You can't directly update metadata for an immutable smart contract. However, if your smart contract uses the coin module and you've been given the TreasuryCap, you can use the update_icon_url method to update the URL of the coin's icon in the metadata. This won't work if you've created a fixed supply token .

If updating icon_url in CoinMetadata doesn't reflect immediately on explorers like suiscan, you might want to check if there's a delay or if you need to trigger a refresh on these platforms. Sometimes the update reflects in multisignature wallets but takes time to appear on explorers .

Updating a coin logo on a deployed Sui smart contract can be challenging due to the contract's immutability. However, there are potential workarounds to achieve this.

Possible Solutions

• Update Coin Metadata: If the CoinMetadata object was not frozen upon creation, you can use functions like update_icon_url to update the logo URL. This requires having the necessary permissions and access to the TreasuryCap object associated with your coin.
• Create a New Coin: If the metadata is frozen, one option is to create a new coin with the updated logo and migrate users to the new coin. This involves creating a new smart contract with the updated logo and functionality to transfer existing tokens to the new coin.
• Use a Proxy Contract: Although not directly applicable to updating metadata, proxy contracts can be used to implement upgradeable logic in your smart contract. This might involve creating a proxy contract that points to the original contract and updates the logo URL accordingly.

Steps to Update Coin Metadata

1. Verify CoinMetadata Status: Check if the CoinMetadata object is frozen or not. If it's not frozen, you can proceed with updating the logo URL.
2. Use update_icon_url Function: Call the update_icon_url function with the new logo URL to update the coin metadata.
3. Verify the Update: After updating the logo URL, verify that the change is reflected on platforms like SuiScan or SuiVision.

Additional Resources

• Sui Documentation: Refer to the official Sui documentation for detailed information on updating coin metadata and working with smart contracts.
• Sui Developer Community: Join the Sui developer community to ask questions and get help from experienced developers ¹.

Keep in mind that the specific steps and feasibility of updating a coin logo may vary depending on your smart contract's implementation and the Sui network's policies.