How to Transfer Minted Coins in a Move Package

Discover how to successfully transfer minted coins within a Move package using Sui. Overcome challenges in coin transfer with this step-by-step guide. --- This video is based on the question https://stackoverflow.com/q/74269370/ asked by the user 'Alwaysblue' ( https://stackoverflow.com/u/8701527/ ) and on the answer https://stackoverflow.com/a/74391403/ provided by the user 'Alwaysblue' ( https://stackoverflow.com/u/8701527/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Transfer coins in move package Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Transfer Minted Coins in a Move Package If you've ventured into the exciting realm of blockchain and programming, you might be familiar with Move, a programming language designed specifically for secure asset management. As a beginner in Move, you may encounter challenges, particularly when it comes to transferring minted tokens. In this guide, we'll guide you through the steps required to successfully send coins minted in a Move package to a different address using the Sui framework. The Challenge: Minting and Transferring Coins When working with custom tokens in Move, you may find that while you can successfully mint tokens, transferring them to different addresses poses a problem. In your case, you may have successfully created a Move package allowing users to mint tokens, but you stumbled upon the limitation that Sui's transfer only allows the transfer of objects or Sui gas, not the minted coins themselves. The Solution Fortunately, there's a way to implement coin transfers by expanding the functionality of your Move module. Below, we’ll break down the solution and explain how you can implement successful coin transfers. Updated Module Code Here is an updated version of your coin transfer module that provides the ability to send minted coins to different addresses. [[See Video to Reveal this Text or Code Snippet]] Key Components of the Solution Let's break down the important elements in the join_split_transfer function that allows for the transfer of minted coins: Coin Assertion: [[See Video to Reveal this Text or Code Snippet]] This line ensures that there is at least one coin object provided in the vector. If not, it triggers an error. Joining Coins: [[See Video to Reveal this Text or Code Snippet]] Here, the last coin object is popped from the vector, and the remaining coins are joined together, consolidating them into a single coin entity for further processing. Splitting and Transferring: [[See Video to Reveal this Text or Code Snippet]] The split_and_transfer function handles the splitting of the total amount specified and transfers it to the recipient address. Finally, the transferred coin is sent to the transaction's sender. Conclusion Transferring minted coins within a Move package may seem daunting at first, but by using the revised module code and understanding its components, you can successfully navigate the process. With a solid foundation in Move programming and a grasp of the Sui framework, you can create innovative applications that manage and transfer digital assets efficiently. In summary, remember to: Ensure you have proper error handling for coin presence. Use join_vec to consolidate coins before transfers. Split and transfer the coins using the Sui functionalities. With these tools and strategies, you're well on your way to mastering coin transfers in Move!