Publishing, Deploying & Local Network

MCP tool: When available in your environment, also query the Sui documentation MCP server (https://sui.mcp.kapa.ai) for up-to-date answers. Use it for verification and for details not covered by these reference files.

Source constraint: All information sourced exclusively from docs.sui.io and MystenLabs/sui-stack-hello-world.

Publishing a package

Canonical hello-world publish flow

For the full-stack starter, publish the existing hello-world package only:

cd sui-stack-hello-world/move/hello-world
sui move build
sui client publish

Use the package ID from the publish output to update sui-stack-hello-world/ui/src/constants.ts (TESTNET_HELLO_WORLD_PACKAGE_ID). Do not publish a separate counter package, and do not create a second project directory.

Pre-publish checklist

1. Verify your active environment: sui client active-env
2. Verify you have SUI tokens: sui client balance
3. Build successfully: sui move build

Publish

sui client publish

This deploys the package to the active network and returns:

• A unique package ID (use this for all future interactions)
• An UpgradeCap object (sent to your address, controls future upgrades)
• Object IDs for anything created during init functions

Test publishing (ephemeral networks)

Use sui client test-publish to publish a package to an ephemeral environment for testing without persisting state to a real network:

sui client test-publish

This publishes the package, runs init functions, and returns the same output as sui client publish (package ID, UpgradeCap, created objects), but the deployment is not permanent. Use it to:

• Verify that init functions execute correctly before committing to a real publish
• Test publish + upgrade flows in CI without consuming Testnet/Devnet resources
• Validate gas costs and object creation before a Mainnet deploy

test-publish respects --build-env for multi-environment packages:

sui client test-publish --build-env testnet

After publishing

The publish transaction output lists the package ID under the created objects section (alongside the UpgradeCap and any objects created by init functions). The published-at field is also automatically added to your Published.toml. To interact with the published package:

# Call a function
sui client call --package <PACKAGE_ID> --module greeting --function new

# Query an object
sui client object <OBJECT_ID>

"Your package is already published" error

If you see this error when running sui client publish, it means Published.toml already has an entry for your active environment. This happens when iterating on a package during development.

• To publish to a different network, switch environments with sui client switch --env <ENV> and run sui client publish again. The toolchain tracks published addresses per environment in Published.toml automatically — do not delete Published.toml.
• To upgrade the existing package on the same network, use sui client upgrade (see below).

Upgrading a published package

Published packages are immutable, but you can upgrade by publishing a new version linked to the original. The UpgradeCap object controls upgrade authority. Important: you can restrict the UpgradeCap in the same PTB as the publish command — for example, publishing and immediately calling sui::package::only_additive_upgrades in one atomic transaction. You can also destroy it entirely to make the package permanently immutable (see upgrade policies below).

sui client upgrade --upgrade-capability <CAP_ID>

Finding your UpgradeCap

The UpgradeCap object ID is needed for every upgrade. There are several ways to find it:

1. Published.toml (preferred): After publishing, the toolchain records the cap ID in Published.toml under the upgrade-capability field for each environment.
2. Query owned objects: List all UpgradeCap objects owned by the publish address:

   sui client objects --type 0x2::package::UpgradeCap
   

3. Publish transaction output: The original sui client publish output includes the UpgradeCap object ID in the created objects list.
4. Explorer: Search for your address on SuiVision (suivision.xyz) or Suiscan (suiscan.xyz) and filter owned objects by type 0x2::package::UpgradeCap.

Upgrade policies

Upgrade policies restrict what can change:

• Compatible (default): The most permissive policy. See detailed rules below.
• Additive: New modules can be added, but existing modules cannot change at all.
• Dependency-only: Only dependency versions can be updated. No code changes.

Restricting the UpgradeCap in the same PTB as publish: You can restrict the UpgradeCap in the same programmable transaction block as the publish command itself — for example, calling sui::package::only_additive_upgrades on the UpgradeCap immediately after publishing, all within a single atomic transaction. This is the recommended approach for locking down upgrade policy from the start. Once restricted, you cannot widen the policy.

Other UpgradeCap options:

• Transfer to a multisig address for shared upgrade governance.
• Destroy the UpgradeCap to make the package permanently immutable. Call sui::package::make_immutable, which consumes and destroys the UpgradeCap object. Once the cap is destroyed, no one can ever upgrade the package again — this is irreversible.

Compatible upgrade rules (detailed)

Under the compatible policy, these changes are allowed:

• Add new functions (public or private)
• Add new modules
• Change function implementations (body)
• Add new struct types
• Change private/friend function signatures

These changes break compatibility and will be rejected:

• Remove or rename an existing module
• Remove or rename a public function
• Change a public function's signature (parameters, return types, type parameters)
• Remove, rename, or reorder struct fields
• Change the type of a struct field
• Add or remove struct abilities (key, store, copy, drop)
• Remove a struct type entirely
• Change a struct's type parameters

Before upgrading, review your diff against these rules. The sui client upgrade command will reject incompatible changes at build time with a descriptive error.

Type anchoring after upgrades

Struct types are permanently anchored to the original package ID where they were first published. After an upgrade, the new package gets a new ID, but all objects created by the upgraded code still have their type rooted in the original package ID.

This has critical implications:

• Querying objects by type (e.g., listOwnedObjects with a type filter) must use the original package ID.
• Calling functions via moveCall must use the upgraded (latest) package ID.
• Frontend apps should maintain both IDs: ORIGINAL_PACKAGE_ID for type queries and PACKAGE_ID for function calls.

// Original publish → package ID 0x1234...
// After upgrade  → package ID 0x5678...

// Query: use ORIGINAL package ID
client.core.listOwnedObjects({
  owner: addr,
  type: '0x1234...::module::MyObject',  // ✅ original ID
});

// Call: use UPGRADED package ID
tx.moveCall({
  target: '0x5678...::module::my_function',  // ✅ upgraded ID
});

Publishing to multiple networks

To publish to a different network (for example, from Testnet to Devnet), switch environments and publish again. Each network gives the package a different ID. The Published.toml file tracks published addresses per environment.

Before publishing to a new network, ensure you have tokens for that network:

• Testnet: Free tokens through the web faucet at faucet.sui.io, Discord (!faucet <ADDRESS> in #testnet-faucet), or the TypeScript SDK (requestSuiFromFaucetV2()). sui client faucet does not work on Testnet.
• Devnet: Free tokens via sui client faucet, the web faucet at faucet.sui.io, Discord (!faucet <ADDRESS> in #devnet-faucet), or the TypeScript SDK.
• Localnet: Free tokens via sui client faucet or the local faucet at 127.0.0.1:5003/gas or 127.0.0.1:9123/gas (started with sui start --with-faucet --force-regenesis).
• Mainnet: SUI tokens with real monetary value. Acquire through exchanges or transfers. No faucet available.

Serializing for external signing

To generate transaction bytes for signing by another party (for example, a multisig):

sui client publish --serialize-output

This outputs base64 transaction bytes instead of executing.

Local network (localnet)

Localnet runs a full Sui network on your machine for offline development and rapid iteration. Start it with:

sui start --with-faucet --force-regenesis

The --force-regenesis flag resets all on-chain state each time the network starts, giving you a clean environment on every restart. The --with-faucet flag starts a local faucet so you can fund addresses.

To connect the CLI to your localnet:

sui client switch --env localnet

Get local tokens via sui client faucet or by hitting the local faucet endpoint directly at 127.0.0.1:5003/gas or 127.0.0.1:9123/gas.

Localnet is useful for:

• Offline development without depending on Testnet/Devnet availability
• Rapid iteration on publish and upgrade flows (reset state with each restart)
• Testing init functions and object creation before deploying to a shared network

Mainnet launch checklist

Use this checklist when preparing a package for Mainnet publishing. Every item should be verified before executing the publish transaction.

1. Tests and coverage

Run the full test suite and confirm all tests pass:

sui move test

For coverage reporting (if your project requires a threshold):

sui move test --coverage
sui move coverage summary

Fix any failing tests before proceeding. Do not publish untested code to Mainnet.

2. Dependencies and addresses

• Verify Move.toml uses edition = "2024" and has no legacy [addresses] section or git-based Sui framework dependency.
• Confirm [environments] includes a mainnet entry with the correct chain ID.
• If using MVR dependencies ({ r.mvr = "@org/package" }), verify they resolve on Mainnet.
• Run sui move build to confirm clean compilation with no warnings.

3. Upgrade policy decision

Decide your upgrade policy before publishing — you cannot widen it later:

To restrict the policy in the same transaction as publish, include a moveCall to sui::package::only_additive_upgrades, only_dep_upgrades, or make_immutable on the UpgradeCap in your publish PTB.

4. Gas estimation

Mainnet SUI has real monetary value. Estimate gas before publishing:

sui client publish --dry-run

The dry-run output includes computationCost, storageCost, and storageRebate. The total gas required is computationCost + storageCost - storageRebate. Ensure your address holds enough SUI to cover this amount plus a margin.

5. Signer and custody plan

Decide who controls the publish address and the UpgradeCap:

• Single signer: Simplest. One key publishes and holds the UpgradeCap. Suitable for personal projects or early-stage development.
• Multisig: For teams or high-value packages. Create a multisig address, publish using --serialize-output, and have the required signers sign offline. Transfer the UpgradeCap to the multisig address in the same PTB as publish.
• Immutable on publish: If no upgrades will ever be needed, destroy the UpgradeCap in the publish PTB (sui::package::make_immutable). This removes custody concerns entirely.

For multisig publishing:

# Generate unsigned transaction bytes
sui client publish --serialize-output

# Each signer signs the bytes, then combine and execute

6. Final pre-publish verification

Before executing the publish transaction on Mainnet:

• sui client active-env returns mainnet
• sui client balance shows sufficient SUI for gas (check dry-run estimate)
• sui move build succeeds with no warnings
• sui move test passes with all tests green
• Move.toml has correct edition, no legacy format
• Upgrade policy is decided and restriction call is included in the PTB (if applicable)
• Signer key or multisig is ready
• You have verified the package on Testnet first — same code, same tests, same publish flow

Dry runs and transaction debugging

A dry run simulates a transaction without submitting it to the network. Use dry runs to:

• Estimate gas costs before execution.
• Verify that a transaction succeeds before asking a user to sign.
• Debug failing transactions by inspecting the error before spending gas.

Wallets (like Slush) automatically perform dry runs before presenting a transaction for signing. If a dry run fails, the wallet shows an error instead of prompting.

From the TypeScript SDK, use devInspectTransactionBlock to dry-run a transaction programmatically. From the CLI, the --dry-run flag simulates execution.

When debugging a dry run failure: check that all object IDs are correct, the object versions are current, the sender has sufficient gas, the function arguments match the expected types, and the active environment (sui client active-env) matches the network where the package is published.

Production monitoring

Sui packages are immutable once published, so monitoring is critical — you cannot hotfix a live contract, only publish an upgrade.

What to monitor

Implementation

Use gRPC streaming subscriptions for real-time monitoring:

for await (const event of client.subscriptionService.subscribeEvents({
  filter: { MoveEventModule: { package: PACKAGE_ID, module: 'my_module' } },
})) {
  // Forward to your monitoring stack (Grafana, Datadog, PagerDuty, etc.)
}

For historical analysis, run a custom indexer (sui-indexer-alt) that writes relevant events and transaction effects to your own database. See the accessing-data skill's indexers.md.

Emit events for every security-critical action in your Move code — admin changes, configuration updates, deny list modifications, object deletions. Events are the only way offchain systems can observe these actions.

Rollback and incident response

Sui packages cannot be rolled back. Published bytecode is immutable. There is no revert or rollback command. Recovery means publishing a forward-fix upgrade.

If a bad upgrade is published

1. Assess scope. Determine which functions are affected. Existing objects created by prior versions are still valid — their types are anchored to the original package ID.
2. Publish a fix upgrade immediately. Write the corrected code, run tests, dry-run on Testnet, then sui client upgrade on Mainnet. The new package ID replaces the old one for all future calls.
3. Update frontends. Point PACKAGE_IDS to the new (fixed) package ID. Type queries still use ORIGINAL_PACKAGE_IDS.
4. Communicate. If the bug affected user-facing behavior, notify users through your app's channels.

If the UpgradeCap is compromised

An attacker with the UpgradeCap can publish arbitrary code under your package. Mitigation:

• If you still hold the cap: Immediately restrict it (only_dep_upgrades or make_immutable) to prevent further malicious upgrades.
• If the attacker holds the cap: You cannot recover upgrade authority. Publish a new package, migrate users, and communicate the migration. This is why multisig custody of the UpgradeCap matters for production packages.

If a shared object is corrupted

A buggy function may write invalid state to a shared object. Since shared objects are mutable by any transaction:

• If you can upgrade: Publish an upgrade with a repair function that fixes the corrupted state. Gate it behind an AdminCap.
• If the package is immutable: The only option is to deploy a new package with a migration function that reads the old object's data (if accessible) and creates corrected objects.

Prevention checklist

• UpgradeCap held by multisig or restricted to additive / dep_only
• All upgrades tested on Testnet with the same code, same publish flow
• Admin actions emit events for monitoring
• Critical shared objects have repair functions gated behind capabilities
• Frontend can switch package IDs without a redeploy (environment config, not hardcoded)