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lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite: follow up from #3989 (#4209) * rename adjusted to adjacent Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352140829 * rename ErrTooMuchChange to ErrNotEnoughVotingPowerSigned Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r352142785 * verify commit is properly signed * remove no longer trusted headers * restore trustedHeader and trustedNextVals * check trustedHeader using options Refs https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * use correct var when checking if headers are adjacent in bisection func + replace TODO with a comment https://github.com/tendermint/tendermint/pull/3989#discussion_r352125455 * return header in VerifyHeaderAtHeight because that way we avoid DB call + add godoc comments + check if there are no headers yet in AutoClient https://github.com/tendermint/tendermint/pull/3989#pullrequestreview-315454506 * TestVerifyAdjacentHeaders: add 2 more test-cases + add TestVerifyReturnsErrorIfTrustLevelIsInvalid * lite: avoid overflow when parsing key in db store! * lite: rename AutoClient#Err to Errs * lite: add a test for AutoClient * lite: fix keyPattern and call itr.Next in db store * lite: add two tests for db store * lite: add TestClientRemovesNoLongerTrustedHeaders * lite: test Client#Cleanup * lite: test restoring trustedHeader https://github.com/tendermint/tendermint/pull/4209#issuecomment-562462165 * lite: comment out unused code in test_helpers * fix TestVerifyReturnsErrorIfTrustLevelIsInvalid after merge * change defaultRemoveNoLongerTrustedHeadersPeriod and add docs * write more doc * lite: uncomment testable examples * use stdlog.Fatal to stop AutoClient tests * make lll linter happy * separate errors for 2 cases - the validator set of a skipped header cannot be trusted, i.e. <1/3rd of h1 validator set has signed (new error, something like ErrNewValSetCantBeTrusted) - the validator set is trusted but < 2/3rds has signed (ErrNewHeaderCantBeTrusted) https://github.com/tendermint/tendermint/pull/4209#discussion_r360331253 * remove all headers (even the last one) that are outside of the trusting period. By doing this, we avoid checking the trustedHeader's hash in checkTrustedHeaderUsingOptions (case #1). https://github.com/tendermint/tendermint/pull/4209#discussion_r360332460 * explain restoreTrustedHeaderAndNextVals better https://github.com/tendermint/tendermint/pull/4209#discussion_r360602328 * add ConfirmationFunction option for optionally prompting for user input Y/n before removing headers Refs https://github.com/tendermint/tendermint/pull/4209#discussion_r360602945 * make cleaning optional https://github.com/tendermint/tendermint/pull/4209#discussion_r364838189 * return error when user refused to remove headers * check for double votes in VerifyCommitTrusting * leave only ErrNewValSetCantBeTrusted error to differenciate between h2Vals.VerifyCommit and h1NextVals.VerifyCommitTrusting * fix example tests * remove unnecessary if condition https://github.com/tendermint/tendermint/pull/4209#discussion_r365171847 It will be handled by the above switch. * verifyCommitBasic does not depend on vals Co-authored-by: Marko <marbar3778@yahoo.com>
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
lite2: light client with weak subjectivity (#3989) Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
5 years ago
  1. package lite_test
  2. import (
  3. "fmt"
  4. "testing"
  5. "time"
  6. "github.com/stretchr/testify/assert"
  7. tmmath "github.com/tendermint/tendermint/libs/math"
  8. lite "github.com/tendermint/tendermint/lite2"
  9. "github.com/tendermint/tendermint/types"
  10. )
  11. const (
  12. maxClockDrift = 10 * time.Second
  13. )
  14. func TestVerifyAdjacentHeaders(t *testing.T) {
  15. const (
  16. chainID = "TestVerifyAdjacentHeaders"
  17. lastHeight = 1
  18. nextHeight = 2
  19. )
  20. var (
  21. keys = genPrivKeys(4)
  22. // 20, 30, 40, 50 - the first 3 don't have 2/3, the last 3 do!
  23. vals = keys.ToValidators(20, 10)
  24. bTime, _ = time.Parse(time.RFC3339, "2006-01-02T15:04:05Z")
  25. header = keys.GenSignedHeader(chainID, lastHeight, bTime, nil, vals, vals,
  26. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys))
  27. )
  28. testCases := []struct {
  29. newHeader *types.SignedHeader
  30. newVals *types.ValidatorSet
  31. trustingPeriod time.Duration
  32. now time.Time
  33. expErr error
  34. expErrText string
  35. }{
  36. // same header -> no error
  37. 0: {
  38. header,
  39. vals,
  40. 3 * time.Hour,
  41. bTime.Add(2 * time.Hour),
  42. nil,
  43. "headers must be adjacent in height",
  44. },
  45. // different chainID -> error
  46. 1: {
  47. keys.GenSignedHeader("different-chainID", nextHeight, bTime.Add(1*time.Hour), nil, vals, vals,
  48. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  49. vals,
  50. 3 * time.Hour,
  51. bTime.Add(2 * time.Hour),
  52. nil,
  53. "untrustedHeader.ValidateBasic failed: signedHeader belongs to another chain 'different-chainID' not" +
  54. " 'TestVerifyAdjacentHeaders'",
  55. },
  56. // new header's time is before old header's time -> error
  57. 2: {
  58. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(-1*time.Hour), nil, vals, vals,
  59. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  60. vals,
  61. 3 * time.Hour,
  62. bTime.Add(2 * time.Hour),
  63. nil,
  64. "to be after old header time",
  65. },
  66. // new header's time is from the future -> error
  67. 3: {
  68. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(3*time.Hour), nil, vals, vals,
  69. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  70. vals,
  71. 3 * time.Hour,
  72. bTime.Add(2 * time.Hour),
  73. nil,
  74. "new header has a time from the future",
  75. },
  76. // new header's time is from the future, but it's acceptable (< maxClockDrift) -> no error
  77. 4: {
  78. keys.GenSignedHeader(chainID, nextHeight,
  79. bTime.Add(2*time.Hour).Add(maxClockDrift).Add(-1*time.Millisecond), nil, vals, vals,
  80. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  81. vals,
  82. 3 * time.Hour,
  83. bTime.Add(2 * time.Hour),
  84. nil,
  85. "",
  86. },
  87. // 3/3 signed -> no error
  88. 5: {
  89. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(1*time.Hour), nil, vals, vals,
  90. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  91. vals,
  92. 3 * time.Hour,
  93. bTime.Add(2 * time.Hour),
  94. nil,
  95. "",
  96. },
  97. // 2/3 signed -> no error
  98. 6: {
  99. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(1*time.Hour), nil, vals, vals,
  100. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 1, len(keys)),
  101. vals,
  102. 3 * time.Hour,
  103. bTime.Add(2 * time.Hour),
  104. nil,
  105. "",
  106. },
  107. // 1/3 signed -> error
  108. 7: {
  109. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(1*time.Hour), nil, vals, vals,
  110. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), len(keys)-1, len(keys)),
  111. vals,
  112. 3 * time.Hour,
  113. bTime.Add(2 * time.Hour),
  114. lite.ErrInvalidHeader{Reason: types.ErrNotEnoughVotingPowerSigned{Got: 50, Needed: 93}},
  115. "",
  116. },
  117. // vals does not match with what we have -> error
  118. 8: {
  119. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(1*time.Hour), nil, keys.ToValidators(10, 1), vals,
  120. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  121. keys.ToValidators(10, 1),
  122. 3 * time.Hour,
  123. bTime.Add(2 * time.Hour),
  124. nil,
  125. "to match those from new header",
  126. },
  127. // vals are inconsistent with newHeader -> error
  128. 9: {
  129. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(1*time.Hour), nil, vals, vals,
  130. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  131. keys.ToValidators(10, 1),
  132. 3 * time.Hour,
  133. bTime.Add(2 * time.Hour),
  134. nil,
  135. "to match those that were supplied",
  136. },
  137. // old header has expired -> error
  138. 10: {
  139. keys.GenSignedHeader(chainID, nextHeight, bTime.Add(1*time.Hour), nil, vals, vals,
  140. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  141. keys.ToValidators(10, 1),
  142. 1 * time.Hour,
  143. bTime.Add(1 * time.Hour),
  144. nil,
  145. "old header has expired",
  146. },
  147. }
  148. for i, tc := range testCases {
  149. tc := tc
  150. t.Run(fmt.Sprintf("#%d", i), func(t *testing.T) {
  151. err := lite.VerifyAdjacent(chainID, header, tc.newHeader, tc.newVals, tc.trustingPeriod, tc.now, maxClockDrift)
  152. switch {
  153. case tc.expErr != nil && assert.Error(t, err):
  154. assert.Equal(t, tc.expErr, err)
  155. case tc.expErrText != "":
  156. assert.Contains(t, err.Error(), tc.expErrText)
  157. default:
  158. assert.NoError(t, err)
  159. }
  160. })
  161. }
  162. }
  163. func TestVerifyNonAdjacentHeaders(t *testing.T) {
  164. const (
  165. chainID = "TestVerifyNonAdjacentHeaders"
  166. lastHeight = 1
  167. )
  168. var (
  169. keys = genPrivKeys(4)
  170. // 20, 30, 40, 50 - the first 3 don't have 2/3, the last 3 do!
  171. vals = keys.ToValidators(20, 10)
  172. bTime, _ = time.Parse(time.RFC3339, "2006-01-02T15:04:05Z")
  173. header = keys.GenSignedHeader(chainID, lastHeight, bTime, nil, vals, vals,
  174. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys))
  175. // 30, 40, 50
  176. twoThirds = keys[1:]
  177. twoThirdsVals = twoThirds.ToValidators(30, 10)
  178. // 50
  179. oneThird = keys[len(keys)-1:]
  180. oneThirdVals = oneThird.ToValidators(50, 10)
  181. // 20
  182. lessThanOneThird = keys[0:1]
  183. lessThanOneThirdVals = lessThanOneThird.ToValidators(20, 10)
  184. )
  185. testCases := []struct {
  186. newHeader *types.SignedHeader
  187. newVals *types.ValidatorSet
  188. trustingPeriod time.Duration
  189. now time.Time
  190. expErr error
  191. expErrText string
  192. }{
  193. // 3/3 new vals signed, 3/3 old vals present -> no error
  194. 0: {
  195. keys.GenSignedHeader(chainID, 3, bTime.Add(1*time.Hour), nil, vals, vals,
  196. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys)),
  197. vals,
  198. 3 * time.Hour,
  199. bTime.Add(2 * time.Hour),
  200. nil,
  201. "",
  202. },
  203. // 2/3 new vals signed, 3/3 old vals present -> no error
  204. 1: {
  205. keys.GenSignedHeader(chainID, 4, bTime.Add(1*time.Hour), nil, vals, vals,
  206. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 1, len(keys)),
  207. vals,
  208. 3 * time.Hour,
  209. bTime.Add(2 * time.Hour),
  210. nil,
  211. "",
  212. },
  213. // 1/3 new vals signed, 3/3 old vals present -> error
  214. 2: {
  215. keys.GenSignedHeader(chainID, 5, bTime.Add(1*time.Hour), nil, vals, vals,
  216. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), len(keys)-1, len(keys)),
  217. vals,
  218. 3 * time.Hour,
  219. bTime.Add(2 * time.Hour),
  220. lite.ErrInvalidHeader{types.ErrNotEnoughVotingPowerSigned{Got: 50, Needed: 93}},
  221. "",
  222. },
  223. // 3/3 new vals signed, 2/3 old vals present -> no error
  224. 3: {
  225. twoThirds.GenSignedHeader(chainID, 5, bTime.Add(1*time.Hour), nil, twoThirdsVals, twoThirdsVals,
  226. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(twoThirds)),
  227. twoThirdsVals,
  228. 3 * time.Hour,
  229. bTime.Add(2 * time.Hour),
  230. nil,
  231. "",
  232. },
  233. // 3/3 new vals signed, 1/3 old vals present -> no error
  234. 4: {
  235. oneThird.GenSignedHeader(chainID, 5, bTime.Add(1*time.Hour), nil, oneThirdVals, oneThirdVals,
  236. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(oneThird)),
  237. oneThirdVals,
  238. 3 * time.Hour,
  239. bTime.Add(2 * time.Hour),
  240. nil,
  241. "",
  242. },
  243. // 3/3 new vals signed, less than 1/3 old vals present -> error
  244. 5: {
  245. lessThanOneThird.GenSignedHeader(chainID, 5, bTime.Add(1*time.Hour), nil, lessThanOneThirdVals, lessThanOneThirdVals,
  246. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(lessThanOneThird)),
  247. lessThanOneThirdVals,
  248. 3 * time.Hour,
  249. bTime.Add(2 * time.Hour),
  250. lite.ErrNewValSetCantBeTrusted{types.ErrNotEnoughVotingPowerSigned{Got: 20, Needed: 46}},
  251. "",
  252. },
  253. }
  254. for i, tc := range testCases {
  255. tc := tc
  256. t.Run(fmt.Sprintf("#%d", i), func(t *testing.T) {
  257. err := lite.VerifyNonAdjacent(chainID, header, vals, tc.newHeader, tc.newVals, tc.trustingPeriod,
  258. tc.now, maxClockDrift,
  259. lite.DefaultTrustLevel)
  260. switch {
  261. case tc.expErr != nil && assert.Error(t, err):
  262. assert.Equal(t, tc.expErr, err)
  263. case tc.expErrText != "":
  264. assert.Contains(t, err.Error(), tc.expErrText)
  265. default:
  266. assert.NoError(t, err)
  267. }
  268. })
  269. }
  270. }
  271. func TestVerifyReturnsErrorIfTrustLevelIsInvalid(t *testing.T) {
  272. const (
  273. chainID = "TestVerifyReturnsErrorIfTrustLevelIsInvalid"
  274. lastHeight = 1
  275. )
  276. var (
  277. keys = genPrivKeys(4)
  278. // 20, 30, 40, 50 - the first 3 don't have 2/3, the last 3 do!
  279. vals = keys.ToValidators(20, 10)
  280. bTime, _ = time.Parse(time.RFC3339, "2006-01-02T15:04:05Z")
  281. header = keys.GenSignedHeader(chainID, lastHeight, bTime, nil, vals, vals,
  282. []byte("app_hash"), []byte("cons_hash"), []byte("results_hash"), 0, len(keys))
  283. )
  284. err := lite.Verify(chainID, header, vals, header, vals, 2*time.Hour, time.Now(), maxClockDrift,
  285. tmmath.Fraction{Numerator: 2, Denominator: 1})
  286. assert.Error(t, err)
  287. }
  288. func TestValidateTrustLevel(t *testing.T) {
  289. testCases := []struct {
  290. lvl tmmath.Fraction
  291. valid bool
  292. }{
  293. // valid
  294. 0: {tmmath.Fraction{Numerator: 1, Denominator: 1}, true},
  295. 1: {tmmath.Fraction{Numerator: 1, Denominator: 3}, true},
  296. 2: {tmmath.Fraction{Numerator: 2, Denominator: 3}, true},
  297. 3: {tmmath.Fraction{Numerator: 3, Denominator: 3}, true},
  298. 4: {tmmath.Fraction{Numerator: 4, Denominator: 5}, true},
  299. // invalid
  300. 5: {tmmath.Fraction{Numerator: 6, Denominator: 5}, false},
  301. 6: {tmmath.Fraction{Numerator: -1, Denominator: 3}, false},
  302. 7: {tmmath.Fraction{Numerator: 0, Denominator: 1}, false},
  303. 8: {tmmath.Fraction{Numerator: -1, Denominator: -3}, false},
  304. 9: {tmmath.Fraction{Numerator: 0, Denominator: 0}, false},
  305. 10: {tmmath.Fraction{Numerator: 1, Denominator: 0}, false},
  306. }
  307. for _, tc := range testCases {
  308. err := lite.ValidateTrustLevel(tc.lvl)
  309. if !tc.valid {
  310. assert.Error(t, err)
  311. } else {
  312. assert.NoError(t, err)
  313. }
  314. }
  315. }