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XMR<>BTC Atomic Swap - User Interface Prototype Validation

This document:

Collects the validation criteria.
Lists the created user interface prototypes, and link to Figma.
Maps the protoypes to the validation criteria.

This document will be updated with new information during the course of the project.

Questions

The questions are split between Maker (liquidity provider) and Taker (normal user), because the objectives are somewhat different.

Topic	High Level Questions	More specific question	User is happy to...	Actor
Node & Wallet Management	How do users monitor the Bitcoin and Monero blockchain?	Is a user fine with trusting a third party to monitor transactions?	use a service like blockchain.com to retrieve blocks for validation	TM
			run his own Bitcoin node, third party service for Monero	TM
			run his own Monero node, third party service for Bitcoin	TM
			run both his own Bitcoin and Monero node	TM
	How do users brodcast transactions to Bitcoin and Monero?	Is a user fine with trusting a third party to broadcast transactions?	use a wallet that connects to third party nodes	TM
			send signed transactions through third part nodes	TM
			run his own blockchain full node	TM
			run an SPV node (Bitcoin)	TM
	How do users manage their wallets to interace with other software?	Do users want to use already existing wallets?	fund and redeem from existing wallets	TM
			fund from existing Monero wallet, redeem to new Bitcoin wallet	TM
			fund from existing Bitcoin wallet, redeem to new Monero wallet	TM
			fund and redeem into new wallets (explicitly used for swap execution)	TM
		What level of control does the user give to the execution daemon?	give the execution daemon control over the wallets (no user interaction, fully automated)	TM
			use a Bitcoin transaction to give funds to the swap application	TM
			use a Monero transaction to give funds to the swap application	TM
			explicitly sign each transaction	TM
Discovery	How do users discover trading partners?	Do users care about privacy?	go to website and take price from there	T
			set up website (publicly) to advertise price (and connection information)	M
			open "random" (tor) website found on various media (forums, chat) to access a single market maker.	T
			configure Tor for trading	TM
		Do users care about P2P?	use a centralized service to find makers	TM
			user a decentralized service to find makers	TM
Software Setup	How does the user want to manage the swap software setup?	Is the user willing to download software?	download software (swap execution daemon) before being able to do a swap	T
		How does the user want to manage long-running tasks?	keep a GUI/CLI open for the whole length of the swap execution	T
			keep a computer running (that hosts the daemon) for the whole length of the swap execution	T
			keep the browser open for the whole length of a swap	T
Protocol	How important are protocol details to the user?	Does the user care about the incentives of each role?	have different steps (locking first vs second) depending on the direction of the swap	TM

Prototypes

In the initial project description we distinguished product A a single market-maker product and product B a product including peer-to-peer discovery and multiple makers.

P ... Prototype that showcases a complete swap setup flow.
D ... Prototype that focuses on a specific detail of swap setup / execution.

{}-A ... Prototype for product A (single market maker)
{}-B ... Prototype for product B (decentralized trading platform)

Example:

D-A2-1: Mock showing detail 1 for prototype P-A1

Figma Links

P-A1: Webpage for discovery, CLI for execution
P-A2: Webpage for discovery, GUI for execution
D-A2-1: GUI swap execution steps for send BTC, receive XMR
D-A2-2: GUI swap execution steps for send XMR, receive BTC

Mapping of Prototype to validation criteria

User is happy to...	Actor	P-A1	P-A2	D-A2-1	D-A2-2
use a service like blockchain.com to retrieve blocks for validation	TM
run his own Bitcoin node, third party service for Monero	TM
run his own Monero node, third party service for Bitcoin	TM
run both his own Bitcoin and Monero node	TM	T	T
use a wallet that connects to third party nodes	TM
send signed transactions through third part nodes	TM
run his own blockchain full node	TM
run an SPV node (Bitcoin)	TM
fund and redeem from existing wallets	TM	T	T
fund from existing Monero wallet, redeem to new Bitcoin wallet	TM
fund from existing Bitcoin wallet, redeem to new Monero wallet	TM
fund and redeem into new wallets (explicitly used for swap execution)	TM
give the execution daemon control over the wallets (no user interaction, fully automated)	TM	T	T
use a Bitcoin transaction to give funds to the swap application	TM
use a Monero transaction to give funds to the swap application	TM
explicitly sign each transaction	TM
go to website and take price from there	T
set up website (publicly) to advertise price (and connection information)	M	M	M
open "random" (tor) website found on various media (forums, chat) to access a single market maker.	T
configure Tor for trading	TM
use a centralized service to find makers	TM	T	T
user a decentralized service to find makers	TM
download software (swap execution daemon) before being able to do a swap	T
keep a GUI/CLI open for the whole length of the swap execution	T			T	T
keep a computer running (that hosts the daemon) for the whole length of the swap execution	T	T	T	T	T
keep the browser open for the whole length of a swap	T
have different steps (locking first vs second) depending on the direction of the swap	TM			T (M)	T (M)

Legend:

T ... Taker
M ... Maker
TM ... Taker and Maker
T (M) ... Taker showcased, Maker implicitly concerned as well

Interviews

Through user interviews we plan to collect more information on the current setup of users, and how it could be used in a potential product.

Specific prototypes showcase specific answers to the questions listed above. We may use the prototypes in interviews to showcase scenarios.

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