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CoinJoin in the Browser with AJ ONeal | Incubator WEEKLY

AJ ONeal joins us to discuss CoinJoin in the browser. 00:00 - Introduction and Setup AJ ONeal introduces his browser-based CoinJoin implementation for Dash. He explains the setup, which involves using two separate browsers to simulate different wallets participating in a CoinJoin transaction. The hosts discuss the importance of using separate browser instances to avoid shared state issues and ensure proper functioning of the wallets. 04:54 - CoinJoin Demonstration AJ walks through the process of selecting coins for mixing and initiating the CoinJoin process. He points out various messages and steps involved, such as collateral signing, DarkSend queue announcements, and the creation of draft and final transactions. The demonstration showcases how the CoinJoin process works in a browser environment, highlighting the potential for making privacy features more accessible to users. 12:01 - Exploring Transaction Details The hosts examine the details of a completed CoinJoin transaction, discussing how to verify its authenticity and privacy features. They look at the transaction inputs and outputs, explaining how the lack of transaction fees in CoinJoin transactions contributes to their privacy properties. 18:54 - CoinJoin Denominations and Cash Drawers The conversation shifts to discussing the current limitations of CoinJoin denominations in Dash and potential improvements. AJ introduces the concept of a "cash drawer" for digital currencies, drawing parallels to physical cash management. He explains the mathematical and practical considerations behind optimal currency denominations, arguing for a system that mimics traditional cash drawers with a bell curve distribution of coin values. 27:16 - Mathematical Perfection vs. Practical Usage AJ delves into the mathematics behind optimal denomination choices, discussing concepts like the mathematical constant 'e' and how it relates to human cognitive patterns. He argues for a system of doubles, wholes, and halves across orders of magnitude, which he claims is both mathematically optimal and intuitive for human users. 35:33 - Proposing New Denominations The hosts discuss the idea of introducing more denominations (like twos and fives) to CoinJoin, exploring how this could improve transaction efficiency and privacy. They touch on the trade-offs involved, such as potentially longer mixing times with more denominations, and how a bell curve distribution of denominations could mitigate these issues. 41:56 - Introducing Cash Send AJ introduces his concept of Cash Send, a proposed enhancement to Dash's privacy model. He explains how Cash Send could unify CoinJoin and PrivateSend transactions, using only denominated inputs and outputs. The discussion covers the use of HD wallets for improved privacy in transactions and the handling of fees in the Cash Send model. 49:04 - Implementation and Integration of Cash Send The conversation explores how Cash Send could be implemented and integrated with existing CoinJoin processes. AJ and the host discuss the potential benefits of implementing Cash Send, including increased transaction privacy and improved user experience. They debate whether increasing CoinJoin denominations or implementing Cash Send at the UI level should be prioritized first. 54:58 - Future Plans and Mainnet Readiness The episode concludes with a discussion of AJ's plans for his browser-based CoinJoin tool. He mentions wanting to implement features to show available mixing queues, making it easier for users to choose coins that can be mixed immediately. The conversation briefly touches on the readiness of the tool for mainnet use, with AJ asserting its production-ready status while acknowledging the need for user caution when dealing with cryptocurrencies in browser environments. Connect with Dash Incubator: Homepage: https://dashincubator.app Twitter:   / dashincubator   Youtube:    / @dashincubator   Twitch:   / dashincubator   Discord: https://chat.dashdevs.org GitHub: https://github.com/dashincubator