Receive coins with data](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md#receive-coins-with-data).
Every call that goes to another chain (a transfer, a remote deployment, a link, a metadata registration) returns a `MessageTicket` that you pay gas for and send in the same way. Estimate the fee as described in [Estimate ITS fees](https://docs.axelar.dev/llms.mdx/gmp/gas/estimate-and-pay/content.md#estimate-its-fees). [Express](https://docs.axelar.dev/llms.mdx/gmp/integrations/evm/express/content.md) currently doesn't work for ITS transfers.
## Addresses [#addresses]
| | Mainnet | Testnet |
| ----------------------------------- | -------------------------------------------------------------------- | -------------------------------------------------------------------- |
| Chain name | `sui` | `sui` |
| ITS package, to call | `0xbaec6524bedbc95fa4c3314271ecf5d2ce7d8a602c8413c03a5264c949c7263d` | `0x0f9fb8246525699ac7e0a9742094f3491e20b0f3b2a5faf503f139df383390f0` |
| ITS original package, in type names | `0xc3c0222e59c9d3b34ab804840e271ef9a0e6f0adcc280133c9db9b9e060887ca` | `0xe7818984af6b3e322a6d999ca291a125fc3f82e13e5e6d9affc3a712f96bc7ce` |
| `InterchainTokenService` object | `0xef0d515e2f6be9199150e63758035bca7b1e016dcc1a93cec123abb35880b379` | `0x55fcd94e5293ff04c512a23c835d79b75e52611f66496e2d02cca439b84fa73c` |
| ITS channel (its address on Axelar) | `0x43f65158c85e1bc1e27a4a1ecc49a0089283051c04b4bb21a69bbbe06078c2f8` | `0xae0eaa7d1f1ddfba704f87391380b932b0e8a1e778bc70355dba7d3b1add0119` |
The gateway and gas service are on the [GMP Sui overview](https://docs.axelar.dev/llms.mdx/gmp/integrations/sui/intro/content.md#addresses). The current IDs are always in the deployment configs, under `chains.sui.contracts.InterchainTokenService`: [mainnet](https://github.com/axelarnetwork/axelar-contract-deployments/blob/main/axelar-chains-config/info/mainnet.json) | [testnet](https://github.com/axelarnetwork/axelar-contract-deployments/blob/main/axelar-chains-config/info/testnet.json).
ITS was upgraded in place, so it has two packages. Call functions on the
latest one, e.g. `::interchain_token_service::link_coin`: the
original package's functions are disabled, and calls to them abort. A type
keeps the ID of the package that first defined it: most have the original
package's, e.g. `::token_id::TokenId`, and those added
in the upgrade, such as `TreasuryCapReclaimer` and `TokenManagerType`, have
the latest one.
## Setup [#setup]
You need:
* The [Sui CLI](https://docs.sui.io/guides/developer/getting-started/sui-install). The commands on these pages were tested with version 1.83.
* A testnet address with SUI: `sui client faucet`, or see [Get SUI tokens](https://docs.sui.io/guides/developer/getting-started/get-coins).
The guides call ITS with [programmable transactions](https://docs.sui.io/concepts/transactions/prog-txn-blocks) (`sui client ptb`), so they don't need a Move dependency on ITS. To call ITS from your own package, see [Depend on ITS](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md#depend-on-its).
## Sui specifics [#sui-specifics]
* **Coin management.** On Sui, ITS keeps each coin's token manager inside its own object, as a `CoinManagement`. You create it before registering the coin: with the coin's `TreasuryCap` for mint and burn (`new_with_cap`), or without for lock and unlock (`new_locked`). See [Token managers](https://docs.axelar.dev/llms.mdx/its/how-it-works/concepts/content.md#token-managers).
* **Token IDs.** Sui derives token IDs differently from EVM chains: from the coin's type and details for a canonical coin, and from a channel and a salt for a custom coin. They're the same on every chain once registered. See [Token IDs](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md#token-ids).
* **Channels as identity.** Sui has no `msg.sender`. The sender of a transfer, the deployer of a custom coin and the holders of roles are [channels](https://docs.axelar.dev/llms.mdx/gmp/integrations/sui/gmp-contracts/content.md#channel), identified by their object IDs.
* **Decimals and amounts.** Sui amounts are `u64`. When an interchain token is deployed to Sui from a chain with larger amounts, such as an EVM chain, the ITS Hub gives it at most 6 decimals on Sui, and scales amounts between the chains, rounding down. A transfer whose amount would round to zero, or not fit in a `u64`, fails at the hub.
* **Flow limits and roles** work differently from EVM chains: see [Roles](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md#roles) and [Flow limits](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md#flow-limits).
## Next steps [#next-steps]
* [Register an existing coin](https://docs.axelar.dev/llms.mdx/its/integrations/sui/register-coin/content.md) and send it to another chain.
* [Link custom coins](https://docs.axelar.dev/llms.mdx/its/integrations/sui/link-coin/content.md) between Sui and other chains.
* [Contract reference](https://docs.axelar.dev/llms.mdx/its/integrations/sui/its-contracts/content.md): functions, roles, flow limits, events.
## Resources [#resources]
* [axelar-cgp-sui](https://github.com/axelarnetwork/axelar-cgp-sui): source code of Axelar's Sui packages, with [generated docs](https://axelarnetwork.github.io/axelar-cgp-sui/).
* [`sui/its.js`](https://github.com/axelarnetwork/axelar-contract-deployments/blob/main/sui/its.js): the script Axelar uses to register, link and transfer coins on Sui.
* [GMP on Sui](https://docs.axelar.dev/llms.mdx/gmp/integrations/sui/intro/content.md): gateway, gas service, channels and relayer discovery.
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All pages of these docs, as Markdown: https://docs.axelar.dev/llms.txt