How will wallets work in JAM?

[joepetrowski]

Addresses in Polkadot already can work the way you described, with one address across all parachains. See for example that your address is the same on the Relay Chain and all system chains.

UX Proposal: Consensus-Based Address Formats

Many newcomers to the Polkadot ecosystem (and even some experienced users) find the varying address formats on different chains to be confusing. I’d like to propose that all parachains within a network use the same address format such that your address looks the same within the Polkadot network (including all parachains). This would require no state migrations, but would require: Parachains to update their chainspecs to change their SS58 prefix; and Wallets/UIs (+exchanges etc.) to change the…