Currently we pass a Vec. This requires an extra allocation and copy of all elements if a caller doesn't have a Vec already, which is at least 95% of cases.
Another, a smaller issue, we have a function util::to_hex and some structs implement to_hex() on top of it, so we have a mix of it in the code. This PR introduces a trait and a blanket impl for AsRef<[u8]> which brings a uniform API (obj.to_hex()). One unfortunate case is arrays of size bigger than 32 - Rust doesn't implement AsRef for them so it requires an ugly hack (&array[..]).to_hex().
* Calculate reorg depth in BlockStatus::Reorg enum member
* rustfmt
* Fix reorg height calculation and implement reorg test
* rustfmt
* Report reorg depth in webhook payload
* Add optional depth field to the block webhook JSON reply
* Add hooks for network and chain events. Move logging to an EventLogger
* implement webhooks
* fix failing test
* remove unnecessary 'pub'
* add some metadata to the json payload
* avoid unecessary init
* resolve conflicts
