programmers_guide

* Initial commit

* Add sentry gRPC interface

* p2psentry directory

* Update README.md

* Update README.md

* Update README.md

* Add go package

* Correct syntax

* add external downloader interface (#2)

* Add txpool (#3)

* Add private API (#4)

* Invert control.proto, add PeerMinBlock, Separare incoming Tx message into a separate stream (#5)

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

* Separate upload messages into its own stream (#6)

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

* Only send changed accounts to listeners (#7)

* Txpool interface doc (#9)

* More additions

* More additions

* Fix locking

* Intermediate

* Fix separation of phases

* Intermediate

* Fix test

* More transformations

* New simplified way of downloading headers

* Fix hard-coded header sync

* Fixed syncing near the tip of the chain

* Add architecture diagram source and picture (#10)

* More fixes

* rename tip to link

* Use preverified hashes instead of preverified headers

* Fix preverified hashes generation

* more parametrisation

* Continue parametrisation

* Fix grpc data limit, interruption of headers stage

* Add ropsten preverified hashes

* Typed hashes (#11)

* Typed hashes

* Fix PeerId

* 64-bit tx nonce

* Disable penalties

* Add goerli settings, bootstrap nodes

* Try to fix goerly sync

* Remove interfaces

* Add proper golang packages, max_block into p2p sentry Status

* Prepare for proto overhaul

* Squashed 'interfaces/' content from commit ce36053c2

git-subtree-dir: interfaces
git-subtree-split: ce36053c24db2f56e48ac752808de60afa1dfb4b

* Change EtherReply to address

* Adaptations to new types

* Switch to new types

* Fixes

* Fix formatting

* Fix lint

* Lint fixes, reverse order in types

* Fix lint

* Fix lint

* Fix lint

* Fix test

* Not supporting eth/66 yet

* Fix shutdown

* Fix lint

* Fix lint

* Fix lint

* return stopped check

Co-authored-by: Artem Vorotnikov <artem@vorotnikov.me>
Co-authored-by: b00ris <b00ris@mail.ru>
Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>
Co-authored-by: lightclient <14004106+lightclient@users.noreply.github.com>
Co-authored-by: canepat <16927169+canepat@users.noreply.github.com>