This change adds adds an ability to use different source of time for whisper:
when envelope is created it is used to set expiry
to track when envelope needs to be expired
This time is then used to check validity of the envelope when it is received. Currently If we receive an envelope that is sent from future - peer will get disconnected. If envelope that was received has an expiry less then now it will be simply dropped, if expiry is less than now + 10*2 seconds peer will get dropped.
So, it is clear that whisper depends on time. And any time we get a skew with peers that is > 20s reliability will be grealy reduced.
In this change another source of time for whisper will be used. This time source will use ntp servers from pool.ntp.org to compute offset. When whisper queries time - this offset will be added/substracted from current time.
Query is executed every 2 mins, queries 5 different servers, cut offs min and max and the computes mean value. pool.ntp.org is resolved to different servers and according to documentation you will rarely hit the same.
Closes: #687
* Update `github.com/ethereum/go-ethereum` package to 1.8.1 branch. Part of #638
* Fix code due to some signature changes. Part of #638
* use upstream for whisper backend
* Add patch to downgrade usage of Whisper v6 to v5 in some geth 1.8.1 vendor files. Part of #638
* Take into account the DNS rebinding protection introduced in 1.8.0 by adding exception for localhost. Part of #638
* Add patches required for cross-compiled builds starting with geth 1.8.0. Only applied during build. Part of #638
* Update expected JSON result in `TestRegressionGetTransactionReceipt()` and `TestCallRawResultGetTransactionReceipt()`. Part of #665
* Fix some failing e2e tests. Part of #638
* Address comments in PR #702. Part of #638
* static: updates Whisper test (to work with Geth 1.6.1)
* jail: VM persistence implemented
* jail: sendMessage/showSuggestions minor fixes (to be squashed)
* node: CHT and boot nodes auto-load implemented
* Replaced CHT data file from farazdagi's to tiabc's
* Rewrote config_test.go using testify having reduced it twice in size
* Increased SyncTime and panic timeout in tests
* Fixed test - remove go default test to testify/suite (#207)
* Add flag setup for RPCEnabled and add comment (#225)
* jail: register method handlers before running initial js in jail (#226)
* Console Jail Mod #179 (#228)
* Added ./statusd-data into .gitignore
* Increased log level for the test node from INFO to ERROR
* Add call to loop.Run to evaluate all setTimeout/setIntervals methods. (#208)
* Rebase onto geth1.6.7 (#232)
* Got back sync duration from 60s to 30s, updated bindata.go
Adrià Cidre
Dmitry Shulyak
Dmitry Shulyak
Pedro Pombeiro
Adam Babik
Igor Mandrigin
Ivan Tomilov
Victor Farazdagi
Jarrad Hope
Daniel Whitenack