Upala provides a digital identity uniqueness score. The score is valued in dollars and represents the explosion price - an amount of money that an identity holder can get at any time for deleting their ID. The higher the explosion price the higher the owner values the ID and the safer it is for DApps to interact with.
The hardest challenge was figuring out the sources of bugs. Node app, Metamask, local node, remote node, smart contracts - it is very hard to trace an issue. Soultion is to remeber to reset all the things before doing tests and deployments.