Add light-weight wallet to manage IOTA tokens

[daniel-mader]

Description

Introduce a light-weight wallet module with an easy-to-use API to manage tokens for the IOTA networks:

• Mainnet (did:iota)
• Shimmer (did:iota:smr)
• Testnet (did:iota:rms)

Possible functionality could be:

• When a DID is "produced", it will return a "deposit address" when the underlying DID has not yet been funded
• When the DID is "produced" and the "deposit address" contains or exceeds the required amount of tokens, the DID transaction is issued to the network
• When a DID is "destroyed", the released funds are returned to the originating address

Motivation

This would enable full creation of DIDs on all IOTA networks through the did-manager library.

Requirements

• Tokens that exceed the required amount to pay for the deposit of the DID should be returned to the originating address
• When a DID is destroyed, the storage deposit should be returned to the originating address

Open Questions

1. Should the user be required to actively configure which "refund address" should be used or will it just be implicitly returned to the originating address?

Are you planning to contribute this in a PR?

Yes