0004 XLS-4d Standard URI instructing a wallet to add a trustline

[RichardAH]

I suggest we follow on closely from the design of XLS-2d

Query parameters:
action=trustline
limit=<integer>
currency=<issuer address>:<currency code>
rippling=true|false (optional, default = false)

I.e.

{ url } ? { trust line instructions }

So for example

anything://any.domain/url/?action=trustline&limit=10000&currency=rvYAfWj5gh67oV6fW32ZzP3Aw4Eubs59B:USD&rippling=false

I realise compounding the currency and issuer information is a little tacky here but we did it in the previous standard

[RichardAH]

to be as backward compatible as possible with defacto existing implementations I suggest any instruction that doesn't explicitly have an action= parameter is default interpreted as a payment instruction. (That said: action=payment should probably be the canonical on XLS-2d)