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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
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
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
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
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
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
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
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
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
  1. package db
  2. import (
  3. "encoding/binary"
  4. "fmt"
  5. "regexp"
  6. "strconv"
  7. "github.com/gogo/protobuf/proto"
  8. dbm "github.com/tendermint/tm-db"
  9. tmsync "github.com/tendermint/tendermint/libs/sync"
  10. "github.com/tendermint/tendermint/light/store"
  11. tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
  12. "github.com/tendermint/tendermint/types"
  13. )
  14. var (
  15. sizeKey = []byte("size")
  16. )
  17. type dbs struct {
  18. db dbm.DB
  19. prefix string
  20. mtx tmsync.RWMutex
  21. size uint16
  22. }
  23. // New returns a Store that wraps any DB (with an optional prefix in case you
  24. // want to use one DB with many light clients).
  25. func New(db dbm.DB, prefix string) store.Store {
  26. size := uint16(0)
  27. bz, err := db.Get(sizeKey)
  28. if err == nil && len(bz) > 0 {
  29. size = unmarshalSize(bz)
  30. }
  31. return &dbs{db: db, prefix: prefix, size: size}
  32. }
  33. // SaveSignedHeaderAndValidatorSet persists SignedHeader and ValidatorSet to
  34. // the db.
  35. //
  36. // Safe for concurrent use by multiple goroutines.
  37. func (s *dbs) SaveSignedHeaderAndValidatorSet(sh *types.SignedHeader, valSet *types.ValidatorSet) error {
  38. if sh.Height <= 0 {
  39. panic("negative or zero height")
  40. }
  41. pbsh := sh.ToProto()
  42. shBz, err := proto.Marshal(pbsh)
  43. if err != nil {
  44. return fmt.Errorf("marshalling SignedHeader: %w", err)
  45. }
  46. pbvs, err := valSet.ToProto()
  47. if err != nil {
  48. return fmt.Errorf("unable to transition validator set to protobuf: %w", err)
  49. }
  50. valSetBz, err := proto.Marshal(pbvs)
  51. if err != nil {
  52. return fmt.Errorf("marshalling validator set: %w", err)
  53. }
  54. s.mtx.Lock()
  55. defer s.mtx.Unlock()
  56. b := s.db.NewBatch()
  57. defer b.Close()
  58. if err = b.Set(s.shKey(sh.Height), shBz); err != nil {
  59. return err
  60. }
  61. if err = b.Set(s.vsKey(sh.Height), valSetBz); err != nil {
  62. return err
  63. }
  64. if err = b.Set(sizeKey, marshalSize(s.size+1)); err != nil {
  65. return err
  66. }
  67. if err = b.WriteSync(); err != nil {
  68. return err
  69. }
  70. s.size++
  71. return nil
  72. }
  73. // DeleteSignedHeaderAndValidatorSet deletes SignedHeader and ValidatorSet from
  74. // the db.
  75. //
  76. // Safe for concurrent use by multiple goroutines.
  77. func (s *dbs) DeleteSignedHeaderAndValidatorSet(height int64) error {
  78. if height <= 0 {
  79. panic("negative or zero height")
  80. }
  81. s.mtx.Lock()
  82. defer s.mtx.Unlock()
  83. b := s.db.NewBatch()
  84. defer b.Close()
  85. if err := b.Delete(s.shKey(height)); err != nil {
  86. return err
  87. }
  88. if err := b.Delete(s.vsKey(height)); err != nil {
  89. return err
  90. }
  91. if err := b.Set(sizeKey, marshalSize(s.size-1)); err != nil {
  92. return err
  93. }
  94. if err := b.WriteSync(); err != nil {
  95. return err
  96. }
  97. s.size--
  98. return nil
  99. }
  100. // SignedHeader loads SignedHeader at the given height.
  101. //
  102. // Safe for concurrent use by multiple goroutines.
  103. func (s *dbs) SignedHeader(height int64) (*types.SignedHeader, error) {
  104. if height <= 0 {
  105. panic("negative or zero height")
  106. }
  107. bz, err := s.db.Get(s.shKey(height))
  108. if err != nil {
  109. panic(err)
  110. }
  111. if len(bz) == 0 {
  112. return nil, store.ErrSignedHeaderNotFound
  113. }
  114. var pbsh tmproto.SignedHeader
  115. err = proto.Unmarshal(bz, &pbsh)
  116. if err != nil {
  117. return nil, err
  118. }
  119. signedHeader, err := types.SignedHeaderFromProto(&pbsh)
  120. if err != nil {
  121. return nil, err
  122. }
  123. return signedHeader, err
  124. }
  125. // ValidatorSet loads ValidatorSet at the given height.
  126. //
  127. // Safe for concurrent use by multiple goroutines.
  128. func (s *dbs) ValidatorSet(height int64) (*types.ValidatorSet, error) {
  129. if height <= 0 {
  130. panic("negative or zero height")
  131. }
  132. bz, err := s.db.Get(s.vsKey(height))
  133. if err != nil {
  134. panic(err)
  135. }
  136. if len(bz) == 0 {
  137. return nil, store.ErrValidatorSetNotFound
  138. }
  139. var pbvs tmproto.ValidatorSet
  140. err = proto.Unmarshal(bz, &pbvs)
  141. if err != nil {
  142. return nil, err
  143. }
  144. valSet, err := types.ValidatorSetFromProto(&pbvs)
  145. if err != nil {
  146. return nil, err
  147. }
  148. return valSet, err
  149. }
  150. // LastSignedHeaderHeight returns the last SignedHeader height stored.
  151. //
  152. // Safe for concurrent use by multiple goroutines.
  153. func (s *dbs) LastSignedHeaderHeight() (int64, error) {
  154. itr, err := s.db.ReverseIterator(
  155. s.shKey(1),
  156. append(s.shKey(1<<63-1), byte(0x00)),
  157. )
  158. if err != nil {
  159. panic(err)
  160. }
  161. defer itr.Close()
  162. for itr.Valid() {
  163. key := itr.Key()
  164. _, height, ok := parseShKey(key)
  165. if ok {
  166. return height, nil
  167. }
  168. itr.Next()
  169. }
  170. return -1, itr.Error()
  171. }
  172. // FirstSignedHeaderHeight returns the first SignedHeader height stored.
  173. //
  174. // Safe for concurrent use by multiple goroutines.
  175. func (s *dbs) FirstSignedHeaderHeight() (int64, error) {
  176. itr, err := s.db.Iterator(
  177. s.shKey(1),
  178. append(s.shKey(1<<63-1), byte(0x00)),
  179. )
  180. if err != nil {
  181. panic(err)
  182. }
  183. defer itr.Close()
  184. for itr.Valid() {
  185. key := itr.Key()
  186. _, height, ok := parseShKey(key)
  187. if ok {
  188. return height, nil
  189. }
  190. itr.Next()
  191. }
  192. return -1, itr.Error()
  193. }
  194. // SignedHeaderBefore iterates over headers until it finds a header before
  195. // the given height. It returns ErrSignedHeaderNotFound if no such header exists.
  196. //
  197. // Safe for concurrent use by multiple goroutines.
  198. func (s *dbs) SignedHeaderBefore(height int64) (*types.SignedHeader, error) {
  199. if height <= 0 {
  200. panic("negative or zero height")
  201. }
  202. itr, err := s.db.ReverseIterator(
  203. s.shKey(1),
  204. s.shKey(height),
  205. )
  206. if err != nil {
  207. panic(err)
  208. }
  209. defer itr.Close()
  210. for itr.Valid() {
  211. key := itr.Key()
  212. _, existingHeight, ok := parseShKey(key)
  213. if ok {
  214. return s.SignedHeader(existingHeight)
  215. }
  216. itr.Next()
  217. }
  218. if err = itr.Error(); err != nil {
  219. return nil, err
  220. }
  221. return nil, store.ErrSignedHeaderNotFound
  222. }
  223. // Prune prunes header & validator set pairs until there are only size pairs
  224. // left.
  225. //
  226. // Safe for concurrent use by multiple goroutines.
  227. func (s *dbs) Prune(size uint16) error {
  228. // 1) Check how many we need to prune.
  229. s.mtx.RLock()
  230. sSize := s.size
  231. s.mtx.RUnlock()
  232. if sSize <= size { // nothing to prune
  233. return nil
  234. }
  235. numToPrune := sSize - size
  236. // 2) Iterate over headers and perform a batch operation.
  237. itr, err := s.db.Iterator(
  238. s.shKey(1),
  239. append(s.shKey(1<<63-1), byte(0x00)),
  240. )
  241. if err != nil {
  242. return err
  243. }
  244. defer itr.Close()
  245. b := s.db.NewBatch()
  246. defer b.Close()
  247. pruned := 0
  248. for itr.Valid() && numToPrune > 0 {
  249. key := itr.Key()
  250. _, height, ok := parseShKey(key)
  251. if ok {
  252. if err = b.Delete(s.shKey(height)); err != nil {
  253. return err
  254. }
  255. if err = b.Delete(s.vsKey(height)); err != nil {
  256. return err
  257. }
  258. }
  259. itr.Next()
  260. numToPrune--
  261. pruned++
  262. }
  263. if err = itr.Error(); err != nil {
  264. return err
  265. }
  266. err = b.WriteSync()
  267. if err != nil {
  268. return err
  269. }
  270. // 3) Update size.
  271. s.mtx.Lock()
  272. defer s.mtx.Unlock()
  273. s.size -= uint16(pruned)
  274. if wErr := s.db.SetSync(sizeKey, marshalSize(s.size)); wErr != nil {
  275. return fmt.Errorf("failed to persist size: %w", wErr)
  276. }
  277. return nil
  278. }
  279. // Size returns the number of header & validator set pairs.
  280. //
  281. // Safe for concurrent use by multiple goroutines.
  282. func (s *dbs) Size() uint16 {
  283. s.mtx.RLock()
  284. defer s.mtx.RUnlock()
  285. return s.size
  286. }
  287. func (s *dbs) shKey(height int64) []byte {
  288. return []byte(fmt.Sprintf("sh/%s/%020d", s.prefix, height))
  289. }
  290. func (s *dbs) vsKey(height int64) []byte {
  291. return []byte(fmt.Sprintf("vs/%s/%020d", s.prefix, height))
  292. }
  293. var keyPattern = regexp.MustCompile(`^(sh|vs)/([^/]*)/([0-9]+)$`)
  294. func parseKey(key []byte) (part string, prefix string, height int64, ok bool) {
  295. submatch := keyPattern.FindSubmatch(key)
  296. if submatch == nil {
  297. return "", "", 0, false
  298. }
  299. part = string(submatch[1])
  300. prefix = string(submatch[2])
  301. height, err := strconv.ParseInt(string(submatch[3]), 10, 64)
  302. if err != nil {
  303. return "", "", 0, false
  304. }
  305. ok = true // good!
  306. return
  307. }
  308. func parseShKey(key []byte) (prefix string, height int64, ok bool) {
  309. var part string
  310. part, prefix, height, ok = parseKey(key)
  311. if part != "sh" {
  312. return "", 0, false
  313. }
  314. return
  315. }
  316. func marshalSize(size uint16) []byte {
  317. bs := make([]byte, 2)
  318. binary.LittleEndian.PutUint16(bs, size)
  319. return bs
  320. }
  321. func unmarshalSize(bz []byte) uint16 {
  322. return binary.LittleEndian.Uint16(bz)
  323. }