Get deposit id for across from settlement tx

[anxolin]

This PR obtains the deposit id from across bridging using just the events of the settlement and the orderbook API.

Input:

• tx hash of the settlement
• orderId of the order you want to get the depositId into the across spook contract
• chainId

Main algorithm is:

• Get all across deposits events (ordered by logindex)
• Get all trade events in the settlement (ordered by logindex)
• Extract the orderId from the trades, fetch the order details from Orderbook API
• Filter the orders, leaving only the ones that have a post-hook to bridge using across
• Get the relative position of the orderId you are particularly interested from the settlement. Use that relative order to return the deposit details.

[anxolin]

unrelated to this PR. pls ignore this file...