Firstly, `Step.duration_remaining` casts it to u32, unnecesarily
limiting it to 2^32. While theoretically this is "good enough" (at 3
seconds steps it provides room for a little over 400 years), it is
still a lossy way to calculate the remaining time until the next step.

Secondly, step duration might be zero, triggering division by zero
in `Step.calibrate`

Solution: rework the code around the fact that duration is
typically in single digits and never grows, hence, it can be represented
by a much narrower range (u16) and this highlights the fact that
multiplying u64 by u16 will only result in an overflow in even further
future, at which point we should panic informatively (if anybody's
still around)

Similarly, panic when it is detected that incrementing the step
counter wrapped around on the overflow of usize.

As for the division by zero, prevent it by making zero an invalid
value for step duration. This will make AuRa log the constraint
mismatch and panic (after all, what purpose would zero step duration
serve? it makes no sense within the definition of the protocol,
as finality can only be achieved as per the specification
if messages are received within the step duration, which would violate
the speed of light and other physical laws in this case).

* detect different node, same-key signing in aura

* reduce scope of warning

* new warp enodes

* added one more warp enode; replaced spaces with tabs

André Silva authored Dec 08, 2017 and Arkadiy Paronyan committed Dec 08, 2017

* reduce max block timestamp drift to 15 seconds

* add test for block timestamp validation within allowed drift

* Fix Aura difficulty race

* fix test key

* extract out score calculation

* fix build

Provided by @5chdn

Tomasz Drwięga authored Dec 05, 2017 and Arkadiy Paronyan committed Dec 05, 2017

* Enable delayed maximum_uncle_count activation.

* Fix tests.

* Defer kovan HF.

* Removed ethcore-util dependency

* Removed snappy

* Remove blockhash error

* Update tests.

It is era 49, and should correspond to ECIP1017/ECIP1039's era 50.

Impl payload

empty str is none

Update tests

Clean

Update wasm-tests

Fix potential rounding errors between geth and parity in the long-term future.

Tomasz Drwięga authored Nov 03, 2017 and Arkadiy Paronyan committed Nov 03, 2017

* Allow to include all queue transactions in pending block.

* Fix tests.

Nikolay Volf authored Nov 02, 2017 and Arkadiy Paronyan committed Nov 02, 2017

* Action params and embedded params handling

* fix namespaces