Closes: #4530
This PR contains logic for both submitting an evidence by the light client (lite2 package) and receiving it on the Tendermint side (/broadcast_evidence RPC and/or EvidenceReactor#Receive). Upon receiving the ConflictingHeadersEvidence (introduced by this PR), the Tendermint validates it, then breaks it down into smaller pieces (DuplicateVoteEvidence, LunaticValidatorEvidence, PhantomValidatorEvidence, PotentialAmnesiaEvidence). Afterwards, each piece of evidence is verified against the state of the full node and added to the pool, from which it's reaped upon block creation.
* rpc/client: do not pass height param if height ptr is nil
* rpc/core: validate incoming evidence!
* only accept ConflictingHeadersEvidence if one
of the headers is committed from this full node's perspective
This simplifies the code. Plus, if there are multiple forks, we'll
likely to receive multiple ConflictingHeadersEvidence anyway.
* swap CommitSig with Vote in LunaticValidatorEvidence
Vote is needed to validate signature
* no need to embed client
http is a provider and should not be used as a client
## Description
ADR to address the process for proving an amnesia attack (as a form of global evidence) from `PotentialAmnesiaEvidence` detected by light clients
______
For contributor use:
- [ ] Wrote tests
- [ ] Updated CHANGELOG_PENDING.md
- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Updated relevant documentation (`docs/`) and code comments
- [ ] Re-reviewed `Files changed` in the Github PR explorer
Closes: #4537
Uses SignedHeaderBefore to find header before unverified header and then bisection to verify the header. Only when header is between first and last trusted header height else if before the first trusted header height then regular backwards verification is used.
* adr: crypto encoding for proto work
- this adr is meant to help with deciding on how to move forward with keys in tendermint.
* minor change
* fix gomod
* add a third option
* fix spelling
* add first part of descision
* breakdown keys and where they are used
* add some wording
* minor wording fix
* question
* change proto messages
* minor update
* undo go.mod changes
* add a few things based on comemnts
* push, push it real good
* minor explanation on interface type
* touch up
error itself is not enough since it only signals if there were any
errors. Either (types.SignedHeader) or (success bool) is needed to
indicate the status of the operation. Returning a header is optimal
since most of the clients will want to get a newly verified header
anyway.
We first introduced auto-update as a separate struct AutoClient, which
was wrapping Client and calling Update periodically.
// AutoClient can auto update itself by fetching headers every N seconds.
type AutoClient struct {
base *Client
updatePeriod time.Duration
quit chan struct{}
trustedHeaders chan *types.SignedHeader
errs chan error
}
// NewAutoClient creates a new client and starts a polling goroutine.
func NewAutoClient(base *Client, updatePeriod time.Duration) *AutoClient {
c := &AutoClient{
base: base,
updatePeriod: updatePeriod,
quit: make(chan struct{}),
trustedHeaders: make(chan *types.SignedHeader),
errs: make(chan error),
}
go c.autoUpdate()
return c
}
// TrustedHeaders returns a channel onto which new trusted headers are posted.
func (c *AutoClient) TrustedHeaders() <-chan *types.SignedHeader {
return c.trustedHeaders
}
// Err returns a channel onto which errors are posted.
func (c *AutoClient) Errs() <-chan error {
return c.errs
}
// Stop stops the client.
func (c *AutoClient) Stop() {
close(c.quit)
}
func (c *AutoClient) autoUpdate() {
ticker := time.NewTicker(c.updatePeriod)
defer ticker.Stop()
for {
select {
case <-ticker.C:
lastTrustedHeight, err := c.base.LastTrustedHeight()
if err != nil {
c.errs <- err
continue
}
if lastTrustedHeight == -1 {
// no headers yet => wait
continue
}
newTrustedHeader, err := c.base.Update(time.Now())
if err != nil {
c.errs <- err
continue
}
if newTrustedHeader != nil {
c.trustedHeaders <- newTrustedHeader
}
case <-c.quit:
return
}
}
}
Later we merged it into the Client itself with the assumption that most clients will want it.
But now I am not sure. Neither IBC nor cosmos/relayer are using it. It increases complexity (Start/Stop methods).
That said, I think it makes sense to remove it until we see a need for it (until we better understand usage behavior). We can always introduce it later 😅. Maybe in the form of AutoClient.
closes: #4455
Verifying backwards checks that the trustedHeader hasn't expired both before and after the loop in case of verifying many headers (a longer operation), but not during the loop itself.
TrustedHeader() no longer checks whether the header saved in the store has expired.
Tests have been updated to reflect the changes
## Commits:
* verify headers backwards out of trust period
* removed expiration check in trusted header func
* modified tests to reflect changes
* wrote new tests for backwards verification
* modified TrustedHeader and TrustedValSet functions
* condensed test functions
* condensed test functions further
* fix build error
* update doc
* add comments
* remove unnecessary declaration
* extract latestHeight check into a separate func
Co-authored-by: Callum Waters <cmwaters19@gmail.com>
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
The work includes the reactor which ties together all the seperate routines involved in the design of the blockchain v2 refactor. This PR replaces #4067 which got far too large and messy after a failed attempt to rebase.
## Commits:
* Blockchainv 2 reactor:
+ I cleaner copy of the work done in #4067 which fell too far behind and was a nightmare to rebase.
+ The work includes the reactor which ties together all the seperate routines involved in the design of the blockchain v2 refactor.
* fixes after merge
* reorder iIO interface methodset
* change iO -> IO
* panic before send nil block
* rename switchToConsensus -> trySwitchToConsensus
* rename tdState -> tmState
* Update blockchain/v2/reactor.go
Co-Authored-By: Bot from GolangCI <42910462+golangcibot@users.noreply.github.com>
* remove peer when it sends a block unsolicited
* check for not ready in markReceived
* fix error
* fix the pcFinished event
* typo fix
* add documentation for processor fields
* simplify time.Since
* try and make the linter happy
* some doc updates
* fix channel diagram
* Update adr-043-blockchain-riri-org.md
* panic on nil switch
* liting fixes
* account for nil block in bBlockResponseMessage
* panic on duplicate block enqueued by processor
* linting
* goimport reactor_test.go
Co-authored-by: Bot from GolangCI <42910462+golangcibot@users.noreply.github.com>
Co-authored-by: Anca Zamfir <ancazamfir@users.noreply.github.com>
Co-authored-by: Marko <marbar3778@yahoo.com>
Co-authored-by: Anton Kaliaev <anton.kalyaev@gmail.com>
* update theme
* Update version
* Updated Questions section in the footer
* Remove links to Riot chat
* Typo
* Add Discord link
Co-authored-by: Marko <marbar3778@yahoo.com>
* adr: light client implementation
Closes#2133
* note on chain IDs
* explain why witnesses are required
* if chain forks maliciously, chain ID stays the same
* add a note about min witnesses while cross-checking
* docs: minor doc fixes
- minor doc fixes that i ran into while reading things
- test if we have github actions
Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>
* no github actions yet
* add with
* revert and change wording
* Separate ADR Tendermint Mode from ADR-051
* Update docs/architecture/adr-052-tendermint-mode.md
Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com>
* Apply suggestions from code review
Co-Authored-By: Marko <marbar3778@yahoo.com>
* Apply suggestions from code review
Co-Authored-By: Marko <marbar3778@yahoo.com>
* remove line of mode info of rpc
* Add link to ADR table of contents
Co-authored-by: Anton Kaliaev <anton.kalyaev@gmail.com>
Co-authored-by: Marko <marbar3778@yahoo.com>
Fullnode mode : fullnode mode does not have any capability to participate on consensus
Validator mode : this mode is exactly same as existing state machine behavior. sync without voting on consensus, and participate consensus when fully synced
Seed mode : lightweight seed mode only for maintain an address book, p2p like TenderSeed
Separate ADR Tendermint Mode from ADR-051 #4262
* libs/common: Refactor libs/common 01
Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>
* regenerate proto files, move intslice to where its used
* update kv.KVPair(s) to kv.Pair(s)
* add changelog entry
* make intInSlice private
* docs theme
* vuepress-theme-cosmos
* version bump
* changes to docs
* more code changes
* sidebar order fix
* moar changes
* fixed dev sessions title
* fixed dev sessions title, again
* specs should show up in sidebar
* contents cards
* version bump
* sidebar, rpc
* version bump
* custom footer and super naive search
* version
* minor change to vuepress
* move swagger file
* pre and post scripts
* build
* changed docs build process
* added deployment config
* updated versions file and added deployment filters
* Initiat commit of lite client with
with weak subjectivity ADR
* Apply suggestions from code review
Co-Authored-By: Marko <marbar3778@yahoo.com>
* Update docs/architecture/adr-044-lite-client-with-weak-subjectivity.md
Co-Authored-By: Christopher Goes <cwgoes@pluranimity.org>
* Apply suggestions from code review
Co-Authored-By: Christopher Goes <cwgoes@pluranimity.org>
* Apply suggestions from code review
Co-Authored-By: Anca Zamfir <ancazamfir@users.noreply.github.com>
* fix typo and format the code block
* address cwgoes comments
* add Positive/Negative points
* change status to accepted
* Apply suggestions from code review
Co-Authored-By: Christopher Goes <cwgoes@pluranimity.org>
* link the spec and explain headers caching
* ADR TOC in readme.md
* Added A TOC to the Readme.md of ADR Section
- Added table of contents to the Readme of the architecture section.
- Easier to traverse and when you know what is there.
- If the Adr's become viewable online it would help guide the user
Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>
* add tm-cmn to subprojects
* normalize word
* Quick link fixes throughout docs and repo
- used markdown link tester to find broken links
Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>
* minor change remove slash
* pr comments
* minor fix
* remove docker.develop
* remove master tag
* [adr] First draft on adr-042
* fix diagram urls
* Update docs/architecture/adr-042-blockchain-riri-org.md
Co-Authored-By: Marko <marbar3778@yahoo.com>
* Update docs/architecture/adr-042-blockchain-riri-org.md
Co-Authored-By: Marko <marbar3778@yahoo.com>
* Update docs/architecture/adr-042-blockchain-riri-org.md
Co-Authored-By: Marko <marbar3778@yahoo.com>
* add go syntax highlight
* more highlighting
* consistency fixes
* Add references
* new adr number
* Fixes based on feedback
* aditional state info
* Add details on getSchedule
* replace spaces with tabs
* fixes based on feedback
* add clarity around r.msgs
* clarify block processing
* fix off by one error
* additional details on ioRoutine
* Update docs/architecture/adr-043-blockchain-riri-org.md
Co-Authored-By: Anca Zamfir <ancazamfir@users.noreply.github.com>
* VoteSignBytes builds CanonicalVote
* CommitVotes implements VoteSetReader
- new CommitVotes struct holds both the Commit and the ValidatorSet and
implements VoteSetReader
- ToVote takes a ValidatorSet
* fix TestCommit
* use CommitSig.BlockID
Commits may include votes for a different BlockID, could be nil,
or different altogether. This means we can't use `commit.BlockID`
for reconstructing the sign bytes, since up to -1/3 of the commits
might be for independent BlockIDs. This means CommitSig will need to
include an indicator for what BlockID it signed - if it's not the
committed one or nil, it will need to include it fully in order to be
verified. This is unfortunate but unavoidable so long as we include
votes for non-committed BlockIDs (which we do to track validator
liveness)
* fixes from review
* remove CommitVotes. CommitSig contains address
* remove commit.canonicalVote method
* toVote -> getVote, takes valIdx
* update adr-025
* commit.ToVoteSet -> CommitToVoteSet
* add test
* fix from review
Marko
Callum Waters
Erik Grinaker
Anton Kaliaev
mergify[bot]
Erik Grinaker
Sean Braithwaite
Denis Fadeev
dongsamb
b-harvest
Ethan Buchman
Zaki Manian
Zarko Milosevic
Mostafa Sedaghat Joo
Daniil Lashin
Ismail Khoffi