Commit Graph

131 Commits

Author SHA1 Message Date
Paul Hauner
9aedb12bfc
Refactor docs into mdbook (#547)
* Refactor documentation, ef_tests makefile

* Add makefile to root

* Tidy readme

* Fix readme badges

* Tidy logs

* Add terminalize gif

* Update readme image

* Update readme image

* Tidy logs

* Update readme image

* Update readme

* Update readme

* Fix book link

* Update makefiles

* Update book

* Fix link in book

* Add readme for book

* Remove old docs, move api spec YAML

* Fix eth2/ dir readme

* Add readme for lcli

* Add about this book section

* Minor formatting improvements

* Address mehdi's comments
2019-10-02 11:04:56 +10:00
pscott
7eb82125ef Clippy clean (#536)
* Change into_iter to iter

* Fix clippy 'easy' warnings

* Clippy eth2/utils

* Add struct NetworkInfo

* Clippy for types, utils, and beacon_node/store/src/iters.rs

* Cargo fmt

* Change foo to my_foo

* Remove complex signature

* suppress clippy warning for unit_value in benches

* Use enumerate instead of iterating over range

* Allow trivially_copy_pass_by_ref in serde_utils
2019-09-30 13:58:45 +10:00
Luke Anderson
23ce271b5f
Return HTTP 202 to indicate processing error.
- A processing error of a validator's block or attestation should not prevent publishing. Now a 202 error is returned, to indicate that it has not been processed, but has still been published.
 - Added a publish_attestation function to the API, handling POST requests for /beacon/validator/attestation.
2019-09-13 21:22:32 +10:00
Luke Anderson
d3ce182ddc
Renamed 'InvalidQueryParams' to 'BadRequest', since it is a more general error that is returned in a number of cases. 2019-09-13 20:52:12 +10:00
Luke Anderson
f48311900e
Restructured response builder to give YAML or JSON when SSZ is not available, not just JSON. 2019-09-13 20:42:56 +10:00
Luke Anderson
1dd86baf1a
Cleaning up the rest of the API functions.
- Removed all unused imports
 - Fixed random compiler errors
 - Removed all of the 'sucess_response' helpers.
 - Enabled all of the API endpoints again, wrapping in 'into_boxfut'
 - Tidied up /metrics endpoint
 - Added a 'body_text' part to ResponseBuilder, mainly for the Prometheus /metrics endpoint
 - Cleaned up the unnecessary helpers::* imports, to be more explicit.
2019-09-13 19:38:40 +10:00
Luke Anderson
006350c0cd
Fixed small bug with get_fork function 2019-09-13 19:14:09 +10:00
Luke Anderson
91f5f17566
Removing 'success_respons' in favour of 'ResponseBuilder' 2019-09-13 19:10:11 +10:00
Luke Anderson
09e11dd081
Merge branch 'api-alignment' into validator-post-fns 2019-09-13 19:06:32 +10:00
Luke Anderson
0b2f3bbf00
Updated another function for head_state (missing from previous commit). 2019-09-13 18:59:01 +10:00
Luke Anderson
b0e3ce7885
Addressed Paul's comments regarding head_state. 2019-09-13 18:58:08 +10:00
Luke Anderson
cd8f40b4b7
Getting regular endpoint functions to return futures.
- Wrapped endpoint functions in new into_boxfut function
 - Undid changes to Network API service, now returning ApiResult again.
 - Cleaning up of functions, and removal of success_response functions in updated endpoints.
 - A bunch of other clean-ups.
2019-09-12 15:20:31 +10:00
Luke Anderson
82f4303787
Merge branch 'api-alignment' into validator-post-fns 2019-09-12 15:12:54 +10:00
Luke Anderson
c254ac8c2e
Separated acquisition of BeaconChain and BeaconState. 2019-09-12 01:44:45 +10:00
Luke Anderson
0bd8187ff6
Revert most of commit ebd97730d5.
- Undoing making of the beacon chain read stuff return futures, instead dealing with it elsewhere.
2019-09-11 18:21:51 +10:00
Luke Anderson
2739ee83f9
Further restructuring futures API.
- Adding try_future! macros where necessary
 - Returning ApiResult and mapping it to future instead
 - Upgrading POST publish block to return a future directly
2019-09-11 18:02:00 +10:00
Luke Anderson
ebd97730d5
Converted the Beacon API service to Futures
- Added SSZ encode for HeadResponse
 - Converted all of the /beacon/ endpoints to return BoxFut instead of ApiResult
 - Wrapped all of the '?'s in a new macro try_future!()
 - Copied the try macro to try_future, so that a boxed future can easily be returned.
 - Replaced all of the response serializations to use the new success_response
2019-09-11 01:43:49 +10:00
Luke Anderson
b8667217f0
Made async functions work!
- Cleaned up imports
 - Moved ApiError and such to it's own error.rs
 - Obsoleted 'success_response' in favour of new async regular and json only flavours
 - Made ApiError work async and be derived from hyper errors
 - Added a check to ensure an error is thrown if a non-json encoding is requested on a json-only function
 - Made all the individual service functions return futures (only node and network for now)
2019-09-11 00:40:22 +10:00
Luke Anderson
b0090df543
Getting the restructured ApiService to work. 2019-09-10 19:30:36 +10:00
Michael Sproul
4dcad27381
Fix ApiService woes (hopefully) 2019-09-10 17:27:28 +10:00
Luke Anderson
576712cefe
WIP: Trying to get futures to work... 2019-09-10 17:16:41 +10:00
Luke Anderson
965d6f1df9
WIP: More restructuring to have ApiService be a future. 2019-09-10 15:35:54 +10:00
Luke Anderson
405a59e8b9
WIP: Trying to restructure ApiService to be async. 2019-09-10 10:56:50 +10:00
Luke Anderson
ca9094e79a
WIP: Made block publishing validator function, which sends to a network channel. Untested. 2019-09-10 10:54:37 +10:00
Luke Anderson
0136eb33b0
WIP: Added POST functionality for pusblish_beacon_block. Currently doesn't compile, struggling with the borrow checker. 2019-09-09 12:54:14 +10:00
Luke Anderson
99c673045c
Moved chain/cache building into separate function, and made sure that all REST API endpoints are using this function to get the state. 2019-09-09 12:10:41 +10:00
Luke Anderson
e6a0d038e9
Added YAML types for list of validators and added some logging to duties function. 2019-09-06 14:10:49 +10:00
Luke Anderson
32ca8e951d
Updated content-type acceptance and returning, mainly for /spec/eth2_config 2019-09-05 00:36:06 +10:00
Luke Anderson
bf2f459773
Extended API
- Added a /beacon/validators function, to list all validators active in a particular epoch
 - Moved 'get_genesis_state' function, to align with router.
 - Added content-type for error responses
 - Tried adding a cache update call to fix issue getting validator duties (this is WIP)
2019-09-04 23:03:05 +10:00
Luke Anderson
eeba69cd0f
Moved beacon chain from request functionality into its own function. 2019-09-04 22:03:55 +10:00
Luke Anderson
01b652ab0e
Fixed merge conflict, updated calls.
- Fixed function re-names
 - Updated the function which gets the beacon_chain from the request, and makes sure caches are updated.
 - Updated this api-alignment branch with the new code from interop branch.
2019-09-04 16:06:14 +10:00
Luke Anderson
28a2ce2bdc
Fix formatting with rustfmt. 2019-09-04 14:19:48 +10:00
Luke Anderson
0c1ceab527
Addressed Paul's suggestions.
- Updated some comments.
 - Replaced match statements with map functions.
2019-09-04 13:43:45 +10:00
Luke Anderson
b432c8c58c
Replaced unnecessary match statements with map_err and ok_or 2019-09-04 11:18:29 +10:00
Luke Anderson
dcd074877b
Removed block publish feature, since it's incomplete currently. 2019-09-04 10:57:09 +10:00
Luke Anderson
c13f27e245
Updating REST API.
- Made /beacon/state return the current 'head' state when no parameters are provided.
 - Added some of the YAML api spec stuff to the /beacon/state endpoint in the rest_api spec.
2019-09-03 16:30:04 +10:00
Paul Hauner
bfbe776712
Add special genesis state API endpoint 2019-09-02 15:07:48 +10:00
Paul Hauner
6c50758bdf
Add ResponseBuilder to rest_api 2019-09-02 14:29:36 +10:00
Paul Hauner
fa6ba51eb7
Make gRPC and HTTP on by default 2019-09-01 19:33:21 +10:00
Luke Anderson
632c13a9ec
Fixing some API bits
- Adding the validator routes into the main function.
 - Fixing the setting of the aggregation bits, and handling errors correctly.
 - Rust format fixes, and addressing compiler warnings.
2019-09-01 15:41:03 +10:00
Luke Anderson
8ea1167563
Factored out getting beacon_chain from request into it's own function. 2019-09-01 15:09:01 +10:00
Luke Anderson
5ee1bb20b7
WIP: Furthered attestation production for validator. 2019-08-31 23:56:35 +10:00
Paul Hauner
682081ef07
Add first pass at removing speculative state 2019-08-29 19:14:52 +10:00
Paul Hauner
29c8477242
Merge branch 'master' into interop 2019-08-29 16:00:22 +10:00
Luke Anderson
eaec5e7b69
Start implementation of 'get attstation' validator function.
- Created new /beacon/validator/attestation endpoint
 - Updated some small issues with the API spec.
2019-08-29 14:58:49 +10:00
Paul Hauner
7d03806107
Upgrade codebase to new SlotClock API 2019-08-29 14:26:30 +10:00
Luke Anderson
b9276da9db
Flesh spec. & update display bugs.
- Add correct string formatting when incorrect parameters provided.
 - Fill /beacon/block and /beacon/block_root endpoints
 - Add 500 error responses to endpoints as appropriate
2019-08-29 13:36:51 +10:00
Paul Hauner
4557d2c84b
Merge branch 'interop' into millsecond-slots 2019-08-29 13:27:06 +10:00
Paul Hauner
bcd53a8b10
Migrate codebase across to new SlotClock API 2019-08-29 13:25:55 +10:00
Luke Anderson
ca07d72453
Removed methods for 'chain_id', since this is no longer applicable to ETH2. 2019-08-29 12:42:45 +10:00
Luke Anderson
faef347d18
Fleshed out some API endpoints.
- Added the /beacon/validator/block endpoint for GET (untested)
 - Added the /beacon/fork endpoint for GET
 - Cleaned up a bunch of unused imports & variables
 - Removed '/network/block_discovery' endpoint
2019-08-28 23:33:34 +10:00
Luke Anderson
77e2f576af
Further aligning the API & implementation.
- Completed implementation of /beacon/head
 - renamed 'latest_finalized_checkpoint' to 'current_finalized_checkpoint' for consistency
 - Reorganised list of endpoints in both spec & router so that they match
 - Fixed the content-type modifications for /metrics
 - Added a new 'RFC' tag to the spec, to tag things that we have not implemented and aren't sure if it's useful.
 - Moved 'deposit_contract' under /spec
2019-08-28 21:25:38 +10:00
Luke Anderson
16ec330a79
Started aligning API spec with implementation.
- Adding some missing fields to structs
 - Rearranged the endpoints in the rest_api router, and renamed, using an 'implementation_pending' function
 - Added 'content-type' headers, to distinguish difference with /node/metrics
 - Updated OpenAPI spec to v0.2.0
    - Split /node/fork into /node/chain_id and /beacon/fork
    - Moved /metrics to /node/metrics
    - Added example to /node/metrics, since it's text/plain
    - Moved /node/network to just /network
    - Added lots of stubs for endpoints which exist in the router
    - Reordered large parts of the OpenAPI spec
    - Moved /chain/beacon/... to just /beacon/...
2019-08-28 02:05:19 +10:00
Luke Anderson
328f11d564
Validator API (#504)
* Implemented more REST API endpoints.
 - Added many of the endpoints, which return 501 - Not Implemented
 - Created helper function to return a not implemented error
 - Created a parse_pubkey function to get a PublicKey from a hex string
 - Created a HTTP handler for the validator endpoints
 - Started implementing validator/duties endpoint.

* Fleshed out get validator duties.
 - Re-implemented the get validator duties function for the REST API
 - Added an 'as_hex_string' function to FakePublicKey, beacuse it was missing.

* Fixed small caching/state bug.

* Extended to array of API inputs.
 - Created  function for getting arrays from GET parameters.
 - Extended get validator duties function to support array of validator duties.

* Tidy API to be more consistent with recent decisions

* Addressing Paul's comments.
 - Cleaning up function to get list of proposers.
 - Removing unnecessary serde annotations
 - Clarifying error messages
 - Only accept pubkeys if they are '0x' prefixed.

* Fixed formatting with rustfmt.
2019-08-28 00:40:35 +10:00
Paul Hauner
6875ae8af5
Pull Eth2Config during bootstrap 2019-08-27 00:04:15 +10:00
Paul Hauner
0c3fdcd57c
Bootstrap (#501)
* Renamed fork_choice::process_attestation_from_block

* Processing attestation in fork choice

* Retrieving state from store and checking signature

* Looser check on beacon state validity.

* Cleaned up get_attestation_state

* Expanded fork choice api to provide latest validator message.

* Checking if the an attestation contains a latest message

* Correct process_attestation error handling.

* Copy paste error in comment fixed.

* Tidy ancestor iterators

* Getting attestation slot via helper method

* Refactored attestation creation in test utils

* Revert "Refactored attestation creation in test utils"

This reverts commit 4d277fe4239a7194758b18fb5c00dfe0b8231306.

* Integration tests for free attestation processing

* Implicit conflicts resolved.

* formatting

* Do first pass on Grants code

* Add another attestation processing test

* Tidy attestation processing

* Remove old code fragment

* Add non-compiling half finished changes

* Simplify, fix bugs, add tests for chain iters

* Remove attestation processing from op pool

* Fix bug with fork choice, tidy

* Fix overly restrictive check in fork choice.

* Ensure committee cache is build during attn proc

* Ignore unknown blocks at fork choice

* Various minor fixes

* Make fork choice write lock in to read lock

* Remove unused method

* Tidy comments

* Fix attestation prod. target roots change

* Fix compile error in store iters

* Reject any attestation prior to finalization

* Begin metrics refactor

* Move beacon_chain to new metrics structure.

* Make metrics not panic if already defined

* Use global prometheus gather at rest api

* Unify common metric fns into a crate

* Add heavy metering to block processing

* Remove hypen from prometheus metric name

* Add more beacon chain metrics

* Add beacon chain persistence metric

* Prune op pool on finalization

* Add extra prom beacon chain metrics

* Prefix BeaconChain metrics with "beacon_"

* Add more store metrics

* Add basic metrics to libp2p

* Add metrics to HTTP server

* Remove old `http_server` crate

* Update metrics names to be more like standard

* Fix broken beacon chain metrics, add slot clock metrics

* Add lighthouse_metrics gather fn

* Remove http args

* Fix wrong state given to op pool prune

* Make prom metric names more consistent

* Add more metrics, tidy existing metrics

* Fix store block read metrics

* Tidy attestation metrics

* Fix minor PR comments

* Fix minor PR comments

* Remove duplicated attestation finalization check

* Remove awkward `let` statement

* Add first attempts at HTTP bootstrap

* Add beacon_block methods to rest api

* Fix serde for block.body.grafitti

* Allow travis failures on beta (see desc)

There's a non-backward compatible change in `cargo fmt`. Stable and beta
do not agree.

* Add network routes to API

* Fix rustc warnings

* Add best_slot method

* Add --bootstrap arg to beacon node

* Get bootstrapper working for ENR address

* Store intermediate states during block processing

* Allow bootstrapper to scrape libp2p address

* Update bootstrapper libp2p address finding

* Add comments

* Tidy API to be more consistent with recent decisions

* Address some review comments

* Make BeaconChainTypes Send + Sync + 'static

* Add `/network/listen_port` API endpoint

* Abandon starting the node if libp2p doesn't start

* Update bootstrapper for API changes

* Remove unnecessary trait bounds
2019-08-23 15:53:53 +10:00
Paul Hauner
a358bbc1b1
Update bootstrapper for API changes 2019-08-23 12:45:31 +10:00
Paul Hauner
94d987cb6a
Add /network/listen_port API endpoint 2019-08-23 12:13:03 +10:00
Paul Hauner
853344af8a
Make BeaconChainTypes Send + Sync + 'static 2019-08-22 16:34:21 +10:00
Paul Hauner
5a34f86e77
Address some review comments 2019-08-22 16:14:51 +10:00
Paul Hauner
b912e26b79
Tidy API to be more consistent with recent decisions 2019-08-22 14:37:47 +10:00
Paul Hauner
c4ced3e0d2
Fix block processing blowup, upgrade metrics (#500)
* Renamed fork_choice::process_attestation_from_block

* Processing attestation in fork choice

* Retrieving state from store and checking signature

* Looser check on beacon state validity.

* Cleaned up get_attestation_state

* Expanded fork choice api to provide latest validator message.

* Checking if the an attestation contains a latest message

* Correct process_attestation error handling.

* Copy paste error in comment fixed.

* Tidy ancestor iterators

* Getting attestation slot via helper method

* Refactored attestation creation in test utils

* Revert "Refactored attestation creation in test utils"

This reverts commit 4d277fe4239a7194758b18fb5c00dfe0b8231306.

* Integration tests for free attestation processing

* Implicit conflicts resolved.

* formatting

* Do first pass on Grants code

* Add another attestation processing test

* Tidy attestation processing

* Remove old code fragment

* Add non-compiling half finished changes

* Simplify, fix bugs, add tests for chain iters

* Remove attestation processing from op pool

* Fix bug with fork choice, tidy

* Fix overly restrictive check in fork choice.

* Ensure committee cache is build during attn proc

* Ignore unknown blocks at fork choice

* Various minor fixes

* Make fork choice write lock in to read lock

* Remove unused method

* Tidy comments

* Fix attestation prod. target roots change

* Fix compile error in store iters

* Reject any attestation prior to finalization

* Begin metrics refactor

* Move beacon_chain to new metrics structure.

* Make metrics not panic if already defined

* Use global prometheus gather at rest api

* Unify common metric fns into a crate

* Add heavy metering to block processing

* Remove hypen from prometheus metric name

* Add more beacon chain metrics

* Add beacon chain persistence metric

* Prune op pool on finalization

* Add extra prom beacon chain metrics

* Prefix BeaconChain metrics with "beacon_"

* Add more store metrics

* Add basic metrics to libp2p

* Add metrics to HTTP server

* Remove old `http_server` crate

* Update metrics names to be more like standard

* Fix broken beacon chain metrics, add slot clock metrics

* Add lighthouse_metrics gather fn

* Remove http args

* Fix wrong state given to op pool prune

* Make prom metric names more consistent

* Add more metrics, tidy existing metrics

* Fix store block read metrics

* Tidy attestation metrics

* Fix minor PR comments

* Allow travis failures on beta (see desc)

There's a non-backward compatible change in `cargo fmt`. Stable and beta
do not agree.

* Tidy `lighthouse_metrics` docs

* Fix typo
2019-08-19 21:02:34 +10:00
Paul Hauner
ce37f95861
Allow bootstrapper to scrape libp2p address 2019-08-15 16:41:02 +10:00
Paul Hauner
c97b3b20cb
Add best_slot method 2019-08-14 20:58:51 +10:00
Paul Hauner
c93d2baa91
Add network routes to API 2019-08-14 18:24:42 +10:00
Paul Hauner
f2dedfac50
Merge branch 'block-processing-times' into bootstrap 2019-08-14 12:32:16 +10:00
Paul Hauner
2bf0d5c071
Add beacon_block methods to rest api 2019-08-14 11:22:43 +10:00
Paul Hauner
4f98a3985f
Add first attempts at HTTP bootstrap 2019-08-14 10:36:55 +10:00
Paul Hauner
7165598b7f
Add lighthouse_metrics gather fn 2019-08-12 18:19:50 +10:00
Paul Hauner
d7c546844c
Fix broken beacon chain metrics, add slot clock metrics 2019-08-12 17:44:47 +10:00
Paul Hauner
95a320817e
Update metrics names to be more like standard 2019-08-12 15:42:23 +10:00
Paul Hauner
6a1e5f6d26
Remove old http_server crate 2019-08-12 15:19:39 +10:00
Paul Hauner
af334b2cf0
Add metrics to HTTP server 2019-08-12 14:30:46 +10:00
Paul Hauner
7140dbc45d
Add extra prom beacon chain metrics 2019-08-12 13:26:58 +10:00
Paul Hauner
36ff115b04
Use global prometheus gather at rest api 2019-08-11 14:46:20 +10:00
Paul Hauner
48733917be
Begin metrics refactor 2019-08-11 12:12:19 +10:00
Paul Hauner
989e2727d7
Changes to rest_api (#480)
* Add half-finished rest api changes

* Add basic, messy changes to rest api

* Fix expect() in ApiRequest

* Remove ApiRequest, add route for beacon state

* Tidy rest api, add get state from root

* Add api method for getting state roots by slot

* Add test for URL helper

* Simplify state_at_slot fn

* Add tests for rest api helper fns

* Add extra tests for parse root

* Fix clippy lints

* Fix compile error in rest api

* Update test to new ethereum-types
2019-08-10 17:15:15 +10:00
Paul Hauner
3a1f56a42e
Tidy ancestor iterators (#490)
* Tidy ancestor iterators

* Improve comments, remove code fragement
2019-08-08 12:28:10 +10:00
Paul Hauner
e21d3fed05
Revert "Tidy ancestor iterators"
This reverts commit 5079c25bb2.

Accidental push to master.. my bad!
2019-08-05 16:27:55 +10:00
Paul Hauner
5079c25bb2
Tidy ancestor iterators 2019-08-05 16:25:21 +10:00
Luke Anderson
0052ea711e First RESTful HTTP API (#399)
* Added generated code for REST API.
 - Created a new crate rest_api, which will adapt the openapi generated code to Lighthouse
 - Committed automatically generated code from openapi-generator-cli (via docker). Should hopfully not have to modify this at all, and do all changes in the rest_api crate.

* Removed openapi generated code, because it was the rust client, not the rust server.

* Added the correct rust-server code, automatically generated from openapi.

* Added generated code for REST API.
 - Created a new crate rest_api, which will adapt the openapi generated code to Lighthouse
 - Committed automatically generated code from openapi-generator-cli (via docker). Should hopfully not have to modify this at all, and do all changes in the rest_api crate.

* Removed openapi generated code, because it was the rust client, not the rust server.

* Added the correct rust-server code, automatically generated from openapi.

* Included REST API in configuratuion.
 - Started adding the rest_api into the beacon node's dependencies.
 - Set up configuration file for rest_api and integrated into main client config
 - Added CLI flags for REST API.

* Futher work on REST API.
 - Adding the dependencies to rest_api crate
 - Created a skeleton BeaconNodeService, which will handle /node requests.
 - Started the rest_api server definition, with the high level request handling logic.

* Added generated code for REST API.
 - Created a new crate rest_api, which will adapt the openapi generated code to Lighthouse
 - Committed automatically generated code from openapi-generator-cli (via docker). Should hopfully not have to modify this at all, and do all changes in the rest_api crate.

* Removed openapi generated code, because it was the rust client, not the rust server.

* Added the correct rust-server code, automatically generated from openapi.

* Included REST API in configuratuion.
 - Started adding the rest_api into the beacon node's dependencies.
 - Set up configuration file for rest_api and integrated into main client config
 - Added CLI flags for REST API.

* Futher work on REST API.
 - Adding the dependencies to rest_api crate
 - Created a skeleton BeaconNodeService, which will handle /node requests.
 - Started the rest_api server definition, with the high level request handling logic.

* WIP: Restructured REST API to use hyper_router and separate services.

* WIP: Fixing rust for REST API

* WIP: Fixed up many bugs in trying to get router to compile.

* WIP: Got the beacon_node to compile with the REST changes

* Basic API works!
 - Changed CLI flags from rest-api* to api*
 - Fixed port cli flag
 - Tested, works over HTTP

* WIP: Moved things around so that we can get state inside the handlers.

* WIP: Significant API updates.
 - Started writing a macro for getting the handler functions.
 - Added the BeaconChain into the type map, gives stateful access to the beacon state.
 - Created new generic error types (haven't figured out yet), to reduce code duplication.
 - Moved common stuff into lib.rs

* WIP: Factored macros, defined API result and error.
 - did more logging when creating HTTP responses
 - Tried moving stuff into macros, but can't get macros in macros to compile.
 - Pulled out a lot of placeholder code.

* Fixed macros so that things compile.

* Cleaned up code.
 - Removed unused imports
 - Removed comments
 - Addressed all compiler warnings.
 - Ran cargo fmt.

* Removed auto-generated OpenAPI code.

* Addressed Paul's suggestions.
 - Fixed spelling mistake
 - Moved the simple macros into functions, since it doesn't make sense for them to be macros.
 - Removed redundant code & inclusions.

* Removed redundant validate_request function.

* Included graceful shutdown in Hyper server.

* Fixing the dropped exit_signal, which prevented the API from starting.

* Wrapped the exit signal, to get an API shutdown log line.
2019-07-31 18:29:41 +10:00