Expanding CAIP10, CAIP19 charset to include underscores

[tristan-bp]

I would like to expand the charset for account addresses in CAIP 10 and asset references / token ids in CAIP 19 to include underscores (_).

Underscores are used in blockchain addresses (example: telegram's ton) and typically don't require URL encoding for security purposes.

[bumblefudge]

Hey there:

So, CAIP-10 is "final" because implemented and load-bearing in prod for the entire wallet connect network, minor changes to it would be quite harmful to interop. Generally, when someone wants to make significant/normative changes to a final spec, we recommend just "forking" the CAIP, i.e., creating a new CAIP that "supercedes" the final one and presenting it as an alternative (and upgrade path) to implementers considering or already using the final one.

I would also mention here that CAIP-350/EIP-7930 propose a few minor changes to CAIP-2 and CAIP-10, so it might make sense to bundle together your character-set change with theirs and propose a "drop-in, backwards-compatible" replacement to CAIP-10 as a new CAIP. The hard part isn't defining the specification, it's finding the implementers willing to take it to prod... so working with the CAIP-350/EIP-7930 crowd and/or the TON crowd offline would be highly recommended!