Quote orders

[hardyjosh]

At the moment we can eval rainlang on a fork, functionality provided by the crates in https://github.com/rainlanguage/rain.interpreter

For live orders, this doesn't work so easily because orderbook inserts its own context, and has its own namespace for the store.

I believe @thedavidmeister is planning on adding a quote fn to IOrderbookV4, after that we'll need a Rust interface where, for example, we can provide a subgraph endpoint, rpc url, orderbook address and a subgraph hash and the order will be quoted.

Some of the features we'd need for this crate:

• quote any order
• quote on a fork
• persist fork caches to allow for quoting multiple orders with one fork
• quote on a historical block

[hardyjosh]

There's a wip PR up now for a basic quote

https://github.com/rainlanguage/rain.orderbook/pull/711

[hardyjosh]

To close this issue:

• a new struct in rain_orderbook_common called OrderQuoter
• this should use Forker under the hood in the same way that FuzzRunner does
• will need to take a sg, rpc on construction
• quote fn so we can quote some orderhash for some orderbook address
• quote_many that takes a vec of orderbooks with a vec of order hashes