Change Log

All notables changes to this project are documented in this file.

The format is inspired by Keep a Changelog.

20.12 (2020-11-03)

Protocol	Version
Consensus	2.0.0
Runtime Host	1.0.0
Runtime Committee	1.0.0

Removals and Breaking Changes

go/common/crypto: Bump ed25519 version (#3458, #3470, #3471)

Configuration Changes

go/runtime/scheduling: Max queue size flag rename (#3434)
- worker.executor.schedule_max_queue_size -> worker.executor.schedule_max_tx_pool_size
go/runtime/client: Add max transaction age (#3443)

Added runtime.client.max_transaction_age flag to configure number of consensus blocks after which a submitted runtime transaction is considered expired. Expired transactions are dropped by the client.

Features

go/runtime/scheduler: Switch to an ordered queue tx pool implementation (#3434)

Bug Fixes

go/runtime/client: Runtime client should retry processing any failed blocks (#3412)
go/storage/client: Retry ErrNodeNotFound errors on write requests (#3424)
go/worker/common: check if active epoch exists in HandlePeerMsg (#3432)

Fixes nil pointer dereference that can happen if the executor node tries to publish a message before it is synced
go/runtime/client: Wait for initial consensus block and group version (#3443)

Before, the runtime client would publish invalid messages before obtaining the initial group version. The messages were correctly retired upon receiving the group version, but this resulted in needless messages.
Storage node should update access control policy on new node registrations (#3453)

Before, the storage node only updated policy when existing nodes updated registrations or committee changed. This missed the case when new storage node registered mid-epoch.
rust: Bump futures to 0.3.7 (#3460)

Fixes RUSTSEC-2020-0059.

20.11.3 (2020-10-16)

Protocol	Version
Consensus	1.0.0
Runtime Host	1.0.0
Runtime Committee	1.0.0

Bug Fixes

go/storage/mkvs: Fix Finalize after checkpoint restore (#3330)

Internal Changes

go/storage/mkvs: Add node tracking to chunk restore (#3241)
go: Add ability to set initial block height at genesis (#3416)

20.11.2 (2020-10-13)

Protocol	Version
Consensus	1.0.0
Runtime Host	1.0.0
Runtime Committee	1.0.0

Features

go/runtime/client: remove unneeded P2P message republishing (#3325)

Bug Fixes

go/worker/p2p: Skip peer authentication for our own messages (#3319)

In practice this fixes a bug in a setup where executor nodes are used to submit runtime transactions. The executor nodes that are not part of the active committee, would end up self-rejecting transaction messages.
go/worker/executor: don't unnecessarily hold the lock during storage requests (#3320)
go/worker/executor: only remove incoming transactions on finalized round (#3332)

Simplifies the executor to only remove transactions from the incoming queue once a round is successfully finalized. Before, the proposing executor also removed transactions when proposing a batch, which was an unneeded leftover from before the transaction scheduler committee was merged with into executor.

Also fixes an edge case where batch was not reinserted on failed rounds.
go/worker/common/committee: group version should be the epoch block (#3347)

When node is restarted, EpochTransition is called on the first received block, which is not necessary the actual epoch transition block. Therefore the epoch block needs to be queried to obtain the correct group version.
go: Seed node support configuring tendermint P2P settings (#3356)

Seed node now supports configuring relevant tendermint P2P settings via existing tendermint configuration flags.
go: Seed node panics on oasis-node control CLI (#3356)

Seed node now implements the missing consensus backend methods and supports oasis-node control CLI.
go/worker/p2p: Correctly update peers on WatchNodeList events (#3378)
go/registry.WatchNodeList: return current node list upon subscription (#3379)
go/worker/p2p: Relay some permanent errors (#3386)

Before the P2P worker would not relay any messages failing with a permanent error. However there are cases where the client should permanently fail the dispatch, but still relay the message to peers.

Adds Relayable error wrapper which can be used in handlers to notify that a message should be relayed regardless if the error is permanent or not.
go/worker/p2p: Retry messages we consider permanent (#3386)

p2pError.IsPermanent notion of a permanent error differs from the upstream cenkalti/backoff/v4 notion. Correctly retry on context.Canceled errors as we don't consider them permanent.
go/consensus/tendermint: Backport bug fixes (#3398)

Internal Changes

go/backoff: Update cenkalti/backoff to 4.1.0 (#3390)
rust: bump crossbeam from 0.7.3 to 0.8.0 (#3394)

20.11.1 (2020-10-07)

Protocol	Version
Consensus	1.0.0
Runtime Host	1.0.0
Runtime Committee	1.0.0

Features

go/consensus: add last retained block information (#3348)

New in the consensus API, the status struct now has information about the earliest block available on this node. This differs from the genesis block when pruning is enabled.

Internal Changes

go: Update to build on macOS (#3333)

20.11 (2020-09-23)

Protocol	Version
Consensus	1.0.0
Runtime Host	1.0.0
Runtime Committee	1.0.0

Configuration Changes

go/worker/p2p: Configurable libp2p buffer sizes (#3264)

Added worker.p2p.peer_outbound_queue_size and worker.p2p.validate_queue_size flags for configuring libp2p buffer sizes.

Features

Introduce the canonical form of a Genesis file (#2757)

This form is the pretty-printed JSON file with 2-space indents, where:
- Struct fields are encoded in the order in which they are defined in the corresponding struct definitions.
- Maps have their keys converted to strings which are then encoded in lexicographical order.
For more details, see the Genesis Document documentation.

The oasis-node genesis init and oasis-node genesis dump CLI commands are updated to output Genesis file in this canonical form.
go/staking/api: Add PrettyPrintCommissionScheduleIndexInfixes() helper (#3265)
go/staking/api: Update commission schedule rate and rate bound pretty prints (#3265)

Pretty print rates and rate bounds as enumerated lists to enable easier inspection of commission schedule (amendments) in combination with a hardware-based signer plugin.
go/worker/executor: Cache last seen runtime transactions (#3274)

To enable a basic form of runtime transaction replay prevention, the transaction scheduler maintains a LRU cache of last seen runtime transactions keyed by transaction hash.
go/worker/p2p: Use hash of the message payload as message ID (#3275)
go/oasis-node: Make oasis-node genesis check command check if form canonical (#3298)

Bug Fixes

runtime/client: Skip not yet published requests in retry check (#3264)
go/consensus/tendermint: Don't swallow recheck result errors (#3267)
go/runtime/client: Fix possible panic on shutdown (#3271)
go/worker/registration: Verify entity exists before node registration (#3286)

This avoids some cases of failed node registration transactions when the entity under which the node is being registered does not actually exist.
go/runtime/host/protocol: Set connection write deadline (#3289)

The RHP connection should have a write deadline to make sure that the connection is closed in case the runtime is not working.
go/worker/executor: Clear tx queue before returning to committee (#3300)

Fixes a bug where an executor returning to committee would propose stale transactions that it received right before exiting committee in previous epoch, due to a race condition between adding transaction to the queue and clearing the queue. Clearing the incoming queue is now done before node starts being a compute worker instead of after it stops being.
go/oasis-node: Start internal gRPC server before consensus backend (#3303)

Documentation Improvements

Document oasis-node genesis CLI commands (#3298)

Internal Changes

ci/txsource: Shut down nodes for longer period of time (#3223)
rust: Update tiny-keccak, hmac, sha2 dependencies (#3260)
go/extra/stats: Remove the unmaintained extra/stats tool (#3270)
go/oasis-test-runner: Add e2e/genesis-file scenario (#3278)
go/ci: Update nancy to 1.0.0 (#3283)
go/consensus/tests: Use explicit latest height when comparing query results (#3287)

Fixes flakiness in the test that occurred when a different height was used for the GetTransactions and GetTransactionsWithResults queries.
go/e2e/sentry: Sanity check consensus peers (#3291)

Sentry E2E test now ensures that validators running behind sentries only connect to their sentry nodes.
rust: Bump serde crates (#3294)
- serde_cbor@0.10.2 -> serde_cbor@0.11.1
- serde@1.0.71 -> serde@1.0.116
- serde_bytes@0.10.5 -> serde@0.11.5
rust: Bump snow version from 0.6.2 to 0.7.1 (#3296)
go: Bump github.com/golang/snappy from 0.0.1 to 0.0.2 (#3297)
rust: bump ed25519-dalek from 1.0.0 to 1.0.1 (#3299)

20.10 (2020-09-09)

Protocol	Version
Consensus	1.0.0
Runtime Host	1.0.0
Runtime Committee	1.0.0

Removals and Breaking Changes

go/staking: Remove WatchTransfers/Burns/Escrows in favor of WatchEvents (#3080)

The separate WatchTransfers/Burns/Escrows methods provided less information than the more general WatchEvents, namely they were missing the height and tx hash. There is no good reason to maintain both as the individual methods can be easily replaced with WatchEvents.
go/roothash: Drop support for multiple committees (#3179)

Since there is currently no transaction scheduler implementation which would support multiple committees, there is no sense in having the merge node as it could be a source of bugs.

The merge node is also the only client for the Merge* storage operations, so they can just be removed in order to reduce the exposed API surface.
go/worker/executor: Support multiple transaction schedulers (#3184)

Transaction scheduling committee is removed and the transaction scheduler worker is merged into the executor worker. Transaction scheduling gRPC service is removed and runtime transaction submission is now done via libp2p's gossipsub.

Each active executor worker now also acts as a transaction scheduler. Each round one of the executors acts as the scheduler and is expected to propose a batch for scheduling. Nodes switch between schedulers in round-robin fashion.

Metric changes:

Existing transaction scheduler incoming queue size metrics was renamed:
- oasis_worker_txnscheduler_incoming_queue_size -> oasis_worker_incoming_queue_size
go/runtime/scheduling: Rename "batching" algorithm to "simple" (#3184)

Note: Existing deployments will need to alter the state dump and fix the scheduling algorithm in all registered compute runtimes.
go/consensus/tendermint: Bump Tendermint Core to v0.34-rc4-oasis2 (#3186, #3229)
go/roothash: Add support for executor triggered timeouts (#3199)

Executors can now trigger a roothash timeout in case there are new transactions waiting to be proposed, but the current transaction scheduler is not proposing a batch. The timeout can only happen once sufficient (configurable via a new ProposerTimeout runtime parameter) consensus blocks pass since the round started. The proposer timeout causes the current round to fail.

Note: Existing deployments will need to alter the state dump to fix existing runtimes that do not have ProposerTimeout configured.
go/common/cbor: Bump fxamacker/cbor to bafca87fa6db (#3204)

This should result in some smaller payloads as omitempty should work better for our use cases now.
go/roothash: Change runtime round timeout to be in blocks (#3210)

Note: Existing deployments will need to alter the state dump and update the executor round timeout in all registered compute runtimes.
go/common/crypto/signature: Remove SignerRole.FromString() method (#3225)

Use the newly added SignerRole.UnmarshalText() method instead.
go/consensus: Simplify light client API (#3229)

Methods GetSignedHeader and GetValidatorSet have been replaced with GetLightBlock which provides both the signed header and the validator set. This makes sense as the two are commonly used together so this saves a round-trip.
release: Wrap files in the release tarball in a single directory (#3232)
release: Use SHA256SUMS-<VERSION>.txt name template for checksum files (#3232)
Bump protocol versions to 1.0.0 in preparation for the Mainnet (#3249)

As described in our Versioning scheme, we will bump the protocol versions (Consensus, Runtime Host, Runtime Committee) to version 1.0.0 when preparing an Oasis Core release for the Mainnet, which signifies they are ready for production use.

Configuration Changes

Added worker.p2p.enabled flag to explicitly enable P2P worker (#3184)

Note: compute workers will automatically enable the P2P worker. The P2P worker needs to be manually enabled on runtime-client nodes that want to submit runtime transactions.
go/worker/compute/executor: Remove transaction scheduler worker (#3184)

The worker.txn_scheduler.check_tx.enabled flag has been renamed to worker.executor.schedule_check_tx.enabled. The worker.txnscheduler.batching.max_queue_size flag has been renamed to worker.executor.schedule_max_queue_size.
go/runtime/scheduling: Rename "batching" algorithm to "simple" (#3184)

The following oasis-node registry runtime command line flags have been renamed:
- runtime.txn_scheduler.batching.max_batch_size to runtime.txn_scheduler.max_batch_size.
- runtime.txn_scheduler.batching.max_batch_size_bytes to runtime.txn_scheduler.max_batch_size_bytes.
go/common/crypto/signature: Use descriptive names for Signer roles (#3225)

The --signer.composite.backends CLI flag previously accepted integer-indexed Signer roles, e.g:
```
--signer.composite.backends 1:file,2:file,3:file,4:plugin
```
Now, it only accepts descriptive string names for Signer roles, e.g.:
```
--signer.composite.backends entity:file,node:file,p2p:file,consensus:plugin
```

Features

go/consensus/api/transaction: Pretty-print transaction's fee amount in tokens (#3151)
go/consensus/api/transaction: Implement PrettyPrinter interface for Fee (#3167)
go/staking/api/token: Initial implementation (#3167)
go/consensus/tendermint: Support configurable initial height (#3186)
go/consensus: Add the GetUnconfirmedTransactions method (#3187)

The new method allows the caller to query the current set of transactions in the mempool (e.g., known transactions which have not yet been included in a block).
go/consensus: Add ErrDuplicateTx error for duplicate transactions (#3192)
go/common/crypto/signature: Add new methods to SignerRole type (#3225)

Add String(), MarshalText() and UnmarshalText() methods to SignerRole type.

Add SignerEntityNode, SignerNodeName, SignerP2PName, SignerConsensusName constants that represent the names of the corresponding Signer roles.
release: Add oasis-remote-signer binary to the release tarball (#3226)
go: Unify CLI tools' version display and also display the Go toolchain version (#3233)
go/oasis-node/cmd/common: Add SetBasicVersionTemplate() function (#3233)

It can be used to set a basic custom version template for the given cobra command that shows the version of Oasis Core and the Go toolchain.
go/control: Add per-runtime status report (#3234)

An additional runtimes field has been added to the output of the control.GetStatus method (e.g., as reported by control status subcommand). The field contains a map of supported runtime IDs to their runtime-specific status reports.

Bug Fixes

go/common/crypto/drbg: Also consider empty slices as Null values (#3165)

The wrong handling of an edge case in the HMAC_DRBG implementation has been corrected. An update with empty additional_data now behaves the same as an update with nil additional data. While the spec is not 100% clear around how this is to be treated, supplemental documentation suggests that this is the correct way to handle it.

Oasis code never uses HMAC_DRNG with a non-nil empty additional_data parameter, so nothing changes for Oasis users.
go/consensus/tendermint: Sync state database before discarding versions (#3173)

Otherwise a crash can cause the state database to be rolled back to a version that has already been discarded from Tendermint's state stores which would prevent replay on restart.

Discovered during long-term tests.
go/genesis: Remove time sanity check (#3178)

Previously the genesis document sanity check rejected genesis documents with future timestamps which made it awkward to prepare the node in advance. Since the only supported consensus backend (Tendermint) can handle future timestamps by delaying the consensus process, allow such genesis documents.
go/registry/runtime: Validate runtime transaction scheduler parameters (#3184)

Note: Existing deployments might need to alter the runtime state dump in case existing registered runtimes have invalid parameters configured.
runtime: Use separate cache for checking transactions (#3191)

This allows calling both check and execute methods against the same runtime instance.
Executor should refresh runtime scheduling parameters (#3203)

Fixes the executor node to watch for runtime scheduling parameter changes and if needed update its scheduling configuration.
go/roothash: Make the parent block check earlier (#3206)
go/registry: Correctly propagate lookup errors (#3209)
go/oasis-node: Omit existing entity check for non-file signers (#3215)

The "registry entity init" subcommand previously always performed a check whether an entity already exists. It did that by creating an additional signer factory to perform this check.

Some signers assign exclusive access to an underlying resource (e.g., HSM) to the given factory. In that case, all operations on the second signer factory would fail. Thus we now omit the existing entity check for non-file signers.
go: Fix CLI tools to not print error messages twice (#3230)
go/runtime/transaction: Ensure consistent batch order indices (#3248)
go/worker/storage: Always use fresh nodes for policy updates (#3252)
go/worker/common: Use group-synced storage client (#3253)

Previously the runtime worker(s) used the common storage client which was not synced with any particular committee version. This could cause an executor node to use a stale storage node for storing updates.

Documentation Improvements

Add documentation example on the process of registering and running a runtime (#3081, #3207, #3228)
Expand documentation on test vectors (#3205)
Fix staking account address derivation description to match what the code does (#3240)
ADR 0002: Go Modules Compatible Git Tags (#3242)

Go Modules only allow Semantic Versioning 2.0.0 for versioning of the modules which makes it hard to work with Oasis Core's CalVer (calendar versioning) scheme.

Design a scheme for tagging Oasis Core releases with Go Modules compatible Git tags (in addition to the ordinary Git tags).

Internal Changes

go/storage/mkvs: Add NoPersist commit option (#2186)

Using the NoPersist commit option makes the Commit only compute all the hashes but does not persist any roots in the database.
go/oasis-test-runner: Add support for funding entities in genesis (#3081)

Additionally, make the default fixture command a bit more configurable.
go/worker/storage: Add initial sync from checkpoints (#3181)

Instead of relying on the slow per-block root sync, the worker now tries syncing from checkpoints, if any suitable are found.
Update Badger version to v2.2007.2 (#3182, #3227)
go/oasis-test-runner: Fix e2e/consensus-state-sync scenario (#3194)

Instead of terminating the validator-to-be-synced immediately and restarting it later, do not even start it. Early stopping could result in state that prevents proper state sync later.
Bump Go to 1.15.1 (#3197)
go: Explicitly use public key pinning for certificate verification (#3197)

While we only ever use public key pinning for authenticating TLS connections, some places still used the regular TLS config with a single certificate in the certificate pool. This causes failures on Go 1.15+ due to CommonName checks being deprecated, even if we never used hostnames for authentication.

This changes all cases to use our explicit public key pinning credentials for gRPC connections.
tests/txsource: Run queries workload against all nodes (#3209)
tests/txsource/queries: Verify consensus state integrity (#3209)
go/common/grpc: Add IsErrorCode helper method (#3209)
go/registry: Refactor runtime descriptor validity checks (#3210)
go/common/keyformat: Add support for int64 (#3210)
go/roothash/tester: Fix flaky RoundTimeoutWithEpochTransition (#3214)
ci: run the daily test for 12 hours (#3219)
Bump Rust toolchain to nightly-2020-08-29 for LVI mitigation speedups (#3231)
go: Bump bleve to 1.0.10 (#3231)
Update Go dependencies (#3238, #3255)
- cenkalti/backoff/v4: v4.0.0 -> v4.0.2
- grpc-ecosystem/go-grpc-middleware: f849b5445de4 -> v1.2.1
- hashicorp/go-multierror: v1.0.0 -> v1.1.0
- libp2p/go-libp2p: v0.10.2 -> v0.11.0
- libp2p/go-libp2p-pubsub: v0.3.3 -> v0.3.5
- multiformats/go-multiaddr: v0.2.2 -> v0.3.1
- prometheus/common: v0.10.0 -> v0.13.0
- google.golang.org/grpc: v1.31.0 -> v1.32.0
- google.golang.org/protobuf: v1.23.0 -> v1.24.0
Also updates the Go version in go.mod to 1.15.
Configure dependabot (#3239)

Configures dependabot for Go, Rust and Github Actions.
internal: Document how to include protocol versions in the Change Log (#3249)
go/runtime/committee: Support filtering nodes by tags (#3253)
Make: Augment tag-next-release to create a Go Modules compatible Git tag (#3258)

This implements the tagging scheme described in ADR 0002: Go Modules Compatible Git Tags.

20.9 (2020-08-05)

Process

Introduce Architectural Decision Records (#2924)
Remind to bump protocol versions before release (#3097)

Removals and Breaking Changes

go/registry: Add MinWriteReplication to runtime storage parameters (#1821)

The MinWriteReplication specifies the minimum number of nodes to which any writes must be replicated before being assumed to be committed.
go/common/cbor: Reject CBOR blobs with unknown fields (#2020)
go/consensus: Enable periodic state checkpoints (#2880)

This adds the following consensus parameters which control how state checkpointing is to be performed (currently not enforced):
- state_checkpoint_interval is the interval (in blocks) on which state checkpoints should be taken.
- state_checkpoint_num_kept is the number of past state checkpoints to keep.
- state_checkpoint_chunk_size is the chunk size that should be used when creating state checkpoints.
go/consensus/tendermint: Bump Tendermint Core to 0.34 (#2882)
go/worker/common/p2p: Use libp2p's gossipsub (#3010)
go/registry: Add up node thresholds for each runtime (#3027)
go/registry: Make TLS address required for RoleConsensusRPC (#3038)
go/consensus/tendermint: Fix node update verification (#3040)
runtime: Cleanup some runtime host protocol messages (#3055)
go: Rename existing staking token to base unit (#3061)

This allows introducing the concept of staking token which is defined as a given number of base units.

Additionally, rename fields of the following go/staking/api types: TransferEvent, BurnEvent, AddEscrowEvent, TakeEscrowEvent, ReclaimEscrowEvent, Transfer, Burn, Escrow, ReclaimEscrow.
go/staking: Increase reward amount denominator (#3065)

This allows the genesis block writer to specify finer reward rates.

Associated genesis controls analysis:
```
RewardAmountDenominator
|- AddRewards
|  |- RewardFactorEpochElectionAny
|  '- RewardFactorEpochSigned
'- AddRewardSingleAttenuated
   '- RewardFactorBlockProposed
```
Note to the genesis block writer: scale rewards factors up by a factor of 1,000.
go/registry/api: Remove GetNodeList method (#3067)

The GetNodeList method was unused and is therefore removed. Any code using this method can be migrated to use GetNodes instead.
go/roothash/api: Include RuntimeID field in roothash events (#3073)
go/tendermint/roothash: Include RuntimeID attribute in events (#3073)

All tendermint roothash events now include "runtime-id" attribute.
go/roothash/api: Add FinalizedEvent type to roothash events (#3073)
go/registry/api: Include transaction hash and height in all registry events (#3073)
go/backends: Return pointers in GetEvents methods (#3092)

To avoid unnecessary copying and to make the methods more unified with rest of the APIs, return pointers to events in backend GetEvents methods.
go/consensus/tendermint: Use P2P key for Tendermint P2P (#3101)

Previously the Tendermint consensus backend used the node's identity key for Tendermint P2P connections. This has now been changed to use the node's P2P key instead as that can be made ephemeral in the future.
go/oasis-test-runner/env: Rename types, fields, functions to refer to scenario (#3108)

Rename TestInstanceInfo type to ScenarioInstanceInfo and its Test field to Scenario.

Rename Env's TestInfo() and WriteTestInfo() methods to ScenarioInfo() and WriteScenarioInfo() for consistency.
go/oasis-test-runner/cmd: Rename --test flag to --scenario flag (#3108)

Rename the short version from -t to -s.
go/oasis-node/cmd/common/metrics: Rename "scenario" metrics label to "test" (#3108)
go/common/prettyprint: Augment PrettyPrinter.PrettyPrint() with Context (#3111)
go/oasis-node/cmd: Remove --retry flag from staking CLI commands (#3113)

Remove obsolete --retry flag from oasis-node stake info, oasis-node stake list and oasis-node stake account info CLI commands.
go: Remove the integrated ledger support (#3128)

The signer and associated enumeration tool have been moved to oasisprotocol/oasis-core-ledger.
go/oasis-node/cmd/common/consensus: Add context.Context to SignAndSaveTx() (#3137)
go/registry: Require SGX for non-test keymanager runtimes (#3146)

Note: Existing deployments might need to alter the state dump to fix any existing keymanager runtimes that registered without SGX hardware.
go/registry: Require SGX for non-test compute runtimes using a key manager (#3159)

Note: Existing deployments might need to alter the state dump to fix any existing compute runtimes that registered without SGX hardware and have keymanager runtime configured.

Configuration Changes

Remove explicit evidence-related consensus parameters (#2882)

The following evidence-related consensus parameters have been removed as they are now derived based on the debonding period and other parameters:
- max_evidence_age_blocks
- max_evidence_age_time
Make sure to update the genesis file.
go/consensus/tendermint: Make configuration options consistent (#3082)

All Tendermint configuration option names have been changed to be consistently placed under consensus.tendermint.. This requires any previous options that started with tendermint. to be changed to start with consensus.tendermint..
Change the way seed-only nodes are configured (#3116)

The previous --consensus.tendermint.p2p.seed_mode configuration flag has been removed. In its place there is now a more general --consensus.tendermint.mode flag which should be set to seed in order to make the node a seed-only node.

Features

go/storage/client: Use MinWriteReplication when waiting for writes (#1821)
registry: Allow nodes to opt-in to more runtimes (#2179)

Previously, when a node updated its registration, the list of runtimes had to be identical. It is now possible to add new runtimes.
e2e/tests: Added runtime upgrade test (#2520)
go oasis-node: Add CLI command for estimating gas cost of a transaction (#2723)

This adds oasis-node consensus estimate_gas.

This adds --transaction.unsigned.
go/oasis-node/cmd: Show Genesis document's hash when displaying transactions (#2871)

Show Genesis document's hash when generating staking transactions with oasis-node stake account gen_* CLI commands and when showing transactions' pretty prints with the oasis-node consensus show_tx CLI command.
go/consensus/tendermint: Add support for state sync (#2880)
go/registry/api: Add GetNodeByConsensusAddress method (#2961)

GetNodeByConsensusAddress can be used to query nodes by their Consensus address.
go/identity/cli: Add show TLS pubkey commands (#3015)

Adds following CLI helpers for displaying TLS public keys:
- oasis-node identity show-tls-pubkey --datadir <datadir> for displaying the public key used in the external node gRPC endpoints.
- oasis-node identity show-sentry-client-pubkey --datadir <datadir> for displaying the public key used by the upstream nodes when connecting to the sentry control endpoint.
go/oasis-node/cmd/stake: Support showing stake amounts in tokens (#3037)

The oasis-node stake info and oasis-node stake account info CLI commands show stake amounts (e.g. account balances, staking thresholds) in tokens.
go/staking/api: Pretty-print account balances in tokens (#3037)

If a PrettyPrinter's context carries appropriate values for the token's ticker symbol and token's value base-10 exponent, print the balance in tokens instead of base units.
go/control: Add registration status to node status (#3038)

This updates the response returned by the GetStatus method exposed by the node controller service to include a Registration field that contains information about the node's current registration.
go/control: Add identity status to node status (#3038)

This updates the response returned by the GetStatus method exposed by the node controller service to include an Identity field that contains information about the public keys used to identify a node in different contexts.
go/consensus: Add IsValidator to reported node status (#3038)
go/consensus/api: Add GetTransactionsWithResults method (#3047)

GetTransactionsWithResults returns a list of transactions and their execution results, contained within a consensus block at a specific height.
go/common/crypto/signature/signers/ledger: Descriptive error on user reject (#3050)

Make Ledger signer return a more descriptive error message when a user rejects a transaction on the Ledger device.
go/common/crypto/signature/signers/ledger: Add support for consensus signer (#3056)

Add support for consensus signer that can be used with the Oasis Validator Ledger app.
go/oasis-node/cmd/genesis: Allow setting staking token symbol and value exp (#3061)

Allow setting staking token's ticker symbol and token value's base-10 exponent in oasis-node genesis init CLI command via --staking.token_symbol and --staking.token_value_exponent flags.
go/staking: Add TokenSymbol and TokenValueExponent fields to Genesis (#3061)

They allow denominating stake amounts in tokens (besides base units used internally). For more details, see Staking Developer Docs.
go/control: List all valid TLS public keys in identity status (#3062)

This changes the Identity field in the reposnse of the GetStatus method exposed by the node controller service to include all valid TLS public keys for the node. This change affects nodes using automatic certificate rotation, which at any point use 2 valid TLS public keys.
go/oasis-node: CLI support for the GetStatus endpoint (#3064)

See docs/oasis-node/cli.md#status.
go/consensus: Expose read-only state via light client interface (#3077)

Nodes configured as consensus RPC services workers now expose read-only access to consensus state via the usual MKVS ReadSyncer interface, allowing light clients to remotely query state while transparently verifying proofs.
go/oasis-node/cmd/stake: Show pretty-printed account info (#3087)

Change oasis-node stake account info CLI command to output pretty-printed account info instead of raw JSON data.
go/staking/api: Implement PrettyPrinter interface for various types (#3087, #3132)

Implement PrettyPrinter for Transfer, Burn, Escrow, ReclaimEscrow, AmendCommissionSchedule, SharePool, StakeThreshold, StakeAccumulator, GeneralAccount, EscrowAccount, Account, CommissionRateStep, CommissionRateBoundStep and CommissionSchedule types.
go/worker/storage: Added round sync metrics (#3088)
go/registry: Add support for querying suspended runtimes (#3093)

Registry GetRuntimes method now accepts a parameter to enable querying for suspended runtimes. WatchRuntimes will now always include suspended runtimes in the initial response.
go/consensus/tendermint: Support consensus backend modes (#3116)
go/common/crypto/signature: Add a plugin backed signer implementation (#3120)

Bloating the repository with a ton of different HSM (etc) signing backends doesn't make sense, and is a maintenance burden. Use the go-plugin package to allow for externally distributed signer plugins.
go/common/grpc: Client verbose logging and metrics (#3121)

Adds option to enable verbose logging for gRPC client and adds basic gRPC client instrumentation.

Verbose gRPC client logging can be enabled with the existing grpc.log.debug flag.

Metric changes:

Existing gRPC server metrics were renamed:
- oasis_grpc_calls -> oasis_grpc_server_calls
- oasis_grpc_latency -> oasis_grpc_server_latency
- oasis_grpc_stream_writes -> oasis_grpc_server_stream_writes
Added corresponding metrics:
- oasis_grpc_client_calls gRPC client calls metric.
- oasis_grpc_client_latency gRPC client call latencies.
- oasis_grpc_client_stream_writes gRPC client stream writes.
go/common/prettyprint: Add QuantityFrac() (#3129, #3131)
go/oasis-node/cmd/common/consensus: Ask for confirmation before signing (#3134)

If file signer is used, ask for confirmation before signing a transaction, unless --assume_yes flag is set.
go/oasis-node/cmd/common/consensus: Pretty print transaction before signing it (#3134)

Adapt oasis-node stake account gen_* CLI commands to display stake amount in pretty printed transactions in token values.
go/oasis-node/cmd/common/flags: Add --assume_yes flag (#3137)
go/oasis-node/cmd/common: Add GetUserConfirmation() (#3137)
go/oasis-node/cmd/common/consensus: Print helper text about transaction review (#3149)

If one uses the signer plugin and a TTY, print a helper text to notify him that he may need to review the transaction on the device if a hardware-based signer plugin is used.
go/consensus: Add SubmitTxNoWait method (#3152)

The new method allows submitting a transaction without waiting for it to be included in a block.
go/consensus/api/transaction: Add PrettyPrintBody() to Transaction type (#3157)
go/worker/keymanager: Ignore runtimes not in policy document (#3162)
go/consensus: Move SubmitEvidence to LightClientBackend (#3169)

This allows light clients to submit evidence of Byzantine behavior.

Bug Fixes

runtime: Reduce maximum RHP message size to 16 MiB (#2213)
go/worker/storage: Fix storage node policy (#3021)
runtime/dispatcher: Break recv loop on abort request (#3023)
go/runtime/host/sandbox: Fix possible data race (#3024)

The data race existed because the cancel function that is referenced inside a goroutine waiting for initialization to complete was unintentionally overwritten.
go/consensus/tendermint: Properly handle no committed blocks (#3032)
runtime/committee/client: Reduce gRPC max backoff timeout (#3035)

Committee nodes are expected to be available and this timeout is more in line with timeouts used in the clients using these connections.
go/worker/common/p2p: Don't treat context cancellation as permanent (#3075)

Context cancellation errors should not count as permanent for P2P dispatch as the cancelled context may be due to the round advancing in which case dispatch should actually be retried.
go/oasis-test-runner/cmd: Sort scenarios for correct parallel execution (#3104)
oasis-node/cmd/unsafe-reset: Fix globs for runtime files (#3105)
go/oasis-node/cmd/common: ExportEntity should use the entity ctor (#3117)

Instead of using an entity populated with the zero values and a manually filled in public key, use the entity constructor that can fill in sensible values for things like the version.
go/consensus/tendermint/roothash: Ignore non-tracked runtimes when reindexing (#3124)
go/tendermint/roothash: Skip pruned heights when reindexing (#3127)
go/worker/common: Treat stale unauthorized peer error as permanent (#3133)

If the message's group version indicates that the message is stale and an authorization check fails, treat the error as permanent as a stale message will never become valid.
go/worker/compute: Enforce maximum batch sizes from txn scheduler (#3139)
Bump libp2p to 0.10.2 (#3150)
go/storage/mkvs/checkpoint: Remove empty version directories (#3160)

When all root checkpoints are removed for a specific version, the version dir itself should also be removed.
go/registry/metrics: Fix oasis_registry_runtimes metric (#3161)

Metric was counting runtime events, which does not correctly take into account the case where runtime is suspended and resumed. The metric is now computed by querying the registry.

Documentation Improvements

ADR 0000: Architectural Decision Records (#2924)

Introduce architectural decision records (ADRs) for keeping track of architecture decisions in a transparent way.
docs/runtime: Update the Runtime Host Protocol section (#2978)
docs: Add the Accounts section of the Staking docs (#3005)
go/staking/api: Document commission-related public types (#3042)
Add Governance Model (#3130)
ADR 0001: Multiple Roots Under the Tendermint Application Hash (#3136)

Currently the Tendermint ABCI application hash is equal to the consensus state root for a specific height. In order to allow additional uses, like proving to light clients that specific events have been emitted in a block, we should make the application hash be derivable from potentially different kinds of roots.
docs: Add cryptography section (#3147)

Internal Changes

worker/sentry: Replace policy watcher with UpdatePolicies API method (#2820)

Previously, the sentry gRPC worker watched for policy changes, but now all policy changes are pushed to the sentry node via a new sentry API method, UpdatePolicies.
go/oasis-test-runner: Use common cli package for provisioning runtimes (#3021)
go/common/encoding/bech32: Replace to-be-removed dependency (#3030)
ci: Don't automatically retry timed out jobs (#3036)
go/oasis-test-runner: Refactor E2E scenarios (#3043)

Previously there were some scenarios which incorrectly used the e2e/runtime base even though they do not need any runtimes to work. These have now been changed to use the e2e base instead.
go/oasis-test-runner/cmd/common: Give verbose error when scenario is not found (#3044)

List all available scenarios if oasis-test-runner command is invoked with an unknown scenario.
go/worker/compute/executor: Defer fetching the batch from storage (#3049)

There is no need to attempt to fetch the batch immediately, we can defer it to when we actually need to start processing the batch. This makes fetching not block P2P dispatch.
go/worker/compute/merge: Defer finalization attempt (#3049)

There is no need for the finalization attempt to block handling of an incoming commitment as any errors from that are not propagated. This avoids blocking P2P relaying as well.
go/oasis-test-runner: Support regexps for matching scenario names (#3051)
go/common/cbor: Add support for generic versioned blobs (#3052)
go/registry: Add transaction test vector generator (#3059)
go/common/prettyprint: Add PrettyType for use in test vectors (#3059)
go/consensus/tendermint/epochtime_mock: Fix initial notify (#3060)
go/tests/sentry: Add access control sanity checks (#3062)
ci/longtests: Setup prometheus monitoring (#3090)
go/consensus/tendermint: Refactor internal event handling (#3091)

Previously each consensus service client implemented its own event processing loop. All service clients now have a unified event loop implementation (each still runs in its own goroutine) that takes care of query subscriptions and event dispatch.
go: Use gofumpt instead of gofmt to format Go (#3095)
go/oasis-test-runner/cmd: Limit scenario name regex matching (#3103)

Prevent oasis-test-runner to match too many scenarios for a given scenario name regex by ensuring the given scenario name regex matches the whole scenario name.
go/tests/e2e: Add missing Clone() override to late-start (#3106)
go/oasis-test-runner: Refactor code to refer to scenario(s) consistently (#3108)
go/oasis-test-runner/oasis: Purge most of tests/fixture-data (#3110)
go/consensus/tendermint: Make New return consensus.Backend (#3115)
go/consensus/tendermint: Move GenesisProvider to api package (#3115)
go/consensus/tendermint: Move service.TendermintService to api.Backend (#3115)
go: Use cbor.Versioned for descriptor versioning (#3119)
go/e2e/txsource: Periodically restart runtime nodes (#3124)
ci: Extract go artifacts upload code into a script (#3125)
go/tests/e2e/history_reindex: Scenario that triggers roothash reindexing (#3127)
go/badger: bump badger version (#3142)
go/oasis-node: Fix the interactive prompt to be correct (#3143)

20.8 (2020-06-16)

Process

release: Create a stable branch when preparing a new release (#2993)

Currently we create a stable release branch only once we need to backport some changes. This PR changes the release process to create the stable branch when creating a new release. This will ensure CI jobs hooked to stable/ branches, such as building a release tagged CI docker image, will be run for every release.

Removals and Breaking Changes

Change staking account ids/addresses to truncated hash of the public key (#2928)

Previously, staking account identifiers were called ids and were represented by a corresponding entity's public key.

Now, they are called addresses and are represented by a truncated hash of a corresponding entity's public key, prefixed by a 1 byte address version.

Furthermore, the new staking account addresses use the newly added Bech32 encoding for text serialization with oasis as their human readable part (HRP) prefix.
go/common/crypto/signature: Rename NewBlacklistedKey() function (#2940)

Rename it to NewBlacklistedPublicKey() for consistency with the newly added NewPublicKey() function.
go/staking/api: Rename Accounts() and AccountInfo() functions (#2940)

Rename Accounts() function to Addresses() and AccountInfo() function to Account() to avoid ambiguity and better reflect their return value.
go/consensus/api: Rename Caller field in EstimateGasRequest type (#2940)

Rename EstimateGasRequest's Caller field to Signer to better describe the field's value which is the public key of the transaction's signer.
go/consensus/api: Use staking.Address in GetSignerNonceRequest type (#2940)

Replace GetSignerNonceRequest's ID field with AccountAddress field to reflect the recent staking account id/address change.
Disallow v0 entity/node/runtime descriptors (#2992)
registry: Add runtime-specific staking thresholds (#2995)
go/staking: Rename fields in Event structure (#3013)

Fields in the Event structure are renamed to drop the Event suffix, breaking Go API compatibility. This has the following effect:
- TransferEvent field is renamed to Transfer.
- BurnEvent field is renamed to Burn.
- EscrowEvent field is renamed to Escrow.
The wire format of the event structure is unchanged.
go/oasis-node/cmd/stake: Make list command's verbose output consistent (#3016)

Change oasis-node stake list --verbose CLI command's output to not list all accounts' information as a single-line JSON string but rather output each account's JSON string on a separate line.

Configuration Changes

Change staking account ids/addresses to truncated hash of the public key (#2928)

Due to this breaking change described above, the following configuration changes are needed:
- In oasis-node staking account info CLI, the --stake.account.id option has been renamed to --stake.account.address and now accepts a Bech32 encoded account address.
- In oasis-node staking account gen_transfer CLI, the --stake.transfer.destination option now accepts a Bech32 encoded account address.
- In oasis-node staking account gen_escrow and oasis-node staking account gen_reclaim_escrow CLI, the --stake.escrow.account option now accepts a Bech32 encoded account address.
go/worker/sentry: Do client authentication on sentry control grpc (#3018)

The following configuration changes are needed due to this change:
- Added: worker.sentry.control.authorized_pubkey option to configure allowed upstream nodes. This should be set to sentry client TLS keys of upstream nodes.
- Renamed: worker.sentry.control_port option to worker.sentry.control.port.

Features

go/worker/common: Allow specifying the path to the bwrap binary (#1599)

This adds a new config option --worker.runtime.sandbox_binary that allows overriding the path to the sandbox support binary (ie: bwrap).
worker/compute/executor: Independently submit commit in case of faults (#1807)
go/common/encoding: Add bech32 package implementing Bech32 encoding (#2940)
go/consensus/tendermint/apps/staking: Forbid txs for reserved addresses (#2940)

Prevent reserved staking addresses (e.g. the common pool address) from being used as the from address in staking transactions.
go/common/crypto: Add address package implementing a generic crypto address (#2940)

It supports versioning and context separation and can be used to implement specific addresses, e.g. the staking account address.
go/staking: Forbid reserved addresses in the Genesis (#2940)

Prevent reserved staking addresses (e.g. the common pool address) from being used as an account in the Genesis' staking ledger or as an address in the Genesis' (debonding) delegations.
go/common/crypto/signature: Add NewPublicKey() function (#2940)

It creates a new public key from the given hex representation or panics.
go/consensus/tendermint/api: Add OwnTxSignerAddress() to ApplicationState (#2940)

It returns the transaction signer's staking address of the local node.
go/staking/api: Add Address type for representing staking account addresses (#2940)
go/common/crypto/hash: Add Truncate() method to Hash (#2940)

It returns the first n bytes of a hash.
runtime: Handle runtime interruptions gracefully (#2991)
go/oasis-node/cmd/stake: Add pubkey2address commmand (#3003)

Add oasis-node stake pubkey2address CLI command for converting a public key (e.g. an entity's ID) to a staking account address.
go/roothash: Add commitment events (#3013)

The following two kinds of events are added to the roothash service:
- ExecutorCommittedEvent emitted when the roothash service processes a commitment from an executor node.
- MergeCommittedEvent emitted when the roothash service processes a commitment from a merge node.

Bug Fixes

staking: Don't emit zero-amount staking events (#2983)

If fees were set to 0, staking events related to the fee accumulator would still get emitted with zero amounts, which is pointless.

This fix affects only events related to the internal fee accumulator and common pool accounts, manual transfers with 0 as the amount will still get emitted.
Bump Rust toolchain to 2020-06-09 for LVI mitigations (#2987)
worker/compute: Retry local dispatch between workers (#3000)

If a node has multiple roles simultaneously, the local submissions don't go through P2P, but via a direct function call. This function call is now retried in case of errors.
go/txsource: fix queries workload earliest committee epoch (#3001)
go/oasis-node: Support non-file signers in registry node init (#3011)

Documentation Improvements

docs: Refactor setup instructions, add single validator node setup (#3006)

Internal Changes

client: Rename the rpc crate to enclave_rpc (#2469)
runtime: Rename the rpc crate to enclave_rpc (#2469)
rust: Remove the use of the failure crate (#2755)

Using this crate is no longer considered best practice, and bugs in it have broken the build before.

Note: Unfortunately the runtime-loader crate still uses this failure nonsense since the external Intel AESM client crate uses it for error handling. Since it is a stand-alone binary it has been left as is.
Makefile: update docker-shell target (#2985)
test/e2e/sentry: don't set seed node for nodes running with sentries (#2989)
ci: Remove push path filters for dockerfile build action (#2997)
go/consensus/tendermint: Refactor roothash event handling (#3013)

This makes roothash event handling similar to staking event handling, with common code paths for pubsub and polling-based calls.

It also adds Height and TxHash to roothash events.
ci: Make Buildkite fail if desired tag of Docker CI image doesn't exist (#3016)

20.7 (2020-06-08)

Removals and Breaking Changes

go/registry: Avoid storing full TLS certificates (#2556)

Previously the node registry descriptor contained full TLS certificates for talking with nodes via gRPC. This changes it so that only TLS public keys are used when verifying peer certificates for TLS authentication.

This makes the registry descriptors smaller and also makes it easier to pass around TLS identities (as public keys are much shorter).

Obviously, this change BREAKS the consensus protocol and all previously signed node descriptors.

The following configuration changes are needed due to this change:
- In oasis-node registry node CLI, the --node.committee_address option has been renamed to --node.tls_address and the format has changed from <certificate>@ip:port to <pubkey>@ip:port.
- For configuring sentry nodes on the workers, the --worker.sentry.cert_file has been removed. Instead, the --worker.sentry.address now takes the same address format as specified above (<pubkey>@ip:port).
Previously signed node descriptors (v0) are considered valid at genesis time iff the node is exclusively a validator node as indicated by the role bits. Other nodes will need to be removed from genesis.
Make oasis_ Prometheus metrics help consistent (#2602)

Help messages for metrics starting with oasis_ were revisited and made consistent. If you are using Prometheus and/or Push Gateway, you will need to clear Prometheus data/ directory and restart the services to avoid inconsistency warnings.
Refactor the runtime host APIs (#2801)

Several changes were made to the runtime host APIs used to provision and communicate with runtimes:
- The runtime host implementation has been moved to go/runtime/host.
- Some of the runtime host protocol types have been changed, all references to Worker in messages were renamed to Runtime to make it more clear what they refer to. Additionally, the Error message type has been changed to include additional fields (module and code) to make it easier to remap errors automatically.
  
  This makes it a BREAKING change for any existing runtimes.
- Provisioning of a runtime is now performed by a Provisioner which is an interface. Implementations exist for (sandboxed) ELF binaries and Intel SGX enclaves. The implementations have been refactored to be more composable, so for example the SGX implementation only implements the SGX-related bits but uses the regular provisioner otherwise.
- Configuration options for hosted runtimes have changed so existing configs will need to be updated as follows:
  - The --worker.runtime.backend option has been renamed to --worker.runtime.provisioner.
  - The --worker.runtime.loader option has been renamed to --worker.runtime.sgx.loader and is now only required for supporting SGX runtimes. Non-SGX runtimes no longer need a loader.
  - The --worker.runtime.binary option has been renamed to --worker.runtime.paths and the value format has changed to be either a YAML map or a set of comma-separated key-value pairs separated by = (e.g., <runtime-ID>=/path/to/binary).
- The key manager worker has been slightly changed to use the common runtime provisioning code. The following configuration options have been removed:
  - --worker.keymanager.tee_hardware as the TEE hardware is inferred from the runtime descriptor.
  - --worker.keymanager.runtime.loader and --worker.keymanager.runtime.binary as the common options mentioned above should be used instead.
go/consensus/tendermint: Clean up indices in SetNode (#2910)
go/registry: Drop support for v0 node descriptor (#2918)

Configuration Changes

go/oasis-node: Fix signer configuration via YAML (#2949)

The --signer argument has been renamed to --signer.backend to allow signer configuration to be passed via a YAML config. Previously, this would be impossible as signer would need to be both a string and a map at the same time when set via a YAML config.

Features

go/runtime/host/sgx: Add support for SIGSTRUCTs (#1707)

For now this will just generate one, signed with the same key that runtime-loader used to use (the Fortanix dummy key), but this will also support using file backed signatures, once we have an idea on how we are going to handle the process for such things.
Add metrics for inter-node communcation (#1771)
- New module label was added to oasis_codec_size metric which contains information of the caller. Currently p2p value denotes a peer-to-peer message among Oasis nodes and runtime-host a message from/to enclave.
- New oasis_rhp_latency summary metric for measuring Runtime Host communication latency was added.
- New oasis_rhp_successes and oasis_rhp_failures counter metrics for counting number of successful and failed Runtime Host calls respectively were added.
go/oasis-node/cmd/debug: Add the dumpdb command (#2359)

This command will attempt to extract the ABCI state from a combination of a shutdown node's on-disk database and the genesis document currently being used by the network, and will write the output as a JSON formatted genesis document.

Some caveats:
- It is not guaranteed that the dumped output will be usable as an actual genesis document without manual intervention.
- Only the state that would be exported via a normal dump from a running node will be present in the dump.
- The epochtime base will be that of the original genesis document, and not the most recent epoch (different from a genesis dump).
e2e/tests: added keymanager runtime upgrade test (#2517)
Version signed entity, node and runtime descriptors (#2581)

This introduces a DescriptorVersion field to all entity, node and runtime descriptors to support future updates and handling of legacy descriptors at genesis.

All new registrations only accept the latest version while initializing from genesis is also allowed with an older version to support a dump/restore upgrade.
Add new consensus-related Prometheus metrics (#2842)

Four new metrics have been added:
- oasis_worker_epoch_number is the current epoch number as seen by the worker.
- oasis_worker_node_registered is a binary metric which denotes, if the node is registered.
- oasis_consensus_proposed_blocks is the number of proposed Tendermint blocks by the node.
- oasis_consensus_signed_blocks is the number of Tendermint blocks the node voted for.
keymanager: Rename APIs referencing "contracts" (#2844)

Each runtime does not neccecarily have a notion for contracts, so the key manager now operates in terms of KeyPairIds that identify a given KeyPair.
oasis-net-runner: add support for running networks with non-mock IAS (#2883)
go/stats: New availability v3 formula (#2896)

Here's the implementation of the new availability score v3 for May.
consensus: Add GetStatus method to API (#2902)

A new GetStatus method has been added to the consensus API. It returns useful information about the latest block, the genesis block, and the node itself.
control: Add GetStatus method to API (#2902)

A new GetStatus method has been added to the control API. It returns the software version and the status of the consensus layer.
go/extra/stats: Give ties the same rank (#2908)

Previously records tied by availability score would get different ranks, which was wrong.
go/oasis-node/cmd/common/metrics: Deprecate formal pushgateway support (#2936)

The prometheus authors do not recommend using it for most situations, it appears to be somewhat fragile, and we shouldn't be using it internally, so the functionality is now only usable if the correct debug-only flags are set.
runtime/storage/mkvs: Add method for checking local key existence (#2938)

Adds a method to probe the local cache for key existence, guaranteeing that no remote syncing will be done.
staking: Add WatchEvents (#2944)

A new method was added to the staking API, WatchEvents. It returns a channel that produces a stream of staking Events. The Event structure was also extended to include the block height.
go/consensus/genesis: Add a public key blacklist (#2948)

This change adds a public key blacklist to the consensus parameters. All signatures made by public keys in the blacklist will be rejected.

WARNING: For now the node will panic on startup if the genesis staking ledger has entries for blacklisted public keys. By the time this feature is actually put to use (hopefully never), the staking ledger address format will be changed, resolving this caveat.

Bug Fixes

go/worker/keymanager: retry initialization in case of failure (#2517)

The keymanager worker registers only after the initialization either fails or succeeds. In case the worker needs to replicate the first initialization will always fail, since other nodes' access control prevents it from replicating. In that case the initialization should be retried.
ias: support for IAS API v4 (#2883)

IAS-proxy now proxies to IAS v4 endpoint. Attestation code now works with v4 IAS API spec.
common/flags: Fix parsing of metrics.labels, if provided in config .yml (#2905)

Bug in viper library was fixed upstream and drop-in replacement for GetStringMapString was removed.
staking: Emit events when disbursing fees and rewards (#2909)

Staking events are now generated when disbursing fees and rewards. There are two new special account IDs -- CommonPoolAccountID and FeeAccumulatorAccountID (both defined in go/staking/api/api.go), which are used only in events to signify the common pool and the fee accumulator respectively. These account IDs are invalid by design to prevent misusing them anywhere else.
runtime: Notify runtimes of its key manager policy updates (#2919)

Before runtimes were unaware of any key-manager policy updates. The runtime only queried for the active key-manager policy at startup. This is now changed so that the host notifies runtimes of any key-manager policy changes and runtime updates the policies.
go/consensus: Hash user-controlled storage key elements (#2929)
go/oasis-node/cmd/common/metrics: Re-create the pusher on failure (#2936)

When using prometheus' push client, any single failure causes the client to be unusable for future requests. Re-create the client on failure, so that metrics might start working again.
go/oasis-node: Fix parsing of signer configuration (#2950)
go/oasis-node: Make sure the node only tries to stop once (#2964)

This could previously result in a panic during shutdown.
go/oasis-node: Don't bypass Stop in newNode failure handler (#2966)
go/runtime/host/sandbox: Retry Call in case the runtime is not yet ready (#2967)
go/oasis-node: Properly handle shutdown during startup (#2975)
go/consensus/tendermint: Don't panic on context cancellation (#2982)

Documentation Improvements

docs: Add documentation around our gRPC over TLS flavor (#2556)
Document all Prometheus metrics produced by oasis-node (#2602)

List of metrics including the description, metric type, metric-specific labels, and location in the source is now available in docs/oasis-node/metrics.md Markdown file. To automate generation of this list, a new go/extra/extract-metric tool was introduced. To update the list of metrics, execute make update-docs in the project root. Documentation needs to be up to date for lint rule to succeed.

Internal Changes

ci: Automatically rebuild development/CI Docker images (#295)
go: Replace the use of pkg/error with fmt (#2057)

I also tried to make some of the error messages more consistent but gave up when I got to the staking/byzantine node related ones because none of them are following our convention.
go/control: Add IsReady() and WaitReady() RPC methods (#2130)

Beside IsSynced() and WaitSynced() which are triggered when the consensus backend is synced, new IsReady() and WaitReady() methods have been added to the client protocol. These are triggered when all node workers have been initialized (including the runtimes) and the hosted processes are ready to process requests.

In addition new oasis-node debug control wait-ready command was added which blocks the client until the node is ready.
ci: Add CI test for running E2E tests with IAS development API (#2883)
oasis-test-runner: Refactor initialization of scenario flags (#2897)

Implementations of Parameters() function defined in test-runner's scenario interface have been revised. All scenario-settable flags are now explicitly initialized and scenarios call standard FlagSet accessors to fetch scenario-specific parameters.
ci: automatically rety exit status 125 failures (#2900)
go/ias: update test vector to a v4 report (#2901)
go: Bump Go to 1.14.3 (#2913)
go: update dependencies depending on websocket@v1.4.0 (#2927)

Due to a vulnerability in websocket@1.4.0: CWE-190.

Updated libraries:
- github.com/libp2p/go-libp2p@v0.1.1 to github.com/libp2p/go-libp2p@v0.9.1
- github.com/spf13/viper@v1.6.3 to github.com/spf13/viper@v1.7.0
- replace github.com/gorilla/websocket with github.com/gorilla/websocket v1.4.2
changelog: Add a changelog fragment type for configuration changes (#2952)
runtime-loader: Bump Fortanix EDP crate versions (#2955)

Also bumps Rust nightly to 2020-05-15 as that is required to build the new versions.
go/worker/registration: Add SetAvailableWithCallback to RoleProvider (#2957)

The new method allows the caller to register a callback that will be invoked on a successful registration that includes the node descriptor updated by the passed hook.
Transfer oasis-core repository to oasisprotocol (#2968)
ci: don't retry jobs that timeout (#2969)
go: update dynlib dep (#2974)

20.6 (2020-05-07)

Removals and Breaking changes

go/consensus/tendermint: Use MKVS for storing application state (#1898)
oasis-node: Refactor metrics parameters (#2687)
- --metrics.push.job_name renamed to --metrics.job_name.
- --metrics.push.interval renamed to --metrics.interval.
- --metrics.push.instance_label replaced with more general --metrics.labels map parameter where instance is a required key, if metrics are enabled. For example --metrics.push.instance_label abc now becomes --metrics.labels instance=abc. User can also set other arbitrary Prometheus labels, for example --metrics.labels instance=abc,cpu=intel_i7-8750.
go/consensus/tendermint: Store consensus parameters in ABCI state (#2710)
go: Bump tendermint to v0.33.3-oasis1 (#2834)

This is breaking as the tendermint block format has changed.
go/consensus/genesis: Make max evidence age block and time based (#2834)
- Rename max_evidence_age -> max_evidence_age_blocks
- Add max_evidence_age_time (default 48h)
This is obviously breaking.
keymanager-lib: Bind persisted state to the runtime ID (#2843)

It is likely prudent to bind the persisted master secret to the runtime ID. This change does so by including the key manager runtime ID as the AAD when sealing the master secret.

This is backward incompatible with all current key manager instances as the existing persisted master secret will not decrypt.
go/runtime/enclaverpc: Refactor gRPC endpoint routing (#2844)

Previously each endpoint required its own gRPC service. But since all EnclaveRPC requests already include an "endpoint" field, it is better to use that for routing requests.

This commit adds a new enclaverpc.Endpoint interface that is used as an endpoint descriptor. All endpoints must be registered in advance (e.g., during init). It also changes the key manager EnclaveRPC support to use the new API.
oasis-net-runner: --net.* flags renamed to --fixture.default.* (#2848)

For example --net.node.binary mynode/oasis-node becomes --fixture.default.node.binary mynode/oasis-node.
go/consensus: Stake weighted voting (#2868)

That is, validator voting power proportional to entity stake (previously: "flat" all-validators-equal voting power). Radical!
go/common/node: Add RoleConsensusRPC role bit (#2881)

Features

go/worker/consensusrpc: Add public consensus RPC services worker (#2440)

A public consensus services worker enables any full consensus node to expose light client services to other nodes that may need them (e.g., they are needed to support light clients).

The worker can be enabled using --worker.consensusrpc.enabled and is disabled by default. Enabling the public consensus services worker exposes the light consensus client interface over publicly accessible gRPC.
go/consensus: Add basic API for supporting light consensus clients (#2440)
oasis-node: Add benchmarking utilities (#2687)
- New Prometheus metrics for:
  - datadir space usage,
  - I/O (read/written bytes),
  - memory usage (VMSize, RssAnon, RssFile, RssShmem),
  - CPU (utime and stime),
  - network interfaces (rx/tx bytes/packets),
- Bumps prometheus/go_client to latest version which fixes sending label values containing non-url characters.
- Bumps spf13/viper which fixes IsSet() behavior.
Add GetEvents to backends (#2778)

The new GetEvents call returns all events at a specific height, without having to watch for them using the Watch* methods. It is currently implemented for the registry, roothash, and staking backends.
go/keymanager/api: Add a gRPC endpoint for status queries (#2843)

Mostly so that the test cases can query statuses.
go/oasis-test-runner/oasis: Add a keymanager replication test (#2843)
oasis-net-runner: Add support for fixtures in JSON file (#2848)

New flag --fixture.file allows user to load default fixture from JSON file. In addition dump-fixture command dumps configured JSON-encoded fixture to standard output which can serve as a template.
go/consensus/tendermint: Expose new config options added in Tendermint 0.33 (#2855)

Tendermint 0.33 added the concept of unconditional P2P peers. Support for setting the unconditional peers via tendermint.p2p.unconditional_peer_ids configuration flag is added. On sentry node, upstream nodes will automatically be set as unconditional peers.

Tendermint 0.33 added support for setting maximum re-dial period when dialing persistent peers. This adds support for setting the period via tendermint.p2p.persistent_peers_max_dial_period flag.
go/consensus/tendermint: Signal RetainHeight on Commit (#2863)

This allows Tendermint Core to discard data for any heights that were pruned from application state.
go/consensus/tendermint: Bump Tendermint Core to 0.33.4 (#2863)
go/consensus/tendermint: sync-worker additionally check block timestamps (#2873)

Sync-worker relied on Tendermint fast-sync to determine if the node is still catching up. This PR adds aditional condition that the latest block is not older than 1 minute. This prevents cases where node would report as caught up after stopping fast-sync, but before it has actually caught up.
go/consensus: Add GetGenesisDocument (#2889)

The consensus client now has a new method to return the original genesis document.
go/staking: Add event hashes (#2889)

Staking events now have a new TxHash field, which contains the hash of the transaction that caused the event (or the empty hash in case of block events).

Bug Fixes

go: Extract and generalize registry's staking sanity checks (#2748)

Augment the checks to check if an entity has enough stake for all stake claims in the Genesis document to prevent panics at oasis-node start-up due to entities not having enough stake in the escrow to satisfy all their stake claims.
go/oasis-node/cmd/ias: Fix WatchRuntimes retry (#2832)

Previously the IAS proxy could incorrectly panic during shutdown when the context was cancelled.
go/worker/keymanager: Add an enclave rpc handler (#2843)
go/worker/keymanager: Actually allow replication to maybe work (#2843)

Access control forbidding replication may be more secure, but is not all that useful.
go/keymanager/client: Support km->km connections (#2843)
go/common/crypto/mrae/deoxysii: Use SHA512/256 for the KDF (#2853)

Following 73aacaa73d7116a6be0443e70f2d10d0c7a4b76e, this should also use the correct hash algorithm for the KDF.
go/extra/stats: fix & simplify node-entity mapping (#2856)

Instead of separately querying for entities and nodes, we can get Entity IDs from nodes directly.

This change also fixes a case that previous variant missed: node that was removed from entity list of nodes, but has not yet expired.
go/extra/stats: fix heights at which missing nodes should be queried (#2858)

If a missing signature is encountered, the registry should be queried at previous height, since that is the height at which the vote was made.
client/rpc: Change session identifier on reset (#2872)

Previously the EnclaveRPC client did not change the session identifier on reset, resulting in unnecessary round-trips during a transport error. The EnclaveRPC client now changes the session identifier whenever resetting the session.
go/worker/storage: Correctly apply genesis storage state (#2874)

Previously genesis storage state was only applied at consensus genesis which did not support dynamically registered runtimes. Now genesis state is correctly applied when the storage node initializes for the first time (e.g., when it sees the registered runtime).

This also removes the now unused RegisterGenesisHook method from the consensus backend API.
worker/registration: use WatchLatestEpoch when watching for registrations (#2876)

By using WatchLatestEpoch the worker will always try to register for latest known epoch, which should prevent cases where registration worker fell behind and was trying to register for past epochs.
go/runtime/client: Actually store the created key manager client (#2885)
go/runtime/committee: Restore previously picked node in RR selection (#2885)

Previously the round-robin node selection policy would randomize the order on every update ignoring the currently picked node. This would cause the current node to flip on each update causing problems with EnclaveRPC which is stateful.

The fix makes the round-robin node selection policy attempt to restore the currently picked node on each update. This means that in case the node is still in the node list, it will not change.
go/scheduler: Increase tokens per voting power (#2892)

We'll need this to fit under tendermint's maximum total voting power limit.

Documentation improvements

Refactor documentation, add architecture overview (#2791)

Internal changes

oasis-test-runner: Add benchmarking utilities (#2687)
- oasis-test-runner now accepts --metrics.address and --metrics.interval parameters which are forwarded to oasis-node workers.
- oasis-test-runner now signals oasis_up metric to Prometheus when a test starts and when it finishes.
- --num_runs parameter added which specifies how many times each test should be run.
- basic E2E test was renamed to runtime.
- Scenario names now use corresponding namespace. e.g. halt-restore is now e2e/runtime/halt-restore.
- Scenario parameters are now exposed and settable via CLI by reimplementing scenario.Parameters() and setting it with --<test_name>.<param>=<val>.
- Scenario parameters can also be generally set, for example --e2e.node.binary will set node.binary parameter for all E2E tests and --e2e/runtime.node.binary will set it for tests which inherit runtime.
- Multiple parameter values can be provided in form --<test_name>.<param>=<val1>,<val2>,.... In this case, oasis-test-runner combines them with other parameters and generates unique parameter sets for each test.
- Each scenario is run in a unique datadir per parameter set of form oasis-test-runnerXXXXXX/<test_name>/<run_id>.
- Due to very long datadir for some e2e tests, custom internal gRPC socket names are provided to oasis-node.
- If metrics are enabled, new labels are passed to oasis-nodes and pushed to Prometheus for each test:
  - instance,
  - run,
  - test,
  - software_version,
  - git_branch,
  - whole test-specific parameter set.
- New version.GitBranch variable determined and set during compilation.
- Current parameter set, run number, and test name dumped to test_info.json in corresponding datadir. This is useful when packing whole datadir for external debugging.
- New cmp command for analyzing benchmark results has been added which fetches the last two batches of benchmark results from Prometheus and compares them. For more information, see README.md in go/oasis-test-runner folder.
ci: New benchmarks pipeline has been added (#2687)

benchmarks.pipeline.yml runs all E2E tests and compares the benchmark results from the previous batch using the new oasis-test-runner cmp command.
oasis-node: Add custom internal socket path flag (for E2E tests only!) (#2687)

--debug.grpc.internal.socket_name flag was added which forces oasis-node to use the given path for the internal gRPC socket. This was necessary, because some E2E test names became very lengthy and original datadir exceeded the maximum unix socket path length. oasis-test-runner now generates shorter socket names in /tmp/oasis-test-runnerXXXXXX directory and provides them to oasis-node. Due to security risks never ever use this flag in production-like environments. Internal gRPC sockets should always reside in node datadir!
go/registry/api: Extend NodeLookup and RuntimeLookup interfaces (#2748)

Define Nodes() and AllRuntimes() methods.
go/staking/tests: Add escrow and delegations to debug genesis state (#2767)

Introduce stakingTestsState that holds the current state of staking tests and enable the staking implementation tests (StakingImplementationTest, StakingClientImplementationTests) to always use this up-to-date state.
go/runtime/committee: Don't close gRPC connections on connection refresh (#2826)
go: Refactor E2E coverage integration test wrapper (#2832)

This makes it possible to easily have E2E coverage instrumented binaries for things other than oasis-node.
go/oasis-node: Move storage benchmark subcommand under debug (#2832)
keymanager-runtime: replace with test/simple-keymanager (#2837)

Common keymanager initalization code is extracted into the keymanager-lib crate. This enables for the actual key manager implementation to only provide a set of key manager policy signers. Aditionally the keymanager-runtime crate is removed and replaced with a test simple-keymanager runtime that is used in E2E tests.
docker: remove docker image build pipelines and cleanup testing image (#2838)
go/oasis-test-runner: Generate a new random seed on each run (#2849)
go/storage/mkvs/checkpoint: Refactor restorer interface (#2860)
go/storage/mkvs/checkpoint: Add common checkpointer implementation (#2860)

Previously there was a checkpointer implemented in the storage worker but since this may be useful in multiple places, the checkpointer implementation is generalized and moved to the checkpoint package.
go/oasis-test-runner: Configure consensus state pruning (#2866)
go: Start using new protobuf module location (#2867)

The previous location has been deprecated.
go/common/pubsub: support subscriptions based on bounded ring channels (#2876)
go/epochtime: add WatchLatestEpoch method (#2876)

The method is similar to the existing WatchEpochs method, with the change that unread epochs get overridden with latest epoch.
go/common/crypto/hash: Add NewFrom and NewFromBytes functions (#2890)
ci: automatically retry jobs due to host agent failures (#2894)

20.5 (2020-04-10)

Process

Include oasis-core-runtime-loader and oasis-net-runner in releases (#2780)

Removals and Breaking changes

storage: Rename "round" to "version" (#2734)

Previously the MKVS used the term "round" to mean a monotonically increasing version number. This choice was due to the fact that it was initially used to only store runtime state which has a concept of rounds.

As we expand its use it makes more sense to generalize this and call it version.
go staking: Remove locked accounts (#2753)

We expect not to need this feature.
go/consensus: Introduce gas cost based on tx size (#2761)
storage/mkvs: Only nil value should mean deletion (#2775)

Previously an empty value in the write log signalled that the given entry is a delete operation instead of an insert one. This was incorrect as inserting an empty byte string is allowed. The value is now wrapped in an Option, with None (nil in Go) meaning delete and Some(vec![]) ([]byte{} in Go) meaning insert empty value.

This change is BREAKING as it changes write log semantics and thus it breaks the runtime worker-host protocol.
go/staking: include LastBlockFees in genesis (#2777)

Previosuly last block fees in the block of the genesis dump were lost. In the case when these fees were non-zero this also caused a missmatch in total token supply. Last block fees are now exported and during initialization of the new chain moved to the common pool.
go/staking: Three-way fee split (#2794)

We should give more to the previous block proposer, which is the block that first ran the transactions that paid the fees in the LastBlockFees. Currently they only get paid as a voter.

See oasis-core#2794 for a description of the new fee split.

Instructions for genesis document maintainers:
1. Rename fee_split_vote to fee_split_weight_vote and fee_split_propose to fee_split_weight_next_propose and add fee_split_weight_propose in .staking.params.

Features

node: Add automatic TLS certificate rotation support (#2098)

It is now possible to automatically rotate the node's TLS certificates every N epochs by passing the command-line flag worker.registration.rotate_certs. Do not use this option on sentry nodes or IAS proxies.
go/storage/mkvs: Use Badger to manage versions (#2674)

By restricting how Prune behaves (it can now only remove the earliest round) we can leverage Badger's managed mode to have it manage versions for us. This avoids the need to track node lifetimes separately.
go/common/crypto/signature/signer/composite: Initial import (#2684)

This adds a composite signer factory that can aggregate multiple signer factories. This could be used (for example), to use multiple signer backends simultaneously, depending on the key role.

Eg: The P2P link signer could use a local file, while the consensus signer can be backed by a remote HSM.
e2e tests: Test debonding entries from genesis (#2747)

Here's an e2e test scenario that exercises debonding delegation records from the genesis document.
Add support for custom runtime dispatchers (#2749)

This reorganizes the dispatching code to work with a trait rather than a concrete dispatcher object, enabling runtimes to have their own dispatchers.
txsource: delegation workload (#2752)
txsource: add a runtime workload (#2759)

The added runtime workload submits simiple-keyvalue runtime requests.
go/txsource: add a commission schedule amendments workload (#2766)

The added workload generated commission schedule amendment requests.
go/staking: add LastBlockFees query method (#2769)

LastBlockFees returns the collected fees for previous block.
txsource/queries: workload doing historical queries (#2769)

Queries workload continuously performs various historic queries using the exposed APIs and makes sure the responses make sense.
go/txsource/transfer: inlcude burn transactions in transfer workload (#2773)
go/oasis-node/cmd/debug/consim: Initial import (#2784)

Add the ability to exercise some backends without tendermint, while attempting to preserve some of the semantics.
go/runtime/client: expose GetGenesisBlock method in runtime client (#2796)

Bug Fixes

staking/state: fix DelegationsFor queries (#2756)

DelegationFor and DebondingDelegationsFor would stop traversing the state to soon in some cases.
staking/api/commission: fix possible panic in validation check (#2763)

The validation check would panic whenever the number of bound steps was greater than rate_steps + 2.
go/storage/mkvs: Don't forget to include siblings in SyncGet proof (#2775)
storage/mkvs: Don't try to sync dirty keys (#2775)
go/storage/client: Refresh connections when retrying (#2783)

Previously the storage client did not refresh connections on each retry, so in case a committee change happened while an operation was in progress, all operations continued to use the old connection (which was closed) and thus failed. We now refresh connections on each retry.
go/storage/client: Don't treat "no nodes" as a permanent error (#2785)
go/consensus/tendermint: Use our notion of latest height (#2786)

Do not let Tendermint determine the latest height as that completely ignores ABCI processing so it can return a block for which local state does not yet exist.
go/runtime/client: use history for GetBlock(latest) (#2795)

Using history for all GetBlock requests prevents the case where the latest block would already be available but not yet in history, leading to inconsistent results compared to querying by specific block number.
go/storage/mkvs: Use cbor.UnmarshalTrusted for internal metadata (#2800)
go/consensus: Shorten gas import (#2802)

Switch to more concise FromUint64.
go/consensus/tendermint/apps/staking: Propagate error in initTotalSupply (#2809)
go/staking: Use uint16 for limits in CommissionScheduleRules (#2810)
go/txsource/queries: Wait for indexed blocks before GetBlockByHash (#2814)
go/worker/registration: Fix crash when failing to query sentry addresses (#2825)
go/consensus/tendermint: Bump Tendermint Core to 0.32.10 (#2833)

Documentation improvements

README: Update Rust-related installation instructions (#2745)

Internal changes

Move storage/mkvs/urkel to just storage/mkvs (#2657)

The MKVS implementation has been changed from the initial "Urkel tree" structure and it is no longer an actual "Urkel tree" so having "urkel" in its name is just confusing.
runtime: Add hongfuzz fuzzing targets (#2705)
go/staking/api: Add more details to sanity check errors (#2760)
Make: Allow running Go unit tests and node tests independently (#2776)

They can be run using the new test-unit and test-node targets.
txsource/workload/queries: Add num last kept versions argument (#2783)
go/runtime/client: Use prefetch (GetTransactionMultiple) in QueryTxs (#2783)

Previously if multiple transactions in the same block were returned as QueryTxs results, each transaction was queried independently, resulting in multiple round trips. Now we use GetTransactionMultiple to prefetch multiple transactions in a single round trip which should improve latency.
txsource/queries: increase the odds of querying the latest height (#2787)
go/txsource/queries: obtain earliest runtime round from runtime genesis (#2796)
go/common/cbor: Add UnmarshalTrusted for trusted inputs (#2800)

The new method relaxes some decoding restrictions for cases where the inputs are trusted (e.g., because they are known to be generated by the local node itself).
oasis-test-runner/txsource: increase number of validators (#2815)

Increase the number of validators used in txsource tests so that consensus can keep making progress when one of the nodes is restarted.
go/consensus/tendermint: support DebugUnsafeReplayRecoverCorruptedWAL (#2815)

Adds support for setting tendermint DebugUnsafeReplayRecoverCorruptedWAL and enables it in daily txsource test runs.
oasis-test-runner/txsource: disable LogAssertNoTimeouts if restarts (#2817)
go/extra/stats: Update availability score formula (#2819)

As per https://docs.oasis.dev/operators/the-quest-rules.html#types-of-challenges, the availability score formula has changed from "Blocks Signed + 50 x Blocks Proposed" to "Blocks Signed + 50 x Blocks Proposed in Round 0".
oasis-test-runner/txsource: disable Merge Discrepancy checker (#2821)

Timeout due to validator restarting also causes a merge discrepancy. Since timeouts can happen, also disable the Merge discrepancy checker.
go/runtime/committee: Introduce close delay when rotating connections (#2822)

Previously a connection was immediately closed, interrupting any in-flight requests. This introduces a configurable (via WithCloseDelay option) close delay so rotated connections are only closed after some time.
go/common/grpc: Remove manual resolver hack (#2822)

Since gRPC supports the WithResolvers option to specify local resolvers there is no need to use the global resolver registry hack.
go/runtime/committee: Don't reset committees when they don't change (#2822)

Previously each committee election triggered a reset of all connections for that committee. This changes the logic to just bump the committee version in case all the committee members are the same.
tests/fixture/txsources: add initial balance for validator-3 (#2830)

20.4 (2020-03-04)

Removals and Breaking changes

go/registry: Enable non-genesis runtime registrations by default (#2406)
Optionally require a deposit for registering a runtime (#2638)
go/staking: Add stateful stake accumulator (#2642)

Previously there was no central place to account for all the parts that need to claim some part of an entity's stake which required approximations all around.

This is now changed and a stateful stake accumulator is added to each escrow account. The stake accumulator is used to track stake claims from different apps (currently only the registry).

This change also means that node registration will now always require the correct amount of stake.
go/registry: Add explicit EntityID field to Runtime descriptors (#2642)
go/staking: More reward for more signatures (#2647)

We're adjusting fee distribution and the block proposing staking reward to incentivize proposers to create blocks with more signatures.
Send and check expected epoch number during transaction execution (#2650)

Stress tests revealed some race conditions during transaction execution when there is an epoch transition. Runtime client now sends expectedEpochNumber parameter in SubmitTx call. The transaction scheduler checks whether the expected epoch matches its local one. Additionally, if state transition occurs during transaction execution, Executor and Merge committee correctly abort the transaction.
go/staking: Add per-account lockup (#2672)

With this, we'll be able to set up special accounts in the genesis document where they're not permitted to transfer staking tokens until a the specified epoch time. They can still delegate during that time.
Use --stake.shares flag when specifying shares to reclaim from an escrow (#2690)

Previously, the oasis-node stake account gen_reclaim_escrow subcommand erroneously used the --stake.amount flag for specifying the amount of shares to reclaim from an escrow.

Features

Implement node upgrade mechanism (#2607)

The node now accepts upgrade descriptors which describe the upgrade to carry out.

The node can shut down at the appropriate epoch and then execute any required migration handlers on the node itself and on the consensus layer.

Once a descriptor is submitted, the old node can be normally restarted and used until the upgrade epoch is reached; the new binary can not be used at all until the old binary has had a chance to reach the upgrade epoch. Once that is reached, the old binary will refuse to start.
go/common/crypto/signature/signers/remote: Add experimental remote signer (#2686)

This adds an experimental remote signer, reference remote signer implementation, and theoretically allows the node to be ran with a non-file based signer backend.
go/extra/stats: Figure out how many blocks entities propose (#2693)

Cross reference which node proposed each block and report these per-entity as well.
go/extra/stats: Availability ranking for next Quest phase (#2699)

A new availability score will take into account more than the number of block signatures alone.

This introduces the mechanism to compute a score and print the rankings based on that. This also implements a provisional scoring formula.
go/oasis-node/txsource: Add registration workload (#2718)
go/oasis-node/txsource: Add parallel workload (#2724)
go/scheduler: Validators now returns validators by node ID (#2739)

The consensus ID isn't all that useful for most external callers, so querying it should just return the validators by node ID instead.
go/staking: Add a Delegations() call, and expose it over gRPC (#2740)

This adds a Delegations() call in the spirit of DebondingDelegations() that returns a map of delegations for a given delegator.
go/oasis-node/txsource: Use a special account for funding accounts (#2744)

Generate and fund a special account that is used for funding accounts during the workload instead of hard-coding funding for fixed addresses.

Additionally, start using fees and non-zero gas prices in workloads.

Bug Fixes

go/storage/client: Retry storage ops on specific errors (#1865)
go/tendermint: Unfatalize seed populating nodes from genesis (#2554)

In some cases we'd prefer to include some nodes in the genesis document even when they're registered with an invalid address.

This makes the seed node ignore those entries and carry on, while keeping those entries available for the rest of the system.
go: Re-enable signature verification disabled for migration (#2615)

Now that the migration has hopefully been done, re-enable all of the signature verification that was disabled for the sake of allowing for migration.
go: Don't scan the whole keyspace in badger's tendermint DB implementation (#2664)

When we run off the end of a range iteration.
runtime: Bump ring to 0.16.11, snow to 0.6.2, Rust to 2020-02-16 (#2666)
go/staking/api: Fix genesis sanity check for nonexisting accounts (#2671)

Detect when a (debonding) delegation is specified for a nonexisting account and report an appropriate error.
go/storage/mkvs: Fix iterator bug (#2691)
go/storage/mkvs: Fix bug in key.Merge operation with extra bytes (#2698)
go/storage/mkvs: Fix removal crash when key is too short (#2698)
go/storage/mkvs: Fix node unmarshallers (#2703)
go/storage/mkvs: Fix proof verifier (#2703)
go/consensus/tendermint: Properly cache consensus parameters (#2708)
go/badger: Enable truncate to recover from corrupted value log file (#2732)

Apparently badger is not at all resilient to crashes unless the truncate option is enabled.
go/oasis-net-runner/fixtures: Increase scheduler max batch size to 16 MiB (#2741)

This change facilitates RPCs to larger, more featureful runtimes.
go/common/version: Allow omission of trailing numbers in parSemVerStr() (#2742)

Go's runtime.Version() function can omit the patch number, so augment parSemVerStr() to handle that.

Internal changes

github: Bump GoReleaser to 0.127.0 and switch back to upstream (#2564)
github: Add new steps to ci-lint workflow (#2572, #2692, #2717)

Add Lint git commits, Lint Markdown files, Lint Change Log fragments and Check go mod tidy steps to ci-lint GitHub Actions workflow.

Remove Lint Git commits step from Buildkite's CI pipeline.
ci: Skip some steps for non-code changes (#2573, #2702)

When one makes a pull request that e.g. only adds documentation or assembles the Change Log from fragments, all the heavy Buildkite pipeline steps (e.g. Go/Rust building, Go tests, E2E tests) should be skipped.
go/common/cbor: Bump fxamacker/cbor to v2.2 (#2635)
go/storage/mkvs: Fuzz storage proof decoder (#2637)
ci: merge coverage files per job (#2644)
go/oasis-test-runner: Update multiple-runtimes E2E test (#2650)

Reduce all group sizes to 1 with no backups, use EpochtimeMock to avoid unexpected blocks, add numComputeWorkers parameter.
Replace redundant fields with Consensus accessors (#2650)

Backend in go/consensus/api contains among others accessors for Beacon, EpochTime, Registry, RootHash, Scheduler, and KeyManager. Use those instead of direct references. The following structs were affected:
- Node in go/cmd/node,
- Node in go/common/committee,
- Worker in go/common,
- clientCommon in go/runtime/client,
- Group in go/worker/common/committee.
go/storage: Refactor checkpointing interface (#2659)

Previously the way storage checkpoints were implemented had several drawbacks, namely:
- Since the checkpoint only streamed key/value pairs this prevented correct tree reconstruction as tree nodes also include a Round field which specifies the round at which a given tree node was created.
- While old checkpoints were streamed in chunks and thus could be resumed or streamed in parallel from multiple nodes, there was no support for verifying the integrity of a single chunk.
This change introduces an explicit checkpointing mechanism with a simple file-based backend reference implementation. The same mechanism could also be used in the future with Tendermint's app state sync proposal.
changelog: Use Git commit message style for Change Log fragments (#2662)

For more details, see the description in Change Log fragments.
Make: Add lint targets (#2662, #2692)

Add a general lint target that depends on the following lint targets:
- lint-go: Lint Go code,
- lint-git: Lint git commits,
- lint-md: Lint Markdown files (except Change Log fragments),
- lint-changelog: Lint Change Log fragments.
Add sanity checks for stake accumulator state integrity (#2665)
go/consensus/tendermint: Don't use UnsafeSigner (#2670)
rust: Update ed25519-dalek and associated dependencies (#2678)

This change updates ed25519-dalek, rand and x25519-dalek.
Bump minimum Go version to 1.13.8 (#2689)
go/storage/mkvs: Add overlay tree to support rolling back state (#2691)
go/storage/mkvs: Make Tree an interface (#2691)
gitlint: Require body length of at least 20 characters (if body exists) (#2692)
Make build-fuzz work again, test it on CI (#2695)
changelog: Reference multiple issues/pull requests for a single entry (#2697)

For more details, see the description in Change Log fragments.
go/storage/mkvs: Add MKVS fuzzing (#2698)
github: Don't trigger ci-reproducibility workflow for pull requests (#2704)
go/oasis-test-runner: Improve txsource E2E test (#2709)

This adds the following general txsource scenario features:
- Support for multiple parallel workloads.
- Restart random nodes on specified interval.
- Ensure consensus liveness for the duration of the test.
It also adds an oversized txsource workload which submits oversized transactions periodically.
go/consensus/tendermint: Expire txes when CheckTx is disabled (#2720)

When CheckTx is disabled (for debug purposes only, e.g. in E2E tests), we still need to periodically remove old transactions as otherwise the mempool will fill up. Keep track of transactions were added and invalidate them when they expire.
runtime: Remove the non-webpki/snow related uses of ring (#2733)

As much as I like the concept of ring as a library, and the implementation, the SGX support situation is ridiculous, and we should minimize the use of the library for cases where alternatives exist.

20.3 (2020-02-06)

Removals and Breaking changes

Add gRPC Sentry Nodes support (#1829)

This adds gRPC proxying and policy enforcement support to existing sentry nodes, which enables protecting upstream nodes' gRPC endpoints.

Added/changed flags:
- worker.sentry.grpc.enabled: enables the gRPC proxy (requires worker.sentry.enabled flag)
- worker.sentry.grpc.client.port: port on which gRPC proxy is accessible
- worker.sentry.grpc.client.address: addresses on which gRPC proxy is accessible (needed so protected nodes can query sentries for its addresses)
- worker.sentry.grpc.upstream.address: address of the protected node
- worker.sentry.grpc.upstream.cert: public certificate of the upstream grpc endpoint
- worker.registration.sentry.address renamed back to worker.sentry.address
- worker.registration.sentry.cert_file renamed back to worker.sentry.cert_file
go/common/crypto/tls: Use ed25519 instead of P-256 (#2058)

This change is breaking as the old certificates are no longer supported, and they must be regenerated. Note that this uses the slower runtime library ed25519 implementation instead of ours due to runtime library limitations.
All marshalable enumerations in the code were checked and the default Invalid = 0 value was added, if it didn't exist before (#2546)

This makes the code less error prone and more secure, because it requires the enum field to be explicitly set, if some meaningful behavior is expected from the corresponding object.
go/registry: Add ConsensusParams.MaxNodeExpiration (#2580)

Node expirations being unbound is likely a bad idea. This adds a consensus parameter that limits the maximum lifespan of a node registration, to a pre-defined number of epochs (default 5).

Additionally the genesis document sanity checker is now capable of detecting if genesis node descriptors have invalid expirations.

Note: Existing deployments will need to alter the state dump to configure the maximum node expiration manually before a restore will succeed.
go/common/crypto/signature: Use base64-encoded IDs/public keys (#2588)

Change String() method to return base64-encoded representation of a public key instead of the hex-encoded representation to unify CLI experience when passing/printing IDs/public keys.
go/registry: Disallow entity signed node registrations (#2594)

This feature is mostly useful for testing and should not be used in production, basically ever. Additionally, when provisioning node descriptors, --node.is_self_signed is now the default.

Note: Breaking if anyone happens to use said feature, but enabling said feature is already feature-gated, so this is unlikely.
go/registry: Ensure that node descriptors are signed by all public keys (#2599)

To ensure that nodes demonstrate proof that they posses the private keys for all public keys contained in their descriptor, node descriptors now must be signed by the node, consensus, p2p and TLS certificate key.

Note: Node descriptors generated prior to this change are now invalid and will be rejected.
Rewards and fees consensus parameters (#2624)

Previously things like reward "factors" and fee distribution "weights" were hardcoded. But we have pretty good support for managing consensus parameters, so we ought to move them there.
Special rewards for block proposer (#2625)
- a larger portion of the fees
- an additional reward
go/consensus/tendermint: mux offset block height consistently (#2634)

We've been using blockHeight+1 for getting the epoch time except for on blockHeight=1. The hypothesis in this change is that we don't need that special case.
Tendermint P2P configuration parameters (#2646)

This allows configuring P2P parameters:
- MaxNumInboundPeers,
- MaxNumOutboundPeers,
- SendRate and
- RecvRate
through their respective CLI flags:
- tendermint.p2p.max_num_inbound_peers,
- tendermint.p2p.max_num_outbound_peers,
- tendermint.p2p.send_rate, and
- tendermint.p2p.recv_rate.
It also increases the default value of MaxNumOutboundPeers from 10 to 20 and moves all P2P parameters under the tendermint.p2p.* namespace.
Add oasis-node identity tendermint show-{node,consensus}-address subcommands (#2649)

The show-node-address subcommmand returns node's public key converted to Tendermint's address format. It replaces the oasis-node debug tendermint show-node-id subcommand.

The show-consensus-address subcommand returns node's consensus key converted to Tendermint's address format.

Features

Refresh node descriptors mid-epoch (#1794)

Previously node descriptors were only refreshed on an epoch transition which meant that any later updates were ignored until the next epoch. This caused stale RAKs to stay in effect when runtime restarts happened, causing attestation verification to fail.

Enabling mid-epoch refresh makes nodes stay up to date with committee member node descriptor updates.
go/worker/storage: Add configurable limits for storage operations (#1914)
Flexible key manager policy signers (#2444)

The key manager runtime has been split into multiple crates to make its code reusable. It is now possible for others to write their own key managers that use a different set of trusted policy signers.
Add oasis-node registry node is-registered subcommand (#2508)

It checks whether the node is registered.
Runtime node admission policies (#2513)

With this, each runtime can define its node admission policy.

Currently only two policies should be supported:
- Entity whitelist (only nodes belonging to whitelisted entities can register to host a runtime).
- Anyone with enough stake (currently the only supported policy).
The second one (anyone with enough stake) can introduce liveness issues as long as there is no slashing for compute node liveness (see #2078).
go/keymanager: Support policy updates (#2516)

This change adds the ability for the key manager runtime owner to update the key manger policy document at runtime by submitting an appropriate transaction.

Note: Depending on the nature of the update it may take additional epoch transitions for the key manager to be available to clients.
Tooling for runtimes' node admission policy (#2563)

We added a policy type where you can whitelist the entities that can operate compute nodes. This adds the tooling around it so things like the registry runtime genesis init tool can set them up.
Export signer public key to entity (#2609)

We added a command to export entities from existing signers, and a check to ensure that the entity and signer public keys match.

This makes it so that a dummy entity cannot be used for signers backed by Ledger.
go/registry: Handle the old and busted node descriptor envelope (#2614)

The old node descriptor envelope has one signature. The new envelope has multiple signatures, to ensure that the node has access to the private component of all public keys listed in the descriptor.

The correct thing to do, from a security standpoint is to use a new set of genesis node descriptors. Instead, this change facilitates the transition in what is probably the worst possible way by:
- Disabling signature verification entirely for node descriptors listed in the genesis document (Technically this can be avoided, but there are other changes to the node descriptor that require no verification to be done if backward compatibility is desired).
- Providing a conversion tool that fixes up the envelopes to the new format.
- Omitting descriptors that are obviously converted from state dumps.
Note: Node descriptors that are using the now deprecated option to use the entity key for signing are not supported at all, and backward compatibility will NOT be maintained.
go/oasis-node/cmd/debug/fixgenesis: Support migrating Node.Roles (#2620)

The node.RolesMask bit definitions have changed since the last major release deployed to the wild, so support migrating things by rewriting the node descriptor.

Note: This assumes that signature validation in InitChain is disabled.

Bug Fixes

go/registry: deduplicate registry sanity checks and re-enable address checks (#2428)

Existing deployments had invalid P2P/Committee IDs and addresses as old code did not validate all the fields at node registration time. All ID and address validation checks are now enabled.

Additionally, separate code paths were used for sanity checking of the genesis and for actual validation at registration time, which lead to some unexpected cases where invalid genesis documents were passing the validation. This code (at least for registry application) is now unified.
Make oasis-node binaries made with GoReleaser via GitHub Actions reproducible again (#2571)

Add -buildid= back to ldflags to make builds reproducible again.

As noted in 60641ce, this should be no longer necessary with Go 1.13.4+, but there appears to be a specific issue with GoReleaser's build handling.
go/worker/storage: Fix sync deadlock (#2584)
go/consensus/tendermint: Always accept own transactions (#2586)

A validator node should always accept own transactions (signed by the node's identity key) regardless of the configured gas price.
go/registry: Allow expired registrations at genesis (#2598)

The dump/restore process requires this to be permitted as expired registrations are persisted through an entity's debonding period.
go/oasis-node/cmd/registry/runtime: Fix loading entities in registry runtime subcommands (#2606)
go/storage: Fix invalid memory access crash in Urkel tree (#2611)
go/consensus/tendermint/apps/staking: Fix epochtime overflow (#2627)
go/tendermint/keymanager: Error in Status() if keymanager doesn't exist (#2628)

This fixes panics in the key-manager client if keymanager for the specific runtime doesn't exist.
go/oasis-node/cmd/stake: Make info subcommand tolerate invalid thresholds (#2632)

Change the subcommand to print valid staking threshold kinds and warn about invalid ones.
go/staking/api: Check if thresholds for all kinds are defined in genesis (#2633)
go/cmd/registry/runtime: Fix provisioning a runtime without keymanager (#2639)
registry/api/sanitycheck: Move genesis stateroot check into registration (#2643)

Runtime genesis check should only be done when registering, not during the sanity checks.
Make oasis control is-synced subcommand more verbose (#2649)

Running oasis-node control is-synced will now print a message indicating whether a node has completed initial syncing or not to stdout in addition to returning an appropriate status code.

Internal changes

go/genesis: Fix genesis tests and registry sanity checks (#2589)
github: Add ci-reproducibility workflow (#2590)

The workflow spawns two build jobs that use the same build environment, except for the path of the git checkout. The oasis-node binary is built two times, once directly via Make's go build invocation and the second time using the GoReleaser tool that is used to make the official Oasis Core releases. The last workflow job compares both checksums of both builds and errors if they are not the same.
go/consensus/tendermint/abci: Add mock ApplicationState (#2629)

This makes it easier to write unit tests for functions that require ABCI state.

20.2 (2020-01-21)

Removals and Breaking changes

go node: Unite compute, merge, and transaction scheduler roles (#2107)

We're removing the separation among registering nodes for the compute, merge, and transaction scheduler roles. You now have to register for and enable all or none of these roles, under a new, broadened, and confusing--you're welcome--term "compute".
Simplify tendermint sentry node setup. (#2362)

Breaking configuration changes:
- worker.sentry.address renamed to: worker.registration.sentry.address
- worker.sentry.cert_file renamed to: worker.registration.sentry.cert_file
- tendermint.private_peer_id removed
- added tendermint.sentry.upstream_address which should be set on sentry node and it will set tendermint.private_peer_id and tendermint.peristent_peer for the configured addresses
Charge gas for runtime transactions and suspend runtimes which do not pay periodic maintenance fees (#2504)

This introduces gas fees for submitting roothash commitments from runtime nodes. Since periodic maintenance work must be performed on each epoch transition (e.g., electing runtime committees), fees for that maintenance are paid by any nodes that register to perform work for a specific runtime. Fees are pre-paid for the number of epochs a node registers for.

If the maintenance fees are not paid, the runtime gets suspended (so periodic work is not needed) and must be resumed by registering nodes.
go: Rename compute -> executor (#2525)

It was proposed that we rename the "compute" phase (of the txnscheduler, compute, merge workflow) to "executor".

Things that remain as "compute":
- the registry node role
- the registry runtime kind
- the staking threshold kind
- things actually referring to processing inputs to outputs
- one of the drbg contexts
So among things that are renamed are fields of the on-chain state and command line flags.
RuntimeID is not hard-coded in the enclave anymore (#2529)

It is passed when dispatching the runtime. This enables the same runtime binary to be registered and executed multiple times with different RuntimeID.

Features

Consensus simulation mode and fee estimator (#2521)

This change allows the compute nodes to participate in networks which require gas fees for various operations in the network. Gas is automatically estimated by simulating transactions while gas price is currently "discovered" manually via node configuration.

The following configuration flags are added:
- consensus.tendermint.submission.gas_price should specify the gas price that the node will be using in all submitted transactions.
- consensus.tendermint.submission.max_fee can optionally specify the maximum gas fee that the node will use in submitted transactions. If the computed fee would ever go over this limit, the transaction will not be submitted and an error will be returned instead.
Optimize registry runtime lookups during node registration (#2538)

A performance optimization to avoid loading a list of all registered runtimes into memory in cases when only a specific runtime is actually needed.

Bug Fixes

Don't allow duplicate P2P connections from the same IP by default (#2558)
go/extra/stats: handle nil-votes and non-registered nodes (#2566)
go/oasis-node: Include account ID in stake list -v subcommand (#2567)

Changes stake list -v subcommand to return a map of IDs to accounts.
Use a newer version of the oasis-core tendermint fork (#2569)

The updated fork has additional changes to tendermint to hopefully prevent the node from crashing if the file descriptors available to the process get exhausted due to hitting the rlimit.

While no forward progress can be made while the node is re-opening the WAL, the node will now flush incoming connections that are in the process of handshaking, and retry re-opening the WAL instead of crashing with a panic.

Documentation improvements

Document versioning scheme used for Oasis Core and its Protocols (#2457)

See Versioning Scheme.
Document Oasis Core's release process (#2565)

See Release process.

20.1 (2020-01-14)

Features

go/worker/txnscheduler: Check transactions before queuing them (#2502)

The transaction scheduler can now optionally run runtimes and check transactions before scheduling them (see issue #1963). This functionality is disabled by default, enable it with worker.txn_scheduler.check_tx.enabled.

Bug Fixes

go/runtime/client: Return empty sequences instead of nil (#2542)

The runtime client endpoint should return empty sequences instead of nil as serde doesn't know how to decode a NULL when the expected type is a sequence.
Temporarily disable consensus address checks at genesis (#2552)

20.0 (2020-01-10)

Removals and Breaking changes

Use the new runtime ID allocation scheme (#1693)

This change alters the runtime ID allocation scheme to reserve the first 64 bits for flags indicating various properties of the runtime, and to forbid registering runtimes that have test runtime IDs unless the appropriate consensus flag is set.
Remove staking-related roothash messages (#2377)

There is no longer a plan to support direct manipulation of the staking accounts from the runtimes in order to isolate the runtimes from corrupting the consensus layer.

To reduce complexity, the staking-related roothash messages were removed. The general roothash message mechanism stayed as-is since it may be useful in the future, but any commits with non-empty messages are rejected for now.
Refactoring of roothash genesis block for runtime (#2426)
- RuntimeGenesis.Round field was added to the roothash block for the runtime which can be set by --runtime.genesis.round flag.
- The RuntimeGenesis.StorageReceipt field was replaced by StorageReceipts list, one for each storage node.
- Support for base64 encoding/decoding of Bytes was added in rust.
When registering a new runtime, require that the given key manager ID points to a valid key manager in the registry (#2459)
Remove oasis-node debug dummy sub-commands (#2492)

These are only useful for testing, and our test harness has a internal Go API that removes the need to have this functionality exposed as a sub-command.
Make storage per-runtime (#2494)

Previously there was a single storage backend used by oasis-node which required that a single database supported multiple namespaces for the case when multiple runtimes were being used in a single node.

This change simplifies the storage database backends by removing the need for backends to implement multi-namespace support, reducing overhead and cleanly separating per-runtime state.

Due to this changing the internal database format, this breaks previous (compute node) deployments with no way to do an automatic migration.

Features

Add oasis-node debug storage export sub-command (#1845)
Add fuzzing for consensus methods (#2245)

Initial support for fuzzing was added, along with an implementation of it for some of the consensus methods. The implementation uses oasis-core's demultiplexing and method dispatch mechanisms.
Add storage backend fuzzing (#2246)

Based on the work done for consensus fuzzing, support was added to run fuzzing jobs on the storage api backend.
Add oasis-node unsafe-reset sub-command which resets the node back to a freshly provisioned state, preserving any key material if it exists (#2435)
Add txsource (#2478)

The so-called "txsource" utility introduced in this PR is a starting point for something like a client that sends transactions for a long period of time, for the purpose of creating long-running tests.

With this change is a preliminary sample "workload"--a DRBG-backed schedule of transactions--which transfers staking tokens around among a set of test accounts.
Add consensus block and transaction metadata accessors (#2482)

In order to enable people to build "network explorers", we exposed some additional methods via the consensus API endpoint, specifically:
- Consensus block metadata.
- Access to raw consensus transactions within a block.
- Stream of consensus blocks as they are finalized.
Make maximum in-memory cache size for runtime storage configurable (#2494)

Previously the value of 64mb was always used as the size of the in-memory storage cache. This adds a new configuration parameter/command-line flag --storage.max_cache_size which configures the maximum size of the in-memory runtime storage cache.
Undisable transfers for some senders (#2498)

Ostensibly for faucet purposes while we run the rest of the network with transfers disabled, this lets us identify a whitelist of accounts from which we allow transfers when otherwise transfers are disabled.

Configure this with a map of allowed senders' public keys -> true in the new undisable_transfers_from field in the staking consensus parameters object along with "disable_transfers": true.
Entity block signatures count tool (#2500)

The tool uses node consensus and registry API endpoints and computes the per entity block signature counts.

Bug Fixes

Reduce Badger in-memory cache sizes (#2484)

The default is 1 GiB per badger instance and we use a few instances so this resulted in some nice memory usage.

19.0 (2019-12-18)

Process

Start using the new Versioning and Release process for Oasis Core. (#2419)

Adopt a CalVer (calendar versioning) scheme for Oasis Core (as a whole) with the following format:
```
YY.MINOR[.MICRO][-MODIFIER]
```
where:
- YY represents short year (e.g. 19, 20, 21, ...),
- MINOR represents the minor version starting with zero (e.g. 0, 1, 2, 3, ...),
- MICRO represents (optional) final number in the version (sometimes referred to as the "patch" segment) (e.g. 0, 1, 2, 3, ...).
  
  If the MICRO version is 0, it is be omitted.
- MODIFIER represents (optional) build metadata, e.g. git8c01382.
The new Versioning and Release process will be described in more detail in the future. For more details, see #2457.

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Change Log

20.12 (2020-11-03)

Removals and Breaking Changes

Configuration Changes

Features

Bug Fixes

20.11.3 (2020-10-16)

Bug Fixes

Internal Changes

20.11.2 (2020-10-13)

Features

Bug Fixes

Internal Changes

20.11.1 (2020-10-07)

Features

Internal Changes

20.11 (2020-09-23)

Configuration Changes

Features

Bug Fixes

Documentation Improvements

Internal Changes

20.10 (2020-09-09)

Removals and Breaking Changes

Configuration Changes

Features

Bug Fixes

Documentation Improvements

Internal Changes

20.9 (2020-08-05)

Process

Removals and Breaking Changes

Configuration Changes

Features

Bug Fixes

Documentation Improvements

Internal Changes

20.8 (2020-06-16)

Process

Removals and Breaking Changes

Configuration Changes

Features

Bug Fixes

Documentation Improvements

Internal Changes

20.7 (2020-06-08)

Removals and Breaking Changes

Configuration Changes

Features

Bug Fixes

Documentation Improvements

Internal Changes

20.6 (2020-05-07)

Removals and Breaking changes

Features

Bug Fixes

Documentation improvements

Internal changes

20.5 (2020-04-10)

Process

Removals and Breaking changes

Features

Bug Fixes

Documentation improvements

Internal changes

20.4 (2020-03-04)

Removals and Breaking changes

Features

Bug Fixes

Internal changes

20.3 (2020-02-06)

Removals and Breaking changes

Features

Bug Fixes