tendermint

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Commit Graph

Author	SHA1	Message	Date
Anton Kaliaev	c4f7256766	lite2: store current validator set (#4472 ) Before we were storing trustedHeader (height=1) and trustedNextVals (height=2). After this change, we will be storing trustedHeader (height=1) and trustedVals (height=1). This a) simplifies the code b) fixes #4399 inconsistent pairing issue c) gives a relayer access to the current validator set #4470. The only downside is more jumps during bisection. If validator set changes between trustedHeader and the next header (by 2/3 or more), the light client will be forced to download the next header and check that 2/3+ signed the transition. But we don't expect validator set change too much and too often, so it's an acceptable compromise. Closes #4470 and #4399	5 years ago
Callum Waters	bb7a80ec7e	lite2: fetch missing headers (#4362 ) Closes #4328 When TrustedHeader(height) is called, if the height is less than the trusted height but the header is not in the trusted store then a function finds the previous lowest height with a trusted header and performs a forwards sequential verification to the header of the height that was given. If no error is found it updates the trusted store with the header and validator set for that height and can then return them to the user. Commits: * drafted trusted header * created function to find previous trusted height * updates missing headers less than the trusted height * minor cosmetic tweaks * incorporated suggestions * lite2: implement Backwards verification and add SignedHeaderAfter func to Store interface Refs https://github.com/tendermint/tendermint/issues/4328#issuecomment-581878549 * remove unused method * write tests * start with next height in SignedHeaderAfter func * fix linter errors * address Callum's comments Co-authored-by: Anton Kaliaev <anton.kalyaev@gmail.com>	5 years ago
Anton Kaliaev	f95409e070	lite2: move AutoClient into Client (#4326 ) * lite2: move AutoClient into Client Most of the users will want auto update feature, so it makes sense to move it into the Client itself, rather than having a separate abstraction (it makes the code cleaner, but introduces an extra thing the user will need to learn). Also, add `FirstTrustedHeight` func to Client to get first trusted height. * fix db store tests * separate examples for auto and manual clients * AutoUpdate tries to update to latest state NOT 1 header at a time * fix errors * lite2: make Logger an option remove SetLogger func * fix lite cmd * lite2: make concurrency assumptions explicit * fixes after my own review * no need for nextHeightFn sequence func will download intermediate headers * correct comment	5 years ago

Author

SHA1

Message

Date

Anton Kaliaev

c4f7256766

lite2: store current validator set (#4472 )

Before we were storing trustedHeader (height=1) and trustedNextVals
(height=2).

After this change, we will be storing trustedHeader (height=1) and
trustedVals (height=1). This a) simplifies the code b) fixes #4399
inconsistent pairing issue c) gives a relayer access to the current
validator set #4470.

The only downside is more jumps during bisection. If validator set
changes between trustedHeader and the next header (by 2/3 or more), the
light client will be forced to download the next header and check that
2/3+ signed the transition. But we don't expect validator set change too
much and too often, so it's an acceptable compromise.

Closes #4470 and #4399

5 years ago

Callum Waters

bb7a80ec7e

lite2: fetch missing headers (#4362 )

Closes #4328

When TrustedHeader(height) is called, if the height is less than the trusted height but the header is not in the trusted store then a function finds the previous lowest height with a trusted header and performs a forwards sequential verification to the header of the height that was given. If no error is found it updates the trusted store with the header and validator set for that height and can then return them to the user.

Commits:

* drafted trusted header

* created function to find previous trusted height

* updates missing headers less than the trusted height

* minor cosmetic tweaks

* incorporated suggestions

* lite2: implement Backwards verification

and add SignedHeaderAfter func to Store interface

Refs https://github.com/tendermint/tendermint/issues/4328#issuecomment-581878549

* remove unused method

* write tests

* start with next height in SignedHeaderAfter func

* fix linter errors

* address Callum's comments

Co-authored-by: Anton Kaliaev <anton.kalyaev@gmail.com>

5 years ago

Anton Kaliaev

f95409e070

lite2: move AutoClient into Client (#4326 )

* lite2: move AutoClient into Client

Most of the users will want auto update feature, so it makes sense to
move it into the Client itself, rather than having a separate
abstraction (it makes the code cleaner, but introduces an extra thing
the user will need to learn).

Also, add `FirstTrustedHeight` func to Client to get first trusted height.

* fix db store tests

* separate examples for auto and manual clients

* AutoUpdate tries to update to latest state

NOT 1 header at a time

* fix errors

* lite2: make Logger an option

remove SetLogger func

* fix lite cmd

* lite2: make concurrency assumptions explicit

* fixes after my own review

* no need for nextHeightFn

sequence func will download intermediate headers

* correct comment

5 years ago

2 Commits (e69a3d9703f2f6e46ccdf2c2627b725b57eebbad)